1 /* Intel i386 Mach-O support for BFD. 2 Copyright (C) 2009-2014 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 "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" 405
