| 1 | /* SPARC-specific support for 32-bit ELF |
| 2 | Copyright (C) 1993-2014 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "sysdep.h" |
| 22 | #include "bfd.h" |
| 23 | #include "bfdlink.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | #include "elf/sparc.h" |
| 27 | #include "opcode/sparc.h" |
| 28 | #include "elfxx-sparc.h" |
| 29 | #include "elf-vxworks.h" |
| 30 | |
| 31 | /* Support for core dump NOTE sections. */ |
| 32 | |
| 33 | static bfd_boolean |
| 34 | elf32_sparc_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 35 | { |
| 36 | switch (note->descsz) |
| 37 | { |
| 38 | default: |
| 39 | return FALSE; |
| 40 | |
| 41 | case 260: /* Solaris prpsinfo_t. */ |
| 42 | elf_tdata (abfd)->core->program |
| 43 | = _bfd_elfcore_strndup (abfd, note->descdata + 84, 16); |
| 44 | elf_tdata (abfd)->core->command |
| 45 | = _bfd_elfcore_strndup (abfd, note->descdata + 100, 80); |
| 46 | break; |
| 47 | |
| 48 | case 336: /* Solaris psinfo_t. */ |
| 49 | elf_tdata (abfd)->core->program |
| 50 | = _bfd_elfcore_strndup (abfd, note->descdata + 88, 16); |
| 51 | elf_tdata (abfd)->core->command |
| 52 | = _bfd_elfcore_strndup (abfd, note->descdata + 104, 80); |
| 53 | break; |
| 54 | } |
| 55 | |
| 56 | return TRUE; |
| 57 | } |
| 58 | |
| 59 | /* Functions for dealing with the e_flags field. |
| 60 | |
| 61 | We don't define set_private_flags or copy_private_bfd_data because |
| 62 | the only currently defined values are based on the bfd mach number, |
| 63 | so we use the latter instead and defer setting e_flags until the |
| 64 | file is written out. */ |
| 65 | |
| 66 | /* Merge backend specific data from an object file to the output |
| 67 | object file when linking. */ |
| 68 | |
| 69 | static bfd_boolean |
| 70 | elf32_sparc_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 71 | { |
| 72 | bfd_boolean error; |
| 73 | unsigned long ibfd_mach; |
| 74 | /* FIXME: This should not be static. */ |
| 75 | static unsigned long previous_ibfd_e_flags = (unsigned long) -1; |
| 76 | |
| 77 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 78 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 79 | return TRUE; |
| 80 | |
| 81 | error = FALSE; |
| 82 | |
| 83 | ibfd_mach = bfd_get_mach (ibfd); |
| 84 | if (bfd_mach_sparc_64bit_p (ibfd_mach)) |
| 85 | { |
| 86 | error = TRUE; |
| 87 | (*_bfd_error_handler) |
| 88 | (_("%B: compiled for a 64 bit system and target is 32 bit"), ibfd); |
| 89 | } |
| 90 | else if ((ibfd->flags & DYNAMIC) == 0) |
| 91 | { |
| 92 | if (bfd_get_mach (obfd) < ibfd_mach) |
| 93 | bfd_set_arch_mach (obfd, bfd_arch_sparc, ibfd_mach); |
| 94 | } |
| 95 | |
| 96 | if (((elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA) |
| 97 | != previous_ibfd_e_flags) |
| 98 | && previous_ibfd_e_flags != (unsigned long) -1) |
| 99 | { |
| 100 | (*_bfd_error_handler) |
| 101 | (_("%B: linking little endian files with big endian files"), ibfd); |
| 102 | error = TRUE; |
| 103 | } |
| 104 | previous_ibfd_e_flags = elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA; |
| 105 | |
| 106 | if (error) |
| 107 | { |
| 108 | bfd_set_error (bfd_error_bad_value); |
| 109 | return FALSE; |
| 110 | } |
| 111 | |
| 112 | return _bfd_sparc_elf_merge_private_bfd_data (ibfd, obfd); |
| 113 | } |
| 114 | |
| 115 | /* The final processing done just before writing out the object file. |
| 116 | We need to set the e_machine field appropriately. */ |
| 117 | |
| 118 | static void |
| 119 | elf32_sparc_final_write_processing (bfd *abfd, |
| 120 | bfd_boolean linker ATTRIBUTE_UNUSED) |
| 121 | { |
| 122 | switch (bfd_get_mach (abfd)) |
| 123 | { |
| 124 | case bfd_mach_sparc : |
| 125 | case bfd_mach_sparc_sparclet : |
| 126 | case bfd_mach_sparc_sparclite : |
| 127 | break; /* nothing to do */ |
| 128 | case bfd_mach_sparc_v8plus : |
| 129 | elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; |
| 130 | elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; |
| 131 | elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS; |
| 132 | break; |
| 133 | case bfd_mach_sparc_v8plusa : |
| 134 | elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; |
| 135 | elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; |
| 136 | elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1; |
| 137 | break; |
| 138 | case bfd_mach_sparc_v8plusb : |
| 139 | elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; |
| 140 | elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; |
| 141 | elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1 |
| 142 | | EF_SPARC_SUN_US3; |
| 143 | break; |
| 144 | case bfd_mach_sparc_sparclite_le : |
| 145 | elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA; |
| 146 | break; |
| 147 | default : |
| 148 | abort (); |
| 149 | break; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | static enum elf_reloc_type_class |
| 154 | elf32_sparc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 155 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 156 | const Elf_Internal_Rela *rela) |
| 157 | { |
| 158 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 159 | { |
| 160 | case R_SPARC_RELATIVE: |
| 161 | return reloc_class_relative; |
| 162 | case R_SPARC_JMP_SLOT: |
| 163 | return reloc_class_plt; |
| 164 | case R_SPARC_COPY: |
| 165 | return reloc_class_copy; |
| 166 | default: |
| 167 | return reloc_class_normal; |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | /* Hook called by the linker routine which adds symbols from an object |
| 172 | file. */ |
| 173 | |
| 174 | static bfd_boolean |
| 175 | elf32_sparc_add_symbol_hook (bfd * abfd, |
| 176 | struct bfd_link_info * info ATTRIBUTE_UNUSED, |
| 177 | Elf_Internal_Sym * sym, |
| 178 | const char ** namep ATTRIBUTE_UNUSED, |
| 179 | flagword * flagsp ATTRIBUTE_UNUSED, |
| 180 | asection ** secp ATTRIBUTE_UNUSED, |
| 181 | bfd_vma * valp ATTRIBUTE_UNUSED) |
| 182 | { |
| 183 | if ((abfd->flags & DYNAMIC) == 0 |
| 184 | && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
| 185 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) |
| 186 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; |
| 187 | return TRUE; |
| 188 | } |
| 189 | |
| 190 | #define TARGET_BIG_SYM bfd_elf32_sparc_vec |
| 191 | #define TARGET_BIG_NAME "elf32-sparc" |
| 192 | #define ELF_ARCH bfd_arch_sparc |
| 193 | #define ELF_TARGET_ID SPARC_ELF_DATA |
| 194 | #define ELF_MACHINE_CODE EM_SPARC |
| 195 | #define ELF_MACHINE_ALT1 EM_SPARC32PLUS |
| 196 | #define ELF_MAXPAGESIZE 0x10000 |
| 197 | #define ELF_COMMONPAGESIZE 0x2000 |
| 198 | |
| 199 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 200 | elf32_sparc_merge_private_bfd_data |
| 201 | #define elf_backend_final_write_processing \ |
| 202 | elf32_sparc_final_write_processing |
| 203 | #define elf_backend_grok_psinfo elf32_sparc_grok_psinfo |
| 204 | #define elf_backend_reloc_type_class elf32_sparc_reloc_type_class |
| 205 | |
| 206 | #define elf_info_to_howto _bfd_sparc_elf_info_to_howto |
| 207 | #define bfd_elf32_bfd_reloc_type_lookup _bfd_sparc_elf_reloc_type_lookup |
| 208 | #define bfd_elf32_bfd_reloc_name_lookup \ |
| 209 | _bfd_sparc_elf_reloc_name_lookup |
| 210 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 211 | _bfd_sparc_elf_link_hash_table_create |
| 212 | #define bfd_elf32_bfd_link_hash_table_free \ |
| 213 | _bfd_sparc_elf_link_hash_table_free |
| 214 | #define bfd_elf32_bfd_relax_section _bfd_sparc_elf_relax_section |
| 215 | #define bfd_elf32_new_section_hook _bfd_sparc_elf_new_section_hook |
| 216 | #define elf_backend_copy_indirect_symbol \ |
| 217 | _bfd_sparc_elf_copy_indirect_symbol |
| 218 | #define elf_backend_create_dynamic_sections \ |
| 219 | _bfd_sparc_elf_create_dynamic_sections |
| 220 | #define elf_backend_check_relocs _bfd_sparc_elf_check_relocs |
| 221 | #define elf_backend_adjust_dynamic_symbol \ |
| 222 | _bfd_sparc_elf_adjust_dynamic_symbol |
| 223 | #define elf_backend_omit_section_dynsym _bfd_sparc_elf_omit_section_dynsym |
| 224 | #define elf_backend_size_dynamic_sections \ |
| 225 | _bfd_sparc_elf_size_dynamic_sections |
| 226 | #define elf_backend_relocate_section _bfd_sparc_elf_relocate_section |
| 227 | #define elf_backend_finish_dynamic_symbol \ |
| 228 | _bfd_sparc_elf_finish_dynamic_symbol |
| 229 | #define elf_backend_finish_dynamic_sections \ |
| 230 | _bfd_sparc_elf_finish_dynamic_sections |
| 231 | #define bfd_elf32_mkobject _bfd_sparc_elf_mkobject |
| 232 | #define elf_backend_object_p _bfd_sparc_elf_object_p |
| 233 | #define elf_backend_gc_mark_hook _bfd_sparc_elf_gc_mark_hook |
| 234 | #define elf_backend_gc_sweep_hook _bfd_sparc_elf_gc_sweep_hook |
| 235 | #define elf_backend_plt_sym_val _bfd_sparc_elf_plt_sym_val |
| 236 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
| 237 | |
| 238 | #define elf_backend_can_gc_sections 1 |
| 239 | #define elf_backend_can_refcount 1 |
| 240 | #define elf_backend_want_got_plt 0 |
| 241 | #define elf_backend_plt_readonly 0 |
| 242 | #define elf_backend_want_plt_sym 1 |
| 243 | #define elf_backend_got_header_size 4 |
| 244 | #define elf_backend_rela_normal 1 |
| 245 | |
| 246 | #define elf_backend_add_symbol_hook elf32_sparc_add_symbol_hook |
| 247 | |
| 248 | #include "elf32-target.h" |
| 249 | |
| 250 | /* Solaris 2. */ |
| 251 | |
| 252 | #undef TARGET_BIG_SYM |
| 253 | #define TARGET_BIG_SYM bfd_elf32_sparc_sol2_vec |
| 254 | #undef TARGET_BIG_NAME |
| 255 | #define TARGET_BIG_NAME "elf32-sparc-sol2" |
| 256 | |
| 257 | #undef elf32_bed |
| 258 | #define elf32_bed elf32_sparc_sol2_bed |
| 259 | |
| 260 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
| 261 | boundary. */ |
| 262 | #undef elf_backend_static_tls_alignment |
| 263 | #define elf_backend_static_tls_alignment 8 |
| 264 | |
| 265 | #include "elf32-target.h" |
| 266 | |
| 267 | /* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies |
| 268 | the target system as VxWorks. */ |
| 269 | |
| 270 | static struct bfd_link_hash_table * |
| 271 | elf32_sparc_vxworks_link_hash_table_create (bfd *abfd) |
| 272 | { |
| 273 | struct bfd_link_hash_table *ret; |
| 274 | |
| 275 | ret = _bfd_sparc_elf_link_hash_table_create (abfd); |
| 276 | if (ret) |
| 277 | { |
| 278 | struct _bfd_sparc_elf_link_hash_table *htab; |
| 279 | |
| 280 | htab = (struct _bfd_sparc_elf_link_hash_table *) ret; |
| 281 | htab->is_vxworks = 1; |
| 282 | } |
| 283 | return ret; |
| 284 | } |
| 285 | |
| 286 | /* A final_write_processing hook that does both the SPARC- and VxWorks- |
| 287 | specific handling. */ |
| 288 | |
| 289 | static void |
| 290 | elf32_sparc_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) |
| 291 | { |
| 292 | elf32_sparc_final_write_processing (abfd, linker); |
| 293 | elf_vxworks_final_write_processing (abfd, linker); |
| 294 | } |
| 295 | |
| 296 | #undef TARGET_BIG_SYM |
| 297 | #define TARGET_BIG_SYM bfd_elf32_sparc_vxworks_vec |
| 298 | #undef TARGET_BIG_NAME |
| 299 | #define TARGET_BIG_NAME "elf32-sparc-vxworks" |
| 300 | |
| 301 | #undef ELF_MINPAGESIZE |
| 302 | #define ELF_MINPAGESIZE 0x1000 |
| 303 | |
| 304 | #undef bfd_elf32_bfd_link_hash_table_create |
| 305 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 306 | elf32_sparc_vxworks_link_hash_table_create |
| 307 | |
| 308 | #undef elf_backend_want_got_plt |
| 309 | #define elf_backend_want_got_plt 1 |
| 310 | #undef elf_backend_plt_readonly |
| 311 | #define elf_backend_plt_readonly 1 |
| 312 | #undef elf_backend_got_header_size |
| 313 | #define elf_backend_got_header_size 12 |
| 314 | #undef elf_backend_add_symbol_hook |
| 315 | #define elf_backend_add_symbol_hook \ |
| 316 | elf_vxworks_add_symbol_hook |
| 317 | #undef elf_backend_link_output_symbol_hook |
| 318 | #define elf_backend_link_output_symbol_hook \ |
| 319 | elf_vxworks_link_output_symbol_hook |
| 320 | #undef elf_backend_emit_relocs |
| 321 | #define elf_backend_emit_relocs \ |
| 322 | elf_vxworks_emit_relocs |
| 323 | #undef elf_backend_final_write_processing |
| 324 | #define elf_backend_final_write_processing \ |
| 325 | elf32_sparc_vxworks_final_write_processing |
| 326 | #undef elf_backend_static_tls_alignment |
| 327 | |
| 328 | #undef elf32_bed |
| 329 | #define elf32_bed sparc_elf_vxworks_bed |
| 330 | |
| 331 | #include "elf32-target.h" |