| 1 | /* Intel i386 Mach-O support for BFD. |
| 2 | Copyright (C) 2009-2015 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 "mach-o.h" |
| 23 | #include "bfd.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "libiberty.h" |
| 26 | #include "mach-o/reloc.h" |
| 27 | |
| 28 | #define bfd_mach_o_object_p bfd_mach_o_i386_object_p |
| 29 | #define bfd_mach_o_core_p bfd_mach_o_i386_core_p |
| 30 | #define bfd_mach_o_mkobject bfd_mach_o_i386_mkobject |
| 31 | |
| 32 | static const bfd_target * |
| 33 | bfd_mach_o_i386_object_p (bfd *abfd) |
| 34 | { |
| 35 | return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_CPU_TYPE_I386); |
| 36 | } |
| 37 | |
| 38 | static const bfd_target * |
| 39 | bfd_mach_o_i386_core_p (bfd *abfd) |
| 40 | { |
| 41 | return bfd_mach_o_header_p (abfd, |
| 42 | BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_I386); |
| 43 | } |
| 44 | |
| 45 | static bfd_boolean |
| 46 | bfd_mach_o_i386_mkobject (bfd *abfd) |
| 47 | { |
| 48 | bfd_mach_o_data_struct *mdata; |
| 49 | |
| 50 | if (!bfd_mach_o_mkobject_init (abfd)) |
| 51 | return FALSE; |
| 52 | |
| 53 | mdata = bfd_mach_o_get_data (abfd); |
| 54 | mdata->header.magic = BFD_MACH_O_MH_MAGIC; |
| 55 | mdata->header.cputype = BFD_MACH_O_CPU_TYPE_I386; |
| 56 | mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_X86_ALL; |
| 57 | mdata->header.byteorder = BFD_ENDIAN_LITTLE; |
| 58 | mdata->header.version = 1; |
| 59 | |
| 60 | return TRUE; |
| 61 | } |
| 62 | |
| 63 | static reloc_howto_type i386_howto_table[]= |
| 64 | { |
| 65 | /* 0 */ |
| 66 | HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0, |
| 67 | complain_overflow_bitfield, |
| 68 | NULL, "32", |
| 69 | FALSE, 0xffffffff, 0xffffffff, FALSE), |
| 70 | HOWTO(BFD_RELOC_16, 0, 1, 16, FALSE, 0, |
| 71 | complain_overflow_bitfield, |
| 72 | NULL, "16", |
| 73 | FALSE, 0xffff, 0xffff, FALSE), |
| 74 | HOWTO(BFD_RELOC_8, 0, 0, 8, FALSE, 0, |
| 75 | complain_overflow_bitfield, |
| 76 | NULL, "8", |
| 77 | FALSE, 0xff, 0xff, FALSE), |
| 78 | HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0, |
| 79 | complain_overflow_bitfield, |
| 80 | NULL, "DISP32", |
| 81 | FALSE, 0xffffffff, 0xffffffff, TRUE), |
| 82 | /* 4 */ |
| 83 | HOWTO(BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0, |
| 84 | complain_overflow_bitfield, |
| 85 | NULL, "DISP16", |
| 86 | FALSE, 0xffff, 0xffff, TRUE), |
| 87 | HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0, |
| 88 | complain_overflow_bitfield, |
| 89 | NULL, "SECTDIFF_32", |
| 90 | FALSE, 0xffffffff, 0xffffffff, FALSE), |
| 91 | HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 2, 32, FALSE, 0, |
| 92 | complain_overflow_bitfield, |
| 93 | NULL, "LSECTDIFF_32", |
| 94 | FALSE, 0xffffffff, 0xffffffff, FALSE), |
| 95 | HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0, |
| 96 | complain_overflow_bitfield, |
| 97 | NULL, "PAIR_32", |
| 98 | FALSE, 0xffffffff, 0xffffffff, FALSE), |
| 99 | /* 8 */ |
| 100 | HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 1, 16, FALSE, 0, |
| 101 | complain_overflow_bitfield, |
| 102 | NULL, "SECTDIFF_16", |
| 103 | FALSE, 0xffff, 0xffff, FALSE), |
| 104 | HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 1, 16, FALSE, 0, |
| 105 | complain_overflow_bitfield, |
| 106 | NULL, "LSECTDIFF_16", |
| 107 | FALSE, 0xffff, 0xffff, FALSE), |
| 108 | HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 1, 16, FALSE, 0, |
| 109 | complain_overflow_bitfield, |
| 110 | NULL, "PAIR_16", |
| 111 | FALSE, 0xffff, 0xffff, FALSE), |
| 112 | }; |
| 113 | |
| 114 | static bfd_boolean |
| 115 | bfd_mach_o_i386_swap_reloc_in (arelent *res, bfd_mach_o_reloc_info *reloc) |
| 116 | { |
| 117 | if (reloc->r_scattered) |
| 118 | { |
| 119 | switch (reloc->r_type) |
| 120 | { |
| 121 | case BFD_MACH_O_GENERIC_RELOC_PAIR: |
| 122 | if (reloc->r_length == 2) |
| 123 | { |
| 124 | res->howto = &i386_howto_table[7]; |
| 125 | res->address = res[-1].address; |
| 126 | return TRUE; |
| 127 | } |
| 128 | else if (reloc->r_length == 1) |
| 129 | { |
| 130 | res->howto = &i386_howto_table[10]; |
| 131 | res->address = res[-1].address; |
| 132 | return TRUE; |
| 133 | } |
| 134 | return FALSE; |
| 135 | case BFD_MACH_O_GENERIC_RELOC_SECTDIFF: |
| 136 | if (reloc->r_length == 2) |
| 137 | { |
| 138 | res->howto = &i386_howto_table[5]; |
| 139 | return TRUE; |
| 140 | } |
| 141 | else if (reloc->r_length == 1) |
| 142 | { |
| 143 | res->howto = &i386_howto_table[8]; |
| 144 | return TRUE; |
| 145 | } |
| 146 | return FALSE; |
| 147 | case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF: |
| 148 | if (reloc->r_length == 2) |
| 149 | { |
| 150 | res->howto = &i386_howto_table[6]; |
| 151 | return TRUE; |
| 152 | } |
| 153 | else if (reloc->r_length == 1) |
| 154 | { |
| 155 | res->howto = &i386_howto_table[9]; |
| 156 | return TRUE; |
| 157 | } |
| 158 | return FALSE; |
| 159 | default: |
| 160 | return FALSE; |
| 161 | } |
| 162 | } |
| 163 | else |
| 164 | { |
| 165 | switch (reloc->r_type) |
| 166 | { |
| 167 | case BFD_MACH_O_GENERIC_RELOC_VANILLA: |
| 168 | switch ((reloc->r_length << 1) | reloc->r_pcrel) |
| 169 | { |
| 170 | case 0: /* len = 0, pcrel = 0 */ |
| 171 | res->howto = &i386_howto_table[2]; |
| 172 | return TRUE; |
| 173 | case 2: /* len = 1, pcrel = 0 */ |
| 174 | res->howto = &i386_howto_table[1]; |
| 175 | return TRUE; |
| 176 | case 3: /* len = 1, pcrel = 1 */ |
| 177 | res->howto = &i386_howto_table[4]; |
| 178 | return TRUE; |
| 179 | case 4: /* len = 2, pcrel = 0 */ |
| 180 | res->howto = &i386_howto_table[0]; |
| 181 | return TRUE; |
| 182 | case 5: /* len = 2, pcrel = 1 */ |
| 183 | res->howto = &i386_howto_table[3]; |
| 184 | return TRUE; |
| 185 | default: |
| 186 | return FALSE; |
| 187 | } |
| 188 | break; |
| 189 | default: |
| 190 | return FALSE; |
| 191 | } |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | static bfd_boolean |
| 196 | bfd_mach_o_i386_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo) |
| 197 | { |
| 198 | rinfo->r_address = rel->address; |
| 199 | switch (rel->howto->type) |
| 200 | { |
| 201 | case BFD_RELOC_32: |
| 202 | case BFD_RELOC_32_PCREL: |
| 203 | case BFD_RELOC_16: |
| 204 | case BFD_RELOC_16_PCREL: |
| 205 | case BFD_RELOC_8: |
| 206 | rinfo->r_scattered = 0; |
| 207 | rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_VANILLA; |
| 208 | rinfo->r_pcrel = rel->howto->pc_relative; |
| 209 | rinfo->r_length = rel->howto->size; /* Correct in practice. */ |
| 210 | if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) |
| 211 | { |
| 212 | rinfo->r_extern = 0; |
| 213 | rinfo->r_value = |
| 214 | (*rel->sym_ptr_ptr)->section->output_section->target_index; |
| 215 | } |
| 216 | else |
| 217 | { |
| 218 | rinfo->r_extern = 1; |
| 219 | rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i; |
| 220 | } |
| 221 | break; |
| 222 | case BFD_RELOC_MACH_O_SECTDIFF: |
| 223 | rinfo->r_scattered = 1; |
| 224 | rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_SECTDIFF; |
| 225 | rinfo->r_pcrel = 0; |
| 226 | rinfo->r_length = rel->howto->size; |
| 227 | rinfo->r_extern = 0; |
| 228 | rinfo->r_value = rel->addend; |
| 229 | break; |
| 230 | case BFD_RELOC_MACH_O_LOCAL_SECTDIFF: |
| 231 | rinfo->r_scattered = 1; |
| 232 | rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF; |
| 233 | rinfo->r_pcrel = 0; |
| 234 | rinfo->r_length = rel->howto->size; |
| 235 | rinfo->r_extern = 0; |
| 236 | rinfo->r_value = rel->addend; |
| 237 | break; |
| 238 | case BFD_RELOC_MACH_O_PAIR: |
| 239 | rinfo->r_address = 0; |
| 240 | rinfo->r_scattered = 1; |
| 241 | rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_PAIR; |
| 242 | rinfo->r_pcrel = 0; |
| 243 | rinfo->r_length = rel->howto->size; |
| 244 | rinfo->r_extern = 0; |
| 245 | rinfo->r_value = rel->addend; |
| 246 | break; |
| 247 | default: |
| 248 | return FALSE; |
| 249 | } |
| 250 | return TRUE; |
| 251 | } |
| 252 | |
| 253 | static reloc_howto_type * |
| 254 | bfd_mach_o_i386_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 255 | bfd_reloc_code_real_type code) |
| 256 | { |
| 257 | unsigned int i; |
| 258 | |
| 259 | for (i = 0; i < sizeof (i386_howto_table) / sizeof (*i386_howto_table); i++) |
| 260 | if (code == i386_howto_table[i].type) |
| 261 | return &i386_howto_table[i]; |
| 262 | return NULL; |
| 263 | } |
| 264 | |
| 265 | static reloc_howto_type * |
| 266 | bfd_mach_o_i386_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 267 | const char *name ATTRIBUTE_UNUSED) |
| 268 | { |
| 269 | return NULL; |
| 270 | } |
| 271 | |
| 272 | static bfd_boolean |
| 273 | bfd_mach_o_i386_print_thread (bfd *abfd, bfd_mach_o_thread_flavour *thread, |
| 274 | void *vfile, char *buf) |
| 275 | { |
| 276 | FILE *file = (FILE *)vfile; |
| 277 | |
| 278 | switch (thread->flavour) |
| 279 | { |
| 280 | case BFD_MACH_O_x86_THREAD_STATE: |
| 281 | if (thread->size < (8 + 16 * 4)) |
| 282 | return FALSE; |
| 283 | fprintf (file, " x86_THREAD_STATE:\n"); |
| 284 | fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n", |
| 285 | (unsigned long)bfd_get_32 (abfd, buf + 0), |
| 286 | (unsigned long)bfd_get_32 (abfd, buf + 4)); |
| 287 | fprintf (file, " eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n", |
| 288 | (unsigned long)bfd_get_32 (abfd, buf + 8), |
| 289 | (unsigned long)bfd_get_32 (abfd, buf + 12), |
| 290 | (unsigned long)bfd_get_32 (abfd, buf + 16), |
| 291 | (unsigned long)bfd_get_32 (abfd, buf + 20)); |
| 292 | fprintf (file, " edi: %08lx esi: %08lx ebp: %08lx esp: %08lx\n", |
| 293 | (unsigned long)bfd_get_32 (abfd, buf + 24), |
| 294 | (unsigned long)bfd_get_32 (abfd, buf + 28), |
| 295 | (unsigned long)bfd_get_32 (abfd, buf + 32), |
| 296 | (unsigned long)bfd_get_32 (abfd, buf + 36)); |
| 297 | fprintf (file, " ss: %08lx flg: %08lx eip: %08lx cs: %08lx\n", |
| 298 | (unsigned long)bfd_get_32 (abfd, buf + 40), |
| 299 | (unsigned long)bfd_get_32 (abfd, buf + 44), |
| 300 | (unsigned long)bfd_get_32 (abfd, buf + 48), |
| 301 | (unsigned long)bfd_get_32 (abfd, buf + 52)); |
| 302 | fprintf (file, " ds: %08lx es: %08lx fs: %08lx gs: %08lx\n", |
| 303 | (unsigned long)bfd_get_32 (abfd, buf + 56), |
| 304 | (unsigned long)bfd_get_32 (abfd, buf + 60), |
| 305 | (unsigned long)bfd_get_32 (abfd, buf + 64), |
| 306 | (unsigned long)bfd_get_32 (abfd, buf + 68)); |
| 307 | return TRUE; |
| 308 | case BFD_MACH_O_x86_FLOAT_STATE: |
| 309 | if (thread->size < 8) |
| 310 | return FALSE; |
| 311 | fprintf (file, " x86_FLOAT_STATE:\n"); |
| 312 | fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n", |
| 313 | (unsigned long)bfd_get_32 (abfd, buf + 0), |
| 314 | (unsigned long)bfd_get_32 (abfd, buf + 4)); |
| 315 | return TRUE; |
| 316 | case BFD_MACH_O_x86_EXCEPTION_STATE: |
| 317 | if (thread->size < 8 + 3 * 4) |
| 318 | return FALSE; |
| 319 | fprintf (file, " x86_EXCEPTION_STATE:\n"); |
| 320 | fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n", |
| 321 | (unsigned long)bfd_get_32 (abfd, buf + 0), |
| 322 | (unsigned long)bfd_get_32 (abfd, buf + 4)); |
| 323 | fprintf (file, " trapno: %08lx err: %08lx faultaddr: %08lx\n", |
| 324 | (unsigned long)bfd_get_32 (abfd, buf + 8), |
| 325 | (unsigned long)bfd_get_32 (abfd, buf + 12), |
| 326 | (unsigned long)bfd_get_32 (abfd, buf + 16)); |
| 327 | return TRUE; |
| 328 | default: |
| 329 | break; |
| 330 | } |
| 331 | return FALSE; |
| 332 | } |
| 333 | |
| 334 | static const mach_o_section_name_xlat text_section_names_xlat[] = |
| 335 | { |
| 336 | { ".symbol_stub", "__symbol_stub", |
| 337 | SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS, |
| 338 | BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, |
| 339 | 0}, |
| 340 | { ".picsymbol_stub", "__picsymbol_stub", |
| 341 | SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS, |
| 342 | BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, |
| 343 | 0}, |
| 344 | { NULL, NULL, 0, 0, 0, 0} |
| 345 | }; |
| 346 | |
| 347 | static const mach_o_section_name_xlat data_section_names_xlat[] = |
| 348 | { |
| 349 | /* The first two are recognized by i386, but not emitted for x86 by |
| 350 | modern GCC. */ |
| 351 | { ".non_lazy_symbol_pointer", "__nl_symbol_ptr", |
| 352 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS, |
| 353 | BFD_MACH_O_S_ATTR_NONE, 2}, |
| 354 | { ".lazy_symbol_pointer", "__la_symbol_ptr", |
| 355 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS, |
| 356 | BFD_MACH_O_S_ATTR_NONE, 2}, |
| 357 | { ".lazy_symbol_pointer2", "__la_sym_ptr2", |
| 358 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS, |
| 359 | BFD_MACH_O_S_ATTR_NONE, 2}, |
| 360 | { ".lazy_symbol_pointer3", "__la_sym_ptr3", |
| 361 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS, |
| 362 | BFD_MACH_O_S_ATTR_NONE, 2}, |
| 363 | { NULL, NULL, 0, 0, 0, 0} |
| 364 | }; |
| 365 | |
| 366 | static const mach_o_section_name_xlat import_section_names_xlat[] = |
| 367 | { |
| 368 | { ".picsymbol_stub3", "__jump_table", |
| 369 | SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS, |
| 370 | BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS |
| 371 | | BFD_MACH_O_S_SELF_MODIFYING_CODE, |
| 372 | 6}, |
| 373 | { ".non_lazy_symbol_pointer_x86", "__pointers", |
| 374 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS, |
| 375 | BFD_MACH_O_S_ATTR_NONE, 2}, |
| 376 | { NULL, NULL, 0, 0, 0, 0} |
| 377 | }; |
| 378 | |
| 379 | const mach_o_segment_name_xlat mach_o_i386_segsec_names_xlat[] = |
| 380 | { |
| 381 | { "__TEXT", text_section_names_xlat }, |
| 382 | { "__DATA", data_section_names_xlat }, |
| 383 | { "__IMPORT", import_section_names_xlat }, |
| 384 | { NULL, NULL } |
| 385 | }; |
| 386 | |
| 387 | #define bfd_mach_o_swap_reloc_in bfd_mach_o_i386_swap_reloc_in |
| 388 | #define bfd_mach_o_swap_reloc_out bfd_mach_o_i386_swap_reloc_out |
| 389 | #define bfd_mach_o_print_thread bfd_mach_o_i386_print_thread |
| 390 | |
| 391 | #define bfd_mach_o_tgt_seg_table mach_o_i386_segsec_names_xlat |
| 392 | #define bfd_mach_o_section_type_valid_for_tgt NULL |
| 393 | |
| 394 | #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup |
| 395 | #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup |
| 396 | |
| 397 | #define TARGET_NAME i386_mach_o_vec |
| 398 | #define TARGET_STRING "mach-o-i386" |
| 399 | #define TARGET_ARCHITECTURE bfd_arch_i386 |
| 400 | #define TARGET_PAGESIZE 4096 |
| 401 | #define TARGET_BIG_ENDIAN 0 |
| 402 | #define TARGET_ARCHIVE 0 |
| 403 | #define TARGET_PRIORITY 0 |
| 404 | #include "mach-o-target.c" |