diff options
Diffstat (limited to 'bfd/elf64-mips.c')
| -rw-r--r-- | bfd/elf64-mips.c | 325 |
1 files changed, 194 insertions, 131 deletions
diff --git a/bfd/elf64-mips.c b/bfd/elf64-mips.c index 9fb8bb9c85e..6fc0dcdf0e4 100644 --- a/bfd/elf64-mips.c +++ b/bfd/elf64-mips.c @@ -1,6 +1,8 @@ /* MIPS-specific support for 64-bit ELF - Copyright 1996, 1997, 1998 Free Software Foundation, Inc. + Copyright 1996, 1997, 1998, 1999 Free Software Foundation, Inc. Ian Lance Taylor, Cygnus Support + Linker support added by Mark Mitchell, CodeSourcery, LLC. + <mark@codesourcery.com> This file is part of BFD, the Binary File Descriptor library. @@ -52,14 +54,20 @@ static void mips_elf64_swap_reloc_in static void mips_elf64_swap_reloca_in PARAMS ((bfd *, const Elf64_Mips_External_Rela *, Elf64_Mips_Internal_Rela *)); -#if 0 static void mips_elf64_swap_reloc_out PARAMS ((bfd *, const Elf64_Mips_Internal_Rel *, Elf64_Mips_External_Rel *)); -#endif static void mips_elf64_swap_reloca_out PARAMS ((bfd *, const Elf64_Mips_Internal_Rela *, Elf64_Mips_External_Rela *)); +static void mips_elf64_be_swap_reloc_in + PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rel *)); +static void mips_elf64_be_swap_reloc_out + PARAMS ((bfd *, const Elf_Internal_Rel *, bfd_byte *)); +static void mips_elf64_be_swap_reloca_in + PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *)); +static void mips_elf64_be_swap_reloca_out + PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *)); static reloc_howto_type *mips_elf64_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); static long mips_elf64_get_reloc_upper_bound PARAMS ((bfd *, asection *)); @@ -68,10 +76,6 @@ static boolean mips_elf64_slurp_one_reloc_table static boolean mips_elf64_slurp_reloc_table PARAMS ((bfd *, asection *, asymbol **, boolean)); static void mips_elf64_write_relocs PARAMS ((bfd *, asection *, PTR)); -static boolean mips_elf64_section_from_shdr - PARAMS ((bfd *, Elf_Internal_Shdr *, char *)); -static boolean mips_elf64_section_processing - PARAMS ((bfd *, Elf_Internal_Shdr *)); static boolean mips_elf64_slurp_armap PARAMS ((bfd *)); static boolean mips_elf64_write_armap PARAMS ((bfd *, unsigned int, struct orl *, unsigned int, int)); @@ -80,6 +84,9 @@ static boolean mips_elf64_write_armap from smaller values. Start with zero, widen, *then* decrement. */ #define MINUS_ONE (((bfd_vma)0) - 1) +/* The number of local .got entries we reserve. */ +#define MIPS_RESERVED_GOTNO (2) + /* The relocation table used for SHT_REL sections. */ static reloc_howto_type mips_elf64_howto_table_rel[] = @@ -614,7 +621,23 @@ static reloc_howto_type mips_elf64_howto_table_rel[] = false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ - false) /* pcrel_offset */ + false), /* pcrel_offset */ + + /* Protected jump conversion. This is an optimization hint. No + relocation is required for correctness. */ + HOWTO (R_MIPS_JALR, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_MIPS_JALR", /* name */ + false, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0x00000000, /* dst_mask */ + false), /* pcrel_offset */ }; /* The relocation table used for SHT_RELA sections. */ @@ -1152,7 +1175,23 @@ static reloc_howto_type mips_elf64_howto_table_rela[] = false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ - false) /* pcrel_offset */ + false), /* pcrel_offset */ + + /* Protected jump conversion. This is an optimization hint. No + relocation is required for correctness. */ + HOWTO (R_MIPS_JALR, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_MIPS_JALR", /* name */ + false, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0x00000000, /* dst_mask */ + false), /* pcrel_offset */ }; /* Swap in a MIPS 64-bit Rel reloc. */ @@ -1188,10 +1227,6 @@ mips_elf64_swap_reloca_in (abfd, src, dst) dst->r_addend = bfd_h_get_signed_64 (abfd, (bfd_byte *) src->r_addend); } -#if 0 - -/* This is not currently used. */ - /* Swap out a MIPS 64-bit Rel reloc. */ static void @@ -1208,8 +1243,6 @@ mips_elf64_swap_reloc_out (abfd, src, dst) bfd_h_put_8 (abfd, src->r_type, (bfd_byte *) dst->r_type); } -#endif /* 0 */ - /* Swap out a MIPS 64-bit Rela reloc. */ static void @@ -1227,6 +1260,96 @@ mips_elf64_swap_reloca_out (abfd, src, dst) bfd_h_put_64 (abfd, src->r_addend, (bfd_byte *) dst->r_addend); } +/* Swap in a MIPS 64-bit Rel reloc. */ + +static void +mips_elf64_be_swap_reloc_in (abfd, src, dst) + bfd *abfd; + const bfd_byte *src; + Elf_Internal_Rel *dst; +{ + Elf64_Mips_Internal_Rel mirel; + + mips_elf64_swap_reloc_in (abfd, + (const Elf64_Mips_External_Rel *) src, + &mirel); + + dst[0].r_offset = mirel.r_offset; + dst[0].r_info = ELF32_R_INFO (mirel.r_sym, mirel.r_type); + dst[1].r_offset = mirel.r_offset; + dst[1].r_info = ELF32_R_INFO (mirel.r_ssym, mirel.r_type2); + dst[2].r_offset = mirel.r_offset; + dst[2].r_info = ELF32_R_INFO (STN_UNDEF, mirel.r_type3); +} + +/* Swap in a MIPS 64-bit Rela reloc. */ + +static void +mips_elf64_be_swap_reloca_in (abfd, src, dst) + bfd *abfd; + const bfd_byte *src; + Elf_Internal_Rela *dst; +{ + Elf64_Mips_Internal_Rela mirela; + + mips_elf64_swap_reloca_in (abfd, + (const Elf64_Mips_External_Rela *) src, + &mirela); + + dst[0].r_offset = mirela.r_offset; + dst[0].r_info = ELF32_R_INFO (mirela.r_sym, mirela.r_type); + dst[0].r_addend = mirela.r_addend; + dst[1].r_offset = mirela.r_offset; + dst[1].r_info = ELF32_R_INFO (mirela.r_ssym, mirela.r_type2); + dst[1].r_addend = 0; + dst[2].r_offset = mirela.r_offset; + dst[2].r_info = ELF32_R_INFO (STN_UNDEF, mirela.r_type3); + dst[2].r_addend = 0; +} + +/* Swap out a MIPS 64-bit Rel reloc. */ + +static void +mips_elf64_be_swap_reloc_out (abfd, src, dst) + bfd *abfd; + const Elf_Internal_Rel *src; + bfd_byte *dst; +{ + Elf64_Mips_Internal_Rel mirel; + + mirel.r_offset = src->r_offset; + mirel.r_type = ELF32_R_TYPE (src->r_info); + mirel.r_sym = ELF32_R_SYM (src->r_info); + mirel.r_type2 = R_MIPS_NONE; + mirel.r_ssym = STN_UNDEF; + mirel.r_type3 = R_MIPS_NONE; + + mips_elf64_swap_reloc_out (abfd, &mirel, + (Elf64_Mips_External_Rel *) dst); +} + +/* Swap out a MIPS 64-bit Rela reloc. */ + +static void +mips_elf64_be_swap_reloca_out (abfd, src, dst) + bfd *abfd; + const Elf_Internal_Rela *src; + bfd_byte *dst; +{ + Elf64_Mips_Internal_Rela mirela; + + mirela.r_offset = src->r_offset; + mirela.r_type = ELF32_R_TYPE (src->r_info); + mirela.r_addend = src->r_addend; + mirela.r_sym = ELF32_R_SYM (src->r_info); + mirela.r_type2 = R_MIPS_NONE; + mirela.r_ssym = STN_UNDEF; + mirela.r_type3 = R_MIPS_NONE; + + mips_elf64_swap_reloca_out (abfd, &mirela, + (Elf64_Mips_External_Rela *) dst); +} + /* A mapping from BFD reloc types to MIPS ELF reloc types. */ struct elf_reloc_map @@ -1255,7 +1378,11 @@ static CONST struct elf_reloc_map mips_reloc_map[] = { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 }, { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 }, { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 }, - { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 } + { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 }, + { BFD_RELOC_MIPS_SUB, R_MIPS_SUB }, + { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE }, + { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST }, + { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP } }; /* Given a BFD reloc type, return a howto structure. */ @@ -1688,115 +1815,6 @@ mips_elf64_write_relocs (abfd, sec, data) == count); } -/* Handle a 64-bit MIPS ELF specific section. */ - -static boolean -mips_elf64_section_from_shdr (abfd, hdr, name) - bfd *abfd; - Elf_Internal_Shdr *hdr; - char *name; -{ - if (! _bfd_mips_elf_section_from_shdr (abfd, hdr, name)) - return false; - - /* For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and - set the gp value based on what we find. We may see both - SHT_MIPS_REGINFO and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case, - they should agree. */ - if (hdr->sh_type == SHT_MIPS_OPTIONS) - { - bfd_byte *contents, *l, *lend; - - contents = (bfd_byte *) bfd_malloc (hdr->sh_size); - if (contents == NULL) - return false; - if (! bfd_get_section_contents (abfd, hdr->bfd_section, contents, - (file_ptr) 0, hdr->sh_size)) - { - free (contents); - return false; - } - l = contents; - lend = contents + hdr->sh_size; - while (l + sizeof (Elf_External_Options) <= lend) - { - Elf_Internal_Options intopt; - - bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l, - &intopt); - if (intopt.kind == ODK_REGINFO) - { - Elf64_Internal_RegInfo intreg; - - bfd_mips_elf64_swap_reginfo_in - (abfd, - ((Elf64_External_RegInfo *) - (l + sizeof (Elf_External_Options))), - &intreg); - elf_gp (abfd) = intreg.ri_gp_value; - } - l += intopt.size; - } - free (contents); - } - - return true; -} - -/* Work over a section just before writing it out. We update the GP - value in the SHT_MIPS_OPTIONS section based on the value we are - using. */ - -static boolean -mips_elf64_section_processing (abfd, hdr) - bfd *abfd; - Elf_Internal_Shdr *hdr; -{ - if (hdr->sh_type == SHT_MIPS_OPTIONS - && hdr->bfd_section != NULL - && elf_section_data (hdr->bfd_section) != NULL - && elf_section_data (hdr->bfd_section)->tdata != NULL) - { - bfd_byte *contents, *l, *lend; - - /* We stored the section contents in the elf_section_data tdata - field in the set_section_contents routine. We save the - section contents so that we don't have to read them again. - At this point we know that elf_gp is set, so we can look - through the section contents to see if there is an - ODK_REGINFO structure. */ - - contents = (bfd_byte *) elf_section_data (hdr->bfd_section)->tdata; - l = contents; - lend = contents + hdr->sh_size; - while (l + sizeof (Elf_External_Options) <= lend) - { - Elf_Internal_Options intopt; - - bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l, - &intopt); - if (intopt.kind == ODK_REGINFO) - { - bfd_byte buf[8]; - - if (bfd_seek (abfd, - (hdr->sh_offset - + (l - contents) - + sizeof (Elf_External_Options) - + (sizeof (Elf64_External_RegInfo) - 8)), - SEEK_SET) == -1) - return false; - bfd_h_put_64 (abfd, elf_gp (abfd), buf); - if (bfd_write (buf, 1, 8, abfd) != 8) - return false; - } - l += intopt.size; - } - } - - return _bfd_mips_elf_section_processing (abfd, hdr); -} - /* Irix 6 defines a brand new archive map format, so that they can have archives more than 4 GB in size. */ @@ -2063,6 +2081,8 @@ const struct elf_size_info mips_elf64_size_info = sizeof (Elf64_External_Sym), sizeof (Elf64_External_Dyn), sizeof (Elf_External_Note), + 4, /* hash-table entry size */ + 3, /* internal relocations per external relocations */ 64, /* arch_size */ 8, /* file_align */ ELFCLASS64, @@ -2073,7 +2093,12 @@ const struct elf_size_info mips_elf64_size_info = bfd_elf64_swap_symbol_out, mips_elf64_slurp_reloc_table, bfd_elf64_slurp_symbol_table, - bfd_elf64_swap_dyn_in + bfd_elf64_swap_dyn_in, + bfd_elf64_swap_dyn_out, + mips_elf64_be_swap_reloc_in, + mips_elf64_be_swap_reloc_out, + mips_elf64_be_swap_reloca_in, + mips_elf64_be_swap_reloca_out }; #define TARGET_LITTLE_SYM bfd_elf64_littlemips_vec @@ -2082,29 +2107,67 @@ const struct elf_size_info mips_elf64_size_info = #define TARGET_BIG_NAME "elf64-bigmips" #define ELF_ARCH bfd_arch_mips #define ELF_MACHINE_CODE EM_MIPS + #define ELF_MAXPAGESIZE 0x1000 + +#define elf_backend_collect true +#define elf_backend_type_change_ok true +#define elf_backend_can_gc_sections true #define elf_backend_size_info mips_elf64_size_info #define elf_backend_object_p _bfd_mips_elf_object_p -#define elf_backend_section_from_shdr mips_elf64_section_from_shdr +#define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr #define elf_backend_fake_sections _bfd_mips_elf_fake_sections #define elf_backend_section_from_bfd_section \ _bfd_mips_elf_section_from_bfd_section -#define elf_backend_section_processing mips_elf64_section_processing +#define elf_backend_section_processing _bfd_mips_elf_section_processing #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing +#define elf_backend_additional_program_headers \ + _bfd_mips_elf_additional_program_headers +#define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map #define elf_backend_final_write_processing \ _bfd_mips_elf_final_write_processing #define elf_backend_ecoff_debug_swap &mips_elf64_ecoff_debug_swap - +#define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook +#define elf_backend_create_dynamic_sections \ + _bfd_mips_elf_create_dynamic_sections +#define elf_backend_check_relocs _bfd_mips_elf_check_relocs +#define elf_backend_adjust_dynamic_symbol \ + _bfd_mips_elf_adjust_dynamic_symbol +#define elf_backend_always_size_sections \ + _bfd_mips_elf_always_size_sections +#define elf_backend_size_dynamic_sections \ + _bfd_mips_elf_size_dynamic_sections +#define elf_backend_relocate_section _bfd_mips_elf_relocate_section +#define elf_backend_link_output_symbol_hook \ + _bfd_mips_elf_link_output_symbol_hook +#define elf_backend_finish_dynamic_symbol \ + _bfd_mips_elf_finish_dynamic_symbol +#define elf_backend_finish_dynamic_sections \ + _bfd_mips_elf_finish_dynamic_sections +#define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook +#define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook +#define elf_backend_got_header_size (4*MIPS_RESERVED_GOTNO) +#define elf_backend_plt_header_size 0 +#define elf_backend_may_use_rel_p 1 + +/* We don't set bfd_elf64_bfd_is_local_label_name because the 32-bit + MIPS-specific function only applies to IRIX5, which had no 64-bit + ABI. */ #define bfd_elf64_find_nearest_line _bfd_mips_elf_find_nearest_line -#define bfd_elf64_get_reloc_upper_bound mips_elf64_get_reloc_upper_bound -#define bfd_elf64_bfd_reloc_type_lookup mips_elf64_reloc_type_lookup #define bfd_elf64_set_section_contents _bfd_mips_elf_set_section_contents +#define bfd_elf64_bfd_link_hash_table_create \ + _bfd_mips_elf_link_hash_table_create +#define bfd_elf64_bfd_final_link _bfd_mips_elf_final_link #define bfd_elf64_bfd_copy_private_bfd_data \ _bfd_mips_elf_copy_private_bfd_data #define bfd_elf64_bfd_merge_private_bfd_data \ _bfd_mips_elf_merge_private_bfd_data #define bfd_elf64_bfd_set_private_flags _bfd_mips_elf_set_private_flags +#define bfd_elf64_bfd_print_private_bfd_data \ + _bfd_mips_elf_print_private_bfd_data +#define bfd_elf64_get_reloc_upper_bound mips_elf64_get_reloc_upper_bound +#define bfd_elf64_bfd_reloc_type_lookup mips_elf64_reloc_type_lookup #define bfd_elf64_archive_functions #define bfd_elf64_archive_slurp_armap mips_elf64_slurp_armap #define bfd_elf64_archive_slurp_extended_name_table \ |