| /* PowerPC-specific support for 32-bit ELF |
| Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
| Free Software Foundation, Inc. |
| Written by Ian Lance Taylor, Cygnus Support. |
| |
| 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 a preliminary PowerPC ELF ABI. The |
| information may not match the final PowerPC ELF ABI. It includes |
| suggestions from the in-progress Embedded PowerPC ABI, and that |
| information may also not match. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "bfdlink.h" |
| #include "libbfd.h" |
| #include "elf-bfd.h" |
| #include "elf/ppc.h" |
| |
| #define USE_RELA /* we want RELA relocations, not REL */ |
| |
| static reloc_howto_type *ppc_elf_reloc_type_lookup |
| PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| static void ppc_elf_info_to_howto |
| PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst)); |
| static void ppc_elf_howto_init PARAMS ((void)); |
| static bfd_reloc_status_type ppc_elf_addr16_ha_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static boolean ppc_elf_set_private_flags PARAMS ((bfd *, flagword)); |
| static boolean ppc_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *)); |
| static boolean ppc_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *)); |
| |
| static int ppc_elf_additional_program_headers PARAMS ((bfd *)); |
| static boolean ppc_elf_modify_segment_map PARAMS ((bfd *)); |
| |
| static boolean ppc_elf_create_dynamic_sections |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| |
| static boolean ppc_elf_section_from_shdr PARAMS ((bfd *, |
| Elf32_Internal_Shdr *, |
| char *)); |
| static boolean ppc_elf_fake_sections |
| PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *)); |
| |
| static elf_linker_section_t *ppc_elf_create_linker_section |
| PARAMS ((bfd *abfd, |
| struct bfd_link_info *info, |
| enum elf_linker_section_enum)); |
| |
| static boolean ppc_elf_check_relocs PARAMS ((bfd *, |
| struct bfd_link_info *, |
| asection *, |
| const Elf_Internal_Rela *)); |
| |
| static asection * ppc_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 ppc_elf_gc_sweep_hook PARAMS ((bfd *abfd, |
| struct bfd_link_info *info, |
| asection *sec, |
| const Elf_Internal_Rela *relocs)); |
| |
| static boolean ppc_elf_adjust_dynamic_symbol PARAMS ((struct bfd_link_info *, |
| struct elf_link_hash_entry *)); |
| |
| static boolean ppc_elf_size_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); |
| |
| static boolean ppc_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 ppc_elf_add_symbol_hook PARAMS ((bfd *, |
| struct bfd_link_info *, |
| const Elf_Internal_Sym *, |
| const char **, |
| flagword *, |
| asection **, |
| bfd_vma *)); |
| |
| static boolean ppc_elf_finish_dynamic_symbol PARAMS ((bfd *, |
| struct bfd_link_info *, |
| struct elf_link_hash_entry *, |
| Elf_Internal_Sym *)); |
| |
| static boolean ppc_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); |
| |
| #define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */ |
| #define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */ |
| #define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */ |
| |
| /* 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 12 |
| /* The initial size of the plt reserved for the dynamic linker. */ |
| #define PLT_INITIAL_ENTRY_SIZE 72 |
| /* The size of the gap between entries in the PLT. */ |
| #define PLT_SLOT_SIZE 8 |
| /* The number of single-slot PLT entries (the rest use two slots). */ |
| #define PLT_NUM_SINGLE_ENTRIES 8192 |
| |
| /* Will references to this symbol always reference the symbol |
| in this object? */ |
| #define SYMBOL_REFERENCES_LOCAL(INFO, H) \ |
| ((! INFO->shared \ |
| || INFO->symbolic \ |
| || H->dynindx == -1 \ |
| || ELF_ST_VISIBILITY (H->other) == STV_INTERNAL \ |
| || ELF_ST_VISIBILITY (H->other) == STV_HIDDEN) \ |
| && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
| |
| /* Will _calls_ to this symbol always call the version in this object? */ |
| #define SYMBOL_CALLS_LOCAL(INFO, H) \ |
| ((! INFO->shared \ |
| || INFO->symbolic \ |
| || H->dynindx == -1 \ |
| || ELF_ST_VISIBILITY (H->other) != STV_DEFAULT) \ |
| && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
| |
| static reloc_howto_type *ppc_elf_howto_table[(int) R_PPC_max]; |
| |
| static reloc_howto_type ppc_elf_howto_raw[] = { |
| /* This reloc does nothing. */ |
| HOWTO (R_PPC_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_PPC_NONE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A standard 32 bit relocation. */ |
| HOWTO (R_PPC_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_PPC_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_PPC_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_PPC_ADDR24", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x3fffffc, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A standard 16 bit relocation. */ |
| HOWTO (R_PPC_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_PPC_ADDR16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 16 bit relocation without overflow. */ |
| HOWTO (R_PPC_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_PPC_ADDR16_LO", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* The high order 16 bits of an address. */ |
| HOWTO (R_PPC_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_PPC_ADDR16_HI", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* The high order 16 bits of an address, plus 1 if the contents of |
| the low 16 bits, treated as a signed number, is negative. */ |
| HOWTO (R_PPC_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 */ |
| ppc_elf_addr16_ha_reloc, /* special_function */ |
| "R_PPC_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_PPC_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_PPC_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_PPC_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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_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_PPC_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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_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_PPC_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_PPC_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_PPC_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_PPC_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_PPC_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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_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_PPC_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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_REL14_BRNTAKEN",/* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* Like R_PPC_ADDR16, but referring to the GOT table entry for the |
| symbol. */ |
| HOWTO (R_PPC_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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_GOT16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for |
| the symbol. */ |
| HOWTO (R_PPC_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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_GOT16_LO", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for |
| the symbol. */ |
| HOWTO (R_PPC_GOT16_HI, /* type */ |
| 16, /* 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_PPC_GOT16_HI", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for |
| the symbol. */ |
| HOWTO (R_PPC_GOT16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc_elf_addr16_ha_reloc, /* special_function */ |
| "R_PPC_GOT16_HA", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Like R_PPC_REL24, but referring to the procedure linkage table |
| entry for the symbol. */ |
| HOWTO (R_PPC_PLTREL24, /* 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_PPC_PLTREL24", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x3fffffc, /* dst_mask */ |
| true), /* 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_PPC_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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_COPY", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Like R_PPC_ADDR32, but used when setting global offset table |
| entries. */ |
| HOWTO (R_PPC_GLOB_DAT, /* 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_PPC_GLOB_DAT", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Marks a procedure linkage table entry for a symbol. */ |
| HOWTO (R_PPC_JMP_SLOT, /* 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_PPC_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 |
| longword is set to the load address of the object, plus the |
| addend. */ |
| HOWTO (R_PPC_RELATIVE, /* 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_PPC_RELATIVE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Like R_PPC_REL24, but uses the value of the symbol within the |
| object rather than the final value. Normally used for |
| _GLOBAL_OFFSET_TABLE_. */ |
| HOWTO (R_PPC_LOCAL24PC, /* 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_PPC_LOCAL24PC", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x3fffffc, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* Like R_PPC_ADDR32, but may be unaligned. */ |
| HOWTO (R_PPC_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_PPC_UADDR32", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Like R_PPC_ADDR16, but may be unaligned. */ |
| HOWTO (R_PPC_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_PPC_UADDR16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 32-bit PC relative */ |
| HOWTO (R_PPC_REL32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_REL32", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* 32-bit relocation to the symbol's procedure linkage table. |
| FIXME: not supported. */ |
| HOWTO (R_PPC_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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_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: not supported. */ |
| HOWTO (R_PPC_PLTREL32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_PLTREL32", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for |
| the symbol. */ |
| HOWTO (R_PPC_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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_PLT16_LO", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for |
| the symbol. */ |
| HOWTO (R_PPC_PLT16_HI, /* type */ |
| 16, /* 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_PPC_PLT16_HI", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for |
| the symbol. */ |
| HOWTO (R_PPC_PLT16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc_elf_addr16_ha_reloc, /* special_function */ |
| "R_PPC_PLT16_HA", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with |
| small data items. */ |
| HOWTO (R_PPC_SDAREL16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_SDAREL16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 32-bit section relative relocation. */ |
| HOWTO (R_PPC_SECTOFF, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_SECTOFF", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* 16-bit lower half section relative relocation. */ |
| HOWTO (R_PPC_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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_SECTOFF_LO", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 16-bit upper half section relative relocation. */ |
| HOWTO (R_PPC_SECTOFF_HI, /* type */ |
| 16, /* 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_PPC_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_PPC_SECTOFF_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc_elf_addr16_ha_reloc, /* special_function */ |
| "R_PPC_SECTOFF_HA", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* The remaining relocs are from the Embedded ELF ABI, and are not |
| in the SVR4 ELF ABI. */ |
| |
| /* 32 bit value resulting from the addend minus the symbol */ |
| HOWTO (R_PPC_EMB_NADDR32, /* 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_PPC_EMB_NADDR32", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 16 bit value resulting from the addend minus the symbol */ |
| HOWTO (R_PPC_EMB_NADDR16, /* 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_PPC_EMB_NADDR16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 16 bit value resulting from the addend minus the symbol */ |
| HOWTO (R_PPC_EMB_NADDR16_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_PPC_EMB_ADDR16_LO", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* The high order 16 bits of the addend minus the symbol */ |
| HOWTO (R_PPC_EMB_NADDR16_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_PPC_EMB_NADDR16_HI", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* The high order 16 bits of the result of the addend minus the address, |
| plus 1 if the contents of the low 16 bits, treated as a signed number, |
| is negative. */ |
| HOWTO (R_PPC_EMB_NADDR16_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 */ |
| ppc_elf_addr16_ha_reloc, /* special_function */ |
| "R_PPC_EMB_NADDR16_HA", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 16 bit value resulting from allocating a 4 byte word to hold an |
| address in the .sdata section, and returning the offset from |
| _SDA_BASE_ for that relocation */ |
| HOWTO (R_PPC_EMB_SDAI16, /* 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_PPC_EMB_SDAI16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 16 bit value resulting from allocating a 4 byte word to hold an |
| address in the .sdata2 section, and returning the offset from |
| _SDA2_BASE_ for that relocation */ |
| HOWTO (R_PPC_EMB_SDA2I16, /* 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_PPC_EMB_SDA2I16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with |
| small data items. */ |
| HOWTO (R_PPC_EMB_SDA2REL, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_EMB_SDA2REL", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit |
| signed offset from the appropriate base, and filling in the register |
| field with the appropriate register (0, 2, or 13). */ |
| HOWTO (R_PPC_EMB_SDA21, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_EMB_SDA21", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Relocation not handled: R_PPC_EMB_MRKREF */ |
| /* Relocation not handled: R_PPC_EMB_RELSEC16 */ |
| /* Relocation not handled: R_PPC_EMB_RELST_LO */ |
| /* Relocation not handled: R_PPC_EMB_RELST_HI */ |
| /* Relocation not handled: R_PPC_EMB_RELST_HA */ |
| /* Relocation not handled: R_PPC_EMB_BIT_FLD */ |
| |
| /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling |
| in the 16 bit signed offset from the appropriate base, and filling in the |
| register field with the appropriate register (0, 2, or 13). */ |
| HOWTO (R_PPC_EMB_RELSDA, /* type */ |
| 0, /* rightshift */ |
| 1, /* 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_PPC_EMB_RELSDA", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable hierarchy */ |
| HOWTO (R_PPC_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_PPC_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_PPC_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_PPC_GNU_VTENTRY", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Phony reloc to handle AIX style TOC entries */ |
| HOWTO (R_PPC_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 */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC_TOC16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| }; |
| |
| /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ |
| |
| static void |
| ppc_elf_howto_init () |
| { |
| unsigned int i, type; |
| |
| for (i = 0; i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); i++) |
| { |
| type = ppc_elf_howto_raw[i].type; |
| BFD_ASSERT (type < sizeof (ppc_elf_howto_table) / sizeof (ppc_elf_howto_table[0])); |
| ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; |
| } |
| } |
| |
| /* This function handles relaxing for the PPC with option --mpc860c0[=<n>]. |
| |
| The MPC860, revision C0 or earlier contains a bug in the die. |
| If all of the following conditions are true, the next instruction |
| to be executed *may* be treated as a no-op. |
| 1/ A forward branch is executed. |
| 2/ The branch is predicted as not taken. |
| 3/ The branch is taken. |
| 4/ The branch is located in the last 5 words of a page. |
| (The EOP limit is 5 by default but may be specified as any value from 1-10.) |
| |
| Our software solution is to detect these problematic branches in a |
| linker pass and modify them as follows: |
| 1/ Unconditional branches - Since these are always predicted taken, |
| there is no problem and no action is required. |
| 2/ Conditional backward branches - No problem, no action required. |
| 3/ Conditional forward branches - Ensure that the "inverse prediction |
| bit" is set (ensure it is predicted taken). |
| 4/ Conditional register branches - Ensure that the "y bit" is set |
| (ensure it is predicted taken). |
| */ |
| |
| /* Sort sections by address. */ |
| |
| static int |
| ppc_elf_sort_rela (arg1, arg2) |
| const void *arg1; |
| const void *arg2; |
| { |
| const Elf_Internal_Rela **rela1 = (const Elf_Internal_Rela**) arg1; |
| const Elf_Internal_Rela **rela2 = (const Elf_Internal_Rela**) arg2; |
| |
| /* Sort by offset. */ |
| return ((*rela1)->r_offset - (*rela2)->r_offset); |
| } |
| |
| static boolean |
| ppc_elf_relax_section (abfd, isec, link_info, again) |
| bfd *abfd; |
| asection *isec; |
| struct bfd_link_info *link_info; |
| boolean *again; |
| { |
| #define PAGESIZE 0x1000 |
| |
| bfd_byte *contents = NULL; |
| bfd_byte *free_contents = NULL; |
| Elf_Internal_Rela *internal_relocs = NULL; |
| Elf_Internal_Rela *free_relocs = NULL; |
| Elf_Internal_Rela **rela_comb = NULL; |
| int comb_curr, comb_count; |
| |
| /* We never have to do this more than once per input section. */ |
| *again = false; |
| |
| /* If needed, initialize this section's cooked size. */ |
| if (isec->_cooked_size == 0) |
| isec->_cooked_size = isec->_raw_size; |
| |
| /* We're only interested in text sections which overlap the |
| troublesome area at the end of a page. */ |
| if (link_info->mpc860c0 && (isec->flags & SEC_CODE) && isec->_cooked_size) |
| { |
| bfd_vma dot, end_page, end_section; |
| boolean section_modified; |
| |
| /* Get the section contents. */ |
| /* Get cached copy if it exists. */ |
| if (elf_section_data (isec)->this_hdr.contents != NULL) |
| contents = elf_section_data (isec)->this_hdr.contents; |
| else |
| { |
| /* Go get them off disk. */ |
| contents = (bfd_byte *) bfd_malloc (isec->_raw_size); |
| if (contents == NULL) |
| goto error_return; |
| free_contents = contents; |
| |
| if (! bfd_get_section_contents (abfd, isec, contents, |
| (file_ptr) 0, isec->_raw_size)) |
| goto error_return; |
| } |
| |
| comb_curr = 0; |
| comb_count = 0; |
| if (isec->reloc_count) |
| { |
| unsigned n; |
| |
| /* Get a copy of the native relocations. */ |
| internal_relocs = _bfd_elf32_link_read_relocs ( |
| abfd, isec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
| link_info->keep_memory); |
| if (internal_relocs == NULL) |
| goto error_return; |
| if (! link_info->keep_memory) |
| free_relocs = internal_relocs; |
| |
| /* Setup a faster access method for the reloc info we need. */ |
| rela_comb = (Elf_Internal_Rela**) |
| bfd_malloc (isec->reloc_count*sizeof (Elf_Internal_Rela*)); |
| if (rela_comb == NULL) |
| goto error_return; |
| for (n = 0; n < isec->reloc_count; ++n) |
| { |
| long r_type; |
| |
| r_type = ELF32_R_TYPE (internal_relocs[n].r_info); |
| if (r_type < 0 || r_type >= (int) R_PPC_max) |
| goto error_return; |
| |
| /* Prologue constants are sometimes present in the ".text" |
| sections and they can be identified by their associated relocation. |
| We don't want to process those words and some others which |
| can also be identified by their relocations. However, not all |
| conditional branches will have a relocation so we will |
| only ignore words that 1) have a reloc, and 2) the reloc |
| is not applicable to a conditional branch. |
| The array rela_comb is built here for use in the EOP scan loop. */ |
| switch (r_type) |
| { |
| case R_PPC_ADDR14_BRNTAKEN: /* absolute, predicted not taken */ |
| case R_PPC_REL14: /* relative cond. br. */ |
| case R_PPC_REL14_BRNTAKEN: /* rel. cond. br., predicted not taken */ |
| /* We should check the instruction. */ |
| break; |
| default: |
| /* The word is not a conditional branch - ignore it. */ |
| rela_comb[comb_count++] = &internal_relocs[n]; |
| break; |
| } |
| } |
| if (comb_count > 1) |
| qsort (rela_comb, (size_t) comb_count, sizeof (int), ppc_elf_sort_rela); |
| } |
| |
| /* Enumerate each EOP region that overlaps this section. */ |
| end_section = isec->vma + isec->_cooked_size; |
| dot = end_page = (isec->vma | (PAGESIZE - 1)) + 1; |
| dot -= link_info->mpc860c0; |
| section_modified = false; |
| if (dot < isec->vma) /* Increment the start position if this section */ |
| dot = isec->vma; /* begins in the middle of its first EOP region. */ |
| for (; |
| dot < end_section; |
| dot += PAGESIZE, end_page += PAGESIZE) |
| { |
| |
| /* Check each word in this EOP region. */ |
| for (; dot < end_page; dot += 4) |
| { |
| bfd_vma isec_offset; |
| unsigned long insn; |
| boolean skip, modified; |
| |
| /* Don't process this word if there is a relocation for it and |
| the relocation indicates the word is not a conditional branch. */ |
| skip = false; |
| isec_offset = dot - isec->vma; |
| for (; comb_curr<comb_count; ++comb_curr) |
| { |
| bfd_vma r_offset; |
| |
| r_offset = rela_comb[comb_curr]->r_offset; |
| if (r_offset >= isec_offset) |
| { |
| if (r_offset == isec_offset) skip = true; |
| break; |
| } |
| } |
| if (skip) continue; |
| |
| /* Check the current word for a problematic conditional branch. */ |
| #define BO0(insn) ((insn) & 0x02000000) |
| #define BO2(insn) ((insn) & 0x00800000) |
| #define BO4(insn) ((insn) & 0x00200000) |
| insn = (unsigned long) bfd_get_32 (abfd, contents + isec_offset); |
| modified = false; |
| if ((insn & 0xFc000000) == 0x40000000) |
| { |
| /* Instruction is BCx */ |
| if ((!BO0(insn) || !BO2(insn)) && !BO4(insn)) |
| { |
| bfd_vma target; |
| /* This branch is predicted as "normal". |
| If this is a forward branch, it is problematic. */ |
| |
| target = insn & 0x0000Fffc; /*extract*/ |
| target = (target ^ 0x8000) - 0x8000; /*sign extend*/ |
| if ((insn & 0x00000002) == 0) |
| target += dot; /*convert to abs*/ |
| if (target > dot) |
| { |
| insn |= 0x00200000; /* set the prediction bit */ |
| modified = true; |
| } |
| } |
| } |
| else if ((insn & 0xFc00Fffe) == 0x4c000420) |
| { |
| /* Instruction is BCCTRx */ |
| if ((!BO0(insn) || !BO2(insn)) && !BO4(insn)) |
| { |
| /* This branch is predicted as not-taken. |
| If this is a forward branch, it is problematic. |
| Since we can't tell statically if it will branch forward, |
| always set the prediction bit. */ |
| insn |= 0x00200000; /* set the prediction bit */ |
| modified = true; |
| } |
| } |
| else if ((insn & 0xFc00Fffe) == 0x4c000020) |
| { |
| /* Instruction is BCLRx */ |
| if ((!BO0(insn) || !BO2(insn)) && !BO4(insn)) |
| { |
| /* This branch is predicted as not-taken. |
| If this is a forward branch, it is problematic. |
| Since we can't tell statically if it will branch forward, |
| always set the prediction bit. */ |
| insn |= 0x00200000; /* set the prediction bit */ |
| modified = true; |
| } |
| } |
| #undef BO0 |
| #undef BO2 |
| #undef BO4 |
| if (modified) |
| { |
| bfd_put_32 (abfd, insn, contents + isec_offset); |
| section_modified = true; |
| } |
| } |
| } |
| if (section_modified) |
| { |
| elf_section_data (isec)->this_hdr.contents = contents; |
| free_contents = NULL; |
| } |
| } |
| |
| if (rela_comb != NULL) |
| { |
| free (rela_comb); |
| rela_comb = NULL; |
| } |
| |
| if (free_relocs != NULL) |
| { |
| free (free_relocs); |
| free_relocs = NULL; |
| } |
| |
| if (free_contents != NULL) |
| { |
| if (! link_info->keep_memory) |
| free (free_contents); |
| else |
| { |
| /* Cache the section contents for elf_link_input_bfd. */ |
| elf_section_data (isec)->this_hdr.contents = contents; |
| } |
| free_contents = NULL; |
| } |
| |
| return true; |
| |
| error_return: |
| if (rela_comb != NULL) |
| free (rela_comb); |
| if (free_relocs != NULL) |
| free (free_relocs); |
| if (free_contents != NULL) |
| free (free_contents); |
| return false; |
| } |
| |
| static reloc_howto_type * |
| ppc_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 (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| /* Initialize howto table if needed. */ |
| ppc_elf_howto_init (); |
| |
| switch ((int) code) |
| { |
| default: |
| return (reloc_howto_type *) NULL; |
| |
| case BFD_RELOC_NONE: ppc_reloc = R_PPC_NONE; break; |
| case BFD_RELOC_32: ppc_reloc = R_PPC_ADDR32; break; |
| case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC_ADDR24; break; |
| case BFD_RELOC_16: ppc_reloc = R_PPC_ADDR16; break; |
| case BFD_RELOC_LO16: ppc_reloc = R_PPC_ADDR16_LO; break; |
| case BFD_RELOC_HI16: ppc_reloc = R_PPC_ADDR16_HI; break; |
| case BFD_RELOC_HI16_S: ppc_reloc = R_PPC_ADDR16_HA; break; |
| case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC_ADDR14; break; |
| case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC_ADDR14_BRTAKEN; break; |
| case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC_ADDR14_BRNTAKEN; break; |
| case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC_REL24; break; |
| case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC_REL14; break; |
| case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC_REL14_BRTAKEN; break; |
| case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC_REL14_BRNTAKEN; break; |
| case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC_GOT16; break; |
| case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC_GOT16_LO; break; |
| case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC_GOT16_HI; break; |
| case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC_GOT16_HA; break; |
| case BFD_RELOC_24_PLT_PCREL: ppc_reloc = R_PPC_PLTREL24; break; |
| case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC_COPY; break; |
| case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC_GLOB_DAT; break; |
| case BFD_RELOC_PPC_LOCAL24PC: ppc_reloc = R_PPC_LOCAL24PC; break; |
| case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC_REL32; break; |
| case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC_PLT32; break; |
| case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC_PLTREL32; break; |
| case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC_PLT16_LO; break; |
| case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC_PLT16_HI; break; |
| case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC_PLT16_HA; break; |
| case BFD_RELOC_GPREL16: ppc_reloc = R_PPC_SDAREL16; break; |
| case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC_SECTOFF; break; |
| case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC_SECTOFF_LO; break; |
| case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC_SECTOFF_HI; break; |
| case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC_SECTOFF_HA; break; |
| case BFD_RELOC_CTOR: ppc_reloc = R_PPC_ADDR32; break; |
| case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC_TOC16; break; |
| case BFD_RELOC_PPC_EMB_NADDR32: ppc_reloc = R_PPC_EMB_NADDR32; break; |
| case BFD_RELOC_PPC_EMB_NADDR16: ppc_reloc = R_PPC_EMB_NADDR16; break; |
| case BFD_RELOC_PPC_EMB_NADDR16_LO: ppc_reloc = R_PPC_EMB_NADDR16_LO; break; |
| case BFD_RELOC_PPC_EMB_NADDR16_HI: ppc_reloc = R_PPC_EMB_NADDR16_HI; break; |
| case BFD_RELOC_PPC_EMB_NADDR16_HA: ppc_reloc = R_PPC_EMB_NADDR16_HA; break; |
| case BFD_RELOC_PPC_EMB_SDAI16: ppc_reloc = R_PPC_EMB_SDAI16; break; |
| case BFD_RELOC_PPC_EMB_SDA2I16: ppc_reloc = R_PPC_EMB_SDA2I16; break; |
| case BFD_RELOC_PPC_EMB_SDA2REL: ppc_reloc = R_PPC_EMB_SDA2REL; break; |
| case BFD_RELOC_PPC_EMB_SDA21: ppc_reloc = R_PPC_EMB_SDA21; break; |
| case BFD_RELOC_PPC_EMB_MRKREF: ppc_reloc = R_PPC_EMB_MRKREF; break; |
| case BFD_RELOC_PPC_EMB_RELSEC16: ppc_reloc = R_PPC_EMB_RELSEC16; break; |
| case BFD_RELOC_PPC_EMB_RELST_LO: ppc_reloc = R_PPC_EMB_RELST_LO; break; |
| case BFD_RELOC_PPC_EMB_RELST_HI: ppc_reloc = R_PPC_EMB_RELST_HI; break; |
| case BFD_RELOC_PPC_EMB_RELST_HA: ppc_reloc = R_PPC_EMB_RELST_HA; break; |
| case BFD_RELOC_PPC_EMB_BIT_FLD: ppc_reloc = R_PPC_EMB_BIT_FLD; break; |
| case BFD_RELOC_PPC_EMB_RELSDA: ppc_reloc = R_PPC_EMB_RELSDA; break; |
| case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC_GNU_VTINHERIT; break; |
| case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC_GNU_VTENTRY; break; |
| } |
| |
| return ppc_elf_howto_table[(int) ppc_reloc]; |
| }; |
| |
| /* Set the howto pointer for a PowerPC ELF reloc. */ |
| |
| static void |
| ppc_elf_info_to_howto (abfd, cache_ptr, dst) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| arelent *cache_ptr; |
| Elf32_Internal_Rela *dst; |
| { |
| if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| /* Initialize howto table if needed. */ |
| ppc_elf_howto_init (); |
| |
| BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); |
| cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; |
| } |
| |
| /* Handle the R_PPC_ADDR16_HA reloc. */ |
| |
| static bfd_reloc_status_type |
| ppc_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section, |
| output_bfd, error_message) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data ATTRIBUTE_UNUSED; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message ATTRIBUTE_UNUSED; |
| { |
| bfd_vma relocation; |
| |
| if (output_bfd != NULL) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (reloc_entry->address > input_section->_cooked_size) |
| return bfd_reloc_outofrange; |
| |
| if (bfd_is_com_section (symbol->section)) |
| relocation = 0; |
| else |
| relocation = symbol->value; |
| |
| relocation += symbol->section->output_section->vma; |
| relocation += symbol->section->output_offset; |
| relocation += reloc_entry->addend; |
| |
| reloc_entry->addend += (relocation & 0x8000) << 1; |
| |
| return bfd_reloc_continue; |
| } |
| |
| /* Function to set whether a module needs the -mrelocatable bit set. */ |
| |
| static boolean |
| ppc_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; |
| } |
| |
| /* Copy backend specific data from one object module to another */ |
| static boolean |
| ppc_elf_copy_private_bfd_data (ibfd, obfd) |
| bfd *ibfd; |
| bfd *obfd; |
| { |
| if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| return true; |
| |
| BFD_ASSERT (!elf_flags_init (obfd) |
| || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); |
| |
| elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
| elf_flags_init (obfd) = true; |
| return true; |
| } |
| |
| /* Merge backend specific data from an object file to the output |
| object file when linking */ |
| static boolean |
| ppc_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 (_bfd_generic_verify_endian_match (ibfd, obfd) == false) |
| 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_get_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_get_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_get_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 |
| ppc_elf_section_from_shdr (abfd, hdr, name) |
| bfd *abfd; |
| Elf32_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; |
| } |
| |
| /* Set up any other section flags and such that may be necessary. */ |
| |
| static boolean |
| ppc_elf_fake_sections (abfd, shdr, asect) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| Elf32_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; |
| } |
| |
| /* Create a special linker section */ |
| static elf_linker_section_t * |
| ppc_elf_create_linker_section (abfd, info, which) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| enum elf_linker_section_enum which; |
| { |
| bfd *dynobj = elf_hash_table (info)->dynobj; |
| elf_linker_section_t *lsect; |
| |
| /* Record the first bfd section that needs the special section */ |
| if (!dynobj) |
| dynobj = elf_hash_table (info)->dynobj = abfd; |
| |
| /* If this is the first time, create the section */ |
| lsect = elf_linker_section (dynobj, which); |
| if (!lsect) |
| { |
| elf_linker_section_t defaults; |
| static elf_linker_section_t zero_section; |
| |
| defaults = zero_section; |
| defaults.which = which; |
| defaults.hole_written_p = false; |
| defaults.alignment = 2; |
| |
| /* Both of these sections are (technically) created by the user |
| putting data in them, so they shouldn't be marked |
| SEC_LINKER_CREATED. |
| |
| The linker creates them so it has somewhere to attach their |
| respective symbols. In fact, if they were empty it would |
| be OK to leave the symbol set to 0 (or any random number), because |
| the appropriate register should never be used. */ |
| defaults.flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY); |
| |
| switch (which) |
| { |
| default: |
| (*_bfd_error_handler) (_("%s: Unknown special linker type %d"), |
| bfd_get_filename (abfd), |
| (int) which); |
| |
| bfd_set_error (bfd_error_bad_value); |
| return (elf_linker_section_t *) 0; |
| |
| case LINKER_SECTION_SDATA: /* .sdata/.sbss section */ |
| defaults.name = ".sdata"; |
| defaults.rel_name = ".rela.sdata"; |
| defaults.bss_name = ".sbss"; |
| defaults.sym_name = "_SDA_BASE_"; |
| defaults.sym_offset = 32768; |
| break; |
| |
| case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */ |
| defaults.name = ".sdata2"; |
| defaults.rel_name = ".rela.sdata2"; |
| defaults.bss_name = ".sbss2"; |
| defaults.sym_name = "_SDA2_BASE_"; |
| defaults.sym_offset = 32768; |
| defaults.flags |= SEC_READONLY; |
| break; |
| } |
| |
| lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults); |
| } |
| |
| return lsect; |
| } |
| |
| /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we |
| need to bump up the number of section headers. */ |
| |
| static int |
| ppc_elf_additional_program_headers (abfd) |
| bfd *abfd; |
| { |
| asection *s; |
| int ret; |
| |
| ret = 0; |
| |
| s = bfd_get_section_by_name (abfd, ".interp"); |
| if (s != NULL) |
| ++ret; |
| |
| s = bfd_get_section_by_name (abfd, ".sbss2"); |
| if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) |
| ++ret; |
| |
| s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); |
| if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) |
| ++ret; |
| |
| return ret; |
| } |
| |
| /* Modify the segment map if needed. */ |
| |
| static boolean |
| ppc_elf_modify_segment_map (abfd) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| { |
| return true; |
| } |
| |
| /* We have to create .dynsbss and .rela.sbss here so that they get mapped |
| to output sections (just like _bfd_elf_create_dynamic_sections has |
| to create .dynbss and .rela.bss). */ |
| |
| static boolean |
| ppc_elf_create_dynamic_sections (abfd, info) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| { |
| register asection *s; |
| flagword flags; |
| |
| if (!_bfd_elf_create_dynamic_sections (abfd, info)) |
| return false; |
| |
| flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| | SEC_LINKER_CREATED); |
| |
| s = bfd_make_section (abfd, ".dynsbss"); |
| if (s == NULL |
| || ! bfd_set_section_flags (abfd, s, SEC_ALLOC)) |
| return false; |
| |
| if (! info->shared) |
| { |
| s = bfd_make_section (abfd, ".rela.sbss"); |
| if (s == NULL |
| || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) |
| || ! bfd_set_section_alignment (abfd, s, 2)) |
| return false; |
| } |
| 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 |
| ppc_elf_adjust_dynamic_symbol (info, h) |
| struct bfd_link_info *info; |
| struct elf_link_hash_entry *h; |
| { |
| bfd *dynobj = elf_hash_table (info)->dynobj; |
| asection *s; |
| unsigned int power_of_two; |
| bfd_vma plt_offset; |
| |
| #ifdef DEBUG |
| fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", h->root.root.string); |
| #endif |
| |
| /* Make sure we know what is going on here. */ |
| BFD_ASSERT (dynobj != NULL |
| && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| || h->weakdef != NULL |
| || ((h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| && (h->elf_link_hash_flags |
| & ELF_LINK_HASH_REF_REGULAR) != 0 |
| && (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| |
| /* If this is a function, put it in the procedure linkage table. We |
| will fill in the contents of the procedure linkage table later, |
| when we know the address of the .got section. */ |
| if (h->type == STT_FUNC |
| || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| { |
| if (! elf_hash_table (info)->dynamic_sections_created |
| || SYMBOL_CALLS_LOCAL (info, h) |
| || (info->shared && h->plt.refcount <= 0)) |
| { |
| /* A PLT entry is not required/allowed when: |
| |
| 1. We are not using ld.so; because then the PLT entry |
| can't be set up, so we can't use one. |
| |
| 2. We know for certain that a call to this symbol |
| will go to this object. |
| |
| 3. GC has rendered the entry unused. |
| Note, however, that in an executable all references to the |
| symbol go to the PLT, so we can't turn it off in that case. |
| ??? The correct thing to do here is to reference count |
| all uses of the symbol, not just those to the GOT or PLT. */ |
| h->plt.offset = (bfd_vma) -1; |
| h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| return true; |
| } |
| |
| /* Make sure this symbol is output as a dynamic symbol. */ |
| if (h->dynindx == -1) |
| { |
| if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| return false; |
| } |
| BFD_ASSERT (h->dynindx != -1); |
| |
| s = bfd_get_section_by_name (dynobj, ".plt"); |
| BFD_ASSERT (s != NULL); |
| |
| /* If this is the first .plt entry, make room for the special |
| first entry. */ |
| if (s->_raw_size == 0) |
| s->_raw_size += PLT_INITIAL_ENTRY_SIZE; |
| |
| /* The PowerPC PLT is actually composed of two parts, the first part |
| is 2 words (for a load and a jump), and then there is a remaining |
| word available at the end. */ |
| plt_offset = (PLT_INITIAL_ENTRY_SIZE |
| + (PLT_SLOT_SIZE |
| * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) |
| / PLT_ENTRY_SIZE))); |
| |
| /* If this symbol is not defined in a regular file, and we are |
| not generating a shared library, then set the symbol to this |
| location in the .plt. This is required to make function |
| pointers compare as equal between the normal executable and |
| the shared library. */ |
| if (! info->shared |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| { |
| h->root.u.def.section = s; |
| h->root.u.def.value = plt_offset; |
| } |
| |
| h->plt.offset = plt_offset; |
| |
| /* Make room for this entry. After the 8192nd entry, room |
| for two entries is allocated. */ |
| if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE |
| >= PLT_NUM_SINGLE_ENTRIES) |
| s->_raw_size += 2 * PLT_ENTRY_SIZE; |
| else |
| s->_raw_size += PLT_ENTRY_SIZE; |
| |
| /* We also need to make an entry in the .rela.plt section. */ |
| s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| BFD_ASSERT (s != NULL); |
| s->_raw_size += sizeof (Elf32_External_Rela); |
| |
| return true; |
| } |
| |
| /* 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; |
| |
| /* 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. |
| |
| Of course, if the symbol is sufficiently small, we must instead |
| allocate it in .sbss. FIXME: It would be better to do this if and |
| only if there were actually SDAREL relocs for that symbol. */ |
| |
| if (h->size <= elf_gp_size (dynobj)) |
| s = bfd_get_section_by_name (dynobj, ".dynsbss"); |
| else |
| s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| BFD_ASSERT (s != NULL); |
| |
| /* 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) |
| { |
| asection *srel; |
| |
| if (h->size <= elf_gp_size (dynobj)) |
| srel = bfd_get_section_by_name (dynobj, ".rela.sbss"); |
| else |
| srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| BFD_ASSERT (srel != NULL); |
| srel->_raw_size += sizeof (Elf32_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->_raw_size = BFD_ALIGN (s->_raw_size, |
| (bfd_size_type) (1 << power_of_two)); |
| if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| { |
| if (! bfd_set_section_alignment (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; |
| } |
| |
| /* Set the sizes of the dynamic sections. */ |
| |
| static boolean |
| ppc_elf_size_dynamic_sections (output_bfd, info) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| { |
| bfd *dynobj; |
| asection *s; |
| boolean plt; |
| boolean relocs; |
| boolean reltext; |
| |
| #ifdef DEBUG |
| fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); |
| #endif |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| BFD_ASSERT (dynobj != NULL); |
| |
| if (elf_hash_table (info)->dynamic_sections_created) |
| { |
| /* Set the contents of the .interp section to the interpreter. */ |
| if (! info->shared) |
| { |
| s = bfd_get_section_by_name (dynobj, ".interp"); |
| BFD_ASSERT (s != NULL); |
| s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| } |
| } |
| else |
| { |
| /* We may have created entries in the .rela.got, .rela.sdata, and |
| .rela.sdata2 sections. However, if we are not creating the |
| dynamic sections, we will not actually use these entries. Reset |
| the size of .rela.got, et al, which will cause it to get |
| stripped from the output file below. */ |
| static char *rela_sections[] = { ".rela.got", ".rela.sdata", |
| ".rela.sdata2", ".rela.sbss", |
| (char *) 0 }; |
| char **p; |
| |
| for (p = rela_sections; *p != (char *) 0; p++) |
| { |
| s = bfd_get_section_by_name (dynobj, *p); |
| if (s != NULL) |
| s->_raw_size = 0; |
| } |
| } |
| |
| /* The check_relocs and adjust_dynamic_symbol entry points have |
| determined the sizes of the various dynamic sections. Allocate |
| memory for them. */ |
| plt = false; |
| relocs = false; |
| reltext = false; |
| for (s = dynobj->sections; s != NULL; s = s->next) |
| { |
| const char *name; |
| boolean strip; |
| |
| if ((s->flags & SEC_LINKER_CREATED) == 0) |
| continue; |
| |
| /* It's OK to base decisions on the section name, because none |
| of the dynobj section names depend upon the input files. */ |
| name = bfd_get_section_name (dynobj, s); |
| |
| strip = false; |
| |
| if (strcmp (name, ".plt") == 0) |
| { |
| if (s->_raw_size == 0) |
| { |
| /* Strip this section if we don't need it; see the |
| comment below. */ |
| strip = true; |
| } |
| else |
| { |
| /* Remember whether there is a PLT. */ |
| plt = true; |
| } |
| } |
| else if (strncmp (name, ".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. */ |
| strip = true; |
| } |
| else |
| { |
| asection *target; |
| const char *outname; |
| |
| /* Remember whether there are any relocation sections. */ |
| relocs = true; |
| |
| /* If this relocation section applies to a read only |
| section, then we probably need a DT_TEXTREL entry. */ |
| outname = bfd_get_section_name (output_bfd, |
| s->output_section); |
| target = bfd_get_section_by_name (output_bfd, outname + 5); |
| if (target != NULL |
| && (target->flags & SEC_READONLY) != 0 |
| && (target->flags & SEC_ALLOC) != 0) |
| reltext = 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 if (strcmp (name, ".got") != 0 |
| && strcmp (name, ".sdata") != 0 |
| && strcmp (name, ".sdata2") != 0) |
| { |
| /* It's not one of our sections, so don't allocate space. */ |
| continue; |
| } |
| |
| if (strip) |
| { |
| _bfd_strip_section_from_output (info, s); |
| continue; |
| } |
| |
| /* Allocate memory for the section contents. */ |
| s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| if (s->contents == NULL && s->_raw_size != 0) |
| return false; |
| } |
| |
| if (elf_hash_table (info)->dynamic_sections_created) |
| { |
| /* Add some entries to the .dynamic section. We fill in the |
| values later, in ppc_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. */ |
| if (! info->shared) |
| { |
| if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) |
| return false; |
| } |
| |
| if (plt) |
| { |
| if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) |
| || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) |
| || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA) |
| || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) |
| return false; |
| } |
| |
| if (relocs) |
| { |
| if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0) |
| || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0) |
| || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT, |
| sizeof (Elf32_External_Rela))) |
| return false; |
| } |
| |
| if (reltext) |
| { |
| if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) |
| return false; |
| info->flags |= DF_TEXTREL; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Look through the relocs for a section during the first phase, and |
| allocate space in the global offset table or procedure linkage |
| table. */ |
| |
| static boolean |
| ppc_elf_check_relocs (abfd, info, sec, relocs) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| asection *sec; |
| const Elf_Internal_Rela *relocs; |
| { |
| bfd *dynobj; |
| 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; |
| bfd_signed_vma *local_got_refcounts; |
| elf_linker_section_t *sdata; |
| elf_linker_section_t *sdata2; |
| asection *sreloc; |
| asection *sgot = NULL; |
| asection *srelgot = NULL; |
| |
| if (info->relocateable) |
| return true; |
| |
| #ifdef DEBUG |
| fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n", |
| bfd_get_section_name (abfd, sec), |
| bfd_get_filename (abfd)); |
| #endif |
| |
| /* Create the linker generated sections all the time so that the |
| special symbols are created. */ |
| |
| if ((sdata = elf_linker_section (abfd, LINKER_SECTION_SDATA)) == NULL) |
| { |
| sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA); |
| if (!sdata) |
| return false; |
| } |
| |
| if ((sdata2 = elf_linker_section (abfd, LINKER_SECTION_SDATA2)) == NULL) |
| { |
| sdata2 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA2); |
| if (!sdata2) |
| return false; |
| } |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| local_got_refcounts = elf_local_got_refcounts (abfd); |
| |
| sym_hashes = elf_sym_hashes (abfd); |
| sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
| if (!elf_bad_symtab (abfd)) |
| sym_hashes_end -= symtab_hdr->sh_info; |
| |
| sreloc = NULL; |
| |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; rel++) |
| { |
| unsigned long r_symndx; |
| struct elf_link_hash_entry *h; |
| |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| if (r_symndx < symtab_hdr->sh_info) |
| h = NULL; |
| else |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| |
| /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. |
| This shows up in particular in an R_PPC_ADDR32 in the eabi |
| startup code. */ |
| if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| { |
| if (sgot == NULL) |
| { |
| if (dynobj == NULL) |
| elf_hash_table (info)->dynobj = dynobj = abfd; |
| if (! _bfd_elf_create_got_section (dynobj, info)) |
| return false; |
| sgot = bfd_get_section_by_name (dynobj, ".got"); |
| BFD_ASSERT (sgot != NULL); |
| } |
| } |
| |
| switch (ELF32_R_TYPE (rel->r_info)) |
| { |
| /* GOT16 relocations */ |
| case R_PPC_GOT16: |
| case R_PPC_GOT16_LO: |
| case R_PPC_GOT16_HI: |
| case R_PPC_GOT16_HA: |
| /* This symbol requires a global offset table entry. */ |
| |
| if (sgot == NULL) |
| { |
| if (dynobj == NULL) |
| elf_hash_table (info)->dynobj = dynobj = abfd; |
| if (! _bfd_elf_create_got_section (dynobj, info)) |
| return false; |
| sgot = bfd_get_section_by_name (dynobj, ".got"); |
| BFD_ASSERT (sgot != NULL); |
| } |
| |
| if (srelgot == NULL |
| && (h != NULL || info->shared)) |
| { |
| srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| if (srelgot == NULL) |
| { |
| srelgot = bfd_make_section (dynobj, ".rela.got"); |
| if (srelgot == NULL |
| || ! bfd_set_section_flags (dynobj, srelgot, |
| (SEC_ALLOC |
| | SEC_LOAD |
| | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY |
| | SEC_LINKER_CREATED |
| | SEC_READONLY)) |
| || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| return false; |
| } |
| } |
| |
| if (h != NULL) |
| { |
| if (h->got.refcount == -1) |
| { |
| /* Make sure this symbol is output as a dynamic symbol. */ |
| if (h->dynindx == -1) |
| if (!bfd_elf32_link_record_dynamic_symbol (info, h)) |
| return false; |
| |
| /* Allocate space in the .got. */ |
| sgot->_raw_size += 4; |
| /* Allocate relocation space. */ |
| srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| |
| h->got.refcount = 1; |
| } |
| else |
| h->got.refcount++; |
| } |
| else |
| { |
| /* This is a global offset table entry for a local symbol. */ |
| if (local_got_refcounts == NULL) |
| { |
| size_t size; |
| |
| size = symtab_hdr->sh_info * sizeof (bfd_signed_vma); |
| local_got_refcounts = (bfd_signed_vma *) |
| bfd_alloc (abfd, size); |
| if (local_got_refcounts == NULL) |
| return false; |
| elf_local_got_refcounts (abfd) = local_got_refcounts; |
| memset (local_got_refcounts, -1, size); |
| } |
| if (local_got_refcounts[r_symndx] == -1) |
| { |
| sgot->_raw_size += 4; |
| |
| /* If we are generating a shared object, we need to |
| output a R_PPC_RELATIVE reloc so that the |
| dynamic linker can adjust this GOT entry. */ |
| if (info->shared) |
| srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| |
| local_got_refcounts[r_symndx] = 1; |
| } |
| else |
| local_got_refcounts[r_symndx]++; |
| } |
| break; |
| |
| /* Indirect .sdata relocation */ |
| case R_PPC_EMB_SDAI16: |
| if (info->shared) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: relocation %s cannot be used when making a shared object"), |
| bfd_get_filename (abfd), "R_PPC_EMB_SDAI16")); |
| return false; |
| } |
| |
| if (srelgot == NULL && (h != NULL || info->shared)) |
| { |
| srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| if (srelgot == NULL) |
| { |
| srelgot = bfd_make_section (dynobj, ".rela.got"); |
| if (srelgot == NULL |
| || ! bfd_set_section_flags (dynobj, srelgot, |
| (SEC_ALLOC |
| | SEC_LOAD |
| | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY |
| | SEC_LINKER_CREATED |
| | SEC_READONLY)) |
| || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| return false; |
| } |
| } |
| |
| if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata, h, rel)) |
| return false; |
| |
| break; |
| |
| /* Indirect .sdata2 relocation */ |
| case R_PPC_EMB_SDA2I16: |
| if (info->shared) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: relocation %s cannot be used when making a shared object"), |
| bfd_get_filename (abfd), "R_PPC_EMB_SDA2I16")); |
| return false; |
| } |
| |
| if (srelgot == NULL && (h != NULL || info->shared)) |
| { |
| srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| if (srelgot == NULL) |
| { |
| srelgot = bfd_make_section (dynobj, ".rela.got"); |
| if (srelgot == NULL |
| || ! bfd_set_section_flags (dynobj, srelgot, |
| (SEC_ALLOC |
| | SEC_LOAD |
| | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY |
| | SEC_LINKER_CREATED |
| | SEC_READONLY)) |
| || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| return false; |
| } |
| } |
| |
| if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata2, h, rel)) |
| return false; |
| |
| break; |
| |
| case R_PPC_SDAREL16: |
| case R_PPC_EMB_SDA2REL: |
| case R_PPC_EMB_SDA21: |
| if (info->shared) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: relocation %s cannot be used when making a shared object"), |
| bfd_get_filename (abfd), |
| ppc_elf_howto_table[(int) ELF32_R_TYPE (rel->r_info)]->name)); |
| return false; |
| } |
| break; |
| |
| case R_PPC_PLT32: |
| case R_PPC_PLTREL24: |
| case R_PPC_PLT16_LO: |
| case R_PPC_PLT16_HI: |
| case R_PPC_PLT16_HA: |
| #ifdef DEBUG |
| fprintf (stderr, "Reloc requires a PLT entry\n"); |
| #endif |
| /* 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; |
| } |
| |
| /* Make sure this symbol is output as a dynamic symbol. */ |
| if (h->dynindx == -1) |
| { |
| if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| return false; |
| } |
| if (h->plt.refcount == -1) |
| { |
| h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| h->plt.refcount = 1; |
| } |
| else |
| h->plt.refcount++; |
| break; |
| |
| /* The following relocations don't need to propagate the |
| relocation if linking a shared object since they are |
| section relative. */ |
| case R_PPC_SECTOFF: |
| case R_PPC_SECTOFF_LO: |
| case R_PPC_SECTOFF_HI: |
| case R_PPC_SECTOFF_HA: |
| break; |
| |
| /* This refers only to functions defined in the shared library */ |
| case R_PPC_LOCAL24PC: |
| break; |
| |
| /* This relocation describes the C++ object vtable hierarchy. |
| Reconstruct it for later use during GC. */ |
| case R_PPC_GNU_VTINHERIT: |
| if (!_bfd_elf32_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_PPC_GNU_VTENTRY: |
| if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| return false; |
| break; |
| |
| /* When creating a shared object, we must copy these |
| relocs into the output file. We create a reloc |
| section in dynobj and make room for the reloc. */ |
| case R_PPC_REL24: |
| case R_PPC_REL14: |
| case R_PPC_REL14_BRTAKEN: |
| case R_PPC_REL14_BRNTAKEN: |
| case R_PPC_REL32: |
| if (h == NULL |
| || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| || SYMBOL_REFERENCES_LOCAL (info, h)) |
| break; |
| /* fall through */ |
| |
| default: |
| if (info->shared) |
| { |
| #ifdef DEBUG |
| fprintf (stderr, "ppc_elf_check_relocs need to create relocation for %s\n", |
| (h && h->root.root.string) ? h->root.root.string : "<unknown>"); |
| #endif |
| if (sreloc == NULL) |
| { |
| const char *name; |
| |
| 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; |
| |
| BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| && strcmp (bfd_get_section_name (abfd, sec), |
| name + 5) == 0); |
| |
| 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, 2)) |
| return false; |
| } |
| } |
| |
| sreloc->_raw_size += sizeof (Elf32_External_Rela); |
| |
| /* FIXME: We should here do what the m68k and i386 |
| backends do: if the reloc is pc-relative, record it |
| in case it turns out that the reloc is unnecessary |
| because the symbol is forced local by versioning or |
| we are linking with -Bdynamic. Fortunately this |
| case is not frequent. */ |
| } |
| |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Return the section that should be marked against GC for a given |
| relocation. */ |
| |
| static asection * |
| ppc_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) |
| { |
| switch (ELF32_R_TYPE (rel->r_info)) |
| { |
| case R_PPC_GNU_VTINHERIT: |
| case R_PPC_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 |
| { |
| if (!(elf_bad_symtab (abfd) |
| && ELF_ST_BIND (sym->st_info) != STB_LOCAL) |
| && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) |
| && sym->st_shndx != SHN_COMMON)) |
| { |
| return bfd_section_from_elf_index (abfd, sym->st_shndx); |
| } |
| } |
| |
| return NULL; |
| } |
| |
| /* Update the got entry reference counts for the section being removed. */ |
| |
| static boolean |
| ppc_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; |
| unsigned long r_symndx; |
| struct elf_link_hash_entry *h; |
| |
| 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++) |
| switch (ELF32_R_TYPE (rel->r_info)) |
| { |
| case R_PPC_GOT16: |
| case R_PPC_GOT16_LO: |
| case R_PPC_GOT16_HI: |
| case R_PPC_GOT16_HA: |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| 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 != NULL) |
| { |
| if (local_got_refcounts[r_symndx] > 0) |
| local_got_refcounts[r_symndx]--; |
| } |
| break; |
| |
| case R_PPC_PLT32: |
| case R_PPC_PLTREL24: |
| case R_PPC_PLT16_LO: |
| case R_PPC_PLT16_HI: |
| case R_PPC_PLT16_HA: |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| 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; |
| |
| default: |
| break; |
| } |
| |
| return true; |
| } |
| |
| /* Hook called by the linker routine which adds symbols from an object |
| file. We use it to put .comm items in .sbss, and not .bss. */ |
| |
| static boolean |
| ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| const Elf_Internal_Sym *sym; |
| const char **namep ATTRIBUTE_UNUSED; |
| flagword *flagsp ATTRIBUTE_UNUSED; |
| asection **secp; |
| bfd_vma *valp; |
| { |
| if (sym->st_shndx == SHN_COMMON |
| && !info->relocateable |
| && sym->st_size <= (bfd_vma) bfd_get_gp_size (abfd)) |
| { |
| /* Common symbols less than or equal to -G nn bytes are automatically |
| put into .sdata. */ |
| elf_linker_section_t *sdata |
| = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA); |
| |
| if (!sdata->bss_section) |
| { |
| /* We don't go through bfd_make_section, because we don't |
| want to attach this common section to DYNOBJ. The linker |
| will move the symbols to the appropriate output section |
| when it defines common symbols. */ |
| sdata->bss_section = ((asection *) |
| bfd_zalloc (abfd, sizeof (asection))); |
| if (sdata->bss_section == NULL) |
| return false; |
| sdata->bss_section->name = sdata->bss_name; |
| sdata->bss_section->flags = SEC_IS_COMMON; |
| sdata->bss_section->output_section = sdata->bss_section; |
| sdata->bss_section->symbol = |
| (asymbol *) bfd_zalloc (abfd, sizeof (asymbol)); |
| sdata->bss_section->symbol_ptr_ptr = |
| (asymbol **) bfd_zalloc (abfd, sizeof (asymbol *)); |
| if (sdata->bss_section->symbol == NULL |
| || sdata->bss_section->symbol_ptr_ptr == NULL) |
| return false; |
| sdata->bss_section->symbol->name = sdata->bss_name; |
| sdata->bss_section->symbol->flags = BSF_SECTION_SYM; |
| sdata->bss_section->symbol->section = sdata->bss_section; |
| *sdata->bss_section->symbol_ptr_ptr = sdata->bss_section->symbol; |
| } |
| |
| *secp = sdata->bss_section; |
| *valp = sym->st_size; |
| } |
| |
| return true; |
| } |
| |
| /* Finish up dynamic symbol handling. We set the contents of various |
| dynamic sections here. */ |
| |
| static boolean |
| ppc_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; |
| { |
| bfd *dynobj; |
| |
| #ifdef DEBUG |
| fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", |
| h->root.root.string); |
| #endif |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| BFD_ASSERT (dynobj != NULL); |
| |
| if (h->plt.offset != (bfd_vma) -1) |
| { |
| asection *splt; |
| asection *srela; |
| Elf_Internal_Rela rela; |
| bfd_vma reloc_index; |
| |
| #ifdef DEBUG |
| fprintf (stderr, ", plt_offset = %d", h->plt.offset); |
| #endif |
| |
| /* This symbol has an entry in the procedure linkage table. Set |
| it up. */ |
| |
| BFD_ASSERT (h->dynindx != -1); |
| |
| splt = bfd_get_section_by_name (dynobj, ".plt"); |
| srela = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| BFD_ASSERT (splt != NULL && srela != NULL); |
| |
| /* We don't need to fill in the .plt. The ppc dynamic linker |
| will fill it in. */ |
| |
| /* Fill in the entry in the .rela.plt section. */ |
| rela.r_offset = (splt->output_section->vma |
| + splt->output_offset |
| + h->plt.offset); |
| rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); |
| rela.r_addend = 0; |
| |
| reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE; |
| if (reloc_index > PLT_NUM_SINGLE_ENTRIES) |
| reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; |
| bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| ((Elf32_External_Rela *) srela->contents |
| + reloc_index)); |
| |
| if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| { |
| /* Mark the symbol as undefined, rather than as defined in |
| the .plt section. Leave the value alone. */ |
| sym->st_shndx = SHN_UNDEF; |
| /* If the symbol is weak, we do need to clear the value. |
| Otherwise, the PLT entry would provide a definition for |
| the symbol even if the symbol wasn't defined anywhere, |
| and so the symbol would never be NULL. */ |
| if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) |
| == 0) |
| sym->st_value = 0; |
| } |
| } |
| |
| if (h->got.offset != (bfd_vma) -1) |
| { |
| asection *sgot; |
| asection *srela; |
| Elf_Internal_Rela rela; |
| |
| /* This symbol has an entry in the global offset table. Set it |
| up. */ |
| |
| sgot = bfd_get_section_by_name (dynobj, ".got"); |
| srela = bfd_get_section_by_name (dynobj, ".rela.got"); |
| BFD_ASSERT (sgot != NULL && srela != NULL); |
| |
| rela.r_offset = (sgot->output_section->vma |
| + sgot->output_offset |
| + (h->got.offset &~ 1)); |
| |
| /* If this is a -Bsymbolic link, and the symbol is defined |
| locally, 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 |
| && SYMBOL_REFERENCES_LOCAL (info, h)) |
| { |
| rela.r_info = ELF32_R_INFO (0, R_PPC_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_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
| rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_GLOB_DAT); |
| rela.r_addend = 0; |
| } |
| |
| bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| ((Elf32_External_Rela *) srela->contents |
| + srela->reloc_count)); |
| ++srela->reloc_count; |
| } |
| |
| if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| { |
| asection *s; |
| Elf_Internal_Rela rela; |
| |
| /* This symbols needs a copy reloc. Set it up. */ |
| |
| #ifdef DEBUG |
| fprintf (stderr, ", copy"); |
| #endif |
| |
| BFD_ASSERT (h->dynindx != -1); |
| |
| if (h->size <= elf_gp_size (dynobj)) |
| s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| ".rela.sbss"); |
| else |
| s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| ".rela.bss"); |
| BFD_ASSERT (s != NULL); |
| |
| 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 = ELF32_R_INFO (h->dynindx, R_PPC_COPY); |
| rela.r_addend = 0; |
| bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| ((Elf32_External_Rela *) s->contents |
| + s->reloc_count)); |
| ++s->reloc_count; |
| } |
| |
| #ifdef DEBUG |
| fprintf (stderr, "\n"); |
| #endif |
| |
| /* Mark some specially defined symbols as absolute. */ |
| if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) |
| sym->st_shndx = SHN_ABS; |
| |
| return true; |
| } |
| |
| /* Finish up the dynamic sections. */ |
| |
| static boolean |
| ppc_elf_finish_dynamic_sections (output_bfd, info) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| { |
| asection *sdyn; |
| bfd *dynobj = elf_hash_table (info)->dynobj; |
| asection *sgot = bfd_get_section_by_name (dynobj, ".got"); |
| |
| #ifdef DEBUG |
| fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); |
| #endif |
| |
| sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| |
| if (elf_hash_table (info)->dynamic_sections_created) |
| { |
| asection *splt; |
| Elf32_External_Dyn *dyncon, *dynconend; |
| |
| splt = bfd_get_section_by_name (dynobj, ".plt"); |
| BFD_ASSERT (splt != NULL && sdyn != NULL); |
| |
| dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| for (; dyncon < dynconend; dyncon++) |
| { |
| Elf_Internal_Dyn dyn; |
| const char *name; |
| boolean size; |
| |
| bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| |
| switch (dyn.d_tag) |
| { |
| case DT_PLTGOT: name = ".plt"; size = false; break; |
| case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; |
| case DT_JMPREL: name = ".rela.plt"; size = false; break; |
| default: name = NULL; size = false; break; |
| } |
| |
| if (name != NULL) |
| { |
| asection *s; |
| |
| s = bfd_get_section_by_name (output_bfd, name); |
| if (s == NULL) |
| dyn.d_un.d_val = 0; |
| else |
| { |
| if (! size) |
| dyn.d_un.d_ptr = s->vma; |
| else |
| { |
| if (s->_cooked_size != 0) |
| dyn.d_un.d_val = s->_cooked_size; |
| else |
| dyn.d_un.d_val = s->_raw_size; |
| } |
| } |
| bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| } |
| } |
| } |
| |
| /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can |
| easily find the address of the _GLOBAL_OFFSET_TABLE_. */ |
| if (sgot) |
| { |
| unsigned char *contents = sgot->contents; |
| bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents); |
| |
| if (sdyn == NULL) |
| bfd_put_32 (output_bfd, (bfd_vma) 0, contents+4); |
| else |
| bfd_put_32 (output_bfd, |
| sdyn->output_section->vma + sdyn->output_offset, |
| contents+4); |
| |
| elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| } |
| |
| 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 |
| ppc_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; |
| { |
| Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
| bfd *dynobj = elf_hash_table (info)->dynobj; |
| elf_linker_section_t *sdata = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA) : NULL; |
| elf_linker_section_t *sdata2 = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA2) : NULL; |
| Elf_Internal_Rela *rel = relocs; |
| Elf_Internal_Rela *relend = relocs + input_section->reloc_count; |
| asection *sreloc = NULL; |
| asection *splt; |
| asection *sgot; |
| bfd_vma *local_got_offsets; |
| boolean ret = true; |
| long insn; |
| |
| #ifdef DEBUG |
| fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n", |
| bfd_get_filename (input_bfd), |
| bfd_section_name(input_bfd, input_section), |
| (long) input_section->reloc_count, |
| (info->relocateable) ? " (relocatable)" : ""); |
| #endif |
| |
| if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| /* Initialize howto table if needed. */ |
| ppc_elf_howto_init (); |
| |
| local_got_offsets = elf_local_got_offsets (input_bfd); |
| |
| splt = sgot = NULL; |
| if (dynobj != NULL) |
| { |
| splt = bfd_get_section_by_name (dynobj, ".plt"); |
| sgot = bfd_get_section_by_name (dynobj, ".got"); |
| } |
| |
| for (; rel < relend; rel++) |
| { |
| enum elf_ppc_reloc_type r_type = (enum elf_ppc_reloc_type)ELF32_R_TYPE (rel->r_info); |
| bfd_vma offset = rel->r_offset; |
| bfd_vma addend = rel->r_addend; |
| bfd_reloc_status_type r = bfd_reloc_other; |
| Elf_Internal_Sym *sym = (Elf_Internal_Sym *) 0; |
| asection *sec = (asection *) 0; |
| struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) 0; |
| const char *sym_name = (const char *) 0; |
| reloc_howto_type *howto; |
| unsigned long r_symndx; |
| bfd_vma relocation; |
| int will_become_local; |
| |
| /* Unknown relocation handling */ |
| if ((unsigned) r_type >= (unsigned) R_PPC_max |
| || !ppc_elf_howto_table[(int) r_type]) |
| { |
| (*_bfd_error_handler) (_("%s: unknown relocation type %d"), |
| bfd_get_filename (input_bfd), |
| (int) r_type); |
| |
| bfd_set_error (bfd_error_bad_value); |
| ret = false; |
| continue; |
| } |
| |
| howto = ppc_elf_howto_table[(int) r_type]; |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| |
| if (info->relocateable) |
| { |
| /* This is a relocateable 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]; |
| addend = rel->r_addend += sec->output_offset + sym->st_value; |
| } |
| } |
| |
| #ifdef DEBUG |
| fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n", |
| howto->name, |
| (int) r_type, |
| r_symndx, |
| (long) offset, |
| (long) addend); |
| #endif |
| continue; |
| } |
| |
| /* This is a final link. */ |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| sym_name = "<local symbol>"; |
| |
| relocation = (sec->output_section->vma |
| + sec->output_offset |
| + sym->st_value); |
| /* Relocs to local symbols are always resolved. */ |
| will_become_local = 1; |
| } |
| else |
| { |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| sym_name = h->root.root.string; |
| |
| /* Can this relocation be resolved immediately? */ |
| will_become_local = SYMBOL_REFERENCES_LOCAL (info, h); |
| |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| sec = h->root.u.def.section; |
| if (((r_type == R_PPC_PLT32 |
| || r_type == R_PPC_PLTREL24) |
| && splt != NULL |
| && h->plt.offset != (bfd_vma) -1) |
| || (r_type == R_PPC_LOCAL24PC |
| && sec->output_section == NULL) |
| || ((r_type == R_PPC_GOT16 |
| || r_type == R_PPC_GOT16_LO |
| || r_type == R_PPC_GOT16_HI |
| || r_type == R_PPC_GOT16_HA) |
| && elf_hash_table (info)->dynamic_sections_created |
| && (! info->shared || ! will_become_local)) |
| || (info->shared |
| && ! will_become_local |
| && ((input_section->flags & SEC_ALLOC) != 0 |
| /* Testing SEC_DEBUGGING here may be wrong. |
| It's here to avoid a crash when |
| generating a shared library with DWARF |
| debugging information. */ |
| || ((input_section->flags & SEC_DEBUGGING) != 0 |
| && (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
| && (r_type == R_PPC_ADDR32 |
| || r_type == R_PPC_ADDR24 |
| || r_type == R_PPC_ADDR16 |
| || r_type == R_PPC_ADDR16_LO |
| || r_type == R_PPC_ADDR16_HI |
| || r_type == R_PPC_ADDR16_HA |
| || r_type == R_PPC_ADDR14 |
| || r_type == R_PPC_ADDR14_BRTAKEN |
| || r_type == R_PPC_ADDR14_BRNTAKEN |
| || r_type == R_PPC_COPY |
| || r_type == R_PPC_GLOB_DAT |
| || r_type == R_PPC_JMP_SLOT |
| || r_type == R_PPC_UADDR32 |
| || r_type == R_PPC_UADDR16 |
| || r_type == R_PPC_SDAREL16 |
| || r_type == R_PPC_EMB_NADDR32 |
| || r_type == R_PPC_EMB_NADDR16 |
| || r_type == R_PPC_EMB_NADDR16_LO |
| || r_type == R_PPC_EMB_NADDR16_HI |
| || r_type == R_PPC_EMB_NADDR16_HA |
| || r_type == R_PPC_EMB_SDAI16 |
| || r_type == R_PPC_EMB_SDA2I16 |
| || r_type == R_PPC_EMB_SDA2REL |
| || r_type == R_PPC_EMB_SDA21 |
| || r_type == R_PPC_EMB_MRKREF |
| || r_type == R_PPC_EMB_BIT_FLD |
| || r_type == R_PPC_EMB_RELSDA |
| || ((r_type == R_PPC_REL24 |
| || r_type == R_PPC_REL32 |
| || r_type == R_PPC_REL14 |
| || r_type == R_PPC_REL14_BRTAKEN |
| || r_type == R_PPC_REL14_BRNTAKEN |
| || r_type == R_PPC_RELATIVE) |
| && strcmp (h->root.root.string, |
| "_GLOBAL_OFFSET_TABLE_") != 0)))) |
| { |
| /* In these cases, we don't need the relocation |
| value. We check specially because in some |
| obscure cases sec->output_section will be NULL. */ |
| relocation = 0; |
| } |
| else if (sec->output_section == NULL) |
| { |
| (*_bfd_error_handler) |
| (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"), |
| bfd_get_filename (input_bfd), h->root.root.string, |
| bfd_get_section_name (input_bfd, input_section)); |
| relocation = 0; |
| } |
| else |
| relocation = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else if (h->root.type == bfd_link_hash_undefweak) |
| relocation = 0; |
| else if (info->shared && !info->symbolic && !info->no_undefined |
| && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| relocation = 0; |
| else |
| { |
| if (! (*info->callbacks->undefined_symbol) (info, |
| h->root.root.string, |
| input_bfd, |
| input_section, |
| rel->r_offset, |
| (!info->shared |
| || info->no_undefined |
| || ELF_ST_VISIBILITY (h->other)))) |
| return false; |
| relocation = 0; |
| } |
| } |
| |
| switch ((int) r_type) |
| { |
| default: |
| (*_bfd_error_handler) (_("%s: unknown relocation type %d for symbol %s"), |
| bfd_get_filename (input_bfd), |
| (int) r_type, sym_name); |
| |
| bfd_set_error (bfd_error_bad_value); |
| ret = false; |
| continue; |
| |
| /* Relocations that need no special processing. */ |
| case (int) R_PPC_LOCAL24PC: |
| /* It makes no sense to point a local relocation |
| at a symbol not in this object. */ |
| if (h != NULL |
| && (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| && sec->output_section == NULL) |
| { |
| if (! (*info->callbacks->undefined_symbol) (info, |
| h->root.root.string, |
| input_bfd, |
| input_section, |
| rel->r_offset, |
| true)) |
| return false; |
| continue; |
| } |
| break; |
| |
| /* Relocations that may need to be propagated if this is a shared |
| object. */ |
| case (int) R_PPC_REL24: |
| case (int) R_PPC_REL32: |
| case (int) R_PPC_REL14: |
| /* If these relocations are not to a named symbol, they can be |
| handled right here, no need to bother the dynamic linker. */ |
| if (h == NULL |
| || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| || SYMBOL_REFERENCES_LOCAL (info, h)) |
| break; |
| /* fall through */ |
| |
| /* Relocations that always need to be propagated if this is a shared |
| object. */ |
| case (int) R_PPC_NONE: |
| case (int) R_PPC_ADDR32: |
| case (int) R_PPC_ADDR24: |
| case (int) R_PPC_ADDR16: |
| case (int) R_PPC_ADDR16_LO: |
| case (int) R_PPC_ADDR16_HI: |
| case (int) R_PPC_ADDR16_HA: |
| case (int) R_PPC_ADDR14: |
| case (int) R_PPC_UADDR32: |
| case (int) R_PPC_UADDR16: |
| if (info->shared) |
| { |
| Elf_Internal_Rela outrel; |
| boolean skip; |
| |
| #ifdef DEBUG |
| fprintf (stderr, "ppc_elf_relocate_section need to create relocation for %s\n", |
| (h && h->root.root.string) ? h->root.root.string : "<unknown>"); |
| #endif |
| |
| /* When generating a shared object, these relocations |
| are copied into the output file to be resolved at run |
| time. */ |
| |
| if (sreloc == NULL) |
| { |
| const char *name; |
| |
| name = (bfd_elf_string_from_elf_section |
| (input_bfd, |
| elf_elfheader (input_bfd)->e_shstrndx, |
| elf_section_data (input_section)->rel_hdr.sh_name)); |
| if (name == NULL) |
| return false; |
| |
| BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| && strcmp (bfd_get_section_name (input_bfd, |
| input_section), |
| name + 5) == 0); |
| |
| sreloc = bfd_get_section_by_name (dynobj, name); |
| BFD_ASSERT (sreloc != NULL); |
| } |
| |
| skip = false; |
| |
| if (elf_section_data (input_section)->stab_info == NULL) |
| outrel.r_offset = rel->r_offset; |
| else |
| { |
| bfd_vma off; |
| |
| off = (_bfd_stab_section_offset |
| (output_bfd, &elf_hash_table (info)->stab_info, |
| input_section, |
| &elf_section_data (input_section)->stab_info, |
| rel->r_offset)); |
| if (off == (bfd_vma) -1) |
| skip = true; |
| outrel.r_offset = off; |
| } |
| |
| outrel.r_offset += (input_section->output_section->vma |
| + input_section->output_offset); |
| |
| if (skip) |
| memset (&outrel, 0, sizeof outrel); |
| /* h->dynindx may be -1 if this symbol was marked to |
| become local. */ |
| else if (! will_become_local) |
| { |
| outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| outrel.r_addend = rel->r_addend; |
| } |
| else |
| { |
| if (r_type == R_PPC_ADDR32) |
| { |
| outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| outrel.r_addend = relocation + rel->r_addend; |
| } |
| else |
| { |
| long indx; |
| |
| if (h == NULL) |
| sec = local_sections[r_symndx]; |
| else |
| { |
| BFD_ASSERT (h->root.type == bfd_link_hash_defined |
| || (h->root.type |
| == bfd_link_hash_defweak)); |
| sec = h->root.u.def.section; |
| } |
| if (sec != NULL && bfd_is_abs_section (sec)) |
| indx = 0; |
| 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; |
| BFD_ASSERT (indx > 0); |
| #ifdef DEBUG |
| if (indx <= 0) |
| { |
| printf ("indx=%d section=%s flags=%08x name=%s\n", |
| indx, osec->name, osec->flags, |
| h->root.root.string); |
| } |
| #endif |
| } |
| |
| outrel.r_info = ELF32_R_INFO (indx, r_type); |
| outrel.r_addend = relocation + rel->r_addend; |
| } |
| } |
| |
| bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| (((Elf32_External_Rela *) |
| sreloc->contents) |
| + sreloc->reloc_count)); |
| ++sreloc->reloc_count; |
| |
| /* This reloc will be computed at runtime, so there's no |
| need to do anything now, unless this is a RELATIVE |
| reloc in an unallocated section. */ |
| if (skip |
| || (input_section->flags & SEC_ALLOC) != 0 |
| || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE) |
| continue; |
| } |
| |
| /* Arithmetic adjust relocations that aren't going into a |
| shared object. */ |
| if (r_type == R_PPC_ADDR16_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). */ |
| && sec != NULL) |
| { |
| addend += ((relocation + addend) & 0x8000) << 1; |
| } |
| break; |
| |
| /* branch taken prediction relocations */ |
| case (int) R_PPC_ADDR14_BRTAKEN: |
| case (int) R_PPC_REL14_BRTAKEN: |
| insn = bfd_get_32 (output_bfd, contents + offset); |
| if ((relocation - offset) & 0x8000) |
| insn &= ~BRANCH_PREDICT_BIT; |
| else |
| insn |= BRANCH_PREDICT_BIT; |
| bfd_put_32 (output_bfd, insn, contents + offset); |
| break; |
| |
| /* branch not taken predicition relocations */ |
| case (int) R_PPC_ADDR14_BRNTAKEN: |
| case (int) R_PPC_REL14_BRNTAKEN: |
| insn = bfd_get_32 (output_bfd, contents + offset); |
| if ((relocation - offset) & 0x8000) |
| insn |= BRANCH_PREDICT_BIT; |
| else |
| insn &= ~BRANCH_PREDICT_BIT; |
| bfd_put_32 (output_bfd, insn, contents + offset); |
| break; |
| |
| /* GOT16 relocations */ |
| case (int) R_PPC_GOT16: |
| case (int) R_PPC_GOT16_LO: |
| case (int) R_PPC_GOT16_HI: |
| case (int) R_PPC_GOT16_HA: |
| /* Relocation is to the entry for this symbol in the global |
| offset table. */ |
| BFD_ASSERT (sgot != NULL); |
| |
| if (h != NULL) |
| { |
| bfd_vma off; |
| |
| off = h->got.offset; |
| BFD_ASSERT (off != (bfd_vma) -1); |
| |
| if (! elf_hash_table (info)->dynamic_sections_created |
| || (info->shared |
| && SYMBOL_REFERENCES_LOCAL (info, h))) |
| { |
| /* This is actually a static link, or it is a |
| -Bsymbolic link and the symbol is defined |
| locally. We must initialize this entry in the |
| global offset table. Since the offset must |
| always be a multiple of 4, we use the least |
| significant bit to record whether we have |
| initialized it already. |
| |
| When doing a dynamic link, we create a .rela.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_32 (output_bfd, relocation, |
| sgot->contents + off); |
| h->got.offset |= 1; |
| } |
| } |
| |
| relocation = sgot->output_offset + off - 4; |
| } |
| else |
| { |
| bfd_vma off; |
| |
| BFD_ASSERT (local_got_offsets != NULL |
| && local_got_offsets[r_symndx] != (bfd_vma) -1); |
| |
| off = local_got_offsets[r_symndx]; |
| |
| /* The offset must always be a multiple of 4. We use |
| the least significant bit to record whether we have |
| already processed this entry. */ |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| |
| if (info->shared) |
| { |
| asection *srelgot; |
| Elf_Internal_Rela outrel; |
| |
| /* We need to generate a R_PPC_RELATIVE reloc |
| for the dynamic linker. */ |
| srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| BFD_ASSERT (srelgot != NULL); |
| |
| outrel.r_offset = (sgot->output_section->vma |
| + sgot->output_offset |
| + off); |
| outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| outrel.r_addend = relocation; |
| bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| (((Elf32_External_Rela *) |
| srelgot->contents) |
| + srelgot->reloc_count)); |
| ++srelgot->reloc_count; |
| } |
| |
| local_got_offsets[r_symndx] |= 1; |
| } |
| |
| relocation = sgot->output_offset + off - 4; |
| } |
| break; |
| |
| /* Indirect .sdata relocation */ |
| case (int) R_PPC_EMB_SDAI16: |
| BFD_ASSERT (sdata != NULL); |
| relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info, |
| sdata, h, relocation, rel, |
| R_PPC_RELATIVE); |
| break; |
| |
| /* Indirect .sdata2 relocation */ |
| case (int) R_PPC_EMB_SDA2I16: |
| BFD_ASSERT (sdata2 != NULL); |
| relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info, |
| sdata2, h, relocation, rel, |
| R_PPC_RELATIVE); |
| break; |
| |
| /* Handle the TOC16 reloc. We want to use the offset within the .got |
| section, not the actual VMA. This is appropriate when generating |
| an embedded ELF object, for which the .got section acts like the |
| AIX .toc section. */ |
| case (int) R_PPC_TOC16: /* phony GOT16 relocations */ |
| BFD_ASSERT (sec != (asection *) 0); |
| BFD_ASSERT (bfd_is_und_section (sec) |
| || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0 |
| || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0) |
| |
| addend -= sec->output_section->vma + sec->output_offset + 0x8000; |
| break; |
| |
| case (int) R_PPC_PLTREL24: |
| /* Relocation is to the entry for this symbol in the |
| procedure linkage table. */ |
| BFD_ASSERT (h != NULL); |
| |
| if (h->plt.offset == (bfd_vma) -1 |
| || 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 = (splt->output_section->vma |
| + splt->output_offset |
| + h->plt.offset); |
| break; |
| |
| /* relocate against _SDA_BASE_ */ |
| case (int) R_PPC_SDAREL16: |
| { |
| const char *name; |
| |
| BFD_ASSERT (sec != (asection *) 0); |
| name = bfd_get_section_name (abfd, sec->output_section); |
| if (strcmp (name, ".sdata") != 0 |
| && strcmp (name, ".sbss") != 0) |
| { |
| (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"), |
| bfd_get_filename (input_bfd), |
| sym_name, |
| ppc_elf_howto_table[(int) r_type]->name, |
| name); |
| } |
| addend -= (sdata->sym_hash->root.u.def.value |
| + sdata->sym_hash->root.u.def.section->output_section->vma |
| + sdata->sym_hash->root.u.def.section->output_offset); |
| } |
| break; |
| |
| /* relocate against _SDA2_BASE_ */ |
| case (int) R_PPC_EMB_SDA2REL: |
| { |
| const char *name; |
| |
| BFD_ASSERT (sec != (asection *) 0); |
| name = bfd_get_section_name (abfd, sec->output_section); |
| if (strcmp (name, ".sdata2") != 0 && strcmp (name, ".sbss2") != 0) |
| { |
| (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"), |
| bfd_get_filename (input_bfd), |
| sym_name, |
| ppc_elf_howto_table[(int) r_type]->name, |
| name); |
| |
| bfd_set_error (bfd_error_bad_value); |
| ret = false; |
| continue; |
| } |
| addend -= (sdata2->sym_hash->root.u.def.value |
| + sdata2->sym_hash->root.u.def.section->output_section->vma |
| + sdata2->sym_hash->root.u.def.section->output_offset); |
| } |
| break; |
| |
| /* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */ |
| case (int) R_PPC_EMB_SDA21: |
| case (int) R_PPC_EMB_RELSDA: |
| { |
| const char *name; |
| int reg; |
| |
| BFD_ASSERT (sec != (asection *) 0); |
| name = bfd_get_section_name (abfd, sec->output_section); |
| if (strcmp (name, ".sdata") == 0 || strcmp (name, ".sbss") == 0) |
| { |
| reg = 13; |
| addend -= (sdata->sym_hash->root.u.def.value |
| + sdata->sym_hash->root.u.def.section->output_section->vma |
| + sdata->sym_hash->root.u.def.section->output_offset); |
| } |
| |
| else if (strcmp (name, ".sdata2") == 0 |
| || strcmp (name, ".sbss2") == 0) |
| { |
| reg = 2; |
| addend -= (sdata2->sym_hash->root.u.def.value |
| + sdata2->sym_hash->root.u.def.section->output_section->vma |
| + sdata2->sym_hash->root.u.def.section->output_offset); |
| } |
| |
| else if (strcmp (name, ".PPC.EMB.sdata0") == 0 |
| || strcmp (name, ".PPC.EMB.sbss0") == 0) |
| { |
| reg = 0; |
| } |
| |
| else |
| { |
| (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"), |
| bfd_get_filename (input_bfd), |
| sym_name, |
| ppc_elf_howto_table[(int) r_type]->name, |
| name); |
| |
| bfd_set_error (bfd_error_bad_value); |
| ret = false; |
| continue; |
| } |
| |
| if (r_type == R_PPC_EMB_SDA21) |
| { /* fill in register field */ |
| insn = bfd_get_32 (output_bfd, contents + offset); |
| insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); |
| bfd_put_32 (output_bfd, insn, contents + offset); |
| } |
| } |
| break; |
| |
| /* Relocate against the beginning of the section */ |
| case (int) R_PPC_SECTOFF: |
| case (int) R_PPC_SECTOFF_LO: |
| case (int) R_PPC_SECTOFF_HI: |
| BFD_ASSERT (sec != (asection *) 0); |
| addend -= sec->output_section->vma; |
| break; |
| |
| case (int) R_PPC_SECTOFF_HA: |
| BFD_ASSERT (sec != (asection *) 0); |
| addend -= sec->output_section->vma; |
| addend += ((relocation + addend) & 0x8000) << 1; |
| break; |
| |
| /* Negative relocations */ |
| case (int) R_PPC_EMB_NADDR32: |
| case (int) R_PPC_EMB_NADDR16: |
| case (int) R_PPC_EMB_NADDR16_LO: |
| case (int) R_PPC_EMB_NADDR16_HI: |
| addend -= 2 * relocation; |
| break; |
| |
| case (int) R_PPC_EMB_NADDR16_HA: |
| addend -= 2 * relocation; |
| addend += ((relocation + addend) & 0x8000) << 1; |
| break; |
| |
| /* NOP relocation that prevents garbage collecting linkers from omitting a |
| reference. */ |
| case (int) R_PPC_EMB_MRKREF: |
| continue; |
| |
| case (int) R_PPC_COPY: |
| case (int) R_PPC_GLOB_DAT: |
| case (int) R_PPC_JMP_SLOT: |
| case (int) R_PPC_RELATIVE: |
| case (int) R_PPC_PLT32: |
| case (int) R_PPC_PLTREL32: |
| case (int) R_PPC_PLT16_LO: |
| case (int) R_PPC_PLT16_HI: |
| case (int) R_PPC_PLT16_HA: |
| case (int) R_PPC_EMB_RELSEC16: |
| case (int) R_PPC_EMB_RELST_LO: |
| case (int) R_PPC_EMB_RELST_HI: |
| case (int) R_PPC_EMB_RELST_HA: |
| case (int) R_PPC_EMB_BIT_FLD: |
| (*_bfd_error_handler) (_("%s: Relocation %s is not yet supported for symbol %s."), |
| bfd_get_filename (input_bfd), |
| ppc_elf_howto_table[(int) r_type]->name, |
| sym_name); |
| |
| bfd_set_error (bfd_error_invalid_operation); |
| ret = false; |
| continue; |
| |
| case (int) R_PPC_GNU_VTINHERIT: |
| case (int) R_PPC_GNU_VTENTRY: |
| /* These are no-ops in the end. */ |
| continue; |
| } |
| |
| #ifdef DEBUG |
| fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n", |
| howto->name, |
| (int) r_type, |
| sym_name, |
| r_symndx, |
| (long) offset, |
| (long) addend); |
| #endif |
| |
| r = _bfd_final_link_relocate (howto, |
| 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 |
| && howto->pc_relative) |
| { |
| /* Assume this is a call protected by other code that |
| detect 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, |
| howto->name, |
| (bfd_vma) 0, |
| input_bfd, |
| input_section, |
| offset)) |
| return false; |
| } |
| else |
| ret = false; |
| } |
| |
| #ifdef DEBUG |
| fprintf (stderr, "\n"); |
| #endif |
| |
| return ret; |
| } |
| |
| #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec |
| #define TARGET_LITTLE_NAME "elf32-powerpcle" |
| #define TARGET_BIG_SYM bfd_elf32_powerpc_vec |
| #define TARGET_BIG_NAME "elf32-powerpc" |
| #define ELF_ARCH bfd_arch_powerpc |
| #define ELF_MACHINE_CODE EM_PPC |
| #define ELF_MAXPAGESIZE 0x10000 |
| #define elf_info_to_howto ppc_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_plt_not_loaded 1 |
| #define elf_backend_got_symbol_offset 4 |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_got_header_size 12 |
| #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE |
| |
| #define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data |
| #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data |
| #define bfd_elf32_bfd_relax_section ppc_elf_relax_section |
| #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup |
| #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags |
| #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link |
| |
| #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook |
| #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook |
| #define elf_backend_section_from_shdr ppc_elf_section_from_shdr |
| #define elf_backend_relocate_section ppc_elf_relocate_section |
| #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections |
| #define elf_backend_check_relocs ppc_elf_check_relocs |
| #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol |
| #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook |
| #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections |
| #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol |
| #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections |
| #define elf_backend_fake_sections ppc_elf_fake_sections |
| #define elf_backend_additional_program_headers ppc_elf_additional_program_headers |
| #define elf_backend_modify_segment_map ppc_elf_modify_segment_map |
| |
| #include "elf32-target.h" |