| 1 | /* BFD back-end for Intel 386 PE IMAGE COFF files. |
| 2 | Copyright (C) 2006-2019 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 | Written by Kai Tietz, OneVision Software GmbH&CoKg. */ |
| 22 | |
| 23 | #include "sysdep.h" |
| 24 | #include "bfd.h" |
| 25 | |
| 26 | #define TARGET_SYM x86_64_pei_vec |
| 27 | #define TARGET_NAME "pei-x86-64" |
| 28 | #define COFF_IMAGE_WITH_PE |
| 29 | #define COFF_WITH_PE |
| 30 | #define COFF_WITH_pex64 |
| 31 | #define PCRELOFFSET TRUE |
| 32 | #if defined (USE_MINGW64_LEADING_UNDERSCORES) |
| 33 | #define TARGET_UNDERSCORE '_' |
| 34 | #else |
| 35 | #define TARGET_UNDERSCORE 0 |
| 36 | #endif |
| 37 | /* Long section names not allowed in executable images, only object files. */ |
| 38 | #define COFF_LONG_SECTION_NAMES 0 |
| 39 | #define COFF_SUPPORT_GNU_LINKONCE |
| 40 | #define COFF_LONG_FILENAMES |
| 41 | #define PDATA_ROW_SIZE (3 * 4) |
| 42 | |
| 43 | #define COFF_SECTION_ALIGNMENT_ENTRIES \ |
| 44 | { COFF_SECTION_NAME_EXACT_MATCH (".bss"), \ |
| 45 | COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \ |
| 46 | { COFF_SECTION_NAME_PARTIAL_MATCH (".data"), \ |
| 47 | COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \ |
| 48 | { COFF_SECTION_NAME_PARTIAL_MATCH (".rdata"), \ |
| 49 | COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \ |
| 50 | { COFF_SECTION_NAME_PARTIAL_MATCH (".text"), \ |
| 51 | COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \ |
| 52 | { COFF_SECTION_NAME_PARTIAL_MATCH (".idata"), \ |
| 53 | COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \ |
| 54 | { COFF_SECTION_NAME_EXACT_MATCH (".pdata"), \ |
| 55 | COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \ |
| 56 | { COFF_SECTION_NAME_PARTIAL_MATCH (".debug"), \ |
| 57 | COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }, \ |
| 58 | { COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.wi."), \ |
| 59 | COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 } |
| 60 | |
| 61 | /* Note we have to make sure not to include headers twice. |
| 62 | Not all headers are wrapped in #ifdef guards, so we define |
| 63 | PEI_HEADERS to prevent double including in coff-x86_64.c */ |
| 64 | #define PEI_HEADERS |
| 65 | #include "sysdep.h" |
| 66 | #include "bfd.h" |
| 67 | #include "libbfd.h" |
| 68 | #include "coff/x86_64.h" |
| 69 | #include "coff/internal.h" |
| 70 | #include "coff/pe.h" |
| 71 | #include "libcoff.h" |
| 72 | #include "libpei.h" |
| 73 | #include "libiberty.h" |
| 74 | |
| 75 | #undef AOUTSZ |
| 76 | #define AOUTSZ PEPAOUTSZ |
| 77 | #define PEAOUTHDR PEPAOUTHDR |
| 78 | |
| 79 | /* Name of registers according to SEH conventions. */ |
| 80 | |
| 81 | static const char * const pex_regs[16] = { |
| 82 | "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", |
| 83 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
| 84 | }; |
| 85 | |
| 86 | /* Swap in a runtime function. */ |
| 87 | |
| 88 | static void |
| 89 | pex64_get_runtime_function (bfd *abfd, struct pex64_runtime_function *rf, |
| 90 | const void *data) |
| 91 | { |
| 92 | const struct external_pex64_runtime_function *ex_rf = |
| 93 | (const struct external_pex64_runtime_function *) data; |
| 94 | rf->rva_BeginAddress = bfd_get_32 (abfd, ex_rf->rva_BeginAddress); |
| 95 | rf->rva_EndAddress = bfd_get_32 (abfd, ex_rf->rva_EndAddress); |
| 96 | rf->rva_UnwindData = bfd_get_32 (abfd, ex_rf->rva_UnwindData); |
| 97 | } |
| 98 | |
| 99 | /* Swap in unwind info header. */ |
| 100 | |
| 101 | static bfd_boolean |
| 102 | pex64_get_unwind_info (bfd *abfd, struct pex64_unwind_info *ui, |
| 103 | void *data, void *data_end) |
| 104 | { |
| 105 | struct external_pex64_unwind_info *ex_ui = |
| 106 | (struct external_pex64_unwind_info *) data; |
| 107 | bfd_byte *ex_dta = (bfd_byte *) data; |
| 108 | bfd_byte *ex_dta_end = (bfd_byte *) data_end; |
| 109 | |
| 110 | memset (ui, 0, sizeof (struct pex64_unwind_info)); |
| 111 | |
| 112 | if (ex_dta >= ex_dta_end || ex_dta + 4 >= ex_dta_end) |
| 113 | return FALSE; |
| 114 | |
| 115 | ui->Version = PEX64_UWI_VERSION (ex_ui->Version_Flags); |
| 116 | ui->Flags = PEX64_UWI_FLAGS (ex_ui->Version_Flags); |
| 117 | ui->SizeOfPrologue = (bfd_vma) ex_ui->SizeOfPrologue; |
| 118 | ui->CountOfCodes = (bfd_vma) ex_ui->CountOfCodes; |
| 119 | ui->FrameRegister = PEX64_UWI_FRAMEREG (ex_ui->FrameRegisterOffset); |
| 120 | ui->FrameOffset = PEX64_UWI_FRAMEOFF (ex_ui->FrameRegisterOffset); |
| 121 | ui->sizeofUnwindCodes = PEX64_UWI_SIZEOF_UWCODE_ARRAY (ui->CountOfCodes); |
| 122 | ui->SizeOfBlock = ui->sizeofUnwindCodes + 4; |
| 123 | ui->rawUnwindCodes = ex_dta + 4; |
| 124 | ui->rawUnwindCodesEnd = ex_dta_end; |
| 125 | |
| 126 | ex_dta += ui->SizeOfBlock; |
| 127 | if (ex_dta >= ex_dta_end) |
| 128 | return FALSE; |
| 129 | |
| 130 | switch (ui->Flags) |
| 131 | { |
| 132 | case UNW_FLAG_CHAININFO: |
| 133 | if (ex_dta + 12 >= ex_dta_end) |
| 134 | return FALSE; |
| 135 | ui->rva_BeginAddress = bfd_get_32 (abfd, ex_dta + 0); |
| 136 | ui->rva_EndAddress = bfd_get_32 (abfd, ex_dta + 4); |
| 137 | ui->rva_UnwindData = bfd_get_32 (abfd, ex_dta + 8); |
| 138 | ui->SizeOfBlock += 12; |
| 139 | return TRUE; |
| 140 | case UNW_FLAG_EHANDLER: |
| 141 | case UNW_FLAG_UHANDLER: |
| 142 | case UNW_FLAG_FHANDLER: |
| 143 | if (ex_dta + 4 >= ex_dta_end) |
| 144 | return FALSE; |
| 145 | ui->rva_ExceptionHandler = bfd_get_32 (abfd, ex_dta); |
| 146 | ui->SizeOfBlock += 4; |
| 147 | return TRUE; |
| 148 | default: |
| 149 | return TRUE; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | /* Display unwind codes. */ |
| 154 | |
| 155 | static void |
| 156 | pex64_xdata_print_uwd_codes (FILE *file, bfd *abfd, |
| 157 | struct pex64_unwind_info *ui, |
| 158 | struct pex64_runtime_function *rf) |
| 159 | { |
| 160 | unsigned int i; |
| 161 | unsigned int tmp; /* At least 32 bits. */ |
| 162 | int save_allowed; |
| 163 | |
| 164 | if (ui->CountOfCodes == 0 || ui->rawUnwindCodes == NULL) |
| 165 | return; |
| 166 | |
| 167 | /* According to UNWIND_CODE documentation: |
| 168 | If an FP reg is used, the any unwind code taking an offset must only be |
| 169 | used after the FP reg is established in the prolog. |
| 170 | But there are counter examples of that in system dlls... */ |
| 171 | save_allowed = TRUE; |
| 172 | |
| 173 | i = 0; |
| 174 | |
| 175 | if (ui->rawUnwindCodes + 1 >= ui->rawUnwindCodesEnd) |
| 176 | { |
| 177 | fprintf (file, _("warning: corrupt unwind data\n")); |
| 178 | return; |
| 179 | } |
| 180 | |
| 181 | if (ui->Version == 2 |
| 182 | && PEX64_UNWCODE_CODE (ui->rawUnwindCodes[1]) == UWOP_EPILOG) |
| 183 | { |
| 184 | /* Display epilog opcode (whose docoding is not fully documented). |
| 185 | Looks to be designed to speed-up unwinding, as there is no need |
| 186 | to decode instruction flow if outside an epilog. */ |
| 187 | unsigned int func_size = rf->rva_EndAddress - rf->rva_BeginAddress; |
| 188 | |
| 189 | if (ui->rawUnwindCodes + 1 + (ui->CountOfCodes * 2) >= ui->rawUnwindCodesEnd) |
| 190 | { |
| 191 | fprintf (file, _("warning: corrupt unwind data\n")); |
| 192 | return; |
| 193 | } |
| 194 | |
| 195 | fprintf (file, "\tv2 epilog (length: %02x) at pc+:", |
| 196 | ui->rawUnwindCodes[0]); |
| 197 | |
| 198 | if (PEX64_UNWCODE_INFO (ui->rawUnwindCodes[1])) |
| 199 | fprintf (file, " 0x%x", func_size - ui->rawUnwindCodes[0]); |
| 200 | |
| 201 | i++; |
| 202 | for (; i < ui->CountOfCodes; i++) |
| 203 | { |
| 204 | const bfd_byte *dta = ui->rawUnwindCodes + 2 * i; |
| 205 | unsigned int off; |
| 206 | |
| 207 | if (PEX64_UNWCODE_CODE (dta[1]) != UWOP_EPILOG) |
| 208 | break; |
| 209 | off = dta[0] | (PEX64_UNWCODE_INFO (dta[1]) << 8); |
| 210 | if (off == 0) |
| 211 | fprintf (file, " [pad]"); |
| 212 | else |
| 213 | fprintf (file, " 0x%x", func_size - off); |
| 214 | } |
| 215 | fputc ('\n', file); |
| 216 | } |
| 217 | |
| 218 | if (ui->rawUnwindCodes + 2 + (ui->CountOfCodes * 2) >= ui->rawUnwindCodesEnd) |
| 219 | { |
| 220 | fprintf (file, _("warning: corrupt unwind data\n")); |
| 221 | return; |
| 222 | } |
| 223 | |
| 224 | for (; i < ui->CountOfCodes; i++) |
| 225 | { |
| 226 | const bfd_byte *dta = ui->rawUnwindCodes + 2 * i; |
| 227 | unsigned int info = PEX64_UNWCODE_INFO (dta[1]); |
| 228 | int unexpected = FALSE; |
| 229 | |
| 230 | fprintf (file, "\t pc+0x%02x: ", (unsigned int) dta[0]); |
| 231 | |
| 232 | switch (PEX64_UNWCODE_CODE (dta[1])) |
| 233 | { |
| 234 | case UWOP_PUSH_NONVOL: |
| 235 | fprintf (file, "push %s", pex_regs[info]); |
| 236 | break; |
| 237 | |
| 238 | case UWOP_ALLOC_LARGE: |
| 239 | if (info == 0) |
| 240 | { |
| 241 | if (dta + 4 > ui->rawUnwindCodesEnd) |
| 242 | { |
| 243 | fprintf (file, _("warning: corrupt unwind data\n")); |
| 244 | return; |
| 245 | } |
| 246 | tmp = bfd_get_16 (abfd, dta + 2) * 8; |
| 247 | i++; |
| 248 | } |
| 249 | else |
| 250 | { |
| 251 | if (dta + 6 > ui->rawUnwindCodesEnd) |
| 252 | { |
| 253 | fprintf (file, _("warning: corrupt unwind data\n")); |
| 254 | return; |
| 255 | } |
| 256 | tmp = bfd_get_32 (abfd, dta + 2); |
| 257 | i += 2; |
| 258 | } |
| 259 | fprintf (file, "alloc large area: rsp = rsp - 0x%x", tmp); |
| 260 | break; |
| 261 | |
| 262 | case UWOP_ALLOC_SMALL: |
| 263 | fprintf (file, "alloc small area: rsp = rsp - 0x%x", (info + 1) * 8); |
| 264 | break; |
| 265 | |
| 266 | case UWOP_SET_FPREG: |
| 267 | /* According to the documentation, info field is unused. */ |
| 268 | fprintf (file, "FPReg: %s = rsp + 0x%x (info = 0x%x)", |
| 269 | pex_regs[ui->FrameRegister], |
| 270 | (unsigned int) ui->FrameOffset * 16, info); |
| 271 | unexpected = ui->FrameRegister == 0; |
| 272 | save_allowed = FALSE; |
| 273 | break; |
| 274 | |
| 275 | case UWOP_SAVE_NONVOL: |
| 276 | if (dta + 4 > ui->rawUnwindCodesEnd) |
| 277 | { |
| 278 | fprintf (file, _("warning: corrupt unwind data\n")); |
| 279 | return; |
| 280 | } |
| 281 | tmp = bfd_get_16 (abfd, dta + 2) * 8; |
| 282 | i++; |
| 283 | fprintf (file, "save %s at rsp + 0x%x", pex_regs[info], tmp); |
| 284 | unexpected = !save_allowed; |
| 285 | break; |
| 286 | |
| 287 | case UWOP_SAVE_NONVOL_FAR: |
| 288 | if (dta + 6 > ui->rawUnwindCodesEnd) |
| 289 | { |
| 290 | fprintf (file, _("warning: corrupt unwind data\n")); |
| 291 | return; |
| 292 | } |
| 293 | tmp = bfd_get_32 (abfd, dta + 2); |
| 294 | i += 2; |
| 295 | fprintf (file, "save %s at rsp + 0x%x", pex_regs[info], tmp); |
| 296 | unexpected = !save_allowed; |
| 297 | break; |
| 298 | |
| 299 | case UWOP_SAVE_XMM: |
| 300 | if (ui->Version == 1) |
| 301 | { |
| 302 | if (dta + 4 > ui->rawUnwindCodesEnd) |
| 303 | { |
| 304 | fprintf (file, _("warning: corrupt unwind data\n")); |
| 305 | return; |
| 306 | } |
| 307 | tmp = bfd_get_16 (abfd, dta + 2) * 8; |
| 308 | i++; |
| 309 | fprintf (file, "save mm%u at rsp + 0x%x", info, tmp); |
| 310 | unexpected = !save_allowed; |
| 311 | } |
| 312 | else if (ui->Version == 2) |
| 313 | { |
| 314 | fprintf (file, "epilog %02x %01x", dta[0], info); |
| 315 | unexpected = TRUE; |
| 316 | } |
| 317 | break; |
| 318 | |
| 319 | case UWOP_SAVE_XMM_FAR: |
| 320 | if (dta + 6 > ui->rawUnwindCodesEnd) |
| 321 | { |
| 322 | fprintf (file, _("warning: corrupt unwind data\n")); |
| 323 | return; |
| 324 | } |
| 325 | tmp = bfd_get_32 (abfd, dta + 2) * 8; |
| 326 | i += 2; |
| 327 | fprintf (file, "save mm%u at rsp + 0x%x", info, tmp); |
| 328 | unexpected = !save_allowed; |
| 329 | break; |
| 330 | |
| 331 | case UWOP_SAVE_XMM128: |
| 332 | if (dta + 4 > ui->rawUnwindCodesEnd) |
| 333 | { |
| 334 | fprintf (file, _("warning: corrupt unwind data\n")); |
| 335 | return; |
| 336 | } |
| 337 | tmp = bfd_get_16 (abfd, dta + 2) * 16; |
| 338 | i++; |
| 339 | fprintf (file, "save xmm%u at rsp + 0x%x", info, tmp); |
| 340 | unexpected = !save_allowed; |
| 341 | break; |
| 342 | |
| 343 | case UWOP_SAVE_XMM128_FAR: |
| 344 | if (dta + 6 > ui->rawUnwindCodesEnd) |
| 345 | { |
| 346 | fprintf (file, _("warning: corrupt unwind data\n")); |
| 347 | return; |
| 348 | } |
| 349 | tmp = bfd_get_32 (abfd, dta + 2) * 16; |
| 350 | i += 2; |
| 351 | fprintf (file, "save xmm%u at rsp + 0x%x", info, tmp); |
| 352 | unexpected = !save_allowed; |
| 353 | break; |
| 354 | |
| 355 | case UWOP_PUSH_MACHFRAME: |
| 356 | fprintf (file, "interrupt entry (SS, old RSP, EFLAGS, CS, RIP"); |
| 357 | if (info == 0) |
| 358 | fprintf (file, ")"); |
| 359 | else if (info == 1) |
| 360 | fprintf (file, ",ErrorCode)"); |
| 361 | else |
| 362 | fprintf (file, ", unknown(%u))", info); |
| 363 | break; |
| 364 | |
| 365 | default: |
| 366 | /* PR 17512: file: 2245-7442-0.004. */ |
| 367 | fprintf (file, _("Unknown: %x"), PEX64_UNWCODE_CODE (dta[1])); |
| 368 | break; |
| 369 | } |
| 370 | |
| 371 | if (unexpected) |
| 372 | fprintf (file, " [Unexpected!]"); |
| 373 | fputc ('\n', file); |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | /* Check wether section SEC_NAME contains the xdata at address ADDR. */ |
| 378 | |
| 379 | static asection * |
| 380 | pex64_get_section_by_rva (bfd *abfd, bfd_vma addr, const char *sec_name) |
| 381 | { |
| 382 | asection *section = bfd_get_section_by_name (abfd, sec_name); |
| 383 | bfd_vma vsize; |
| 384 | bfd_size_type datasize = 0; |
| 385 | |
| 386 | if (section == NULL |
| 387 | || coff_section_data (abfd, section) == NULL |
| 388 | || pei_section_data (abfd, section) == NULL) |
| 389 | return NULL; |
| 390 | vsize = section->vma - pe_data (abfd)->pe_opthdr.ImageBase; |
| 391 | datasize = section->size; |
| 392 | if (!datasize || vsize > addr || (vsize + datasize) < addr) |
| 393 | return NULL; |
| 394 | return section; |
| 395 | } |
| 396 | |
| 397 | /* Dump xdata at for function RF to FILE. The argument XDATA_SECTION |
| 398 | designate the bfd section containing the xdata, XDATA is its content, |
| 399 | and ENDX the size if known (or NULL). */ |
| 400 | |
| 401 | static void |
| 402 | pex64_dump_xdata (FILE *file, bfd *abfd, |
| 403 | asection *xdata_section, bfd_byte *xdata, bfd_vma *endx, |
| 404 | struct pex64_runtime_function *rf) |
| 405 | { |
| 406 | bfd_vma vaddr; |
| 407 | bfd_vma end_addr; |
| 408 | bfd_vma addr = rf->rva_UnwindData; |
| 409 | bfd_size_type sec_size = xdata_section->rawsize > 0 ? xdata_section->rawsize : xdata_section->size; |
| 410 | struct pex64_unwind_info ui; |
| 411 | |
| 412 | vaddr = xdata_section->vma - pe_data (abfd)->pe_opthdr.ImageBase; |
| 413 | addr -= vaddr; |
| 414 | |
| 415 | /* PR 17512: file: 2245-7442-0.004. */ |
| 416 | if (addr >= sec_size) |
| 417 | { |
| 418 | fprintf (file, _("warning: xdata section corrupt\n")); |
| 419 | return; |
| 420 | } |
| 421 | |
| 422 | if (endx) |
| 423 | { |
| 424 | end_addr = endx[0] - vaddr; |
| 425 | /* PR 17512: file: 2245-7442-0.004. */ |
| 426 | if (end_addr > sec_size) |
| 427 | { |
| 428 | fprintf (file, _("warning: xdata section corrupt\n")); |
| 429 | end_addr = sec_size; |
| 430 | } |
| 431 | } |
| 432 | else |
| 433 | end_addr = sec_size; |
| 434 | |
| 435 | if (! pex64_get_unwind_info (abfd, &ui, xdata + addr, xdata + end_addr)) |
| 436 | { |
| 437 | fprintf (file, _("warning: xdata section corrupt\n")); |
| 438 | return; |
| 439 | } |
| 440 | |
| 441 | if (ui.Version != 1 && ui.Version != 2) |
| 442 | { |
| 443 | unsigned int i; |
| 444 | fprintf (file, "\tVersion %u (unknown).\n", |
| 445 | (unsigned int) ui.Version); |
| 446 | for (i = 0; addr < end_addr; addr += 1, i++) |
| 447 | { |
| 448 | if ((i & 15) == 0) |
| 449 | fprintf (file, "\t %03x:", i); |
| 450 | fprintf (file, " %02x", xdata[addr]); |
| 451 | if ((i & 15) == 15) |
| 452 | fprintf (file, "\n"); |
| 453 | } |
| 454 | if ((i & 15) != 0) |
| 455 | fprintf (file, "\n"); |
| 456 | return; |
| 457 | } |
| 458 | |
| 459 | fprintf (file, "\tVersion: %d, Flags: ", ui.Version); |
| 460 | switch (ui.Flags) |
| 461 | { |
| 462 | case UNW_FLAG_NHANDLER: |
| 463 | fprintf (file, "none"); |
| 464 | break; |
| 465 | case UNW_FLAG_EHANDLER: |
| 466 | fprintf (file, "UNW_FLAG_EHANDLER"); |
| 467 | break; |
| 468 | case UNW_FLAG_UHANDLER: |
| 469 | fprintf (file, "UNW_FLAG_UHANDLER"); |
| 470 | break; |
| 471 | case UNW_FLAG_FHANDLER: |
| 472 | fprintf |
| 473 | (file, "UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER"); |
| 474 | break; |
| 475 | case UNW_FLAG_CHAININFO: |
| 476 | fprintf (file, "UNW_FLAG_CHAININFO"); |
| 477 | break; |
| 478 | default: |
| 479 | fprintf (file, "unknown flags value 0x%x", (unsigned int) ui.Flags); |
| 480 | break; |
| 481 | } |
| 482 | fputc ('\n', file); |
| 483 | fprintf (file, "\tNbr codes: %u, ", (unsigned int) ui.CountOfCodes); |
| 484 | fprintf (file, "Prologue size: 0x%02x, Frame offset: 0x%x, ", |
| 485 | (unsigned int) ui.SizeOfPrologue, (unsigned int) ui.FrameOffset); |
| 486 | fprintf (file, "Frame reg: %s\n", |
| 487 | ui.FrameRegister == 0 ? "none" |
| 488 | : pex_regs[(unsigned int) ui.FrameRegister]); |
| 489 | |
| 490 | /* PR 17512: file: 2245-7442-0.004. */ |
| 491 | if (ui.CountOfCodes * 2 + ui.rawUnwindCodes > xdata + xdata_section->size) |
| 492 | fprintf (file, _("Too many unwind codes (%ld)\n"), (long) ui.CountOfCodes); |
| 493 | else |
| 494 | pex64_xdata_print_uwd_codes (file, abfd, &ui, rf); |
| 495 | |
| 496 | switch (ui.Flags) |
| 497 | { |
| 498 | case UNW_FLAG_EHANDLER: |
| 499 | case UNW_FLAG_UHANDLER: |
| 500 | case UNW_FLAG_FHANDLER: |
| 501 | fprintf (file, "\tHandler: "); |
| 502 | fprintf_vma (file, (ui.rva_ExceptionHandler |
| 503 | + pe_data (abfd)->pe_opthdr.ImageBase)); |
| 504 | fprintf (file, ".\n"); |
| 505 | break; |
| 506 | case UNW_FLAG_CHAININFO: |
| 507 | fprintf (file, "\tChain: start: "); |
| 508 | fprintf_vma (file, ui.rva_BeginAddress); |
| 509 | fprintf (file, ", end: "); |
| 510 | fprintf_vma (file, ui.rva_EndAddress); |
| 511 | fprintf (file, "\n\t unwind data: "); |
| 512 | fprintf_vma (file, ui.rva_UnwindData); |
| 513 | fprintf (file, ".\n"); |
| 514 | break; |
| 515 | } |
| 516 | |
| 517 | /* Now we need end of this xdata block. */ |
| 518 | addr += ui.SizeOfBlock; |
| 519 | if (addr < end_addr) |
| 520 | { |
| 521 | unsigned int i; |
| 522 | fprintf (file,"\tUser data:\n"); |
| 523 | for (i = 0; addr < end_addr; addr += 1, i++) |
| 524 | { |
| 525 | if ((i & 15) == 0) |
| 526 | fprintf (file, "\t %03x:", i); |
| 527 | fprintf (file, " %02x", xdata[addr]); |
| 528 | if ((i & 15) == 15) |
| 529 | fprintf (file, "\n"); |
| 530 | } |
| 531 | if ((i & 15) != 0) |
| 532 | fprintf (file, "\n"); |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | /* Helper function to sort xdata. The entries of xdata are sorted to know |
| 537 | the size of each entry. */ |
| 538 | |
| 539 | static int |
| 540 | sort_xdata_arr (const void *l, const void *r) |
| 541 | { |
| 542 | const bfd_vma *lp = (const bfd_vma *) l; |
| 543 | const bfd_vma *rp = (const bfd_vma *) r; |
| 544 | |
| 545 | if (*lp == *rp) |
| 546 | return 0; |
| 547 | return (*lp < *rp ? -1 : 1); |
| 548 | } |
| 549 | |
| 550 | /* Display unwind tables for x86-64. */ |
| 551 | |
| 552 | static bfd_boolean |
| 553 | pex64_bfd_print_pdata_section (bfd *abfd, void *vfile, asection *pdata_section) |
| 554 | { |
| 555 | FILE *file = (FILE *) vfile; |
| 556 | bfd_byte *pdata = NULL; |
| 557 | bfd_byte *xdata = NULL; |
| 558 | asection *xdata_section = NULL; |
| 559 | bfd_vma xdata_base; |
| 560 | bfd_size_type i; |
| 561 | bfd_size_type datasize; |
| 562 | bfd_size_type stop; |
| 563 | bfd_vma prev_beginaddress = (bfd_vma) -1; |
| 564 | bfd_vma prev_unwinddata_rva = (bfd_vma) -1; |
| 565 | bfd_vma imagebase; |
| 566 | int onaline = PDATA_ROW_SIZE; |
| 567 | int seen_error = 0; |
| 568 | bfd_vma *xdata_arr = NULL; |
| 569 | int xdata_arr_cnt; |
| 570 | bfd_boolean virt_size_is_zero = FALSE; |
| 571 | |
| 572 | /* Sanity checks. */ |
| 573 | if (pdata_section == NULL |
| 574 | || coff_section_data (abfd, pdata_section) == NULL |
| 575 | || pei_section_data (abfd, pdata_section) == NULL) |
| 576 | return TRUE; |
| 577 | |
| 578 | stop = pei_section_data (abfd, pdata_section)->virt_size; |
| 579 | if ((stop % onaline) != 0) |
| 580 | fprintf (file, |
| 581 | /* xgettext:c-format */ |
| 582 | _("Warning: %s section size (%ld) is not a multiple of %d\n"), |
| 583 | pdata_section->name, (long) stop, onaline); |
| 584 | |
| 585 | datasize = pdata_section->size; |
| 586 | if (datasize == 0) |
| 587 | { |
| 588 | if (stop) |
| 589 | fprintf (file, _("Warning: %s section size is zero\n"), |
| 590 | pdata_section->name); |
| 591 | return TRUE; |
| 592 | } |
| 593 | |
| 594 | /* virt_size might be zero for objects. */ |
| 595 | if (stop == 0 && strcmp (abfd->xvec->name, "pe-x86-64") == 0) |
| 596 | { |
| 597 | stop = datasize; |
| 598 | virt_size_is_zero = TRUE; |
| 599 | } |
| 600 | else if (datasize < stop) |
| 601 | { |
| 602 | fprintf (file, |
| 603 | /* xgettext:c-format */ |
| 604 | _("Warning: %s section size (%ld) is smaller than virtual size (%ld)\n"), |
| 605 | pdata_section->name, (unsigned long) datasize, |
| 606 | (unsigned long) stop); |
| 607 | /* Be sure not to read past datasize. */ |
| 608 | stop = datasize; |
| 609 | } |
| 610 | |
| 611 | /* Display functions table. */ |
| 612 | fprintf (file, |
| 613 | _("\nThe Function Table (interpreted %s section contents)\n"), |
| 614 | pdata_section->name); |
| 615 | |
| 616 | fprintf (file, _("vma:\t\t\tBeginAddress\t EndAddress\t UnwindData\n")); |
| 617 | |
| 618 | if (!bfd_malloc_and_get_section (abfd, pdata_section, &pdata)) |
| 619 | goto done; |
| 620 | |
| 621 | /* Table of xdata entries. */ |
| 622 | xdata_arr = (bfd_vma *) xmalloc (sizeof (bfd_vma) * ((stop / onaline) + 1)); |
| 623 | xdata_arr_cnt = 0; |
| 624 | |
| 625 | if (strcmp (abfd->xvec->name, "pei-x86-64") == 0) |
| 626 | imagebase = pe_data (abfd)->pe_opthdr.ImageBase; |
| 627 | else |
| 628 | imagebase = 0; |
| 629 | |
| 630 | for (i = 0; i < stop; i += onaline) |
| 631 | { |
| 632 | struct pex64_runtime_function rf; |
| 633 | |
| 634 | if (i + PDATA_ROW_SIZE > stop) |
| 635 | break; |
| 636 | |
| 637 | pex64_get_runtime_function (abfd, &rf, &pdata[i]); |
| 638 | |
| 639 | if (rf.rva_BeginAddress == 0 && rf.rva_EndAddress == 0 |
| 640 | && rf.rva_UnwindData == 0) |
| 641 | /* We are probably into the padding of the section now. */ |
| 642 | break; |
| 643 | fputc (' ', file); |
| 644 | fprintf_vma (file, i + pdata_section->vma); |
| 645 | fprintf (file, ":\t"); |
| 646 | fprintf_vma (file, imagebase + rf.rva_BeginAddress); |
| 647 | fprintf (file, " "); |
| 648 | fprintf_vma (file, imagebase + rf.rva_EndAddress); |
| 649 | fprintf (file, " "); |
| 650 | fprintf_vma (file, imagebase + rf.rva_UnwindData); |
| 651 | fprintf (file, "\n"); |
| 652 | if (i != 0 && rf.rva_BeginAddress <= prev_beginaddress) |
| 653 | { |
| 654 | seen_error = 1; |
| 655 | fprintf (file, " has %s begin address as predecessor\n", |
| 656 | (rf.rva_BeginAddress < prev_beginaddress ? "smaller" : "same")); |
| 657 | } |
| 658 | prev_beginaddress = rf.rva_BeginAddress; |
| 659 | /* Now we check for negative addresses. */ |
| 660 | if ((prev_beginaddress & 0x80000000) != 0) |
| 661 | { |
| 662 | seen_error = 1; |
| 663 | fprintf (file, " has negative begin address\n"); |
| 664 | } |
| 665 | if ((rf.rva_EndAddress & 0x80000000) != 0) |
| 666 | { |
| 667 | seen_error = 1; |
| 668 | fprintf (file, " has negative end address\n"); |
| 669 | } |
| 670 | if ((rf.rva_UnwindData & 0x80000000) != 0) |
| 671 | { |
| 672 | seen_error = 1; |
| 673 | fprintf (file, " has negative unwind address\n"); |
| 674 | } |
| 675 | else if ((rf.rva_UnwindData && !PEX64_IS_RUNTIME_FUNCTION_CHAINED (&rf)) |
| 676 | || virt_size_is_zero) |
| 677 | xdata_arr[xdata_arr_cnt++] = rf.rva_UnwindData; |
| 678 | } |
| 679 | |
| 680 | if (seen_error) |
| 681 | goto done; |
| 682 | |
| 683 | /* Add end of list marker. */ |
| 684 | xdata_arr[xdata_arr_cnt++] = ~((bfd_vma) 0); |
| 685 | |
| 686 | /* Sort start RVAs of xdata. */ |
| 687 | if (xdata_arr_cnt > 1) |
| 688 | qsort (xdata_arr, (size_t) xdata_arr_cnt, sizeof (bfd_vma), |
| 689 | sort_xdata_arr); |
| 690 | |
| 691 | /* Find the section containing the unwind data (.xdata). */ |
| 692 | xdata_base = xdata_arr[0]; |
| 693 | /* For sections with long names, first look for the same |
| 694 | section name, replacing .pdata by .xdata prefix. */ |
| 695 | if (strcmp (pdata_section->name, ".pdata") != 0) |
| 696 | { |
| 697 | size_t len = strlen (pdata_section->name); |
| 698 | char *xdata_name = xmalloc (len + 1); |
| 699 | |
| 700 | xdata_name = memcpy (xdata_name, pdata_section->name, len + 1); |
| 701 | /* Transform .pdata prefix into .xdata prefix. */ |
| 702 | if (len > 1) |
| 703 | xdata_name [1] = 'x'; |
| 704 | xdata_section = pex64_get_section_by_rva (abfd, xdata_base, |
| 705 | xdata_name); |
| 706 | free (xdata_name); |
| 707 | } |
| 708 | /* Second, try the .xdata section itself. */ |
| 709 | if (!xdata_section) |
| 710 | xdata_section = pex64_get_section_by_rva (abfd, xdata_base, ".xdata"); |
| 711 | /* Otherwise, if xdata_base is non zero, search also inside |
| 712 | other standard sections. */ |
| 713 | if (!xdata_section && xdata_base) |
| 714 | xdata_section = pex64_get_section_by_rva (abfd, xdata_base, ".rdata"); |
| 715 | if (!xdata_section && xdata_base) |
| 716 | xdata_section = pex64_get_section_by_rva (abfd, xdata_base, ".data"); |
| 717 | if (!xdata_section && xdata_base) |
| 718 | xdata_section = pex64_get_section_by_rva (abfd, xdata_base, ".pdata"); |
| 719 | if (!xdata_section && xdata_base) |
| 720 | xdata_section = pex64_get_section_by_rva (abfd, xdata_base, ".text"); |
| 721 | /* Transfer xdata section into xdata array. */ |
| 722 | if (!xdata_section |
| 723 | || !bfd_malloc_and_get_section (abfd, xdata_section, &xdata)) |
| 724 | goto done; |
| 725 | |
| 726 | /* Avoid "also used "... ouput for single unwind info |
| 727 | in object file. */ |
| 728 | prev_unwinddata_rva = (bfd_vma) -1; |
| 729 | |
| 730 | /* Do dump of pdata related xdata. */ |
| 731 | for (i = 0; i < stop; i += onaline) |
| 732 | { |
| 733 | struct pex64_runtime_function rf; |
| 734 | |
| 735 | if (i + PDATA_ROW_SIZE > stop) |
| 736 | break; |
| 737 | |
| 738 | pex64_get_runtime_function (abfd, &rf, &pdata[i]); |
| 739 | |
| 740 | if (rf.rva_BeginAddress == 0 && rf.rva_EndAddress == 0 |
| 741 | && rf.rva_UnwindData == 0) |
| 742 | /* We are probably into the padding of the section now. */ |
| 743 | break; |
| 744 | if (i == 0) |
| 745 | fprintf (file, _("\nDump of %s\n"), xdata_section->name); |
| 746 | |
| 747 | fputc (' ', file); |
| 748 | fprintf_vma (file, rf.rva_UnwindData + imagebase); |
| 749 | |
| 750 | if (prev_unwinddata_rva == rf.rva_UnwindData) |
| 751 | { |
| 752 | /* Do not dump again the xdata for the same entry. */ |
| 753 | fprintf (file, " also used for function at "); |
| 754 | fprintf_vma (file, rf.rva_BeginAddress + imagebase); |
| 755 | fputc ('\n', file); |
| 756 | continue; |
| 757 | } |
| 758 | else |
| 759 | prev_unwinddata_rva = rf.rva_UnwindData; |
| 760 | |
| 761 | fprintf (file, " (rva: %08x): ", |
| 762 | (unsigned int) rf.rva_UnwindData); |
| 763 | fprintf_vma (file, rf.rva_BeginAddress + imagebase); |
| 764 | fprintf (file, " - "); |
| 765 | fprintf_vma (file, rf.rva_EndAddress + imagebase); |
| 766 | fputc ('\n', file); |
| 767 | |
| 768 | if (rf.rva_UnwindData != 0 || virt_size_is_zero) |
| 769 | { |
| 770 | if (PEX64_IS_RUNTIME_FUNCTION_CHAINED (&rf)) |
| 771 | { |
| 772 | bfd_vma altent = PEX64_GET_UNWINDDATA_UNIFIED_RVA (&rf); |
| 773 | bfd_vma pdata_vma = bfd_section_vma (pdata_section); |
| 774 | struct pex64_runtime_function arf; |
| 775 | |
| 776 | fprintf (file, "\t shares information with "); |
| 777 | altent += imagebase; |
| 778 | |
| 779 | if (altent >= pdata_vma |
| 780 | && altent - pdata_vma + PDATA_ROW_SIZE <= stop) |
| 781 | { |
| 782 | pex64_get_runtime_function |
| 783 | (abfd, &arf, &pdata[altent - pdata_vma]); |
| 784 | fprintf (file, "pdata element at 0x"); |
| 785 | fprintf_vma (file, arf.rva_UnwindData); |
| 786 | } |
| 787 | else |
| 788 | fprintf (file, "unknown pdata element"); |
| 789 | fprintf (file, ".\n"); |
| 790 | } |
| 791 | else |
| 792 | { |
| 793 | bfd_vma *p; |
| 794 | |
| 795 | /* Search for the current entry in the sorted array. */ |
| 796 | p = (bfd_vma *) |
| 797 | bsearch (&rf.rva_UnwindData, xdata_arr, |
| 798 | (size_t) xdata_arr_cnt, sizeof (bfd_vma), |
| 799 | sort_xdata_arr); |
| 800 | |
| 801 | /* Advance to the next pointer into the xdata section. We may |
| 802 | have shared xdata entries, which will result in a string of |
| 803 | identical pointers in the array; advance past all of them. */ |
| 804 | while (p[0] <= rf.rva_UnwindData) |
| 805 | ++p; |
| 806 | |
| 807 | if (p[0] == ~((bfd_vma) 0)) |
| 808 | p = NULL; |
| 809 | |
| 810 | pex64_dump_xdata (file, abfd, xdata_section, xdata, p, &rf); |
| 811 | } |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | done: |
| 816 | free (pdata); |
| 817 | free (xdata_arr); |
| 818 | free (xdata); |
| 819 | |
| 820 | return TRUE; |
| 821 | } |
| 822 | |
| 823 | /* Static counter of number of found pdata sections. */ |
| 824 | static bfd_boolean pdata_count; |
| 825 | |
| 826 | /* Functionn prototype. */ |
| 827 | bfd_boolean pex64_bfd_print_pdata (bfd *, void *); |
| 828 | |
| 829 | /* Helper function for bfd_map_over_section. */ |
| 830 | static void |
| 831 | pex64_print_all_pdata_sections (bfd *abfd, asection *pdata, void *obj) |
| 832 | { |
| 833 | if (CONST_STRNEQ (pdata->name, ".pdata")) |
| 834 | { |
| 835 | if (pex64_bfd_print_pdata_section (abfd, obj, pdata)) |
| 836 | pdata_count++; |
| 837 | } |
| 838 | } |
| 839 | |
| 840 | bfd_boolean |
| 841 | pex64_bfd_print_pdata (bfd *abfd, void *vfile) |
| 842 | { |
| 843 | asection *pdata_section = bfd_get_section_by_name (abfd, ".pdata"); |
| 844 | |
| 845 | if (pdata_section) |
| 846 | return pex64_bfd_print_pdata_section (abfd, vfile, pdata_section); |
| 847 | |
| 848 | pdata_count = 0; |
| 849 | bfd_map_over_sections (abfd, pex64_print_all_pdata_sections, vfile); |
| 850 | return (pdata_count > 0); |
| 851 | } |
| 852 | |
| 853 | #define bfd_pe_print_pdata pex64_bfd_print_pdata |
| 854 | #define bfd_coff_std_swap_table bfd_coff_pei_swap_table |
| 855 | |
| 856 | #include "coff-x86_64.c" |