| /* PowerPC64-specific support for 64-bit ELF. |
| Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
| Free Software Foundation, Inc. |
| Written by Linus Nordberg, Swox AB <info@swox.com>, |
| based on elf32-ppc.c by Ian Lance Taylor. |
| Largely rewritten by Alan Modra <amodra@bigpond.net.au> |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License along |
| with this program; if not, write to the Free Software Foundation, Inc., |
| 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| |
| |
| /* The 64-bit PowerPC ELF ABI may be found at |
| http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and |
| http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */ |
| |
| #include "sysdep.h" |
| #include <stdarg.h> |
| #include "bfd.h" |
| #include "bfdlink.h" |
| #include "libbfd.h" |
| #include "elf-bfd.h" |
| #include "elf/ppc64.h" |
| #include "elf64-ppc.h" |
| |
| static bfd_reloc_status_type ppc64_elf_ha_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type ppc64_elf_branch_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type ppc64_elf_brtaken_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type ppc64_elf_sectoff_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type ppc64_elf_toc_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type ppc64_elf_toc_ha_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type ppc64_elf_toc64_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type ppc64_elf_unhandled_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_vma opd_entry_value |
| (asection *, bfd_vma, asection **, bfd_vma *); |
| |
| #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec |
| #define TARGET_LITTLE_NAME "elf64-powerpcle" |
| #define TARGET_BIG_SYM bfd_elf64_powerpc_vec |
| #define TARGET_BIG_NAME "elf64-powerpc" |
| #define ELF_ARCH bfd_arch_powerpc |
| #define ELF_MACHINE_CODE EM_PPC64 |
| #define ELF_MAXPAGESIZE 0x10000 |
| #define ELF_COMMONPAGESIZE 0x1000 |
| #define elf_info_to_howto ppc64_elf_info_to_howto |
| |
| #define elf_backend_want_got_sym 0 |
| #define elf_backend_want_plt_sym 0 |
| #define elf_backend_plt_alignment 3 |
| #define elf_backend_plt_not_loaded 1 |
| #define elf_backend_got_header_size 8 |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_can_refcount 1 |
| #define elf_backend_rela_normal 1 |
| #define elf_backend_default_execstack 0 |
| |
| #define bfd_elf64_mkobject ppc64_elf_mkobject |
| #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup |
| #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup |
| #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data |
| #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook |
| #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create |
| #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free |
| #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab |
| |
| #define elf_backend_object_p ppc64_elf_object_p |
| #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus |
| #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo |
| #define elf_backend_write_core_note ppc64_elf_write_core_note |
| #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections |
| #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol |
| #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook |
| #define elf_backend_check_directives ppc64_elf_check_directives |
| #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup |
| #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup |
| #define elf_backend_check_relocs ppc64_elf_check_relocs |
| #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref |
| #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook |
| #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook |
| #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol |
| #define elf_backend_hide_symbol ppc64_elf_hide_symbol |
| #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust |
| #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections |
| #define elf_backend_init_index_section _bfd_elf_init_2_index_sections |
| #define elf_backend_action_discarded ppc64_elf_action_discarded |
| #define elf_backend_relocate_section ppc64_elf_relocate_section |
| #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol |
| #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class |
| #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections |
| #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook |
| #define elf_backend_special_sections ppc64_elf_special_sections |
| |
| /* The name of the dynamic interpreter. This is put in the .interp |
| section. */ |
| #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| |
| /* The size in bytes of an entry in the procedure linkage table. */ |
| #define PLT_ENTRY_SIZE 24 |
| |
| /* The initial size of the plt reserved for the dynamic linker. */ |
| #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE |
| |
| /* TOC base pointers offset from start of TOC. */ |
| #define TOC_BASE_OFF 0x8000 |
| |
| /* Offset of tp and dtp pointers from start of TLS block. */ |
| #define TP_OFFSET 0x7000 |
| #define DTP_OFFSET 0x8000 |
| |
| /* .plt call stub instructions. The normal stub is like this, but |
| sometimes the .plt entry crosses a 64k boundary and we need to |
| insert an addi to adjust r12. */ |
| #define PLT_CALL_STUB_SIZE (7*4) |
| #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */ |
| #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */ |
| #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */ |
| #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */ |
| #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */ |
| /* ld %r11,xxx+16@l(%r12) */ |
| #define BCTR 0x4e800420 /* bctr */ |
| |
| |
| #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */ |
| #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */ |
| #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */ |
| #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */ |
| |
| #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */ |
| #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */ |
| |
| #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */ |
| |
| /* glink call stub instructions. We enter with the index in R0. */ |
| #define GLINK_CALL_STUB_SIZE (16*4) |
| /* 0: */ |
| /* .quad plt0-1f */ |
| /* __glink: */ |
| #define MFLR_R12 0x7d8802a6 /* mflr %12 */ |
| #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */ |
| /* 1: */ |
| #define MFLR_R11 0x7d6802a6 /* mflr %11 */ |
| #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */ |
| #define MTLR_R12 0x7d8803a6 /* mtlr %12 */ |
| #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */ |
| /* ld %11,0(%12) */ |
| /* ld %2,8(%12) */ |
| /* mtctr %11 */ |
| /* ld %11,16(%12) */ |
| /* bctr */ |
| |
| /* Pad with this. */ |
| #define NOP 0x60000000 |
| |
| /* Some other nops. */ |
| #define CROR_151515 0x4def7b82 |
| #define CROR_313131 0x4ffffb82 |
| |
| /* .glink entries for the first 32k functions are two instructions. */ |
| #define LI_R0_0 0x38000000 /* li %r0,0 */ |
| #define B_DOT 0x48000000 /* b . */ |
| |
| /* After that, we need two instructions to load the index, followed by |
| a branch. */ |
| #define LIS_R0_0 0x3c000000 /* lis %r0,0 */ |
| #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */ |
| |
| /* Instructions used by the save and restore reg functions. */ |
| #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */ |
| #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */ |
| #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */ |
| #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */ |
| #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ |
| #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ |
| #define LI_R12_0 0x39800000 /* li %r12,0 */ |
| #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */ |
| #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */ |
| #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */ |
| #define BLR 0x4e800020 /* blr */ |
| |
| /* Since .opd is an array of descriptors and each entry will end up |
| with identical R_PPC64_RELATIVE relocs, there is really no need to |
| propagate .opd relocs; The dynamic linker should be taught to |
| relocate .opd without reloc entries. */ |
| #ifndef NO_OPD_RELOCS |
| #define NO_OPD_RELOCS 0 |
| #endif |
| |
| #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1) |
| |
| /* Relocation HOWTO's. */ |
| static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max]; |
| |
| static reloc_howto_type ppc64_elf_howto_raw[] = { |
| /* This reloc does nothing. */ |
| HOWTO (R_PPC64_NONE, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_NONE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A standard 32 bit relocation. */ |
| HOWTO (R_PPC64_ADDR32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* An absolute 26 bit branch; the lower two bits must be zero. |
| FIXME: we don't check that, we just clear them. */ |
| HOWTO (R_PPC64_ADDR24, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 26, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR24", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x03fffffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A standard 16 bit relocation. */ |
| HOWTO (R_PPC64_ADDR16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A 16 bit relocation without overflow. */ |
| HOWTO (R_PPC64_ADDR16_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Bits 16-31 of an address. */ |
| HOWTO (R_PPC64_ADDR16_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Bits 16-31 of an address, plus 1 if the contents of the low 16 |
| bits, treated as a signed number, is negative. */ |
| HOWTO (R_PPC64_ADDR16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_ha_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* An absolute 16 bit branch; the lower two bits must be zero. |
| FIXME: we don't check that, we just clear them. */ |
| HOWTO (R_PPC64_ADDR14, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_branch_reloc, /* special_function */ |
| "R_PPC64_ADDR14", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* An absolute 16 bit branch, for which bit 10 should be set to |
| indicate that the branch is expected to be taken. The lower two |
| bits must be zero. */ |
| HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_brtaken_reloc, /* special_function */ |
| "R_PPC64_ADDR14_BRTAKEN",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* An absolute 16 bit branch, for which bit 10 should be set to |
| indicate that the branch is not expected to be taken. The lower |
| two bits must be zero. */ |
| HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_brtaken_reloc, /* special_function */ |
| "R_PPC64_ADDR14_BRNTAKEN",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A relative 26 bit branch; the lower two bits must be zero. */ |
| HOWTO (R_PPC64_REL24, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 26, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_branch_reloc, /* special_function */ |
| "R_PPC64_REL24", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x03fffffc, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* A relative 16 bit branch; the lower two bits must be zero. */ |
| HOWTO (R_PPC64_REL14, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_branch_reloc, /* special_function */ |
| "R_PPC64_REL14", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| the branch is expected to be taken. The lower two bits must be |
| zero. */ |
| HOWTO (R_PPC64_REL14_BRTAKEN, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_brtaken_reloc, /* special_function */ |
| "R_PPC64_REL14_BRTAKEN", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| the branch is not expected to be taken. The lower two bits must |
| be zero. */ |
| HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_brtaken_reloc, /* special_function */ |
| "R_PPC64_REL14_BRNTAKEN",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the |
| symbol. */ |
| HOWTO (R_PPC64_GOT16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_GOT16_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_GOT16_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_GOT16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* This is used only by the dynamic linker. The symbol should exist |
| both in the object being run and in some shared library. The |
| dynamic linker copies the data addressed by the symbol from the |
| shared library into the object, because the object being |
| run has to have the data at some particular address. */ |
| HOWTO (R_PPC64_COPY, /* type */ |
| 0, /* rightshift */ |
| 0, /* this one is variable size */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_COPY", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR64, but used when setting global offset table |
| entries. */ |
| HOWTO (R_PPC64_GLOB_DAT, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GLOB_DAT", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Created by the link editor. Marks a procedure linkage table |
| entry for a symbol. */ |
| HOWTO (R_PPC64_JMP_SLOT, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_JMP_SLOT", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Used only by the dynamic linker. When the object is run, this |
| doubleword64 is set to the load address of the object, plus the |
| addend. */ |
| HOWTO (R_PPC64_RELATIVE, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_RELATIVE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR32, but may be unaligned. */ |
| HOWTO (R_PPC64_UADDR32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_UADDR32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16, but may be unaligned. */ |
| HOWTO (R_PPC64_UADDR16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_UADDR16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 32-bit PC relative. */ |
| HOWTO (R_PPC64_REL32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| /* FIXME: Verify. Was complain_overflow_bitfield. */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_REL32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* 32-bit relocation to the symbol's procedure linkage table. */ |
| HOWTO (R_PPC64_PLT32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| FIXME: R_PPC64_PLTREL32 not supported. */ |
| HOWTO (R_PPC64_PLTREL32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_PLTREL32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_PLT16_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_PLT16_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_PLT16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16-bit section relative relocation. */ |
| HOWTO (R_PPC64_SECTOFF, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_sectoff_reloc, /* special_function */ |
| "R_PPC64_SECTOFF", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_SECTOFF, but no overflow warning. */ |
| HOWTO (R_PPC64_SECTOFF_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_sectoff_reloc, /* special_function */ |
| "R_PPC64_SECTOFF_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16-bit upper half section relative relocation. */ |
| HOWTO (R_PPC64_SECTOFF_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_sectoff_reloc, /* special_function */ |
| "R_PPC64_SECTOFF_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16-bit upper half adjusted section relative relocation. */ |
| HOWTO (R_PPC64_SECTOFF_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_sectoff_ha_reloc, /* special_function */ |
| "R_PPC64_SECTOFF_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_REL24 without touching the two least significant bits. */ |
| HOWTO (R_PPC64_REL30, /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 30, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_REL30", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffffffc, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ |
| |
| /* A standard 64-bit relocation. */ |
| HOWTO (R_PPC64_ADDR64, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* The bits 32-47 of an address. */ |
| HOWTO (R_PPC64_ADDR16_HIGHER, /* type */ |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HIGHER", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* The bits 32-47 of an address, plus 1 if the contents of the low |
| 16 bits, treated as a signed number, is negative. */ |
| HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */ |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_ha_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HIGHERA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* The bits 48-63 of an address. */ |
| HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */ |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HIGHEST", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* The bits 48-63 of an address, plus 1 if the contents of the low |
| 16 bits, treated as a signed number, is negative. */ |
| HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */ |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_ha_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HIGHESTA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like ADDR64, but may be unaligned. */ |
| HOWTO (R_PPC64_UADDR64, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_UADDR64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 64-bit relative relocation. */ |
| HOWTO (R_PPC64_REL64, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_REL64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* 64-bit relocation to the symbol's procedure linkage table. */ |
| HOWTO (R_PPC64_PLT64, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 64-bit PC relative relocation to the symbol's procedure linkage |
| table. */ |
| /* FIXME: R_PPC64_PLTREL64 not supported. */ |
| HOWTO (R_PPC64_PLTREL64, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTREL64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* 16 bit TOC-relative relocation. */ |
| |
| /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ |
| HOWTO (R_PPC64_TOC16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_toc_reloc, /* special_function */ |
| "R_PPC64_TOC16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16 bit TOC-relative relocation without overflow. */ |
| |
| /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ |
| HOWTO (R_PPC64_TOC16_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_toc_reloc, /* special_function */ |
| "R_PPC64_TOC16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16 bit TOC-relative relocation, high 16 bits. */ |
| |
| /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ |
| HOWTO (R_PPC64_TOC16_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_toc_reloc, /* special_function */ |
| "R_PPC64_TOC16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the |
| contents of the low 16 bits, treated as a signed number, is |
| negative. */ |
| |
| /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ |
| HOWTO (R_PPC64_TOC16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_toc_ha_reloc, /* special_function */ |
| "R_PPC64_TOC16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 64-bit relocation; insert value of TOC base (.TOC.). */ |
| |
| /* R_PPC64_TOC 51 doubleword64 .TOC. */ |
| HOWTO (R_PPC64_TOC, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_toc64_reloc, /* special_function */ |
| "R_PPC64_TOC", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_GOT16, but also informs the link editor that the |
| value to relocate may (!) refer to a PLT entry which the link |
| editor (a) may replace with the symbol value. If the link editor |
| is unable to fully resolve the symbol, it may (b) create a PLT |
| entry and store the address to the new PLT entry in the GOT. |
| This permits lazy resolution of function symbols at run time. |
| The link editor may also skip all of this and just (c) emit a |
| R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ |
| /* FIXME: R_PPC64_PLTGOT16 not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLTGOT16, but without overflow. */ |
| /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ |
| /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus |
| 1 if the contents of the low 16 bits, treated as a signed number, |
| is negative. */ |
| /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_ADDR16_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_ADDR16_LO_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_LO_DS",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_GOT16, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_GOT16_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_GOT16_LO_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_PLT16_LO_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_SECTOFF_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_sectoff_reloc, /* special_function */ |
| "R_PPC64_SECTOFF_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_sectoff_reloc, /* special_function */ |
| "R_PPC64_SECTOFF_LO_DS",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_TOC16, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_TOC16_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_toc_reloc, /* special_function */ |
| "R_PPC64_TOC16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_TOC16_LO_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_toc_reloc, /* special_function */ |
| "R_PPC64_TOC16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ |
| /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ |
| /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16_LO_DS",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Marker reloc for TLS. */ |
| HOWTO (R_PPC64_TLS, |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_TLS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Computes the load module index of the load module that contains the |
| definition of its TLS sym. */ |
| HOWTO (R_PPC64_DTPMOD64, |
| 0, /* rightshift */ |
| 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPMOD64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Computes a dtv-relative displacement, the difference between the value |
| of sym+add and the base address of the thread-local storage block that |
| contains the definition of sym, minus 0x8000. */ |
| HOWTO (R_PPC64_DTPREL64, |
| 0, /* rightshift */ |
| 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A 16 bit dtprel reloc. */ |
| HOWTO (R_PPC64_DTPREL16, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16, but no overflow. */ |
| HOWTO (R_PPC64_DTPREL16_LO, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_LO, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_HI, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HIGHER, |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HIGHER", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HIGHERA, |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HIGHERA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HIGHEST, |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HIGHEST", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HIGHESTA, |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HIGHESTA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16, but for insns with a DS field. */ |
| HOWTO (R_PPC64_DTPREL16_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_DS, but no overflow. */ |
| HOWTO (R_PPC64_DTPREL16_LO_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Computes a tp-relative displacement, the difference between the value of |
| sym+add and the value of the thread pointer (r13). */ |
| HOWTO (R_PPC64_TPREL64, |
| 0, /* rightshift */ |
| 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A 16 bit tprel reloc. */ |
| HOWTO (R_PPC64_TPREL16, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16, but no overflow. */ |
| HOWTO (R_PPC64_TPREL16_LO, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_LO, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_HI, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HIGHER, |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HIGHER", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_HIGHER, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HIGHERA, |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HIGHERA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_HIGHER, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HIGHEST, |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HIGHEST", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HIGHESTA, |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HIGHESTA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16, but for insns with a DS field. */ |
| HOWTO (R_PPC64_TPREL16_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_DS, but no overflow. */ |
| HOWTO (R_PPC64_TPREL16_LO_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset |
| to the first entry relative to the TOC base (r2). */ |
| HOWTO (R_PPC64_GOT_TLSGD16, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSGD16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSGD16, but no overflow. */ |
| HOWTO (R_PPC64_GOT_TLSGD16_LO, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSGD16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_GOT_TLSGD16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSGD16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_GOT_TLSGD16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSGD16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| with values (sym+add)@dtpmod and zero, and computes the offset to the |
| first entry relative to the TOC base (r2). */ |
| HOWTO (R_PPC64_GOT_TLSLD16, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSLD16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSLD16, but no overflow. */ |
| HOWTO (R_PPC64_GOT_TLSLD16_LO, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSLD16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_GOT_TLSLD16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSLD16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_GOT_TLSLD16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSLD16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes |
| the offset to the entry relative to the TOC base (r2). */ |
| HOWTO (R_PPC64_GOT_DTPREL16_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_DTPREL16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_DTPREL16_DS, but no overflow. */ |
| HOWTO (R_PPC64_GOT_DTPREL16_LO_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_DTPREL16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_GOT_DTPREL16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_DTPREL16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_GOT_DTPREL16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_DTPREL16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the |
| offset to the entry relative to the TOC base (r2). */ |
| HOWTO (R_PPC64_GOT_TPREL16_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TPREL16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TPREL16_DS, but no overflow. */ |
| HOWTO (R_PPC64_GOT_TPREL16_LO_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TPREL16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_GOT_TPREL16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TPREL16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_GOT_TPREL16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TPREL16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable hierarchy. */ |
| HOWTO (R_PPC64_GNU_VTINHERIT, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| NULL, /* special_function */ |
| "R_PPC64_GNU_VTINHERIT", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable member usage. */ |
| HOWTO (R_PPC64_GNU_VTENTRY, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| NULL, /* special_function */ |
| "R_PPC64_GNU_VTENTRY", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| }; |
| |
| |
| /* Initialize the ppc64_elf_howto_table, so that linear accesses can |
| be done. */ |
| |
| static void |
| ppc_howto_init (void) |
| { |
| unsigned int i, type; |
| |
| for (i = 0; |
| i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]); |
| i++) |
| { |
| type = ppc64_elf_howto_raw[i].type; |
| BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) |
| / sizeof (ppc64_elf_howto_table[0]))); |
| ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; |
| } |
| } |
| |
| static reloc_howto_type * |
| ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| enum elf_ppc64_reloc_type r = R_PPC64_NONE; |
| |
| if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| /* Initialize howto table if needed. */ |
| ppc_howto_init (); |
| |
| switch (code) |
| { |
| default: |
| return NULL; |
| |
| case BFD_RELOC_NONE: r = R_PPC64_NONE; |
| break; |
| case BFD_RELOC_32: r = R_PPC64_ADDR32; |
| break; |
| case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24; |
| break; |
| case BFD_RELOC_16: r = R_PPC64_ADDR16; |
| break; |
| case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO; |
| break; |
| case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI; |
| break; |
| case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA; |
| break; |
| case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14; |
| break; |
| case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN; |
| break; |
| case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN; |
| break; |
| case BFD_RELOC_PPC_B26: r = R_PPC64_REL24; |
| break; |
| case BFD_RELOC_PPC_B16: r = R_PPC64_REL14; |
| break; |
| case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN; |
| break; |
| case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN; |
| break; |
| case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16; |
| break; |
| case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO; |
| break; |
| case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI; |
| break; |
| case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA; |
| break; |
| case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY; |
| break; |
| case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT; |
| break; |
| case BFD_RELOC_32_PCREL: r = R_PPC64_REL32; |
| break; |
| case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32; |
| break; |
| case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32; |
| break; |
| case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO; |
| break; |
| case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI; |
| break; |
| case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA; |
| break; |
| case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF; |
| break; |
| case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO; |
| break; |
| case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI; |
| break; |
| case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA; |
| break; |
| case BFD_RELOC_CTOR: r = R_PPC64_ADDR64; |
| break; |
| case BFD_RELOC_64: r = R_PPC64_ADDR64; |
| break; |
| case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER; |
| break; |
| case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA; |
| break; |
| case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST; |
| break; |
| case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA; |
| break; |
| case BFD_RELOC_64_PCREL: r = R_PPC64_REL64; |
| break; |
| case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64; |
| break; |
| case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64; |
| break; |
| case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16; |
| break; |
| case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO; |
| break; |
| case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI; |
| break; |
| case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA; |
| break; |
| case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA; |
| break; |
| case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS; |
| break; |
| case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS; |
| break; |
| case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS; |
| break; |
| case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS; |
| break; |
| case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS; |
| break; |
| case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS; |
| break; |
| case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64; |
| break; |
| case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16; |
| break; |
| case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO; |
| break; |
| case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI; |
| break; |
| case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA; |
| break; |
| case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64; |
| break; |
| case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16; |
| break; |
| case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO; |
| break; |
| case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI; |
| break; |
| case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA; |
| break; |
| case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA; |
| break; |
| case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS; |
| break; |
| case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS; |
| break; |
| case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI; |
| break; |
| case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA; |
| break; |
| case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS; |
| break; |
| case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS; |
| break; |
| case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI; |
| break; |
| case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA; |
| break; |
| case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT; |
| break; |
| case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY; |
| break; |
| } |
| |
| return ppc64_elf_howto_table[r]; |
| }; |
| |
| static reloc_howto_type * |
| ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *r_name) |
| { |
| unsigned int i; |
| |
| for (i = 0; |
| i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]); |
| i++) |
| if (ppc64_elf_howto_raw[i].name != NULL |
| && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0) |
| return &ppc64_elf_howto_raw[i]; |
| |
| return NULL; |
| } |
| |
| /* Set the howto pointer for a PowerPC ELF reloc. */ |
| |
| static void |
| ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
| Elf_Internal_Rela *dst) |
| { |
| unsigned int type; |
| |
| /* Initialize howto table if needed. */ |
| if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| ppc_howto_init (); |
| |
| type = ELF64_R_TYPE (dst->r_info); |
| if (type >= (sizeof (ppc64_elf_howto_table) |
| / sizeof (ppc64_elf_howto_table[0]))) |
| { |
| (*_bfd_error_handler) (_("%B: invalid relocation type %d"), |
| abfd, (int) type); |
| type = R_PPC64_NONE; |
| } |
| cache_ptr->howto = ppc64_elf_howto_table[type]; |
| } |
| |
| /* Handle the R_PPC64_ADDR16_HA and similar relocs. */ |
| |
| static bfd_reloc_status_type |
| ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **error_message) |
| { |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| /* Adjust the addend for sign extension of the low 16 bits. |
| We won't actually be using the low 16 bits, so trashing them |
| doesn't matter. */ |
| reloc_entry->addend += 0x8000; |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **error_message) |
| { |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| if (strcmp (symbol->section->name, ".opd") == 0 |
| && (symbol->section->owner->flags & DYNAMIC) == 0) |
| { |
| bfd_vma dest = opd_entry_value (symbol->section, |
| symbol->value + reloc_entry->addend, |
| NULL, NULL); |
| if (dest != (bfd_vma) -1) |
| reloc_entry->addend = dest - (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset); |
| } |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **error_message) |
| { |
| long insn; |
| enum elf_ppc64_reloc_type r_type; |
| bfd_size_type octets; |
| /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ |
| bfd_boolean is_power4 = FALSE; |
| |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| octets = reloc_entry->address * bfd_octets_per_byte (abfd); |
| insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); |
| insn &= ~(0x01 << 21); |
| r_type = reloc_entry->howto->type; |
| if (r_type == R_PPC64_ADDR14_BRTAKEN |
| || r_type == R_PPC64_REL14_BRTAKEN) |
| insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
| |
| if (is_power4) |
| { |
| /* Set 'a' bit. This is 0b00010 in BO field for branch |
| on CR(BI) insns (BO == 001at or 011at), and 0b01000 |
| for branch on CTR insns (BO == 1a00t or 1a01t). */ |
| if ((insn & (0x14 << 21)) == (0x04 << 21)) |
| insn |= 0x02 << 21; |
| else if ((insn & (0x14 << 21)) == (0x10 << 21)) |
| insn |= 0x08 << 21; |
| else |
| goto out; |
| } |
| else |
| { |
| bfd_vma target = 0; |
| bfd_vma from; |
| |
| if (!bfd_is_com_section (symbol->section)) |
| target = symbol->value; |
| target += symbol->section->output_section->vma; |
| target += symbol->section->output_offset; |
| target += reloc_entry->addend; |
| |
| from = (reloc_entry->address |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| |
| /* Invert 'y' bit if not the default. */ |
| if ((bfd_signed_vma) (target - from) < 0) |
| insn ^= 0x01 << 21; |
| } |
| bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); |
| out: |
| return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **error_message) |
| { |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| /* Subtract the symbol section base address. */ |
| reloc_entry->addend -= symbol->section->output_section->vma; |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **error_message) |
| { |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| /* Subtract the symbol section base address. */ |
| reloc_entry->addend -= symbol->section->output_section->vma; |
| |
| /* Adjust the addend for sign extension of the low 16 bits. */ |
| reloc_entry->addend += 0x8000; |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **error_message) |
| { |
| bfd_vma TOCstart; |
| |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| if (TOCstart == 0) |
| TOCstart = ppc64_elf_toc (input_section->output_section->owner); |
| |
| /* Subtract the TOC base address. */ |
| reloc_entry->addend -= TOCstart + TOC_BASE_OFF; |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **error_message) |
| { |
| bfd_vma TOCstart; |
| |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| if (TOCstart == 0) |
| TOCstart = ppc64_elf_toc (input_section->output_section->owner); |
| |
| /* Subtract the TOC base address. */ |
| reloc_entry->addend -= TOCstart + TOC_BASE_OFF; |
| |
| /* Adjust the addend for sign extension of the low 16 bits. */ |
| reloc_entry->addend += 0x8000; |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **error_message) |
| { |
| bfd_vma TOCstart; |
| bfd_size_type octets; |
| |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| if (TOCstart == 0) |
| TOCstart = ppc64_elf_toc (input_section->output_section->owner); |
| |
| octets = reloc_entry->address * bfd_octets_per_byte (abfd); |
| bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets); |
| return bfd_reloc_ok; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **error_message) |
| { |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| if (error_message != NULL) |
| { |
| static char buf[60]; |
| sprintf (buf, "generic linker can't handle %s", |
| reloc_entry->howto->name); |
| *error_message = buf; |
| } |
| return bfd_reloc_dangerous; |
| } |
| |
| struct ppc64_elf_obj_tdata |
| { |
| struct elf_obj_tdata elf; |
| |
| /* Shortcuts to dynamic linker sections. */ |
| asection *got; |
| asection *relgot; |
| |
| /* Used during garbage collection. We attach global symbols defined |
| on removed .opd entries to this section so that the sym is removed. */ |
| asection *deleted_section; |
| |
| /* TLS local dynamic got entry handling. Suppose for multiple GOT |
| sections means we potentially need one of these for each input bfd. */ |
| union { |
| bfd_signed_vma refcount; |
| bfd_vma offset; |
| } tlsld_got; |
| |
| /* A copy of relocs before they are modified for --emit-relocs. */ |
| Elf_Internal_Rela *opd_relocs; |
| }; |
| |
| #define ppc64_elf_tdata(bfd) \ |
| ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any) |
| |
| #define ppc64_tlsld_got(bfd) \ |
| (&ppc64_elf_tdata (bfd)->tlsld_got) |
| |
| /* Override the generic function because we store some extras. */ |
| |
| static bfd_boolean |
| ppc64_elf_mkobject (bfd *abfd) |
| { |
| if (abfd->tdata.any == NULL) |
| { |
| bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata); |
| abfd->tdata.any = bfd_zalloc (abfd, amt); |
| if (abfd->tdata.any == NULL) |
| return FALSE; |
| } |
| return bfd_elf_mkobject (abfd); |
| } |
| |
| /* Return 1 if target is one of ours. */ |
| |
| static bfd_boolean |
| is_ppc64_elf_target (const struct bfd_target *targ) |
| { |
| extern const bfd_target bfd_elf64_powerpc_vec; |
| extern const bfd_target bfd_elf64_powerpcle_vec; |
| |
| return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec; |
| } |
| |
| /* Fix bad default arch selected for a 64 bit input bfd when the |
| default is 32 bit. */ |
| |
| static bfd_boolean |
| ppc64_elf_object_p (bfd *abfd) |
| { |
| if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32) |
| { |
| Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); |
| |
| if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64) |
| { |
| /* Relies on arch after 32 bit default being 64 bit default. */ |
| abfd->arch_info = abfd->arch_info->next; |
| BFD_ASSERT (abfd->arch_info->bits_per_word == 64); |
| } |
| } |
| return TRUE; |
| } |
| |
| /* Support for core dump NOTE sections. */ |
| |
| static bfd_boolean |
| ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| { |
| size_t offset, size; |
| |
| if (note->descsz != 504) |
| return FALSE; |
| |
| /* pr_cursig */ |
| elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); |
| |
| /* pr_pid */ |
| elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32); |
| |
| /* pr_reg */ |
| offset = 112; |
| size = 384; |
| |
| /* Make a ".reg/999" section. */ |
| return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| size, note->descpos + offset); |
| } |
| |
| static bfd_boolean |
| ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| { |
| if (note->descsz != 136) |
| return FALSE; |
| |
| elf_tdata (abfd)->core_program |
| = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
| elf_tdata (abfd)->core_command |
| = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
| |
| return TRUE; |
| } |
| |
| static char * |
| ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, |
| ...) |
| { |
| switch (note_type) |
| { |
| default: |
| return NULL; |
| |
| case NT_PRPSINFO: |
| { |
| char data[136]; |
| va_list ap; |
| |
| va_start (ap, note_type); |
| memset (data, 0, 40); |
| strncpy (data + 40, va_arg (ap, const char *), 16); |
| strncpy (data + 56, va_arg (ap, const char *), 80); |
| va_end (ap); |
| return elfcore_write_note (abfd, buf, bufsiz, |
| "CORE", note_type, data, sizeof (data)); |
| } |
| |
| case NT_PRSTATUS: |
| { |
| char data[504]; |
| va_list ap; |
| long pid; |
| int cursig; |
| const void *greg; |
| |
| va_start (ap, note_type); |
| memset (data, 0, 112); |
| pid = va_arg (ap, long); |
| bfd_put_32 (abfd, pid, data + 32); |
| cursig = va_arg (ap, int); |
| bfd_put_16 (abfd, cursig, data + 12); |
| greg = va_arg (ap, const void *); |
| memcpy (data + 112, greg, 384); |
| memset (data + 496, 0, 8); |
| va_end (ap); |
| return elfcore_write_note (abfd, buf, bufsiz, |
| "CORE", note_type, data, sizeof (data)); |
| } |
| } |
| } |
| |
| /* Merge backend specific data from an object file to the output |
| object file when linking. */ |
| |
| static bfd_boolean |
| ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| { |
| /* Check if we have the same endianess. */ |
| if (ibfd->xvec->byteorder != obfd->xvec->byteorder |
| && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN |
| && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) |
| { |
| const char *msg; |
| |
| if (bfd_big_endian (ibfd)) |
| msg = _("%B: compiled for a big endian system " |
| "and target is little endian"); |
| else |
| msg = _("%B: compiled for a little endian system " |
| "and target is big endian"); |
| |
| (*_bfd_error_handler) (msg, ibfd); |
| |
| bfd_set_error (bfd_error_wrong_format); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| /* Add extra PPC sections. */ |
| |
| static const struct bfd_elf_special_section ppc64_elf_special_sections[]= |
| { |
| { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 }, |
| { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
| { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
| { NULL, 0, 0, 0, 0 } |
| }; |
| |
| enum _ppc64_sec_type { |
| sec_normal = 0, |
| sec_opd = 1, |
| sec_toc = 2 |
| }; |
| |
| struct _ppc64_elf_section_data |
| { |
| struct bfd_elf_section_data elf; |
| |
| /* An array with one entry for each opd function descriptor. */ |
| union |
| { |
| /* Points to the function code section for local opd entries. */ |
| asection **opd_func_sec; |
| /* After editing .opd, adjust references to opd local syms. */ |
| long *opd_adjust; |
| |
| /* An array for toc sections, indexed by offset/8. |
| Specifies the relocation symbol index used at a given toc offset. */ |
| unsigned *t_symndx; |
| } u; |
| |
| enum _ppc64_sec_type sec_type:2; |
| |
| /* Flag set when small branches are detected. Used to |
| select suitable defaults for the stub group size. */ |
| unsigned int has_14bit_branch:1; |
| }; |
| |
| #define ppc64_elf_section_data(sec) \ |
| ((struct _ppc64_elf_section_data *) elf_section_data (sec)) |
| |
| static bfd_boolean |
| ppc64_elf_new_section_hook (bfd *abfd, asection *sec) |
| { |
| if (!sec->used_by_bfd) |
| { |
| struct _ppc64_elf_section_data *sdata; |
| bfd_size_type amt = sizeof (*sdata); |
| |
| sdata = bfd_zalloc (abfd, amt); |
| if (sdata == NULL) |
| return FALSE; |
| sec->used_by_bfd = sdata; |
| } |
| |
| return _bfd_elf_new_section_hook (abfd, sec); |
| } |
| |
| static void * |
| get_opd_info (asection * sec) |
| { |
| if (sec != NULL |
| && ppc64_elf_section_data (sec) != NULL |
| && ppc64_elf_section_data (sec)->sec_type == sec_opd) |
| return ppc64_elf_section_data (sec)->u.opd_adjust; |
| return NULL; |
| } |
| |
| /* Parameters for the qsort hook. */ |
| static asection *synthetic_opd; |
| static bfd_boolean synthetic_relocatable; |
| |
| /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */ |
| |
| static int |
| compare_symbols (const void *ap, const void *bp) |
| { |
| const asymbol *a = * (const asymbol **) ap; |
| const asymbol *b = * (const asymbol **) bp; |
| |
| /* Section symbols first. */ |
| if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM)) |
| return -1; |
| if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM)) |
| return 1; |
| |
| /* then .opd symbols. */ |
| if (a->section == synthetic_opd && b->section != synthetic_opd) |
| return -1; |
| if (a->section != synthetic_opd && b->section == synthetic_opd) |
| return 1; |
| |
| /* then other code symbols. */ |
| if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
| == (SEC_CODE | SEC_ALLOC) |
| && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
| != (SEC_CODE | SEC_ALLOC)) |
| return -1; |
| |
| if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
| != (SEC_CODE | SEC_ALLOC) |
| && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
| == (SEC_CODE | SEC_ALLOC)) |
| return 1; |
| |
| if (synthetic_relocatable) |
| { |
| if (a->section->id < b->section->id) |
| return -1; |
| |
| if (a->section->id > b->section->id) |
| return 1; |
| } |
| |
| if (a->value + a->section->vma < b->value + b->section->vma) |
| return -1; |
| |
| if (a->value + a->section->vma > b->value + b->section->vma) |
| return 1; |
| |
| /* For syms with the same value, prefer strong dynamic global function |
| syms over other syms. */ |
| if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0) |
| return -1; |
| |
| if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0) |
| return 1; |
| |
| if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0) |
| return -1; |
| |
| if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0) |
| return 1; |
| |
| if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0) |
| return -1; |
| |
| if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0) |
| return 1; |
| |
| if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0) |
| return -1; |
| |
| if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* Search SYMS for a symbol of the given VALUE. */ |
| |
| static asymbol * |
| sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value) |
| { |
| long mid; |
| |
| if (id == -1) |
| { |
| while (lo < hi) |
| { |
| mid = (lo + hi) >> 1; |
| if (syms[mid]->value + syms[mid]->section->vma < value) |
| lo = mid + 1; |
| else if (syms[mid]->value + syms[mid]->section->vma > value) |
| hi = mid; |
| else |
| return syms[mid]; |
| } |
| } |
| else |
| { |
| while (lo < hi) |
| { |
| mid = (lo + hi) >> 1; |
| if (syms[mid]->section->id < id) |
| lo = mid + 1; |
| else if (syms[mid]->section->id > id) |
| hi = mid; |
| else if (syms[mid]->value < value) |
| lo = mid + 1; |
| else if (syms[mid]->value > value) |
| hi = mid; |
| else |
| return syms[mid]; |
| } |
| } |
| return NULL; |
| } |
| |
| /* Create synthetic symbols, effectively restoring "dot-symbol" function |
| entry syms. */ |
| |
| static long |
| ppc64_elf_get_synthetic_symtab (bfd *abfd, |
| long static_count, asymbol **static_syms, |
| long dyn_count, asymbol **dyn_syms, |
| asymbol **ret) |
| { |
| asymbol *s; |
| long i; |
| long count; |
| char *names; |
| long symcount, codesecsym, codesecsymend, secsymend, opdsymend; |
| asection *opd; |
| bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0; |
| asymbol **syms; |
| |
| *ret = NULL; |
| |
| opd = bfd_get_section_by_name (abfd, ".opd"); |
| if (opd == NULL) |
| return 0; |
| |
| symcount = static_count; |
| if (!relocatable) |
| symcount += dyn_count; |
| if (symcount == 0) |
| return 0; |
| |
| syms = bfd_malloc ((symcount + 1) * sizeof (*syms)); |
| if (syms == NULL) |
| return -1; |
| |
| if (!relocatable && static_count != 0 && dyn_count != 0) |
| { |
| /* Use both symbol tables. */ |
| memcpy (syms, static_syms, static_count * sizeof (*syms)); |
| memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms)); |
| } |
| else if (!relocatable && static_count == 0) |
| memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms)); |
| else |
| memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms)); |
| |
| synthetic_opd = opd; |
| synthetic_relocatable = relocatable; |
| qsort (syms, symcount, sizeof (*syms), compare_symbols); |
| |
| if (!relocatable && symcount > 1) |
| { |
| long j; |
| /* Trim duplicate syms, since we may have merged the normal and |
| dynamic symbols. Actually, we only care about syms that have |
| different values, so trim any with the same value. */ |
| for (i = 1, j = 1; i < symcount; ++i) |
| if (syms[i - 1]->value + syms[i - 1]->section->vma |
| != syms[i]->value + syms[i]->section->vma) |
| syms[j++] = syms[i]; |
| symcount = j; |
| } |
| |
| i = 0; |
| if (syms[i]->section == opd) |
| ++i; |
| codesecsym = i; |
| |
| for (; i < symcount; ++i) |
| if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
| != (SEC_CODE | SEC_ALLOC)) |
| || (syms[i]->flags & BSF_SECTION_SYM) == 0) |
| break; |
| codesecsymend = i; |
| |
| for (; i < symcount; ++i) |
| if ((syms[i]->flags & BSF_SECTION_SYM) == 0) |
| break; |
| secsymend = i; |
| |
| for (; i < symcount; ++i) |
| if (syms[i]->section != opd) |
| break; |
| opdsymend = i; |
| |
| for (; i < symcount; ++i) |
| if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
| != (SEC_CODE | SEC_ALLOC)) |
| break; |
| symcount = i; |
| |
| count = 0; |
| if (opdsymend == secsymend) |
| goto done; |
| |
| if (relocatable) |
| { |
| bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
| arelent *r; |
| size_t size; |
| long relcount; |
| |
| slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
| relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0; |
| if (relcount == 0) |
| goto done; |
| |
| if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE)) |
| { |
| count = -1; |
| goto done; |
| } |
| |
| size = 0; |
| for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) |
| { |
| asymbol *sym; |
| |
| while (r < opd->relocation + relcount |
| && r->address < syms[i]->value + opd->vma) |
| ++r; |
| |
| if (r == opd->relocation + relcount) |
| break; |
| |
| if (r->address != syms[i]->value + opd->vma) |
| continue; |
| |
| if (r->howto->type != R_PPC64_ADDR64) |
| continue; |
| |
| sym = *r->sym_ptr_ptr; |
| if (!sym_exists_at (syms, opdsymend, symcount, |
| sym->section->id, sym->value + r->addend)) |
| { |
| ++count; |
| size += sizeof (asymbol); |
| size += strlen (syms[i]->name) + 2; |
| } |
| } |
| |
| s = *ret = bfd_malloc (size); |
| if (s == NULL) |
| { |
| count = -1; |
| goto done; |
| } |
| |
| names = (char *) (s + count); |
| |
| for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) |
| { |
| asymbol *sym; |
| |
| while (r < opd->relocation + relcount |
| && r->address < syms[i]->value + opd->vma) |
| ++r; |
| |
| if (r == opd->relocation + relcount) |
| break; |
| |
| if (r->address != syms[i]->value + opd->vma) |
| continue; |
| |
| if (r->howto->type != R_PPC64_ADDR64) |
| continue; |
| |
| sym = *r->sym_ptr_ptr; |
| if (!sym_exists_at (syms, opdsymend, symcount, |
| sym->section->id, sym->value + r->addend)) |
| { |
| size_t len; |
| |
| *s = *syms[i]; |
| s->section = sym->section; |
| s->value = sym->value + r->addend; |
| s->name = names; |
| *names++ = '.'; |
| len = strlen (syms[i]->name); |
| memcpy (names, syms[i]->name, len + 1); |
| names += len + 1; |
| s++; |
| } |
| } |
| } |
| else |
| { |
| bfd_byte *contents; |
| size_t size; |
| |
| if (!bfd_malloc_and_get_section (abfd, opd, &contents)) |
| { |
| if (contents) |
| { |
| free_contents_and_exit: |
| free (contents); |
| } |
| count = -1; |
| goto done; |
| } |
| |
| size = 0; |
| for (i = secsymend; i < opdsymend; ++i) |
| { |
| bfd_vma ent; |
| |
| ent = bfd_get_64 (abfd, contents + syms[i]->value); |
| if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) |
| { |
| ++count; |
| size += sizeof (asymbol); |
| size += strlen (syms[i]->name) + 2; |
| } |
| } |
| |
| s = *ret = bfd_malloc (size); |
| if (s == NULL) |
| goto free_contents_and_exit; |
| |
| names = (char *) (s + count); |
| |
| for (i = secsymend; i < opdsymend; ++i) |
| { |
| bfd_vma ent; |
| |
| ent = bfd_get_64 (abfd, contents + syms[i]->value); |
| if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) |
| { |
| long lo, hi; |
| size_t len; |
| asection *sec = abfd->sections; |
| |
| *s = *syms[i]; |
| lo = codesecsym; |
| hi = codesecsymend; |
| while (lo < hi) |
| { |
| long mid = (lo + hi) >> 1; |
| if (syms[mid]->section->vma < ent) |
| lo = mid + 1; |
| else if (syms[mid]->section->vma > ent) |
| hi = mid; |
| else |
| { |
| sec = syms[mid]->section; |
| break; |
| } |
| } |
| |
| if (lo >= hi && lo > codesecsym) |
| sec = syms[lo - 1]->section; |
| |
| for (; sec != NULL; sec = sec->next) |
| { |
| if (sec->vma > ent) |
| break; |
| if ((sec->flags & SEC_ALLOC) == 0 |
| || (sec->flags & SEC_LOAD) == 0) |
| break; |
| if ((sec->flags & SEC_CODE) != 0) |
| s->section = sec; |
| } |
| s->value = ent - s->section->vma; |
| s->name = names; |
| *names++ = '.'; |
| len = strlen (syms[i]->name); |
| memcpy (names, syms[i]->name, len + 1); |
| names += len + 1; |
| s++; |
| } |
| } |
| free (contents); |
| } |
| |
| done: |
| free (syms); |
| return count; |
| } |
| |
| /* The following functions are specific to the ELF linker, while |
| functions above are used generally. Those named ppc64_elf_* are |
| called by the main ELF linker code. They appear in this file more |
| or less in the order in which they are called. eg. |
| ppc64_elf_check_relocs is called early in the link process, |
| ppc64_elf_finish_dynamic_sections is one of the last functions |
| called. |
| |
| PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that |
| functions have both a function code symbol and a function descriptor |
| symbol. A call to foo in a relocatable object file looks like: |
| |
| . .text |
| . x: |
| . bl .foo |
| . nop |
| |
| The function definition in another object file might be: |
| |
| . .section .opd |
| . foo: .quad .foo |
| . .quad .TOC.@tocbase |
| . .quad 0 |
| . |
| . .text |
| . .foo: blr |
| |
| When the linker resolves the call during a static link, the branch |
| unsurprisingly just goes to .foo and the .opd information is unused. |
| If the function definition is in a shared library, things are a little |
| different: The call goes via a plt call stub, the opd information gets |
| copied to the plt, and the linker patches the nop. |
| |
| . x: |
| . bl .foo_stub |
| . ld 2,40(1) |
| . |
| . |
| . .foo_stub: |
| . addis 12,2,Lfoo@toc@ha # in practice, the call stub |
| . addi 12,12,Lfoo@toc@l # is slightly optimized, but |
| . std 2,40(1) # this is the general idea |
| . ld 11,0(12) |
| . ld 2,8(12) |
| . mtctr 11 |
| . ld 11,16(12) |
| . bctr |
| . |
| . .section .plt |
| . Lfoo: reloc (R_PPC64_JMP_SLOT, foo) |
| |
| The "reloc ()" notation is supposed to indicate that the linker emits |
| an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd |
| copying. |
| |
| What are the difficulties here? Well, firstly, the relocations |
| examined by the linker in check_relocs are against the function code |
| sym .foo, while the dynamic relocation in the plt is emitted against |
| the function descriptor symbol, foo. Somewhere along the line, we need |
| to carefully copy dynamic link information from one symbol to the other. |
| Secondly, the generic part of the elf linker will make .foo a dynamic |
| symbol as is normal for most other backends. We need foo dynamic |
| instead, at least for an application final link. However, when |
| creating a shared library containing foo, we need to have both symbols |
| dynamic so that references to .foo are satisfied during the early |
| stages of linking. Otherwise the linker might decide to pull in a |
| definition from some other object, eg. a static library. |
| |
| Update: As of August 2004, we support a new convention. Function |
| calls may use the function descriptor symbol, ie. "bl foo". This |
| behaves exactly as "bl .foo". */ |
| |
| /* The linker needs to keep track of the number of relocs that it |
| decides to copy as dynamic relocs in check_relocs for each symbol. |
| This is so that it can later discard them if they are found to be |
| unnecessary. We store the information in a field extending the |
| regular ELF linker hash table. */ |
| |
| struct ppc_dyn_relocs |
| { |
| struct ppc_dyn_relocs *next; |
| |
| /* The input section of the reloc. */ |
| asection *sec; |
| |
| /* Total number of relocs copied for the input section. */ |
| bfd_size_type count; |
| |
| /* Number of pc-relative relocs copied for the input section. */ |
| bfd_size_type pc_count; |
| }; |
| |
| /* Track GOT entries needed for a given symbol. We might need more |
| than one got entry per symbol. */ |
| struct got_entry |
| { |
| struct got_entry *next; |
| |
| /* The symbol addend that we'll be placing in the GOT. */ |
| bfd_vma addend; |
| |
| /* Unlike other ELF targets, we use separate GOT entries for the same |
| symbol referenced from different input files. This is to support |
| automatic multiple TOC/GOT sections, where the TOC base can vary |
| from one input file to another. |
| |
| Point to the BFD owning this GOT entry. */ |
| bfd *owner; |
| |
| /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD, |
| TLS_TPREL or TLS_DTPREL for tls entries. */ |
| char tls_type; |
| |
| /* Reference count until size_dynamic_sections, GOT offset thereafter. */ |
| union |
| { |
| bfd_signed_vma refcount; |
| bfd_vma offset; |
| } got; |
| }; |
| |
| /* The same for PLT. */ |
| struct plt_entry |
| { |
| struct plt_entry *next; |
| |
| bfd_vma addend; |
| |
| union |
| { |
| bfd_signed_vma refcount; |
| bfd_vma offset; |
| } plt; |
| }; |
| |
| /* Of those relocs that might be copied as dynamic relocs, this macro |
| selects those that must be copied when linking a shared library, |
| even when the symbol is local. */ |
| |
| #define MUST_BE_DYN_RELOC(RTYPE) \ |
| ((RTYPE) != R_PPC64_REL32 \ |
| && (RTYPE) != R_PPC64_REL64 \ |
| && (RTYPE) != R_PPC64_REL30) |
| |
| /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
| copying dynamic variables from a shared lib into an app's dynbss |
| section, and instead use a dynamic relocation to point into the |
| shared lib. With code that gcc generates, it's vital that this be |
| enabled; In the PowerPC64 ABI, the address of a function is actually |
| the address of a function descriptor, which resides in the .opd |
| section. gcc uses the descriptor directly rather than going via the |
| GOT as some other ABI's do, which means that initialized function |
| pointers must reference the descriptor. Thus, a function pointer |
| initialized to the address of a function in a shared library will |
| either require a copy reloc, or a dynamic reloc. Using a copy reloc |
| redefines the function descriptor symbol to point to the copy. This |
| presents a problem as a plt entry for that function is also |
| initialized from the function descriptor symbol and the copy reloc |
| may not be initialized first. */ |
| #define ELIMINATE_COPY_RELOCS 1 |
| |
| /* Section name for stubs is the associated section name plus this |
| string. */ |
| #define STUB_SUFFIX ".stub" |
| |
| /* Linker stubs. |
| ppc_stub_long_branch: |
| Used when a 14 bit branch (or even a 24 bit branch) can't reach its |
| destination, but a 24 bit branch in a stub section will reach. |
| . b dest |
| |
| ppc_stub_plt_branch: |
| Similar to the above, but a 24 bit branch in the stub section won't |
| reach its destination. |
| . addis %r12,%r2,xxx@toc@ha |
| . ld %r11,xxx@toc@l(%r12) |
| . mtctr %r11 |
| . bctr |
| |
| ppc_stub_plt_call: |
| Used to call a function in a shared library. If it so happens that |
| the plt entry referenced crosses a 64k boundary, then an extra |
| "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr". |
| . addis %r12,%r2,xxx@toc@ha |
| . std %r2,40(%r1) |
| . ld %r11,xxx+0@toc@l(%r12) |
| . mtctr %r11 |
| . ld %r2,xxx+8@toc@l(%r12) |
| . ld %r11,xxx+16@toc@l(%r12) |
| . bctr |
| |
| ppc_stub_long_branch and ppc_stub_plt_branch may also have additional |
| code to adjust the value and save r2 to support multiple toc sections. |
| A ppc_stub_long_branch with an r2 offset looks like: |
| . std %r2,40(%r1) |
| . addis %r2,%r2,off@ha |
| . addi %r2,%r2,off@l |
| . b dest |
| |
| A ppc_stub_plt_branch with an r2 offset looks like: |
| . std %r2,40(%r1) |
| . addis %r12,%r2,xxx@toc@ha |
| . ld %r11,xxx@toc@l(%r12) |
| . addis %r2,%r2,off@ha |
| . addi %r2,%r2,off@l |
| . mtctr %r11 |
| . bctr |
| |
| In cases where the "addis" instruction would add zero, the "addis" is |
| omitted and following instructions modified slightly in some cases. |
| */ |
| |
| enum ppc_stub_type { |
| ppc_stub_none, |
| ppc_stub_long_branch, |
| ppc_stub_long_branch_r2off, |
| ppc_stub_plt_branch, |
| ppc_stub_plt_branch_r2off, |
| ppc_stub_plt_call |
| }; |
| |
| struct ppc_stub_hash_entry { |
| |
| /* Base hash table entry structure. */ |
| struct bfd_hash_entry root; |
| |
| enum ppc_stub_type stub_type; |
| |
| /* The stub section. */ |
| asection *stub_sec; |
| |
| /* Offset within stub_sec of the beginning of this stub. */ |
| bfd_vma stub_offset; |
| |
| /* Given the symbol's value and its section we can determine its final |
| value when building the stubs (so the stub knows where to jump. */ |
| bfd_vma target_value; |
| asection *target_section; |
| |
| /* The symbol table entry, if any, that this was derived from. */ |
| struct ppc_link_hash_entry *h; |
| |
| /* And the reloc addend that this was derived from. */ |
| bfd_vma addend; |
| |
| /* Where this stub is being called from, or, in the case of combined |
| stub sections, the first input section in the group. */ |
| asection *id_sec; |
| }; |
| |
| struct ppc_branch_hash_entry { |
| |
| /* Base hash table entry structure. */ |
| struct bfd_hash_entry root; |
| |
| /* Offset within branch lookup table. */ |
| unsigned int offset; |
| |
| /* Generation marker. */ |
| unsigned int iter; |
| }; |
| |
| struct ppc_link_hash_entry |
| { |
| struct elf_link_hash_entry elf; |
| |
| union { |
| /* A pointer to the most recently used stub hash entry against this |
| symbol. */ |
| struct ppc_stub_hash_entry *stub_cache; |
| |
| /* A pointer to the next symbol starting with a '.' */ |
| struct ppc_link_hash_entry *next_dot_sym; |
| } u; |
| |
| /* Track dynamic relocs copied for this symbol. */ |
| struct ppc_dyn_relocs *dyn_relocs; |
| |
| /* Link between function code and descriptor symbols. */ |
| struct ppc_link_hash_entry *oh; |
| |
| /* Flag function code and descriptor symbols. */ |
| unsigned int is_func:1; |
| unsigned int is_func_descriptor:1; |
| unsigned int fake:1; |
| |
| /* Whether global opd/toc sym has been adjusted or not. |
| After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag |
| should be set for all globals defined in any opd/toc section. */ |
| unsigned int adjust_done:1; |
| |
| /* Set if we twiddled this symbol to weak at some stage. */ |
| unsigned int was_undefined:1; |
| |
| /* Contexts in which symbol is used in the GOT (or TOC). |
| TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the |
| corresponding relocs are encountered during check_relocs. |
| tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to |
| indicate the corresponding GOT entry type is not needed. |
| tls_optimize may also set TLS_TPRELGD when a GD reloc turns into |
| a TPREL one. We use a separate flag rather than setting TPREL |
| just for convenience in distinguishing the two cases. */ |
| #define TLS_GD 1 /* GD reloc. */ |
| #define TLS_LD 2 /* LD reloc. */ |
| #define TLS_TPREL 4 /* TPREL reloc, => IE. */ |
| #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ |
| #define TLS_TLS 16 /* Any TLS reloc. */ |
| #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */ |
| #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */ |
| char tls_mask; |
| }; |
| |
| /* ppc64 ELF linker hash table. */ |
| |
| struct ppc_link_hash_table |
| { |
| struct elf_link_hash_table elf; |
| |
| /* The stub hash table. */ |
| struct bfd_hash_table stub_hash_table; |
| |
| /* Another hash table for plt_branch stubs. */ |
| struct bfd_hash_table branch_hash_table; |
| |
| /* Linker stub bfd. */ |
| bfd *stub_bfd; |
| |
| /* Linker call-backs. */ |
| asection * (*add_stub_section) (const char *, asection *); |
| void (*layout_sections_again) (void); |
| |
| /* Array to keep track of which stub sections have been created, and |
| information on stub grouping. */ |
| struct map_stub { |
| /* This is the section to which stubs in the group will be attached. */ |
| asection *link_sec; |
| /* The stub section. */ |
| asection *stub_sec; |
| /* Along with elf_gp, specifies the TOC pointer used in this group. */ |
| bfd_vma toc_off; |
| } *stub_group; |
| |
| /* Temp used when calculating TOC pointers. */ |
| bfd_vma toc_curr; |
| |
| /* Highest input section id. */ |
| int top_id; |
| |
| /* Highest output section index. */ |
| int top_index; |
| |
| /* Used when adding symbols. */ |
| struct ppc_link_hash_entry *dot_syms; |
| |
| /* List of input sections for each output section. */ |
| asection **input_list; |
| |
| /* Short-cuts to get to dynamic linker sections. */ |
| asection *got; |
| asection *plt; |
| asection *relplt; |
| asection *dynbss; |
| asection *relbss; |
| asection *glink; |
| asection *sfpr; |
| asection *brlt; |
| asection *relbrlt; |
| |
| /* Shortcut to .__tls_get_addr and __tls_get_addr. */ |
| struct ppc_link_hash_entry *tls_get_addr; |
| struct ppc_link_hash_entry *tls_get_addr_fd; |
| |
| /* Statistics. */ |
| unsigned long stub_count[ppc_stub_plt_call]; |
| |
| /* Number of stubs against global syms. */ |
| unsigned long stub_globals; |
| |
| /* Set if we should emit symbols for stubs. */ |
| unsigned int emit_stub_syms:1; |
| |
| /* Support for multiple toc sections. */ |
| unsigned int no_multi_toc:1; |
| unsigned int multi_toc_needed:1; |
| |
| /* Set on error. */ |
| unsigned int stub_error:1; |
| |
| /* Temp used by ppc64_elf_check_directives. */ |
| unsigned int twiddled_syms:1; |
| |
| /* Incremented every time we size stubs. */ |
| unsigned int stub_iteration; |
| |
| /* Small local sym to section mapping cache. */ |
| struct sym_sec_cache sym_sec; |
| }; |
| |
| /* Rename some of the generic section flags to better document how they |
| are used here. */ |
| #define has_toc_reloc has_gp_reloc |
| #define makes_toc_func_call need_finalize_relax |
| #define call_check_in_progress reloc_done |
| |
| /* Get the ppc64 ELF linker hash table from a link_info structure. */ |
| |
| #define ppc_hash_table(p) \ |
| ((struct ppc_link_hash_table *) ((p)->hash)) |
| |
| #define ppc_stub_hash_lookup(table, string, create, copy) \ |
| ((struct ppc_stub_hash_entry *) \ |
| bfd_hash_lookup ((table), (string), (create), (copy))) |
| |
| #define ppc_branch_hash_lookup(table, string, create, copy) \ |
| ((struct ppc_branch_hash_entry *) \ |
| bfd_hash_lookup ((table), (string), (create), (copy))) |
| |
| /* Create an entry in the stub hash table. */ |
| |
| static struct bfd_hash_entry * |
| stub_hash_newfunc (struct bfd_hash_entry *entry, |
| struct bfd_hash_table *table, |
| const char *string) |
| { |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (entry == NULL) |
| { |
| entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry)); |
| if (entry == NULL) |
| return entry; |
| } |
| |
| /* Call the allocation method of the superclass. */ |
| entry = bfd_hash_newfunc (entry, table, string); |
| if (entry != NULL) |
| { |
| struct ppc_stub_hash_entry *eh; |
| |
| /* Initialize the local fields. */ |
| eh = (struct ppc_stub_hash_entry *) entry; |
| eh->stub_type = ppc_stub_none; |
| eh->stub_sec = NULL; |
| eh->stub_offset = 0; |
| eh->target_value = 0; |
| eh->target_section = NULL; |
| eh->h = NULL; |
| eh->id_sec = NULL; |
| } |
| |
| return entry; |
| } |
| |
| /* Create an entry in the branch hash table. */ |
| |
| static struct bfd_hash_entry * |
| branch_hash_newfunc (struct bfd_hash_entry *entry, |
| struct bfd_hash_table *table, |
| const char *string) |
| { |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (entry == NULL) |
| { |
| entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry)); |
| if (entry == NULL) |
| return entry; |
| } |
| |
| /* Call the allocation method of the superclass. */ |
| entry = bfd_hash_newfunc (entry, table, string); |
| if (entry != NULL) |
| { |
| struct ppc_branch_hash_entry *eh; |
| |
| /* Initialize the local fields. */ |
| eh = (struct ppc_branch_hash_entry *) entry; |
| eh->offset = 0; |
| eh->iter = 0; |
| } |
| |
| return entry; |
| } |
| |
| /* Create an entry in a ppc64 ELF linker hash table. */ |
| |
| static struct bfd_hash_entry * |
| link_hash_newfunc (struct bfd_hash_entry *entry, |
| struct bfd_hash_table *table, |
| const char *string) |
| { |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (entry == NULL) |
| { |
| entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry)); |
| if (entry == NULL) |
| return entry; |
| } |
| |
| /* Call the allocation method of the superclass. */ |
| entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| if (entry != NULL) |
| { |
| struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry; |
| |
| memset (&eh->u.stub_cache, 0, |
| (sizeof (struct ppc_link_hash_entry) |
| - offsetof (struct ppc_link_hash_entry, u.stub_cache))); |
| |
| /* When making function calls, old ABI code references function entry |
| points (dot symbols), while new ABI code references the function |
| descriptor symbol. We need to make any combination of reference and |
| definition work together, without breaking archive linking. |
| |
| For a defined function "foo" and an undefined call to "bar": |
| An old object defines "foo" and ".foo", references ".bar" (possibly |
| "bar" too). |
| A new object defines "foo" and references "bar". |
| |
| A new object thus has no problem with its undefined symbols being |
| satisfied by definitions in an old object. On the other hand, the |
| old object won't have ".bar" satisfied by a new object. |
| |
| Keep a list of newly added dot-symbols. */ |
| |
| if (string[0] == '.') |
| { |
| struct ppc_link_hash_table *htab; |
| |
| htab = (struct ppc_link_hash_table *) table; |
| eh->u.next_dot_sym = htab->dot_syms; |
| htab->dot_syms = eh; |
| } |
| } |
| |
| return entry; |
| } |
| |
| /* Create a ppc64 ELF linker hash table. */ |
| |
| static struct bfd_link_hash_table * |
| ppc64_elf_link_hash_table_create (bfd *abfd) |
| { |
| struct ppc_link_hash_table *htab; |
| bfd_size_type amt = sizeof (struct ppc_link_hash_table); |
| |
| htab = bfd_zmalloc (amt); |
| if (htab == NULL) |
| return NULL; |
| |
| if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc, |
| sizeof (struct ppc_link_hash_entry))) |
| { |
| free (htab); |
| return NULL; |
| } |
| |
| /* Init the stub hash table too. */ |
| if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc, |
| sizeof (struct ppc_stub_hash_entry))) |
| return NULL; |
| |
| /* And the branch hash table. */ |
| if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc, |
| sizeof (struct ppc_branch_hash_entry))) |
| return NULL; |
| |
| /* Initializing two fields of the union is just cosmetic. We really |
| only care about glist, but when compiled on a 32-bit host the |
| bfd_vma fields are larger. Setting the bfd_vma to zero makes |
| debugger inspection of these fields look nicer. */ |
| htab->elf.init_got_refcount.refcount = 0; |
| htab->elf.init_got_refcount.glist = NULL; |
| htab->elf.init_plt_refcount.refcount = 0; |
| htab->elf.init_plt_refcount.glist = NULL; |
| htab->elf.init_got_offset.offset = 0; |
| htab->elf.init_got_offset.glist = NULL; |
| htab->elf.init_plt_offset.offset = 0; |
| htab->elf.init_plt_offset.glist = NULL; |
| |
| return &htab->elf.root; |
| } |
| |
| /* Free the derived linker hash table. */ |
| |
| static void |
| ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash) |
| { |
| struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash; |
| |
| bfd_hash_table_free (&ret->stub_hash_table); |
| bfd_hash_table_free (&ret->branch_hash_table); |
| _bfd_generic_link_hash_table_free (hash); |
| } |
| |
| /* Satisfy the ELF linker by filling in some fields in our fake bfd. */ |
| |
| void |
| ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info) |
| { |
| struct ppc_link_hash_table *htab; |
| |
| elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64; |
| |
| /* Always hook our dynamic sections into the first bfd, which is the |
| linker created stub bfd. This ensures that the GOT header is at |
| the start of the output TOC section. */ |
| htab = ppc_hash_table (info); |
| htab->stub_bfd = abfd; |
| htab->elf.dynobj = abfd; |
| } |
| |
| /* Build a name for an entry in the stub hash table. */ |
| |
| static char * |
| ppc_stub_name (const asection *input_section, |
| const asection *sym_sec, |
| const struct ppc_link_hash_entry *h, |
| const Elf_Internal_Rela *rel) |
| { |
| char *stub_name; |
| bfd_size_type len; |
| |
| /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31 |
| offsets from a sym as a branch target? In fact, we could |
| probably assume the addend is always zero. */ |
| BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend); |
| |
| if (h) |
| { |
| len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1; |
| stub_name = bfd_malloc (len); |
| if (stub_name == NULL) |
| return stub_name; |
| |
| sprintf (stub_name, "%08x.%s+%x", |
| input_section->id & 0xffffffff, |
| h->elf.root.root.string, |
| (int) rel->r_addend & 0xffffffff); |
| } |
| else |
| { |
| len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; |
| stub_name = bfd_malloc (len); |
| if (stub_name == NULL) |
| return stub_name; |
| |
| sprintf (stub_name, "%08x.%x:%x+%x", |
| input_section->id & 0xffffffff, |
| sym_sec->id & 0xffffffff, |
| (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, |
| (int) rel->r_addend & 0xffffffff); |
| } |
| if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0') |
| stub_name[len - 2] = 0; |
| return stub_name; |
| } |
| |
| /* Look up an entry in the stub hash. Stub entries are cached because |
| creating the stub name takes a bit of time. */ |
| |
| static struct ppc_stub_hash_entry * |
| ppc_get_stub_entry (const asection *input_section, |
| const asection *sym_sec, |
| struct ppc_link_hash_entry *h, |
| const Elf_Internal_Rela *rel, |
| struct ppc_link_hash_table *htab) |
| { |
| struct ppc_stub_hash_entry *stub_entry; |
| const asection *id_sec; |
| |
| /* If this input section is part of a group of sections sharing one |
| stub section, then use the id of the first section in the group. |
| Stub names need to include a section id, as there may well be |
| more than one stub used to reach say, printf, and we need to |
| distinguish between them. */ |
| id_sec = htab->stub_group[input_section->id].link_sec; |
| |
| if (h != NULL && h->u.stub_cache != NULL |
| && h->u.stub_cache->h == h |
| && h->u.stub_cache->id_sec == id_sec) |
| { |
| stub_entry = h->u.stub_cache; |
| } |
| else |
| { |
| char *stub_name; |
| |
| stub_name = ppc_stub_name (id_sec, sym_sec, h, rel); |
| if (stub_name == NULL) |
| return NULL; |
| |
| stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, |
| stub_name, FALSE, FALSE); |
| if (h != NULL) |
| h->u.stub_cache = stub_entry; |
| |
| free (stub_name); |
| } |
| |
| return stub_entry; |
| } |
| |
| /* Add a new stub entry to the stub hash. Not all fields of the new |
| stub entry are initialised. */ |
| |
| static struct ppc_stub_hash_entry * |
| ppc_add_stub (const char *stub_name, |
| asection *section, |
| struct ppc_link_hash_table *htab) |
| { |
| asection *link_sec; |
| asection *stub_sec; |
| struct ppc_stub_hash_entry *stub_entry; |
| |
| link_sec = htab->stub_group[section->id].link_sec; |
| stub_sec = htab->stub_group[section->id].stub_sec; |
| if (stub_sec == NULL) |
| { |
| stub_sec = htab->stub_group[link_sec->id].stub_sec; |
| if (stub_sec == NULL) |
| { |
| size_t namelen; |
| bfd_size_type len; |
| char *s_name; |
| |
| namelen = strlen (link_sec->name); |
| len = namelen + sizeof (STUB_SUFFIX); |
| s_name = bfd_alloc (htab->stub_bfd, len); |
| if (s_name == NULL) |
| return NULL; |
| |
| memcpy (s_name, link_sec->name, namelen); |
| memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| stub_sec = (*htab->add_stub_section) (s_name, link_sec); |
| if (stub_sec == NULL) |
| return NULL; |
| htab->stub_group[link_sec->id].stub_sec = stub_sec; |
| } |
| htab->stub_group[section->id].stub_sec = stub_sec; |
| } |
| |
| /* Enter this entry into the linker stub hash table. */ |
| stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| TRUE, FALSE); |
| if (stub_entry == NULL) |
| { |
| (*_bfd_error_handler) (_("%B: cannot create stub entry %s"), |
| section->owner, stub_name); |
| return NULL; |
| } |
| |
| stub_entry->stub_sec = stub_sec; |
| stub_entry->stub_offset = 0; |
| stub_entry->id_sec = link_sec; |
| return stub_entry; |
| } |
| |
| /* Create sections for linker generated code. */ |
| |
| static bfd_boolean |
| create_linkage_sections (bfd *dynobj, struct bfd_link_info *info) |
| { |
| struct ppc_link_hash_table *htab; |
| flagword flags; |
| |
| htab = ppc_hash_table (info); |
| |
| /* Create .sfpr for code to save and restore fp regs. */ |
| flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY |
| | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr", |
| flags); |
| if (htab->sfpr == NULL |
| || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2)) |
| return FALSE; |
| |
| /* Create .glink for lazy dynamic linking support. */ |
| htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink", |
| flags); |
| if (htab->glink == NULL |
| || ! bfd_set_section_alignment (dynobj, htab->glink, 3)) |
| return FALSE; |
| |
| /* Create branch lookup table for plt_branch stubs. */ |
| flags = (SEC_ALLOC | SEC_LOAD |
| | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt", |
| flags); |
| if (htab->brlt == NULL |
| || ! bfd_set_section_alignment (dynobj, htab->brlt, 3)) |
| return FALSE; |
| |
| if (!info->shared) |
| return TRUE; |
| |
| flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
| | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj, |
| ".rela.branch_lt", |
| flags); |
| if (!htab->relbrlt |
| || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3)) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| /* Create .got and .rela.got sections in ABFD, and .got in dynobj if |
| not already done. */ |
| |
| static bfd_boolean |
| create_got_section (bfd *abfd, struct bfd_link_info *info) |
| { |
| asection *got, *relgot; |
| flagword flags; |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| if (!htab->got) |
| { |
| if (! _bfd_elf_create_got_section (htab->elf.dynobj, info)) |
| return FALSE; |
| |
| htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got"); |
| if (!htab->got) |
| abort (); |
| } |
| |
| flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| | SEC_LINKER_CREATED); |
| |
| got = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
| if (!got |
| || !bfd_set_section_alignment (abfd, got, 3)) |
| return FALSE; |
| |
| relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got", |
| flags | SEC_READONLY); |
| if (!relgot |
| || ! bfd_set_section_alignment (abfd, relgot, 3)) |
| return FALSE; |
| |
| ppc64_elf_tdata (abfd)->got = got; |
| ppc64_elf_tdata (abfd)->relgot = relgot; |
| return TRUE; |
| } |
| |
| /* Create the dynamic sections, and set up shortcuts. */ |
| |
| static bfd_boolean |
| ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
| { |
| struct ppc_link_hash_table *htab; |
| |
| if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| return FALSE; |
| |
| htab = ppc_hash_table (info); |
| if (!htab->got) |
| htab->got = bfd_get_section_by_name (dynobj, ".got"); |
| htab->plt = bfd_get_section_by_name (dynobj, ".plt"); |
| htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
| if (!info->shared) |
| htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| |
| if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss |
| || (!info->shared && !htab->relbss)) |
| abort (); |
| |
| return TRUE; |
| } |
| |
| /* Merge PLT info on FROM with that on TO. */ |
| |
| static void |
| move_plt_plist (struct ppc_link_hash_entry *from, |
| struct ppc_link_hash_entry *to) |
| { |
| if (from->elf.plt.plist != NULL) |
| { |
| if (to->elf.plt.plist != NULL) |
| { |
| struct plt_entry **entp; |
| struct plt_entry *ent; |
| |
| for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; ) |
| { |
| struct plt_entry *dent; |
| |
| for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next) |
| if (dent->addend == ent->addend) |
| { |
| dent->plt.refcount += ent->plt.refcount; |
| *entp = ent->next; |
| break; |
| } |
| if (dent == NULL) |
| entp = &ent->next; |
| } |
| *entp = to->elf.plt.plist; |
| } |
| |
| to->elf.plt.plist = from->elf.plt.plist; |
| from->elf.plt.plist = NULL; |
| } |
| } |
| |
| /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| |
| static void |
| ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info, |
| struct elf_link_hash_entry *dir, |
| struct elf_link_hash_entry *ind) |
| { |
| struct ppc_link_hash_entry *edir, *eind; |
| |
| edir = (struct ppc_link_hash_entry *) dir; |
| eind = (struct ppc_link_hash_entry *) ind; |
| |
| /* Copy over any dynamic relocs we may have on the indirect sym. */ |
| if (eind->dyn_relocs != NULL) |
| { |
| if (edir->dyn_relocs != NULL) |
| { |
| struct ppc_dyn_relocs **pp; |
| struct ppc_dyn_relocs *p; |
| |
| /* Add reloc counts against the indirect sym to the direct sym |
| list. Merge any entries against the same section. */ |
| for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| { |
| struct ppc_dyn_relocs *q; |
| |
| for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| if (q->sec == p->sec) |
| { |
| q->pc_count += p->pc_count; |
| q->count += p->count; |
| *pp = p->next; |
| break; |
| } |
| if (q == NULL) |
| pp = &p->next; |
| } |
| *pp = edir->dyn_relocs; |
| } |
| |
| edir->dyn_relocs = eind->dyn_relocs; |
| eind->dyn_relocs = NULL; |
| } |
| |
| edir->is_func |= eind->is_func; |
| edir->is_func_descriptor |= eind->is_func_descriptor; |
| edir->tls_mask |= eind->tls_mask; |
| |
| /* If called to transfer flags for a weakdef during processing |
| of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF. |
| We clear it ourselves for ELIMINATE_COPY_RELOCS. */ |
| if (!(ELIMINATE_COPY_RELOCS |
| && eind->elf.root.type != bfd_link_hash_indirect |
| && edir->elf.dynamic_adjusted)) |
| edir->elf.non_got_ref |= eind->elf.non_got_ref; |
| |
| edir->elf.ref_dynamic |= eind->elf.ref_dynamic; |
| edir->elf.ref_regular |= eind->elf.ref_regular; |
| edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; |
| edir->elf.needs_plt |= eind->elf.needs_plt; |
| |
| /* If we were called to copy over info for a weak sym, that's all. */ |
| if (eind->elf.root.type != bfd_link_hash_indirect) |
| return; |
| |
| /* Copy over got entries that we may have already seen to the |
| symbol which just became indirect. */ |
| if (eind->elf.got.glist != NULL) |
| { |
| if (edir->elf.got.glist != NULL) |
| { |
| struct got_entry **entp; |
| struct got_entry *ent; |
| |
| for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; ) |
| { |
| struct got_entry *dent; |
| |
| for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next) |
| if (dent->addend == ent->addend |
| && dent->owner == ent->owner |
| && dent->tls_type == ent->tls_type) |
| { |
| dent->got.refcount += ent->got.refcount; |
| *entp = ent->next; |
| break; |
| } |
| if (dent == NULL) |
| entp = &ent->next; |
| } |
| *entp = edir->elf.got.glist; |
| } |
| |
| edir->elf.got.glist = eind->elf.got.glist; |
| eind->elf.got.glist = NULL; |
| } |
| |
| /* And plt entries. */ |
| move_plt_plist (eind, edir); |
| |
| if (eind->elf.dynindx != -1) |
| { |
| if (edir->elf.dynindx != -1) |
| _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| edir->elf.dynstr_index); |
| edir->elf.dynindx = eind->elf.dynindx; |
| edir->elf.dynstr_index = eind->elf.dynstr_index; |
| eind->elf.dynindx = -1; |
| eind->elf.dynstr_index = 0; |
| } |
| } |
| |
| /* Find the function descriptor hash entry from the given function code |
| hash entry FH. Link the entries via their OH fields. */ |
| |
| static struct ppc_link_hash_entry * |
| get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab) |
| { |
| struct ppc_link_hash_entry *fdh = fh->oh; |
| |
| if (fdh == NULL) |
| { |
| const char *fd_name = fh->elf.root.root.string + 1; |
| |
| fdh = (struct ppc_link_hash_entry *) |
| elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE); |
| if (fdh != NULL) |
| { |
| fdh->is_func_descriptor = 1; |
| fdh->oh = fh; |
| fh->is_func = 1; |
| fh->oh = fdh; |
| } |
| } |
| |
| return fdh; |
| } |
| |
| /* Make a fake function descriptor sym for the code sym FH. */ |
| |
| static struct ppc_link_hash_entry * |
| make_fdh (struct bfd_link_info *info, |
| struct ppc_link_hash_entry *fh) |
| { |
| bfd *abfd; |
| asymbol *newsym; |
| struct bfd_link_hash_entry *bh; |
| struct ppc_link_hash_entry *fdh; |
| |
| abfd = fh->elf.root.u.undef.abfd; |
| newsym = bfd_make_empty_symbol (abfd); |
| newsym->name = fh->elf.root.root.string + 1; |
| newsym->section = bfd_und_section_ptr; |
| newsym->value = 0; |
| newsym->flags = BSF_WEAK; |
| |
| bh = NULL; |
| if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name, |
| newsym->flags, newsym->section, |
| newsym->value, NULL, FALSE, FALSE, |
| &bh)) |
| return NULL; |
| |
| fdh = (struct ppc_link_hash_entry *) bh; |
| fdh->elf.non_elf = 0; |
| fdh->fake = 1; |
| fdh->is_func_descriptor = 1; |
| fdh->oh = fh; |
| fh->is_func = 1; |
| fh->oh = fdh; |
| return fdh; |
| } |
| |
| /* Fix function descriptor symbols defined in .opd sections to be |
| function type. */ |
| |
| static bfd_boolean |
| ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| Elf_Internal_Sym *isym, |
| const char **name ATTRIBUTE_UNUSED, |
| flagword *flags ATTRIBUTE_UNUSED, |
| asection **sec, |
| bfd_vma *value ATTRIBUTE_UNUSED) |
| { |
| if (*sec != NULL |
| && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0) |
| isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC); |
| |
| return TRUE; |
| } |
| |
| /* This function makes an old ABI object reference to ".bar" cause the |
| inclusion of a new ABI object archive that defines "bar". |
| NAME is a symbol defined in an archive. Return a symbol in the hash |
| table that might be satisfied by the archive symbols. */ |
| |
| static struct elf_link_hash_entry * |
| ppc64_elf_archive_symbol_lookup (bfd *abfd, |
| struct bfd_link_info *info, |
| const char *name) |
| { |
| struct elf_link_hash_entry *h; |
| char *dot_name; |
| size_t len; |
| |
| h = _bfd_elf_archive_symbol_lookup (abfd, info, name); |
| if (h != NULL |
| /* Don't return this sym if it is a fake function descriptor |
| created by add_symbol_adjust. */ |
| && !(h->root.type == bfd_link_hash_undefweak |
| && ((struct ppc_link_hash_entry *) h)->fake)) |
| return h; |
| |
| if (name[0] == '.') |
| return h; |
| |
| len = strlen (name); |
| dot_name = bfd_alloc (abfd, len + 2); |
| if (dot_name == NULL) |
| return (struct elf_link_hash_entry *) 0 - 1; |
| dot_name[0] = '.'; |
| memcpy (dot_name + 1, name, len + 1); |
| h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name); |
| bfd_release (abfd, dot_name); |
| return h; |
| } |
| |
| /* This function satisfies all old ABI object references to ".bar" if a |
| new ABI object defines "bar". Well, at least, undefined dot symbols |
| are made weak. This stops later archive searches from including an |
| object if we already have a function descriptor definition. It also |
| prevents the linker complaining about undefined symbols. |
| We also check and correct mismatched symbol visibility here. The |
| most restrictive visibility of the function descriptor and the |
| function entry symbol is used. */ |
| |
| static bfd_boolean |
| add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info) |
| { |
| struct ppc_link_hash_table *htab; |
| struct ppc_link_hash_entry *fdh; |
| |
| if (eh->elf.root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (eh->elf.root.type == bfd_link_hash_warning) |
| eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link; |
| |
| if (eh->elf.root.root.string[0] != '.') |
| abort (); |
| |
| htab = ppc_hash_table (info); |
| fdh = get_fdh (eh, htab); |
| if (fdh == NULL |
| && !info->relocatable |
| && (eh->elf.root.type == bfd_link_hash_undefined |
| || eh->elf.root.type == bfd_link_hash_undefweak) |
| && eh->elf.ref_regular) |
| { |
| /* Make an undefweak function descriptor sym, which is enough to |
| pull in an --as-needed shared lib, but won't cause link |
| errors. Archives are handled elsewhere. */ |
| fdh = make_fdh (info, eh); |
| if (fdh == NULL) |
| return FALSE; |
| else |
| fdh->elf.ref_regular = 1; |
| } |
| else if (fdh != NULL) |
| { |
| unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1; |
| unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1; |
| if (entry_vis < descr_vis) |
| fdh->elf.other += entry_vis - descr_vis; |
| else if (entry_vis > descr_vis) |
| eh->elf.other += descr_vis - entry_vis; |
| |
| if ((fdh->elf.root.type == bfd_link_hash_defined |
| || fdh->elf.root.type == bfd_link_hash_defweak) |
| && eh->elf.root.type == bfd_link_hash_undefined) |
| { |
| eh->elf.root.type = bfd_link_hash_undefweak; |
| eh->was_undefined = 1; |
| htab->twiddled_syms = 1; |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* Process list of dot-symbols we made in link_hash_newfunc. */ |
| |
| static bfd_boolean |
| ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info) |
| { |
| struct ppc_link_hash_table *htab; |
| struct ppc_link_hash_entry **p, *eh; |
| |
| htab = ppc_hash_table (info); |
| if (!is_ppc64_elf_target (htab->elf.root.creator)) |
| return TRUE; |
| |
| if (is_ppc64_elf_target (ibfd->xvec)) |
| { |
| p = &htab->dot_syms; |
| while ((eh = *p) != NULL) |
| { |
| *p = NULL; |
| if (!add_symbol_adjust (eh, info)) |
| return FALSE; |
| p = &eh->u.next_dot_sym; |
| } |
| } |
| |
| /* Clear the list for non-ppc64 input files. */ |
| p = &htab->dot_syms; |
| while ((eh = *p) != NULL) |
| { |
| *p = NULL; |
| p = &eh->u.next_dot_sym; |
| } |
| |
| /* We need to fix the undefs list for any syms we have twiddled to |
| undef_weak. */ |
| if (htab->twiddled_syms) |
| { |
| bfd_link_repair_undef_list (&htab->elf.root); |
| htab->twiddled_syms = 0; |
| } |
| return TRUE; |
| } |
| |
| /* Undo hash table changes when an --as-needed input file is determined |
| not to be needed. */ |
| |
| static bfd_boolean |
| ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info) |
| { |
| ppc_hash_table (info)->dot_syms = NULL; |
| return TRUE; |
| } |
| |
| static bfd_boolean |
| update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, |
| unsigned long r_symndx, bfd_vma r_addend, int tls_type) |
| { |
| struct got_entry **local_got_ents = elf_local_got_ents (abfd); |
| char *local_got_tls_masks; |
| |
| if (local_got_ents == NULL) |
| { |
| bfd_size_type size = symtab_hdr->sh_info; |
| |
| size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks); |
| local_got_ents = bfd_zalloc (abfd, size); |
| if (local_got_ents == NULL) |
| return FALSE; |
| elf_local_got_ents (abfd) = local_got_ents; |
| } |
| |
| if ((tls_type & TLS_EXPLICIT) == 0) |
| { |
| struct got_entry *ent; |
| |
| for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next) |
| if (ent->addend == r_addend |
| && ent->owner == abfd |
| && ent->tls_type == tls_type) |
| break; |
| if (ent == NULL) |
| { |
| bfd_size_type amt = sizeof (*ent); |
| ent = bfd_alloc (abfd, amt); |
| if (ent == NULL) |
| return FALSE; |
| ent->next = local_got_ents[r_symndx]; |
| ent->addend = r_addend; |
| ent->owner = abfd; |
| ent->tls_type = tls_type; |
| ent->got.refcount = 0; |
| local_got_ents[r_symndx] = ent; |
| } |
| ent->got.refcount += 1; |
| } |
| |
| local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info); |
| local_got_tls_masks[r_symndx] |= tls_type; |
| return TRUE; |
| } |
| |
| static bfd_boolean |
| update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend) |
| { |
| struct plt_entry *ent; |
| |
| for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == addend) |
| break; |
| if (ent == NULL) |
| { |
| bfd_size_type amt = sizeof (*ent); |
| ent = bfd_alloc (abfd, amt); |
| if (ent == NULL) |
| return FALSE; |
| ent->next = eh->elf.plt.plist; |
| ent->addend = addend; |
| ent->plt.refcount = 0; |
| eh->elf.plt.plist = ent; |
| } |
| ent->plt.refcount += 1; |
| eh->elf.needs_plt = 1; |
| if (eh->elf.root.root.string[0] == '.' |
| && eh->elf.root.root.string[1] != '\0') |
| eh->is_func = 1; |
| return TRUE; |
| } |
| |
| /* Look through the relocs for a section during the first phase, and |
| calculate needed space in the global offset table, procedure |
| linkage table, and dynamic reloc sections. */ |
| |
| static bfd_boolean |
| ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| asection *sec, const Elf_Internal_Rela *relocs) |
| { |
| struct ppc_link_hash_table *htab; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| const Elf_Internal_Rela *rel; |
| const Elf_Internal_Rela *rel_end; |
| asection *sreloc; |
| asection **opd_sym_map; |
| |
| if (info->relocatable) |
| return TRUE; |
| |
| /* Don't do anything special with non-loaded, non-alloced sections. |
| In particular, any relocs in such sections should not affect GOT |
| and PLT reference counting (ie. we don't allow them to create GOT |
| or PLT entries), there's no possibility or desire to optimize TLS |
| relocs, and there's not much point in propagating relocs to shared |
| libs that the dynamic linker won't relocate. */ |
| if ((sec->flags & SEC_ALLOC) == 0) |
| return TRUE; |
| |
| htab = ppc_hash_table (info); |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| |
| sym_hashes = elf_sym_hashes (abfd); |
| sym_hashes_end = (sym_hashes |
| + symtab_hdr->sh_size / sizeof (Elf64_External_Sym) |
| - symtab_hdr->sh_info); |
| |
| sreloc = NULL; |
| opd_sym_map = NULL; |
| if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0) |
| { |
| /* Garbage collection needs some extra help with .opd sections. |
| We don't want to necessarily keep everything referenced by |
| relocs in .opd, as that would keep all functions. Instead, |
| if we reference an .opd symbol (a function descriptor), we |
| want to keep the function code symbol's section. This is |
| easy for global symbols, but for local syms we need to keep |
| information about the associated function section. Later, if |
| edit_opd deletes entries, we'll use this array to adjust |
| local syms in .opd. */ |
| union opd_info { |
| asection *func_section; |
| long entry_adjust; |
| }; |
| bfd_size_type amt; |
| |
| amt = sec->size * sizeof (union opd_info) / 8; |
| opd_sym_map = bfd_zalloc (abfd, amt); |
| if (opd_sym_map == NULL) |
| return FALSE; |
| ppc64_elf_section_data (sec)->u.opd_func_sec = opd_sym_map; |
| BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal); |
| ppc64_elf_section_data (sec)->sec_type = sec_opd; |
| } |
| |
| if (htab->sfpr == NULL |
| && !create_linkage_sections (htab->elf.dynobj, info)) |
| return FALSE; |
| |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; rel++) |
| { |
| unsigned long r_symndx; |
| struct elf_link_hash_entry *h; |
| enum elf_ppc64_reloc_type r_type; |
| int tls_type = 0; |
| struct _ppc64_elf_section_data *ppc64_sec; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (r_symndx < symtab_hdr->sh_info) |
| h = NULL; |
| else |
| { |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| } |
| |
| r_type = ELF64_R_TYPE (rel->r_info); |
| switch (r_type) |
| { |
| case R_PPC64_GOT_TLSLD16: |
| case R_PPC64_GOT_TLSLD16_LO: |
| case R_PPC64_GOT_TLSLD16_HI: |
| case R_PPC64_GOT_TLSLD16_HA: |
| ppc64_tlsld_got (abfd)->refcount += 1; |
| tls_type = TLS_TLS | TLS_LD; |
| goto dogottls; |
| |
| case R_PPC64_GOT_TLSGD16: |
| case R_PPC64_GOT_TLSGD16_LO: |
| case R_PPC64_GOT_TLSGD16_HI: |
| case R_PPC64_GOT_TLSGD16_HA: |
| tls_type = TLS_TLS | TLS_GD; |
| goto dogottls; |
| |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| case R_PPC64_GOT_TPREL16_HI: |
| case R_PPC64_GOT_TPREL16_HA: |
| if (info->shared) |
| info->flags |= DF_STATIC_TLS; |
| tls_type = TLS_TLS | TLS_TPREL; |
| goto dogottls; |
| |
| case R_PPC64_GOT_DTPREL16_DS: |
| case R_PPC64_GOT_DTPREL16_LO_DS: |
| case R_PPC64_GOT_DTPREL16_HI: |
| case R_PPC64_GOT_DTPREL16_HA: |
| tls_type = TLS_TLS | TLS_DTPREL; |
| dogottls: |
| sec->has_tls_reloc = 1; |
| /* Fall thru */ |
| |
| case R_PPC64_GOT16: |
| case R_PPC64_GOT16_DS: |
| case R_PPC64_GOT16_HA: |
| case R_PPC64_GOT16_HI: |
| case R_PPC64_GOT16_LO: |
| case R_PPC64_GOT16_LO_DS: |
| /* This symbol requires a global offset table entry. */ |
| sec->has_toc_reloc = 1; |
| if (ppc64_elf_tdata (abfd)->got == NULL |
| && !create_got_section (abfd, info)) |
| return FALSE; |
| |
| if (h != NULL) |
| { |
| struct ppc_link_hash_entry *eh; |
| struct got_entry *ent; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend |
| && ent->owner == abfd |
| && ent->tls_type == tls_type) |
| break; |
| if (ent == NULL) |
| { |
| bfd_size_type amt = sizeof (*ent); |
| ent = bfd_alloc (abfd, amt); |
| if (ent == NULL) |
| return FALSE; |
| ent->next = eh->elf.got.glist; |
| ent->addend = rel->r_addend; |
| ent->owner = abfd; |
| ent->tls_type = tls_type; |
| ent->got.refcount = 0; |
| eh->elf.got.glist = ent; |
| } |
| ent->got.refcount += 1; |
| eh->tls_mask |= tls_type; |
| } |
| else |
| /* This is a global offset table entry for a local symbol. */ |
| if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| rel->r_addend, tls_type)) |
| return FALSE; |
| break; |
| |
| case R_PPC64_PLT16_HA: |
| case R_PPC64_PLT16_HI: |
| case R_PPC64_PLT16_LO: |
| case R_PPC64_PLT32: |
| case R_PPC64_PLT64: |
| /* This symbol requires a procedure linkage table entry. We |
| actually build the entry in adjust_dynamic_symbol, |
| because this might be a case of linking PIC code without |
| linking in any dynamic objects, in which case we don't |
| need to generate a procedure linkage table after all. */ |
| if (h == NULL) |
| { |
| /* It does not make sense to have a procedure linkage |
| table entry for a local symbol. */ |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| else |
| if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h, |
| rel->r_addend)) |
| return FALSE; |
| break; |
| |
| /* The following relocations don't need to propagate the |
| relocation if linking a shared object since they are |
| section relative. */ |
| case R_PPC64_SECTOFF: |
| case R_PPC64_SECTOFF_LO: |
| case R_PPC64_SECTOFF_HI: |
| case R_PPC64_SECTOFF_HA: |
| case R_PPC64_SECTOFF_DS: |
| case R_PPC64_SECTOFF_LO_DS: |
| case R_PPC64_DTPREL16: |
| case R_PPC64_DTPREL16_LO: |
| case R_PPC64_DTPREL16_HI: |
| case R_PPC64_DTPREL16_HA: |
| case R_PPC64_DTPREL16_DS: |
| case R_PPC64_DTPREL16_LO_DS: |
| case R_PPC64_DTPREL16_HIGHER: |
| case R_PPC64_DTPREL16_HIGHERA: |
| case R_PPC64_DTPREL16_HIGHEST: |
| case R_PPC64_DTPREL16_HIGHESTA: |
| break; |
| |
| /* Nor do these. */ |
| case R_PPC64_TOC16: |
| case R_PPC64_TOC16_LO: |
| case R_PPC64_TOC16_HI: |
| case R_PPC64_TOC16_HA: |
| case R_PPC64_TOC16_DS: |
| case R_PPC64_TOC16_LO_DS: |
| sec->has_toc_reloc = 1; |
| break; |
| |
| /* This relocation describes the C++ object vtable hierarchy. |
| Reconstruct it for later use during GC. */ |
| case R_PPC64_GNU_VTINHERIT: |
| if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| return FALSE; |
| break; |
| |
| /* This relocation describes which C++ vtable entries are actually |
| used. Record for later use during GC. */ |
| case R_PPC64_GNU_VTENTRY: |
| BFD_ASSERT (h != NULL); |
| if (h != NULL |
| && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| return FALSE; |
| break; |
| |
| case R_PPC64_REL14: |
| case R_PPC64_REL14_BRTAKEN: |
| case R_PPC64_REL14_BRNTAKEN: |
| { |
| asection *dest = NULL; |
| |
| /* Heuristic: If jumping outside our section, chances are |
| we are going to need a stub. */ |
| if (h != NULL) |
| { |
| /* If the sym is weak it may be overridden later, so |
| don't assume we know where a weak sym lives. */ |
| if (h->root.type == bfd_link_hash_defined) |
| dest = h->root.u.def.section; |
| } |
| else |
| dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
| sec, r_symndx); |
| if (dest != sec) |
| ppc64_elf_section_data (sec)->has_14bit_branch = 1; |
| } |
| /* Fall through. */ |
| |
| case R_PPC64_REL24: |
| if (h != NULL) |
| { |
| /* We may need a .plt entry if the function this reloc |
| refers to is in a shared lib. */ |
| if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h, |
| rel->r_addend)) |
| return FALSE; |
| if (h == &htab->tls_get_addr->elf |
| || h == &htab->tls_get_addr_fd->elf) |
| sec->has_tls_reloc = 1; |
| else if (htab->tls_get_addr == NULL |
| && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr") |
| && (h->root.root.string[15] == 0 |
| || h->root.root.string[15] == '@')) |
| { |
| htab->tls_get_addr = (struct ppc_link_hash_entry *) h; |
| sec->has_tls_reloc = 1; |
| } |
| else if (htab->tls_get_addr_fd == NULL |
| && CONST_STRNEQ (h->root.root.string, "__tls_get_addr") |
| && (h->root.root.string[14] == 0 |
| || h->root.root.string[14] == '@')) |
| { |
| htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h; |
| sec->has_tls_reloc = 1; |
| } |
| } |
| break; |
| |
| case R_PPC64_TPREL64: |
| tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL; |
| if (info->shared) |
| info->flags |= DF_STATIC_TLS; |
| goto dotlstoc; |
| |
| case R_PPC64_DTPMOD64: |
| if (rel + 1 < rel_end |
| && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) |
| && rel[1].r_offset == rel->r_offset + 8) |
| tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD; |
| else |
| tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD; |
| goto dotlstoc; |
| |
| case R_PPC64_DTPREL64: |
| tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL; |
| if (rel != relocs |
| && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64) |
| && rel[-1].r_offset == rel->r_offset - 8) |
| /* This is the second reloc of a dtpmod, dtprel pair. |
| Don't mark with TLS_DTPREL. */ |
| goto dodyn; |
| |
| dotlstoc: |
| sec->has_tls_reloc = 1; |
| if (h != NULL) |
| { |
| struct ppc_link_hash_entry *eh; |
| eh = (struct ppc_link_hash_entry *) h; |
| eh->tls_mask |= tls_type; |
| } |
| else |
| if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| rel->r_addend, tls_type)) |
| return FALSE; |
| |
| ppc64_sec = ppc64_elf_section_data (sec); |
| if (ppc64_sec->sec_type != sec_toc) |
| { |
| /* One extra to simplify get_tls_mask. */ |
| bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1; |
| ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt); |
| if (ppc64_sec->u.t_symndx == NULL) |
| return FALSE; |
| BFD_ASSERT (ppc64_sec->sec_type == sec_normal); |
| ppc64_sec->sec_type = sec_toc; |
| } |
| BFD_ASSERT (rel->r_offset % 8 == 0); |
| ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx; |
| |
| /* Mark the second slot of a GD or LD entry. |
| -1 to indicate GD and -2 to indicate LD. */ |
| if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD)) |
| ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1; |
| else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD)) |
| ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2; |
| goto dodyn; |
| |
| case R_PPC64_TPREL16: |
| case R_PPC64_TPREL16_LO: |
| case R_PPC64_TPREL16_HI: |
| case R_PPC64_TPREL16_HA: |
| case R_PPC64_TPREL16_DS: |
| case R_PPC64_TPREL16_LO_DS: |
| case R_PPC64_TPREL16_HIGHER: |
| case R_PPC64_TPREL16_HIGHERA: |
| case R_PPC64_TPREL16_HIGHEST: |
| case R_PPC64_TPREL16_HIGHESTA: |
| if (info->shared) |
| { |
| info->flags |= DF_STATIC_TLS; |
| goto dodyn; |
| } |
| break; |
| |
| case R_PPC64_ADDR64: |
| if (opd_sym_map != NULL |
| && rel + 1 < rel_end |
| && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC) |
| { |
| if (h != NULL) |
| { |
| if (h->root.root.string[0] == '.' |
| && h->root.root.string[1] != 0 |
| && get_fdh ((struct ppc_link_hash_entry *) h, htab)) |
| ; |
| else |
| ((struct ppc_link_hash_entry *) h)->is_func = 1; |
| } |
| else |
| { |
| asection *s; |
| |
| s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec, |
| r_symndx); |
| if (s == NULL) |
| return FALSE; |
| else if (s != sec) |
| opd_sym_map[rel->r_offset / 8] = s; |
| } |
| } |
| /* Fall through. */ |
| |
| case R_PPC64_REL30: |
| case R_PPC64_REL32: |
| case R_PPC64_REL64: |
| case R_PPC64_ADDR14: |
| case R_PPC64_ADDR14_BRNTAKEN: |
| case R_PPC64_ADDR14_BRTAKEN: |
| case R_PPC64_ADDR16: |
| case R_PPC64_ADDR16_DS: |
| case R_PPC64_ADDR16_HA: |
| case R_PPC64_ADDR16_HI: |
| case R_PPC64_ADDR16_HIGHER: |
| case R_PPC64_ADDR16_HIGHERA: |
| case R_PPC64_ADDR16_HIGHEST: |
| case R_PPC64_ADDR16_HIGHESTA: |
| case R_PPC64_ADDR16_LO: |
| case R_PPC64_ADDR16_LO_DS: |
| case R_PPC64_ADDR24: |
| case R_PPC64_ADDR32: |
| case R_PPC64_UADDR16: |
| case R_PPC64_UADDR32: |
| case R_PPC64_UADDR64: |
| case R_PPC64_TOC: |
| if (h != NULL && !info->shared) |
| /* We may need a copy reloc. */ |
| h->non_got_ref = 1; |
| |
| /* Don't propagate .opd relocs. */ |
| if (NO_OPD_RELOCS && opd_sym_map != NULL) |
| break; |
| |
| /* If we are creating a shared library, and this is a reloc |
| against a global symbol, or a non PC relative reloc |
| against a local symbol, then we need to copy the reloc |
| into the shared library. However, if we are linking with |
| -Bsymbolic, we do not need to copy a reloc against a |
| global symbol which is defined in an object we are |
| including in the link (i.e., DEF_REGULAR is set). At |
| this point we have not seen all the input files, so it is |
| possible that DEF_REGULAR is not set now but will be set |
| later (it is never cleared). In case of a weak definition, |
| DEF_REGULAR may be cleared later by a strong definition in |
| a shared library. We account for that possibility below by |
| storing information in the dyn_relocs field of the hash |
| table entry. A similar situation occurs when creating |
| shared libraries and symbol visibility changes render the |
| symbol local. |
| |
| If on the other hand, we are creating an executable, we |
| may need to keep relocations for symbols satisfied by a |
| dynamic library if we manage to avoid copy relocs for the |
| symbol. */ |
| dodyn: |
| if ((info->shared |
| && (MUST_BE_DYN_RELOC (r_type) |
| || (h != NULL |
| && (! info->symbolic |
| || h->root.type == bfd_link_hash_defweak |
| || !h->def_regular)))) |
| || (ELIMINATE_COPY_RELOCS |
| && !info->shared |
| && h != NULL |
| && (h->root.type == bfd_link_hash_defweak |
| || !h->def_regular))) |
| { |
| struct ppc_dyn_relocs *p; |
| struct ppc_dyn_relocs **head; |
| |
| /* We must copy these reloc types into the output file. |
| Create a reloc section in dynobj and make room for |
| this reloc. */ |
| if (sreloc == NULL) |
| { |
| const char *name; |
| bfd *dynobj; |
| |
| name = (bfd_elf_string_from_elf_section |
| (abfd, |
| elf_elfheader (abfd)->e_shstrndx, |
| elf_section_data (sec)->rel_hdr.sh_name)); |
| if (name == NULL) |
| return FALSE; |
| |
| if (! CONST_STRNEQ (name, ".rela") |
| || strcmp (bfd_get_section_name (abfd, sec), |
| name + 5) != 0) |
| { |
| (*_bfd_error_handler) |
| (_("%B: bad relocation section name `%s\'"), |
| abfd, name); |
| bfd_set_error (bfd_error_bad_value); |
| } |
| |
| dynobj = htab->elf.dynobj; |
| sreloc = bfd_get_section_by_name (dynobj, name); |
| if (sreloc == NULL) |
| { |
| flagword flags; |
| |
| flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| | SEC_ALLOC | SEC_LOAD); |
| sreloc = bfd_make_section_with_flags (dynobj, |
| name, |
| flags); |
| if (sreloc == NULL |
| || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
| return FALSE; |
| } |
| elf_section_data (sec)->sreloc = sreloc; |
| } |
| |
| /* If this is a global symbol, we count the number of |
| relocations we need for this symbol. */ |
| if (h != NULL) |
| { |
| head = &((struct ppc_link_hash_entry *) h)->dyn_relocs; |
| } |
| else |
| { |
| /* Track dynamic relocs needed for local syms too. |
| We really need local syms available to do this |
| easily. Oh well. */ |
| |
| asection *s; |
| void *vpp; |
| |
| s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
| sec, r_symndx); |
| if (s == NULL) |
| return FALSE; |
| |
| vpp = &elf_section_data (s)->local_dynrel; |
| head = (struct ppc_dyn_relocs **) vpp; |
| } |
| |
| p = *head; |
| if (p == NULL || p->sec != sec) |
| { |
| p = bfd_alloc (htab->elf.dynobj, sizeof *p); |
| if (p == NULL) |
| return FALSE; |
| p->next = *head; |
| *head = p; |
| p->sec = sec; |
| p->count = 0; |
| p->pc_count = 0; |
| } |
| |
| p->count += 1; |
| if (!MUST_BE_DYN_RELOC (r_type)) |
| p->pc_count += 1; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* OFFSET in OPD_SEC specifies a function descriptor. Return the address |
| of the code entry point, and its section. */ |
| |
| static bfd_vma |
| opd_entry_value (asection *opd_sec, |
| bfd_vma offset, |
| asection **code_sec, |
| bfd_vma *code_off) |
| { |
| bfd *opd_bfd = opd_sec->owner; |
| Elf_Internal_Rela *relocs; |
| Elf_Internal_Rela *lo, *hi, *look; |
| bfd_vma val; |
| |
| /* No relocs implies we are linking a --just-symbols object. */ |
| if (opd_sec->reloc_count == 0) |
| { |
| bfd_vma val; |
| |
| if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8)) |
| return (bfd_vma) -1; |
| |
| if (code_sec != NULL) |
| { |
| asection *sec, *likely = NULL; |
| for (sec = opd_bfd->sections; sec != NULL; sec = sec->next) |
| if (sec->vma <= val |
| && (sec->flags & SEC_LOAD) != 0 |
| && (sec->flags & SEC_ALLOC) != 0) |
| likely = sec; |
| if (likely != NULL) |
| { |
| *code_sec = likely; |
| if (code_off != NULL) |
| *code_off = val - likely->vma; |
| } |
| } |
| return val; |
| } |
| |
| relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs; |
| if (relocs == NULL) |
| relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE); |
| |
| /* Go find the opd reloc at the sym address. */ |
| lo = relocs; |
| BFD_ASSERT (lo != NULL); |
| hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */ |
| val = (bfd_vma) -1; |
| while (lo < hi) |
| { |
| look = lo + (hi - lo) / 2; |
| if (look->r_offset < offset) |
| lo = look + 1; |
| else if (look->r_offset > offset) |
| hi = look; |
| else |
| { |
| Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr; |
| if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64 |
| && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC) |
| { |
| unsigned long symndx = ELF64_R_SYM (look->r_info); |
| asection *sec; |
| |
| if (symndx < symtab_hdr->sh_info) |
| { |
| Elf_Internal_Sym *sym; |
| |
| sym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| if (sym == NULL) |
| { |
| sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, |
| symtab_hdr->sh_info, |
| 0, NULL, NULL, NULL); |
| if (sym == NULL) |
| break; |
| symtab_hdr->contents = (bfd_byte *) sym; |
| } |
| |
| sym += symndx; |
| val = sym->st_value; |
| sec = NULL; |
| if ((sym->st_shndx != SHN_UNDEF |
| && sym->st_shndx < SHN_LORESERVE) |
| || sym->st_shndx > SHN_HIRESERVE) |
| sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx); |
| BFD_ASSERT ((sec->flags & SEC_MERGE) == 0); |
| } |
| else |
| { |
| struct elf_link_hash_entry **sym_hashes; |
| struct elf_link_hash_entry *rh; |
| |
| sym_hashes = elf_sym_hashes (opd_bfd); |
| rh = sym_hashes[symndx - symtab_hdr->sh_info]; |
| while (rh->root.type == bfd_link_hash_indirect |
| || rh->root.type == bfd_link_hash_warning) |
| rh = ((struct elf_link_hash_entry *) rh->root.u.i.link); |
| BFD_ASSERT (rh->root.type == bfd_link_hash_defined |
| || rh->root.type == bfd_link_hash_defweak); |
| val = rh->root.u.def.value; |
| sec = rh->root.u.def.section; |
| } |
| val += look->r_addend; |
| if (code_off != NULL) |
| *code_off = val; |
| if (code_sec != NULL) |
| *code_sec = sec; |
| if (sec != NULL && sec->output_section != NULL) |
| val += sec->output_section->vma + sec->output_offset; |
| } |
| break; |
| } |
| } |
| |
| return val; |
| } |
| |
| /* Mark sections containing dynamically referenced symbols. When |
| building shared libraries, we must assume that any visible symbol is |
| referenced. */ |
| |
| static bfd_boolean |
| ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf) |
| { |
| struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h; |
| |
| if (eh->elf.root.type == bfd_link_hash_warning) |
| eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link; |
| |
| /* Dynamic linking info is on the func descriptor sym. */ |
| if (eh->oh != NULL |
| && eh->oh->is_func_descriptor |
| && (eh->oh->elf.root.type == bfd_link_hash_defined |
| || eh->oh->elf.root.type == bfd_link_hash_defweak)) |
| eh = eh->oh; |
| |
| if ((eh->elf.root.type == bfd_link_hash_defined |
| || eh->elf.root.type == bfd_link_hash_defweak) |
| && (eh->elf.ref_dynamic |
| || (!info->executable |
| && eh->elf.def_regular |
| && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL |
| && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN))) |
| { |
| asection *code_sec; |
| |
| eh->elf.root.u.def.section->flags |= SEC_KEEP; |
| |
| /* Function descriptor syms cause the associated |
| function code sym section to be marked. */ |
| if (eh->is_func_descriptor |
| && (eh->oh->elf.root.type == bfd_link_hash_defined |
| || eh->oh->elf.root.type == bfd_link_hash_defweak)) |
| eh->oh->elf.root.u.def.section->flags |= SEC_KEEP; |
| else if (get_opd_info (eh->elf.root.u.def.section) != NULL |
| && opd_entry_value (eh->elf.root.u.def.section, |
| eh->elf.root.u.def.value, |
| &code_sec, NULL) != (bfd_vma) -1) |
| code_sec->flags |= SEC_KEEP; |
| } |
| |
| return TRUE; |
| } |
| |
| /* Return the section that should be marked against GC for a given |
| relocation. */ |
| |
| static asection * |
| ppc64_elf_gc_mark_hook (asection *sec, |
| struct bfd_link_info *info, |
| Elf_Internal_Rela *rel, |
| struct elf_link_hash_entry *h, |
| Elf_Internal_Sym *sym) |
| { |
| asection *rsec; |
| |
| /* First mark all our entry sym sections. */ |
| if (info->gc_sym_list != NULL) |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| struct bfd_sym_chain *sym = info->gc_sym_list; |
| |
| info->gc_sym_list = NULL; |
| for (; sym != NULL; sym = sym->next) |
| { |
| struct ppc_link_hash_entry *eh; |
| |
| eh = (struct ppc_link_hash_entry *) |
| elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE); |
| if (eh == NULL) |
| continue; |
| if (eh->elf.root.type != bfd_link_hash_defined |
| && eh->elf.root.type != bfd_link_hash_defweak) |
| continue; |
| |
| if (eh->is_func_descriptor |
| && (eh->oh->elf.root.type == bfd_link_hash_defined |
| || eh->oh->elf.root.type == bfd_link_hash_defweak)) |
| rsec = eh->oh->elf.root.u.def.section; |
| else if (get_opd_info (eh->elf.root.u.def.section) != NULL |
| && opd_entry_value (eh->elf.root.u.def.section, |
| eh->elf.root.u.def.value, |
| &rsec, NULL) != (bfd_vma) -1) |
| ; |
| else |
| continue; |
| |
| if (!rsec->gc_mark) |
| _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook); |
| |
| rsec = eh->elf.root.u.def.section; |
| if (!rsec->gc_mark) |
| _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook); |
| } |
| } |
| |
| /* Syms return NULL if we're marking .opd, so we avoid marking all |
| function sections, as all functions are referenced in .opd. */ |
| rsec = NULL; |
| if (get_opd_info (sec) != NULL) |
| return rsec; |
| |
| if (h != NULL) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| struct ppc_link_hash_entry *eh; |
| |
| r_type = ELF64_R_TYPE (rel->r_info); |
| switch (r_type) |
| { |
| case R_PPC64_GNU_VTINHERIT: |
| case R_PPC64_GNU_VTENTRY: |
| break; |
| |
| default: |
| switch (h->root.type) |
| { |
| case bfd_link_hash_defined: |
| case bfd_link_hash_defweak: |
| eh = (struct ppc_link_hash_entry *) h; |
| if (eh->oh != NULL |
| && eh->oh->is_func_descriptor |
| && (eh->oh->elf.root.type == bfd_link_hash_defined |
| || eh->oh->elf.root.type == bfd_link_hash_defweak)) |
| eh = eh->oh; |
| |
| /* Function descriptor syms cause the associated |
| function code sym section to be marked. */ |
| if (eh->is_func_descriptor |
| && (eh->oh->elf.root.type == bfd_link_hash_defined |
| || eh->oh->elf.root.type == bfd_link_hash_defweak)) |
| { |
| /* They also mark their opd section. */ |
| if (!eh->elf.root.u.def.section->gc_mark) |
| _bfd_elf_gc_mark (info, eh->elf.root.u.def.section, |
| ppc64_elf_gc_mark_hook); |
| |
| rsec = eh->oh->elf.root.u.def.section; |
| } |
| else if (get_opd_info (eh->elf.root.u.def.section) != NULL |
| && opd_entry_value (eh->elf.root.u.def.section, |
| eh->elf.root.u.def.value, |
| &rsec, NULL) != (bfd_vma) -1) |
| { |
| if (!eh->elf.root.u.def.section->gc_mark) |
| _bfd_elf_gc_mark (info, eh->elf.root.u.def.section, |
| ppc64_elf_gc_mark_hook); |
| } |
| else |
| rsec = h->root.u.def.section; |
| break; |
| |
| case bfd_link_hash_common: |
| rsec = h->root.u.c.p->section; |
| break; |
| |
| default: |
| break; |
| } |
| } |
| } |
| else |
| { |
| asection **opd_sym_section; |
| |
| rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| opd_sym_section = get_opd_info (rsec); |
| if (opd_sym_section != NULL) |
| { |
| if (!rsec->gc_mark) |
| _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook); |
| |
| rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8]; |
| } |
| } |
| |
| return rsec; |
| } |
| |
| /* Update the .got, .plt. and dynamic reloc reference counts for the |
| section being removed. */ |
| |
| static bfd_boolean |
| ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
| asection *sec, const Elf_Internal_Rela *relocs) |
| { |
| struct ppc_link_hash_table *htab; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| struct got_entry **local_got_ents; |
| const Elf_Internal_Rela *rel, *relend; |
| |
| if ((sec->flags & SEC_ALLOC) == 0) |
| return TRUE; |
| |
| elf_section_data (sec)->local_dynrel = NULL; |
| |
| htab = ppc_hash_table (info); |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| local_got_ents = elf_local_got_ents (abfd); |
| |
| relend = relocs + sec->reloc_count; |
| for (rel = relocs; rel < relend; rel++) |
| { |
| unsigned long r_symndx; |
| enum elf_ppc64_reloc_type r_type; |
| struct elf_link_hash_entry *h = NULL; |
| char tls_type = 0; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| r_type = ELF64_R_TYPE (rel->r_info); |
| if (r_symndx >= symtab_hdr->sh_info) |
| { |
| struct ppc_link_hash_entry *eh; |
| struct ppc_dyn_relocs **pp; |
| struct ppc_dyn_relocs *p; |
| |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| eh = (struct ppc_link_hash_entry *) h; |
| |
| for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| if (p->sec == sec) |
| { |
| /* Everything must go for SEC. */ |
| *pp = p->next; |
| break; |
| } |
| } |
| |
| switch (r_type) |
| { |
| case R_PPC64_GOT_TLSLD16: |
| case R_PPC64_GOT_TLSLD16_LO: |
| case R_PPC64_GOT_TLSLD16_HI: |
| case R_PPC64_GOT_TLSLD16_HA: |
| ppc64_tlsld_got (abfd)->refcount -= 1; |
| tls_type = TLS_TLS | TLS_LD; |
| goto dogot; |
| |
| case R_PPC64_GOT_TLSGD16: |
| case R_PPC64_GOT_TLSGD16_LO: |
| case R_PPC64_GOT_TLSGD16_HI: |
| case R_PPC64_GOT_TLSGD16_HA: |
| tls_type = TLS_TLS | TLS_GD; |
| goto dogot; |
| |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| case R_PPC64_GOT_TPREL16_HI: |
| case R_PPC64_GOT_TPREL16_HA: |
| tls_type = TLS_TLS | TLS_TPREL; |
| goto dogot; |
| |
| case R_PPC64_GOT_DTPREL16_DS: |
| case R_PPC64_GOT_DTPREL16_LO_DS: |
| case R_PPC64_GOT_DTPREL16_HI: |
| case R_PPC64_GOT_DTPREL16_HA: |
| tls_type = TLS_TLS | TLS_DTPREL; |
| goto dogot; |
| |
| case R_PPC64_GOT16: |
| case R_PPC64_GOT16_DS: |
| case R_PPC64_GOT16_HA: |
| case R_PPC64_GOT16_HI: |
| case R_PPC64_GOT16_LO: |
| case R_PPC64_GOT16_LO_DS: |
| dogot: |
| { |
| struct got_entry *ent; |
| |
| if (h != NULL) |
| ent = h->got.glist; |
| else |
| ent = local_got_ents[r_symndx]; |
| |
| for (; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend |
| && ent->owner == abfd |
| && ent->tls_type == tls_type) |
| break; |
| if (ent == NULL) |
| abort (); |
| if (ent->got.refcount > 0) |
| ent->got.refcount -= 1; |
| } |
| break; |
| |
| case R_PPC64_PLT16_HA: |
| case R_PPC64_PLT16_HI: |
| case R_PPC64_PLT16_LO: |
| case R_PPC64_PLT32: |
| case R_PPC64_PLT64: |
| case R_PPC64_REL14: |
| case R_PPC64_REL14_BRNTAKEN: |
| case R_PPC64_REL14_BRTAKEN: |
| case R_PPC64_REL24: |
| if (h != NULL) |
| { |
| struct plt_entry *ent; |
| |
| for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend) |
| break; |
| if (ent == NULL) |
| abort (); |
| if (ent->plt.refcount > 0) |
| ent->plt.refcount -= 1; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| return TRUE; |
| } |
| |
| /* The maximum size of .sfpr. */ |
| #define SFPR_MAX (218*4) |
| |
| struct sfpr_def_parms |
| { |
| const char name[12]; |
| unsigned char lo, hi; |
| bfd_byte * (*write_ent) (bfd *, bfd_byte *, int); |
| bfd_byte * (*write_tail) (bfd *, bfd_byte *, int); |
| }; |
| |
| /* Auto-generate _save*, _rest* functions in .sfpr. */ |
| |
| static unsigned int |
| sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm) |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| unsigned int i; |
| size_t len = strlen (parm->name); |
| bfd_boolean writing = FALSE; |
| char sym[16]; |
| |
| memcpy (sym, parm->name, len); |
| sym[len + 2] = 0; |
| |
| for (i = parm->lo; i <= parm->hi; i++) |
| { |
| struct elf_link_hash_entry *h; |
| |
| sym[len + 0] = i / 10 + '0'; |
| sym[len + 1] = i % 10 + '0'; |
| h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE); |
| if (h != NULL |
| && !h->def_regular) |
| { |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = htab->sfpr; |
| h->root.u.def.value = htab->sfpr->size; |
| h->type = STT_FUNC; |
| h->def_regular = 1; |
| _bfd_elf_link_hash_hide_symbol (info, h, TRUE); |
| writing = TRUE; |
| if (htab->sfpr->contents == NULL) |
| { |
| htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX); |
| if (htab->sfpr->contents == NULL) |
| return FALSE; |
| } |
| } |
| if (writing) |
| { |
| bfd_byte *p = htab->sfpr->contents + htab->sfpr->size; |
| if (i != parm->hi) |
| p = (*parm->write_ent) (htab->elf.dynobj, p, i); |
| else |
| p = (*parm->write_tail) (htab->elf.dynobj, p, i); |
| htab->sfpr->size = p - htab->sfpr->contents; |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| static bfd_byte * |
| savegpr0 (bfd *abfd, bfd_byte *p, int r) |
| { |
| bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| savegpr0_tail (bfd *abfd, bfd_byte *p, int r) |
| { |
| p = savegpr0 (abfd, p, r); |
| bfd_put_32 (abfd, STD_R0_0R1 + 16, p); |
| p = p + 4; |
| bfd_put_32 (abfd, BLR, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| restgpr0 (bfd *abfd, bfd_byte *p, int r) |
| { |
| bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| restgpr0_tail (bfd *abfd, bfd_byte *p, int r) |
| { |
| bfd_put_32 (abfd, LD_R0_0R1 + 16, p); |
| p = p + 4; |
| p = restgpr0 (abfd, p, r); |
| bfd_put_32 (abfd, MTLR_R0, p); |
| p = p + 4; |
| if (r == 29) |
| { |
| p = restgpr0 (abfd, p, 30); |
| p = restgpr0 (abfd, p, 31); |
| } |
| bfd_put_32 (abfd, BLR, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| savegpr1 (bfd *abfd, bfd_byte *p, int r) |
| { |
| bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| savegpr1_tail (bfd *abfd, bfd_byte *p, int r) |
| { |
| p = savegpr1 (abfd, p, r); |
| bfd_put_32 (abfd, BLR, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| restgpr1 (bfd *abfd, bfd_byte *p, int r) |
| { |
| bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| restgpr1_tail (bfd *abfd, bfd_byte *p, int r) |
| { |
| p = restgpr1 (abfd, p, r); |
| bfd_put_32 (abfd, BLR, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| savefpr (bfd *abfd, bfd_byte *p, int r) |
| { |
| bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| savefpr0_tail (bfd *abfd, bfd_byte *p, int r) |
| { |
| p = savefpr (abfd, p, r); |
| bfd_put_32 (abfd, STD_R0_0R1 + 16, p); |
| p = p + 4; |
| bfd_put_32 (abfd, BLR, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| restfpr (bfd *abfd, bfd_byte *p, int r) |
| { |
| bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| restfpr0_tail (bfd *abfd, bfd_byte *p, int r) |
| { |
| bfd_put_32 (abfd, LD_R0_0R1 + 16, p); |
| p = p + 4; |
| p = restfpr (abfd, p, r); |
| bfd_put_32 (abfd, MTLR_R0, p); |
| p = p + 4; |
| if (r == 29) |
| { |
| p = restfpr (abfd, p, 30); |
| p = restfpr (abfd, p, 31); |
| } |
| bfd_put_32 (abfd, BLR, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| savefpr1_tail (bfd *abfd, bfd_byte *p, int r) |
| { |
| p = savefpr (abfd, p, r); |
| bfd_put_32 (abfd, BLR, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| restfpr1_tail (bfd *abfd, bfd_byte *p, int r) |
| { |
| p = restfpr (abfd, p, r); |
| bfd_put_32 (abfd, BLR, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| savevr (bfd *abfd, bfd_byte *p, int r) |
| { |
| bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); |
| p = p + 4; |
| bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| savevr_tail (bfd *abfd, bfd_byte *p, int r) |
| { |
| p = savevr (abfd, p, r); |
| bfd_put_32 (abfd, BLR, p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| restvr (bfd *abfd, bfd_byte *p, int r) |
| { |
| bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); |
| p = p + 4; |
| bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p); |
| return p + 4; |
| } |
| |
| static bfd_byte * |
| restvr_tail (bfd *abfd, bfd_byte *p, int r) |
| { |
| p = restvr (abfd, p, r); |
| bfd_put_32 (abfd, BLR, p); |
| return p + 4; |
| } |
| |
| /* Called via elf_link_hash_traverse to transfer dynamic linking |
| information on function code symbol entries to their corresponding |
| function descriptor symbol entries. */ |
| |
| static bfd_boolean |
| func_desc_adjust (struct elf_link_hash_entry *h, void *inf) |
| { |
| struct bfd_link_info *info; |
| struct ppc_link_hash_table *htab; |
| struct plt_entry *ent; |
| struct ppc_link_hash_entry *fh; |
| struct ppc_link_hash_entry *fdh; |
| bfd_boolean force_local; |
| |
| fh = (struct ppc_link_hash_entry *) h; |
| if (fh->elf.root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (fh->elf.root.type == bfd_link_hash_warning) |
| fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link; |
| |
| info = inf; |
| htab = ppc_hash_table (info); |
| |
| /* Resolve undefined references to dot-symbols as the value |
| in the function descriptor, if we have one in a regular object. |
| This is to satisfy cases like ".quad .foo". Calls to functions |
| in dynamic objects are handled elsewhere. */ |
| if (fh->elf.root.type == bfd_link_hash_undefweak |
| && fh->was_undefined |
| && (fh->oh->elf.root.type == bfd_link_hash_defined |
| || fh->oh->elf.root.type == bfd_link_hash_defweak) |
| && get_opd_info (fh->oh->elf.root.u.def.section) != NULL |
| && opd_entry_value (fh->oh->elf.root.u.def.section, |
| fh->oh->elf.root.u.def.value, |
| &fh->elf.root.u.def.section, |
| &fh->elf.root.u.def.value) != (bfd_vma) -1) |
| { |
| fh->elf.root.type = fh->oh->elf.root.type; |
| fh->elf.forced_local = 1; |
| fh->elf.def_regular = fh->oh->elf.def_regular; |
| fh->elf.def_dynamic = fh->oh->elf.def_dynamic; |
| } |
| |
| /* If this is a function code symbol, transfer dynamic linking |
| information to the function descriptor symbol. */ |
| if (!fh->is_func) |
| return TRUE; |
| |
| for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next) |
| if (ent->plt.refcount > 0) |
| break; |
| if (ent == NULL |
| || fh->elf.root.root.string[0] != '.' |
| || fh->elf.root.root.string[1] == '\0') |
| return TRUE; |
| |
| /* Find the corresponding function descriptor symbol. Create it |
| as undefined if necessary. */ |
| |
| fdh = get_fdh (fh, htab); |
| if (fdh != NULL) |
| while (fdh->elf.root.type == bfd_link_hash_indirect |
| || fdh->elf.root.type == bfd_link_hash_warning) |
| fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link; |
| |
| if (fdh == NULL |
| && info->shared |
| && (fh->elf.root.type == bfd_link_hash_undefined |
| || fh->elf.root.type == bfd_link_hash_undefweak)) |
| { |
| fdh = make_fdh (info, fh); |
| if (fdh == NULL) |
| return FALSE; |
| } |
| |
| /* Fake function descriptors are made undefweak. If the function |
| code symbol is strong undefined, make the fake sym the same. |
| If the function code symbol is defined, then force the fake |
| descriptor local; We can't support overriding of symbols in a |
| shared library on a fake descriptor. */ |
| |
| if (fdh != NULL |
| && fdh->fake |
| && fdh->elf.root.type == bfd_link_hash_undefweak) |
| { |
| if (fh->elf.root.type == bfd_link_hash_undefined) |
| { |
| fdh->elf.root.type = bfd_link_hash_undefined; |
| bfd_link_add_undef (&htab->elf.root, &fdh->elf.root); |
| } |
| else if (fh->elf.root.type == bfd_link_hash_defined |
| || fh->elf.root.type == bfd_link_hash_defweak) |
| { |
| _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE); |
| } |
| } |
| |
| if (fdh != NULL |
| && !fdh->elf.forced_local |
| && (info->shared |
| || fdh->elf.def_dynamic |
| || fdh->elf.ref_dynamic |
| || (fdh->elf.root.type == bfd_link_hash_undefweak |
| && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT))) |
| { |
| if (fdh->elf.dynindx == -1) |
| if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf)) |
| return FALSE; |
| fdh->elf.ref_regular |= fh->elf.ref_regular; |
| fdh->elf.ref_dynamic |= fh->elf.ref_dynamic; |
| fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak; |
| fdh->elf.non_got_ref |= fh->elf.non_got_ref; |
| if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT) |
| { |
| move_plt_plist (fh, fdh); |
| fdh->elf.needs_plt = 1; |
| } |
| fdh->is_func_descriptor = 1; |
| fdh->oh = fh; |
| fh->oh = fdh; |
| } |
| |
| /* Now that the info is on the function descriptor, clear the |
| function code sym info. Any function code syms for which we |
| don't have a definition in a regular file, we force local. |
| This prevents a shared library from exporting syms that have |
| been imported from another library. Function code syms that |
| are really in the library we must leave global to prevent the |
| linker dragging in a definition from a static library. */ |
| force_local = (!fh->elf.def_regular |
| || fdh == NULL |
| || !fdh->elf.def_regular |
| || fdh->elf.forced_local); |
| _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); |
| |
| return TRUE; |
| } |
| |
| /* Called near the start of bfd_elf_size_dynamic_sections. We use |
| this hook to a) provide some gcc support functions, and b) transfer |
| dynamic linking information gathered so far on function code symbol |
| entries, to their corresponding function descriptor symbol entries. */ |
| |
| static bfd_boolean |
| ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info) |
| { |
| struct ppc_link_hash_table *htab; |
| unsigned int i; |
| const struct sfpr_def_parms funcs[] = |
| { |
| { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail }, |
| { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail }, |
| { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail }, |
| { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail }, |
| { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail }, |
| { "_savefpr_", 14, 31, savefpr, savefpr0_tail }, |
| { "_restfpr_", 14, 29, restfpr, restfpr0_tail }, |
| { "_restfpr_", 30, 31, restfpr, restfpr0_tail }, |
| { "._savef", 14, 31, savefpr, savefpr1_tail }, |
| { "._restf", 14, 31, restfpr, restfpr1_tail }, |
| { "_savevr_", 20, 31, savevr, savevr_tail }, |
| { "_restvr_", 20, 31, restvr, restvr_tail } |
| }; |
| |
| htab = ppc_hash_table (info); |
| if (htab->sfpr == NULL) |
| /* We don't have any relocs. */ |
| return TRUE; |
| |
| /* Provide any missing _save* and _rest* functions. */ |
| htab->sfpr->size = 0; |
| for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++) |
| if (!sfpr_define (info, &funcs[i])) |
| return FALSE; |
| |
| elf_link_hash_traverse (&htab->elf, func_desc_adjust, info); |
| |
| if (htab->sfpr->size == 0) |
| htab->sfpr->flags |= SEC_EXCLUDE; |
| |
| return TRUE; |
| } |
| |
| /* Adjust a symbol defined by a dynamic object and referenced by a |
| regular object. The current definition is in some section of the |
| dynamic object, but we're not including those sections. We have to |
| change the definition to something the rest of the link can |
| understand. */ |
| |
| static bfd_boolean |
| ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| struct elf_link_hash_entry *h) |
| { |
| struct ppc_link_hash_table *htab; |
| asection *s; |
| |
| htab = ppc_hash_table (info); |
| |
| /* Deal with function syms. */ |
| if (h->type == STT_FUNC |
| || h->needs_plt) |
| { |
| /* Clear procedure linkage table information for any symbol that |
| won't need a .plt entry. */ |
| struct plt_entry *ent; |
| for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| if (ent->plt.refcount > 0) |
| break; |
| if (ent == NULL |
| || SYMBOL_CALLS_LOCAL (info, h) |
| || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| && h->root.type == bfd_link_hash_undefweak)) |
| { |
| h->plt.plist = NULL; |
| h->needs_plt = 0; |
| } |
| } |
| else |
| h->plt.plist = NULL; |
| |
| /* If this is a weak symbol, and there is a real definition, the |
| processor independent code will have arranged for us to see the |
| real definition first, and we can just use the same value. */ |
| if (h->u.weakdef != NULL) |
| { |
| BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| if (ELIMINATE_COPY_RELOCS) |
| h->non_got_ref = h->u.weakdef->non_got_ref; |
| return TRUE; |
| } |
| |
| /* If we are creating a shared library, we must presume that the |
| only references to the symbol are via the global offset table. |
| For such cases we need not do anything here; the relocations will |
| be handled correctly by relocate_section. */ |
| if (info->shared) |
| return TRUE; |
| |
| /* If there are no references to this symbol that do not use the |
| GOT, we don't need to generate a copy reloc. */ |
| if (!h->non_got_ref) |
| return TRUE; |
| |
| /* Don't generate a copy reloc for symbols defined in the executable. */ |
| if (!h->def_dynamic || !h->ref_regular || h->def_regular) |
| return TRUE; |
| |
| if (ELIMINATE_COPY_RELOCS) |
| { |
| struct ppc_link_hash_entry * eh; |
| struct ppc_dyn_relocs *p; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| { |
| s = p->sec->output_section; |
| if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| break; |
| } |
| |
| /* If we didn't find any dynamic relocs in read-only sections, then |
| we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| if (p == NULL) |
| { |
| h->non_got_ref = 0; |
| return TRUE; |
| } |
| } |
| |
| if (h->plt.plist != NULL) |
| { |
| /* We should never get here, but unfortunately there are versions |
| of gcc out there that improperly (for this ABI) put initialized |
| function pointers, vtable refs and suchlike in read-only |
| sections. Allow them to proceed, but warn that this might |
| break at runtime. */ |
| (*_bfd_error_handler) |
| (_("copy reloc against `%s' requires lazy plt linking; " |
| "avoid setting LD_BIND_NOW=1 or upgrade gcc"), |
| h->root.root.string); |
| } |
| |
| /* This is a reference to a symbol defined by a dynamic object which |
| is not a function. */ |
| |
| if (h->size == 0) |
| { |
| (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), |
| h->root.root.string); |
| return TRUE; |
| } |
| |
| /* We must allocate the symbol in our .dynbss section, which will |
| become part of the .bss section of the executable. There will be |
| an entry for this symbol in the .dynsym section. The dynamic |
| object will contain position independent code, so all references |
| from the dynamic object to this symbol will go through the global |
| offset table. The dynamic linker will use the .dynsym entry to |
| determine the address it must put in the global offset table, so |
| both the dynamic object and the regular object will refer to the |
| same memory location for the variable. */ |
| |
| /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker |
| to copy the initial value out of the dynamic object and into the |
| runtime process image. We need to remember the offset into the |
| .rela.bss section we are going to use. */ |
| if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| { |
| htab->relbss->size += sizeof (Elf64_External_Rela); |
| h->needs_copy = 1; |
| } |
| |
| s = htab->dynbss; |
| |
| return _bfd_elf_adjust_dynamic_copy (h, s); |
| } |
| |
| /* If given a function descriptor symbol, hide both the function code |
| sym and the descriptor. */ |
| static void |
| ppc64_elf_hide_symbol (struct bfd_link_info *info, |
| struct elf_link_hash_entry *h, |
| bfd_boolean force_local) |
| { |
| struct ppc_link_hash_entry *eh; |
| _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| if (eh->is_func_descriptor) |
| { |
| struct ppc_link_hash_entry *fh = eh->oh; |
| |
| if (fh == NULL) |
| { |
| const char *p, *q; |
| struct ppc_link_hash_table *htab; |
| char save; |
| |
| /* We aren't supposed to use alloca in BFD because on |
| systems which do not have alloca the version in libiberty |
| calls xmalloc, which might cause the program to crash |
| when it runs out of memory. This function doesn't have a |
| return status, so there's no way to gracefully return an |
| error. So cheat. We know that string[-1] can be safely |
| accessed; It's either a string in an ELF string table, |
| or allocated in an objalloc structure. */ |
| |
| p = eh->elf.root.root.string - 1; |
| save = *p; |
| *(char *) p = '.'; |
| htab = ppc_hash_table (info); |
| fh = (struct ppc_link_hash_entry *) |
| elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); |
| *(char *) p = save; |
| |
| /* Unfortunately, if it so happens that the string we were |
| looking for was allocated immediately before this string, |
| then we overwrote the string terminator. That's the only |
| reason the lookup should fail. */ |
| if (fh == NULL) |
| { |
| q = eh->elf.root.root.string + strlen (eh->elf.root.root.string); |
| while (q >= eh->elf.root.root.string && *q == *p) |
| --q, --p; |
| if (q < eh->elf.root.root.string && *p == '.') |
| fh = (struct ppc_link_hash_entry *) |
| elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); |
| } |
| if (fh != NULL) |
| { |
| eh->oh = fh; |
| fh->oh = eh; |
| } |
| } |
| if (fh != NULL) |
| _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); |
| } |
| } |
| |
| static bfd_boolean |
| get_sym_h (struct elf_link_hash_entry **hp, |
| Elf_Internal_Sym **symp, |
| asection **symsecp, |
| char **tls_maskp, |
| Elf_Internal_Sym **locsymsp, |
| unsigned long r_symndx, |
| bfd *ibfd) |
| { |
| Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| |
| if (r_symndx >= symtab_hdr->sh_info) |
| { |
| struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
| struct elf_link_hash_entry *h; |
| |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| if (hp != NULL) |
| *hp = h; |
| |
| if (symp != NULL) |
| *symp = NULL; |
| |
| if (symsecp != NULL) |
| { |
| asection *symsec = NULL; |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| symsec = h->root.u.def.section; |
| *symsecp = symsec; |
| } |
| |
| if (tls_maskp != NULL) |
| { |
| struct ppc_link_hash_entry *eh; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| *tls_maskp = &eh->tls_mask; |
| } |
| } |
| else |
| { |
| Elf_Internal_Sym *sym; |
| Elf_Internal_Sym *locsyms = *locsymsp; |
| |
| if (locsyms == NULL) |
| { |
| locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| if (locsyms == NULL) |
| locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| symtab_hdr->sh_info, |
| 0, NULL, NULL, NULL); |
| if (locsyms == NULL) |
| return FALSE; |
| *locsymsp = locsyms; |
| } |
| sym = locsyms + r_symndx; |
| |
| if (hp != NULL) |
| *hp = NULL; |
| |
| if (symp != NULL) |
| *symp = sym; |
| |
| if (symsecp != NULL) |
| { |
| asection *symsec = NULL; |
| if ((sym->st_shndx != SHN_UNDEF |
| && sym->st_shndx < SHN_LORESERVE) |
| || sym->st_shndx > SHN_HIRESERVE) |
| symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx); |
| *symsecp = symsec; |
| } |
| |
| if (tls_maskp != NULL) |
| { |
| struct got_entry **lgot_ents; |
| char *tls_mask; |
| |
| tls_mask = NULL; |
| lgot_ents = elf_local_got_ents (ibfd); |
| if (lgot_ents != NULL) |
| { |
| char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info); |
| tls_mask = &lgot_masks[r_symndx]; |
| } |
| *tls_maskp = tls_mask; |
| } |
| } |
| return TRUE; |
| } |
| |
| /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on |
| error, 2 on a toc GD type suitable for optimization, 3 on a toc LD |
| type suitable for optimization, and 1 otherwise. */ |
| |
| static int |
| get_tls_mask (char **tls_maskp, unsigned long *toc_symndx, |
| Elf_Internal_Sym **locsymsp, |
| const Elf_Internal_Rela *rel, bfd *ibfd) |
| { |
| unsigned long r_symndx; |
| int next_r; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| bfd_vma off; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) |
| return 0; |
| |
| if ((*tls_maskp != NULL && **tls_maskp != 0) |
| || sec == NULL |
| || ppc64_elf_section_data (sec)->sec_type != sec_toc) |
| return 1; |
| |
| /* Look inside a TOC section too. */ |
| if (h != NULL) |
| { |
| BFD_ASSERT (h->root.type == bfd_link_hash_defined); |
| off = h->root.u.def.value; |
| } |
| else |
| off = sym->st_value; |
| off += rel->r_addend; |
| BFD_ASSERT (off % 8 == 0); |
| r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8]; |
| next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1]; |
| if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) |
| return 0; |
| if (toc_symndx != NULL) |
| *toc_symndx = r_symndx; |
| if ((h == NULL |
| || ((h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| && !h->def_dynamic)) |
| && (next_r == -1 || next_r == -2)) |
| return 1 - next_r; |
| return 1; |
| } |
| |
| /* Adjust all global syms defined in opd sections. In gcc generated |
| code for the old ABI, these will already have been done. */ |
| |
| static bfd_boolean |
| adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) |
| { |
| struct ppc_link_hash_entry *eh; |
| asection *sym_sec; |
| long *opd_adjust; |
| |
| if (h->root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| if (h->root.type != bfd_link_hash_defined |
| && h->root.type != bfd_link_hash_defweak) |
| return TRUE; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| if (eh->adjust_done) |
| return TRUE; |
| |
| sym_sec = eh->elf.root.u.def.section; |
| opd_adjust = get_opd_info (sym_sec); |
| if (opd_adjust != NULL) |
| { |
| long adjust = opd_adjust[eh->elf.root.u.def.value / 8]; |
| if (adjust == -1) |
| { |
| /* This entry has been deleted. */ |
| asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section; |
| if (dsec == NULL) |
| { |
| for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next) |
| if (elf_discarded_section (dsec)) |
| { |
| ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec; |
| break; |
| } |
| } |
| eh->elf.root.u.def.value = 0; |
| eh->elf.root.u.def.section = dsec; |
| } |
| else |
| eh->elf.root.u.def.value += adjust; |
| eh->adjust_done = 1; |
| } |
| return TRUE; |
| } |
| |
| /* Handles decrementing dynamic reloc counts for the reloc specified by |
| R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC |
| have already been determined. */ |
| |
| static bfd_boolean |
| dec_dynrel_count (bfd_vma r_info, |
| asection *sec, |
| struct bfd_link_info *info, |
| Elf_Internal_Sym **local_syms, |
| struct elf_link_hash_entry *h, |
| asection *sym_sec) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| struct ppc_dyn_relocs *p; |
| struct ppc_dyn_relocs **pp; |
| |
| /* Can this reloc be dynamic? This switch, and later tests here |
| should be kept in sync with the code in check_relocs. */ |
| r_type = ELF64_R_TYPE (r_info); |
| switch (r_type) |
| { |
| default: |
| return TRUE; |
| |
| case R_PPC64_TPREL16: |
| case R_PPC64_TPREL16_LO: |
| case R_PPC64_TPREL16_HI: |
| case R_PPC64_TPREL16_HA: |
| case R_PPC64_TPREL16_DS: |
| case R_PPC64_TPREL16_LO_DS: |
| case R_PPC64_TPREL16_HIGHER: |
| case R_PPC64_TPREL16_HIGHERA: |
| case R_PPC64_TPREL16_HIGHEST: |
| case R_PPC64_TPREL16_HIGHESTA: |
| if (!info->shared) |
| return TRUE; |
| |
| case R_PPC64_TPREL64: |
| case R_PPC64_DTPMOD64: |
| case R_PPC64_DTPREL64: |
| case R_PPC64_ADDR64: |
| case R_PPC64_REL30: |
| case R_PPC64_REL32: |
| case R_PPC64_REL64: |
| case R_PPC64_ADDR14: |
| case R_PPC64_ADDR14_BRNTAKEN: |
| case R_PPC64_ADDR14_BRTAKEN: |
| case R_PPC64_ADDR16: |
| case R_PPC64_ADDR16_DS: |
| case R_PPC64_ADDR16_HA: |
| case R_PPC64_ADDR16_HI: |
| case R_PPC64_ADDR16_HIGHER: |
| case R_PPC64_ADDR16_HIGHERA: |
| case R_PPC64_ADDR16_HIGHEST: |
| case R_PPC64_ADDR16_HIGHESTA: |
| case R_PPC64_ADDR16_LO: |
| case R_PPC64_ADDR16_LO_DS: |
| case R_PPC64_ADDR24: |
| case R_PPC64_ADDR32: |
| case R_PPC64_UADDR16: |
| case R_PPC64_UADDR32: |
| case R_PPC64_UADDR64: |
| case R_PPC64_TOC: |
| break; |
| } |
| |
| if (local_syms != NULL) |
| { |
| unsigned long r_symndx; |
| Elf_Internal_Sym *sym; |
| bfd *ibfd = sec->owner; |
| |
| r_symndx = ELF64_R_SYM (r_info); |
| if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd)) |
| return FALSE; |
| } |
| |
| if ((info->shared |
| && (MUST_BE_DYN_RELOC (r_type) |
| || (h != NULL |
| && (!info->symbolic |
| || h->root.type == bfd_link_hash_defweak |
| || !h->def_regular)))) |
| || (ELIMINATE_COPY_RELOCS |
| && !info->shared |
| && h != NULL |
| && (h->root.type == bfd_link_hash_defweak |
| || !h->def_regular))) |
| ; |
| else |
| return TRUE; |
| |
| if (h != NULL) |
| pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs; |
| else |
| { |
| if (sym_sec != NULL) |
| { |
| void *vpp = &elf_section_data (sym_sec)->local_dynrel; |
| pp = (struct ppc_dyn_relocs **) vpp; |
| } |
| else |
| { |
| void *vpp = &elf_section_data (sec)->local_dynrel; |
| pp = (struct ppc_dyn_relocs **) vpp; |
| } |
| |
| /* elf_gc_sweep may have already removed all dyn relocs associated |
| with local syms for a given section. Don't report a dynreloc |
| miscount. */ |
| if (*pp == NULL) |
| return TRUE; |
| } |
| |
| while ((p = *pp) != NULL) |
| { |
| if (p->sec == sec) |
| { |
| if (!MUST_BE_DYN_RELOC (r_type)) |
| p->pc_count -= 1; |
| p->count -= 1; |
| if (p->count == 0) |
| *pp = p->next; |
| return TRUE; |
| } |
| pp = &p->next; |
| } |
| |
| (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"), |
| sec->owner, sec); |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| |
| /* Remove unused Official Procedure Descriptor entries. Currently we |
| only remove those associated with functions in discarded link-once |
| sections, or weakly defined functions that have been overridden. It |
| would be possible to remove many more entries for statically linked |
| applications. */ |
| |
| bfd_boolean |
| ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info, |
| bfd_boolean no_opd_opt, |
| bfd_boolean non_overlapping) |
| { |
| bfd *ibfd; |
| bfd_boolean some_edited = FALSE; |
| asection *need_pad = NULL; |
| |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| { |
| asection *sec; |
| Elf_Internal_Rela *relstart, *rel, *relend; |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf_Internal_Sym *local_syms; |
| struct elf_link_hash_entry **sym_hashes; |
| bfd_vma offset; |
| bfd_size_type amt; |
| long *opd_adjust; |
| bfd_boolean need_edit, add_aux_fields; |
| bfd_size_type cnt_16b = 0; |
| |
| sec = bfd_get_section_by_name (ibfd, ".opd"); |
| if (sec == NULL || sec->size == 0) |
| continue; |
| |
| amt = sec->size * sizeof (long) / 8; |
| opd_adjust = get_opd_info (sec); |
| if (opd_adjust == NULL) |
| { |
| /* check_relocs hasn't been called. Must be a ld -r link |
| or --just-symbols object. */ |
| opd_adjust = bfd_alloc (obfd, amt); |
| if (opd_adjust == NULL) |
| return FALSE; |
| ppc64_elf_section_data (sec)->u.opd_adjust = opd_adjust; |
| BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal); |
| ppc64_elf_section_data (sec)->sec_type = sec_opd; |
| } |
| memset (opd_adjust, 0, amt); |
| |
| if (no_opd_opt) |
| continue; |
| |
| if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS) |
| continue; |
| |
| if (sec->output_section == bfd_abs_section_ptr) |
| continue; |
| |
| /* Look through the section relocs. */ |
| if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0) |
| continue; |
| |
| local_syms = NULL; |
| symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (ibfd); |
| |
| /* Read the relocations. */ |
| relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| info->keep_memory); |
| if (relstart == NULL) |
| return FALSE; |
| |
| /* First run through the relocs to check they are sane, and to |
| determine whether we need to edit this opd section. */ |
| need_edit = FALSE; |
| need_pad = sec; |
| offset = 0; |
| relend = relstart + sec->reloc_count; |
| for (rel = relstart; rel < relend; ) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| unsigned long r_symndx; |
| asection *sym_sec; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| |
| /* .opd contains a regular array of 16 or 24 byte entries. We're |
| only interested in the reloc pointing to a function entry |
| point. */ |
| if (rel->r_offset != offset |
| || rel + 1 >= relend |
| || (rel + 1)->r_offset != offset + 8) |
| { |
| /* If someone messes with .opd alignment then after a |
| "ld -r" we might have padding in the middle of .opd. |
| Also, there's nothing to prevent someone putting |
| something silly in .opd with the assembler. No .opd |
| optimization for them! */ |
| broken_opd: |
| (*_bfd_error_handler) |
| (_("%B: .opd is not a regular array of opd entries"), ibfd); |
| need_edit = FALSE; |
| break; |
| } |
| |
| if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64 |
| || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC) |
| { |
| (*_bfd_error_handler) |
| (_("%B: unexpected reloc type %u in .opd section"), |
| ibfd, r_type); |
| need_edit = FALSE; |
| break; |
| } |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| r_symndx, ibfd)) |
| goto error_ret; |
| |
| if (sym_sec == NULL || sym_sec->owner == NULL) |
| { |
| const char *sym_name; |
| if (h != NULL) |
| sym_name = h->root.root.string; |
| else |
| sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym, |
| sym_sec); |
| |
| (*_bfd_error_handler) |
| (_("%B: undefined sym `%s' in .opd section"), |
| ibfd, sym_name); |
| need_edit = FALSE; |
| break; |
| } |
| |
| /* opd entries are always for functions defined in the |
| current input bfd. If the symbol isn't defined in the |
| input bfd, then we won't be using the function in this |
| bfd; It must be defined in a linkonce section in another |
| bfd, or is weak. It's also possible that we are |
| discarding the function due to a linker script /DISCARD/, |
| which we test for via the output_section. */ |
| if (sym_sec->owner != ibfd |
| || sym_sec->output_section == bfd_abs_section_ptr) |
| need_edit = TRUE; |
| |
| rel += 2; |
| if (rel == relend |
| || (rel + 1 == relend && rel->r_offset == offset + 16)) |
| { |
| if (sec->size == offset + 24) |
| { |
| need_pad = NULL; |
| break; |
| } |
| if (rel == relend && sec->size == offset + 16) |
| { |
| cnt_16b++; |
| break; |
| } |
| goto broken_opd; |
| } |
| |
| if (rel->r_offset == offset + 24) |
| offset += 24; |
| else if (rel->r_offset != offset + 16) |
| goto broken_opd; |
| else if (rel + 1 < relend |
| && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64 |
| && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC) |
| { |
| offset += 16; |
| cnt_16b++; |
| } |
| else if (rel + 2 < relend |
| && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64 |
| && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC) |
| { |
| offset += 24; |
| rel += 1; |
| } |
| else |
| goto broken_opd; |
| } |
| |
| add_aux_fields = non_overlapping && cnt_16b > 0; |
| |
| if (need_edit || add_aux_fields) |
| { |
| Elf_Internal_Rela *write_rel; |
| bfd_byte *rptr, *wptr; |
| bfd_byte *new_contents = NULL; |
| bfd_boolean skip; |
| long opd_ent_size; |
| |
| /* This seems a waste of time as input .opd sections are all |
| zeros as generated by gcc, but I suppose there's no reason |
| this will always be so. We might start putting something in |
| the third word of .opd entries. */ |
| if ((sec->flags & SEC_IN_MEMORY) == 0) |
| { |
| bfd_byte *loc; |
| if (!bfd_malloc_and_get_section (ibfd, sec, &loc)) |
| { |
| if (loc != NULL) |
| free (loc); |
| error_ret: |
| if (local_syms != NULL |
| && symtab_hdr->contents != (unsigned char *) local_syms) |
| free (local_syms); |
| if (elf_section_data (sec)->relocs != relstart) |
| free (relstart); |
| return FALSE; |
| } |
| sec->contents = loc; |
| sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); |
| } |
| |
| elf_section_data (sec)->relocs = relstart; |
| |
| new_contents = sec->contents; |
| if (add_aux_fields) |
| { |
| new_contents = bfd_malloc (sec->size + cnt_16b * 8); |
| if (new_contents == NULL) |
| return FALSE; |
| need_pad = FALSE; |
| } |
| wptr = new_contents; |
| rptr = sec->contents; |
| |
| write_rel = relstart; |
| skip = FALSE; |
| offset = 0; |
| opd_ent_size = 0; |
| for (rel = relstart; rel < relend; rel++) |
| { |
| unsigned long r_symndx; |
| asection *sym_sec; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| r_symndx, ibfd)) |
| goto error_ret; |
| |
| if (rel->r_offset == offset) |
| { |
| struct ppc_link_hash_entry *fdh = NULL; |
| |
| /* See if the .opd entry is full 24 byte or |
| 16 byte (with fd_aux entry overlapped with next |
| fd_func). */ |
| opd_ent_size = 24; |
| if ((rel + 2 == relend && sec->size == offset + 16) |
| || (rel + 3 < relend |
| && rel[2].r_offset == offset + 16 |
| && rel[3].r_offset == offset + 24 |
| && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64 |
| && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC)) |
| opd_ent_size = 16; |
| |
| if (h != NULL |
| && h->root.root.string[0] == '.') |
| { |
| fdh = get_fdh ((struct ppc_link_hash_entry *) h, |
| ppc_hash_table (info)); |
| if (fdh != NULL |
| && fdh->elf.root.type != bfd_link_hash_defined |
| && fdh->elf.root.type != bfd_link_hash_defweak) |
| fdh = NULL; |
| } |
| |
| skip = (sym_sec->owner != ibfd |
| || sym_sec->output_section == bfd_abs_section_ptr); |
| if (skip) |
| { |
| if (fdh != NULL && sym_sec->owner == ibfd) |
| { |
| /* Arrange for the function descriptor sym |
| to be dropped. */ |
| fdh->elf.root.u.def.value = 0; |
| fdh->elf.root.u.def.section = sym_sec; |
| } |
| opd_adjust[rel->r_offset / 8] = -1; |
| } |
| else |
| { |
| /* We'll be keeping this opd entry. */ |
| |
| if (fdh != NULL) |
| { |
| /* Redefine the function descriptor symbol to |
| this location in the opd section. It is |
| necessary to update the value here rather |
| than using an array of adjustments as we do |
| for local symbols, because various places |
| in the generic ELF code use the value |
| stored in u.def.value. */ |
| fdh->elf.root.u.def.value = wptr - new_contents; |
| fdh->adjust_done = 1; |
| } |
| |
| /* Local syms are a bit tricky. We could |
| tweak them as they can be cached, but |
| we'd need to look through the local syms |
| for the function descriptor sym which we |
| don't have at the moment. So keep an |
| array of adjustments. */ |
| opd_adjust[rel->r_offset / 8] |
| = (wptr - new_contents) - (rptr - sec->contents); |
| |
| if (wptr != rptr) |
| memcpy (wptr, rptr, opd_ent_size); |
| wptr += opd_ent_size; |
| if (add_aux_fields && opd_ent_size == 16) |
| { |
| memset (wptr, '\0', 8); |
| wptr += 8; |
| } |
| } |
| rptr += opd_ent_size; |
| offset += opd_ent_size; |
| } |
| |
| if (skip) |
| { |
| if (!NO_OPD_RELOCS |
| && !info->relocatable |
| && !dec_dynrel_count (rel->r_info, sec, info, |
| NULL, h, sym_sec)) |
| goto error_ret; |
| } |
| else |
| { |
| /* We need to adjust any reloc offsets to point to the |
| new opd entries. While we're at it, we may as well |
| remove redundant relocs. */ |
| rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8]; |
| if (write_rel != rel) |
| memcpy (write_rel, rel, sizeof (*rel)); |
| ++write_rel; |
| } |
| } |
| |
| sec->size = wptr - new_contents; |
| sec->reloc_count = write_rel - relstart; |
| if (add_aux_fields) |
| { |
| free (sec->contents); |
| sec->contents = new_contents; |
| } |
| |
| /* Fudge the header size too, as this is used later in |
| elf_bfd_final_link if we are emitting relocs. */ |
| elf_section_data (sec)->rel_hdr.sh_size |
| = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize; |
| BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL); |
| some_edited = TRUE; |
| } |
| else if (elf_section_data (sec)->relocs != relstart) |
| free (relstart); |
| |
| if (local_syms != NULL |
| && symtab_hdr->contents != (unsigned char *) local_syms) |
| { |
| if (!info->keep_memory) |
| free (local_syms); |
| else |
| symtab_hdr->contents = (unsigned char *) local_syms; |
| } |
| } |
| |
| if (some_edited) |
| elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL); |
| |
| /* If we are doing a final link and the last .opd entry is just 16 byte |
| long, add a 8 byte padding after it. */ |
| if (need_pad != NULL && !info->relocatable) |
| { |
| bfd_byte *p; |
| |
| if ((need_pad->flags & SEC_IN_MEMORY) == 0) |
| { |
| BFD_ASSERT (need_pad->size > 0); |
| |
| p = bfd_malloc (need_pad->size + 8); |
| if (p == NULL) |
| return FALSE; |
| |
| if (! bfd_get_section_contents (need_pad->owner, need_pad, |
| p, 0, need_pad->size)) |
| return FALSE; |
| |
| need_pad->contents = p; |
| need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); |
| } |
| else |
| { |
| p = bfd_realloc (need_pad->contents, need_pad->size + 8); |
| if (p == NULL) |
| return FALSE; |
| |
| need_pad->contents = p; |
| } |
| |
| memset (need_pad->contents + need_pad->size, 0, 8); |
| need_pad->size += 8; |
| } |
| |
| return TRUE; |
| } |
| |
| /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ |
| |
| asection * |
| ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) |
| { |
| struct ppc_link_hash_table *htab; |
| |
| htab = ppc_hash_table (info); |
| if (htab->tls_get_addr != NULL) |
| { |
| struct ppc_link_hash_entry *h = htab->tls_get_addr; |
| |
| while (h->elf.root.type == bfd_link_hash_indirect |
| || h->elf.root.type == bfd_link_hash_warning) |
| h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link; |
| |
| htab->tls_get_addr = h; |
| |
| if (htab->tls_get_addr_fd == NULL |
| && h->oh != NULL |
| && h->oh->is_func_descriptor |
| && (h->oh->elf.root.type == bfd_link_hash_defined |
| || h->oh->elf.root.type == bfd_link_hash_defweak)) |
| htab->tls_get_addr_fd = h->oh; |
| } |
| |
| if (htab->tls_get_addr_fd != NULL) |
| { |
| struct ppc_link_hash_entry *h = htab->tls_get_addr_fd; |
| |
| while (h->elf.root.type == bfd_link_hash_indirect |
| || h->elf.root.type == bfd_link_hash_warning) |
| h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link; |
| |
| htab->tls_get_addr_fd = h; |
| } |
| |
| return _bfd_elf_tls_setup (obfd, info); |
| } |
| |
| /* Run through all the TLS relocs looking for optimization |
| opportunities. The linker has been hacked (see ppc64elf.em) to do |
| a preliminary section layout so that we know the TLS segment |
| offsets. We can't optimize earlier because some optimizations need |
| to know the tp offset, and we need to optimize before allocating |
| dynamic relocations. */ |
| |
| bfd_boolean |
| ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) |
| { |
| bfd *ibfd; |
| asection *sec; |
| struct ppc_link_hash_table *htab; |
| |
| if (info->relocatable || info->shared) |
| return TRUE; |
| |
| htab = ppc_hash_table (info); |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| { |
| Elf_Internal_Sym *locsyms = NULL; |
| asection *toc = bfd_get_section_by_name (ibfd, ".toc"); |
| unsigned char *toc_ref = NULL; |
| |
| /* Look at all the sections for this file, with TOC last. */ |
| for (sec = (ibfd->sections == toc && toc && toc->next ? toc->next |
| : ibfd->sections); |
| sec != NULL; |
| sec = (sec == toc ? NULL |
| : sec->next == NULL ? toc |
| : sec->next == toc && toc->next ? toc->next |
| : sec->next)) |
| if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) |
| { |
| Elf_Internal_Rela *relstart, *rel, *relend; |
| int expecting_tls_get_addr; |
| long toc_ref_index = 0; |
| |
| /* Read the relocations. */ |
| relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| info->keep_memory); |
| if (relstart == NULL) |
| return FALSE; |
| |
| expecting_tls_get_addr = 0; |
| relend = relstart + sec->reloc_count; |
| for (rel = relstart; rel < relend; rel++) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| unsigned long r_symndx; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| asection *sym_sec; |
| char *tls_mask; |
| char tls_set, tls_clear, tls_type = 0; |
| bfd_vma value; |
| bfd_boolean ok_tprel, is_local; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms, |
| r_symndx, ibfd)) |
| { |
| err_free_rel: |
| if (elf_section_data (sec)->relocs != relstart) |
| free (relstart); |
| if (toc_ref != NULL) |
| free (toc_ref); |
| if (locsyms != NULL |
| && (elf_tdata (ibfd)->symtab_hdr.contents |
| != (unsigned char *) locsyms)) |
| free (locsyms); |
| return FALSE; |
| } |
| |
| if (h != NULL) |
| { |
| if (h->root.type != bfd_link_hash_defined |
| && h->root.type != bfd_link_hash_defweak) |
| continue; |
| value = h->root.u.def.value; |
| } |
| else |
| /* Symbols referenced by TLS relocs must be of type |
| STT_TLS. So no need for .opd local sym adjust. */ |
| value = sym->st_value; |
| |
| ok_tprel = FALSE; |
| is_local = FALSE; |
| if (h == NULL |
| || !h->def_dynamic) |
| { |
| is_local = TRUE; |
| value += sym_sec->output_offset; |
| value += sym_sec->output_section->vma; |
| value -= htab->elf.tls_sec->vma; |
| ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31) |
| < (bfd_vma) 1 << 32); |
| } |
| |
| r_type = ELF64_R_TYPE (rel->r_info); |
| switch (r_type) |
| { |
| case R_PPC64_GOT_TLSLD16: |
| case R_PPC64_GOT_TLSLD16_LO: |
| case R_PPC64_GOT_TLSLD16_HI: |
| case R_PPC64_GOT_TLSLD16_HA: |
| /* These relocs should never be against a symbol |
| defined in a shared lib. Leave them alone if |
| that turns out to be the case. */ |
| ppc64_tlsld_got (ibfd)->refcount -= 1; |
| if (!is_local) |
| continue; |
| |
| /* LD -> LE */ |
| tls_set = 0; |
| tls_clear = TLS_LD; |
| tls_type = TLS_TLS | TLS_LD; |
| expecting_tls_get_addr = 1; |
| break; |
| |
| case R_PPC64_GOT_TLSGD16: |
| case R_PPC64_GOT_TLSGD16_LO: |
| case R_PPC64_GOT_TLSGD16_HI: |
| case R_PPC64_GOT_TLSGD16_HA: |
| if (ok_tprel) |
| /* GD -> LE */ |
| tls_set = 0; |
| else |
| /* GD -> IE */ |
| tls_set = TLS_TLS | TLS_TPRELGD; |
| tls_clear = TLS_GD; |
| tls_type = TLS_TLS | TLS_GD; |
| expecting_tls_get_addr = 1; |
| break; |
| |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| case R_PPC64_GOT_TPREL16_HI: |
| case R_PPC64_GOT_TPREL16_HA: |
| expecting_tls_get_addr = 0; |
| if (ok_tprel) |
| { |
| /* IE -> LE */ |
| tls_set = 0; |
| tls_clear = TLS_TPREL; |
| tls_type = TLS_TLS | TLS_TPREL; |
| break; |
| } |
| else |
| continue; |
| |
| case R_PPC64_REL14: |
| case R_PPC64_REL14_BRTAKEN: |
| case R_PPC64_REL14_BRNTAKEN: |
| case R_PPC64_REL24: |
| if (h != NULL |
| && (h == &htab->tls_get_addr->elf |
| || h == &htab->tls_get_addr_fd->elf)) |
| { |
| if (!expecting_tls_get_addr |
| && rel != relstart |
| && ((ELF64_R_TYPE (rel[-1].r_info) |
| == R_PPC64_TOC16) |
| || (ELF64_R_TYPE (rel[-1].r_info) |
| == R_PPC64_TOC16_LO))) |
| { |
| /* Check for toc tls entries. */ |
| char *toc_tls; |
| int retval; |
| |
| retval = get_tls_mask (&toc_tls, NULL, &locsyms, |
| rel - 1, ibfd); |
| if (retval == 0) |
| goto err_free_rel; |
| if (retval > 1 && toc_tls != NULL) |
| { |
| expecting_tls_get_addr = 1; |
| if (toc_ref != NULL) |
| toc_ref[toc_ref_index] = 1; |
| } |
| } |
| |
| if (expecting_tls_get_addr) |
| { |
| struct plt_entry *ent; |
| for (ent = h->plt.plist; ent; ent = ent->next) |
| if (ent->addend == 0) |
| { |
| if (ent->plt.refcount > 0) |
| ent->plt.refcount -= 1; |
| break; |
| } |
| } |
| } |
| expecting_tls_get_addr = 0; |
| continue; |
| |
| case R_PPC64_TOC16: |
| case R_PPC64_TOC16_LO: |
| case R_PPC64_TLS: |
| expecting_tls_get_addr = 0; |
| if (sym_sec == toc && toc != NULL) |
| { |
| /* Mark this toc entry as referenced by a TLS |
| code sequence. We can do that now in the |
| case of R_PPC64_TLS, and after checking for |
| tls_get_addr for the TOC16 relocs. */ |
| if (toc_ref == NULL) |
| { |
| toc_ref = bfd_zmalloc (toc->size / 8); |
| if (toc_ref == NULL) |
| goto err_free_rel; |
| } |
| if (h != NULL) |
| value = h->root.u.def.value; |
| else |
| value = sym->st_value; |
| value += rel->r_addend; |
| BFD_ASSERT (value < toc->size && value % 8 == 0); |
| toc_ref_index = value / 8; |
| if (r_type == R_PPC64_TLS) |
| toc_ref[toc_ref_index] = 1; |
| } |
| continue; |
| |
| case R_PPC64_TPREL64: |
| expecting_tls_get_addr = 0; |
| if (sec != toc |
| || toc_ref == NULL |
| || !toc_ref[rel->r_offset / 8]) |
| continue; |
| if (ok_tprel) |
| { |
| /* IE -> LE */ |
| tls_set = TLS_EXPLICIT; |
| tls_clear = TLS_TPREL; |
| break; |
| } |
| else |
| continue; |
| |
| case R_PPC64_DTPMOD64: |
| expecting_tls_get_addr = 0; |
| if (sec != toc |
| || toc_ref == NULL |
| || !toc_ref[rel->r_offset / 8]) |
| continue; |
| if (rel + 1 < relend |
| && (rel[1].r_info |
| == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)) |
| && rel[1].r_offset == rel->r_offset + 8) |
| { |
| if (ok_tprel) |
| /* GD -> LE */ |
| tls_set = TLS_EXPLICIT | TLS_GD; |
| else |
| /* GD -> IE */ |
| tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD; |
| tls_clear = TLS_GD; |
| } |
| else |
| { |
| if (!is_local) |
| continue; |
| |
| /* LD -> LE */ |
| tls_set = TLS_EXPLICIT; |
| tls_clear = TLS_LD; |
| } |
| break; |
| |
| default: |
| expecting_tls_get_addr = 0; |
| continue; |
| } |
| |
| if ((tls_set & TLS_EXPLICIT) == 0) |
| { |
| struct got_entry *ent; |
| |
| /* Adjust got entry for this reloc. */ |
| if (h != NULL) |
| ent = h->got.glist; |
| else |
| ent = elf_local_got_ents (ibfd)[r_symndx]; |
| |
| for (; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend |
| && ent->owner == ibfd |
| && ent->tls_type == tls_type) |
| break; |
| if (ent == NULL) |
| abort (); |
| |
| if (tls_set == 0) |
| { |
| /* We managed to get rid of a got entry. */ |
| if (ent->got.refcount > 0) |
| ent->got.refcount -= 1; |
| } |
| } |
| else |
| { |
| /* If we got rid of a DTPMOD/DTPREL reloc pair then |
| we'll lose one or two dyn relocs. */ |
| if (!dec_dynrel_count (rel->r_info, sec, info, |
| NULL, h, sym_sec)) |
| return FALSE; |
| |
| if (tls_set == (TLS_EXPLICIT | TLS_GD)) |
| { |
| if (!dec_dynrel_count ((rel + 1)->r_info, sec, info, |
| NULL, h, sym_sec)) |
| return FALSE; |
| } |
| } |
| |
| *tls_mask |= tls_set; |
| *tls_mask &= ~tls_clear; |
| } |
| |
| if (elf_section_data (sec)->relocs != relstart) |
| free (relstart); |
| } |
| |
| if (toc_ref != NULL) |
| free (toc_ref); |
| |
| if (locsyms != NULL |
| && (elf_tdata (ibfd)->symtab_hdr.contents |
| != (unsigned char *) locsyms)) |
| { |
| if (!info->keep_memory) |
| free (locsyms); |
| else |
| elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms; |
| } |
| } |
| return TRUE; |
| } |
| |
| /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust |
| the values of any global symbols in a toc section that has been |
| edited. Globals in toc sections should be a rarity, so this function |
| sets a flag if any are found in toc sections other than the one just |
| edited, so that futher hash table traversals can be avoided. */ |
| |
| struct adjust_toc_info |
| { |
| asection *toc; |
| unsigned long *skip; |
| bfd_boolean global_toc_syms; |
| }; |
| |
| static bfd_boolean |
| adjust_toc_syms (struct elf_link_hash_entry *h, void *inf) |
| { |
| struct ppc_link_hash_entry *eh; |
| struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf; |
| |
| if (h->root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| if (h->root.type != bfd_link_hash_defined |
| && h->root.type != bfd_link_hash_defweak) |
| return TRUE; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| if (eh->adjust_done) |
| return TRUE; |
| |
| if (eh->elf.root.u.def.section == toc_inf->toc) |
| { |
| unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3]; |
| if (skip != (unsigned long) -1) |
| eh->elf.root.u.def.value -= skip; |
| else |
| { |
| (*_bfd_error_handler) |
| (_("%s defined in removed toc entry"), eh->elf.root.root.string); |
| eh->elf.root.u.def.section = &bfd_abs_section; |
| eh->elf.root.u.def.value = 0; |
| } |
| eh->adjust_done = 1; |
| } |
| else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0) |
| toc_inf->global_toc_syms = TRUE; |
| |
| return TRUE; |
| } |
| |
| /* Examine all relocs referencing .toc sections in order to remove |
| unused .toc entries. */ |
| |
| bfd_boolean |
| ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) |
| { |
| bfd *ibfd; |
| struct adjust_toc_info toc_inf; |
| |
| toc_inf.global_toc_syms = TRUE; |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| { |
| asection *toc, *sec; |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf_Internal_Sym *local_syms; |
| struct elf_link_hash_entry **sym_hashes; |
| Elf_Internal_Rela *relstart, *rel; |
| unsigned long *skip, *drop; |
| unsigned char *used; |
| unsigned char *keep, last, some_unused; |
| |
| toc = bfd_get_section_by_name (ibfd, ".toc"); |
| if (toc == NULL |
| || toc->size == 0 |
| || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS |
| || elf_discarded_section (toc)) |
| continue; |
| |
| local_syms = NULL; |
| symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (ibfd); |
| |
| /* Look at sections dropped from the final link. */ |
| skip = NULL; |
| relstart = NULL; |
| for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| { |
| if (sec->reloc_count == 0 |
| || !elf_discarded_section (sec) |
| || get_opd_info (sec) |
| || (sec->flags & SEC_ALLOC) == 0 |
| || (sec->flags & SEC_DEBUGGING) != 0) |
| continue; |
| |
| relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE); |
| if (relstart == NULL) |
| goto error_ret; |
| |
| /* Run through the relocs to see which toc entries might be |
| unused. */ |
| for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| unsigned long r_symndx; |
| asection *sym_sec; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| bfd_vma val; |
| |
| r_type = ELF64_R_TYPE (rel->r_info); |
| switch (r_type) |
| { |
| default: |
| continue; |
| |
| case R_PPC64_TOC16: |
| case R_PPC64_TOC16_LO: |
| case R_PPC64_TOC16_HI: |
| case R_PPC64_TOC16_HA: |
| case R_PPC64_TOC16_DS: |
| case R_PPC64_TOC16_LO_DS: |
| break; |
| } |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| r_symndx, ibfd)) |
| goto error_ret; |
| |
| if (sym_sec != toc) |
| continue; |
| |
| if (h != NULL) |
| val = h->root.u.def.value; |
| else |
| val = sym->st_value; |
| val += rel->r_addend; |
| |
| if (val >= toc->size) |
| continue; |
| |
| /* Anything in the toc ought to be aligned to 8 bytes. |
| If not, don't mark as unused. */ |
| if (val & 7) |
| continue; |
| |
| if (skip == NULL) |
| { |
| skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8); |
| if (skip == NULL) |
| goto error_ret; |
| } |
| |
| skip[val >> 3] = 1; |
| } |
| |
| if (elf_section_data (sec)->relocs != relstart) |
| free (relstart); |
| } |
| |
| if (skip == NULL) |
| continue; |
| |
| used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8); |
| if (used == NULL) |
| { |
| error_ret: |
| if (local_syms != NULL |
| && symtab_hdr->contents != (unsigned char *) local_syms) |
| free (local_syms); |
| if (sec != NULL |
| && relstart != NULL |
| && elf_section_data (sec)->relocs != relstart) |
| free (relstart); |
| if (skip != NULL) |
| free (skip); |
| return FALSE; |
| } |
| |
| /* Now check all kept sections that might reference the toc. |
| Check the toc itself last. */ |
| for (sec = (ibfd->sections == toc && toc->next ? toc->next |
| : ibfd->sections); |
| sec != NULL; |
| sec = (sec == toc ? NULL |
| : sec->next == NULL ? toc |
| : sec->next == toc && toc->next ? toc->next |
| : sec->next)) |
| { |
| int repeat; |
| |
| if (sec->reloc_count == 0 |
| || elf_discarded_section (sec) |
| || get_opd_info (sec) |
| || (sec->flags & SEC_ALLOC) == 0 |
| || (sec->flags & SEC_DEBUGGING) != 0) |
| continue; |
| |
| relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE); |
| if (relstart == NULL) |
| goto error_ret; |
| |
| /* Mark toc entries referenced as used. */ |
| repeat = 0; |
| do |
| for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| unsigned long r_symndx; |
| asection *sym_sec; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| bfd_vma val; |
| |
| r_type = ELF64_R_TYPE (rel->r_info); |
| switch (r_type) |
| { |
| case R_PPC64_TOC16: |
| case R_PPC64_TOC16_LO: |
| case R_PPC64_TOC16_HI: |
| case R_PPC64_TOC16_HA: |
| case R_PPC64_TOC16_DS: |
| case R_PPC64_TOC16_LO_DS: |
| /* In case we're taking addresses of toc entries. */ |
| case R_PPC64_ADDR64: |
| break; |
| |
| default: |
| continue; |
| } |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| r_symndx, ibfd)) |
| { |
| free (used); |
| goto error_ret; |
| } |
| |
| if (sym_sec != toc) |
| continue; |
| |
| if (h != NULL) |
| val = h->root.u.def.value; |
| else |
| val = sym->st_value; |
| val += rel->r_addend; |
| |
| if (val >= toc->size) |
| continue; |
| |
| /* For the toc section, we only mark as used if |
| this entry itself isn't unused. */ |
| if (sec == toc |
| && !used[val >> 3] |
| && (used[rel->r_offset >> 3] |
| || !skip[rel->r_offset >> 3])) |
| /* Do all the relocs again, to catch reference |
| chains. */ |
| repeat = 1; |
| |
| used[val >> 3] = 1; |
| } |
| while (repeat); |
| } |
| |
| /* Merge the used and skip arrays. Assume that TOC |
| doublewords not appearing as either used or unused belong |
| to to an entry more than one doubleword in size. */ |
| for (drop = skip, keep = used, last = 0, some_unused = 0; |
| drop < skip + (toc->size + 7) / 8; |
| ++drop, ++keep) |
| { |
| if (*keep) |
| { |
| *drop = 0; |
| last = 0; |
| } |
| else if (*drop) |
| { |
| some_unused = 1; |
| last = 1; |
| } |
| else |
| *drop = last; |
| } |
| |
| free (used); |
| |
| if (some_unused) |
| { |
| bfd_byte *contents, *src; |
| unsigned long off; |
| |
| /* Shuffle the toc contents, and at the same time convert the |
| skip array from booleans into offsets. */ |
| if (!bfd_malloc_and_get_section (ibfd, toc, &contents)) |
| goto error_ret; |
| |
| elf_section_data (toc)->this_hdr.contents = contents; |
| |
| for (src = contents, off = 0, drop = skip; |
| src < contents + toc->size; |
| src += 8, ++drop) |
| { |
| if (*drop) |
| { |
| *drop = (unsigned long) -1; |
| off += 8; |
| } |
| else if (off != 0) |
| { |
| *drop = off; |
| memcpy (src - off, src, 8); |
| } |
| } |
| toc->rawsize = toc->size; |
| toc->size = src - contents - off; |
| |
| if (toc->reloc_count != 0) |
| { |
| Elf_Internal_Rela *wrel; |
| bfd_size_type sz; |
| |
| /* Read toc relocs. */ |
| relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, |
| TRUE); |
| if (relstart == NULL) |
| goto error_ret; |
| |
| /* Remove unused toc relocs, and adjust those we keep. */ |
| wrel = relstart; |
| for (rel = relstart; rel < relstart + toc->reloc_count; ++rel) |
| if (skip[rel->r_offset >> 3] != (unsigned long) -1) |
| { |
| wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3]; |
| wrel->r_info = rel->r_info; |
| wrel->r_addend = rel->r_addend; |
| ++wrel; |
| } |
| else if (!dec_dynrel_count (rel->r_info, toc, info, |
| &local_syms, NULL, NULL)) |
| goto error_ret; |
| |
| toc->reloc_count = wrel - relstart; |
| sz = elf_section_data (toc)->rel_hdr.sh_entsize; |
| elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz; |
| BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL); |
| } |
| |
| /* Adjust addends for relocs against the toc section sym. */ |
| for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| { |
| if (sec->reloc_count == 0 |
| || elf_discarded_section (sec)) |
| continue; |
| |
| relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| TRUE); |
| if (relstart == NULL) |
| goto error_ret; |
| |
| for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| unsigned long r_symndx; |
| asection *sym_sec; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| |
| r_type = ELF64_R_TYPE (rel->r_info); |
| switch (r_type) |
| { |
| default: |
| continue; |
| |
| case R_PPC64_TOC16: |
| case R_PPC64_TOC16_LO: |
| case R_PPC64_TOC16_HI: |
| case R_PPC64_TOC16_HA: |
| case R_PPC64_TOC16_DS: |
| case R_PPC64_TOC16_LO_DS: |
| case R_PPC64_ADDR64: |
| break; |
| } |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| r_symndx, ibfd)) |
| goto error_ret; |
| |
| if (sym_sec != toc || h != NULL || sym->st_value != 0) |
| continue; |
| |
| rel->r_addend -= skip[rel->r_addend >> 3]; |
| } |
| } |
| |
| /* We shouldn't have local or global symbols defined in the TOC, |
| but handle them anyway. */ |
| if (local_syms != NULL) |
| { |
| Elf_Internal_Sym *sym; |
| |
| for (sym = local_syms; |
| sym < local_syms + symtab_hdr->sh_info; |
| ++sym) |
| if (sym->st_shndx != SHN_UNDEF |
| && (sym->st_shndx < SHN_LORESERVE |
| || sym->st_shndx > SHN_HIRESERVE) |
| && sym->st_value != 0 |
| && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc) |
| { |
| if (skip[sym->st_value >> 3] != (unsigned long) -1) |
| sym->st_value -= skip[sym->st_value >> 3]; |
| else |
| { |
| (*_bfd_error_handler) |
| (_("%s defined in removed toc entry"), |
| bfd_elf_sym_name (ibfd, symtab_hdr, sym, |
| NULL)); |
| sym->st_value = 0; |
| sym->st_shndx = SHN_ABS; |
| } |
| symtab_hdr->contents = (unsigned char *) local_syms; |
| } |
| } |
| |
| /* Finally, adjust any global syms defined in the toc. */ |
| if (toc_inf.global_toc_syms) |
| { |
| toc_inf.toc = toc; |
| toc_inf.skip = skip; |
| toc_inf.global_toc_syms = FALSE; |
| elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms, |
| &toc_inf); |
| } |
| } |
| |
| if (local_syms != NULL |
| && symtab_hdr->contents != (unsigned char *) local_syms) |
| { |
| if (!info->keep_memory) |
| free (local_syms); |
| else |
| symtab_hdr->contents = (unsigned char *) local_syms; |
| } |
| free (skip); |
| } |
| |
| return TRUE; |
| } |
| |
| /* Allocate space in .plt, .got and associated reloc sections for |
| dynamic relocs. */ |
| |
| static bfd_boolean |
| allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| { |
| struct bfd_link_info *info; |
| struct ppc_link_hash_table *htab; |
| asection *s; |
| struct ppc_link_hash_entry *eh; |
| struct ppc_dyn_relocs *p; |
| struct got_entry *gent; |
| |
| if (h->root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| info = (struct bfd_link_info *) inf; |
| htab = ppc_hash_table (info); |
| |
| if (htab->elf.dynamic_sections_created |
| && h->dynindx != -1 |
| && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) |
| { |
| struct plt_entry *pent; |
| bfd_boolean doneone = FALSE; |
| for (pent = h->plt.plist; pent != NULL; pent = pent->next) |
| if (pent->plt.refcount > 0) |
| { |
| /* If this is the first .plt entry, make room for the special |
| first entry. */ |
| s = htab->plt; |
| if (s->size == 0) |
| s->size += PLT_INITIAL_ENTRY_SIZE; |
| |
| pent->plt.offset = s->size; |
| |
| /* Make room for this entry. */ |
| s->size += PLT_ENTRY_SIZE; |
| |
| /* Make room for the .glink code. */ |
| s = htab->glink; |
| if (s->size == 0) |
| s->size += GLINK_CALL_STUB_SIZE; |
| /* We need bigger stubs past index 32767. */ |
| if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4) |
| s->size += 4; |
| s->size += 2*4; |
| |
| /* We also need to make an entry in the .rela.plt section. */ |
| s = htab->relplt; |
| s->size += sizeof (Elf64_External_Rela); |
| doneone = TRUE; |
| } |
| else |
| pent->plt.offset = (bfd_vma) -1; |
| if (!doneone) |
| { |
| h->plt.plist = NULL; |
| h->needs_plt = 0; |
| } |
| } |
| else |
| { |
| h->plt.plist = NULL; |
| h->needs_plt = 0; |
| } |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| /* Run through the TLS GD got entries first if we're changing them |
| to TPREL. */ |
| if ((eh->tls_mask & TLS_TPRELGD) != 0) |
| for (gent = h->got.glist; gent != NULL; gent = gent->next) |
| if (gent->got.refcount > 0 |
| && (gent->tls_type & TLS_GD) != 0) |
| { |
| /* This was a GD entry that has been converted to TPREL. If |
| there happens to be a TPREL entry we can use that one. */ |
| struct got_entry *ent; |
| for (ent = h->got.glist; ent != NULL; ent = ent->next) |
| if (ent->got.refcount > 0 |
| && (ent->tls_type & TLS_TPREL) != 0 |
| && ent->addend == gent->addend |
| && ent->owner == gent->owner) |
| { |
| gent->got.refcount = 0; |
| break; |
| } |
| |
| /* If not, then we'll be using our own TPREL entry. */ |
| if (gent->got.refcount != 0) |
| gent->tls_type = TLS_TLS | TLS_TPREL; |
| } |
| |
| for (gent = h->got.glist; gent != NULL; gent = gent->next) |
| if (gent->got.refcount > 0) |
| { |
| bfd_boolean dyn; |
| |
| /* Make sure this symbol is output as a dynamic symbol. |
| Undefined weak syms won't yet be marked as dynamic, |
| nor will all TLS symbols. */ |
| if (h->dynindx == -1 |
| && !h->forced_local) |
| { |
| if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| } |
| |
| if ((gent->tls_type & TLS_LD) != 0 |
| && !h->def_dynamic) |
| { |
| gent->got.offset = ppc64_tlsld_got (gent->owner)->offset; |
| continue; |
| } |
| |
| s = ppc64_elf_tdata (gent->owner)->got; |
| gent->got.offset = s->size; |
| s->size |
| += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8; |
| dyn = htab->elf.dynamic_sections_created; |
| if ((info->shared |
| || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) |
| && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak)) |
| ppc64_elf_tdata (gent->owner)->relgot->size |
| += (gent->tls_type & eh->tls_mask & TLS_GD |
| ? 2 * sizeof (Elf64_External_Rela) |
| : sizeof (Elf64_External_Rela)); |
| } |
| else |
| gent->got.offset = (bfd_vma) -1; |
| |
| if (eh->dyn_relocs == NULL) |
| return TRUE; |
| |
| /* In the shared -Bsymbolic case, discard space allocated for |
| dynamic pc-relative relocs against symbols which turn out to be |
| defined in regular objects. For the normal shared case, discard |
| space for relocs that have become local due to symbol visibility |
| changes. */ |
| |
| if (info->shared) |
| { |
| /* Relocs that use pc_count are those that appear on a call insn, |
| or certain REL relocs (see MUST_BE_DYN_RELOC) that can be |
| generated via assembly. We want calls to protected symbols to |
| resolve directly to the function rather than going via the plt. |
| If people want function pointer comparisons to work as expected |
| then they should avoid writing weird assembly. */ |
| if (SYMBOL_CALLS_LOCAL (info, h)) |
| { |
| struct ppc_dyn_relocs **pp; |
| |
| for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| { |
| p->count -= p->pc_count; |
| p->pc_count = 0; |
| if (p->count == 0) |
| *pp = p->next; |
| else |
| pp = &p->next; |
| } |
| } |
| |
| /* Also discard relocs on undefined weak syms with non-default |
| visibility. */ |
| if (eh->dyn_relocs != NULL |
| && h->root.type == bfd_link_hash_undefweak) |
| { |
| if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| eh->dyn_relocs = NULL; |
| |
| /* Make sure this symbol is output as a dynamic symbol. |
| Undefined weak syms won't yet be marked as dynamic. */ |
| else if (h->dynindx == -1 |
| && !h->forced_local) |
| { |
| if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| } |
| } |
| } |
| else if (ELIMINATE_COPY_RELOCS) |
| { |
| /* For the non-shared case, discard space for relocs against |
| symbols which turn out to need copy relocs or are not |
| dynamic. */ |
| |
| if (!h->non_got_ref |
| && h->def_dynamic |
| && !h->def_regular) |
| { |
| /* Make sure this symbol is output as a dynamic symbol. |
| Undefined weak syms won't yet be marked as dynamic. */ |
| if (h->dynindx == -1 |
| && !h->forced_local) |
| { |
| if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| } |
| |
| /* If that succeeded, we know we'll be keeping all the |
| relocs. */ |
| if (h->dynindx != -1) |
| goto keep; |
| } |
| |
| eh->dyn_relocs = NULL; |
| |
| keep: ; |
| } |
| |
| /* Finally, allocate space. */ |
| for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| { |
| asection *sreloc = elf_section_data (p->sec)->sreloc; |
| sreloc->size += p->count * sizeof (Elf64_External_Rela); |
| } |
| |
| return TRUE; |
| } |
| |
| /* Find any dynamic relocs that apply to read-only sections. */ |
| |
| static bfd_boolean |
| readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| { |
| struct ppc_link_hash_entry *eh; |
| struct ppc_dyn_relocs *p; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| { |
| asection *s = p->sec->output_section; |
| |
| if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| { |
| struct bfd_link_info *info = inf; |
| |
| info->flags |= DF_TEXTREL; |
| |
| /* Not an error, just cut short the traversal. */ |
| return FALSE; |
| } |
| } |
| return TRUE; |
| } |
| |
| /* Set the sizes of the dynamic sections. */ |
| |
| static bfd_boolean |
| ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info) |
| { |
| struct ppc_link_hash_table *htab; |
| bfd *dynobj; |
| asection *s; |
| bfd_boolean relocs; |
| bfd *ibfd; |
| |
| htab = ppc_hash_table (info); |
| dynobj = htab->elf.dynobj; |
| if (dynobj == NULL) |
| abort (); |
| |
| if (htab->elf.dynamic_sections_created) |
| { |
| /* Set the contents of the .interp section to the interpreter. */ |
| if (info->executable) |
| { |
| s = bfd_get_section_by_name (dynobj, ".interp"); |
| if (s == NULL) |
| abort (); |
| s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| } |
| } |
| |
| /* Set up .got offsets for local syms, and space for local dynamic |
| relocs. */ |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| { |
| struct got_entry **lgot_ents; |
| struct got_entry **end_lgot_ents; |
| char *lgot_masks; |
| bfd_size_type locsymcount; |
| Elf_Internal_Shdr *symtab_hdr; |
| asection *srel; |
| |
| if (!is_ppc64_elf_target (ibfd->xvec)) |
| continue; |
| |
| if (ppc64_tlsld_got (ibfd)->refcount > 0) |
| { |
| s = ppc64_elf_tdata (ibfd)->got; |
| ppc64_tlsld_got (ibfd)->offset = s->size; |
| s->size += 16; |
| if (info->shared) |
| { |
| srel = ppc64_elf_tdata (ibfd)->relgot; |
| srel->size += sizeof (Elf64_External_Rela); |
| } |
| } |
| else |
| ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1; |
| |
| for (s = ibfd->sections; s != NULL; s = s->next) |
| { |
| struct ppc_dyn_relocs *p; |
| |
| for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
| { |
| if (!bfd_is_abs_section (p->sec) |
| && bfd_is_abs_section (p->sec->output_section)) |
| { |
| /* Input section has been discarded, either because |
| it is a copy of a linkonce section or due to |
| linker script /DISCARD/, so we'll be discarding |
| the relocs too. */ |
| } |
| else if (p->count != 0) |
| { |
| srel = elf_section_data (p->sec)->sreloc; |
| srel->size += p->count * sizeof (Elf64_External_Rela); |
| if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| info->flags |= DF_TEXTREL; |
| } |
| } |
| } |
| |
| lgot_ents = elf_local_got_ents (ibfd); |
| if (!lgot_ents) |
| continue; |
| |
| symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| locsymcount = symtab_hdr->sh_info; |
| end_lgot_ents = lgot_ents + locsymcount; |
| lgot_masks = (char *) end_lgot_ents; |
| s = ppc64_elf_tdata (ibfd)->got; |
| srel = ppc64_elf_tdata (ibfd)->relgot; |
| for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) |
| { |
| struct got_entry *ent; |
| |
| for (ent = *lgot_ents; ent != NULL; ent = ent->next) |
| if (ent->got.refcount > 0) |
| { |
| if ((ent->tls_type & *lgot_masks & TLS_LD) != 0) |
| { |
| if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1) |
| { |
| ppc64_tlsld_got (ibfd)->offset = s->size; |
| s->size += 16; |
| if (info->shared) |
| srel->size += sizeof (Elf64_External_Rela); |
| } |
| ent->got.offset = ppc64_tlsld_got (ibfd)->offset; |
| } |
| else |
| { |
| ent->got.offset = s->size; |
| if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) |
| { |
| s->size += 16; |
| if (info->shared) |
| srel->size += 2 * sizeof (Elf64_External_Rela); |
| } |
| else |
| { |
| s->size += 8; |
| if (info->shared) |
| srel->size += sizeof (Elf64_External_Rela); |
| } |
| } |
| } |
| else |
| ent->got.offset = (bfd_vma) -1; |
| } |
| } |
| |
| /* Allocate global sym .plt and .got entries, and space for global |
| sym dynamic relocs. */ |
| elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); |
| |
| /* We now have determined the sizes of the various dynamic sections. |
| Allocate memory for them. */ |
| relocs = FALSE; |
| for (s = dynobj->sections; s != NULL; s = s->next) |
| { |
| if ((s->flags & SEC_LINKER_CREATED) == 0) |
| continue; |
| |
| if (s == htab->brlt || s == htab->relbrlt) |
| /* These haven't been allocated yet; don't strip. */ |
| continue; |
| else if (s == htab->got |
| || s == htab->plt |
| || s == htab->glink |
| || s == htab->dynbss) |
| { |
| /* Strip this section if we don't need it; see the |
| comment below. */ |
| } |
| else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
| { |
| if (s->size != 0) |
| { |
| if (s != htab->relplt) |
| relocs = TRUE; |
| |
| /* We use the reloc_count field as a counter if we need |
| to copy relocs into the output file. */ |
| s->reloc_count = 0; |
| } |
| } |
| else |
| { |
| /* It's not one of our sections, so don't allocate space. */ |
| continue; |
| } |
| |
| if (s->size == 0) |
| { |
| /* If we don't need this section, strip it from the |
| output file. This is mostly to handle .rela.bss and |
| .rela.plt. We must create both sections in |
| create_dynamic_sections, because they must be created |
| before the linker maps input sections to output |
| sections. The linker does that before |
| adjust_dynamic_symbol is called, and it is that |
| function which decides whether anything needs to go |
| into these sections. */ |
| s->flags |= SEC_EXCLUDE; |
| continue; |
| } |
| |
| if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| continue; |
| |
| /* Allocate memory for the section contents. We use bfd_zalloc |
| here in case unused entries are not reclaimed before the |
| section's contents are written out. This should not happen, |
| but this way if it does we get a R_PPC64_NONE reloc in .rela |
| sections instead of garbage. |
| We also rely on the section contents being zero when writing |
| the GOT. */ |
| s->contents = bfd_zalloc (dynobj, s->size); |
| if (s->contents == NULL) |
| return FALSE; |
| } |
| |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| { |
| if (!is_ppc64_elf_target (ibfd->xvec)) |
| continue; |
| |
| s = ppc64_elf_tdata (ibfd)->got; |
| if (s != NULL && s != htab->got) |
| { |
| if (s->size == 0) |
| s->flags |= SEC_EXCLUDE; |
| else |
| { |
| s->contents = bfd_zalloc (ibfd, s->size); |
| if (s->contents == NULL) |
| return FALSE; |
| } |
| } |
| s = ppc64_elf_tdata (ibfd)->relgot; |
| if (s != NULL) |
| { |
| if (s->size == 0) |
| s->flags |= SEC_EXCLUDE; |
| else |
| { |
| s->contents = bfd_zalloc (ibfd, s->size); |
| if (s->contents == NULL) |
| return FALSE; |
| relocs = TRUE; |
| s->reloc_count = 0; |
| } |
| } |
| } |
| |
| if (htab->elf.dynamic_sections_created) |
| { |
| /* Add some entries to the .dynamic section. We fill in the |
| values later, in ppc64_elf_finish_dynamic_sections, but we |
| must add the entries now so that we get the correct size for |
| the .dynamic section. The DT_DEBUG entry is filled in by the |
| dynamic linker and used by the debugger. */ |
| #define add_dynamic_entry(TAG, VAL) \ |
| _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| |
| if (info->executable) |
| { |
| if (!add_dynamic_entry (DT_DEBUG, 0)) |
| return FALSE; |
| } |
| |
| if (htab->plt != NULL && htab->plt->size != 0) |
| { |
| if (!add_dynamic_entry (DT_PLTGOT, 0) |
| || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| || !add_dynamic_entry (DT_JMPREL, 0) |
| || !add_dynamic_entry (DT_PPC64_GLINK, 0)) |
| return FALSE; |
| } |
| |
| if (NO_OPD_RELOCS) |
| { |
| if (!add_dynamic_entry (DT_PPC64_OPD, 0) |
| || !add_dynamic_entry (DT_PPC64_OPDSZ, 0)) |
| return FALSE; |
| } |
| |
| if (relocs) |
| { |
| if (!add_dynamic_entry (DT_RELA, 0) |
| || !add_dynamic_entry (DT_RELASZ, 0) |
| || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) |
| return FALSE; |
| |
| /* If any dynamic relocs apply to a read-only section, |
| then we need a DT_TEXTREL entry. */ |
| if ((info->flags & DF_TEXTREL) == 0) |
| elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info); |
| |
| if ((info->flags & DF_TEXTREL) != 0) |
| { |
| if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| return FALSE; |
| } |
| } |
| } |
| #undef add_dynamic_entry |
| |
| return TRUE; |
| } |
| |
| /* Determine the type of stub needed, if any, for a call. */ |
| |
| static inline enum ppc_stub_type |
| ppc_type_of_stub (asection *input_sec, |
| const Elf_Internal_Rela *rel, |
| struct ppc_link_hash_entry **hash, |
| bfd_vma destination) |
| { |
| struct ppc_link_hash_entry *h = *hash; |
| bfd_vma location; |
| bfd_vma branch_offset; |
| bfd_vma max_branch_offset; |
| enum elf_ppc64_reloc_type r_type; |
| |
| if (h != NULL) |
| { |
| struct ppc_link_hash_entry *fdh = h; |
| if (fdh->oh != NULL |
| && fdh->oh->is_func_descriptor) |
| fdh = fdh->oh; |
| |
| if (fdh->elf.dynindx != -1) |
| { |
| struct plt_entry *ent; |
| |
| for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend |
| && ent->plt.offset != (bfd_vma) -1) |
| { |
| *hash = fdh; |
| return ppc_stub_plt_call; |
| } |
| } |
| |
| /* Here, we know we don't have a plt entry. If we don't have a |
| either a defined function descriptor or a defined entry symbol |
| in a regular object file, then it is pointless trying to make |
| any other type of stub. */ |
| if (!((fdh->elf.root.type == bfd_link_hash_defined |
| || fdh->elf.root.type == bfd_link_hash_defweak) |
| && fdh->elf.root.u.def.section->output_section != NULL) |
| && !((h->elf.root.type == bfd_link_hash_defined |
| || h->elf.root.type == bfd_link_hash_defweak) |
| && h->elf.root.u.def.section->output_section != NULL)) |
| return ppc_stub_none; |
| } |
| |
| /* Determine where the call point is. */ |
| location = (input_sec->output_offset |
| + input_sec->output_section->vma |
| + rel->r_offset); |
| |
| branch_offset = destination - location; |
| r_type = ELF64_R_TYPE (rel->r_info); |
| |
| /* Determine if a long branch stub is needed. */ |
| max_branch_offset = 1 << 25; |
| if (r_type != R_PPC64_REL24) |
| max_branch_offset = 1 << 15; |
| |
| if (branch_offset + max_branch_offset >= 2 * max_branch_offset) |
| /* We need a stub. Figure out whether a long_branch or plt_branch |
| is needed later. */ |
| return ppc_stub_long_branch; |
| |
| return ppc_stub_none; |
| } |
| |
| /* Build a .plt call stub. */ |
| |
| static inline bfd_byte * |
| build_plt_stub (bfd *obfd, bfd_byte *p, int offset) |
| { |
| #define PPC_LO(v) ((v) & 0xffff) |
| #define PPC_HI(v) (((v) >> 16) & 0xffff) |
| #define PPC_HA(v) PPC_HI ((v) + 0x8000) |
| |
| if (PPC_HA (offset) != 0) |
| { |
| bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; |
| bfd_put_32 (obfd, STD_R2_40R1, p), p += 4; |
| bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; |
| if (PPC_HA (offset + 16) != PPC_HA (offset)) |
| { |
| bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4; |
| offset = 0; |
| } |
| bfd_put_32 (obfd, MTCTR_R11, p), p += 4; |
| bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4; |
| bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4; |
| bfd_put_32 (obfd, BCTR, p), p += 4; |
| } |
| else |
| { |
| bfd_put_32 (obfd, STD_R2_40R1, p), p += 4; |
| bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4; |
| if (PPC_HA (offset + 16) != PPC_HA (offset)) |
| { |
| bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4; |
| offset = 0; |
| } |
| bfd_put_32 (obfd, MTCTR_R11, p), p += 4; |
| bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4; |
| bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4; |
| bfd_put_32 (obfd, BCTR, p), p += 4; |
| } |
| return p; |
| } |
| |
| static bfd_boolean |
| ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
| { |
| struct ppc_stub_hash_entry *stub_entry; |
| struct ppc_branch_hash_entry *br_entry; |
| struct bfd_link_info *info; |
| struct ppc_link_hash_table *htab; |
| bfd_byte *loc; |
| bfd_byte *p; |
| unsigned int indx; |
| struct plt_entry *ent; |
| bfd_vma dest, off; |
| int size; |
| |
| /* Massage our args to the form they really have. */ |
| stub_entry = (struct ppc_stub_hash_entry *) gen_entry; |
| info = in_arg; |
| |
| htab = ppc_hash_table (info); |
| |
| /* Make a note of the offset within the stubs for this entry. */ |
| stub_entry->stub_offset = stub_entry->stub_sec->size; |
| loc = stub_entry->stub_sec->contents + stub_entry->stub_offset; |
| |
| htab->stub_count[stub_entry->stub_type - 1] += 1; |
| switch (stub_entry->stub_type) |
| { |
| case ppc_stub_long_branch: |
| case ppc_stub_long_branch_r2off: |
| /* Branches are relative. This is where we are going to. */ |
| off = dest = (stub_entry->target_value |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_section->output_section->vma); |
| |
| /* And this is where we are coming from. */ |
| off -= (stub_entry->stub_offset |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_sec->output_section->vma); |
| |
| size = 4; |
| if (stub_entry->stub_type == ppc_stub_long_branch_r2off) |
| { |
| bfd_vma r2off; |
| |
| r2off = (htab->stub_group[stub_entry->target_section->id].toc_off |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc); |
| loc += 4; |
| size = 12; |
| if (PPC_HA (r2off) != 0) |
| { |
| size = 16; |
| bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); |
| loc += 4; |
| } |
| bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); |
| loc += 4; |
| off -= size - 4; |
| } |
| bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc); |
| |
| if (off + (1 << 25) >= (bfd_vma) (1 << 26)) |
| { |
| (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"), |
| stub_entry->root.string); |
| htab->stub_error = TRUE; |
| return FALSE; |
| } |
| |
| if (info->emitrelocations) |
| { |
| Elf_Internal_Rela *relocs, *r; |
| struct bfd_elf_section_data *elfsec_data; |
| |
| elfsec_data = elf_section_data (stub_entry->stub_sec); |
| relocs = elfsec_data->relocs; |
| if (relocs == NULL) |
| { |
| bfd_size_type relsize; |
| relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs); |
| relocs = bfd_alloc (htab->stub_bfd, relsize); |
| if (relocs == NULL) |
| return FALSE; |
| elfsec_data->relocs = relocs; |
| elfsec_data->rel_hdr.sh_size = (stub_entry->stub_sec->reloc_count |
| * sizeof (Elf64_External_Rela)); |
| elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela); |
| stub_entry->stub_sec->reloc_count = 0; |
| } |
| r = relocs + stub_entry->stub_sec->reloc_count; |
| stub_entry->stub_sec->reloc_count += 1; |
| r->r_offset = loc - stub_entry->stub_sec->contents; |
| r->r_info = ELF64_R_INFO (0, R_PPC64_REL24); |
| r->r_addend = dest; |
| if (stub_entry->h != NULL) |
| { |
| struct elf_link_hash_entry **hashes; |
| unsigned long symndx; |
| struct ppc_link_hash_entry *h; |
| |
| hashes = elf_sym_hashes (htab->stub_bfd); |
| if (hashes == NULL) |
| { |
| bfd_size_type hsize; |
| |
| hsize = (htab->stub_globals + 1) * sizeof (*hashes); |
| hashes = bfd_zalloc (htab->stub_bfd, hsize); |
| if (hashes == NULL) |
| return FALSE; |
| elf_sym_hashes (htab->stub_bfd) = hashes; |
| htab->stub_globals = 1; |
| } |
| symndx = htab->stub_globals++; |
| h = stub_entry->h; |
| hashes[symndx] = &h->elf; |
| r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24); |
| if (h->oh != NULL && h->oh->is_func) |
| h = h->oh; |
| if (h->elf.root.u.def.section != stub_entry->target_section) |
| /* H is an opd symbol. The addend must be zero. */ |
| r->r_addend = 0; |
| else |
| { |
| off = (h->elf.root.u.def.value |
| + h->elf.root.u.def.section->output_offset |
| + h->elf.root.u.def.section->output_section->vma); |
| r->r_addend -= off; |
| } |
| } |
| } |
| break; |
| |
| case ppc_stub_plt_branch: |
| case ppc_stub_plt_branch_r2off: |
| br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
| stub_entry->root.string + 9, |
| FALSE, FALSE); |
| if (br_entry == NULL) |
| { |
| (*_bfd_error_handler) (_("can't find branch stub `%s'"), |
| stub_entry->root.string); |
| htab->stub_error = TRUE; |
| return FALSE; |
| } |
| |
| off = (stub_entry->target_value |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_section->output_section->vma); |
| |
| bfd_put_64 (htab->brlt->owner, off, |
| htab->brlt->contents + br_entry->offset); |
| |
| if (br_entry->iter == htab->stub_iteration) |
| { |
| br_entry->iter = 0; |
| |
| if (htab->relbrlt != NULL) |
| { |
| /* Create a reloc for the branch lookup table entry. */ |
| Elf_Internal_Rela rela; |
| bfd_byte *rl; |
| |
| rela.r_offset = (br_entry->offset |
| + htab->brlt->output_offset |
| + htab->brlt->output_section->vma); |
| rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| rela.r_addend = off; |
| |
| rl = htab->relbrlt->contents; |
| rl += (htab->relbrlt->reloc_count++ |
| * sizeof (Elf64_External_Rela)); |
| bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl); |
| } |
| else if (info->emitrelocations) |
| { |
| Elf_Internal_Rela *relocs, *r; |
| struct bfd_elf_section_data *elfsec_data; |
| |
| elfsec_data = elf_section_data (htab->brlt); |
| relocs = elfsec_data->relocs; |
| if (relocs == NULL) |
| { |
| bfd_size_type relsize; |
| relsize = htab->brlt->reloc_count * sizeof (*relocs); |
| relocs = bfd_alloc (htab->brlt->owner, relsize); |
| if (relocs == NULL) |
| return FALSE; |
| elfsec_data->relocs = relocs; |
| elfsec_data->rel_hdr.sh_size |
| = (stub_entry->stub_sec->reloc_count |
| * sizeof (Elf64_External_Rela)); |
| elfsec_data->rel_hdr.sh_entsize |
| = sizeof (Elf64_External_Rela); |
| htab->brlt->reloc_count = 0; |
| } |
| r = relocs + htab->brlt->reloc_count; |
| htab->brlt->reloc_count += 1; |
| r->r_offset = (br_entry->offset |
| + htab->brlt->output_offset |
| + htab->brlt->output_section->vma); |
| r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| r->r_addend = off; |
| } |
| } |
| |
| off = (br_entry->offset |
| + htab->brlt->output_offset |
| + htab->brlt->output_section->vma |
| - elf_gp (htab->brlt->output_section->owner) |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| |
| if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
| { |
| (*_bfd_error_handler) |
| (_("linkage table error against `%s'"), |
| stub_entry->root.string); |
| bfd_set_error (bfd_error_bad_value); |
| htab->stub_error = TRUE; |
| return FALSE; |
| } |
| |
| indx = off; |
| if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) |
| { |
| if (PPC_HA (indx) != 0) |
| { |
| size = 16; |
| bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc); |
| loc += 4; |
| bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc); |
| } |
| else |
| { |
| size = 12; |
| bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc); |
| } |
| } |
| else |
| { |
| bfd_vma r2off; |
| |
| r2off = (htab->stub_group[stub_entry->target_section->id].toc_off |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc); |
| loc += 4; |
| size = 20; |
| if (PPC_HA (indx) != 0) |
| { |
| size += 4; |
| bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc); |
| loc += 4; |
| bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc); |
| loc += 4; |
| } |
| else |
| { |
| bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc); |
| loc += 4; |
| } |
| |
| if (PPC_HA (r2off) != 0) |
| { |
| size += 4; |
| bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); |
| loc += 4; |
| } |
| bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); |
| } |
| loc += 4; |
| bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc); |
| loc += 4; |
| bfd_put_32 (htab->stub_bfd, BCTR, loc); |
| break; |
| |
| case ppc_stub_plt_call: |
| /* Do the best we can for shared libraries built without |
| exporting ".foo" for each "foo". This can happen when symbol |
| versioning scripts strip all bar a subset of symbols. */ |
| if (stub_entry->h->oh != NULL |
| && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined |
| && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak) |
| { |
| /* Point the symbol at the stub. There may be multiple stubs, |
| we don't really care; The main thing is to make this sym |
| defined somewhere. Maybe defining the symbol in the stub |
| section is a silly idea. If we didn't do this, htab->top_id |
| could disappear. */ |
| stub_entry->h->oh->elf.root.type = bfd_link_hash_defined; |
| stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec; |
| stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset; |
| } |
| |
| /* Now build the stub. */ |
| off = (bfd_vma) -1; |
| for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == stub_entry->addend) |
| { |
| off = ent->plt.offset; |
| break; |
| } |
| if (off >= (bfd_vma) -2) |
| abort (); |
| |
| off &= ~ (bfd_vma) 1; |
| off += (htab->plt->output_offset |
| + htab->plt->output_section->vma |
| - elf_gp (htab->plt->output_section->owner) |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| |
| if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
| { |
| (*_bfd_error_handler) |
| (_("linkage table error against `%s'"), |
| stub_entry->h->elf.root.root.string); |
| bfd_set_error (bfd_error_bad_value); |
| htab->stub_error = TRUE; |
| return FALSE; |
| } |
| |
| p = build_plt_stub (htab->stub_bfd, loc, off); |
| size = p - loc; |
| break; |
| |
| default: |
| BFD_FAIL (); |
| return FALSE; |
| } |
| |
| stub_entry->stub_sec->size += size; |
| |
| if (htab->emit_stub_syms) |
| { |
| struct elf_link_hash_entry *h; |
| size_t len1, len2; |
| char *name; |
| const char *const stub_str[] = { "long_branch", |
| "long_branch_r2off", |
| "plt_branch", |
| "plt_branch_r2off", |
| "plt_call" }; |
| |
| len1 = strlen (stub_str[stub_entry->stub_type - 1]); |
| len2 = strlen (stub_entry->root.string); |
| name = bfd_malloc (len1 + len2 + 2); |
| if (name == NULL) |
| return FALSE; |
| memcpy (name, stub_entry->root.string, 9); |
| memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1); |
| memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1); |
| h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); |
| if (h == NULL) |
| return FALSE; |
| if (h->root.type == bfd_link_hash_new) |
| { |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = stub_entry->stub_sec; |
| h->root.u.def.value = stub_entry->stub_offset; |
| h->ref_regular = 1; |
| h->def_regular = 1; |
| h->ref_regular_nonweak = 1; |
| h->forced_local = 1; |
| h->non_elf = 0; |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* As above, but don't actually build the stub. Just bump offset so |
| we know stub section sizes, and select plt_branch stubs where |
| long_branch stubs won't do. */ |
| |
| static bfd_boolean |
| ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
| { |
| struct ppc_stub_hash_entry *stub_entry; |
| struct bfd_link_info *info; |
| struct ppc_link_hash_table *htab; |
| bfd_vma off; |
| int size; |
| |
| /* Massage our args to the form they really have. */ |
| stub_entry = (struct ppc_stub_hash_entry *) gen_entry; |
| info = in_arg; |
| |
| htab = ppc_hash_table (info); |
| |
| if (stub_entry->stub_type == ppc_stub_plt_call) |
| { |
| struct plt_entry *ent; |
| off = (bfd_vma) -1; |
| for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == stub_entry->addend) |
| { |
| off = ent->plt.offset & ~(bfd_vma) 1; |
| break; |
| } |
| if (off >= (bfd_vma) -2) |
| abort (); |
| off += (htab->plt->output_offset |
| + htab->plt->output_section->vma |
| - elf_gp (htab->plt->output_section->owner) |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| |
| size = PLT_CALL_STUB_SIZE; |
| if (PPC_HA (off) == 0) |
| size -= 4; |
| if (PPC_HA (off + 16) != PPC_HA (off)) |
| size += 4; |
| } |
| else |
| { |
| /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off |
| variants. */ |
| bfd_vma r2off = 0; |
| |
| off = (stub_entry->target_value |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_section->output_section->vma); |
| off -= (stub_entry->stub_sec->size |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_sec->output_section->vma); |
| |
| /* Reset the stub type from the plt variant in case we now |
| can reach with a shorter stub. */ |
| if (stub_entry->stub_type >= ppc_stub_plt_branch) |
| stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch; |
| |
| size = 4; |
| if (stub_entry->stub_type == ppc_stub_long_branch_r2off) |
| { |
| r2off = (htab->stub_group[stub_entry->target_section->id].toc_off |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| size = 12; |
| if (PPC_HA (r2off) != 0) |
| size = 16; |
| off -= size - 4; |
| } |
| |
| /* If the branch offset if too big, use a ppc_stub_plt_branch. */ |
| if (off + (1 << 25) >= (bfd_vma) (1 << 26)) |
| { |
| struct ppc_branch_hash_entry *br_entry; |
| unsigned int indx; |
| |
| br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
| stub_entry->root.string + 9, |
| TRUE, FALSE); |
| if (br_entry == NULL) |
| { |
| (*_bfd_error_handler) (_("can't build branch stub `%s'"), |
| stub_entry->root.string); |
| htab->stub_error = TRUE; |
| return FALSE; |
| } |
| |
| if (br_entry->iter != htab->stub_iteration) |
| { |
| br_entry->iter = htab->stub_iteration; |
| br_entry->offset = htab->brlt->size; |
| htab->brlt->size += 8; |
| |
| if (htab->relbrlt != NULL) |
| htab->relbrlt->size += sizeof (Elf64_External_Rela); |
| else if (info->emitrelocations) |
| { |
| htab->brlt->reloc_count += 1; |
| htab->brlt->flags |= SEC_RELOC; |
| } |
| } |
| |
| stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch; |
| off = (br_entry->offset |
| + htab->brlt->output_offset |
| + htab->brlt->output_section->vma |
| - elf_gp (htab->brlt->output_section->owner) |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| |
| indx = off; |
| if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) |
| { |
| size = 12; |
| if (PPC_HA (indx) != 0) |
| size = 16; |
| } |
| else |
| { |
| size = 20; |
| if (PPC_HA (indx) != 0) |
| size += 4; |
| |
| if (PPC_HA (r2off) != 0) |
| size += 4; |
| } |
| } |
| else if (info->emitrelocations) |
| { |
| stub_entry->stub_sec->reloc_count += 1; |
| stub_entry->stub_sec->flags |= SEC_RELOC; |
| } |
| } |
| |
| stub_entry->stub_sec->size += size; |
| return TRUE; |
| } |
| |
| /* Set up various things so that we can make a list of input sections |
| for each output section included in the link. Returns -1 on error, |
| 0 when no stubs will be needed, and 1 on success. */ |
| |
| int |
| ppc64_elf_setup_section_lists (bfd *output_bfd, |
| struct bfd_link_info *info, |
| int no_multi_toc) |
| { |
| bfd *input_bfd; |
| int top_id, top_index, id; |
| asection *section; |
| asection **input_list; |
| bfd_size_type amt; |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| htab->no_multi_toc = no_multi_toc; |
| |
| if (htab->brlt == NULL) |
| return 0; |
| |
| /* Find the top input section id. */ |
| for (input_bfd = info->input_bfds, top_id = 3; |
| input_bfd != NULL; |
| input_bfd = input_bfd->link_next) |
| { |
| for (section = input_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| if (top_id < section->id) |
| top_id = section->id; |
| } |
| } |
| |
| htab->top_id = top_id; |
| amt = sizeof (struct map_stub) * (top_id + 1); |
| htab->stub_group = bfd_zmalloc (amt); |
| if (htab->stub_group == NULL) |
| return -1; |
| |
| /* Set toc_off for com, und, abs and ind sections. */ |
| for (id = 0; id < 3; id++) |
| htab->stub_group[id].toc_off = TOC_BASE_OFF; |
| |
| elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd); |
| |
| /* We can't use output_bfd->section_count here to find the top output |
| section index as some sections may have been removed, and |
| strip_excluded_output_sections doesn't renumber the indices. */ |
| for (section = output_bfd->sections, top_index = 0; |
| section != NULL; |
| section = section->next) |
| { |
| if (top_index < section->index) |
| top_index = section->index; |
| } |
| |
| htab->top_index = top_index; |
| amt = sizeof (asection *) * (top_index + 1); |
| input_list = bfd_zmalloc (amt); |
| htab->input_list = input_list; |
| if (input_list == NULL) |
| return -1; |
| |
| return 1; |
| } |
| |
| /* The linker repeatedly calls this function for each TOC input section |
| and linker generated GOT section. Group input bfds such that the toc |
| within a group is less than 64k in size. Will break with cute linker |
| scripts that play games with dot in the output toc section. */ |
| |
| void |
| ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec) |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| if (!htab->no_multi_toc) |
| { |
| bfd_vma addr = isec->output_offset + isec->output_section->vma; |
| bfd_vma off = addr - htab->toc_curr; |
| |
| if (off + isec->size > 0x10000) |
| htab->toc_curr = addr; |
| |
| elf_gp (isec->owner) = (htab->toc_curr |
| - elf_gp (isec->output_section->owner) |
| + TOC_BASE_OFF); |
| } |
| } |
| |
| /* Called after the last call to the above function. */ |
| |
| void |
| ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info) |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd); |
| |
| /* toc_curr tracks the TOC offset used for code sections below in |
| ppc64_elf_next_input_section. Start off at 0x8000. */ |
| htab->toc_curr = TOC_BASE_OFF; |
| } |
| |
| /* No toc references were found in ISEC. If the code in ISEC makes no |
| calls, then there's no need to use toc adjusting stubs when branching |
| into ISEC. Actually, indirect calls from ISEC are OK as they will |
| load r2. Returns -1 on error, 0 for no stub needed, 1 for stub |
| needed, and 2 if a cyclical call-graph was found but no other reason |
| for a stub was detected. If called from the top level, a return of |
| 2 means the same as a return of 0. */ |
| |
| static int |
| toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec) |
| { |
| Elf_Internal_Rela *relstart, *rel; |
| Elf_Internal_Sym *local_syms; |
| int ret; |
| struct ppc_link_hash_table *htab; |
| |
| /* We know none of our code bearing sections will need toc stubs. */ |
| if ((isec->flags & SEC_LINKER_CREATED) != 0) |
| return 0; |
| |
| if (isec->size == 0) |
| return 0; |
| |
| if (isec->output_section == NULL) |
| return 0; |
| |
| if (isec->reloc_count == 0) |
| return 0; |
| |
| relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL, |
| info->keep_memory); |
| if (relstart == NULL) |
| return -1; |
| |
| /* Look for branches to outside of this section. */ |
| local_syms = NULL; |
| ret = 0; |
| htab = ppc_hash_table (info); |
| for (rel = relstart; rel < relstart + isec->reloc_count; ++rel) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| unsigned long r_symndx; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| asection *sym_sec; |
| long *opd_adjust; |
| bfd_vma sym_value; |
| bfd_vma dest; |
| |
| r_type = ELF64_R_TYPE (rel->r_info); |
| if (r_type != R_PPC64_REL24 |
| && r_type != R_PPC64_REL14 |
| && r_type != R_PPC64_REL14_BRTAKEN |
| && r_type != R_PPC64_REL14_BRNTAKEN) |
| continue; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx, |
| isec->owner)) |
| { |
| ret = -1; |
| break; |
| } |
| |
| /* Calls to dynamic lib functions go through a plt call stub |
| that uses r2. Branches to undefined symbols might be a call |
| using old-style dot symbols that can be satisfied by a plt |
| call into a new-style dynamic library. */ |
| if (sym_sec == NULL) |
| { |
| struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h; |
| if (eh != NULL |
| && eh->oh != NULL |
| && eh->oh->elf.plt.plist != NULL) |
| { |
| ret = 1; |
| break; |
| } |
| |
| /* Ignore other undefined symbols. */ |
| continue; |
| } |
| |
| /* Assume branches to other sections not included in the link need |
| stubs too, to cover -R and absolute syms. */ |
| if (sym_sec->output_section == NULL) |
| { |
| ret = 1; |
| break; |
| } |
| |
| if (h == NULL) |
| sym_value = sym->st_value; |
| else |
| { |
| if (h->root.type != bfd_link_hash_defined |
| && h->root.type != bfd_link_hash_defweak) |
| abort (); |
| sym_value = h->root.u.def.value; |
| } |
| sym_value += rel->r_addend; |
| |
| /* If this branch reloc uses an opd sym, find the code section. */ |
| opd_adjust = get_opd_info (sym_sec); |
| if (opd_adjust != NULL) |
| { |
| if (h == NULL) |
| { |
| long adjust; |
| |
| adjust = opd_adjust[sym->st_value / 8]; |
| if (adjust == -1) |
| /* Assume deleted functions won't ever be called. */ |
| continue; |
| sym_value += adjust; |
| } |
| |
| dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL); |
| if (dest == (bfd_vma) -1) |
| continue; |
| } |
| else |
| dest = (sym_value |
| + sym_sec->output_offset |
| + sym_sec->output_section->vma); |
| |
| /* Ignore branch to self. */ |
| if (sym_sec == isec) |
| continue; |
| |
| /* If the called function uses the toc, we need a stub. */ |
| if (sym_sec->has_toc_reloc |
| || sym_sec->makes_toc_func_call) |
| { |
| ret = 1; |
| break; |
| } |
| |
| /* Assume any branch that needs a long branch stub might in fact |
| need a plt_branch stub. A plt_branch stub uses r2. */ |
| else if (dest - (isec->output_offset |
| + isec->output_section->vma |
| + rel->r_offset) + (1 << 25) >= (2 << 25)) |
| { |
| ret = 1; |
| break; |
| } |
| |
| /* If calling back to a section in the process of being tested, we |
| can't say for sure that no toc adjusting stubs are needed, so |
| don't return zero. */ |
| else if (sym_sec->call_check_in_progress) |
| ret = 2; |
| |
| /* Branches to another section that itself doesn't have any TOC |
| references are OK. Recursively call ourselves to check. */ |
| else if (sym_sec->id <= htab->top_id |
| && htab->stub_group[sym_sec->id].toc_off == 0) |
| { |
| int recur; |
| |
| /* Mark current section as indeterminate, so that other |
| sections that call back to current won't be marked as |
| known. */ |
| isec->call_check_in_progress = 1; |
| recur = toc_adjusting_stub_needed (info, sym_sec); |
| isec->call_check_in_progress = 0; |
| |
| if (recur < 0) |
| { |
| /* An error. Exit. */ |
| ret = -1; |
| break; |
| } |
| else if (recur <= 1) |
| { |
| /* Known result. Mark as checked and set section flag. */ |
| htab->stub_group[sym_sec->id].toc_off = 1; |
| if (recur != 0) |
| { |
| sym_sec->makes_toc_func_call = 1; |
| ret = 1; |
| break; |
| } |
| } |
| else |
| { |
| /* Unknown result. Continue checking. */ |
| ret = 2; |
| } |
| } |
| } |
| |
| if (local_syms != NULL |
| && (elf_tdata (isec->owner)->symtab_hdr.contents |
| != (unsigned char *) local_syms)) |
| free (local_syms); |
| if (elf_section_data (isec)->relocs != relstart) |
| free (relstart); |
| |
| return ret; |
| } |
| |
| /* The linker repeatedly calls this function for each input section, |
| in the order that input sections are linked into output sections. |
| Build lists of input sections to determine groupings between which |
| we may insert linker stubs. */ |
| |
| bfd_boolean |
| ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec) |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| if ((isec->output_section->flags & SEC_CODE) != 0 |
| && isec->output_section->index <= htab->top_index) |
| { |
| asection **list = htab->input_list + isec->output_section->index; |
| /* Steal the link_sec pointer for our list. */ |
| #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
| /* This happens to make the list in reverse order, |
| which is what we want. */ |
| PREV_SEC (isec) = *list; |
| *list = isec; |
| } |
| |
| if (htab->multi_toc_needed) |
| { |
| /* If a code section has a function that uses the TOC then we need |
| to use the right TOC (obviously). Also, make sure that .opd gets |
| the correct TOC value for R_PPC64_TOC relocs that don't have or |
| can't find their function symbol (shouldn't ever happen now). |
| Also specially treat .fixup for the linux kernel. .fixup |
| contains branches, but only back to the function that hit an |
| exception. */ |
| if (isec->has_toc_reloc |
| || (isec->flags & SEC_CODE) == 0 |
| || strcmp (isec->name, ".fixup") == 0) |
| { |
| if (elf_gp (isec->owner) != 0) |
| htab->toc_curr = elf_gp (isec->owner); |
| } |
| else if (htab->stub_group[isec->id].toc_off == 0) |
| { |
| int ret = toc_adjusting_stub_needed (info, isec); |
| if (ret < 0) |
| return FALSE; |
| else |
| isec->makes_toc_func_call = ret & 1; |
| } |
| } |
| |
| /* Functions that don't use the TOC can belong in any TOC group. |
| Use the last TOC base. This happens to make _init and _fini |
| pasting work. */ |
| htab->stub_group[isec->id].toc_off = htab->toc_curr; |
| return TRUE; |
| } |
| |
| /* See whether we can group stub sections together. Grouping stub |
| sections may result in fewer stubs. More importantly, we need to |
| put all .init* and .fini* stubs at the beginning of the .init or |
| .fini output sections respectively, because glibc splits the |
| _init and _fini functions into multiple parts. Putting a stub in |
| the middle of a function is not a good idea. */ |
| |
| static void |
| group_sections (struct ppc_link_hash_table *htab, |
| bfd_size_type stub_group_size, |
| bfd_boolean stubs_always_before_branch) |
| { |
| asection **list; |
| bfd_size_type stub14_group_size; |
| bfd_boolean suppress_size_errors; |
| |
| suppress_size_errors = FALSE; |
| stub14_group_size = stub_group_size; |
| if (stub_group_size == 1) |
| { |
| /* Default values. */ |
| if (stubs_always_before_branch) |
| { |
| stub_group_size = 0x1e00000; |
| stub14_group_size = 0x7800; |
| } |
| else |
| { |
| stub_group_size = 0x1c00000; |
| stub14_group_size = 0x7000; |
| } |
| suppress_size_errors = TRUE; |
| } |
| |
| list = htab->input_list + htab->top_index; |
| do |
| { |
| asection *tail = *list; |
| while (tail != NULL) |
| { |
| asection *curr; |
| asection *prev; |
| bfd_size_type total; |
| bfd_boolean big_sec; |
| bfd_vma curr_toc; |
| |
| curr = tail; |
| total = tail->size; |
| big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch |
| ? stub14_group_size : stub_group_size); |
| if (big_sec && !suppress_size_errors) |
| (*_bfd_error_handler) (_("%B section %A exceeds stub group size"), |
| tail->owner, tail); |
| curr_toc = htab->stub_group[tail->id].toc_off; |
| |
| while ((prev = PREV_SEC (curr)) != NULL |
| && ((total += curr->output_offset - prev->output_offset) |
| < (ppc64_elf_section_data (prev)->has_14bit_branch |
| ? stub14_group_size : stub_group_size)) |
| && htab->stub_group[prev->id].toc_off == curr_toc) |
| curr = prev; |
| |
| /* OK, the size from the start of CURR to the end is less |
| than stub_group_size and thus can be handled by one stub |
| section. (or the tail section is itself larger than |
| stub_group_size, in which case we may be toast.) We |
| should really be keeping track of the total size of stubs |
| added here, as stubs contribute to the final output |
| section size. That's a little tricky, and this way will |
| only break if stubs added make the total size more than |
| 2^25, ie. for the default stub_group_size, if stubs total |
| more than 2097152 bytes, or nearly 75000 plt call stubs. */ |
| do |
| { |
| prev = PREV_SEC (tail); |
| /* Set up this stub group. */ |
| htab->stub_group[tail->id].link_sec = curr; |
| } |
| while (tail != curr && (tail = prev) != NULL); |
| |
| /* But wait, there's more! Input sections up to stub_group_size |
| bytes before the stub section can be handled by it too. |
| Don't do this if we have a really large section after the |
| stubs, as adding more stubs increases the chance that |
| branches may not reach into the stub section. */ |
| if (!stubs_always_before_branch && !big_sec) |
| { |
| total = 0; |
| while (prev != NULL |
| && ((total += tail->output_offset - prev->output_offset) |
| < (ppc64_elf_section_data (prev)->has_14bit_branch |
| ? stub14_group_size : stub_group_size)) |
| && htab->stub_group[prev->id].toc_off == curr_toc) |
| { |
| tail = prev; |
| prev = PREV_SEC (tail); |
| htab->stub_group[tail->id].link_sec = curr; |
| } |
| } |
| tail = prev; |
| } |
| } |
| while (list-- != htab->input_list); |
| free (htab->input_list); |
| #undef PREV_SEC |
| } |
| |
| /* Determine and set the size of the stub section for a final link. |
| |
| The basic idea here is to examine all the relocations looking for |
| PC-relative calls to a target that is unreachable with a "bl" |
| instruction. */ |
| |
| bfd_boolean |
| ppc64_elf_size_stubs (bfd *output_bfd, |
| struct bfd_link_info *info, |
| bfd_signed_vma group_size, |
| asection *(*add_stub_section) (const char *, asection *), |
| void (*layout_sections_again) (void)) |
| { |
| bfd_size_type stub_group_size; |
| bfd_boolean stubs_always_before_branch; |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| /* Stash our params away. */ |
| htab->add_stub_section = add_stub_section; |
| htab->layout_sections_again = layout_sections_again; |
| stubs_always_before_branch = group_size < 0; |
| if (group_size < 0) |
| stub_group_size = -group_size; |
| else |
| stub_group_size = group_size; |
| |
| group_sections (htab, stub_group_size, stubs_always_before_branch); |
| |
| while (1) |
| { |
| bfd *input_bfd; |
| unsigned int bfd_indx; |
| asection *stub_sec; |
| |
| htab->stub_iteration += 1; |
| |
| for (input_bfd = info->input_bfds, bfd_indx = 0; |
| input_bfd != NULL; |
| input_bfd = input_bfd->link_next, bfd_indx++) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| asection *section; |
| Elf_Internal_Sym *local_syms = NULL; |
| |
| if (!is_ppc64_elf_target (input_bfd->xvec)) |
| continue; |
| |
| /* We'll need the symbol table in a second. */ |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| if (symtab_hdr->sh_info == 0) |
| continue; |
| |
| /* Walk over each section attached to the input bfd. */ |
| for (section = input_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| |
| /* If there aren't any relocs, then there's nothing more |
| to do. */ |
| if ((section->flags & SEC_RELOC) == 0 |
| || (section->flags & SEC_ALLOC) == 0 |
| || (section->flags & SEC_LOAD) == 0 |
| || (section->flags & SEC_CODE) == 0 |
| || section->reloc_count == 0) |
| continue; |
| |
| /* If this section is a link-once section that will be |
| discarded, then don't create any stubs. */ |
| if (section->output_section == NULL |
| || section->output_section->owner != output_bfd) |
| continue; |
| |
| /* Get the relocs. */ |
| internal_relocs |
| = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, |
| info->keep_memory); |
| if (internal_relocs == NULL) |
| goto error_ret_free_local; |
| |
| /* Now examine each relocation. */ |
| irela = internal_relocs; |
| irelaend = irela + section->reloc_count; |
| for (; irela < irelaend; irela++) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| unsigned int r_indx; |
| enum ppc_stub_type stub_type; |
| struct ppc_stub_hash_entry *stub_entry; |
| asection *sym_sec, *code_sec; |
| bfd_vma sym_value; |
| bfd_vma destination; |
| bfd_boolean ok_dest; |
| struct ppc_link_hash_entry *hash; |
| struct ppc_link_hash_entry *fdh; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| char *stub_name; |
| const asection *id_sec; |
| long *opd_adjust; |
| |
| r_type = ELF64_R_TYPE (irela->r_info); |
| r_indx = ELF64_R_SYM (irela->r_info); |
| |
| if (r_type >= R_PPC64_max) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| goto error_ret_free_internal; |
| } |
| |
| /* Only look for stubs on branch instructions. */ |
| if (r_type != R_PPC64_REL24 |
| && r_type != R_PPC64_REL14 |
| && r_type != R_PPC64_REL14_BRTAKEN |
| && r_type != R_PPC64_REL14_BRNTAKEN) |
| continue; |
| |
| /* Now determine the call target, its name, value, |
| section. */ |
| if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| r_indx, input_bfd)) |
| goto error_ret_free_internal; |
| hash = (struct ppc_link_hash_entry *) h; |
| |
| ok_dest = FALSE; |
| fdh = NULL; |
| sym_value = 0; |
| if (hash == NULL) |
| { |
| sym_value = sym->st_value; |
| ok_dest = TRUE; |
| } |
| else if (hash->elf.root.type == bfd_link_hash_defined |
| || hash->elf.root.type == bfd_link_hash_defweak) |
| { |
| sym_value = hash->elf.root.u.def.value; |
| if (sym_sec->output_section != NULL) |
| ok_dest = TRUE; |
| } |
| else if (hash->elf.root.type == bfd_link_hash_undefweak |
| || hash->elf.root.type == bfd_link_hash_undefined) |
| { |
| /* Recognise an old ABI func code entry sym, and |
| use the func descriptor sym instead if it is |
| defined. */ |
| if (hash->elf.root.root.string[0] == '.' |
| && (fdh = get_fdh (hash, htab)) != NULL) |
| { |
| if (fdh->elf.root.type == bfd_link_hash_defined |
| || fdh->elf.root.type == bfd_link_hash_defweak) |
| { |
| sym_sec = fdh->elf.root.u.def.section; |
| sym_value = fdh->elf.root.u.def.value; |
| if (sym_sec->output_section != NULL) |
| ok_dest = TRUE; |
| } |
| else |
| fdh = NULL; |
| } |
| } |
| else |
| { |
| bfd_set_error (bfd_error_bad_value); |
| goto error_ret_free_internal; |
| } |
| |
| destination = 0; |
| if (ok_dest) |
| { |
| sym_value += irela->r_addend; |
| destination = (sym_value |
| + sym_sec->output_offset |
| + sym_sec->output_section->vma); |
| } |
| |
| code_sec = sym_sec; |
| opd_adjust = get_opd_info (sym_sec); |
| if (opd_adjust != NULL) |
| { |
| bfd_vma dest; |
| |
| if (hash == NULL) |
| { |
| long adjust = opd_adjust[sym_value / 8]; |
| if (adjust == -1) |
| continue; |
| sym_value += adjust; |
| } |
| dest = opd_entry_value (sym_sec, sym_value, |
| &code_sec, &sym_value); |
| if (dest != (bfd_vma) -1) |
| { |
| destination = dest; |
| if (fdh != NULL) |
| { |
| /* Fixup old ABI sym to point at code |
| entry. */ |
| hash->elf.root.type = bfd_link_hash_defweak; |
| hash->elf.root.u.def.section = code_sec; |
| hash->elf.root.u.def.value = sym_value; |
| } |
| } |
| } |
| |
| /* Determine what (if any) linker stub is needed. */ |
| stub_type = ppc_type_of_stub (section, irela, &hash, |
| destination); |
| |
| if (stub_type != ppc_stub_plt_call) |
| { |
| /* Check whether we need a TOC adjusting stub. |
| Since the linker pastes together pieces from |
| different object files when creating the |
| _init and _fini functions, it may be that a |
| call to what looks like a local sym is in |
| fact a call needing a TOC adjustment. */ |
| if (code_sec != NULL |
| && code_sec->output_section != NULL |
| && (htab->stub_group[code_sec->id].toc_off |
| != htab->stub_group[section->id].toc_off) |
| && (code_sec->has_toc_reloc |
| || code_sec->makes_toc_func_call)) |
| stub_type = ppc_stub_long_branch_r2off; |
| } |
| |
| if (stub_type == ppc_stub_none) |
| continue; |
| |
| /* __tls_get_addr calls might be eliminated. */ |
| if (stub_type != ppc_stub_plt_call |
| && hash != NULL |
| && (hash == htab->tls_get_addr |
| || hash == htab->tls_get_addr_fd) |
| && section->has_tls_reloc |
| && irela != internal_relocs) |
| { |
| /* Get tls info. */ |
| char *tls_mask; |
| |
| if (!get_tls_mask (&tls_mask, NULL, &local_syms, |
| irela - 1, input_bfd)) |
| goto error_ret_free_internal; |
| if (*tls_mask != 0) |
| continue; |
| } |
| |
| /* Support for grouping stub sections. */ |
| id_sec = htab->stub_group[section->id].link_sec; |
| |
| /* Get the name of this stub. */ |
| stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela); |
| if (!stub_name) |
| goto error_ret_free_internal; |
| |
| stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, |
| stub_name, FALSE, FALSE); |
| if (stub_entry != NULL) |
| { |
| /* The proper stub has already been created. */ |
| free (stub_name); |
| continue; |
| } |
| |
| stub_entry = ppc_add_stub (stub_name, section, htab); |
| if (stub_entry == NULL) |
| { |
| free (stub_name); |
| error_ret_free_internal: |
| if (elf_section_data (section)->relocs == NULL) |
| free (internal_relocs); |
| error_ret_free_local: |
| if (local_syms != NULL |
| && (symtab_hdr->contents |
| != (unsigned char *) local_syms)) |
| free (local_syms); |
| return FALSE; |
| } |
| |
| stub_entry->stub_type = stub_type; |
| stub_entry->target_value = sym_value; |
| stub_entry->target_section = code_sec; |
| stub_entry->h = hash; |
| stub_entry->addend = irela->r_addend; |
| |
| if (stub_entry->h != NULL) |
| htab->stub_globals += 1; |
| } |
| |
| /* We're done with the internal relocs, free them. */ |
| if (elf_section_data (section)->relocs != internal_relocs) |
| free (internal_relocs); |
| } |
| |
| if (local_syms != NULL |
| && symtab_hdr->contents != (unsigned char *) local_syms) |
| { |
| if (!info->keep_memory) |
| free (local_syms); |
| else |
| symtab_hdr->contents = (unsigned char *) local_syms; |
| } |
| } |
| |
| /* We may have added some stubs. Find out the new size of the |
| stub sections. */ |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; |
| stub_sec = stub_sec->next) |
| if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) |
| { |
| stub_sec->rawsize = stub_sec->size; |
| stub_sec->size = 0; |
| stub_sec->reloc_count = 0; |
| stub_sec->flags &= ~SEC_RELOC; |
| } |
| |
| htab->brlt->size = 0; |
| htab->brlt->reloc_count = 0; |
| htab->brlt->flags &= ~SEC_RELOC; |
| if (htab->relbrlt != NULL) |
| htab->relbrlt->size = 0; |
| |
| bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info); |
| |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; |
| stub_sec = stub_sec->next) |
| if ((stub_sec->flags & SEC_LINKER_CREATED) == 0 |
| && stub_sec->rawsize != stub_sec->size) |
| break; |
| |
| /* Exit from this loop when no stubs have been added, and no stubs |
| have changed size. */ |
| if (stub_sec == NULL) |
| break; |
| |
| /* Ask the linker to do its stuff. */ |
| (*htab->layout_sections_again) (); |
| } |
| |
| /* It would be nice to strip htab->brlt from the output if the |
| section is empty, but it's too late. If we strip sections here, |
| the dynamic symbol table is corrupted since the section symbol |
| for the stripped section isn't written. */ |
| |
| return TRUE; |
| } |
| |
| /* Called after we have determined section placement. If sections |
| move, we'll be called again. Provide a value for TOCstart. */ |
| |
| bfd_vma |
| ppc64_elf_toc (bfd *obfd) |
| { |
| asection *s; |
| bfd_vma TOCstart; |
| |
| /* The TOC consists of sections .got, .toc, .tocbss, .plt in that |
| order. The TOC starts where the first of these sections starts. */ |
| s = bfd_get_section_by_name (obfd, ".got"); |
| if (s == NULL) |
| s = bfd_get_section_by_name (obfd, ".toc"); |
| if (s == NULL) |
| s = bfd_get_section_by_name (obfd, ".tocbss"); |
| if (s == NULL) |
| s = bfd_get_section_by_name (obfd, ".plt"); |
| if (s == NULL) |
| { |
| /* This may happen for |
| o references to TOC base (SYM@toc / TOC[tc0]) without a |
| .toc directive |
| o bad linker script |
| o --gc-sections and empty TOC sections |
| |
| FIXME: Warn user? */ |
| |
| /* Look for a likely section. We probably won't even be |
| using TOCstart. */ |
| for (s = obfd->sections; s != NULL; s = s->next) |
| if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY)) |
| == (SEC_ALLOC | SEC_SMALL_DATA)) |
| break; |
| if (s == NULL) |
| for (s = obfd->sections; s != NULL; s = s->next) |
| if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA)) |
| == (SEC_ALLOC | SEC_SMALL_DATA)) |
| break; |
| if (s == NULL) |
| for (s = obfd->sections; s != NULL; s = s->next) |
| if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) |
| break; |
| if (s == NULL) |
| for (s = obfd->sections; s != NULL; s = s->next) |
| if ((s->flags & SEC_ALLOC) == SEC_ALLOC) |
| break; |
| } |
| |
| TOCstart = 0; |
| if (s != NULL) |
| TOCstart = s->output_section->vma + s->output_offset; |
| |
| return TOCstart; |
| } |
| |
| /* Build all the stubs associated with the current output file. |
| The stubs are kept in a hash table attached to the main linker |
| hash table. This function is called via gldelf64ppc_finish. */ |
| |
| bfd_boolean |
| ppc64_elf_build_stubs (bfd_boolean emit_stub_syms, |
| struct bfd_link_info *info, |
| char **stats) |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| asection *stub_sec; |
| bfd_byte *p; |
| int stub_sec_count = 0; |
| |
| htab->emit_stub_syms = emit_stub_syms; |
| |
| /* Allocate memory to hold the linker stubs. */ |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; |
| stub_sec = stub_sec->next) |
| if ((stub_sec->flags & SEC_LINKER_CREATED) == 0 |
| && stub_sec->size != 0) |
| { |
| stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size); |
| if (stub_sec->contents == NULL) |
| return FALSE; |
| /* We want to check that built size is the same as calculated |
| size. rawsize is a convenient location to use. */ |
| stub_sec->rawsize = stub_sec->size; |
| stub_sec->size = 0; |
| } |
| |
| if (htab->glink != NULL && htab->glink->size != 0) |
| { |
| unsigned int indx; |
| bfd_vma plt0; |
| |
| /* Build the .glink plt call stub. */ |
| if (htab->emit_stub_syms) |
| { |
| struct elf_link_hash_entry *h; |
| h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE); |
| if (h == NULL) |
| return FALSE; |
| if (h->root.type == bfd_link_hash_new) |
| { |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = htab->glink; |
| h->root.u.def.value = 8; |
| h->ref_regular = 1; |
| h->def_regular = 1; |
| h->ref_regular_nonweak = 1; |
| h->forced_local = 1; |
| h->non_elf = 0; |
| } |
| } |
| p = htab->glink->contents; |
| plt0 = (htab->plt->output_section->vma |
| + htab->plt->output_offset |
| - (htab->glink->output_section->vma |
| + htab->glink->output_offset |
| + 16)); |
| bfd_put_64 (htab->glink->owner, plt0, p); |
| p += 8; |
| bfd_put_32 (htab->glink->owner, MFLR_R12, p); |
| p += 4; |
| bfd_put_32 (htab->glink->owner, BCL_20_31, p); |
| p += 4; |
| bfd_put_32 (htab->glink->owner, MFLR_R11, p); |
| p += 4; |
| bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p); |
| p += 4; |
| bfd_put_32 (htab->glink->owner, MTLR_R12, p); |
| p += 4; |
| bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p); |
| p += 4; |
| bfd_put_32 (htab->glink->owner, LD_R11_0R12, p); |
| p += 4; |
| bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p); |
| p += 4; |
| bfd_put_32 (htab->glink->owner, MTCTR_R11, p); |
| p += 4; |
| bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p); |
| p += 4; |
| bfd_put_32 (htab->glink->owner, BCTR, p); |
| p += 4; |
| while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE) |
| { |
| bfd_put_32 (htab->glink->owner, NOP, p); |
| p += 4; |
| } |
| |
| /* Build the .glink lazy link call stubs. */ |
| indx = 0; |
| while (p < htab->glink->contents + htab->glink->size) |
| { |
| if (indx < 0x8000) |
| { |
| bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p); |
| p += 4; |
| } |
| else |
| { |
| bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p); |
| p += 4; |
| bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p); |
| p += 4; |
| } |
| bfd_put_32 (htab->glink->owner, |
| B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p); |
| indx++; |
| p += 4; |
| } |
| htab->glink->rawsize = p - htab->glink->contents; |
| } |
| |
| if (htab->brlt->size != 0) |
| { |
| htab->brlt->contents = bfd_zalloc (htab->brlt->owner, |
| htab->brlt->size); |
| if (htab->brlt->contents == NULL) |
| return FALSE; |
| } |
| if (htab->relbrlt != NULL && htab->relbrlt->size != 0) |
| { |
| htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner, |
| htab->relbrlt->size); |
| if (htab->relbrlt->contents == NULL) |
| return FALSE; |
| } |
| |
| /* Build the stubs as directed by the stub hash table. */ |
| bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info); |
| |
| if (htab->relbrlt != NULL) |
| htab->relbrlt->reloc_count = 0; |
| |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; |
| stub_sec = stub_sec->next) |
| if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) |
| { |
| stub_sec_count += 1; |
| if (stub_sec->rawsize != stub_sec->size) |
| break; |
| } |
| |
| if (stub_sec != NULL |
| || htab->glink->rawsize != htab->glink->size) |
| { |
| htab->stub_error = TRUE; |
| (*_bfd_error_handler) (_("stubs don't match calculated size")); |
| } |
| |
| if (htab->stub_error) |
| return FALSE; |
| |
| if (stats != NULL) |
| { |
| *stats = bfd_malloc (500); |
| if (*stats == NULL) |
| return FALSE; |
| |
| sprintf (*stats, _("linker stubs in %u group%s\n" |
| " branch %lu\n" |
| " toc adjust %lu\n" |
| " long branch %lu\n" |
| " long toc adj %lu\n" |
| " plt call %lu"), |
| stub_sec_count, |
| stub_sec_count == 1 ? "" : "s", |
| htab->stub_count[ppc_stub_long_branch - 1], |
| htab->stub_count[ppc_stub_long_branch_r2off - 1], |
| htab->stub_count[ppc_stub_plt_branch - 1], |
| htab->stub_count[ppc_stub_plt_branch_r2off - 1], |
| htab->stub_count[ppc_stub_plt_call - 1]); |
| } |
| return TRUE; |
| } |
| |
| /* This function undoes the changes made by add_symbol_adjust. */ |
| |
| static bfd_boolean |
| undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) |
| { |
| struct ppc_link_hash_entry *eh; |
| |
| if (h->root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined) |
| return TRUE; |
| |
| eh->elf.root.type = bfd_link_hash_undefined; |
| return TRUE; |
| } |
| |
| void |
| ppc64_elf_restore_symbols (struct bfd_link_info *info) |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info); |
| } |
| |
| /* What to do when ld finds relocations against symbols defined in |
| discarded sections. */ |
| |
| static unsigned int |
| ppc64_elf_action_discarded (asection *sec) |
| { |
| if (strcmp (".opd", sec->name) == 0) |
| return 0; |
| |
| if (strcmp (".toc", sec->name) == 0) |
| return 0; |
| |
| if (strcmp (".toc1", sec->name) == 0) |
| return 0; |
| |
| return _bfd_elf_default_action_discarded (sec); |
| } |
| |
| /* The RELOCATE_SECTION function is called by the ELF backend linker |
| to handle the relocations for a section. |
| |
| The relocs are always passed as Rela structures; if the section |
| actually uses Rel structures, the r_addend field will always be |
| zero. |
| |
| This function is responsible for adjust the section contents as |
| necessary, and (if using Rela relocs and generating a |
| relocatable output file) adjusting the reloc addend as |
| necessary. |
| |
| This function does not have to worry about setting the reloc |
| address or the reloc symbol index. |
| |
| LOCAL_SYMS is a pointer to the swapped in local symbols. |
| |
| LOCAL_SECTIONS is an array giving the section in the input file |
| corresponding to the st_shndx field of each local symbol. |
| |
| The global hash table entry for the global symbols can be found |
| via elf_sym_hashes (input_bfd). |
| |
| When generating relocatable output, this function must handle |
| STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| going to be the section symbol corresponding to the output |
| section, which means that the addend must be adjusted |
| accordingly. */ |
| |
| static bfd_boolean |
| ppc64_elf_relocate_section (bfd *output_bfd, |
| struct bfd_link_info *info, |
| bfd *input_bfd, |
| asection *input_section, |
| bfd_byte *contents, |
| Elf_Internal_Rela *relocs, |
| Elf_Internal_Sym *local_syms, |
| asection **local_sections) |
| { |
| struct ppc_link_hash_table *htab; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| Elf_Internal_Rela *rel; |
| Elf_Internal_Rela *relend; |
| Elf_Internal_Rela outrel; |
| bfd_byte *loc; |
| struct got_entry **local_got_ents; |
| bfd_vma TOCstart; |
| bfd_boolean ret = TRUE; |
| bfd_boolean is_opd; |
| /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ |
| bfd_boolean is_power4 = FALSE; |
| bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0); |
| |
| /* Initialize howto table if needed. */ |
| if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| ppc_howto_init (); |
| |
| htab = ppc_hash_table (info); |
| |
| /* Don't relocate stub sections. */ |
| if (input_section->owner == htab->stub_bfd) |
| return TRUE; |
| |
| local_got_ents = elf_local_got_ents (input_bfd); |
| TOCstart = elf_gp (output_bfd); |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (input_bfd); |
| is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd; |
| |
| rel = relocs; |
| relend = relocs + input_section->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| bfd_vma addend, orig_addend; |
| bfd_reloc_status_type r; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| struct elf_link_hash_entry *h_elf; |
| struct ppc_link_hash_entry *h; |
| struct ppc_link_hash_entry *fdh; |
| const char *sym_name; |
| unsigned long r_symndx, toc_symndx; |
| char tls_mask, tls_gd, tls_type; |
| char sym_type; |
| bfd_vma relocation; |
| bfd_boolean unresolved_reloc; |
| bfd_boolean warned; |
| unsigned long insn, mask; |
| struct ppc_stub_hash_entry *stub_entry; |
| bfd_vma max_br_offset; |
| bfd_vma from; |
| |
| r_type = ELF64_R_TYPE (rel->r_info); |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| |
| /* For old style R_PPC64_TOC relocs with a zero symbol, use the |
| symbol of the previous ADDR64 reloc. The symbol gives us the |
| proper TOC base to use. */ |
| if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC) |
| && rel != relocs |
| && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64 |
| && is_opd) |
| r_symndx = ELF64_R_SYM (rel[-1].r_info); |
| |
| sym = NULL; |
| sec = NULL; |
| h_elf = NULL; |
| sym_name = NULL; |
| unresolved_reloc = FALSE; |
| warned = FALSE; |
| orig_addend = rel->r_addend; |
| |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| /* It's a local symbol. */ |
| long *opd_adjust; |
| |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
| sym_type = ELF64_ST_TYPE (sym->st_info); |
| relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| opd_adjust = get_opd_info (sec); |
| if (opd_adjust != NULL) |
| { |
| long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8]; |
| if (adjust == -1) |
| relocation = 0; |
| else |
| { |
| /* If this is a relocation against the opd section sym |
| and we have edited .opd, adjust the reloc addend so |
| that ld -r and ld --emit-relocs output is correct. |
| If it is a reloc against some other .opd symbol, |
| then the symbol value will be adjusted later. */ |
| if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| rel->r_addend += adjust; |
| else |
| relocation += adjust; |
| } |
| } |
| } |
| else |
| { |
| RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| r_symndx, symtab_hdr, sym_hashes, |
| h_elf, sec, relocation, |
| unresolved_reloc, warned); |
| sym_name = h_elf->root.root.string; |
| sym_type = h_elf->type; |
| } |
| h = (struct ppc_link_hash_entry *) h_elf; |
| |
| if (sec != NULL && elf_discarded_section (sec)) |
| { |
| /* For relocs against symbols from removed linkonce sections, |
| or sections discarded by a linker script, we just want the |
| section contents zeroed. Avoid any special processing. */ |
| _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd, |
| contents + rel->r_offset); |
| rel->r_info = 0; |
| rel->r_addend = 0; |
| continue; |
| } |
| |
| if (info->relocatable) |
| continue; |
| |
| /* TLS optimizations. Replace instruction sequences and relocs |
| based on information we collected in tls_optimize. We edit |
| RELOCS so that --emit-relocs will output something sensible |
| for the final instruction stream. */ |
| tls_mask = 0; |
| tls_gd = 0; |
| toc_symndx = 0; |
| if (IS_PPC64_TLS_RELOC (r_type)) |
| { |
| if (h != NULL) |
| tls_mask = h->tls_mask; |
| else if (local_got_ents != NULL) |
| { |
| char *lgot_masks; |
| lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info); |
| tls_mask = lgot_masks[r_symndx]; |
| } |
| if (tls_mask == 0 && r_type == R_PPC64_TLS) |
| { |
| /* Check for toc tls entries. */ |
| char *toc_tls; |
| |
| if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms, |
| rel, input_bfd)) |
| return FALSE; |
| |
| if (toc_tls) |
| tls_mask = *toc_tls; |
| } |
| } |
| |
| /* Check that tls relocs are used with tls syms, and non-tls |
| relocs are used with non-tls syms. */ |
| if (r_symndx != 0 |
| && r_type != R_PPC64_NONE |
| && (h == NULL |
| || h->elf.root.type == bfd_link_hash_defined |
| || h->elf.root.type == bfd_link_hash_defweak) |
| && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS)) |
| { |
| if (r_type == R_PPC64_TLS && tls_mask != 0) |
| /* R_PPC64_TLS is OK against a symbol in the TOC. */ |
| ; |
| else |
| (*_bfd_error_handler) |
| (sym_type == STT_TLS |
| ? _("%B(%A+0x%lx): %s used with TLS symbol %s") |
| : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"), |
| input_bfd, |
| input_section, |
| (long) rel->r_offset, |
| ppc64_elf_howto_table[r_type]->name, |
| sym_name); |
| } |
| |
| /* Ensure reloc mapping code below stays sane. */ |
| if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1 |
| || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1 |
| || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3) |
| || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3) |
| || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3) |
| || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3) |
| || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3) |
| || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3) |
| || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3) |
| || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3)) |
| abort (); |
| |
| switch (r_type) |
| { |
| default: |
| break; |
| |
| case R_PPC64_TOC16: |
| case R_PPC64_TOC16_LO: |
| case R_PPC64_TOC16_DS: |
| case R_PPC64_TOC16_LO_DS: |
| { |
| /* Check for toc tls entries. */ |
| char *toc_tls; |
| int retval; |
| |
| retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms, |
| rel, input_bfd); |
| if (retval == 0) |
| return FALSE; |
| |
| if (toc_tls) |
| { |
| tls_mask = *toc_tls; |
| if (r_type == R_PPC64_TOC16_DS |
| || r_type == R_PPC64_TOC16_LO_DS) |
| { |
| if (tls_mask != 0 |
| && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0) |
| goto toctprel; |
| } |
| else |
| { |
| /* If we found a GD reloc pair, then we might be |
| doing a GD->IE transition. */ |
| if (retval == 2) |
| { |
| tls_gd = TLS_TPRELGD; |
| if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) |
| goto tls_get_addr_check; |
| } |
| else if (retval == 3) |
| { |
| if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) |
| goto tls_get_addr_check; |
| } |
| } |
| } |
| } |
| break; |
| |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| if (tls_mask != 0 |
| && (tls_mask & TLS_TPREL) == 0) |
| { |
| toctprel: |
| insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); |
| insn &= 31 << 21; |
| insn |= 0x3c0d0000; /* addis 0,13,0 */ |
| bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset); |
| r_type = R_PPC64_TPREL16_HA; |
| if (toc_symndx != 0) |
| { |
| rel->r_info = ELF64_R_INFO (toc_symndx, r_type); |
| /* We changed the symbol. Start over in order to |
| get h, sym, sec etc. right. */ |
| rel--; |
| continue; |
| } |
| else |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| break; |
| |
| case R_PPC64_TLS: |
| if (tls_mask != 0 |
| && (tls_mask & TLS_TPREL) == 0) |
| { |
| bfd_vma rtra; |
| insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| if ((insn & ((0x3f << 26) | (31 << 11))) |
| == ((31 << 26) | (13 << 11))) |
| rtra = insn & ((1 << 26) - (1 << 16)); |
| else if ((insn & ((0x3f << 26) | (31 << 16))) |
| == ((31 << 26) | (13 << 16))) |
| rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5); |
| else |
| abort (); |
| if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1) |
| /* add -> addi. */ |
| insn = 14 << 26; |
| else if ((insn & (31 << 1)) == 23 << 1 |
| && ((insn & (31 << 6)) < 14 << 6 |
| || ((insn & (31 << 6)) >= 16 << 6 |
| && (insn & (31 << 6)) < 24 << 6))) |
| /* load and store indexed -> dform. */ |
| insn = (32 | ((insn >> 6) & 31)) << 26; |
| else if ((insn & (31 << 1)) == 21 << 1 |
| && (insn & (0x1a << 6)) == 0) |
| /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ |
| insn = (((58 | ((insn >> 6) & 4)) << 26) |
| | ((insn >> 6) & 1)); |
| else if ((insn & (31 << 1)) == 21 << 1 |
| && (insn & ((1 << 11) - (1 << 1))) == 341 << 1) |
| /* lwax -> lwa. */ |
| insn = (58 << 26) | 2; |
| else |
| abort (); |
| insn |= rtra; |
| bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| /* Was PPC64_TLS which sits on insn boundary, now |
| PPC64_TPREL16_LO which is at low-order half-word. */ |
| rel->r_offset += d_offset; |
| r_type = R_PPC64_TPREL16_LO; |
| if (toc_symndx != 0) |
| { |
| rel->r_info = ELF64_R_INFO (toc_symndx, r_type); |
| /* We changed the symbol. Start over in order to |
| get h, sym, sec etc. right. */ |
| rel--; |
| continue; |
| } |
| else |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| break; |
| |
| case R_PPC64_GOT_TLSGD16_HI: |
| case R_PPC64_GOT_TLSGD16_HA: |
| tls_gd = TLS_TPRELGD; |
| if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) |
| goto tls_gdld_hi; |
| break; |
| |
| case R_PPC64_GOT_TLSLD16_HI: |
| case R_PPC64_GOT_TLSLD16_HA: |
| if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) |
| { |
| tls_gdld_hi: |
| if ((tls_mask & tls_gd) != 0) |
| r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) |
| + R_PPC64_GOT_TPREL16_DS); |
| else |
| { |
| bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); |
| rel->r_offset -= d_offset; |
| r_type = R_PPC64_NONE; |
| } |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| break; |
| |
| case R_PPC64_GOT_TLSGD16: |
| case R_PPC64_GOT_TLSGD16_LO: |
| tls_gd = TLS_TPRELGD; |
| if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) |
| goto tls_get_addr_check; |
| break; |
| |
| case R_PPC64_GOT_TLSLD16: |
| case R_PPC64_GOT_TLSLD16_LO: |
| if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) |
| { |
| tls_get_addr_check: |
| if (rel + 1 < relend) |
| { |
| enum elf_ppc64_reloc_type r_type2; |
| unsigned long r_symndx2; |
| struct elf_link_hash_entry *h2; |
| bfd_vma insn1, insn2, insn3; |
| bfd_vma offset; |
| |
| /* The next instruction should be a call to |
| __tls_get_addr. Peek at the reloc to be sure. */ |
| r_type2 = ELF64_R_TYPE (rel[1].r_info); |
| r_symndx2 = ELF64_R_SYM (rel[1].r_info); |
| if (r_symndx2 < symtab_hdr->sh_info |
| || (r_type2 != R_PPC64_REL14 |
| && r_type2 != R_PPC64_REL14_BRTAKEN |
| && r_type2 != R_PPC64_REL14_BRNTAKEN |
| && r_type2 != R_PPC64_REL24)) |
| break; |
| |
| h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info]; |
| while (h2->root.type == bfd_link_hash_indirect |
| || h2->root.type == bfd_link_hash_warning) |
| h2 = (struct elf_link_hash_entry *) h2->root.u.i.link; |
| if (h2 == NULL || (h2 != &htab->tls_get_addr->elf |
| && h2 != &htab->tls_get_addr_fd->elf)) |
| break; |
| |
| /* OK, it checks out. Replace the call. */ |
| offset = rel[1].r_offset; |
| insn1 = bfd_get_32 (output_bfd, |
| contents + rel->r_offset - d_offset); |
| insn3 = bfd_get_32 (output_bfd, |
| contents + offset + 4); |
| if ((tls_mask & tls_gd) != 0) |
| { |
| /* IE */ |
| insn1 &= (1 << 26) - (1 << 2); |
| insn1 |= 58 << 26; /* ld */ |
| insn2 = 0x7c636a14; /* add 3,3,13 */ |
| rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE); |
| if ((tls_mask & TLS_EXPLICIT) == 0) |
| r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) |
| + R_PPC64_GOT_TPREL16_DS); |
| else |
| r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16; |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| else |
| { |
| /* LE */ |
| insn1 = 0x3c6d0000; /* addis 3,13,0 */ |
| insn2 = 0x38630000; /* addi 3,3,0 */ |
| if (tls_gd == 0) |
| { |
| /* Was an LD reloc. */ |
| r_symndx = 0; |
| rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| } |
| else if (toc_symndx != 0) |
| r_symndx = toc_symndx; |
| r_type = R_PPC64_TPREL16_HA; |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| rel[1].r_info = ELF64_R_INFO (r_symndx, |
| R_PPC64_TPREL16_LO); |
| rel[1].r_offset += d_offset; |
| } |
| if (insn3 == NOP |
| || insn3 == CROR_151515 || insn3 == CROR_313131) |
| { |
| insn3 = insn2; |
| insn2 = NOP; |
| rel[1].r_offset += 4; |
| } |
| bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset); |
| bfd_put_32 (output_bfd, insn2, contents + offset); |
| bfd_put_32 (output_bfd, insn3, contents + offset + 4); |
| if (tls_gd == 0 || toc_symndx != 0) |
| { |
| /* We changed the symbol. Start over in order |
| to get h, sym, sec etc. right. */ |
| rel--; |
| continue; |
| } |
| } |
| } |
| break; |
| |
| case R_PPC64_DTPMOD64: |
| if (rel + 1 < relend |
| && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) |
| && rel[1].r_offset == rel->r_offset + 8) |
| { |
| if ((tls_mask & TLS_GD) == 0) |
| { |
| rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE); |
| if ((tls_mask & TLS_TPRELGD) != 0) |
| r_type = R_PPC64_TPREL64; |
| else |
| { |
| bfd_put_64 (output_bfd, 1, contents + rel->r_offset); |
| r_type = R_PPC64_NONE; |
| } |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| } |
| else |
| { |
| if ((tls_mask & TLS_LD) == 0) |
| { |
| bfd_put_64 (output_bfd, 1, contents + rel->r_offset); |
| r_type = R_PPC64_NONE; |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| } |
| break; |
| |
| case R_PPC64_TPREL64: |
| if ((tls_mask & TLS_TPREL) == 0) |
| { |
| r_type = R_PPC64_NONE; |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| break; |
| } |
| |
| /* Handle other relocations that tweak non-addend part of insn. */ |
| insn = 0; |
| max_br_offset = 1 << 25; |
| addend = rel->r_addend; |
| switch (r_type) |
| { |
| default: |
| break; |
| |
| /* Branch taken prediction relocations. */ |
| case R_PPC64_ADDR14_BRTAKEN: |
| case R_PPC64_REL14_BRTAKEN: |
| insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
| /* Fall thru. */ |
| |
| /* Branch not taken prediction relocations. */ |
| case R_PPC64_ADDR14_BRNTAKEN: |
| case R_PPC64_REL14_BRNTAKEN: |
| insn |= bfd_get_32 (output_bfd, |
| contents + rel->r_offset) & ~(0x01 << 21); |
| /* Fall thru. */ |
| |
| case R_PPC64_REL14: |
| max_br_offset = 1 << 15; |
| /* Fall thru. */ |
| |
| case R_PPC64_REL24: |
| /* Calls to functions with a different TOC, such as calls to |
| shared objects, need to alter the TOC pointer. This is |
| done using a linkage stub. A REL24 branching to these |
| linkage stubs needs to be followed by a nop, as the nop |
| will be replaced with an instruction to restore the TOC |
| base pointer. */ |
| stub_entry = NULL; |
| fdh = h; |
| if (((h != NULL |
| && (((fdh = h->oh) != NULL |
| && fdh->elf.plt.plist != NULL) |
| || (fdh = h)->elf.plt.plist != NULL)) |
| || (sec != NULL |
| && sec->output_section != NULL |
| && sec->id <= htab->top_id |
| && (htab->stub_group[sec->id].toc_off |
| != htab->stub_group[input_section->id].toc_off))) |
| && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh, |
| rel, htab)) != NULL |
| && (stub_entry->stub_type == ppc_stub_plt_call |
| || stub_entry->stub_type == ppc_stub_plt_branch_r2off |
| || stub_entry->stub_type == ppc_stub_long_branch_r2off)) |
| { |
| bfd_boolean can_plt_call = FALSE; |
| |
| if (rel->r_offset + 8 <= input_section->size) |
| { |
| unsigned long nop; |
| nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
| if (nop == NOP |
| || nop == CROR_151515 || nop == CROR_313131) |
| { |
| bfd_put_32 (input_bfd, LD_R2_40R1, |
| contents + rel->r_offset + 4); |
| can_plt_call = TRUE; |
| } |
| } |
| |
| if (!can_plt_call) |
| { |
| if (stub_entry->stub_type == ppc_stub_plt_call) |
| { |
| /* If this is a plain branch rather than a branch |
| and link, don't require a nop. However, don't |
| allow tail calls in a shared library as they |
| will result in r2 being corrupted. */ |
| unsigned long br; |
| br = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| if (info->executable && (br & 1) == 0) |
| can_plt_call = TRUE; |
| else |
| stub_entry = NULL; |
| } |
| else if (h != NULL |
| && strcmp (h->elf.root.root.string, |
| ".__libc_start_main") == 0) |
| { |
| /* Allow crt1 branch to go via a toc adjusting stub. */ |
| can_plt_call = TRUE; |
| } |
| else |
| { |
| if (strcmp (input_section->output_section->name, |
| ".init") == 0 |
| || strcmp (input_section->output_section->name, |
| ".fini") == 0) |
| (*_bfd_error_handler) |
| (_("%B(%A+0x%lx): automatic multiple TOCs " |
| "not supported using your crt files; " |
| "recompile with -mminimal-toc or upgrade gcc"), |
| input_bfd, |
| input_section, |
| (long) rel->r_offset); |
| else |
| (*_bfd_error_handler) |
| (_("%B(%A+0x%lx): sibling call optimization to `%s' " |
| "does not allow automatic multiple TOCs; " |
| "recompile with -mminimal-toc or " |
| "-fno-optimize-sibling-calls, " |
| "or make `%s' extern"), |
| input_bfd, |
| input_section, |
| (long) rel->r_offset, |
| sym_name, |
| sym_name); |
| bfd_set_error (bfd_error_bad_value); |
| ret = FALSE; |
| } |
| } |
| |
| if (can_plt_call |
| && stub_entry->stub_type == ppc_stub_plt_call) |
| unresolved_reloc = FALSE; |
| } |
| |
| if (stub_entry == NULL |
| && get_opd_info (sec) != NULL) |
| { |
| /* The branch destination is the value of the opd entry. */ |
| bfd_vma off = (relocation + addend |
| - sec->output_section->vma |
| - sec->output_offset); |
| bfd_vma dest = opd_entry_value (sec, off, NULL, NULL); |
| if (dest != (bfd_vma) -1) |
| { |
| relocation = dest; |
| addend = 0; |
| } |
| } |
| |
| /* If the branch is out of reach we ought to have a long |
| branch stub. */ |
| from = (rel->r_offset |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| |
| if (stub_entry == NULL |
| && (relocation + addend - from + max_br_offset |
| >= 2 * max_br_offset) |
| && r_type != R_PPC64_ADDR14_BRTAKEN |
| && r_type != R_PPC64_ADDR14_BRNTAKEN) |
| stub_entry = ppc_get_stub_entry (input_section, sec, h, rel, |
| htab); |
| |
| if (stub_entry != NULL) |
| { |
| /* Munge up the value and addend so that we call the stub |
| rather than the procedure directly. */ |
| relocation = (stub_entry->stub_offset |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_sec->output_section->vma); |
| addend = 0; |
| } |
| |
| if (insn != 0) |
| { |
| if (is_power4) |
| { |
| /* Set 'a' bit. This is 0b00010 in BO field for branch |
| on CR(BI) insns (BO == 001at or 011at), and 0b01000 |
| for branch on CTR insns (BO == 1a00t or 1a01t). */ |
| if ((insn & (0x14 << 21)) == (0x04 << 21)) |
| insn |= 0x02 << 21; |
| else if ((insn & (0x14 << 21)) == (0x10 << 21)) |
| insn |= 0x08 << 21; |
| else |
| break; |
| } |
| else |
| { |
| /* Invert 'y' bit if not the default. */ |
| if ((bfd_signed_vma) (relocation + addend - from) < 0) |
| insn ^= 0x01 << 21; |
| } |
| |
| bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| } |
| |
| /* NOP out calls to undefined weak functions. |
| We can thus call a weak function without first |
| checking whether the function is defined. */ |
| else if (h != NULL |
| && h->elf.root.type == bfd_link_hash_undefweak |
| && r_type == R_PPC64_REL24 |
| && relocation == 0 |
| && addend == 0) |
| { |
| bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); |
| continue; |
| } |
| break; |
| } |
| |
| /* Set `addend'. */ |
| tls_type = 0; |
| switch (r_type) |
| { |
| default: |
| (*_bfd_error_handler) |
| (_("%B: unknown relocation type %d for symbol %s"), |
| input_bfd, (int) r_type, sym_name); |
| |
| bfd_set_error (bfd_error_bad_value); |
| ret = FALSE; |
| continue; |
| |
| case R_PPC64_NONE: |
| case R_PPC64_TLS: |
| case R_PPC64_GNU_VTINHERIT: |
| case R_PPC64_GNU_VTENTRY: |
| continue; |
| |
| /* GOT16 relocations. Like an ADDR16 using the symbol's |
| address in the GOT as relocation value instead of the |
| symbol's value itself. Also, create a GOT entry for the |
| symbol and put the symbol value there. */ |
| case R_PPC64_GOT_TLSGD16: |
| case R_PPC64_GOT_TLSGD16_LO: |
| case R_PPC64_GOT_TLSGD16_HI: |
| case R_PPC64_GOT_TLSGD16_HA: |
| tls_type = TLS_TLS | TLS_GD; |
| goto dogot; |
| |
| case R_PPC64_GOT_TLSLD16: |
| case R_PPC64_GOT_TLSLD16_LO: |
| case R_PPC64_GOT_TLSLD16_HI: |
| case R_PPC64_GOT_TLSLD16_HA: |
| tls_type = TLS_TLS | TLS_LD; |
| goto dogot; |
| |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| case R_PPC64_GOT_TPREL16_HI: |
| case R_PPC64_GOT_TPREL16_HA: |
| tls_type = TLS_TLS | TLS_TPREL; |
| goto dogot; |
| |
| case R_PPC64_GOT_DTPREL16_DS: |
| case R_PPC64_GOT_DTPREL16_LO_DS: |
| case R_PPC64_GOT_DTPREL16_HI: |
| case R_PPC64_GOT_DTPREL16_HA: |
| tls_type = TLS_TLS | TLS_DTPREL; |
| goto dogot; |
| |
| case R_PPC64_GOT16: |
| case R_PPC64_GOT16_LO: |
| case R_PPC64_GOT16_HI: |
| case R_PPC64_GOT16_HA: |
| case R_PPC64_GOT16_DS: |
| case R_PPC64_GOT16_LO_DS: |
| dogot: |
| { |
| /* Relocation is to the entry for this symbol in the global |
| offset table. */ |
| asection *got; |
| bfd_vma *offp; |
| bfd_vma off; |
| unsigned long indx = 0; |
| |
| if (tls_type == (TLS_TLS | TLS_LD) |
| && (h == NULL |
| || !h->elf.def_dynamic)) |
| offp = &ppc64_tlsld_got (input_bfd)->offset; |
| else |
| { |
| struct got_entry *ent; |
| |
| if (h != NULL) |
| { |
| bfd_boolean dyn = htab->elf.dynamic_sections_created; |
| if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, |
| &h->elf) |
| || (info->shared |
| && SYMBOL_REFERENCES_LOCAL (info, &h->elf))) |
| /* This is actually a static link, or it is a |
| -Bsymbolic link and the symbol is defined |
| locally, or the symbol was forced to be local |
| because of a version file. */ |
| ; |
| else |
| { |
| indx = h->elf.dynindx; |
| unresolved_reloc = FALSE; |
| } |
| ent = h->elf.got.glist; |
| } |
| else |
| { |
| if (local_got_ents == NULL) |
| abort (); |
| ent = local_got_ents[r_symndx]; |
| } |
| |
| for (; ent != NULL; ent = ent->next) |
| if (ent->addend == orig_addend |
| && ent->owner == input_bfd |
| && ent->tls_type == tls_type) |
| break; |
| if (ent == NULL) |
| abort (); |
| offp = &ent->got.offset; |
| } |
| |
| got = ppc64_elf_tdata (input_bfd)->got; |
| if (got == NULL) |
| abort (); |
| |
| /* The offset must always be a multiple of 8. We use the |
| least significant bit to record whether we have already |
| processed this entry. */ |
| off = *offp; |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| /* Generate relocs for the dynamic linker, except in |
| the case of TLSLD where we'll use one entry per |
| module. */ |
| asection *relgot = ppc64_elf_tdata (input_bfd)->relgot; |
| |
| *offp = off | 1; |
| if ((info->shared || indx != 0) |
| && (h == NULL |
| || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT |
| || h->elf.root.type != bfd_link_hash_undefweak)) |
| { |
| outrel.r_offset = (got->output_section->vma |
| + got->output_offset |
| + off); |
| outrel.r_addend = addend; |
| if (tls_type & (TLS_LD | TLS_GD)) |
| { |
| outrel.r_addend = 0; |
| outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64); |
| if (tls_type == (TLS_TLS | TLS_GD)) |
| { |
| loc = relgot->contents; |
| loc += (relgot->reloc_count++ |
| * sizeof (Elf64_External_Rela)); |
| bfd_elf64_swap_reloca_out (output_bfd, |
| &outrel, loc); |
| outrel.r_offset += 8; |
| outrel.r_addend = addend; |
| outrel.r_info |
| = ELF64_R_INFO (indx, R_PPC64_DTPREL64); |
| } |
| } |
| else if (tls_type == (TLS_TLS | TLS_DTPREL)) |
| outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64); |
| else if (tls_type == (TLS_TLS | TLS_TPREL)) |
| outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64); |
| else if (indx == 0) |
| { |
| outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE); |
| |
| /* Write the .got section contents for the sake |
| of prelink. */ |
| loc = got->contents + off; |
| bfd_put_64 (output_bfd, outrel.r_addend + relocation, |
| loc); |
| } |
| else |
| outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT); |
| |
| if (indx == 0 && tls_type != (TLS_TLS | TLS_LD)) |
| { |
| outrel.r_addend += relocation; |
| if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL)) |
| outrel.r_addend -= htab->elf.tls_sec->vma; |
| } |
| loc = relgot->contents; |
| loc += (relgot->reloc_count++ |
| * sizeof (Elf64_External_Rela)); |
| bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| } |
| |
| /* Init the .got section contents here if we're not |
| emitting a reloc. */ |
| else |
| { |
| relocation += addend; |
| if (tls_type == (TLS_TLS | TLS_LD)) |
| relocation = 1; |
| else if (tls_type != 0) |
| { |
| relocation -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| if (tls_type == (TLS_TLS | TLS_TPREL)) |
| relocation += DTP_OFFSET - TP_OFFSET; |
| |
| if (tls_type == (TLS_TLS | TLS_GD)) |
| { |
| bfd_put_64 (output_bfd, relocation, |
| got->contents + off + 8); |
| relocation = 1; |
| } |
| } |
| |
| bfd_put_64 (output_bfd, relocation, |
| got->contents + off); |
| } |
| } |
| |
| if (off >= (bfd_vma) -2) |
| abort (); |
| |
| relocation = got->output_offset + off; |
| |
| /* TOC base (r2) is TOC start plus 0x8000. */ |
| addend = -TOC_BASE_OFF; |
| } |
| break; |
| |
| case R_PPC64_PLT16_HA: |
| case R_PPC64_PLT16_HI: |
| case R_PPC64_PLT16_LO: |
| case R_PPC64_PLT32: |
| case R_PPC64_PLT64: |
| /* Relocation is to the entry for this symbol in the |
| procedure linkage table. */ |
| |
| /* Resolve a PLT reloc against a local symbol directly, |
| without using the procedure linkage table. */ |
| if (h == NULL) |
| break; |
| |
| /* It's possible that we didn't make a PLT entry for this |
| symbol. This happens when statically linking PIC code, |
| or when using -Bsymbolic. Go find a match if there is a |
| PLT entry. */ |
| if (htab->plt != NULL) |
| { |
| struct plt_entry *ent; |
| for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == orig_addend |
| && ent->plt.offset != (bfd_vma) -1) |
| { |
| relocation = (htab->plt->output_section->vma |
| + htab->plt->output_offset |
| + ent->plt.offset); |
| unresolved_reloc = FALSE; |
| } |
| } |
| break; |
| |
| case R_PPC64_TOC: |
| /* Relocation value is TOC base. */ |
| relocation = TOCstart; |
| if (r_symndx == 0) |
| relocation += htab->stub_group[input_section->id].toc_off; |
| else if (unresolved_reloc) |
| ; |
| else if (sec != NULL && sec->id <= htab->top_id) |
| relocation += htab->stub_group[sec->id].toc_off; |
| else |
| unresolved_reloc = TRUE; |
| goto dodyn; |
| |
| /* TOC16 relocs. We want the offset relative to the TOC base, |
| which is the address of the start of the TOC plus 0x8000. |
| The TOC consists of sections .got, .toc, .tocbss, and .plt, |
| in this order. */ |
| case R_PPC64_TOC16: |
| case R_PPC64_TOC16_LO: |
| case R_PPC64_TOC16_HI: |
| case R_PPC64_TOC16_DS: |
| case R_PPC64_TOC16_LO_DS: |
| case R_PPC64_TOC16_HA: |
| addend -= TOCstart + htab->stub_group[input_section->id].toc_off; |
| break; |
| |
| /* Relocate against the beginning of the section. */ |
| case R_PPC64_SECTOFF: |
| case R_PPC64_SECTOFF_LO: |
| case R_PPC64_SECTOFF_HI: |
| case R_PPC64_SECTOFF_DS: |
| case R_PPC64_SECTOFF_LO_DS: |
| case R_PPC64_SECTOFF_HA: |
| if (sec != NULL) |
| addend -= sec->output_section->vma; |
| break; |
| |
| case R_PPC64_REL14: |
| case R_PPC64_REL14_BRNTAKEN: |
| case R_PPC64_REL14_BRTAKEN: |
| case R_PPC64_REL24: |
| break; |
| |
| case R_PPC64_TPREL16: |
| case R_PPC64_TPREL16_LO: |
| case R_PPC64_TPREL16_HI: |
| case R_PPC64_TPREL16_HA: |
| case R_PPC64_TPREL16_DS: |
| case R_PPC64_TPREL16_LO_DS: |
| case R_PPC64_TPREL16_HIGHER: |
| case R_PPC64_TPREL16_HIGHERA: |
| case R_PPC64_TPREL16_HIGHEST: |
| case R_PPC64_TPREL16_HIGHESTA: |
| addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| if (info->shared) |
| /* The TPREL16 relocs shouldn't really be used in shared |
| libs as they will result in DT_TEXTREL being set, but |
| support them anyway. */ |
| goto dodyn; |
| break; |
| |
| case R_PPC64_DTPREL16: |
| case R_PPC64_DTPREL16_LO: |
| case R_PPC64_DTPREL16_HI: |
| case R_PPC64_DTPREL16_HA: |
| case R_PPC64_DTPREL16_DS: |
| case R_PPC64_DTPREL16_LO_DS: |
| case R_PPC64_DTPREL16_HIGHER: |
| case R_PPC64_DTPREL16_HIGHERA: |
| case R_PPC64_DTPREL16_HIGHEST: |
| case R_PPC64_DTPREL16_HIGHESTA: |
| addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| break; |
| |
| case R_PPC64_DTPMOD64: |
| relocation = 1; |
| addend = 0; |
| goto dodyn; |
| |
| case R_PPC64_TPREL64: |
| addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| goto dodyn; |
| |
| case R_PPC64_DTPREL64: |
| addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| /* Fall thru */ |
| |
| /* Relocations that may need to be propagated if this is a |
| dynamic object. */ |
| case R_PPC64_REL30: |
| case R_PPC64_REL32: |
| case R_PPC64_REL64: |
| case R_PPC64_ADDR14: |
| case R_PPC64_ADDR14_BRNTAKEN: |
| case R_PPC64_ADDR14_BRTAKEN: |
| case R_PPC64_ADDR16: |
| case R_PPC64_ADDR16_DS: |
| case R_PPC64_ADDR16_HA: |
| case R_PPC64_ADDR16_HI: |
| case R_PPC64_ADDR16_HIGHER: |
| case R_PPC64_ADDR16_HIGHERA: |
| case R_PPC64_ADDR16_HIGHEST: |
| case R_PPC64_ADDR16_HIGHESTA: |
| case R_PPC64_ADDR16_LO: |
| case R_PPC64_ADDR16_LO_DS: |
| case R_PPC64_ADDR24: |
| case R_PPC64_ADDR32: |
| case R_PPC64_ADDR64: |
| case R_PPC64_UADDR16: |
| case R_PPC64_UADDR32: |
| case R_PPC64_UADDR64: |
| dodyn: |
| if ((input_section->flags & SEC_ALLOC) == 0) |
| break; |
| |
| if (NO_OPD_RELOCS && is_opd) |
| break; |
| |
| if ((info->shared |
| && (h == NULL |
| || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT |
| || h->elf.root.type != bfd_link_hash_undefweak) |
| && (MUST_BE_DYN_RELOC (r_type) |
| || !SYMBOL_CALLS_LOCAL (info, &h->elf))) |
| || (ELIMINATE_COPY_RELOCS |
| && !info->shared |
| && h != NULL |
| && h->elf.dynindx != -1 |
| && !h->elf.non_got_ref |
| && h->elf.def_dynamic |
| && !h->elf.def_regular)) |
| { |
| Elf_Internal_Rela outrel; |
| bfd_boolean skip, relocate; |
| asection *sreloc; |
| bfd_byte *loc; |
| bfd_vma out_off; |
| |
| /* When generating a dynamic object, these relocations |
| are copied into the output file to be resolved at run |
| time. */ |
| |
| skip = FALSE; |
| relocate = FALSE; |
| |
| out_off = _bfd_elf_section_offset (output_bfd, info, |
| input_section, rel->r_offset); |
| if (out_off == (bfd_vma) -1) |
| skip = TRUE; |
| else if (out_off == (bfd_vma) -2) |
| skip = TRUE, relocate = TRUE; |
| out_off += (input_section->output_section->vma |
| + input_section->output_offset); |
| outrel.r_offset = out_off; |
| outrel.r_addend = rel->r_addend; |
| |
| /* Optimize unaligned reloc use. */ |
| if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0) |
| || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0)) |
| r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64; |
| else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0) |
| || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0)) |
| r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32; |
| else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0) |
| || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0)) |
| r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16; |
| |
| if (skip) |
| memset (&outrel, 0, sizeof outrel); |
| else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf) |
| && !is_opd |
| && r_type != R_PPC64_TOC) |
| outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type); |
| else |
| { |
| /* This symbol is local, or marked to become local, |
| or this is an opd section reloc which must point |
| at a local function. */ |
| outrel.r_addend += relocation; |
| if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) |
| { |
| if (is_opd && h != NULL) |
| { |
| /* Lie about opd entries. This case occurs |
| when building shared libraries and we |
| reference a function in another shared |
| lib. The same thing happens for a weak |
| definition in an application that's |
| overridden by a strong definition in a |
| shared lib. (I believe this is a generic |
| bug in binutils handling of weak syms.) |
| In these cases we won't use the opd |
| entry in this lib. */ |
| unresolved_reloc = FALSE; |
| } |
| outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| |
| /* We need to relocate .opd contents for ld.so. |
| Prelink also wants simple and consistent rules |
| for relocs. This make all RELATIVE relocs have |
| *r_offset equal to r_addend. */ |
| relocate = TRUE; |
| } |
| else |
| { |
| long indx = 0; |
| |
| if (bfd_is_abs_section (sec)) |
| ; |
| else if (sec == NULL || sec->owner == NULL) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| else |
| { |
| asection *osec; |
| |
| osec = sec->output_section; |
| indx = elf_section_data (osec)->dynindx; |
| |
| if (indx == 0) |
| { |
| if ((osec->flags & SEC_READONLY) == 0 |
| && htab->elf.data_index_section != NULL) |
| osec = htab->elf.data_index_section; |
| else |
| osec = htab->elf.text_index_section; |
| indx = elf_section_data (osec)->dynindx; |
| } |
| BFD_ASSERT (indx != 0); |
| |
| /* We are turning this relocation into one |
| against a section symbol, so subtract out |
| the output section's address but not the |
| offset of the input section in the output |
| section. */ |
| outrel.r_addend -= osec->vma; |
| } |
| |
| outrel.r_info = ELF64_R_INFO (indx, r_type); |
| } |
| } |
| |
| sreloc = elf_section_data (input_section)->sreloc; |
| if (sreloc == NULL) |
| abort (); |
| |
| if (sreloc->reloc_count * sizeof (Elf64_External_Rela) |
| >= sreloc->size) |
| abort (); |
| loc = sreloc->contents; |
| loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); |
| bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| |
| /* If this reloc is against an external symbol, it will |
| be computed at runtime, so there's no need to do |
| anything now. However, for the sake of prelink ensure |
| that the section contents are a known value. */ |
| if (! relocate) |
| { |
| unresolved_reloc = FALSE; |
| /* The value chosen here is quite arbitrary as ld.so |
| ignores section contents except for the special |
| case of .opd where the contents might be accessed |
| before relocation. Choose zero, as that won't |
| cause reloc overflow. */ |
| relocation = 0; |
| addend = 0; |
| /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs |
| to improve backward compatibility with older |
| versions of ld. */ |
| if (r_type == R_PPC64_ADDR64) |
| addend = outrel.r_addend; |
| /* Adjust pc_relative relocs to have zero in *r_offset. */ |
| else if (ppc64_elf_howto_table[r_type]->pc_relative) |
| addend = (input_section->output_section->vma |
| + input_section->output_offset |
| + rel->r_offset); |
| } |
| } |
| break; |
| |
| case R_PPC64_COPY: |
| case R_PPC64_GLOB_DAT: |
| case R_PPC64_JMP_SLOT: |
| case R_PPC64_RELATIVE: |
| /* We shouldn't ever see these dynamic relocs in relocatable |
| files. */ |
| /* Fall through. */ |
| |
| case R_PPC64_PLTGOT16: |
| case R_PPC64_PLTGOT16_DS: |
| case R_PPC64_PLTGOT16_HA: |
| case R_PPC64_PLTGOT16_HI: |
| case R_PPC64_PLTGOT16_LO: |
| case R_PPC64_PLTGOT16_LO_DS: |
| case R_PPC64_PLTREL32: |
| case R_PPC64_PLTREL64: |
| /* These ones haven't been implemented yet. */ |
| |
| (*_bfd_error_handler) |
| (_("%B: relocation %s is not supported for symbol %s."), |
| input_bfd, |
| ppc64_elf_howto_table[r_type]->name, sym_name); |
| |
| bfd_set_error (bfd_error_invalid_operation); |
| ret = FALSE; |
| continue; |
| } |
| |
| /* Do any further special processing. */ |
| switch (r_type) |
| { |
| default: |
| break; |
| |
| case R_PPC64_ADDR16_HA: |
| case R_PPC64_ADDR16_HIGHERA: |
| case R_PPC64_ADDR16_HIGHESTA: |
| case R_PPC64_TOC16_HA: |
| case R_PPC64_SECTOFF_HA: |
| case R_PPC64_TPREL16_HA: |
| case R_PPC64_DTPREL16_HA: |
| case R_PPC64_TPREL16_HIGHER: |
| case R_PPC64_TPREL16_HIGHERA: |
| case R_PPC64_TPREL16_HIGHEST: |
| case R_PPC64_TPREL16_HIGHESTA: |
| case R_PPC64_DTPREL16_HIGHER: |
| case R_PPC64_DTPREL16_HIGHERA: |
| case R_PPC64_DTPREL16_HIGHEST: |
| case R_PPC64_DTPREL16_HIGHESTA: |
| /* It's just possible that this symbol is a weak symbol |
| that's not actually defined anywhere. In that case, |
| 'sec' would be NULL, and we should leave the symbol |
| alone (it will be set to zero elsewhere in the link). */ |
| if (sec == NULL) |
| break; |
| /* Fall thru */ |
| |
| case R_PPC64_GOT16_HA: |
| case R_PPC64_PLTGOT16_HA: |
| case R_PPC64_PLT16_HA: |
| case R_PPC64_GOT_TLSGD16_HA: |
| case R_PPC64_GOT_TLSLD16_HA: |
| case R_PPC64_GOT_TPREL16_HA: |
| case R_PPC64_GOT_DTPREL16_HA: |
| /* Add 0x10000 if sign bit in 0:15 is set. |
| Bits 0:15 are not used. */ |
| addend += 0x8000; |
| break; |
| |
| case R_PPC64_ADDR16_DS: |
| case R_PPC64_ADDR16_LO_DS: |
| case R_PPC64_GOT16_DS: |
| case R_PPC64_GOT16_LO_DS: |
| case R_PPC64_PLT16_LO_DS: |
| case R_PPC64_SECTOFF_DS: |
| case R_PPC64_SECTOFF_LO_DS: |
| case R_PPC64_TOC16_DS: |
| case R_PPC64_TOC16_LO_DS: |
| case R_PPC64_PLTGOT16_DS: |
| case R_PPC64_PLTGOT16_LO_DS: |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| case R_PPC64_GOT_DTPREL16_DS: |
| case R_PPC64_GOT_DTPREL16_LO_DS: |
| case R_PPC64_TPREL16_DS: |
| case R_PPC64_TPREL16_LO_DS: |
| case R_PPC64_DTPREL16_DS: |
| case R_PPC64_DTPREL16_LO_DS: |
| insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
| mask = 3; |
| /* If this reloc is against an lq insn, then the value must be |
| a multiple of 16. This is somewhat of a hack, but the |
| "correct" way to do this by defining _DQ forms of all the |
| _DS relocs bloats all reloc switches in this file. It |
| doesn't seem to make much sense to use any of these relocs |
| in data, so testing the insn should be safe. */ |
| if ((insn & (0x3f << 26)) == (56u << 26)) |
| mask = 15; |
| if (((relocation + addend) & mask) != 0) |
| { |
| (*_bfd_error_handler) |
| (_("%B: error: relocation %s not a multiple of %d"), |
| input_bfd, |
| ppc64_elf_howto_table[r_type]->name, |
| mask + 1); |
| bfd_set_error (bfd_error_bad_value); |
| ret = FALSE; |
| continue; |
| } |
| break; |
| } |
| |
| /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| because such sections are not SEC_ALLOC and thus ld.so will |
| not process them. */ |
| if (unresolved_reloc |
| && !((input_section->flags & SEC_DEBUGGING) != 0 |
| && h->elf.def_dynamic)) |
| { |
| (*_bfd_error_handler) |
| (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| input_bfd, |
| input_section, |
| (long) rel->r_offset, |
| ppc64_elf_howto_table[(int) r_type]->name, |
| h->elf.root.root.string); |
| ret = FALSE; |
| } |
| |
| r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type], |
| input_bfd, |
| input_section, |
| contents, |
| rel->r_offset, |
| relocation, |
| addend); |
| |
| if (r != bfd_reloc_ok) |
| { |
| if (sym_name == NULL) |
| sym_name = "(null)"; |
| if (r == bfd_reloc_overflow) |
| { |
| if (warned) |
| continue; |
| if (h != NULL |
| && h->elf.root.type == bfd_link_hash_undefweak |
| && ppc64_elf_howto_table[r_type]->pc_relative) |
| { |
| /* Assume this is a call protected by other code that |
| detects the symbol is undefined. If this is the case, |
| we can safely ignore the overflow. If not, the |
| program is hosed anyway, and a little warning isn't |
| going to help. */ |
| |
| continue; |
| } |
| |
| if (!((*info->callbacks->reloc_overflow) |
| (info, (h ? &h->elf.root : NULL), sym_name, |
| ppc64_elf_howto_table[r_type]->name, |
| orig_addend, input_bfd, input_section, rel->r_offset))) |
| return FALSE; |
| } |
| else |
| { |
| (*_bfd_error_handler) |
| (_("%B(%A+0x%lx): %s reloc against `%s': error %d"), |
| input_bfd, |
| input_section, |
| (long) rel->r_offset, |
| ppc64_elf_howto_table[r_type]->name, |
| sym_name, |
| (int) r); |
| ret = FALSE; |
| } |
| } |
| } |
| |
| /* If we're emitting relocations, then shortly after this function |
| returns, reloc offsets and addends for this section will be |
| adjusted. Worse, reloc symbol indices will be for the output |
| file rather than the input. Save a copy of the relocs for |
| opd_entry_value. */ |
| if (is_opd && (info->emitrelocations || info->relocatable)) |
| { |
| bfd_size_type amt; |
| amt = input_section->reloc_count * sizeof (Elf_Internal_Rela); |
| rel = bfd_alloc (input_bfd, amt); |
| BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL); |
| ppc64_elf_tdata (input_bfd)->opd_relocs = rel; |
| if (rel == NULL) |
| return FALSE; |
| memcpy (rel, relocs, amt); |
| } |
| return ret; |
| } |
| |
| /* Adjust the value of any local symbols in opd sections. */ |
| |
| static bfd_boolean |
| ppc64_elf_output_symbol_hook (struct bfd_link_info *info, |
| const char *name ATTRIBUTE_UNUSED, |
| Elf_Internal_Sym *elfsym, |
| asection *input_sec, |
| struct elf_link_hash_entry *h) |
| { |
| long *opd_adjust, adjust; |
| bfd_vma value; |
| |
| if (h != NULL) |
| return TRUE; |
| |
| opd_adjust = get_opd_info (input_sec); |
| if (opd_adjust == NULL) |
| return TRUE; |
| |
| value = elfsym->st_value - input_sec->output_offset; |
| if (!info->relocatable) |
| value -= input_sec->output_section->vma; |
| |
| adjust = opd_adjust[value / 8]; |
| if (adjust == -1) |
| elfsym->st_value = 0; |
| else |
| elfsym->st_value += adjust; |
| return TRUE; |
| } |
| |
| /* Finish up dynamic symbol handling. We set the contents of various |
| dynamic sections here. */ |
| |
| static bfd_boolean |
| ppc64_elf_finish_dynamic_symbol (bfd *output_bfd, |
| struct bfd_link_info *info, |
| struct elf_link_hash_entry *h, |
| Elf_Internal_Sym *sym) |
| { |
| struct ppc_link_hash_table *htab; |
| struct plt_entry *ent; |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| |
| htab = ppc_hash_table (info); |
| |
| for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| if (ent->plt.offset != (bfd_vma) -1) |
| { |
| /* This symbol has an entry in the procedure linkage |
| table. Set it up. */ |
| |
| if (htab->plt == NULL |
| || htab->relplt == NULL |
| || htab->glink == NULL) |
| abort (); |
| |
| /* Create a JMP_SLOT reloc to inform the dynamic linker to |
| fill in the PLT entry. */ |
| rela.r_offset = (htab->plt->output_section->vma |
| + htab->plt->output_offset |
| + ent->plt.offset); |
| rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); |
| rela.r_addend = ent->addend; |
| |
| loc = htab->relplt->contents; |
| loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE |
| * sizeof (Elf64_External_Rela)); |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| |
| if (h->needs_copy) |
| { |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| |
| /* This symbol needs a copy reloc. Set it up. */ |
| |
| if (h->dynindx == -1 |
| || (h->root.type != bfd_link_hash_defined |
| && h->root.type != bfd_link_hash_defweak) |
| || htab->relbss == NULL) |
| abort (); |
| |
| rela.r_offset = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); |
| rela.r_addend = 0; |
| loc = htab->relbss->contents; |
| loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela); |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| |
| /* Mark some specially defined symbols as absolute. */ |
| if (strcmp (h->root.root.string, "_DYNAMIC") == 0) |
| sym->st_shndx = SHN_ABS; |
| |
| return TRUE; |
| } |
| |
| /* Used to decide how to sort relocs in an optimal manner for the |
| dynamic linker, before writing them out. */ |
| |
| static enum elf_reloc_type_class |
| ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| |
| r_type = ELF64_R_TYPE (rela->r_info); |
| switch (r_type) |
| { |
| case R_PPC64_RELATIVE: |
| return reloc_class_relative; |
| case R_PPC64_JMP_SLOT: |
| return reloc_class_plt; |
| case R_PPC64_COPY: |
| return reloc_class_copy; |
| default: |
| return reloc_class_normal; |
| } |
| } |
| |
| /* Finish up the dynamic sections. */ |
| |
| static bfd_boolean |
| ppc64_elf_finish_dynamic_sections (bfd *output_bfd, |
| struct bfd_link_info *info) |
| { |
| struct ppc_link_hash_table *htab; |
| bfd *dynobj; |
| asection *sdyn; |
| |
| htab = ppc_hash_table (info); |
| dynobj = htab->elf.dynobj; |
| sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| |
| if (htab->elf.dynamic_sections_created) |
| { |
| Elf64_External_Dyn *dyncon, *dynconend; |
| |
| if (sdyn == NULL || htab->got == NULL) |
| abort (); |
| |
| dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
| for (; dyncon < dynconend; dyncon++) |
| { |
| Elf_Internal_Dyn dyn; |
| asection *s; |
| |
| bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| |
| switch (dyn.d_tag) |
| { |
| default: |
| continue; |
| |
| case DT_PPC64_GLINK: |
| s = htab->glink; |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| /* We stupidly defined DT_PPC64_GLINK to be the start |
| of glink rather than the first entry point, which is |
| what ld.so needs, and now have a bigger stub to |
| support automatic multiple TOCs. */ |
| dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32; |
| break; |
| |
| case DT_PPC64_OPD: |
| s = bfd_get_section_by_name (output_bfd, ".opd"); |
| if (s == NULL) |
| continue; |
| dyn.d_un.d_ptr = s->vma; |
| break; |
| |
| case DT_PPC64_OPDSZ: |
| s = bfd_get_section_by_name (output_bfd, ".opd"); |
| if (s == NULL) |
| continue; |
| dyn.d_un.d_val = s->size; |
| break; |
| |
| case DT_PLTGOT: |
| s = htab->plt; |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| break; |
| |
| case DT_JMPREL: |
| s = htab->relplt; |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| break; |
| |
| case DT_PLTRELSZ: |
| dyn.d_un.d_val = htab->relplt->size; |
| break; |
| |
| case DT_RELASZ: |
| /* Don't count procedure linkage table relocs in the |
| overall reloc count. */ |
| s = htab->relplt; |
| if (s == NULL) |
| continue; |
| dyn.d_un.d_val -= s->size; |
| break; |
| |
| case DT_RELA: |
| /* We may not be using the standard ELF linker script. |
| If .rela.plt is the first .rela section, we adjust |
| DT_RELA to not include it. */ |
| s = htab->relplt; |
| if (s == NULL) |
| continue; |
| if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) |
| continue; |
| dyn.d_un.d_ptr += s->size; |
| break; |
| } |
| |
| bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| } |
| } |
| |
| if (htab->got != NULL && htab->got->size != 0) |
| { |
| /* Fill in the first entry in the global offset table. |
| We use it to hold the link-time TOCbase. */ |
| bfd_put_64 (output_bfd, |
| elf_gp (output_bfd) + TOC_BASE_OFF, |
| htab->got->contents); |
| |
| /* Set .got entry size. */ |
| elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8; |
| } |
| |
| if (htab->plt != NULL && htab->plt->size != 0) |
| { |
| /* Set .plt entry size. */ |
| elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize |
| = PLT_ENTRY_SIZE; |
| } |
| |
| /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for |
| brlt ourselves if emitrelocations. */ |
| if (htab->brlt != NULL |
| && htab->brlt->reloc_count != 0 |
| && !_bfd_elf_link_output_relocs (output_bfd, |
| htab->brlt, |
| &elf_section_data (htab->brlt)->rel_hdr, |
| elf_section_data (htab->brlt)->relocs, |
| NULL)) |
| return FALSE; |
| |
| /* We need to handle writing out multiple GOT sections ourselves, |
| since we didn't add them to DYNOBJ. We know dynobj is the first |
| bfd. */ |
| while ((dynobj = dynobj->link_next) != NULL) |
| { |
| asection *s; |
| |
| if (!is_ppc64_elf_target (dynobj->xvec)) |
| continue; |
| |
| s = ppc64_elf_tdata (dynobj)->got; |
| if (s != NULL |
| && s->size != 0 |
| && s->output_section != bfd_abs_section_ptr |
| && !bfd_set_section_contents (output_bfd, s->output_section, |
| s->contents, s->output_offset, |
| s->size)) |
| return FALSE; |
| s = ppc64_elf_tdata (dynobj)->relgot; |
| if (s != NULL |
| && s->size != 0 |
| && s->output_section != bfd_abs_section_ptr |
| && !bfd_set_section_contents (output_bfd, s->output_section, |
| s->contents, s->output_offset, |
| s->size)) |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| #include "elf64-target.h" |