diff options
Diffstat (limited to 'bfd/elf32-ppc.c')
| -rw-r--r-- | bfd/elf32-ppc.c | 3848 |
1 files changed, 3848 insertions, 0 deletions
diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c new file mode 100644 index 00000000000..25bb24ae4f9 --- /dev/null +++ b/bfd/elf32-ppc.c @@ -0,0 +1,3848 @@ +/* PowerPC-specific support for 32-bit ELF + Copyright 1994, 95, 96, 97, 98, 1999 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_adjust_dynindx PARAMS ((struct elf_link_hash_entry *, PTR)); + +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 + + +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; + 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; + 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; + arelent *reloc_entry; + asymbol *symbol; + PTR data; + asection *input_section; + bfd *output_bfd; + char **error_message; +{ + 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 (ibfd->xvec->byteorder != obfd->xvec->byteorder + && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) + { + const char *msg; + + if (bfd_big_endian (ibfd)) + msg = _("%s: compiled for a big endian system and target is little endian"); + else + msg = _("%s: compiled for a little endian system and target is big endian"); + + (*_bfd_error_handler) (msg, bfd_get_filename (ibfd)); + + bfd_set_error (bfd_error_wrong_format); + return false; + } + + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return true; + + new_flags = elf_elfheader (ibfd)->e_flags; + old_flags = elf_elfheader (obfd)->e_flags; + if (!elf_flags_init (obfd)) /* First call, no flags set */ + { + elf_flags_init (obfd) = true; + elf_elfheader (obfd)->e_flags = new_flags; + } + + else if (new_flags == old_flags) /* Compatible flags are ok */ + ; + + else /* Incompatible flags */ + { + /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib to be linked + with either. */ + error = false; + if ((new_flags & EF_PPC_RELOCATABLE) != 0 + && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) + { + error = true; + (*_bfd_error_handler) + (_("%s: compiled with -mrelocatable and linked with modules compiled normally"), + bfd_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; + 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; +{ + 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 + || ((!info->shared || info->symbolic || h->dynindx == -1) + && (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) != 0) + || (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 symbol is defined in + this object, because this object is the application, + is linked with -Bsymbolic, or because the symbol is local. + + 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; +} + + +/* Increment the index of a dynamic symbol by a given amount. Called + via elf_link_hash_traverse. */ + +static boolean +ppc_elf_adjust_dynindx (h, cparg) + struct elf_link_hash_entry *h; + PTR cparg; +{ + int *cp = (int *) cparg; + +#ifdef DEBUG + fprintf (stderr, "ppc_elf_adjust_dynindx called, h->dynindx = %d, *cp = %d\n", h->dynindx, *cp); +#endif + + if (h->dynindx != -1) + h->dynindx += *cp; + + 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 (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; + } + } + + /* If we are generating a shared library, we generate a section + symbol for each output section. These are local symbols, which + means that they must come first in the dynamic symbol table. + That means we must increment the dynamic symbol index of every + other dynamic symbol. + + FIXME: We assume that there will never be relocations to + locations in linker-created sections that do not have + externally-visible names. Instead, we should work out precisely + which sections relocations are targetted at. */ + if (info->shared) + { + int c; + + for (c = 0, s = output_bfd->sections; s != NULL; s = s->next) + { + if ((s->flags & SEC_LINKER_CREATED) != 0 + || (s->flags & SEC_ALLOC) == 0) + { + elf_section_data (s)->dynindx = -1; + continue; + } + + /* These symbols will have no names, so we don't need to + fiddle with dynstr_index. */ + + elf_section_data (s)->dynindx = c + 1; + + c++; + } + + elf_link_hash_traverse (elf_hash_table (info), + ppc_elf_adjust_dynindx, + (PTR) &c); + elf_hash_table (info)->dynsymcount += c; + } + + 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) + 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; + 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; + 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[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. */ + +/*ARGSUSED*/ +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; + flagword *flagsp; + 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 (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 + && (info->symbolic || h->dynindx == -1) + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) + { + 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; + } + + if (info->shared) + { + asection *sdynsym; + asection *s; + Elf_Internal_Sym sym; + int maxdindx = 0; + + /* Set up the section symbols for the output sections. */ + + sdynsym = bfd_get_section_by_name (dynobj, ".dynsym"); + BFD_ASSERT (sdynsym != NULL); + + sym.st_size = 0; + sym.st_name = 0; + sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); + sym.st_other = 0; + + for (s = output_bfd->sections; s != NULL; s = s->next) + { + int indx, dindx; + + sym.st_value = s->vma; + + indx = elf_section_data (s)->this_idx; + dindx = elf_section_data (s)->dynindx; + if (dindx != -1) + { + BFD_ASSERT(indx > 0); + BFD_ASSERT(dindx > 0); + + if (dindx > maxdindx) + maxdindx = dindx; + + sym.st_shndx = indx; + + bfd_elf32_swap_symbol_out (output_bfd, &sym, + (PTR) (((Elf32_External_Sym *) + sdynsym->contents) + + dindx)); + } + } + + /* Set the sh_info field of the output .dynsym section to the + index of the first global symbol. */ + elf_section_data (sdynsym->output_section)->this_hdr.sh_info = + maxdindx + 1; + } + + 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; + + /* 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); + } + 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; + 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 + && 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 + || (! info->symbolic && h->dynindx != -1) + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0)) + || (info->shared + && ((! info->symbolic && h->dynindx != -1) + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0) + && (input_section->flags & SEC_ALLOC) != 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_PLTREL24 + || 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 + 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) + relocation = 0; + else + { + (*info->callbacks->undefined_symbol)(info, + h->root.root.string, + input_bfd, + input_section, + rel->r_offset); + ret = false; + continue; + } + } + + 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) + { + (*info->callbacks->undefined_symbol) (info, + h->root.root.string, + input_bfd, + input_section, + rel->r_offset); + ret = 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) + 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 (h != NULL + && ((! info->symbolic && h->dynindx != -1) + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0)) + { + BFD_ASSERT (h->dynindx != -1); + 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 + && (info->symbolic || h->dynindx == -1) + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) + { + /* This is actually a static link, or it is a + -Bsymbolic link and the symbol is defined + locally. 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) + { + ret = false; + switch (r) + { + default: + break; + + case bfd_reloc_overflow: + { + const char *name; + + if (h != NULL) + 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) + break; + + if (*name == '\0') + name = bfd_section_name (input_bfd, sec); + } + + (*info->callbacks->reloc_overflow)(info, + name, + howto->name, + (bfd_vma) 0, + input_bfd, + input_section, + offset); + } + break; + + } + } + } + + +#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" |