diff options
Diffstat (limited to 'bfd/elf32-ppc.c')
| -rw-r--r-- | bfd/elf32-ppc.c | 3758 |
1 files changed, 0 insertions, 3758 deletions
diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c deleted file mode 100644 index ab803f44f44..00000000000 --- a/bfd/elf32-ppc.c +++ /dev/null @@ -1,3758 +0,0 @@ -/* 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" |