bfd/pei-x86_64.c

   1 /* BFD back-end for Intel 386 PE IMAGE COFF files.
   2    Copyright (C) 2006-2024 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 #include "sysdep.h"
  62 #include "bfd.h"
  63 #include "libbfd.h"
  64 #include "coff/x86_64.h"
  65 #include "coff/internal.h"
  66 #include "coff/pe.h"
  67 #include "libcoff.h"
  68 #include "libpei.h"
  69 #include "libiberty.h"
  70
  71 #undef AOUTSZ
  72 #define AOUTSZ          PEPAOUTSZ
  73 #define PEAOUTHDR       PEPAOUTHDR
  74
  75 /* Name of registers according to SEH conventions.  */
  76
  77 static const char * const pex_regs[16] = {
  78   "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
  79   "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
  80 };
  81
  82 /* Swap in a runtime function.  */
  83
  84 static void
  85 pex64_get_runtime_function (bfd *abfd, struct pex64_runtime_function *rf,
  86                             const void *data)
  87 {
  88   const struct external_pex64_runtime_function *ex_rf =
  89     (const struct external_pex64_runtime_function *) data;
  90   rf->rva_BeginAddress = bfd_get_32 (abfd, ex_rf->rva_BeginAddress);
  91   rf->rva_EndAddress = bfd_get_32 (abfd, ex_rf->rva_EndAddress);
  92   rf->rva_UnwindData =  bfd_get_32 (abfd, ex_rf->rva_UnwindData);
  93 }
  94
  95 /* Swap in unwind info header.  */
  96
  97 static bool
  98 pex64_get_unwind_info (bfd *abfd, struct pex64_unwind_info *ui,
  99                        void *data, void *data_end)
 100 {
 101   struct external_pex64_unwind_info *ex_ui =
 102     (struct external_pex64_unwind_info *) data;
 103   bfd_byte *ex_dta = (bfd_byte *) data;
 104   bfd_byte *ex_dta_end = (bfd_byte *) data_end;
 105
 106   memset (ui, 0, sizeof (struct pex64_unwind_info));
 107
 108   if (ex_dta_end - ex_dta < 4)
 109     return false;
 110
 111   ui->Version = PEX64_UWI_VERSION (ex_ui->Version_Flags);
 112   ui->Flags = PEX64_UWI_FLAGS (ex_ui->Version_Flags);
 113   ui->SizeOfPrologue = (bfd_vma) ex_ui->SizeOfPrologue;
 114   ui->CountOfCodes = (bfd_vma) ex_ui->CountOfCodes;
 115   ui->FrameRegister = PEX64_UWI_FRAMEREG (ex_ui->FrameRegisterOffset);
 116   ui->FrameOffset = PEX64_UWI_FRAMEOFF (ex_ui->FrameRegisterOffset);
 117   ui->sizeofUnwindCodes = PEX64_UWI_SIZEOF_UWCODE_ARRAY (ui->CountOfCodes);
 118   ui->SizeOfBlock = ui->sizeofUnwindCodes + 4;
 119   ui->rawUnwindCodes = ex_dta + 4;
 120   ui->rawUnwindCodesEnd = ex_dta_end;
 121
 122   if ((size_t) (ex_dta_end - ex_dta) < ui->SizeOfBlock)
 123     return false;
 124   ex_dta += ui->SizeOfBlock;
 125
 126   switch (ui->Flags)
 127     {
 128     case UNW_FLAG_CHAININFO:
 129       if (ex_dta_end - ex_dta < 12)
 130         return false;
 131       ui->rva_BeginAddress = bfd_get_32 (abfd, ex_dta + 0);
 132       ui->rva_EndAddress = bfd_get_32 (abfd, ex_dta + 4);
 133       ui->rva_UnwindData = bfd_get_32 (abfd, ex_dta + 8);
 134       ui->SizeOfBlock += 12;
 135       return true;
 136     case UNW_FLAG_EHANDLER:
 137     case UNW_FLAG_UHANDLER:
 138     case UNW_FLAG_FHANDLER:
 139       if (ex_dta_end - ex_dta < 4)
 140         return false;
 141       ui->rva_ExceptionHandler = bfd_get_32 (abfd, ex_dta);
 142       ui->SizeOfBlock += 4;
 143       return true;
 144     default:
 145       return true;
 146     }
 147 }
 148
 149 /* Display unwind codes.  */
 150
 151 static void
 152 pex64_xdata_print_uwd_codes (FILE *file, bfd *abfd,
 153                              struct pex64_unwind_info *ui,
 154                              struct pex64_runtime_function *rf)
 155 {
 156   unsigned int i;
 157   unsigned int tmp; /* At least 32 bits.  */
 158   int save_allowed;
 159
 160   if (ui->CountOfCodes == 0 || ui->rawUnwindCodes == NULL)
 161     return;
 162
 163   /* According to UNWIND_CODE documentation:
 164       If an FP reg is used, the any unwind code taking an offset must only be
 165       used after the FP reg is established in the prolog.
 166      But there are counter examples of that in system dlls...  */
 167   save_allowed = true;
 168
 169   i = 0;
 170
 171   if ((size_t) (ui->rawUnwindCodesEnd - ui->rawUnwindCodes)
 172       < ui->CountOfCodes * 2)
 173     {
 174       fprintf (file, _("warning: corrupt unwind data\n"));
 175       return;
 176     }
 177
 178   if (ui->Version == 2
 179       && PEX64_UNWCODE_CODE (ui->rawUnwindCodes[1]) == UWOP_EPILOG)
 180     {
 181       /* Display epilog opcode (whose docoding is not fully documented).
 182          Looks to be designed to speed-up unwinding, as there is no need
 183          to decode instruction flow if outside an epilog.  */
 184       unsigned int func_size = rf->rva_EndAddress - rf->rva_BeginAddress;
 185
 186       fprintf (file, "\tv2 epilog (length: %02x) at pc+:",
 187                ui->rawUnwindCodes[0]);
 188
 189       if (PEX64_UNWCODE_INFO (ui->rawUnwindCodes[1]))
 190         fprintf (file, " 0x%x", func_size - ui->rawUnwindCodes[0]);
 191
 192       i++;
 193       for (; i < ui->CountOfCodes; i++)
 194         {
 195           const bfd_byte *dta = ui->rawUnwindCodes + 2 * i;
 196           unsigned int off;
 197
 198           if (PEX64_UNWCODE_CODE (dta[1]) != UWOP_EPILOG)
 199             break;
 200           off = dta[0] | (PEX64_UNWCODE_INFO (dta[1]) << 8);
 201           if (off == 0)
 202             fprintf (file, " [pad]");
 203           else
 204             fprintf (file, " 0x%x", func_size - off);
 205         }
 206       fputc ('\n', file);
 207     }
 208
 209   for (; i < ui->CountOfCodes; i++)
 210     {
 211       const bfd_byte *dta = ui->rawUnwindCodes + 2 * i;
 212       unsigned int info = PEX64_UNWCODE_INFO (dta[1]);
 213       int unexpected = false;
 214
 215       fprintf (file, "\t  pc+0x%02x: ", (unsigned int) dta[0]);
 216
 217       switch (PEX64_UNWCODE_CODE (dta[1]))
 218         {
 219         case UWOP_PUSH_NONVOL:
 220           fprintf (file, "push %s", pex_regs[info]);
 221           break;
 222
 223         case UWOP_ALLOC_LARGE:
 224           if (info == 0)
 225             {
 226               if (ui->rawUnwindCodesEnd - dta < 4)
 227                 {
 228                   fprintf (file, _("warning: corrupt unwind data\n"));
 229                   return;
 230                 }
 231               tmp = bfd_get_16 (abfd, dta + 2) * 8;
 232               i++;
 233             }
 234           else
 235             {
 236               if (ui->rawUnwindCodesEnd - dta < 6)
 237                 {
 238                   fprintf (file, _("warning: corrupt unwind data\n"));
 239                   return;
 240                 }
 241               tmp = bfd_get_32 (abfd, dta + 2);
 242               i += 2;
 243             }
 244           fprintf (file, "alloc large area: rsp = rsp - 0x%x", tmp);
 245           break;
 246
 247         case UWOP_ALLOC_SMALL:
 248           fprintf (file, "alloc small area: rsp = rsp - 0x%x", (info + 1) * 8);
 249           break;
 250
 251         case UWOP_SET_FPREG:
 252           /* According to the documentation, info field is unused.  */
 253           fprintf (file, "FPReg: %s = rsp + 0x%x (info = 0x%x)",
 254                    pex_regs[ui->FrameRegister],
 255                    (unsigned int) ui->FrameOffset * 16, info);
 256           unexpected = ui->FrameRegister == 0;
 257           save_allowed = false;
 258           break;
 259
 260         case UWOP_SAVE_NONVOL:
 261           if (ui->rawUnwindCodesEnd - dta < 4)
 262             {
 263               fprintf (file, _("warning: corrupt unwind data\n"));
 264               return;
 265             }
 266           tmp = bfd_get_16 (abfd, dta + 2) * 8;
 267           i++;
 268           fprintf (file, "save %s at rsp + 0x%x", pex_regs[info], tmp);
 269           unexpected = !save_allowed;
 270           break;
 271
 272         case UWOP_SAVE_NONVOL_FAR:
 273           if (ui->rawUnwindCodesEnd - dta < 6)
 274             {
 275               fprintf (file, _("warning: corrupt unwind data\n"));
 276               return;
 277             }
 278           tmp = bfd_get_32 (abfd, dta + 2);
 279           i += 2;
 280           fprintf (file, "save %s at rsp + 0x%x", pex_regs[info], tmp);
 281           unexpected = !save_allowed;
 282           break;
 283
 284         case UWOP_SAVE_XMM:
 285           if (ui->Version == 1)
 286             {
 287               if (ui->rawUnwindCodesEnd - dta < 4)
 288                 {
 289                   fprintf (file, _("warning: corrupt unwind data\n"));
 290                   return;
 291                 }
 292               tmp = bfd_get_16 (abfd, dta + 2) * 8;
 293               i++;
 294               fprintf (file, "save mm%u at rsp + 0x%x", info, tmp);
 295               unexpected = !save_allowed;
 296             }
 297           else if (ui->Version == 2)
 298             {
 299               fprintf (file, "epilog %02x %01x", dta[0], info);
 300               unexpected = true;
 301             }
 302           break;
 303
 304         case UWOP_SAVE_XMM_FAR:
 305           if (ui->rawUnwindCodesEnd - dta < 6)
 306             {
 307               fprintf (file, _("warning: corrupt unwind data\n"));
 308               return;
 309             }
 310           tmp = bfd_get_32 (abfd, dta + 2) * 8;
 311           i += 2;
 312           fprintf (file, "save mm%u at rsp + 0x%x", info, tmp);
 313           unexpected = !save_allowed;
 314           break;
 315
 316         case UWOP_SAVE_XMM128:
 317           if (ui->rawUnwindCodesEnd - dta < 4)
 318             {
 319               fprintf (file, _("warning: corrupt unwind data\n"));
 320               return;
 321             }
 322           tmp = bfd_get_16 (abfd, dta + 2) * 16;
 323           i++;
 324           fprintf (file, "save xmm%u at rsp + 0x%x", info, tmp);
 325           unexpected = !save_allowed;
 326           break;
 327
 328         case UWOP_SAVE_XMM128_FAR:
 329           if (ui->rawUnwindCodesEnd - dta < 6)
 330             {
 331               fprintf (file, _("warning: corrupt unwind data\n"));
 332               return;
 333             }
 334           tmp = bfd_get_32 (abfd, dta + 2) * 16;
 335           i += 2;
 336           fprintf (file, "save xmm%u at rsp + 0x%x", info, tmp);
 337           unexpected = !save_allowed;
 338           break;
 339
 340         case UWOP_PUSH_MACHFRAME:
 341           fprintf (file, "interrupt entry (SS, old RSP, EFLAGS, CS, RIP");
 342           if (info == 0)
 343             fprintf (file, ")");
 344           else if (info == 1)
 345             fprintf (file, ",ErrorCode)");
 346           else
 347             fprintf (file, ", unknown(%u))", info);
 348           break;
 349
 350         default:
 351           /* PR 17512: file: 2245-7442-0.004.  */
 352           fprintf (file, _("Unknown: %x"), PEX64_UNWCODE_CODE (dta[1]));
 353           break;
 354         }
 355
 356       if (unexpected)
 357         fprintf (file, " [Unexpected!]");
 358       fputc ('\n', file);
 359     }
 360 }
 361
 362 /* Check wether section SEC_NAME contains the xdata at address ADDR.  */
 363
 364 static asection *
 365 pex64_get_section_by_rva (bfd *abfd, bfd_vma addr, const char *sec_name)
 366 {
 367   asection *section = bfd_get_section_by_name (abfd, sec_name);
 368   bfd_vma vsize;
 369   bfd_size_type datasize = 0;
 370
 371   if (section == NULL
 372       || coff_section_data (abfd, section) == NULL
 373       || pei_section_data (abfd, section) == NULL)
 374     return NULL;
 375   vsize = section->vma - pe_data (abfd)->pe_opthdr.ImageBase;
 376   datasize = section->size;
 377   if (!datasize || vsize > addr || (vsize + datasize) < addr)
 378     return NULL;
 379   return section;
 380 }
 381
 382 /* Dump xdata at for function RF to FILE.  The argument XDATA_SECTION
 383    designate the bfd section containing the xdata, XDATA is its content,
 384    and ENDX the size if known (or NULL).  */
 385
 386 static void
 387 pex64_dump_xdata (FILE *file, bfd *abfd,
 388                   asection *xdata_section, bfd_byte *xdata, bfd_vma *endx,
 389                   struct pex64_runtime_function *rf)
 390 {
 391   bfd_vma vaddr;
 392   bfd_vma end_addr;
 393   bfd_vma addr = rf->rva_UnwindData;
 394   bfd_size_type sec_size = xdata_section->rawsize > 0 ? xdata_section->rawsize : xdata_section->size;
 395   struct pex64_unwind_info ui;
 396
 397   vaddr = xdata_section->vma - pe_data (abfd)->pe_opthdr.ImageBase;
 398   addr -= vaddr;
 399
 400   /* PR 17512: file: 2245-7442-0.004.  */
 401   if (addr >= sec_size)
 402     {
 403       fprintf (file, _("warning: xdata section corrupt\n"));
 404       return;
 405     }
 406
 407   if (endx)
 408     {
 409       end_addr = endx[0] - vaddr;
 410       /* PR 17512: file: 2245-7442-0.004.  */
 411       if (end_addr > sec_size)
 412         {
 413           fprintf (file, _("warning: xdata section corrupt\n"));
 414           end_addr = sec_size;
 415         }
 416     }
 417   else
 418     end_addr = sec_size;
 419
 420   if (! pex64_get_unwind_info (abfd, &ui, xdata + addr, xdata + end_addr))
 421     {
 422       fprintf (file, _("warning: xdata section corrupt\n"));
 423       return;
 424     }
 425
 426   if (ui.Version != 1 && ui.Version != 2)
 427     {
 428       unsigned int i;
 429       fprintf (file, "\tVersion %u (unknown).\n",
 430                (unsigned int) ui.Version);
 431       for (i = 0; addr < end_addr; addr += 1, i++)
 432         {
 433           if ((i & 15) == 0)
 434             fprintf (file, "\t  %03x:", i);
 435           fprintf (file, " %02x", xdata[addr]);
 436           if ((i & 15) == 15)
 437             fprintf (file, "\n");
 438         }
 439       if ((i & 15) != 0)
 440         fprintf (file, "\n");
 441       return;
 442     }
 443
 444   fprintf (file, "\tVersion: %d, Flags: ", ui.Version);
 445   switch (ui.Flags)
 446     {
 447     case UNW_FLAG_NHANDLER:
 448       fprintf (file, "none");
 449       break;
 450     case UNW_FLAG_EHANDLER:
 451       fprintf (file, "UNW_FLAG_EHANDLER");
 452       break;
 453     case UNW_FLAG_UHANDLER:
 454       fprintf (file, "UNW_FLAG_UHANDLER");
 455       break;
 456     case UNW_FLAG_FHANDLER:
 457       fprintf
 458         (file, "UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER");
 459       break;
 460     case UNW_FLAG_CHAININFO:
 461       fprintf (file, "UNW_FLAG_CHAININFO");
 462       break;
 463     default:
 464       fprintf (file, "unknown flags value 0x%x", (unsigned int) ui.Flags);
 465       break;
 466     }
 467   fputc ('\n', file);
 468   fprintf (file, "\tNbr codes: %u, ", (unsigned int) ui.CountOfCodes);
 469   fprintf (file, "Prologue size: 0x%02x, Frame offset: 0x%x, ",
 470            (unsigned int) ui.SizeOfPrologue, (unsigned int) ui.FrameOffset);
 471   fprintf (file, "Frame reg: %s\n",
 472            ui.FrameRegister == 0 ? "none"
 473            : pex_regs[(unsigned int) ui.FrameRegister]);
 474
 475   /* PR 17512: file: 2245-7442-0.004.  */
 476   if (ui.CountOfCodes * 2 + ui.rawUnwindCodes > xdata + xdata_section->size)
 477     fprintf (file, _("Too many unwind codes (%ld)\n"), (long) ui.CountOfCodes);
 478   else
 479     pex64_xdata_print_uwd_codes (file, abfd, &ui, rf);
 480
 481   switch (ui.Flags)
 482     {
 483     case UNW_FLAG_EHANDLER:
 484     case UNW_FLAG_UHANDLER:
 485     case UNW_FLAG_FHANDLER:
 486       fprintf (file, "\tHandler: %016" PRIx64 ".\n",
 487                ui.rva_ExceptionHandler + pe_data (abfd)->pe_opthdr.ImageBase);
 488       break;
 489     case UNW_FLAG_CHAININFO:
 490       fprintf (file, "\tChain: start: %016" PRIx64 ", end: %016" PRIx64,
 491                ui.rva_BeginAddress, ui.rva_EndAddress);
 492       fprintf (file, "\n\t unwind data: %016" PRIx64 ".\n",
 493                ui.rva_UnwindData);
 494       break;
 495     }
 496
 497   /* Now we need end of this xdata block.  */
 498   addr += ui.SizeOfBlock;
 499   if (addr < end_addr)
 500     {
 501       unsigned int i;
 502       fprintf (file,"\tUser data:\n");
 503       for (i = 0; addr < end_addr; addr += 1, i++)
 504         {
 505           if ((i & 15) == 0)
 506             fprintf (file, "\t  %03x:", i);
 507           fprintf (file, " %02x", xdata[addr]);
 508           if ((i & 15) == 15)
 509             fprintf (file, "\n");
 510         }
 511       if ((i & 15) != 0)
 512         fprintf (file, "\n");
 513     }
 514 }
 515
 516 /* Helper function to sort xdata.  The entries of xdata are sorted to know
 517    the size of each entry.  */
 518
 519 static int
 520 sort_xdata_arr (const void *l, const void *r)
 521 {
 522   const bfd_vma *lp = (const bfd_vma *) l;
 523   const bfd_vma *rp = (const bfd_vma *) r;
 524
 525   if (*lp == *rp)
 526     return 0;
 527   return (*lp < *rp ? -1 : 1);
 528 }
 529
 530 /* Display unwind tables for x86-64.  */
 531
 532 static bool
 533 pex64_bfd_print_pdata_section (bfd *abfd, void *vfile, asection *pdata_section)
 534 {
 535   FILE *file = (FILE *) vfile;
 536   bfd_byte *pdata = NULL;
 537   bfd_byte *xdata = NULL;
 538   asection *xdata_section = NULL;
 539   bfd_vma xdata_base;
 540   bfd_size_type i;
 541   bfd_size_type datasize;
 542   bfd_size_type stop;
 543   bfd_vma prev_beginaddress = (bfd_vma) -1;
 544   bfd_vma prev_unwinddata_rva = (bfd_vma) -1;
 545   bfd_vma imagebase;
 546   int onaline = PDATA_ROW_SIZE;
 547   int seen_error = 0;
 548   bfd_vma *xdata_arr = NULL;
 549   int xdata_arr_cnt;
 550   bool virt_size_is_zero = false;
 551
 552   /* Sanity checks.  */
 553   if (pdata_section == NULL
 554       || (pdata_section->flags & SEC_HAS_CONTENTS) == 0
 555       || coff_section_data (abfd, pdata_section) == NULL
 556       || pei_section_data (abfd, pdata_section) == NULL)
 557     return true;
 558
 559   stop = pei_section_data (abfd, pdata_section)->virt_size;
 560   if ((stop % onaline) != 0)
 561     fprintf (file,
 562              /* xgettext:c-format */
 563              _("Warning: %s section size (%ld) is not a multiple of %d\n"),
 564              pdata_section->name, (long) stop, onaline);
 565
 566   datasize = pdata_section->size;
 567   if (datasize == 0)
 568     {
 569       if (stop)
 570         fprintf (file, _("Warning: %s section size is zero\n"),
 571                  pdata_section->name);
 572       return true;
 573     }
 574
 575   /* virt_size might be zero for objects.  */
 576   if (stop == 0 && strcmp (abfd->xvec->name, "pe-x86-64") == 0)
 577     {
 578       stop = datasize;
 579       virt_size_is_zero = true;
 580     }
 581   else if (datasize < stop)
 582       {
 583         fprintf (file,
 584                  /* xgettext:c-format */
 585                  _("Warning: %s section size (%ld) is smaller than virtual size (%ld)\n"),
 586                  pdata_section->name, (unsigned long) datasize,
 587                  (unsigned long) stop);
 588         /* Be sure not to read past datasize.  */
 589         stop = datasize;
 590       }
 591
 592   /* Display functions table.  */
 593   fprintf (file,
 594            _("\nThe Function Table (interpreted %s section contents)\n"),
 595            pdata_section->name);
 596
 597   fprintf (file, _("vma:\t\t\tBeginAddress\t EndAddress\t  UnwindData\n"));
 598
 599   if (!bfd_malloc_and_get_section (abfd, pdata_section, &pdata))
 600     goto done;
 601
 602   /* Table of xdata entries.  */
 603   xdata_arr = (bfd_vma *) xmalloc (sizeof (bfd_vma) * ((stop / onaline) + 1));
 604   xdata_arr_cnt = 0;
 605
 606   if (strcmp (abfd->xvec->name, "pei-x86-64") == 0)
 607     imagebase = pe_data (abfd)->pe_opthdr.ImageBase;
 608   else
 609     imagebase = 0;
 610
 611   for (i = 0; i < stop; i += onaline)
 612     {
 613       struct pex64_runtime_function rf;
 614
 615       if (i + PDATA_ROW_SIZE > stop)
 616         break;
 617
 618       pex64_get_runtime_function (abfd, &rf, &pdata[i]);
 619
 620       if (rf.rva_BeginAddress == 0 && rf.rva_EndAddress == 0
 621           && rf.rva_UnwindData == 0)
 622         /* We are probably into the padding of the section now.  */
 623         break;
 624       fprintf (file, " %016" PRIx64, i + pdata_section->vma);
 625       fprintf (file, ":\t%016" PRIx64, imagebase + rf.rva_BeginAddress);
 626       fprintf (file, " %016" PRIx64, imagebase + rf.rva_EndAddress);
 627       fprintf (file, " %016" PRIx64 "\n", imagebase + rf.rva_UnwindData);
 628       if (i != 0 && rf.rva_BeginAddress <= prev_beginaddress)
 629         {
 630           seen_error = 1;
 631           fprintf (file, "  has %s begin address as predecessor\n",
 632             (rf.rva_BeginAddress < prev_beginaddress ? "smaller" : "same"));
 633         }
 634       prev_beginaddress = rf.rva_BeginAddress;
 635       /* Now we check for negative addresses.  */
 636       if ((prev_beginaddress & 0x80000000) != 0)
 637         {
 638           seen_error = 1;
 639           fprintf (file, "  has negative begin address\n");
 640         }
 641       if ((rf.rva_EndAddress & 0x80000000) != 0)
 642         {
 643           seen_error = 1;
 644           fprintf (file, "  has negative end address\n");
 645         }
 646       if ((rf.rva_UnwindData & 0x80000000) != 0)
 647         {
 648           seen_error = 1;
 649           fprintf (file, "  has negative unwind address\n");
 650         }
 651       else if ((rf.rva_UnwindData && !PEX64_IS_RUNTIME_FUNCTION_CHAINED (&rf))
 652                 || virt_size_is_zero)
 653         xdata_arr[xdata_arr_cnt++] = rf.rva_UnwindData;
 654     }
 655
 656   if (seen_error)
 657     goto done;
 658
 659   /* Add end of list marker.  */
 660   xdata_arr[xdata_arr_cnt++] = ~((bfd_vma) 0);
 661
 662   /* Sort start RVAs of xdata.  */
 663   if (xdata_arr_cnt > 1)
 664     qsort (xdata_arr, (size_t) xdata_arr_cnt, sizeof (bfd_vma),
 665            sort_xdata_arr);
 666
 667   /* Find the section containing the unwind data (.xdata).  */
 668   xdata_base = xdata_arr[0];
 669   /* For sections with long names, first look for the same
 670      section name, replacing .pdata by .xdata prefix.  */
 671   if (strcmp (pdata_section->name, ".pdata") != 0)
 672     {
 673       size_t len = strlen (pdata_section->name);
 674       char *xdata_name = xmalloc (len + 1);
 675
 676       xdata_name = memcpy (xdata_name, pdata_section->name, len + 1);
 677       /* Transform .pdata prefix into .xdata prefix.  */
 678       if (len > 1)
 679         xdata_name [1] = 'x';
 680       xdata_section = pex64_get_section_by_rva (abfd, xdata_base,
 681                                                 xdata_name);
 682       free (xdata_name);
 683     }
 684   /* Second, try the .xdata section itself.  */
 685   if (!xdata_section)
 686     xdata_section = pex64_get_section_by_rva (abfd, xdata_base, ".xdata");
 687   /* Otherwise, if xdata_base is non zero, search also inside
 688      other standard sections.  */
 689   if (!xdata_section && xdata_base)
 690     xdata_section = pex64_get_section_by_rva (abfd, xdata_base, ".rdata");
 691   if (!xdata_section && xdata_base)
 692     xdata_section = pex64_get_section_by_rva (abfd, xdata_base, ".data");
 693   if (!xdata_section && xdata_base)
 694     xdata_section = pex64_get_section_by_rva (abfd, xdata_base, ".pdata");
 695   if (!xdata_section && xdata_base)
 696     xdata_section = pex64_get_section_by_rva (abfd, xdata_base, ".text");
 697   /* Transfer xdata section into xdata array.  */
 698   if (!xdata_section
 699       || (xdata_section->flags & SEC_HAS_CONTENTS) == 0
 700       || !bfd_malloc_and_get_section (abfd, xdata_section, &xdata))
 701     goto done;
 702
 703   /* Avoid "also used "... ouput for single unwind info
 704      in object file.  */
 705   prev_unwinddata_rva = (bfd_vma) -1;
 706
 707   /* Do dump of pdata related xdata.  */
 708   for (i = 0; i < stop; i += onaline)
 709     {
 710       struct pex64_runtime_function rf;
 711
 712       if (i + PDATA_ROW_SIZE > stop)
 713         break;
 714
 715       pex64_get_runtime_function (abfd, &rf, &pdata[i]);
 716
 717       if (rf.rva_BeginAddress == 0 && rf.rva_EndAddress == 0
 718           && rf.rva_UnwindData == 0)
 719         /* We are probably into the padding of the section now.  */
 720         break;
 721       if (i == 0)
 722         fprintf (file, _("\nDump of %s\n"), xdata_section->name);
 723
 724       fprintf (file, " %016" PRIx64, rf.rva_UnwindData + imagebase);
 725
 726       if (prev_unwinddata_rva == rf.rva_UnwindData)
 727         {
 728           /* Do not dump again the xdata for the same entry.  */
 729           fprintf (file, " also used for function at %016" PRIx64 "\n",
 730                    rf.rva_BeginAddress + imagebase);
 731           continue;
 732         }
 733       else
 734         prev_unwinddata_rva = rf.rva_UnwindData;
 735
 736       fprintf (file, " (rva: %08x): %016" PRIx64 " - %016" PRIx64 "\n",
 737                (unsigned int) rf.rva_UnwindData,
 738                rf.rva_BeginAddress + imagebase,
 739                rf.rva_EndAddress + imagebase);
 740
 741       if (rf.rva_UnwindData != 0 || virt_size_is_zero)
 742         {
 743           if (PEX64_IS_RUNTIME_FUNCTION_CHAINED (&rf))
 744             {
 745               bfd_vma altent = PEX64_GET_UNWINDDATA_UNIFIED_RVA (&rf);
 746               bfd_vma pdata_vma = bfd_section_vma (pdata_section);
 747               struct pex64_runtime_function arf;
 748
 749               fprintf (file, "\t shares information with ");
 750               altent += imagebase;
 751
 752               if (altent >= pdata_vma
 753                   && altent - pdata_vma + PDATA_ROW_SIZE <= stop)
 754                 {
 755                   pex64_get_runtime_function
 756                     (abfd, &arf, &pdata[altent - pdata_vma]);
 757                   fprintf (file, "pdata element at 0x%016" PRIx64,
 758                            arf.rva_UnwindData);
 759                 }
 760               else
 761                 fprintf (file, "unknown pdata element");
 762               fprintf (file, ".\n");
 763             }
 764           else
 765             {
 766               bfd_vma *p;
 767
 768               /* Search for the current entry in the sorted array.  */
 769               p = (bfd_vma *)
 770                   bsearch (&rf.rva_UnwindData, xdata_arr,
 771                            (size_t) xdata_arr_cnt, sizeof (bfd_vma),
 772                            sort_xdata_arr);
 773
 774               /* Advance to the next pointer into the xdata section.  We may
 775                  have shared xdata entries, which will result in a string of
 776                  identical pointers in the array; advance past all of them.  */
 777               while (p[0] <= rf.rva_UnwindData)
 778                 ++p;
 779
 780               if (p[0] == ~((bfd_vma) 0))
 781                 p = NULL;
 782
 783               pex64_dump_xdata (file, abfd, xdata_section, xdata, p, &rf);
 784             }
 785         }
 786     }
 787
 788  done:
 789   free (pdata);
 790   free (xdata_arr);
 791   free (xdata);
 792
 793   return true;
 794 }
 795
 796 struct pex64_paps
 797 {
 798   void *obj;
 799   /* Number of found pdata sections.  */
 800   unsigned int pdata_count;
 801 };
 802
 803 /* Functionn prototype.  */
 804 bool pex64_bfd_print_pdata (bfd *, void *);
 805
 806 /* Helper function for bfd_map_over_section.  */
 807 static void
 808 pex64_print_all_pdata_sections (bfd *abfd, asection *pdata, void *arg)
 809 {
 810   struct pex64_paps *paps = arg;
 811   if (startswith (pdata->name, ".pdata"))
 812     {
 813       if (pex64_bfd_print_pdata_section (abfd, paps->obj, pdata))
 814         paps->pdata_count++;
 815     }
 816 }
 817
 818 bool
 819 pex64_bfd_print_pdata (bfd *abfd, void *vfile)
 820 {
 821   asection *pdata_section = bfd_get_section_by_name (abfd, ".pdata");
 822   struct pex64_paps paps;
 823
 824   if (pdata_section)
 825     return pex64_bfd_print_pdata_section (abfd, vfile, pdata_section);
 826
 827   paps.obj = vfile;
 828   paps.pdata_count = 0;
 829   bfd_map_over_sections (abfd, pex64_print_all_pdata_sections, &paps);
 830   return paps.pdata_count != 0;
 831 }
 832
 833 #define bfd_pe_print_pdata   pex64_bfd_print_pdata
 834 #define bfd_coff_std_swap_table bfd_coff_pei_swap_table
 835
 836 #include "coff-x86_64.c"