| /* PowerPC64-specific support for 64-bit ELF. |
| Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
| Written by Linus Nordberg, Swox AB <info@swox.com>, |
| based on elf32-ppc.c by Ian Lance Taylor. |
| |
| 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| /* This file is based on the 64-bit PowerPC ELF ABI. It is also based |
| on the file elf32-ppc.c. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "bfdlink.h" |
| #include "libbfd.h" |
| #include "elf-bfd.h" |
| #include "elf/ppc.h" |
| #include "elf64-ppc.h" |
| |
| #define USE_RELA /* we want RELA relocations, not REL. */ |
| |
| |
| static void ppc_howto_init |
| PARAMS ((void)); |
| static reloc_howto_type *ppc64_elf_reloc_type_lookup |
| PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| static void ppc64_elf_info_to_howto |
| PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst)); |
| static bfd_reloc_status_type ppc64_elf_ha_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_brtaken_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_sectoff_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_toc_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_toc_ha_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_toc64_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_unhandled_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static boolean ppc64_elf_set_private_flags |
| PARAMS ((bfd *, flagword)); |
| static boolean ppc64_elf_merge_private_bfd_data |
| PARAMS ((bfd *, bfd *)); |
| static boolean ppc64_elf_section_from_shdr |
| PARAMS ((bfd *, Elf64_Internal_Shdr *, char *)); |
| |
| |
| /* Mask to set RA in memory instructions. */ |
| #define RA_REGISTER_MASK 0x001f0000 |
| |
| /* Value to shift register by to insert RA. */ |
| #define RA_REGISTER_SHIFT 16 |
| |
| /* 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) |
| |
| /* .plt call stub instructions. */ |
| #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 LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */ |
| #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */ |
| /* ld %r11,xxx+16@l(%r12) */ |
| #define BCTR 0x4e800420 /* bctr */ |
| |
| /* The normal stub is this size. */ |
| #define PLT_CALL_STUB_SIZE (7*4) |
| |
| /* But sometimes the .plt entry crosses a 64k boundary, and we need |
| to adjust the high word with this insn. */ |
| #define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */ |
| |
| /* The .glink fixup call stub is the same as the .plt call stub, but |
| the first instruction restores r2, and the std is omitted. */ |
| #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */ |
| |
| /* Always allow this much space. */ |
| #define GLINK_CALL_STUB_SIZE (8*4) |
| |
| /* 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 to save and restore floating point regs. */ |
| #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ |
| #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ |
| #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. FIXME: .opd should be trimmed |
| of unused values. */ |
| #ifndef NO_OPD_RELOCS |
| #define NO_OPD_RELOCS 0 |
| #endif |
| |
| /* Relocation HOWTO's. */ |
| static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_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_bitfield, /* 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 */ |
| 0x3fffffc, /* 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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR14", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* 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 */ |
| 0xfffc, /* 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 */ |
| 0xfffc, /* 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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_REL24", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x3fffffc, /* 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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_REL14", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* 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 */ |
| 0xfffc, /* 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 */ |
| 0xfffc, /* 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 */ |
| 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_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 */ |
| 0xffffffffffffffff, /* 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 */ |
| true, /* 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 */ |
| 0xffffffffffffffff, /* dst_mask */ |
| true), /* 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 */ |
| 0, /* 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 */ |
| 0, /* 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. Should have been named R_PPC64_REL30! */ |
| HOWTO (R_PPC64_ADDR30, /* 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_ADDR30", /* 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 */ |
| 0xffffffffffffffff, /* 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 */ |
| 0xffffffffffffffff, /* 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 */ |
| 0xffffffffffffffff, /* 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 */ |
| 0, /* 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 */ |
| 0, /* 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 */ |
| 0xffffffffffffffff, /* 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 */ |
| |
| /* 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 () |
| { |
| 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 (abfd, code) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| bfd_reloc_code_real_type code; |
| { |
| enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE; |
| |
| if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| /* Initialize howto table if needed. */ |
| ppc_howto_init (); |
| |
| switch ((int) code) |
| { |
| default: |
| return (reloc_howto_type *) NULL; |
| |
| case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE; |
| break; |
| case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32; |
| break; |
| case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24; |
| break; |
| case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16; |
| break; |
| case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO; |
| break; |
| case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI; |
| break; |
| case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA; |
| break; |
| case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14; |
| break; |
| case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN; |
| break; |
| case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN; |
| break; |
| case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24; |
| break; |
| case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14; |
| break; |
| case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN; |
| break; |
| case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN; |
| break; |
| case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16; |
| break; |
| case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO; |
| break; |
| case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI; |
| break; |
| case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA; |
| break; |
| case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY; |
| break; |
| case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT; |
| break; |
| case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32; |
| break; |
| case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32; |
| break; |
| case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32; |
| break; |
| case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO; |
| break; |
| case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI; |
| break; |
| case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA; |
| break; |
| case BFD_RELOC_16_BASEREL: ppc_reloc = R_PPC64_SECTOFF; |
| break; |
| case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO; |
| break; |
| case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI; |
| break; |
| case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA; |
| break; |
| case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR64; |
| break; |
| case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64; |
| break; |
| case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER; |
| break; |
| case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA; |
| break; |
| case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST; |
| break; |
| case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA; |
| break; |
| case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64; |
| break; |
| case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64; |
| break; |
| case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64; |
| break; |
| case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16; |
| break; |
| case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO; |
| break; |
| case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI; |
| break; |
| case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA; |
| break; |
| case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA; |
| break; |
| case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS; |
| break; |
| case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS; |
| break; |
| case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS; |
| break; |
| case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS; |
| break; |
| case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS; |
| break; |
| case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT; |
| break; |
| case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY; |
| break; |
| } |
| |
| return ppc64_elf_howto_table[(int) ppc_reloc]; |
| }; |
| |
| /* Set the howto pointer for a PowerPC ELF reloc. */ |
| |
| static void |
| ppc64_elf_info_to_howto (abfd, cache_ptr, dst) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| arelent *cache_ptr; |
| Elf64_Internal_Rela *dst; |
| { |
| unsigned int type; |
| |
| if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| /* Initialize howto table if needed. */ |
| ppc_howto_init (); |
| |
| type = ELF64_R_TYPE (dst->r_info); |
| BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) |
| / sizeof (ppc64_elf_howto_table[0]))); |
| cache_ptr->howto = ppc64_elf_howto_table[type]; |
| } |
| |
| /* Handle the R_PPC_ADDR16_HA and similar relocs. */ |
| |
| static bfd_reloc_status_type |
| ppc64_elf_ha_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR 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_brtaken_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message; |
| { |
| long insn; |
| enum elf_ppc_reloc_type r_type; |
| bfd_size_type octets; |
| /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ |
| 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 = (enum elf_ppc_reloc_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 |
| return bfd_reloc_continue; |
| } |
| 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, (bfd_vma) insn, (bfd_byte *) data + octets); |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_sectoff_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR 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 (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR 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 (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR 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 (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR 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 (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR 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 (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR 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; |
| } |
| |
| /* Function to set whether a module needs the -mrelocatable bit set. */ |
| |
| static boolean |
| ppc64_elf_set_private_flags (abfd, flags) |
| bfd *abfd; |
| flagword flags; |
| { |
| BFD_ASSERT (!elf_flags_init (abfd) |
| || elf_elfheader (abfd)->e_flags == flags); |
| |
| elf_elfheader (abfd)->e_flags = flags; |
| elf_flags_init (abfd) = true; |
| return true; |
| } |
| |
| /* Merge backend specific data from an object file to the output |
| object file when linking. */ |
| static boolean |
| ppc64_elf_merge_private_bfd_data (ibfd, obfd) |
| bfd *ibfd; |
| bfd *obfd; |
| { |
| flagword old_flags; |
| flagword new_flags; |
| boolean error; |
| |
| /* Check if we have the same endianess. */ |
| if (ibfd->xvec->byteorder != obfd->xvec->byteorder |
| && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) |
| { |
| const char *msg; |
| |
| if (bfd_big_endian (ibfd)) |
| msg = _("%s: compiled for a big endian system and target is little endian"); |
| else |
| msg = _("%s: compiled for a little endian system and target is big endian"); |
| |
| (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd)); |
| |
| bfd_set_error (bfd_error_wrong_format); |
| return false; |
| } |
| |
| if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| return true; |
| |
| new_flags = elf_elfheader (ibfd)->e_flags; |
| old_flags = elf_elfheader (obfd)->e_flags; |
| if (!elf_flags_init (obfd)) |
| { |
| /* First call, no flags set. */ |
| elf_flags_init (obfd) = true; |
| elf_elfheader (obfd)->e_flags = new_flags; |
| } |
| |
| else if (new_flags == old_flags) |
| /* Compatible flags are ok. */ |
| ; |
| |
| else |
| { |
| /* Incompatible flags. Warn about -mrelocatable mismatch. |
| Allow -mrelocatable-lib to be linked with either. */ |
| error = false; |
| if ((new_flags & EF_PPC_RELOCATABLE) != 0 |
| && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) |
| { |
| error = true; |
| (*_bfd_error_handler) |
| (_("%s: compiled with -mrelocatable and linked with modules compiled normally"), |
| bfd_archive_filename (ibfd)); |
| } |
| else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 |
| && (old_flags & EF_PPC_RELOCATABLE) != 0) |
| { |
| error = true; |
| (*_bfd_error_handler) |
| (_("%s: compiled normally and linked with modules compiled with -mrelocatable"), |
| bfd_archive_filename (ibfd)); |
| } |
| |
| /* The output is -mrelocatable-lib iff both the input files are. */ |
| if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) |
| elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; |
| |
| /* The output is -mrelocatable iff it can't be -mrelocatable-lib, |
| but each input file is either -mrelocatable or -mrelocatable-lib. */ |
| if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) |
| && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) |
| && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) |
| elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; |
| |
| /* Do not warn about eabi vs. V.4 mismatch, just or in the bit |
| if any module uses it. */ |
| elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); |
| |
| new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| |
| /* Warn about any other mismatches. */ |
| if (new_flags != old_flags) |
| { |
| error = true; |
| (*_bfd_error_handler) |
| (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), |
| bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags); |
| } |
| |
| if (error) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Handle a PowerPC specific section when reading an object file. This |
| is called when elfcode.h finds a section with an unknown type. */ |
| |
| static boolean |
| ppc64_elf_section_from_shdr (abfd, hdr, name) |
| bfd *abfd; |
| Elf64_Internal_Shdr *hdr; |
| char *name; |
| { |
| asection *newsect; |
| flagword flags; |
| |
| if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| return false; |
| |
| newsect = hdr->bfd_section; |
| flags = bfd_get_section_flags (abfd, newsect); |
| if (hdr->sh_flags & SHF_EXCLUDE) |
| flags |= SEC_EXCLUDE; |
| |
| if (hdr->sh_type == SHT_ORDERED) |
| flags |= SEC_SORT_ENTRIES; |
| |
| bfd_set_section_flags (abfd, newsect, flags); |
| return true; |
| } |
| |
| /* 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 optimised, 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. */ |
| |
| /* 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; |
| }; |
| |
| /* Of those relocs that might be copied as dynamic relocs, this macro |
| selects between relative and absolute types. */ |
| |
| #define IS_ABSOLUTE_RELOC(RTYPE) \ |
| ((RTYPE) != R_PPC64_REL32 \ |
| && (RTYPE) != R_PPC64_REL64 \ |
| && (RTYPE) != R_PPC64_ADDR30) |
| |
| /* 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@ha |
| . ld %r11,xxx@l(%r12) |
| . mtctr %r11 |
| . bctr |
| |
| ppc_stub_plt_call: |
| Used to call a function in a shared library. |
| . addis %r12,%r2,xxx@ha |
| . std %r2,40(%r1) |
| . ld %r11,xxx+0@l(%r12) |
| . ld %r2,xxx+8@l(%r12) |
| . mtctr %r11 |
| . ld %r11,xxx+16@l(%r12) |
| . bctr |
| */ |
| |
| enum ppc_stub_type { |
| ppc_stub_none, |
| ppc_stub_long_branch, |
| ppc_stub_plt_branch, |
| ppc_stub_plt_call |
| }; |
| |
| struct ppc_stub_hash_entry { |
| |
| /* Base hash table entry structure. */ |
| struct bfd_hash_entry root; |
| |
| /* 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; |
| |
| enum ppc_stub_type stub_type; |
| |
| /* The symbol table entry, if any, that this was derived from. */ |
| struct ppc_link_hash_entry *h; |
| |
| /* 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_lt. */ |
| unsigned int offset; |
| |
| /* Generation marker. */ |
| unsigned int iter; |
| }; |
| |
| struct ppc_link_hash_entry |
| { |
| struct elf_link_hash_entry elf; |
| |
| /* A pointer to the most recently used stub hash entry against this |
| symbol. */ |
| struct ppc_stub_hash_entry *stub_cache; |
| |
| /* Track dynamic relocs copied for this symbol. */ |
| struct ppc_dyn_relocs *dyn_relocs; |
| |
| /* Link between function code and descriptor symbols. */ |
| struct elf_link_hash_entry *oh; |
| |
| /* Flag function code and descriptor symbols. */ |
| unsigned int is_func:1; |
| unsigned int is_func_descriptor:1; |
| }; |
| |
| /* 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) PARAMS ((const char *, asection *)); |
| void (*layout_sections_again) PARAMS ((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; |
| } *stub_group; |
| |
| /* Assorted information used by ppc64_elf_size_stubs. */ |
| unsigned int bfd_count; |
| int top_index; |
| asection **input_list; |
| Elf_Internal_Sym **all_local_syms; |
| |
| /* Short-cuts to get to dynamic linker sections. */ |
| asection *sgot; |
| asection *srelgot; |
| asection *splt; |
| asection *srelplt; |
| asection *sdynbss; |
| asection *srelbss; |
| asection *sglink; |
| asection *sfpr; |
| asection *sbrlt; |
| asection *srelbrlt; |
| |
| /* Set on error. */ |
| unsigned int stub_error; |
| |
| /* Flag set when small branches are detected. Used to |
| select suitable defaults for the stub group size. */ |
| unsigned int has_14bit_branch; |
| |
| /* Set if we detect a reference undefined weak symbol. */ |
| unsigned int have_undefweak; |
| |
| /* Incremented every time we size stubs. */ |
| unsigned int stub_iteration; |
| |
| /* Small local sym to section mapping cache. */ |
| struct sym_sec_cache sym_sec; |
| }; |
| |
| static struct bfd_hash_entry *stub_hash_newfunc |
| PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| static struct bfd_hash_entry *branch_hash_newfunc |
| PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| static struct bfd_hash_entry *link_hash_newfunc |
| PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create |
| PARAMS ((bfd *)); |
| static void ppc64_elf_link_hash_table_free |
| PARAMS ((struct bfd_link_hash_table *)); |
| static char *ppc_stub_name |
| PARAMS ((const asection *, const asection *, |
| const struct ppc_link_hash_entry *, const Elf_Internal_Rela *)); |
| static struct ppc_stub_hash_entry *ppc_get_stub_entry |
| PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *, |
| const Elf_Internal_Rela *, struct ppc_link_hash_table *)); |
| static struct ppc_stub_hash_entry *ppc_add_stub |
| PARAMS ((const char *, asection *, struct ppc_link_hash_table *)); |
| static boolean create_linkage_sections |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static boolean create_got_section |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static boolean ppc64_elf_create_dynamic_sections |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static void ppc64_elf_copy_indirect_symbol |
| PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *)); |
| static boolean ppc64_elf_check_relocs |
| PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| const Elf_Internal_Rela *)); |
| static asection * ppc64_elf_gc_mark_hook |
| PARAMS ((bfd *abfd, struct bfd_link_info *info, Elf_Internal_Rela *rel, |
| struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)); |
| static boolean ppc64_elf_gc_sweep_hook |
| PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *sec, |
| const Elf_Internal_Rela *relocs)); |
| static boolean func_desc_adjust |
| PARAMS ((struct elf_link_hash_entry *, PTR)); |
| static boolean ppc64_elf_func_desc_adjust |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static boolean ppc64_elf_adjust_dynamic_symbol |
| PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| static void ppc64_elf_hide_symbol |
| PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean)); |
| static boolean allocate_dynrelocs |
| PARAMS ((struct elf_link_hash_entry *, PTR)); |
| static boolean readonly_dynrelocs |
| PARAMS ((struct elf_link_hash_entry *, PTR)); |
| static enum elf_reloc_type_class ppc64_elf_reloc_type_class |
| PARAMS ((const Elf_Internal_Rela *)); |
| static boolean ppc64_elf_size_dynamic_sections |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static INLINE enum ppc_stub_type ppc_type_of_stub |
| PARAMS ((asection *, const Elf_Internal_Rela *, |
| struct ppc_link_hash_entry **, bfd_vma)); |
| static bfd_byte *build_plt_stub |
| PARAMS ((bfd *, bfd_byte *, int, int)); |
| static boolean ppc_build_one_stub |
| PARAMS ((struct bfd_hash_entry *, PTR)); |
| static boolean ppc_size_one_stub |
| PARAMS ((struct bfd_hash_entry *, PTR)); |
| static void group_sections |
| PARAMS ((struct ppc_link_hash_table *, bfd_size_type, boolean)); |
| static boolean get_local_syms |
| PARAMS ((bfd *, struct ppc_link_hash_table *)); |
| static boolean ppc64_elf_fake_sections |
| PARAMS ((bfd *, Elf64_Internal_Shdr *, asection *)); |
| static boolean ppc64_elf_relocate_section |
| PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *, |
| Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms, |
| asection **)); |
| static boolean ppc64_elf_finish_dynamic_symbol |
| PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| Elf_Internal_Sym *)); |
| static boolean ppc64_elf_finish_dynamic_sections |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| |
| /* 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 (entry, table, string) |
| 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_sec = NULL; |
| eh->stub_offset = 0; |
| eh->target_value = 0; |
| eh->target_section = NULL; |
| eh->stub_type = ppc_stub_none; |
| 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 (entry, table, string) |
| 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 (entry, table, string) |
| 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; |
| |
| eh->stub_cache = NULL; |
| eh->dyn_relocs = NULL; |
| eh->oh = NULL; |
| eh->is_func = 0; |
| eh->is_func_descriptor = 0; |
| } |
| |
| return entry; |
| } |
| |
| /* Create a ppc64 ELF linker hash table. */ |
| |
| static struct bfd_link_hash_table * |
| ppc64_elf_link_hash_table_create (abfd) |
| bfd *abfd; |
| { |
| struct ppc_link_hash_table *htab; |
| bfd_size_type amt = sizeof (struct ppc_link_hash_table); |
| |
| htab = (struct ppc_link_hash_table *) bfd_malloc (amt); |
| if (htab == NULL) |
| return NULL; |
| |
| if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc)) |
| { |
| free (htab); |
| return NULL; |
| } |
| |
| /* Init the stub hash table too. */ |
| if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc)) |
| return NULL; |
| |
| /* And the branch hash table. */ |
| if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc)) |
| return NULL; |
| |
| htab->stub_bfd = NULL; |
| htab->add_stub_section = NULL; |
| htab->layout_sections_again = NULL; |
| htab->stub_group = NULL; |
| htab->sgot = NULL; |
| htab->srelgot = NULL; |
| htab->splt = NULL; |
| htab->srelplt = NULL; |
| htab->sdynbss = NULL; |
| htab->srelbss = NULL; |
| htab->sglink = NULL; |
| htab->sfpr = NULL; |
| htab->sbrlt = NULL; |
| htab->srelbrlt = NULL; |
| htab->stub_error = 0; |
| htab->has_14bit_branch = 0; |
| htab->have_undefweak = 0; |
| htab->stub_iteration = 0; |
| htab->sym_sec.abfd = NULL; |
| |
| return &htab->elf.root; |
| } |
| |
| /* Free the derived linker hash table. */ |
| |
| static void |
| ppc64_elf_link_hash_table_free (hash) |
| 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); |
| } |
| |
| /* Build a name for an entry in the stub hash table. */ |
| |
| static char * |
| ppc_stub_name (input_section, sym_sec, h, rel) |
| 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) |
| { |
| 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 + 16 + 1; |
| stub_name = bfd_malloc (len); |
| if (stub_name != NULL) |
| { |
| 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); |
| } |
| } |
| 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 (input_section, sym_sec, hash, rel, htab) |
| const asection *input_section; |
| const asection *sym_sec; |
| struct elf_link_hash_entry *hash; |
| const Elf_Internal_Rela *rel; |
| struct ppc_link_hash_table *htab; |
| { |
| struct ppc_stub_hash_entry *stub_entry; |
| struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash; |
| 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->stub_cache != NULL |
| && h->stub_cache->h == h |
| && h->stub_cache->id_sec == id_sec) |
| { |
| stub_entry = h->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->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 (stub_name, section, htab) |
| 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) |
| { |
| bfd_size_type len; |
| char *s_name; |
| |
| len = strlen (link_sec->name) + sizeof (STUB_SUFFIX); |
| s_name = bfd_alloc (htab->stub_bfd, len); |
| if (s_name == NULL) |
| return NULL; |
| |
| strcpy (s_name, link_sec->name); |
| strcpy (s_name + len - sizeof (STUB_SUFFIX), 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) (_("%s: cannot create stub entry %s"), |
| bfd_archive_filename (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 boolean |
| create_linkage_sections (dynobj, info) |
| 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 (dynobj, ".sfpr"); |
| if (htab->sfpr == NULL |
| || ! bfd_set_section_flags (dynobj, htab->sfpr, flags) |
| || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2)) |
| return false; |
| |
| /* Create .glink for lazy dynamic linking support. */ |
| htab->sglink = bfd_make_section_anyway (dynobj, ".glink"); |
| if (htab->sglink == NULL |
| || ! bfd_set_section_flags (dynobj, htab->sglink, flags) |
| || ! bfd_set_section_alignment (dynobj, htab->sglink, 2)) |
| return false; |
| |
| /* Create .branch_lt for plt_branch stubs. */ |
| flags = (SEC_ALLOC | SEC_LOAD |
| | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt"); |
| if (htab->sbrlt == NULL |
| || ! bfd_set_section_flags (dynobj, htab->sbrlt, flags) |
| || ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3)) |
| return false; |
| |
| if (info->shared) |
| { |
| flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
| | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| htab->srelbrlt = bfd_make_section (dynobj, ".rela.branch_lt"); |
| if (!htab->srelbrlt |
| || ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags) |
| || ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3)) |
| return false; |
| } |
| return true; |
| } |
| |
| /* Create .got and .rela.got sections in DYNOBJ, and set up |
| shortcuts to them in our hash table. */ |
| |
| static boolean |
| create_got_section (dynobj, info) |
| bfd *dynobj; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab; |
| |
| if (! _bfd_elf_create_got_section (dynobj, info)) |
| return false; |
| |
| htab = ppc_hash_table (info); |
| htab->sgot = bfd_get_section_by_name (dynobj, ".got"); |
| if (!htab->sgot) |
| abort (); |
| |
| htab->srelgot = bfd_make_section (dynobj, ".rela.got"); |
| if (!htab->srelgot |
| || ! bfd_set_section_flags (dynobj, htab->srelgot, |
| (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| | SEC_READONLY)) |
| || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
| return false; |
| return true; |
| } |
| |
| /* Create the dynamic sections, and set up shortcuts. */ |
| |
| static boolean |
| ppc64_elf_create_dynamic_sections (dynobj, info) |
| bfd *dynobj; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab; |
| |
| htab = ppc_hash_table (info); |
| if (!htab->sgot && !create_got_section (dynobj, info)) |
| return false; |
| |
| if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| return false; |
| |
| htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
| htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
| if (!info->shared) |
| htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| |
| if (!htab->splt || !htab->srelplt || !htab->sdynbss |
| || (!info->shared && !htab->srelbss)) |
| abort (); |
| |
| return true; |
| } |
| |
| /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| |
| static void |
| ppc64_elf_copy_indirect_symbol (dir, ind) |
| struct elf_link_hash_entry *dir, *ind; |
| { |
| struct ppc_link_hash_entry *edir, *eind; |
| |
| edir = (struct ppc_link_hash_entry *) dir; |
| eind = (struct ppc_link_hash_entry *) ind; |
| |
| if (eind->dyn_relocs != NULL) |
| { |
| if (edir->dyn_relocs != NULL) |
| { |
| struct ppc_dyn_relocs **pp; |
| struct ppc_dyn_relocs *p; |
| |
| if (ind->root.type == bfd_link_hash_indirect) |
| abort (); |
| |
| /* Add reloc counts against the weak sym to the strong 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; |
| |
| _bfd_elf_link_hash_copy_indirect (dir, ind); |
| } |
| |
| /* 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 boolean |
| ppc64_elf_check_relocs (abfd, info, sec, 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; |
| boolean is_opd; |
| |
| if (info->relocateable) |
| 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)); |
| if (!elf_bad_symtab (abfd)) |
| sym_hashes_end -= symtab_hdr->sh_info; |
| |
| sreloc = NULL; |
| is_opd = strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0; |
| |
| if (htab->elf.dynobj == NULL) |
| htab->elf.dynobj = abfd; |
| 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_ppc_reloc_type r_type; |
| |
| 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]; |
| |
| r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); |
| switch (r_type) |
| { |
| /* GOT16 relocations */ |
| 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. */ |
| if (htab->sgot == NULL |
| && !create_got_section (htab->elf.dynobj, info)) |
| return false; |
| |
| if (h != NULL) |
| { |
| h->got.refcount += 1; |
| } |
| else |
| { |
| bfd_signed_vma *local_got_refcounts; |
| |
| /* This is a global offset table entry for a local symbol. */ |
| local_got_refcounts = elf_local_got_refcounts (abfd); |
| if (local_got_refcounts == NULL) |
| { |
| bfd_size_type size; |
| |
| size = symtab_hdr->sh_info; |
| size *= sizeof (bfd_signed_vma); |
| local_got_refcounts = ((bfd_signed_vma *) |
| bfd_zalloc (abfd, size)); |
| if (local_got_refcounts == NULL) |
| return false; |
| elf_local_got_refcounts (abfd) = local_got_refcounts; |
| } |
| local_got_refcounts[r_symndx] += 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: |
| /* 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; |
| } |
| |
| h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| h->plt.refcount += 1; |
| ((struct ppc_link_hash_entry *) h)->is_func = 1; |
| 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_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; |
| |
| /* This relocation describes the C++ object vtable hierarchy. |
| Reconstruct it for later use during GC. */ |
| case R_PPC64_GNU_VTINHERIT: |
| if (!_bfd_elf64_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: |
| if (!_bfd_elf64_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: |
| htab->has_14bit_branch = 1; |
| /* Fall through. */ |
| |
| case R_PPC64_REL24: |
| if (h != NULL |
| && h->root.root.string[0] == '.' |
| && h->root.root.string[1] != 0) |
| { |
| /* We may need a .plt entry if the function this reloc |
| refers to is in a shared lib. */ |
| h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| h->plt.refcount += 1; |
| ((struct ppc_link_hash_entry *) h)->is_func = 1; |
| } |
| break; |
| |
| case R_PPC64_ADDR64: |
| if (is_opd |
| && h != NULL |
| && h->root.root.string[0] == '.' |
| && h->root.root.string[1] != 0) |
| { |
| struct elf_link_hash_entry *fdh; |
| |
| fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1, |
| false, false, false); |
| if (fdh != NULL) |
| { |
| /* Ensure the function descriptor symbol string is |
| part of the code symbol string. We aren't |
| changing the name here, just allowing some tricks |
| in ppc64_elf_hide_symbol. */ |
| fdh->root.root.string = h->root.root.string + 1; |
| ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1; |
| ((struct ppc_link_hash_entry *) fdh)->oh = h; |
| ((struct ppc_link_hash_entry *) h)->is_func = 1; |
| ((struct ppc_link_hash_entry *) h)->oh = fdh; |
| } |
| } |
| /* Fall through. */ |
| |
| case R_PPC64_REL64: |
| case R_PPC64_REL32: |
| 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_ADDR30: |
| case R_PPC64_ADDR32: |
| case R_PPC64_UADDR16: |
| case R_PPC64_UADDR32: |
| case R_PPC64_UADDR64: |
| case R_PPC64_TOC: |
| /* Don't propagate .opd relocs. */ |
| if (NO_OPD_RELOCS && is_opd) |
| 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 relocs_copied 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. */ |
| if ((info->shared |
| && (sec->flags & SEC_ALLOC) != 0 |
| && (IS_ABSOLUTE_RELOC (r_type) |
| || (h != NULL |
| && (! info->symbolic |
| || h->root.type == bfd_link_hash_defweak |
| || (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| || (!info->shared |
| && (sec->flags & SEC_ALLOC) != 0 |
| && h != NULL |
| && (h->root.type == bfd_link_hash_defweak |
| || (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0))) |
| { |
| 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 (strncmp (name, ".rela", 5) != 0 |
| || strcmp (bfd_get_section_name (abfd, sec), |
| name + 5) != 0) |
| { |
| (*_bfd_error_handler) |
| (_("%s: bad relocation section name `%s\'"), |
| bfd_archive_filename (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; |
| |
| sreloc = bfd_make_section (dynobj, name); |
| flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| if ((sec->flags & SEC_ALLOC) != 0) |
| flags |= SEC_ALLOC | SEC_LOAD; |
| if (sreloc == NULL |
| || ! bfd_set_section_flags (dynobj, sreloc, flags) |
| || ! 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; |
| s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
| sec, r_symndx); |
| if (s == NULL) |
| return false; |
| |
| head = ((struct ppc_dyn_relocs **) |
| &elf_section_data (s)->local_dynrel); |
| } |
| |
| p = *head; |
| if (p == NULL || p->sec != sec) |
| { |
| p = ((struct ppc_dyn_relocs *) |
| bfd_alloc (htab->elf.dynobj, |
| (bfd_size_type) 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 (!IS_ABSOLUTE_RELOC (r_type)) |
| p->pc_count += 1; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Return the section that should be marked against GC for a given |
| relocation. */ |
| |
| static asection * |
| ppc64_elf_gc_mark_hook (abfd, info, rel, h, sym) |
| bfd *abfd; |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| Elf_Internal_Rela *rel; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| { |
| if (h != NULL) |
| { |
| enum elf_ppc_reloc_type r_type; |
| |
| r_type = (enum elf_ppc_reloc_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: |
| return h->root.u.def.section; |
| |
| case bfd_link_hash_common: |
| return h->root.u.c.p->section; |
| |
| default: |
| break; |
| } |
| } |
| } |
| else |
| { |
| return bfd_section_from_elf_index (abfd, sym->st_shndx); |
| } |
| |
| return NULL; |
| } |
| |
| /* Update the .got, .plt. and dynamic reloc reference counts for the |
| section being removed. */ |
| |
| static boolean |
| ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs) |
| bfd *abfd; |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| asection *sec; |
| const Elf_Internal_Rela *relocs; |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| bfd_signed_vma *local_got_refcounts; |
| const Elf_Internal_Rela *rel, *relend; |
| |
| elf_section_data (sec)->local_dynrel = NULL; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| local_got_refcounts = elf_local_got_refcounts (abfd); |
| |
| relend = relocs + sec->reloc_count; |
| for (rel = relocs; rel < relend; rel++) |
| { |
| unsigned long r_symndx; |
| enum elf_ppc_reloc_type r_type; |
| struct elf_link_hash_entry *h; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); |
| switch (r_type) |
| { |
| 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: |
| if (r_symndx >= symtab_hdr->sh_info) |
| { |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| if (h->got.refcount > 0) |
| h->got.refcount--; |
| } |
| else |
| { |
| if (local_got_refcounts[r_symndx] > 0) |
| local_got_refcounts[r_symndx]--; |
| } |
| break; |
| |
| case R_PPC64_PLT16_HA: |
| case R_PPC64_PLT16_HI: |
| case R_PPC64_PLT16_LO: |
| case R_PPC64_PLT32: |
| case R_PPC64_PLT64: |
| if (r_symndx >= symtab_hdr->sh_info) |
| { |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| if (h->plt.refcount > 0) |
| h->plt.refcount--; |
| } |
| break; |
| |
| case R_PPC64_REL14: |
| case R_PPC64_REL14_BRNTAKEN: |
| case R_PPC64_REL14_BRTAKEN: |
| case R_PPC64_REL24: |
| if (r_symndx >= symtab_hdr->sh_info) |
| { |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| if (h->plt.refcount > 0) |
| h->plt.refcount--; |
| } |
| break; |
| |
| case R_PPC64_REL32: |
| case R_PPC64_REL64: |
| 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]; |
| eh = (struct ppc_link_hash_entry *) h; |
| |
| for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| if (p->sec == sec) |
| { |
| p->pc_count -= 1; |
| p->count -= 1; |
| if (p->count == 0) |
| *pp = p->next; |
| break; |
| } |
| } |
| break; |
| |
| 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_ADDR30: |
| case R_PPC64_ADDR32: |
| case R_PPC64_ADDR64: |
| case R_PPC64_UADDR16: |
| case R_PPC64_UADDR32: |
| case R_PPC64_UADDR64: |
| case R_PPC64_TOC: |
| 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]; |
| eh = (struct ppc_link_hash_entry *) h; |
| |
| for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| if (p->sec == sec) |
| { |
| p->count -= 1; |
| if (p->count == 0) |
| *pp = p->next; |
| break; |
| } |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| return true; |
| } |
| |
| /* Called via elf_link_hash_traverse to transfer dynamic linking |
| information on function code symbol entries to their corresponding |
| function descriptor symbol entries. */ |
| static boolean |
| func_desc_adjust (h, inf) |
| struct elf_link_hash_entry *h; |
| PTR inf; |
| { |
| struct bfd_link_info *info; |
| struct ppc_link_hash_table *htab; |
| |
| 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 this is a function code symbol, transfer dynamic linking |
| information to the function descriptor symbol. */ |
| if (!((struct ppc_link_hash_entry *) h)->is_func) |
| return true; |
| |
| if (h->root.type == bfd_link_hash_undefweak |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR)) |
| htab->have_undefweak = true; |
| |
| if (h->plt.refcount > 0 |
| && h->root.root.string[0] == '.' |
| && h->root.root.string[1] != '\0') |
| { |
| struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh; |
| boolean force_local; |
| |
| /* Find the corresponding function descriptor symbol. Create it |
| as undefined if necessary. */ |
| |
| if (fdh == NULL) |
| fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1, |
| false, false, true); |
| |
| if (fdh == NULL |
| && info->shared |
| && (h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak)) |
| { |
| bfd *abfd; |
| asymbol *newsym; |
| |
| abfd = h->root.u.undef.abfd; |
| newsym = bfd_make_empty_symbol (abfd); |
| newsym->name = h->root.root.string + 1; |
| newsym->section = bfd_und_section_ptr; |
| newsym->value = 0; |
| newsym->flags = BSF_OBJECT; |
| if (h->root.type == bfd_link_hash_undefweak) |
| newsym->flags |= BSF_WEAK; |
| |
| if ( !(_bfd_generic_link_add_one_symbol |
| (info, abfd, newsym->name, newsym->flags, |
| newsym->section, newsym->value, NULL, false, false, |
| (struct bfd_link_hash_entry **) &fdh))) |
| { |
| return false; |
| } |
| fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF; |
| } |
| |
| if (fdh != NULL |
| && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 |
| && (info->shared |
| || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)) |
| { |
| if (fdh->dynindx == -1) |
| if (! bfd_elf64_link_record_dynamic_symbol (info, fdh)) |
| return false; |
| fdh->elf_link_hash_flags |= (h->elf_link_hash_flags |
| & (ELF_LINK_HASH_REF_REGULAR |
| | ELF_LINK_HASH_REF_DYNAMIC |
| | ELF_LINK_HASH_REF_REGULAR_NONWEAK |
| | ELF_LINK_NON_GOT_REF)); |
| if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| { |
| fdh->plt.refcount = h->plt.refcount; |
| fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| } |
| ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1; |
| ((struct ppc_link_hash_entry *) fdh)->oh = h; |
| fdh->root.root.string = h->root.root.string + 1; |
| ((struct ppc_link_hash_entry *) h)->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 = ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
| && info->shared); |
| _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
| } |
| |
| return true; |
| } |
| |
| #define MIN_SAVE_FPR 14 |
| #define MAX_SAVE_FPR 31 |
| |
| /* 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 boolean |
| ppc64_elf_func_desc_adjust (obfd, info) |
| bfd *obfd ATTRIBUTE_UNUSED; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab; |
| unsigned int lowest_savef = MAX_SAVE_FPR + 2; |
| unsigned int lowest_restf = MAX_SAVE_FPR + 2; |
| unsigned int i; |
| struct elf_link_hash_entry *h; |
| bfd_byte *p; |
| char sym[10]; |
| |
| htab = ppc_hash_table (info); |
| |
| if (htab->sfpr == NULL) |
| /* We don't have any relocs. */ |
| return true; |
| |
| /* First provide any missing ._savef* and ._restf* functions. */ |
| memcpy (sym, "._savef14", 10); |
| for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) |
| { |
| sym[7] = i / 10 + '0'; |
| sym[8] = i % 10 + '0'; |
| h = elf_link_hash_lookup (&htab->elf, sym, false, false, true); |
| if (h != NULL |
| && h->root.type == bfd_link_hash_undefined) |
| { |
| if (lowest_savef > i) |
| lowest_savef = i; |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = htab->sfpr; |
| h->root.u.def.value = (i - lowest_savef) * 4; |
| h->type = STT_FUNC; |
| h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| _bfd_elf_link_hash_hide_symbol (info, h, info->shared); |
| } |
| } |
| |
| memcpy (sym, "._restf14", 10); |
| for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) |
| { |
| sym[7] = i / 10 + '0'; |
| sym[8] = i % 10 + '0'; |
| h = elf_link_hash_lookup (&htab->elf, sym, false, false, true); |
| if (h != NULL |
| && h->root.type == bfd_link_hash_undefined) |
| { |
| if (lowest_restf > i) |
| lowest_restf = i; |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = htab->sfpr; |
| h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 |
| + (i - lowest_restf) * 4); |
| h->type = STT_FUNC; |
| h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| _bfd_elf_link_hash_hide_symbol (info, h, info->shared); |
| } |
| } |
| |
| elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info); |
| |
| htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 |
| + (MAX_SAVE_FPR + 2 - lowest_restf) * 4); |
| |
| if (htab->sfpr->_raw_size == 0) |
| { |
| if (!htab->have_undefweak) |
| { |
| _bfd_strip_section_from_output (info, htab->sfpr); |
| return true; |
| } |
| |
| htab->sfpr->_raw_size = 4; |
| } |
| |
| p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size); |
| if (p == NULL) |
| return false; |
| htab->sfpr->contents = p; |
| |
| for (i = lowest_savef; i <= MAX_SAVE_FPR; i++) |
| { |
| unsigned int fpr = i << 21; |
| unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; |
| bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p); |
| p += 4; |
| } |
| if (lowest_savef <= MAX_SAVE_FPR) |
| { |
| bfd_put_32 (htab->elf.dynobj, BLR, p); |
| p += 4; |
| } |
| |
| for (i = lowest_restf; i <= MAX_SAVE_FPR; i++) |
| { |
| unsigned int fpr = i << 21; |
| unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; |
| bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p); |
| p += 4; |
| } |
| if (lowest_restf <= MAX_SAVE_FPR |
| || htab->sfpr->_raw_size == 4) |
| { |
| bfd_put_32 (htab->elf.dynobj, BLR, p); |
| } |
| |
| 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 boolean |
| ppc64_elf_adjust_dynamic_symbol (info, h) |
| struct bfd_link_info *info; |
| struct elf_link_hash_entry *h; |
| { |
| struct ppc_link_hash_table *htab; |
| struct ppc_link_hash_entry * eh; |
| struct ppc_dyn_relocs *p; |
| asection *s; |
| unsigned int power_of_two; |
| |
| htab = ppc_hash_table (info); |
| |
| /* Deal with function syms. */ |
| if (h->type == STT_FUNC |
| || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| { |
| /* Clear procedure linkage table information for any symbol that |
| won't need a .plt entry. */ |
| if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor |
| || h->plt.refcount <= 0 |
| || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 |
| || (! info->shared |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)) |
| { |
| h->plt.offset = (bfd_vma) -1; |
| h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| } |
| return true; |
| } |
| else |
| h->plt.offset = (bfd_vma) -1; |
| |
| /* 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->weakdef != NULL) |
| { |
| BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| || h->weakdef->root.type == bfd_link_hash_defweak); |
| h->root.u.def.section = h->weakdef->root.u.def.section; |
| h->root.u.def.value = h->weakdef->root.u.def.value; |
| return true; |
| } |
| |
| /* This is a reference to a symbol defined by a dynamic object which |
| is not a function. */ |
| |
| /* 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->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) |
| return true; |
| |
| 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->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; |
| 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_PPC_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->srelbss->_raw_size += sizeof (Elf64_External_Rela); |
| h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| } |
| |
| /* We need to figure out the alignment required for this symbol. I |
| have no idea how ELF linkers handle this. */ |
| power_of_two = bfd_log2 (h->size); |
| if (power_of_two > 4) |
| power_of_two = 4; |
| |
| /* Apply the required alignment. */ |
| s = htab->sdynbss; |
| s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); |
| if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
| { |
| if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
| return false; |
| } |
| |
| /* Define the symbol as being at this point in the section. */ |
| h->root.u.def.section = s; |
| h->root.u.def.value = s->_raw_size; |
| |
| /* Increment the section size to make room for the symbol. */ |
| s->_raw_size += h->size; |
| |
| return true; |
| } |
| |
| /* If given a function descriptor symbol, hide both the function code |
| sym and the descriptor. */ |
| static void |
| ppc64_elf_hide_symbol (info, h, force_local) |
| struct bfd_link_info *info; |
| struct elf_link_hash_entry *h; |
| boolean force_local; |
| { |
| _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
| |
| if (((struct ppc_link_hash_entry *) h)->is_func_descriptor) |
| { |
| const char *name; |
| struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh; |
| struct ppc_link_hash_table *htab; |
| |
| name = h->root.root.string - 1; |
| htab = ppc_hash_table (info); |
| if (fh == NULL) |
| fh = elf_link_hash_lookup (&htab->elf, name, false, false, false); |
| if (fh != NULL) |
| _bfd_elf_link_hash_hide_symbol (info, fh, force_local); |
| } |
| } |
| |
| /* This is the condition under which ppc64_elf_finish_dynamic_symbol |
| will be called from elflink.h. If elflink.h doesn't call our |
| finish_dynamic_symbol routine, we'll need to do something about |
| initializing any .plt and .got entries in ppc64_elf_relocate_section. */ |
| #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ |
| ((DYN) \ |
| && ((INFO)->shared \ |
| || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ |
| && ((H)->dynindx != -1 \ |
| || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) |
| |
| /* Allocate space in .plt, .got and associated reloc sections for |
| dynamic relocs. */ |
| |
| static boolean |
| allocate_dynrelocs (h, inf) |
| struct elf_link_hash_entry *h; |
| PTR 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; |
| |
| 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->plt.refcount > 0 |
| && h->dynindx != -1) |
| { |
| BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor); |
| |
| if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) |
| { |
| /* If this is the first .plt entry, make room for the special |
| first entry. */ |
| s = htab->splt; |
| if (s->_raw_size == 0) |
| s->_raw_size += PLT_INITIAL_ENTRY_SIZE; |
| |
| h->plt.offset = s->_raw_size; |
| |
| /* Make room for this entry. */ |
| s->_raw_size += PLT_ENTRY_SIZE; |
| |
| /* Make room for the .glink code. */ |
| s = htab->sglink; |
| if (s->_raw_size == 0) |
| s->_raw_size += GLINK_CALL_STUB_SIZE; |
| /* We need bigger stubs past index 32767. */ |
| if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4) |
| s->_raw_size += 4; |
| s->_raw_size += 2*4; |
| |
| /* We also need to make an entry in the .rela.plt section. */ |
| s = htab->srelplt; |
| s->_raw_size += sizeof (Elf64_External_Rela); |
| } |
| else |
| { |
| h->plt.offset = (bfd_vma) -1; |
| h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| } |
| } |
| else |
| { |
| h->plt.offset = (bfd_vma) -1; |
| h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| } |
| |
| if (h->got.refcount > 0) |
| { |
| boolean dyn; |
| |
| /* 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->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| { |
| if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| return false; |
| } |
| |
| s = htab->sgot; |
| h->got.offset = s->_raw_size; |
| s->_raw_size += 8; |
| dyn = htab->elf.dynamic_sections_created; |
| if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) |
| htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); |
| } |
| else |
| h->got.offset = (bfd_vma) -1; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| 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) |
| { |
| if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
| && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 |
| || info->symbolic)) |
| { |
| 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; |
| } |
| } |
| } |
| else |
| { |
| /* For the non-shared case, discard space for relocs against |
| symbols which turn out to need copy relocs or are not |
| dynamic. */ |
| |
| if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| || (htab->elf.dynamic_sections_created |
| && (h->root.type == bfd_link_hash_undefweak |
| || h->root.type == bfd_link_hash_undefined)))) |
| { |
| /* 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->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| { |
| if (! bfd_elf64_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->_raw_size += p->count * sizeof (Elf64_External_Rela); |
| } |
| |
| return true; |
| } |
| |
| /* Find any dynamic relocs that apply to read-only sections. */ |
| |
| static boolean |
| readonly_dynrelocs (h, inf) |
| struct elf_link_hash_entry *h; |
| PTR 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 = (struct bfd_link_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 boolean |
| ppc64_elf_size_dynamic_sections (output_bfd, info) |
| bfd *output_bfd ATTRIBUTE_UNUSED; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab; |
| bfd *dynobj; |
| asection *s; |
| 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->shared) |
| { |
| s = bfd_get_section_by_name (dynobj, ".interp"); |
| if (s == NULL) |
| abort (); |
| s->_raw_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) |
| { |
| bfd_signed_vma *local_got; |
| bfd_signed_vma *end_local_got; |
| bfd_size_type locsymcount; |
| Elf_Internal_Shdr *symtab_hdr; |
| asection *srel; |
| |
| if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| continue; |
| |
| for (s = ibfd->sections; s != NULL; s = s->next) |
| { |
| struct ppc_dyn_relocs *p; |
| |
| for (p = *((struct ppc_dyn_relocs **) |
| &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->_raw_size += p->count * sizeof (Elf64_External_Rela); |
| if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| info->flags |= DF_TEXTREL; |
| } |
| } |
| } |
| |
| local_got = elf_local_got_refcounts (ibfd); |
| if (!local_got) |
| continue; |
| |
| symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| locsymcount = symtab_hdr->sh_info; |
| end_local_got = local_got + locsymcount; |
| s = htab->sgot; |
| srel = htab->srelgot; |
| for (; local_got < end_local_got; ++local_got) |
| { |
| if (*local_got > 0) |
| { |
| *local_got = s->_raw_size; |
| s->_raw_size += 8; |
| if (info->shared) |
| srel->_raw_size += sizeof (Elf64_External_Rela); |
| } |
| else |
| *local_got = (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, (PTR) 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->sbrlt || s == htab->srelbrlt) |
| /* These haven't been allocated yet; don't strip. */ |
| continue; |
| else if (s == htab->splt |
| || s == htab->sgot |
| || s == htab->sglink) |
| { |
| /* Strip this section if we don't need it; see the |
| comment below. */ |
| } |
| else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
| { |
| if (s->_raw_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. */ |
| } |
| else |
| { |
| if (s != htab->srelplt) |
| 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->_raw_size == 0) |
| { |
| _bfd_strip_section_from_output (info, s); |
| 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 instead |
| of garbage. */ |
| s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| if (s->contents == NULL) |
| return false; |
| } |
| |
| 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_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) |
| |
| if (!info->shared) |
| { |
| if (!add_dynamic_entry (DT_DEBUG, 0)) |
| return false; |
| } |
| |
| if (htab->splt->_raw_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, |
| (PTR) 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 (input_sec, rel, hash, destination) |
| 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; |
| unsigned int r_type; |
| |
| if (h != NULL) |
| { |
| if (h->oh != NULL |
| && h->oh->plt.offset != (bfd_vma) -1 |
| && h->oh->dynindx != -1) |
| { |
| *hash = (struct ppc_link_hash_entry *) h->oh; |
| return ppc_stub_plt_call; |
| } |
| |
| if (h->elf.root.type == bfd_link_hash_undefweak |
| || h->elf.root.type == bfd_link_hash_undefined) |
| 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 != (unsigned int) 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 bfd_byte * |
| build_plt_stub (obfd, p, offset, glink) |
| bfd *obfd; |
| bfd_byte *p; |
| int offset; |
| int glink; |
| { |
| #define PPC_LO(v) ((v) & 0xffff) |
| #define PPC_HI(v) (((v) >> 16) & 0xffff) |
| #define PPC_HA(v) PPC_HI ((v) + 0x8000) |
| |
| if (glink) |
| bfd_put_32 (obfd, LD_R2_40R1, p), p += 4; |
| bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; |
| if (!glink) |
| 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 + 8) != PPC_HA (offset)) |
| bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4; |
| offset += 8; |
| bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4; |
| if (PPC_HA (offset + 8) != PPC_HA (offset)) |
| bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4; |
| offset += 8; |
| bfd_put_32 (obfd, MTCTR_R11, p), p += 4; |
| bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; |
| bfd_put_32 (obfd, BCTR, p), p += 4; |
| return p; |
| } |
| |
| static boolean |
| ppc_build_one_stub (gen_entry, in_arg) |
| struct bfd_hash_entry *gen_entry; |
| PTR 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; |
| asection *stub_sec; |
| bfd *stub_bfd; |
| bfd_byte *loc; |
| bfd_byte *p; |
| unsigned int indx; |
| bfd_vma off; |
| int size; |
| |
| /* Massage our args to the form they really have. */ |
| stub_entry = (struct ppc_stub_hash_entry *) gen_entry; |
| info = (struct bfd_link_info *) in_arg; |
| |
| htab = ppc_hash_table (info); |
| stub_sec = stub_entry->stub_sec; |
| |
| /* Make a note of the offset within the stubs for this entry. */ |
| stub_entry->stub_offset = stub_sec->_cooked_size; |
| loc = stub_sec->contents + stub_entry->stub_offset; |
| |
| stub_bfd = stub_sec->owner; |
| |
| switch (stub_entry->stub_type) |
| { |
| case ppc_stub_long_branch: |
| /* Branches are relative. This is where we are going to. */ |
| off = (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_sec->output_offset |
| + stub_sec->output_section->vma); |
| |
| BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26)); |
| |
| bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc); |
| size = 4; |
| break; |
| |
| case ppc_stub_plt_branch: |
| 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 + 9); |
| 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->sbrlt->owner, off, |
| htab->sbrlt->contents + br_entry->offset); |
| |
| if (info->shared) |
| { |
| /* Create a reloc for the branch lookup table entry. */ |
| Elf_Internal_Rela rela; |
| Elf64_External_Rela *r; |
| |
| rela.r_offset = (br_entry->offset |
| + htab->sbrlt->output_offset |
| + htab->sbrlt->output_section->vma); |
| rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| rela.r_addend = off; |
| |
| r = (Elf64_External_Rela *) htab->srelbrlt->contents; |
| r += htab->srelbrlt->reloc_count++; |
| bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, r); |
| } |
| |
| off = (br_entry->offset |
| + htab->sbrlt->output_offset |
| + htab->sbrlt->output_section->vma |
| - elf_gp (htab->sbrlt->output_section->owner) |
| - TOC_BASE_OFF); |
| |
| if (off + 0x80000000 > 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; |
| bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc); |
| bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc + 4); |
| bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc + 8); |
| bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc + 12); |
| size = 16; |
| break; |
| |
| case ppc_stub_plt_call: |
| /* Build the .glink lazy link call stub. */ |
| p = htab->sglink->contents + htab->sglink->_cooked_size; |
| indx = htab->sglink->reloc_count; |
| if (indx < 0x8000) |
| { |
| bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p); |
| p += 4; |
| } |
| else |
| { |
| bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p); |
| p += 4; |
| } |
| bfd_put_32 (htab->sglink->owner, |
| B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p); |
| p += 4; |
| htab->sglink->_cooked_size = p - htab->sglink->contents; |
| htab->sglink->reloc_count += 1; |
| |
| /* Now build the stub. */ |
| off = stub_entry->h->elf.plt.offset; |
| if (off >= (bfd_vma) -2) |
| abort (); |
| |
| off &= ~ (bfd_vma) 1; |
| off += (htab->splt->output_offset |
| + htab->splt->output_section->vma |
| - elf_gp (htab->splt->output_section->owner) |
| - TOC_BASE_OFF); |
| |
| if (off + 0x80000000 > 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 (stub_bfd, loc, (int) off, 0); |
| size = p - loc; |
| break; |
| |
| default: |
| BFD_FAIL (); |
| return false; |
| } |
| |
| stub_sec->_cooked_size += size; |
| 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 boolean |
| ppc_size_one_stub (gen_entry, in_arg) |
| struct bfd_hash_entry *gen_entry; |
| PTR in_arg; |
| { |
| struct ppc_stub_hash_entry *stub_entry; |
| 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; |
| htab = (struct ppc_link_hash_table *) in_arg; |
| |
| if (stub_entry->stub_type == ppc_stub_plt_call) |
| { |
| off = stub_entry->h->elf.plt.offset & ~(bfd_vma) 1; |
| off += (htab->splt->output_offset |
| + htab->splt->output_section->vma |
| - elf_gp (htab->splt->output_section->owner) |
| - TOC_BASE_OFF); |
| |
| size = 28; |
| if (PPC_HA ((int) off + 16) != PPC_HA ((int) off)) |
| size += 4; |
| } |
| else |
| { |
| /* ppc_stub_long_branch or ppc_stub_plt_branch. */ |
| stub_entry->stub_type = ppc_stub_long_branch; |
| size = 4; |
| |
| off = (stub_entry->target_value |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_section->output_section->vma); |
| off -= (stub_entry->stub_sec->_raw_size |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_sec->output_section->vma); |
| |
| if (off + (1 << 25) >= (bfd_vma) (1 << 26)) |
| { |
| struct ppc_branch_hash_entry *br_entry; |
| |
| 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 + 9); |
| htab->stub_error = true; |
| return false; |
| } |
| |
| if (br_entry->iter != htab->stub_iteration) |
| { |
| br_entry->iter = htab->stub_iteration; |
| br_entry->offset = htab->sbrlt->_raw_size; |
| htab->sbrlt->_raw_size += 8; |
| } |
| stub_entry->stub_type = ppc_stub_plt_branch; |
| size = 16; |
| } |
| } |
| |
| stub_entry->stub_sec->_raw_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 (output_bfd, info) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| { |
| bfd *input_bfd; |
| unsigned int bfd_count; |
| int top_id, top_index; |
| asection *section; |
| asection **input_list, **list; |
| bfd_size_type amt; |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| if (htab->elf.root.creator->flavour != bfd_target_elf_flavour |
| || htab->sbrlt == NULL) |
| return 0; |
| |
| /* Count the number of input BFDs and find the top input section id. */ |
| for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| input_bfd != NULL; |
| input_bfd = input_bfd->link_next) |
| { |
| bfd_count += 1; |
| for (section = input_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| if (top_id < section->id) |
| top_id = section->id; |
| } |
| } |
| htab->bfd_count = bfd_count; |
| |
| amt = sizeof (struct map_stub) * (top_id + 1); |
| htab->stub_group = (struct map_stub *) bfd_zmalloc (amt); |
| if (htab->stub_group == NULL) |
| return -1; |
| |
| /* We can't use output_bfd->section_count here to find the top output |
| section index as some sections may have been removed, and |
| _bfd_strip_section_from_output 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 = (asection **) bfd_malloc (amt); |
| htab->input_list = input_list; |
| if (input_list == NULL) |
| return -1; |
| |
| /* For sections we aren't interested in, mark their entries with a |
| value we can check later. */ |
| list = input_list + top_index; |
| do |
| *list = bfd_abs_section_ptr; |
| while (list-- != input_list); |
| |
| for (section = output_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| if ((section->flags & SEC_CODE) != 0) |
| input_list[section->index] = NULL; |
| } |
| |
| return 1; |
| } |
| |
| /* 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. */ |
| |
| void |
| ppc64_elf_next_input_section (info, isec) |
| struct bfd_link_info *info; |
| asection *isec; |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| if (isec->output_section->index <= htab->top_index) |
| { |
| asection **list = htab->input_list + isec->output_section->index; |
| if (*list != bfd_abs_section_ptr) |
| { |
| /* 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; |
| } |
| } |
| } |
| |
| /* 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 (htab, stub_group_size, stubs_always_before_branch) |
| struct ppc_link_hash_table *htab; |
| bfd_size_type stub_group_size; |
| boolean stubs_always_before_branch; |
| { |
| asection **list = htab->input_list + htab->top_index; |
| do |
| { |
| asection *tail = *list; |
| if (tail == bfd_abs_section_ptr) |
| continue; |
| while (tail != NULL) |
| { |
| asection *curr; |
| asection *prev; |
| bfd_size_type total; |
| |
| curr = tail; |
| if (tail->_cooked_size) |
| total = tail->_cooked_size; |
| else |
| total = tail->_raw_size; |
| while ((prev = PREV_SEC (curr)) != NULL |
| && ((total += curr->output_offset - prev->output_offset) |
| < stub_group_size)) |
| 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 2834432 bytes, or over 100000 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. */ |
| if (!stubs_always_before_branch) |
| { |
| total = 0; |
| while (prev != NULL |
| && ((total += tail->output_offset - prev->output_offset) |
| < stub_group_size)) |
| { |
| 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 |
| } |
| |
| /* Read in all local syms for all input bfds. */ |
| |
| static boolean |
| get_local_syms (input_bfd, htab) |
| bfd *input_bfd; |
| struct ppc_link_hash_table *htab; |
| { |
| unsigned int bfd_indx; |
| Elf_Internal_Sym *local_syms, **all_local_syms; |
| |
| /* We want to read in symbol extension records only once. To do this |
| we need to read in the local symbols in parallel and save them for |
| later use; so hold pointers to the local symbols in an array. */ |
| bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; |
| all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt); |
| htab->all_local_syms = all_local_syms; |
| if (all_local_syms == NULL) |
| return false; |
| |
| /* Walk over all the input BFDs, swapping in local symbols. |
| If we are creating a shared library, create hash entries for the |
| export stubs. */ |
| for (bfd_indx = 0; |
| input_bfd != NULL; |
| input_bfd = input_bfd->link_next, bfd_indx++) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf_Internal_Shdr *shndx_hdr; |
| Elf_Internal_Sym *isym; |
| Elf64_External_Sym *ext_syms, *esym, *end_sy; |
| Elf_External_Sym_Shndx *shndx_buf, *shndx; |
| bfd_size_type sec_size; |
| |
| /* We'll need the symbol table in a second. */ |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| if (symtab_hdr->sh_info == 0) |
| continue; |
| |
| /* We need an array of the local symbols attached to the input bfd. |
| Unfortunately, we're going to have to read & swap them in. */ |
| sec_size = symtab_hdr->sh_info; |
| sec_size *= sizeof (Elf_Internal_Sym); |
| local_syms = (Elf_Internal_Sym *) bfd_malloc (sec_size); |
| if (local_syms == NULL) |
| return false; |
| |
| all_local_syms[bfd_indx] = local_syms; |
| sec_size = symtab_hdr->sh_info; |
| sec_size *= sizeof (Elf64_External_Sym); |
| ext_syms = (Elf64_External_Sym *) bfd_malloc (sec_size); |
| if (ext_syms == NULL) |
| return false; |
| |
| if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 |
| || bfd_bread ((PTR) ext_syms, sec_size, input_bfd) != sec_size) |
| { |
| error_ret_free_ext_syms: |
| free (ext_syms); |
| return false; |
| } |
| |
| shndx_buf = NULL; |
| shndx_hdr = &elf_tdata (input_bfd)->symtab_shndx_hdr; |
| if (shndx_hdr->sh_size != 0) |
| { |
| sec_size = symtab_hdr->sh_info; |
| sec_size *= sizeof (Elf_External_Sym_Shndx); |
| shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (sec_size); |
| if (shndx_buf == NULL) |
| goto error_ret_free_ext_syms; |
| |
| if (bfd_seek (input_bfd, shndx_hdr->sh_offset, SEEK_SET) != 0 |
| || bfd_bread ((PTR) shndx_buf, sec_size, input_bfd) != sec_size) |
| { |
| free (shndx_buf); |
| goto error_ret_free_ext_syms; |
| } |
| } |
| |
| /* Swap the local symbols in. */ |
| for (esym = ext_syms, end_sy = esym + symtab_hdr->sh_info, |
| isym = local_syms, shndx = shndx_buf; |
| esym < end_sy; |
| esym++, isym++, shndx = (shndx ? shndx + 1 : NULL)) |
| bfd_elf64_swap_symbol_in (input_bfd, esym, shndx, isym); |
| |
| /* Now we can free the external symbols. */ |
| free (shndx_buf); |
| free (ext_syms); |
| } |
| |
| return true; |
| } |
| |
| /* 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. */ |
| |
| boolean |
| ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size, |
| add_stub_section, layout_sections_again) |
| bfd *output_bfd; |
| bfd *stub_bfd; |
| struct bfd_link_info *info; |
| bfd_signed_vma group_size; |
| asection * (*add_stub_section) PARAMS ((const char *, asection *)); |
| void (*layout_sections_again) PARAMS ((void)); |
| { |
| bfd_size_type stub_group_size; |
| boolean stubs_always_before_branch; |
| boolean ret = false; |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| /* Stash our params away. */ |
| htab->stub_bfd = stub_bfd; |
| 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; |
| if (stub_group_size == 1) |
| { |
| /* Default values. */ |
| stub_group_size = 30720000; |
| if (htab->has_14bit_branch) |
| stub_group_size = 30000; |
| } |
| |
| group_sections (htab, stub_group_size, stubs_always_before_branch); |
| |
| if (! get_local_syms (info->input_bfds, htab)) |
| { |
| if (htab->all_local_syms) |
| goto error_ret_free_local; |
| return false; |
| } |
| |
| while (1) |
| { |
| bfd *input_bfd; |
| unsigned int bfd_indx; |
| asection *stub_sec; |
| boolean stub_changed; |
| |
| htab->stub_iteration += 1; |
| stub_changed = false; |
| |
| 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; |
| |
| /* We'll need the symbol table in a second. */ |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| if (symtab_hdr->sh_info == 0) |
| continue; |
| |
| local_syms = htab->all_local_syms[bfd_indx]; |
| |
| /* Walk over each section attached to the input bfd. */ |
| for (section = input_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| Elf_Internal_Shdr *input_rel_hdr; |
| Elf64_External_Rela *external_relocs, *erelaend, *erela; |
| Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| bfd_size_type amt; |
| |
| /* If there aren't any relocs, then there's nothing more |
| to do. */ |
| if ((section->flags & SEC_RELOC) == 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; |
| |
| /* Allocate space for the external relocations. */ |
| amt = section->reloc_count; |
| amt *= sizeof (Elf64_External_Rela); |
| external_relocs = (Elf64_External_Rela *) bfd_malloc (amt); |
| if (external_relocs == NULL) |
| { |
| goto error_ret_free_local; |
| } |
| |
| /* Likewise for the internal relocations. */ |
| amt = section->reloc_count; |
| amt *= sizeof (Elf_Internal_Rela); |
| internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); |
| if (internal_relocs == NULL) |
| { |
| free (external_relocs); |
| goto error_ret_free_local; |
| } |
| |
| /* Read in the external relocs. */ |
| input_rel_hdr = &elf_section_data (section)->rel_hdr; |
| if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0 |
| || bfd_bread ((PTR) external_relocs, |
| input_rel_hdr->sh_size, |
| input_bfd) != input_rel_hdr->sh_size) |
| { |
| free (external_relocs); |
| error_ret_free_internal: |
| free (internal_relocs); |
| goto error_ret_free_local; |
| } |
| |
| /* Swap in the relocs. */ |
| erela = external_relocs; |
| erelaend = erela + section->reloc_count; |
| irela = internal_relocs; |
| for (; erela < erelaend; erela++, irela++) |
| bfd_elf64_swap_reloca_in (input_bfd, erela, irela); |
| |
| /* We're done with the external relocs, free them. */ |
| free (external_relocs); |
| |
| /* Now examine each relocation. */ |
| irela = internal_relocs; |
| irelaend = irela + section->reloc_count; |
| for (; irela < irelaend; irela++) |
| { |
| unsigned int r_type, r_indx; |
| enum ppc_stub_type stub_type; |
| struct ppc_stub_hash_entry *stub_entry; |
| asection *sym_sec; |
| bfd_vma sym_value; |
| bfd_vma destination; |
| struct ppc_link_hash_entry *hash; |
| char *stub_name; |
| const asection *id_sec; |
| |
| r_type = ELF64_R_TYPE (irela->r_info); |
| r_indx = ELF64_R_SYM (irela->r_info); |
| |
| if (r_type >= (unsigned int) R_PPC_max) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| goto error_ret_free_internal; |
| } |
| |
| /* Only look for stubs on branch instructions. */ |
| if (r_type != (unsigned int) R_PPC64_REL24 |
| && r_type != (unsigned int) R_PPC64_REL14 |
| && r_type != (unsigned int) R_PPC64_REL14_BRTAKEN |
| && r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN) |
| continue; |
| |
| /* Now determine the call target, its name, value, |
| section. */ |
| sym_sec = NULL; |
| sym_value = 0; |
| destination = 0; |
| hash = NULL; |
| if (r_indx < symtab_hdr->sh_info) |
| { |
| /* It's a local symbol. */ |
| Elf_Internal_Sym *sym; |
| Elf_Internal_Shdr *hdr; |
| |
| sym = local_syms + r_indx; |
| hdr = elf_elfsections (input_bfd)[sym->st_shndx]; |
| sym_sec = hdr->bfd_section; |
| if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| sym_value = sym->st_value; |
| destination = (sym_value + irela->r_addend |
| + sym_sec->output_offset |
| + sym_sec->output_section->vma); |
| } |
| else |
| { |
| /* It's an external symbol. */ |
| int e_indx; |
| |
| e_indx = r_indx - symtab_hdr->sh_info; |
| hash = ((struct ppc_link_hash_entry *) |
| elf_sym_hashes (input_bfd)[e_indx]); |
| |
| while (hash->elf.root.type == bfd_link_hash_indirect |
| || hash->elf.root.type == bfd_link_hash_warning) |
| hash = ((struct ppc_link_hash_entry *) |
| hash->elf.root.u.i.link); |
| |
| if (hash->elf.root.type == bfd_link_hash_defined |
| || hash->elf.root.type == bfd_link_hash_defweak) |
| { |
| sym_sec = hash->elf.root.u.def.section; |
| sym_value = hash->elf.root.u.def.value; |
| if (sym_sec->output_section != NULL) |
| destination = (sym_value + irela->r_addend |
| + sym_sec->output_offset |
| + sym_sec->output_section->vma); |
| } |
| else if (hash->elf.root.type == bfd_link_hash_undefweak) |
| ; |
| else if (hash->elf.root.type == bfd_link_hash_undefined) |
| ; |
| else |
| { |
| bfd_set_error (bfd_error_bad_value); |
| goto error_ret_free_internal; |
| } |
| } |
| |
| /* Determine what (if any) linker stub is needed. */ |
| stub_type = ppc_type_of_stub (section, irela, &hash, |
| destination); |
| if (stub_type == ppc_stub_none) |
| 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); |
| goto error_ret_free_local; |
| } |
| |
| stub_entry->target_value = sym_value; |
| stub_entry->target_section = sym_sec; |
| stub_entry->stub_type = stub_type; |
| stub_entry->h = hash; |
| stub_changed = true; |
| } |
| |
| /* We're done with the internal relocs, free them. */ |
| free (internal_relocs); |
| } |
| } |
| |
| if (!stub_changed) |
| break; |
| |
| /* OK, we've 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) |
| { |
| stub_sec->_raw_size = 0; |
| stub_sec->_cooked_size = 0; |
| } |
| htab->sbrlt->_raw_size = 0; |
| htab->sbrlt->_cooked_size = 0; |
| |
| bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab); |
| |
| /* Ask the linker to do its stuff. */ |
| (*htab->layout_sections_again) (); |
| } |
| |
| if (htab->sbrlt->_raw_size == 0) |
| { |
| _bfd_strip_section_from_output (info, htab->sbrlt); |
| if (htab->srelbrlt != NULL) |
| _bfd_strip_section_from_output (info, htab->srelbrlt); |
| } |
| |
| ret = true; |
| |
| error_ret_free_local: |
| while (htab->bfd_count-- > 0) |
| if (htab->all_local_syms[htab->bfd_count]) |
| free (htab->all_local_syms[htab->bfd_count]); |
| free (htab->all_local_syms); |
| |
| return ret; |
| } |
| |
| /* 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 (obfd) |
| 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. */ |
| |
| boolean |
| ppc64_elf_build_stubs (info) |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| asection *stub_sec; |
| bfd_vma plt_r2; |
| bfd_byte *p; |
| |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; |
| stub_sec = stub_sec->next) |
| { |
| bfd_size_type size; |
| |
| /* Allocate memory to hold the linker stubs. */ |
| size = stub_sec->_raw_size; |
| if (size != 0) |
| { |
| stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size); |
| if (stub_sec->contents == NULL) |
| return false; |
| } |
| stub_sec->_cooked_size = 0; |
| } |
| |
| if (htab->splt != NULL) |
| { |
| /* Build the .glink plt call stub. */ |
| plt_r2 = (htab->splt->output_offset |
| + htab->splt->output_section->vma |
| - elf_gp (htab->splt->output_section->owner) |
| - TOC_BASE_OFF); |
| p = htab->sglink->contents; |
| p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1); |
| while (p - htab->sglink->contents < GLINK_CALL_STUB_SIZE) |
| { |
| bfd_put_32 (htab->sglink->owner, NOP, p); |
| p += 4; |
| } |
| htab->sglink->_cooked_size = p - htab->sglink->contents; |
| |
| /* Use reloc_count to count entries. */ |
| htab->sglink->reloc_count = 0; |
| } |
| |
| if (htab->sbrlt->_raw_size != 0) |
| { |
| htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner, |
| htab->sbrlt->_raw_size); |
| if (htab->sbrlt->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); |
| htab->sglink->reloc_count = 0; |
| |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; |
| stub_sec = stub_sec->next) |
| { |
| if (stub_sec->_raw_size != stub_sec->_cooked_size) |
| break; |
| } |
| |
| if (stub_sec != NULL |
| || htab->sglink->_raw_size != htab->sglink->_cooked_size) |
| { |
| htab->stub_error = true; |
| (*_bfd_error_handler) (_("stubs don't match calculated size")); |
| } |
| |
| return !htab->stub_error; |
| } |
| |
| /* Set up any other section flags and such that may be necessary. */ |
| |
| static boolean |
| ppc64_elf_fake_sections (abfd, shdr, asect) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| Elf64_Internal_Shdr *shdr; |
| asection *asect; |
| { |
| if ((asect->flags & SEC_EXCLUDE) != 0) |
| shdr->sh_flags |= SHF_EXCLUDE; |
| |
| if ((asect->flags & SEC_SORT_ENTRIES) != 0) |
| shdr->sh_type = SHT_ORDERED; |
| |
| return true; |
| } |
| |
| /* 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 |
| relocateable 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 relocateable 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 boolean |
| ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| contents, relocs, local_syms, local_sections) |
| 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; |
| bfd_vma *local_got_offsets; |
| bfd_vma TOCstart; |
| boolean ret = true; |
| boolean is_opd; |
| /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ |
| boolean is_power4 = false; |
| |
| /* Initialize howto table if needed. */ |
| if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| ppc_howto_init (); |
| |
| htab = ppc_hash_table (info); |
| local_got_offsets = elf_local_got_offsets (input_bfd); |
| TOCstart = elf_gp (output_bfd); |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (input_bfd); |
| is_opd = strcmp (bfd_get_section_name (abfd, input_section), ".opd") == 0; |
| |
| rel = relocs; |
| relend = relocs + input_section->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| enum elf_ppc_reloc_type r_type; |
| bfd_vma offset; |
| bfd_vma addend; |
| bfd_reloc_status_type r; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| struct elf_link_hash_entry *h; |
| struct elf_link_hash_entry *fdh; |
| const char *sym_name; |
| unsigned long r_symndx; |
| bfd_vma relocation; |
| boolean unresolved_reloc; |
| long insn; |
| struct ppc_stub_hash_entry *stub_entry; |
| bfd_vma max_br_offset; |
| bfd_vma from; |
| |
| r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| |
| if (info->relocateable) |
| { |
| /* This is a relocatable link. We don't have to change |
| anything, unless the reloc is against a section symbol, |
| in which case we have to adjust according to where the |
| section symbol winds up in the output section. */ |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| if ((unsigned) ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| { |
| sec = local_sections[r_symndx]; |
| rel->r_addend += sec->output_offset + sym->st_value; |
| } |
| } |
| continue; |
| } |
| |
| /* This is a final link. */ |
| |
| offset = rel->r_offset; |
| addend = rel->r_addend; |
| r = bfd_reloc_other; |
| sym = (Elf_Internal_Sym *) 0; |
| sec = (asection *) 0; |
| h = (struct elf_link_hash_entry *) 0; |
| sym_name = (const char *) 0; |
| unresolved_reloc = false; |
| |
| if (r_type == R_PPC64_TOC) |
| { |
| /* Relocation value is TOC base. Symbol is ignored. */ |
| relocation = TOCstart + TOC_BASE_OFF; |
| } |
| else if (r_symndx < symtab_hdr->sh_info) |
| { |
| /* It's a local symbol. */ |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| sym_name = "<local symbol>"; |
| |
| relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
| /* rel may have changed, update our copy of addend. */ |
| addend = rel->r_addend; |
| } |
| else |
| { |
| /* It's a global symbol. */ |
| 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; |
| sym_name = h->root.root.string; |
| relocation = 0; |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| sec = h->root.u.def.section; |
| if (sec->output_section == NULL) |
| /* Set a flag that will be cleared later if we find a |
| relocation value for this symbol. output_section |
| is typically NULL for symbols satisfied by a shared |
| library. */ |
| unresolved_reloc = true; |
| else |
| relocation = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else if (h->root.type == bfd_link_hash_undefweak) |
| ; |
| else if (info->shared |
| && (!info->symbolic || info->allow_shlib_undefined) |
| && !info->no_undefined |
| && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| ; |
| else |
| { |
| if (! ((*info->callbacks->undefined_symbol) |
| (info, h->root.root.string, input_bfd, input_section, |
| offset, (!info->shared |
| || info->no_undefined |
| || ELF_ST_VISIBILITY (h->other))))) |
| return false; |
| } |
| } |
| |
| /* First handle relocations that tweak non-addend part of insn. */ |
| insn = 0; |
| 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 + offset) & ~(0x01 << 21); |
| 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 |
| { |
| from = (offset |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| |
| /* Invert 'y' bit if not the default. */ |
| if ((bfd_signed_vma) (relocation + addend - from) < 0) |
| insn ^= 0x01 << 21; |
| } |
| |
| bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset); |
| break; |
| |
| case R_PPC64_REL24: |
| /* A REL24 branching to a linkage function is followed by a |
| nop. We replace the nop with a ld in order to restore |
| the TOC base pointer. Only calls to shared objects need |
| to alter the TOC base. These are recognized by their |
| need for a PLT entry. */ |
| if (h != NULL |
| && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL |
| && fdh->plt.offset != (bfd_vma) -1 |
| && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh, |
| rel, htab)) != NULL) |
| { |
| boolean can_plt_call = 0; |
| |
| if (offset + 8 <= input_section->_cooked_size) |
| { |
| insn = bfd_get_32 (input_bfd, contents + offset + 4); |
| if (insn == NOP |
| || insn == CROR_151515 || insn == CROR_313131) |
| { |
| bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1, |
| contents + offset + 4); |
| can_plt_call = 1; |
| } |
| } |
| |
| if (!can_plt_call) |
| { |
| /* If this is a plain branch rather than a branch |
| and link, don't require a nop. */ |
| insn = bfd_get_32 (input_bfd, contents + offset); |
| if ((insn & 1) == 0) |
| can_plt_call = 1; |
| } |
| |
| if (can_plt_call) |
| { |
| relocation = (stub_entry->stub_offset |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_sec->output_section->vma); |
| addend = 0; |
| unresolved_reloc = false; |
| } |
| } |
| |
| if (h != NULL |
| && h->root.type == bfd_link_hash_undefweak |
| && relocation == 0 |
| && addend == 0) |
| { |
| /* Tweak calls to undefined weak functions to point at a |
| blr. We can thus call a weak function without first |
| checking whether the function is defined. We have a |
| blr at the end of .sfpr. */ |
| BFD_ASSERT (htab->sfpr->_raw_size != 0); |
| relocation = (htab->sfpr->_raw_size - 4 |
| + htab->sfpr->output_offset |
| + htab->sfpr->output_section->vma); |
| from = (offset |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| |
| /* But let's not be silly about it. If the blr isn't in |
| reach, just go to the next instruction. */ |
| if (relocation - from + (1 << 25) >= (1 << 26) |
| || htab->sfpr->_raw_size == 0) |
| relocation = from + 4; |
| } |
| break; |
| } |
| |
| /* Set `addend'. */ |
| switch (r_type) |
| { |
| default: |
| (*_bfd_error_handler) |
| (_("%s: unknown relocation type %d for symbol %s"), |
| bfd_archive_filename (input_bfd), (int) r_type, sym_name); |
| |
| bfd_set_error (bfd_error_bad_value); |
| ret = false; |
| continue; |
| |
| case R_PPC64_NONE: |
| case R_PPC_GNU_VTINHERIT: |
| case R_PPC_GNU_VTENTRY: |
| continue; |
| |
| /* GOT16 relocations. Like an ADDR16 using the symbol's |
| address in the GOT as relocation value instead of the |
| symbols value itself. Also, create a GOT entry for the |
| symbol and put the symbol value there. */ |
| 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: |
| { |
| /* Relocation is to the entry for this symbol in the global |
| offset table. */ |
| bfd_vma off; |
| |
| if (htab->sgot == NULL) |
| abort (); |
| |
| if (h != NULL) |
| { |
| boolean dyn; |
| |
| off = h->got.offset; |
| dyn = htab->elf.dynamic_sections_created; |
| if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) |
| || (info->shared |
| && (info->symbolic |
| || h->dynindx == -1 |
| || (h->elf_link_hash_flags |
| & ELF_LINK_FORCED_LOCAL)) |
| && (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR))) |
| { |
| /* 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. We must initialize |
| this entry in the global offset table. Since the |
| offset must always be a multiple of 8, we use the |
| least significant bit to record whether we have |
| initialized it already. |
| |
| When doing a dynamic link, we create a .rel.got |
| relocation entry to initialize the value. This |
| is done in the finish_dynamic_symbol routine. */ |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| bfd_put_64 (output_bfd, relocation, |
| htab->sgot->contents + off); |
| h->got.offset |= 1; |
| } |
| } |
| else |
| unresolved_reloc = false; |
| } |
| else |
| { |
| if (local_got_offsets == NULL) |
| abort (); |
| |
| off = local_got_offsets[r_symndx]; |
| |
| /* The offset must always be a multiple of 8. We use |
| the least significant bit to record whether we have |
| already processed this entry. */ |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| bfd_put_64 (output_bfd, relocation, |
| htab->sgot->contents + off); |
| |
| if (info->shared) |
| { |
| Elf_Internal_Rela outrel; |
| Elf64_External_Rela *loc; |
| |
| /* We need to generate a R_PPC64_RELATIVE reloc |
| for the dynamic linker. */ |
| outrel.r_offset = (htab->sgot->output_section->vma |
| + htab->sgot->output_offset |
| + off); |
| outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| outrel.r_addend = relocation; |
| loc = (Elf64_External_Rela *) htab->srelgot->contents; |
| loc += htab->srelgot->reloc_count++; |
| bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| } |
| |
| local_got_offsets[r_symndx] |= 1; |
| } |
| } |
| |
| if (off >= (bfd_vma) -2) |
| abort (); |
| |
| relocation = htab->sgot->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; |
| |
| if (h->plt.offset == (bfd_vma) -1 |
| || htab->splt == NULL) |
| { |
| /* We didn't make a PLT entry for this symbol. This |
| happens when statically linking PIC code, or when |
| using -Bsymbolic. */ |
| break; |
| } |
| |
| relocation = (htab->splt->output_section->vma |
| + htab->splt->output_offset |
| + h->plt.offset); |
| unresolved_reloc = false; |
| break; |
| |
| /* 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 + TOC_BASE_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 != (asection *) 0) |
| 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; |
| |
| /* Relocations that may need to be propagated if this is a |
| dynamic object. */ |
| 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_ADDR30: |
| case R_PPC64_ADDR32: |
| case R_PPC64_ADDR64: |
| case R_PPC64_UADDR16: |
| case R_PPC64_UADDR32: |
| case R_PPC64_UADDR64: |
| /* r_symndx will be zero only for relocs against symbols |
| from removed linkonce sections, or sections discarded by |
| a linker script. */ |
| if (r_symndx == 0) |
| break; |
| /* Fall thru. */ |
| |
| case R_PPC64_TOC: |
| if ((input_section->flags & SEC_ALLOC) == 0) |
| break; |
| |
| if (NO_OPD_RELOCS && is_opd) |
| break; |
| |
| if ((info->shared |
| && (IS_ABSOLUTE_RELOC (r_type) |
| || (h != NULL |
| && h->dynindx != -1 |
| && (! info->symbolic |
| || (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| || (!info->shared |
| && h != NULL |
| && h->dynindx != -1 |
| && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| && (((h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| && (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| || h->root.type == bfd_link_hash_undefweak |
| || h->root.type == bfd_link_hash_undefined))) |
| { |
| Elf_Internal_Rela outrel; |
| boolean skip, relocate; |
| asection *sreloc; |
| Elf64_External_Rela *loc; |
| |
| /* When generating a dynamic object, these relocations |
| are copied into the output file to be resolved at run |
| time. */ |
| |
| skip = false; |
| relocate = false; |
| |
| outrel.r_offset = |
| _bfd_elf_section_offset (output_bfd, info, input_section, |
| rel->r_offset); |
| if (outrel.r_offset == (bfd_vma) -1) |
| skip = true; |
| else if (outrel.r_offset == (bfd_vma) -2) |
| skip = true, relocate = true; |
| outrel.r_offset += (input_section->output_section->vma |
| + input_section->output_offset); |
| outrel.r_addend = addend; |
| |
| if (skip) |
| memset (&outrel, 0, sizeof outrel); |
| else if (h != NULL |
| && h->dynindx != -1 |
| && !is_opd |
| && (!IS_ABSOLUTE_RELOC (r_type) |
| || !info->shared |
| || !info->symbolic |
| || (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| outrel.r_info = ELF64_R_INFO (h->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; |
| relocate = true; |
| if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) |
| { |
| outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| } |
| 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; |
| |
| /* 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 (); |
| |
| loc = (Elf64_External_Rela *) sreloc->contents; |
| loc += sreloc->reloc_count++; |
| 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. */ |
| if (! relocate) |
| continue; |
| } |
| 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 thru */ |
| |
| 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) |
| (_("%s: Relocation %s is not supported for symbol %s."), |
| bfd_archive_filename (input_bfd), |
| ppc64_elf_howto_table[(int) 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_PLT16_HA: |
| case R_PPC64_TOC16_HA: |
| case R_PPC64_SECTOFF_HA: |
| /* 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) |
| /* Add 0x10000 if sign bit in 0:15 is set. */ |
| addend += ((relocation + addend) & 0x8000) << 1; |
| 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: |
| if (((relocation + addend) & 3) != 0) |
| { |
| (*_bfd_error_handler) |
| (_("%s: error: relocation %s not a multiple of 4"), |
| bfd_archive_filename (input_bfd), |
| ppc64_elf_howto_table[(int) r_type]->name); |
| bfd_set_error (bfd_error_bad_value); |
| ret = false; |
| continue; |
| } |
| break; |
| |
| case R_PPC64_REL14: |
| case R_PPC64_REL14_BRNTAKEN: |
| case R_PPC64_REL14_BRTAKEN: |
| max_br_offset = 1 << 15; |
| goto branch_check; |
| |
| case R_PPC64_REL24: |
| max_br_offset = 1 << 25; |
| |
| branch_check: |
| /* If the branch is out of reach, then redirect the |
| call to the local stub for this function. */ |
| from = (offset |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| if (relocation + addend - from + max_br_offset >= 2 * max_br_offset |
| && (stub_entry = ppc_get_stub_entry (input_section, sec, h, |
| rel, htab)) != 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; |
| } |
| break; |
| } |
| |
| /* FIXME: Why do we allow debugging sections to escape this error? |
| More importantly, why do we not emit dynamic relocs above in |
| debugging sections (which are ! SEC_ALLOC)? If we had |
| emitted the dynamic reloc, we could remove the fudge here. */ |
| if (unresolved_reloc |
| && !(info->shared |
| && (input_section->flags & SEC_DEBUGGING) != 0 |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
| (*_bfd_error_handler) |
| (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), |
| bfd_archive_filename (input_bfd), |
| bfd_get_section_name (input_bfd, input_section), |
| (long) rel->r_offset, |
| h->root.root.string); |
| |
| r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type], |
| input_bfd, |
| input_section, |
| contents, |
| offset, |
| relocation, |
| addend); |
| |
| if (r == bfd_reloc_ok) |
| ; |
| else if (r == bfd_reloc_overflow) |
| { |
| const char *name; |
| |
| if (h != NULL) |
| { |
| if (h->root.type == bfd_link_hash_undefweak |
| && ppc64_elf_howto_table[(int) 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; |
| } |
| |
| name = h->root.root.string; |
| } |
| else |
| { |
| name = bfd_elf_string_from_elf_section (input_bfd, |
| symtab_hdr->sh_link, |
| sym->st_name); |
| if (name == NULL) |
| continue; |
| if (*name == '\0') |
| name = bfd_section_name (input_bfd, sec); |
| } |
| |
| if (! ((*info->callbacks->reloc_overflow) |
| (info, name, ppc64_elf_howto_table[(int) r_type]->name, |
| (bfd_vma) 0, input_bfd, input_section, offset))) |
| return false; |
| } |
| else |
| ret = false; |
| } |
| |
| return ret; |
| } |
| |
| /* Finish up dynamic symbol handling. We set the contents of various |
| dynamic sections here. */ |
| |
| static boolean |
| ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| { |
| struct ppc_link_hash_table *htab; |
| bfd *dynobj; |
| |
| htab = ppc_hash_table (info); |
| dynobj = htab->elf.dynobj; |
| |
| if (h->plt.offset != (bfd_vma) -1 |
| && ((struct ppc_link_hash_entry *) h)->is_func_descriptor) |
| { |
| Elf_Internal_Rela rela; |
| Elf64_External_Rela *loc; |
| |
| /* This symbol has an entry in the procedure linkage table. Set |
| it up. */ |
| |
| if (htab->splt == NULL |
| || htab->srelplt == NULL |
| || htab->sglink == NULL) |
| abort (); |
| |
| /* Create a JMP_SLOT reloc to inform the dynamic linker to |
| fill in the PLT entry. */ |
| |
| rela.r_offset = (htab->splt->output_section->vma |
| + htab->splt->output_offset |
| + h->plt.offset); |
| rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); |
| rela.r_addend = 0; |
| |
| loc = (Elf64_External_Rela *) htab->srelplt->contents; |
| loc += (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| |
| if (h->got.offset != (bfd_vma) -1) |
| { |
| Elf_Internal_Rela rela; |
| Elf64_External_Rela *loc; |
| |
| /* This symbol has an entry in the global offset table. Set it |
| up. */ |
| |
| if (htab->sgot == NULL || htab->srelgot == NULL) |
| abort (); |
| |
| rela.r_offset = (htab->sgot->output_section->vma |
| + htab->sgot->output_offset |
| + (h->got.offset &~ (bfd_vma) 1)); |
| |
| /* If this is a static link, or it is a -Bsymbolic link and the |
| symbol is defined locally or was forced to be local because |
| of a version file, we just want to emit a RELATIVE reloc. |
| The entry in the global offset table will already have been |
| initialized in the relocate_section function. */ |
| if (info->shared |
| && (info->symbolic |
| || h->dynindx == -1 |
| || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| { |
| BFD_ASSERT((h->got.offset & 1) != 0); |
| rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| rela.r_addend = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| } |
| else |
| { |
| BFD_ASSERT ((h->got.offset & 1) == 0); |
| bfd_put_64 (output_bfd, (bfd_vma) 0, |
| htab->sgot->contents + h->got.offset); |
| rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT); |
| rela.r_addend = 0; |
| } |
| |
| loc = (Elf64_External_Rela *) htab->srelgot->contents; |
| loc += htab->srelgot->reloc_count++; |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| |
| if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| { |
| Elf_Internal_Rela rela; |
| Elf64_External_Rela *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->srelbss == 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 = (Elf64_External_Rela *) htab->srelbss->contents; |
| loc += htab->srelbss->reloc_count++; |
| 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 (rela) |
| const Elf_Internal_Rela *rela; |
| { |
| enum elf_ppc_reloc_type r_type; |
| |
| r_type = (enum elf_ppc_reloc_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 boolean |
| ppc64_elf_finish_dynamic_sections (output_bfd, info) |
| 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->sgot == NULL) |
| abort (); |
| |
| dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_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: |
| dyn.d_un.d_ptr = (htab->sglink->output_section->vma |
| + htab->sglink->output_offset); |
| break; |
| |
| case DT_PPC64_OPD: |
| s = bfd_get_section_by_name (output_bfd, ".opd"); |
| if (s != NULL) |
| dyn.d_un.d_ptr = s->vma; |
| break; |
| |
| case DT_PPC64_OPDSZ: |
| s = bfd_get_section_by_name (output_bfd, ".opd"); |
| if (s != NULL) |
| dyn.d_un.d_val = s->_raw_size; |
| break; |
| |
| case DT_PLTGOT: |
| dyn.d_un.d_ptr = (htab->splt->output_section->vma |
| + htab->splt->output_offset); |
| break; |
| |
| case DT_JMPREL: |
| dyn.d_un.d_ptr = (htab->srelplt->output_section->vma |
| + htab->srelplt->output_offset); |
| break; |
| |
| case DT_PLTRELSZ: |
| dyn.d_un.d_val = htab->srelplt->_raw_size; |
| break; |
| |
| case DT_RELASZ: |
| /* Don't count procedure linkage table relocs in the |
| overall reloc count. */ |
| if (htab->srelplt != NULL) |
| dyn.d_un.d_val -= htab->srelplt->_raw_size; |
| break; |
| } |
| |
| bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| } |
| } |
| |
| if (htab->sgot != NULL && htab->sgot->_raw_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->sgot->contents); |
| |
| /* Set .got entry size. */ |
| elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8; |
| } |
| |
| if (htab->splt != NULL && htab->splt->_raw_size != 0) |
| { |
| /* Set .plt entry size. */ |
| elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize |
| = PLT_ENTRY_SIZE; |
| } |
| |
| return true; |
| } |
| |
| #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_info_to_howto ppc64_elf_info_to_howto |
| |
| #ifdef EM_CYGNUS_POWERPC |
| #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC |
| #endif |
| |
| #ifdef EM_PPC_OLD |
| #define ELF_MACHINE_ALT2 EM_PPC_OLD |
| #endif |
| |
| #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_symbol_offset 0 |
| #define elf_backend_got_header_size 8 |
| #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_can_refcount 1 |
| |
| #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup |
| #define bfd_elf64_bfd_set_private_flags ppc64_elf_set_private_flags |
| #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data |
| #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 elf_backend_section_from_shdr ppc64_elf_section_from_shdr |
| #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_check_relocs ppc64_elf_check_relocs |
| #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_fake_sections ppc64_elf_fake_sections |
| #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 |
| |
| #include "elf64-target.h" |