ld/emultempl/pep.em

   1 # This shell script emits a C file. -*- C -*-
   2 # It does some substitutions.
   3 test -z "${ENTRY}" && ENTRY="_mainCRTStartup"
   4 if [ -z "$MACHINE" ]; then
   5   OUTPUT_ARCH=${ARCH}
   6 else
   7   OUTPUT_ARCH=${ARCH}:${MACHINE}
   8 fi
   9 rm -f e${EMULATION_NAME}.c
  10 (echo;echo;echo;echo;echo)>e${EMULATION_NAME}.c # there, now line numbers match ;-)
  11 fragment <<EOF
  12 /* Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
  13    Written by Kai Tietz, OneVision Software GmbH&CoKg.
  14
  15    This file is part of the GNU Binutils.
  16
  17    This program is free software; you can redistribute it and/or modify
  18    it under the terms of the GNU General Public License as published by
  19    the Free Software Foundation; either version 3 of the License, or
  20    (at your option) any later version.
  21
  22    This program is distributed in the hope that it will be useful,
  23    but WITHOUT ANY WARRANTY; without even the implied warranty of
  24    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25    GNU General Public License for more details.
  26
  27    You should have received a copy of the GNU General Public License
  28    along with this program; if not, write to the Free Software
  29    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  30    MA 02110-1301, USA.  */
  31
  32
  33 /* For WINDOWS_XP64 and higher */
  34 /* Based on pe.em, but modified for 64 bit support.  */
  35
  36 #define TARGET_IS_${EMULATION_NAME}
  37
  38 #define COFF_IMAGE_WITH_PE
  39 #define COFF_WITH_PE
  40 #define COFF_WITH_pex64
  41
  42 #include "sysdep.h"
  43 #include "bfd.h"
  44 #include "bfdlink.h"
  45 #include "getopt.h"
  46 #include "libiberty.h"
  47 #include "ld.h"
  48 #include "ldmain.h"
  49 #include "ldexp.h"
  50 #include "ldlang.h"
  51 #include "ldfile.h"
  52 #include "ldemul.h"
  53 #include <ldgram.h>
  54 #include "ldlex.h"
  55 #include "ldmisc.h"
  56 #include "ldctor.h"
  57 #include "coff/internal.h"
  58
  59 /* FIXME: See bfd/peXXigen.c for why we include an architecture specific
  60    header in generic PE code.  */
  61 #include "coff/x86_64.h"
  62 #include "coff/pe.h"
  63
  64 /* FIXME: This is a BFD internal header file, and we should not be
  65    using it here.  */
  66 #include "../bfd/libcoff.h"
  67
  68 #undef  AOUTSZ
  69 #define AOUTSZ          PEPAOUTSZ
  70 #define PEAOUTHDR       PEPAOUTHDR
  71
  72 #include "deffile.h"
  73 #include "pep-dll.h"
  74 #include "safe-ctype.h"
  75
  76 /* Permit the emulation parameters to override the default section
  77    alignment by setting OVERRIDE_SECTION_ALIGNMENT.  FIXME: This makes
  78    it seem that include/coff/internal.h should not define
  79    PE_DEF_SECTION_ALIGNMENT.  */
  80 #if PE_DEF_SECTION_ALIGNMENT != ${OVERRIDE_SECTION_ALIGNMENT:-PE_DEF_SECTION_ALIGNMENT}
  81 #undef  PE_DEF_SECTION_ALIGNMENT
  82 #define PE_DEF_SECTION_ALIGNMENT ${OVERRIDE_SECTION_ALIGNMENT}
  83 #endif
  84
  85 #ifdef TARGET_IS_i386pep
  86 #define DLL_SUPPORT
  87 #endif
  88
  89 #if defined(TARGET_IS_i386pep) || ! defined(DLL_SUPPORT)
  90 #define PE_DEF_SUBSYSTEM                3
  91 #else
  92 #undef  NT_EXE_IMAGE_BASE
  93 #define NT_EXE_IMAGE_BASE               0x00010000
  94 #undef  PE_DEF_SECTION_ALIGNMENT
  95 #define PE_DEF_SUBSYSTEM                2
  96 #undef  PE_DEF_FILE_ALIGNMENT
  97 #define PE_DEF_FILE_ALIGNMENT           0x00000200
  98 #define PE_DEF_SECTION_ALIGNMENT        0x00000400
  99 #endif
 100
 101
 102 static struct internal_extra_pe_aouthdr pep;
 103 static int dll;
 104 static flagword real_flags = IMAGE_FILE_LARGE_ADDRESS_AWARE;
 105 static int support_old_code = 0;
 106 static lang_assignment_statement_type *image_base_statement = 0;
 107
 108 #ifdef DLL_SUPPORT
 109 static int    pep_enable_stdcall_fixup = 1; /* 0=disable 1=enable (default).  */
 110 static char * pep_out_def_filename = NULL;
 111 static char * pep_implib_filename = NULL;
 112 static int    pep_enable_auto_image_base = 0;
 113 static char * pep_dll_search_prefix = NULL;
 114 #endif
 115
 116 extern const char *output_filename;
 117
 118 static void
 119 gld_${EMULATION_NAME}_before_parse (void)
 120 {
 121   ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
 122   output_filename = "${EXECUTABLE_NAME:-a.exe}";
 123 #ifdef DLL_SUPPORT
 124   config.dynamic_link = TRUE;
 125   config.has_shared = 1;
 126   link_info.pei386_auto_import = -1;
 127   link_info.pei386_runtime_pseudo_reloc = -1;
 128
 129 #if (PE_DEF_SUBSYSTEM == 9) || (PE_DEF_SUBSYSTEM == 2)
 130   lang_default_entry ("_WinMainCRTStartup");
 131 #else
 132   lang_default_entry ("${ENTRY}");
 133 #endif
 134 #endif
 135 }
 136 \f
 137 /* PE format extra command line options.  */
 138
 139 /* Used for setting flags in the PE header.  */
 140 enum options
 141 {
 142   OPTION_BASE_FILE = 300 + 1,
 143   OPTION_DLL,
 144   OPTION_FILE_ALIGNMENT,
 145   OPTION_IMAGE_BASE,
 146   OPTION_MAJOR_IMAGE_VERSION,
 147   OPTION_MAJOR_OS_VERSION,
 148   OPTION_MAJOR_SUBSYSTEM_VERSION,
 149   OPTION_MINOR_IMAGE_VERSION,
 150   OPTION_MINOR_OS_VERSION,
 151   OPTION_MINOR_SUBSYSTEM_VERSION,
 152   OPTION_SECTION_ALIGNMENT,
 153   OPTION_STACK,
 154   OPTION_SUBSYSTEM,
 155   OPTION_HEAP,
 156   OPTION_SUPPORT_OLD_CODE,
 157   OPTION_OUT_DEF,
 158   OPTION_EXPORT_ALL,
 159   OPTION_EXCLUDE_SYMBOLS,
 160   OPTION_KILL_ATS,
 161   OPTION_STDCALL_ALIASES,
 162   OPTION_ENABLE_STDCALL_FIXUP,
 163   OPTION_DISABLE_STDCALL_FIXUP,
 164   OPTION_IMPLIB_FILENAME,
 165   OPTION_WARN_DUPLICATE_EXPORTS,
 166   OPTION_IMP_COMPAT,
 167   OPTION_ENABLE_AUTO_IMAGE_BASE,
 168   OPTION_DISABLE_AUTO_IMAGE_BASE,
 169   OPTION_DLL_SEARCH_PREFIX,
 170   OPTION_NO_DEFAULT_EXCLUDES,
 171   OPTION_DLL_ENABLE_AUTO_IMPORT,
 172   OPTION_DLL_DISABLE_AUTO_IMPORT,
 173   OPTION_ENABLE_EXTRA_PE_DEBUG,
 174   OPTION_EXCLUDE_LIBS,
 175   OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC,
 176   OPTION_DLL_DISABLE_RUNTIME_PSEUDO_RELOC
 177 };
 178
 179 static void
 180 gld${EMULATION_NAME}_add_options
 181   (int ns ATTRIBUTE_UNUSED,
 182    char **shortopts ATTRIBUTE_UNUSED,
 183    int nl,
 184    struct option **longopts,
 185    int nrl ATTRIBUTE_UNUSED,
 186    struct option **really_longopts ATTRIBUTE_UNUSED)
 187 {
 188   static const struct option xtra_long[] =
 189   {
 190     /* PE options */
 191     {"base-file", required_argument, NULL, OPTION_BASE_FILE},
 192     {"dll", no_argument, NULL, OPTION_DLL},
 193     {"file-alignment", required_argument, NULL, OPTION_FILE_ALIGNMENT},
 194     {"heap", required_argument, NULL, OPTION_HEAP},
 195     {"image-base", required_argument, NULL, OPTION_IMAGE_BASE},
 196     {"major-image-version", required_argument, NULL, OPTION_MAJOR_IMAGE_VERSION},
 197     {"major-os-version", required_argument, NULL, OPTION_MAJOR_OS_VERSION},
 198     {"major-subsystem-version", required_argument, NULL, OPTION_MAJOR_SUBSYSTEM_VERSION},
 199     {"minor-image-version", required_argument, NULL, OPTION_MINOR_IMAGE_VERSION},
 200     {"minor-os-version", required_argument, NULL, OPTION_MINOR_OS_VERSION},
 201     {"minor-subsystem-version", required_argument, NULL, OPTION_MINOR_SUBSYSTEM_VERSION},
 202     {"section-alignment", required_argument, NULL, OPTION_SECTION_ALIGNMENT},
 203     {"stack", required_argument, NULL, OPTION_STACK},
 204     {"subsystem", required_argument, NULL, OPTION_SUBSYSTEM},
 205     {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE},
 206 #ifdef DLL_SUPPORT
 207     /* getopt allows abbreviations, so we do this to stop it
 208        from treating -o as an abbreviation for this option.  */
 209     {"output-def", required_argument, NULL, OPTION_OUT_DEF},
 210     {"output-def", required_argument, NULL, OPTION_OUT_DEF},
 211     {"export-all-symbols", no_argument, NULL, OPTION_EXPORT_ALL},
 212     {"exclude-symbols", required_argument, NULL, OPTION_EXCLUDE_SYMBOLS},
 213     {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
 214     {"kill-at", no_argument, NULL, OPTION_KILL_ATS},
 215     {"add-stdcall-alias", no_argument, NULL, OPTION_STDCALL_ALIASES},
 216     {"enable-stdcall-fixup", no_argument, NULL, OPTION_ENABLE_STDCALL_FIXUP},
 217     {"disable-stdcall-fixup", no_argument, NULL, OPTION_DISABLE_STDCALL_FIXUP},
 218     {"out-implib", required_argument, NULL, OPTION_IMPLIB_FILENAME},
 219     {"warn-duplicate-exports", no_argument, NULL, OPTION_WARN_DUPLICATE_EXPORTS},
 220     /* getopt() allows abbreviations, so we do this to stop it from
 221        treating -c as an abbreviation for these --compat-implib.  */
 222     {"compat-implib", no_argument, NULL, OPTION_IMP_COMPAT},
 223     {"compat-implib", no_argument, NULL, OPTION_IMP_COMPAT},
 224     {"enable-auto-image-base", no_argument, NULL, OPTION_ENABLE_AUTO_IMAGE_BASE},
 225     {"disable-auto-image-base", no_argument, NULL, OPTION_DISABLE_AUTO_IMAGE_BASE},
 226     {"dll-search-prefix", required_argument, NULL, OPTION_DLL_SEARCH_PREFIX},
 227     {"no-default-excludes", no_argument, NULL, OPTION_NO_DEFAULT_EXCLUDES},
 228     {"enable-auto-import", no_argument, NULL, OPTION_DLL_ENABLE_AUTO_IMPORT},
 229     {"disable-auto-import", no_argument, NULL, OPTION_DLL_DISABLE_AUTO_IMPORT},
 230     {"enable-extra-pep-debug", no_argument, NULL, OPTION_ENABLE_EXTRA_PE_DEBUG},
 231     {"enable-runtime-pseudo-reloc", no_argument, NULL, OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC},
 232     {"disable-runtime-pseudo-reloc", no_argument, NULL, OPTION_DLL_DISABLE_RUNTIME_PSEUDO_RELOC},
 233 #endif
 234     {NULL, no_argument, NULL, 0}
 235   };
 236
 237   *longopts = xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
 238   memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
 239 }
 240
 241 /* PE/WIN32; added routines to get the subsystem type, heap and/or stack
 242    parameters which may be input from the command line.  */
 243
 244 typedef struct
 245 {
 246   void *ptr;
 247   int size;
 248   bfd_vma value;
 249   char *symbol;
 250   int inited;
 251 } definfo;
 252
 253 #define D(field,symbol,def)  {&pep.field,sizeof(pep.field), def, symbol,0}
 254
 255 static definfo init[] =
 256 {
 257   /* imagebase must be first */
 258 #define IMAGEBASEOFF 0
 259   D(ImageBase,"__image_base__", NT_EXE_IMAGE_BASE),
 260 #define DLLOFF 1
 261   {&dll, sizeof(dll), 0, "__dll__", 0},
 262 #define MSIMAGEBASEOFF  2
 263   D(ImageBase,"___ImageBase", NT_EXE_IMAGE_BASE),
 264   D(SectionAlignment,"__section_alignment__", PE_DEF_SECTION_ALIGNMENT),
 265   D(FileAlignment,"__file_alignment__", PE_DEF_FILE_ALIGNMENT),
 266   D(MajorOperatingSystemVersion,"__major_os_version__", 4),
 267   D(MinorOperatingSystemVersion,"__minor_os_version__", 0),
 268   D(MajorImageVersion,"__major_image_version__", 0),
 269   D(MinorImageVersion,"__minor_image_version__", 0),
 270   D(MajorSubsystemVersion,"__major_subsystem_version__", 5),
 271   D(MinorSubsystemVersion,"__minor_subsystem_version__", 2),
 272   D(Subsystem,"__subsystem__", ${SUBSYSTEM}),
 273   D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x200000),
 274   D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000),
 275   D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000),
 276   D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000),
 277   D(LoaderFlags,"__loader_flags__", 0x0),
 278   { NULL, 0, 0, NULL, 0 }
 279 };
 280
 281
 282 static void
 283 gld_${EMULATION_NAME}_list_options (FILE *file)
 284 {
 285   fprintf (file, _("  --base_file <basefile>             Generate a base file for relocatable DLLs\n"));
 286   fprintf (file, _("  --dll                              Set image base to the default for DLLs\n"));
 287   fprintf (file, _("  --file-alignment <size>            Set file alignment\n"));
 288   fprintf (file, _("  --heap <size>                      Set initial size of the heap\n"));
 289   fprintf (file, _("  --image-base <address>             Set start address of the executable\n"));
 290   fprintf (file, _("  --major-image-version <number>     Set version number of the executable\n"));
 291   fprintf (file, _("  --major-os-version <number>        Set minimum required OS version\n"));
 292   fprintf (file, _("  --major-subsystem-version <number> Set minimum required OS subsystem version\n"));
 293   fprintf (file, _("  --minor-image-version <number>     Set revision number of the executable\n"));
 294   fprintf (file, _("  --minor-os-version <number>        Set minimum required OS revision\n"));
 295   fprintf (file, _("  --minor-subsystem-version <number> Set minimum required OS subsystem revision\n"));
 296   fprintf (file, _("  --section-alignment <size>         Set section alignment\n"));
 297   fprintf (file, _("  --stack <size>                     Set size of the initial stack\n"));
 298   fprintf (file, _("  --subsystem <name>[:<version>]     Set required OS subsystem [& version]\n"));
 299   fprintf (file, _("  --support-old-code                 Support interworking with old code\n"));
 300 #ifdef DLL_SUPPORT
 301   fprintf (file, _("  --add-stdcall-alias                Export symbols with and without @nn\n"));
 302   fprintf (file, _("  --disable-stdcall-fixup            Don't link _sym to _sym@nn\n"));
 303   fprintf (file, _("  --enable-stdcall-fixup             Link _sym to _sym@nn without warnings\n"));
 304   fprintf (file, _("  --exclude-symbols sym,sym,...      Exclude symbols from automatic export\n"));
 305   fprintf (file, _("  --exclude-libs lib,lib,...         Exclude libraries from automatic export\n"));
 306   fprintf (file, _("  --export-all-symbols               Automatically export all globals to DLL\n"));
 307   fprintf (file, _("  --kill-at                          Remove @nn from exported symbols\n"));
 308   fprintf (file, _("  --out-implib <file>                Generate import library\n"));
 309   fprintf (file, _("  --output-def <file>                Generate a .DEF file for the built DLL\n"));
 310   fprintf (file, _("  --warn-duplicate-exports           Warn about duplicate exports.\n"));
 311   fprintf (file, _("  --compat-implib                    Create backward compatible import libs;\n\
 312                                        create __imp_<SYMBOL> as well.\n"));
 313   fprintf (file, _("  --enable-auto-image-base           Automatically choose image base for DLLs\n\
 314                                        unless user specifies one\n"));
 315   fprintf (file, _("  --disable-auto-image-base          Do not auto-choose image base. (default)\n"));
 316   fprintf (file, _("  --dll-search-prefix=<string>       When linking dynamically to a dll without\n\
 317                                        an importlib, use <string><basename>.dll\n\
 318                                        in preference to lib<basename>.dll \n"));
 319   fprintf (file, _("  --enable-auto-import               Do sophistcated linking of _sym to\n\
 320                                        __imp_sym for DATA references\n"));
 321   fprintf (file, _("  --disable-auto-import              Do not auto-import DATA items from DLLs\n"));
 322   fprintf (file, _("  --enable-runtime-pseudo-reloc      Work around auto-import limitations by\n\
 323                                        adding pseudo-relocations resolved at\n\
 324                                        runtime.\n"));
 325   fprintf (file, _("  --disable-runtime-pseudo-reloc     Do not add runtime pseudo-relocations for\n\
 326                                        auto-imported DATA.\n"));
 327   fprintf (file, _("  --enable-extra-pep-debug            Enable verbose debug output when building\n\
 328                                        or linking to DLLs (esp. auto-import)\n"));
 329 #endif
 330 }
 331
 332
 333 static void
 334 set_pep_name (char *name, bfd_vma val)
 335 {
 336   int i;
 337
 338   /* Find the name and set it.  */
 339   for (i = 0; init[i].ptr; i++)
 340     {
 341       if (strcmp (name, init[i].symbol) == 0)
 342         {
 343           init[i].value = val;
 344           init[i].inited = 1;
 345           if (strcmp (name,"__image_base__") == 0)
 346             set_pep_name ("___ImageBase", val);
 347           return;
 348         }
 349     }
 350   abort ();
 351 }
 352
 353
 354 static void
 355 set_pep_subsystem (void)
 356 {
 357   const char *sver;
 358   const char *entry;
 359   const char *initial_symbol_char;
 360   char *end;
 361   int len;
 362   int i;
 363   int subsystem;
 364   unsigned long temp_subsystem;
 365   static const struct
 366     {
 367       const char *name;
 368       const int value;
 369       const char *entry;
 370     }
 371   v[] =
 372     {
 373       { "native",  1, "NtProcessStartup" },
 374       { "windows", 2, "WinMainCRTStartup" },
 375       { "console", 3, "mainCRTStartup" },
 376       { "posix",   7, "__PosixProcessStartup"},
 377       { "wince",   9, "_WinMainCRTStartup" },
 378       { "xbox",   14, "mainCRTStartup" },
 379       { NULL, 0, NULL }
 380     };
 381   /* Entry point name for arbitrary subsystem numbers.  */
 382   static const char default_entry[] = "mainCRTStartup";
 383
 384   /* Check for the presence of a version number.  */
 385   sver = strchr (optarg, ':');
 386   if (sver == NULL)
 387     len = strlen (optarg);
 388   else
 389     {
 390       len = sver - optarg;
 391       set_pep_name ("__major_subsystem_version__",
 392                     strtoul (sver + 1, &end, 0));
 393       if (*end == '.')
 394         set_pep_name ("__minor_subsystem_version__",
 395                       strtoul (end + 1, &end, 0));
 396       if (*end != '\0')
 397         einfo (_("%P: warning: bad version number in -subsystem option\n"));
 398     }
 399
 400   /* Check for numeric subsystem.  */
 401   temp_subsystem = strtoul (optarg, & end, 0);
 402   if ((*end == ':' || *end == '\0') && (temp_subsystem < 65536))
 403     {
 404       /* Search list for a numeric match to use its entry point.  */
 405       for (i = 0; v[i].name; i++)
 406         if (v[i].value == (int) temp_subsystem)
 407           break;
 408
 409       /* If no match, use the default.  */
 410       if (v[i].name != NULL)
 411         entry = v[i].entry;
 412       else
 413         entry = default_entry;
 414
 415       /* Use this subsystem.  */
 416       subsystem = (int) temp_subsystem;
 417     }
 418   else
 419     {
 420       /* Search for subsystem by name.  */
 421       for (i = 0; v[i].name; i++)
 422         if (strncmp (optarg, v[i].name, len) == 0
 423             && v[i].name[len] == '\0')
 424           break;
 425
 426       if (v[i].name == NULL)
 427         {
 428           einfo (_("%P%F: invalid subsystem type %s\n"), optarg);
 429           return;
 430         }
 431
 432       entry = v[i].entry;
 433       subsystem = v[i].value;
 434     }
 435
 436   set_pep_name ("__subsystem__", subsystem);
 437
 438   initial_symbol_char = ${INITIAL_SYMBOL_CHAR};
 439   if (*initial_symbol_char != '\0')
 440     {
 441       char *alc_entry;
 442
 443       /* lang_default_entry expects its argument to be permanently
 444          allocated, so we don't free this string.  */
 445       alc_entry = xmalloc (strlen (initial_symbol_char)
 446                            + strlen (entry)
 447                            + 1);
 448       strcpy (alc_entry, initial_symbol_char);
 449       strcat (alc_entry, entry);
 450       entry = alc_entry;
 451     }
 452
 453   lang_default_entry (entry);
 454
 455   return;
 456 }
 457
 458
 459 static void
 460 set_pep_value (char *name)
 461 {
 462   char *end;
 463
 464   set_pep_name (name,  (bfd_vma) strtoull (optarg, &end, 0));
 465
 466   if (end == optarg)
 467     einfo (_("%P%F: invalid hex number for PE parameter '%s'\n"), optarg);
 468
 469   optarg = end;
 470 }
 471
 472
 473 static void
 474 set_pep_stack_heap (char *resname, char *comname)
 475 {
 476   set_pep_value (resname);
 477
 478   if (*optarg == ',')
 479     {
 480       optarg++;
 481       set_pep_value (comname);
 482     }
 483   else if (*optarg)
 484     einfo (_("%P%F: strange hex info for PE parameter '%s'\n"), optarg);
 485 }
 486
 487
 488 static bfd_boolean
 489 gld${EMULATION_NAME}_handle_option (int optc)
 490 {
 491   switch (optc)
 492     {
 493     default:
 494       return FALSE;
 495
 496     case OPTION_BASE_FILE:
 497       link_info.base_file = fopen (optarg, FOPEN_WB);
 498       if (link_info.base_file == NULL)
 499         {
 500           /* xgettext:c-format */
 501           fprintf (stderr, _("%s: Can't open base file %s\n"),
 502                    program_name, optarg);
 503           xexit (1);
 504         }
 505       break;
 506
 507       /* PE options.  */
 508     case OPTION_HEAP:
 509       set_pep_stack_heap ("__size_of_heap_reserve__", "__size_of_heap_commit__");
 510       break;
 511     case OPTION_STACK:
 512       set_pep_stack_heap ("__size_of_stack_reserve__", "__size_of_stack_commit__");
 513       break;
 514     case OPTION_SUBSYSTEM:
 515       set_pep_subsystem ();
 516       break;
 517     case OPTION_MAJOR_OS_VERSION:
 518       set_pep_value ("__major_os_version__");
 519       break;
 520     case OPTION_MINOR_OS_VERSION:
 521       set_pep_value ("__minor_os_version__");
 522       break;
 523     case OPTION_MAJOR_SUBSYSTEM_VERSION:
 524       set_pep_value ("__major_subsystem_version__");
 525       break;
 526     case OPTION_MINOR_SUBSYSTEM_VERSION:
 527       set_pep_value ("__minor_subsystem_version__");
 528       break;
 529     case OPTION_MAJOR_IMAGE_VERSION:
 530       set_pep_value ("__major_image_version__");
 531       break;
 532     case OPTION_MINOR_IMAGE_VERSION:
 533       set_pep_value ("__minor_image_version__");
 534       break;
 535     case OPTION_FILE_ALIGNMENT:
 536       set_pep_value ("__file_alignment__");
 537       break;
 538     case OPTION_SECTION_ALIGNMENT:
 539       set_pep_value ("__section_alignment__");
 540       break;
 541     case OPTION_DLL:
 542       set_pep_name ("__dll__", 1);
 543       break;
 544     case OPTION_IMAGE_BASE:
 545       set_pep_value ("__image_base__");
 546       break;
 547     case OPTION_SUPPORT_OLD_CODE:
 548       support_old_code = 1;
 549       break;
 550 #ifdef DLL_SUPPORT
 551     case OPTION_OUT_DEF:
 552       pep_out_def_filename = xstrdup (optarg);
 553       break;
 554     case OPTION_EXPORT_ALL:
 555       pep_dll_export_everything = 1;
 556       break;
 557     case OPTION_EXCLUDE_SYMBOLS:
 558       pep_dll_add_excludes (optarg, 0);
 559       break;
 560     case OPTION_EXCLUDE_LIBS:
 561       pep_dll_add_excludes (optarg, 1);
 562       break;
 563     case OPTION_KILL_ATS:
 564       pep_dll_kill_ats = 1;
 565       break;
 566     case OPTION_STDCALL_ALIASES:
 567       pep_dll_stdcall_aliases = 1;
 568       break;
 569     case OPTION_ENABLE_STDCALL_FIXUP:
 570       pep_enable_stdcall_fixup = 1;
 571       break;
 572     case OPTION_DISABLE_STDCALL_FIXUP:
 573       pep_enable_stdcall_fixup = 0;
 574       break;
 575     case OPTION_IMPLIB_FILENAME:
 576       pep_implib_filename = xstrdup (optarg);
 577       break;
 578     case OPTION_WARN_DUPLICATE_EXPORTS:
 579       pep_dll_warn_dup_exports = 1;
 580       break;
 581     case OPTION_IMP_COMPAT:
 582       pep_dll_compat_implib = 1;
 583       break;
 584     case OPTION_ENABLE_AUTO_IMAGE_BASE:
 585       pep_enable_auto_image_base = 1;
 586       break;
 587     case OPTION_DISABLE_AUTO_IMAGE_BASE:
 588       pep_enable_auto_image_base = 0;
 589       break;
 590     case OPTION_DLL_SEARCH_PREFIX:
 591       pep_dll_search_prefix = xstrdup (optarg);
 592       break;
 593     case OPTION_NO_DEFAULT_EXCLUDES:
 594       pep_dll_do_default_excludes = 0;
 595       break;
 596     case OPTION_DLL_ENABLE_AUTO_IMPORT:
 597       link_info.pei386_auto_import = 1;
 598       break;
 599     case OPTION_DLL_DISABLE_AUTO_IMPORT:
 600       link_info.pei386_auto_import = 0;
 601       break;
 602     case OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC:
 603       link_info.pei386_runtime_pseudo_reloc = 1;
 604       break;
 605     case OPTION_DLL_DISABLE_RUNTIME_PSEUDO_RELOC:
 606       link_info.pei386_runtime_pseudo_reloc = 0;
 607       break;
 608     case OPTION_ENABLE_EXTRA_PE_DEBUG:
 609       pep_dll_extra_pe_debug = 1;
 610       break;
 611 #endif
 612     }
 613   return TRUE;
 614 }
 615 \f
 616
 617 #ifdef DLL_SUPPORT
 618 static unsigned long
 619 strhash (const char *str)
 620 {
 621   const unsigned char *s;
 622   unsigned long hash;
 623   unsigned int c;
 624   unsigned int len;
 625
 626   hash = 0;
 627   len = 0;
 628   s = (const unsigned char *) str;
 629   while ((c = *s++) != '\0')
 630     {
 631       hash += c + (c << 17);
 632       hash ^= hash >> 2;
 633       ++len;
 634     }
 635   hash += len + (len << 17);
 636   hash ^= hash >> 2;
 637
 638   return hash;
 639 }
 640
 641 /* Use the output file to create a image base for relocatable DLLs.  */
 642
 643 static bfd_vma
 644 compute_dll_image_base (const char *ofile)
 645 {
 646   bfd_vma hash = (bfd_vma) strhash (ofile);
 647   return 0x61300000 + ((hash << 16) & 0x0FFC0000);
 648 }
 649 #endif
 650
 651 /* Assign values to the special symbols before the linker script is
 652    read.  */
 653
 654 static void
 655 gld_${EMULATION_NAME}_set_symbols (void)
 656 {
 657   /* Run through and invent symbols for all the
 658      names and insert the defaults.  */
 659   int j;
 660   lang_statement_list_type *save;
 661
 662   if (!init[IMAGEBASEOFF].inited)
 663     {
 664       if (link_info.relocatable)
 665         init[IMAGEBASEOFF].value = 0;
 666       else if (init[DLLOFF].value || (link_info.shared && !link_info.pie))
 667 #ifdef DLL_SUPPORT
 668         init[IMAGEBASEOFF].value = (pep_enable_auto_image_base) ?
 669           compute_dll_image_base (output_filename) : NT_DLL_IMAGE_BASE;
 670 #else
 671         init[IMAGEBASEOFF].value = NT_DLL_IMAGE_BASE;
 672 #endif
 673       else
 674         init[IMAGEBASEOFF].value = NT_EXE_IMAGE_BASE;
 675         init[MSIMAGEBASEOFF].value = init[IMAGEBASEOFF].value;
 676     }
 677
 678   /* Don't do any symbol assignments if this is a relocatable link.  */
 679   if (link_info.relocatable)
 680     return;
 681
 682   /* Glue the assignments into the abs section.  */
 683   save = stat_ptr;
 684
 685   stat_ptr = &(abs_output_section->children);
 686
 687   for (j = 0; init[j].ptr; j++)
 688     {
 689       bfd_vma val = init[j].value;
 690       lang_assignment_statement_type *rv;
 691       rv = lang_add_assignment (exp_assop ('=', init[j].symbol,
 692                                            exp_intop (val)));
 693       if (init[j].size == sizeof (short))
 694         *(short *) init[j].ptr = (short) val;
 695       else if (init[j].size == sizeof (int))
 696         *(int *) init[j].ptr = (int) val;
 697       else if (init[j].size == sizeof (long))
 698         *(long *) init[j].ptr = (long) val;
 699       /* This might be a long long or other special type.  */
 700       else if (init[j].size == sizeof (bfd_vma))
 701         *(bfd_vma *) init[j].ptr = val;
 702       else      abort ();
 703       if (j == IMAGEBASEOFF)
 704         image_base_statement = rv;
 705     }
 706   /* Restore the pointer.  */
 707   stat_ptr = save;
 708
 709   if (pep.FileAlignment > pep.SectionAlignment)
 710     {
 711       einfo (_("%P: warning, file alignment > section alignment.\n"));
 712     }
 713 }
 714
 715 /* This is called after the linker script and the command line options
 716    have been read.  */
 717
 718 static void
 719 gld_${EMULATION_NAME}_after_parse (void)
 720 {
 721   /* The Windows libraries are designed for the linker to treat the
 722      entry point as an undefined symbol.  Otherwise, the .obj that
 723      defines mainCRTStartup is brought in because it is the first
 724      encountered in libc.lib and it has other symbols in it which will
 725      be pulled in by the link process.  To avoid this, we act as
 726      though the user specified -u with the entry point symbol.
 727
 728      This function is called after the linker script and command line
 729      options have been read, so at this point we know the right entry
 730      point.  This function is called before the input files are
 731      opened, so registering the symbol as undefined will make a
 732      difference.  */
 733
 734   if (! link_info.relocatable && entry_symbol.name != NULL)
 735     ldlang_add_undef (entry_symbol.name);
 736 }
 737
 738 /* pep-dll.c directly accesses pep_data_import_dll,
 739    so it must be defined outside of #ifdef DLL_SUPPORT.
 740    Note - this variable is deliberately not initialised.
 741    This allows it to be treated as a common varaible, and only
 742    exist in one incarnation in a multiple target enabled linker.  */
 743 char * pep_data_import_dll;
 744
 745 #ifdef DLL_SUPPORT
 746 static struct bfd_link_hash_entry *pep_undef_found_sym;
 747
 748 static bfd_boolean
 749 pep_undef_cdecl_match (struct bfd_link_hash_entry *h, void *inf)
 750 {
 751   int sl;
 752   char *string = inf;
 753
 754   sl = strlen (string);
 755   if (h->type == bfd_link_hash_defined
 756       && strncmp (h->root.string, string, sl) == 0
 757       && h->root.string[sl] == '@')
 758     {
 759       pep_undef_found_sym = h;
 760       return FALSE;
 761     }
 762   return TRUE;
 763 }
 764
 765 static void
 766 pep_fixup_stdcalls (void)
 767 {
 768   static int gave_warning_message = 0;
 769   struct bfd_link_hash_entry *undef, *sym;
 770
 771   if (pep_dll_extra_pe_debug)
 772     printf ("%s\n", __FUNCTION__);
 773
 774   for (undef = link_info.hash->undefs; undef; undef=undef->u.undef.next)
 775     if (undef->type == bfd_link_hash_undefined)
 776       {
 777         char* at = strchr (undef->root.string, '@');
 778         int lead_at = (*undef->root.string == '@');
 779         /* For now, don't try to fixup fastcall symbols.  */
 780
 781         if (at && !lead_at)
 782           {
 783             /* The symbol is a stdcall symbol, so let's look for a
 784                cdecl symbol with the same name and resolve to that.  */
 785             char *cname = xstrdup (undef->root.string /* + lead_at */);
 786             at = strchr (cname, '@');
 787             *at = 0;
 788             sym = bfd_link_hash_lookup (link_info.hash, cname, 0, 0, 1);
 789
 790             if (sym && sym->type == bfd_link_hash_defined)
 791               {
 792                 undef->type = bfd_link_hash_defined;
 793                 undef->u.def.value = sym->u.def.value;
 794                 undef->u.def.section = sym->u.def.section;
 795
 796                 if (pep_enable_stdcall_fixup == -1)
 797                   {
 798                     einfo (_("Warning: resolving %s by linking to %s\n"),
 799                            undef->root.string, cname);
 800                     if (! gave_warning_message)
 801                       {
 802                         gave_warning_message = 1;
 803                         einfo (_("Use --enable-stdcall-fixup to disable these warnings\n"));
 804                         einfo (_("Use --disable-stdcall-fixup to disable these fixups\n"));
 805                       }
 806                   }
 807               }
 808           }
 809         else
 810           {
 811             /* The symbol is a cdecl symbol, so we look for stdcall
 812                symbols - which means scanning the whole symbol table.  */
 813             pep_undef_found_sym = 0;
 814             bfd_link_hash_traverse (link_info.hash, pep_undef_cdecl_match,
 815                                     (char *) undef->root.string);
 816             sym = pep_undef_found_sym;
 817             if (sym)
 818               {
 819                 undef->type = bfd_link_hash_defined;
 820                 undef->u.def.value = sym->u.def.value;
 821                 undef->u.def.section = sym->u.def.section;
 822
 823                 if (pep_enable_stdcall_fixup == -1)
 824                   {
 825                     einfo (_("Warning: resolving %s by linking to %s\n"),
 826                            undef->root.string, sym->root.string);
 827                     if (! gave_warning_message)
 828                       {
 829                         gave_warning_message = 1;
 830                         einfo (_("Use --enable-stdcall-fixup to disable these warnings\n"));
 831                         einfo (_("Use --disable-stdcall-fixup to disable these fixups\n"));
 832                       }
 833                   }
 834               }
 835           }
 836       }
 837 }
 838
 839 static int
 840 make_import_fixup (arelent *rel, asection *s)
 841 {
 842   struct bfd_symbol *sym = *rel->sym_ptr_ptr;
 843   char addend[4];
 844
 845   if (pep_dll_extra_pe_debug)
 846     printf ("arelent: %s@%#lx: add=%li\n", sym->name,
 847             (unsigned long) rel->address, (long) rel->addend);
 848
 849   if (! bfd_get_section_contents (s->owner, s, addend, rel->address, sizeof (addend)))
 850     einfo (_("%C: Cannot get section contents - auto-import exception\n"),
 851            s->owner, s, rel->address);
 852
 853   pep_create_import_fixup (rel, s, bfd_get_32 (s->owner, addend));
 854
 855   return 1;
 856 }
 857
 858 static void
 859 pep_find_data_imports (void)
 860 {
 861   struct bfd_link_hash_entry *undef, *sym;
 862
 863   if (link_info.pei386_auto_import == 0)
 864     return;
 865
 866   for (undef = link_info.hash->undefs; undef; undef=undef->u.undef.next)
 867     {
 868       if (undef->type == bfd_link_hash_undefined)
 869         {
 870           /* C++ symbols are *long*.  */
 871           char buf[4096];
 872
 873           if (pep_dll_extra_pe_debug)
 874             printf ("%s:%s\n", __FUNCTION__, undef->root.string);
 875
 876           sprintf (buf, "__imp_%s", undef->root.string);
 877
 878           sym = bfd_link_hash_lookup (link_info.hash, buf, 0, 0, 1);
 879
 880           if (sym && sym->type == bfd_link_hash_defined)
 881             {
 882               bfd *b = sym->u.def.section->owner;
 883               asymbol **symbols;
 884               int nsyms, i;
 885
 886               if (link_info.pei386_auto_import == -1)
 887                 {
 888                   static bfd_boolean warned = FALSE;
 889
 890                   info_msg (_("Info: resolving %s by linking to %s (auto-import)\n"),
 891                             undef->root.string, buf);
 892
 893                   /* PR linker/4844.  */
 894                   if (! warned)
 895                     {
 896                       warned = TRUE;
 897                       einfo (_("%P: warning: auto-importing has been activated without --enable-auto-import specified on the command line.\n\
 898 This should work unless it involves constant data structures referencing symbols from auto-imported DLLs.\n"));
 899                     }
 900                 }
 901
 902               if (!bfd_generic_link_read_symbols (b))
 903                 {
 904                   einfo (_("%B%F: could not read symbols: %E\n"), b);
 905                   return;
 906                 }
 907
 908               symbols = bfd_get_outsymbols (b);
 909               nsyms = bfd_get_symcount (b);
 910
 911               for (i = 0; i < nsyms; i++)
 912                 {
 913                   if (! CONST_STRNEQ (symbols[i]->name, "__head_"))
 914                     continue;
 915
 916                   if (pep_dll_extra_pe_debug)
 917                     printf ("->%s\n", symbols[i]->name);
 918
 919                   pep_data_import_dll = (char*) (symbols[i]->name +
 920                                                 sizeof ("__head_") - 1);
 921                   break;
 922                 }
 923
 924               pep_walk_relocs_of_symbol (&link_info, undef->root.string,
 925                                         make_import_fixup);
 926
 927               /* Let's differentiate it somehow from defined.  */
 928               undef->type = bfd_link_hash_defweak;
 929               /* We replace original name with __imp_ prefixed, this
 930                  1) may trash memory 2) leads to duplicate symbol generation.
 931                  Still, IMHO it's better than having name poluted.  */
 932               undef->root.string = sym->root.string;
 933               undef->u.def.value = sym->u.def.value;
 934               undef->u.def.section = sym->u.def.section;
 935             }
 936         }
 937     }
 938 }
 939
 940 static bfd_boolean
 941 pr_sym (struct bfd_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
 942 {
 943   if (pep_dll_extra_pe_debug)
 944     printf ("+%s\n", h->string);
 945
 946   return TRUE;
 947 }
 948 #endif /* DLL_SUPPORT */
 949
 950
 951 static void
 952 gld_${EMULATION_NAME}_after_open (void)
 953 {
 954 #ifdef DLL_SUPPORT
 955   if (pep_dll_extra_pe_debug)
 956     {
 957       bfd *a;
 958       struct bfd_link_hash_entry *sym;
 959
 960       printf ("%s()\n", __FUNCTION__);
 961
 962       for (sym = link_info.hash->undefs; sym; sym=sym->u.undef.next)
 963         printf ("-%s\n", sym->root.string);
 964       bfd_hash_traverse (&link_info.hash->table, pr_sym, NULL);
 965
 966       for (a = link_info.input_bfds; a; a = a->link_next)
 967         printf ("*%s\n",a->filename);
 968     }
 969 #endif
 970
 971   /* Pass the wacky PE command line options into the output bfd.
 972      FIXME: This should be done via a function, rather than by
 973      including an internal BFD header.  */
 974
 975   if (coff_data (link_info.output_bfd) == NULL
 976       || coff_data (link_info.output_bfd)->pe == 0)
 977     einfo (_("%F%P: cannot perform PE operations on non PE output file '%B'.\n"),
 978            link_info.output_bfd);
 979
 980   pe_data (link_info.output_bfd)->pe_opthdr = pep;
 981   pe_data (link_info.output_bfd)->dll = init[DLLOFF].value;
 982   pe_data (link_info.output_bfd)->real_flags |= real_flags;
 983
 984 #ifdef DLL_SUPPORT
 985   if (pep_enable_stdcall_fixup) /* -1=warn or 1=disable */
 986     pep_fixup_stdcalls ();
 987
 988   pep_process_import_defs (link_info.output_bfd, &link_info);
 989
 990   pep_find_data_imports ();
 991
 992 #ifndef TARGET_IS_i386pep
 993   if (link_info.shared)
 994 #else
 995   if (!link_info.relocatable)
 996 #endif
 997     pep_dll_build_sections (link_info.output_bfd, &link_info);
 998
 999 #ifndef TARGET_IS_i386pep
1000   else
1001     pep_exe_build_sections (link_info.output_bfd, &link_info);
1002 #endif
1003 #endif /* DLL_SUPPORT */
1004
1005   {
1006     /* This next chunk of code tries to detect the case where you have
1007        two import libraries for the same DLL (specifically,
1008        symbolically linking libm.a and libc.a in cygwin to
1009        libcygwin.a).  In those cases, it's possible for function
1010        thunks from the second implib to be used but without the
1011        head/tail objects, causing an improper import table.  We detect
1012        those cases and rename the "other" import libraries to match
1013        the one the head/tail come from, so that the linker will sort
1014        things nicely and produce a valid import table.  */
1015
1016     LANG_FOR_EACH_INPUT_STATEMENT (is)
1017       {
1018         if (is->the_bfd->my_archive)
1019           {
1020             int idata2 = 0, reloc_count=0, is_imp = 0;
1021             asection *sec;
1022
1023             /* See if this is an import library thunk.  */
1024             for (sec = is->the_bfd->sections; sec; sec = sec->next)
1025               {
1026                 if (strcmp (sec->name, ".idata\$2") == 0)
1027                   idata2 = 1;
1028                 if (CONST_STRNEQ (sec->name, ".idata\$"))
1029                   is_imp = 1;
1030                 reloc_count += sec->reloc_count;
1031               }
1032
1033             if (is_imp && !idata2 && reloc_count)
1034               {
1035                 /* It is, look for the reference to head and see if it's
1036                    from our own library.  */
1037                 for (sec = is->the_bfd->sections; sec; sec = sec->next)
1038                   {
1039                     int i;
1040                     long relsize;
1041                     asymbol **symbols;
1042                     arelent **relocs;
1043                     int nrelocs;
1044
1045                     relsize = bfd_get_reloc_upper_bound (is->the_bfd, sec);
1046                     if (relsize < 1)
1047                       break;
1048
1049                     if (!bfd_generic_link_read_symbols (is->the_bfd))
1050                       {
1051                         einfo (_("%B%F: could not read symbols: %E\n"),
1052                                is->the_bfd);
1053                         return;
1054                       }
1055                     symbols = bfd_get_outsymbols (is->the_bfd);
1056
1057                     relocs = xmalloc ((size_t) relsize);
1058                     nrelocs = bfd_canonicalize_reloc (is->the_bfd, sec,
1059                                                       relocs, symbols);
1060                     if (nrelocs < 0)
1061                       {
1062                         free (relocs);
1063                         einfo ("%X%P: unable to process relocs: %E\n");
1064                         return;
1065                       }
1066
1067                     for (i = 0; i < nrelocs; i++)
1068                       {
1069                         struct bfd_symbol *s;
1070                         struct bfd_link_hash_entry * blhe;
1071                         char *other_bfd_filename;
1072                         char *n;
1073
1074                         s = (relocs[i]->sym_ptr_ptr)[0];
1075
1076                         if (s->flags & BSF_LOCAL)
1077                           continue;
1078
1079                         /* Thunk section with reloc to another bfd.  */
1080                         blhe = bfd_link_hash_lookup (link_info.hash,
1081                                                      s->name,
1082                                                      FALSE, FALSE, TRUE);
1083
1084                         if (blhe == NULL
1085                             || blhe->type != bfd_link_hash_defined)
1086                           continue;
1087
1088                         other_bfd_filename
1089                           = blhe->u.def.section->owner->my_archive
1090                             ? bfd_get_filename (blhe->u.def.section->owner->my_archive)
1091                             : bfd_get_filename (blhe->u.def.section->owner);
1092
1093                         if (strcmp (bfd_get_filename (is->the_bfd->my_archive),
1094                                     other_bfd_filename) == 0)
1095                           continue;
1096
1097                         /* Rename this implib to match the other one.  */
1098                         n = xmalloc (strlen (other_bfd_filename) + 1);
1099                         strcpy (n, other_bfd_filename);
1100                         is->the_bfd->my_archive->filename = n;
1101                       }
1102
1103                     free (relocs);
1104                     /* Note - we do not free the symbols,
1105                        they are now cached in the BFD.  */
1106                   }
1107               }
1108           }
1109       }
1110   }
1111
1112   {
1113     int is_ms_arch = 0;
1114     bfd *cur_arch = 0;
1115     lang_input_statement_type *is2;
1116     lang_input_statement_type *is3;
1117
1118     /* Careful - this is a shell script.  Watch those dollar signs! */
1119     /* Microsoft import libraries have every member named the same,
1120        and not in the right order for us to link them correctly.  We
1121        must detect these and rename the members so that they'll link
1122        correctly.  There are three types of objects: the head, the
1123        thunks, and the sentinel(s).  The head is easy; it's the one
1124        with idata2.  We assume that the sentinels won't have relocs,
1125        and the thunks will.  It's easier than checking the symbol
1126        table for external references.  */
1127     LANG_FOR_EACH_INPUT_STATEMENT (is)
1128       {
1129         if (is->the_bfd->my_archive)
1130           {
1131             char *pnt;
1132             bfd *arch = is->the_bfd->my_archive;
1133
1134             if (cur_arch != arch)
1135               {
1136                 cur_arch = arch;
1137                 is_ms_arch = 1;
1138
1139                 for (is3 = is;
1140                      is3 && is3->the_bfd->my_archive == arch;
1141                      is3 = (lang_input_statement_type *) is3->next)
1142                   {
1143                     /* A MS dynamic import library can also contain static
1144                        members, so look for the first element with a .dll
1145                        extension, and use that for the remainder of the
1146                        comparisons.  */
1147                     pnt = strrchr (is3->the_bfd->filename, '.');
1148                     if (pnt != NULL && strcmp (pnt, ".dll") == 0)
1149                       break;
1150                   }
1151
1152                 if (is3 == NULL)
1153                   is_ms_arch = 0;
1154                 else
1155                   {
1156                     /* OK, found one.  Now look to see if the remaining
1157                        (dynamic import) members use the same name.  */
1158                     for (is2 = is;
1159                          is2 && is2->the_bfd->my_archive == arch;
1160                          is2 = (lang_input_statement_type *) is2->next)
1161                       {
1162                         /* Skip static members, ie anything with a .obj
1163                            extension.  */
1164                         pnt = strrchr (is2->the_bfd->filename, '.');
1165                         if (pnt != NULL && strcmp (pnt, ".obj") == 0)
1166                           continue;
1167
1168                         if (strcmp (is3->the_bfd->filename,
1169                                     is2->the_bfd->filename))
1170                           {
1171                             is_ms_arch = 0;
1172                             break;
1173                           }
1174                       }
1175                   }
1176               }
1177
1178             /* This fragment might have come from an .obj file in a Microsoft
1179                import, and not an actual import record. If this is the case,
1180                then leave the filename alone.  */
1181             pnt = strrchr (is->the_bfd->filename, '.');
1182
1183             if (is_ms_arch && (strcmp (pnt, ".dll") == 0))
1184               {
1185                 int idata2 = 0, reloc_count=0;
1186                 asection *sec;
1187                 char *new_name, seq;
1188
1189                 for (sec = is->the_bfd->sections; sec; sec = sec->next)
1190                   {
1191                     if (strcmp (sec->name, ".idata\$2") == 0)
1192                       idata2 = 1;
1193                     reloc_count += sec->reloc_count;
1194                   }
1195
1196                 if (idata2) /* .idata2 is the TOC */
1197                   seq = 'a';
1198                 else if (reloc_count > 0) /* thunks */
1199                   seq = 'b';
1200                 else /* sentinel */
1201                   seq = 'c';
1202
1203                 new_name = xmalloc (strlen (is->the_bfd->filename) + 3);
1204                 sprintf (new_name, "%s.%c", is->the_bfd->filename, seq);
1205                 is->the_bfd->filename = new_name;
1206
1207                 new_name = xmalloc (strlen (is->filename) + 3);
1208                 sprintf (new_name, "%s.%c", is->filename, seq);
1209                 is->filename = new_name;
1210               }
1211           }
1212       }
1213   }
1214 }
1215 \f
1216 static void
1217 gld_${EMULATION_NAME}_before_allocation (void)
1218 {
1219   before_allocation_default ();
1220 }
1221 \f
1222 #ifdef DLL_SUPPORT
1223 /* This is called when an input file isn't recognized as a BFD.  We
1224    check here for .DEF files and pull them in automatically.  */
1225
1226 static int
1227 saw_option (char *option)
1228 {
1229   int i;
1230
1231   for (i = 0; init[i].ptr; i++)
1232     if (strcmp (init[i].symbol, option) == 0)
1233       return init[i].inited;
1234   return 0;
1235 }
1236 #endif /* DLL_SUPPORT */
1237
1238 static bfd_boolean
1239 gld_${EMULATION_NAME}_unrecognized_file (lang_input_statement_type *entry ATTRIBUTE_UNUSED)
1240 {
1241 #ifdef DLL_SUPPORT
1242   const char *ext = entry->filename + strlen (entry->filename) - 4;
1243
1244   if (strcmp (ext, ".def") == 0 || strcmp (ext, ".DEF") == 0)
1245     {
1246       pep_def_file = def_file_parse (entry->filename, pep_def_file);
1247
1248       if (pep_def_file)
1249         {
1250           int i, buflen=0, len;
1251           char *buf;
1252
1253           for (i = 0; i < pep_def_file->num_exports; i++)
1254             {
1255               len = strlen (pep_def_file->exports[i].internal_name);
1256               if (buflen < len + 2)
1257                 buflen = len + 2;
1258             }
1259
1260           buf = xmalloc (buflen);
1261
1262           for (i = 0; i < pep_def_file->num_exports; i++)
1263             {
1264               struct bfd_link_hash_entry *h;
1265
1266               sprintf (buf, "_%s", pep_def_file->exports[i].internal_name);
1267
1268               h = bfd_link_hash_lookup (link_info.hash, buf, TRUE, TRUE, TRUE);
1269               if (h == (struct bfd_link_hash_entry *) NULL)
1270                 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
1271               if (h->type == bfd_link_hash_new)
1272                 {
1273                   h->type = bfd_link_hash_undefined;
1274                   h->u.undef.abfd = NULL;
1275                   bfd_link_add_undef (link_info.hash, h);
1276                 }
1277             }
1278           free (buf);
1279
1280           /* def_file_print (stdout, pep_def_file); */
1281           if (pep_def_file->is_dll == 1)
1282             link_info.shared = 1;
1283
1284           if (pep_def_file->base_address != (bfd_vma)(-1))
1285             {
1286               pep.ImageBase
1287                 = pe_data (link_info.output_bfd)->pe_opthdr.ImageBase
1288                 = init[IMAGEBASEOFF].value
1289                 = pep_def_file->base_address;
1290               init[IMAGEBASEOFF].inited = 1;
1291               if (image_base_statement)
1292                 image_base_statement->exp = exp_assop ('=', "__image_base__",
1293                                                        exp_intop (pep.ImageBase));
1294             }
1295
1296           if (pep_def_file->stack_reserve != -1
1297               && ! saw_option ("__size_of_stack_reserve__"))
1298             {
1299               pep.SizeOfStackReserve = pep_def_file->stack_reserve;
1300               if (pep_def_file->stack_commit != -1)
1301                 pep.SizeOfStackCommit = pep_def_file->stack_commit;
1302             }
1303           if (pep_def_file->heap_reserve != -1
1304               && ! saw_option ("__size_of_heap_reserve__"))
1305             {
1306               pep.SizeOfHeapReserve = pep_def_file->heap_reserve;
1307               if (pep_def_file->heap_commit != -1)
1308                 pep.SizeOfHeapCommit = pep_def_file->heap_commit;
1309             }
1310           return TRUE;
1311         }
1312     }
1313 #endif
1314   return FALSE;
1315 }
1316
1317 static bfd_boolean
1318 gld_${EMULATION_NAME}_recognized_file (lang_input_statement_type *entry ATTRIBUTE_UNUSED)
1319 {
1320 #ifdef DLL_SUPPORT
1321 #ifdef TARGET_IS_i386pep
1322   pep_dll_id_target ("pei-x86-64");
1323 #endif
1324   if (pep_bfd_is_dll (entry->the_bfd))
1325     return pep_implied_import_dll (entry->filename);
1326 #endif
1327   return FALSE;
1328 }
1329
1330 static void
1331 gld_${EMULATION_NAME}_finish (void)
1332 {
1333   finish_default ();
1334
1335 #ifdef DLL_SUPPORT
1336   if (link_info.shared
1337       || (!link_info.relocatable && pep_def_file->num_exports != 0))
1338     {
1339       pep_dll_fill_sections (link_info.output_bfd, &link_info);
1340       if (pep_implib_filename)
1341         pep_dll_generate_implib (pep_def_file, pep_implib_filename);
1342     }
1343
1344   if (pep_out_def_filename)
1345     pep_dll_generate_def_file (pep_out_def_filename);
1346 #endif /* DLL_SUPPORT */
1347
1348   /* I don't know where .idata gets set as code, but it shouldn't be.  */
1349   {
1350     asection *asec = bfd_get_section_by_name (link_info.output_bfd, ".idata");
1351
1352     if (asec)
1353       {
1354         asec->flags &= ~SEC_CODE;
1355         asec->flags |= SEC_DATA;
1356       }
1357   }
1358 }
1359
1360 \f
1361 /* Place an orphan section.
1362
1363    We use this to put sections in a reasonable place in the file, and
1364    to ensure that they are aligned as required.
1365
1366    We handle grouped sections here as well.  A section named .foo$nn
1367    goes into the output section .foo.  All grouped sections are sorted
1368    by name.
1369
1370    Grouped sections for the default sections are handled by the
1371    default linker script using wildcards, and are sorted by
1372    sort_sections.  */
1373
1374 static bfd_boolean
1375 gld_${EMULATION_NAME}_place_orphan (asection *s,
1376                                     const char *secname,
1377                                     int constraint)
1378 {
1379   const char *orig_secname = secname;
1380   char *dollar = NULL;
1381   lang_output_section_statement_type *os;
1382   lang_statement_list_type add_child;
1383
1384   /* Look through the script to see where to place this section.  */
1385   if (!link_info.relocatable
1386       && (dollar = strchr (secname, '$')) != NULL)
1387     {
1388       size_t len = dollar - secname;
1389       char *newname = xmalloc (len + 1);
1390       memcpy (newname, secname, len);
1391       newname[len] = '\0';
1392       secname = newname;
1393     }
1394
1395   lang_list_init (&add_child);
1396
1397   if (constraint == 0
1398       && (os = lang_output_section_find (secname)) != NULL
1399       && os->bfd_section != NULL
1400       && (os->bfd_section->flags == 0
1401           || ((s->flags ^ os->bfd_section->flags)
1402               & (SEC_LOAD | SEC_ALLOC)) == 0))
1403     {
1404       /* We already have an output section statement with this
1405          name, and its bfd section has compatible flags.
1406          If the section already exists but does not have any flags set,
1407          then it has been created by the linker, probably as a result of
1408          a --section-start command line switch.  */
1409       lang_add_section (&add_child, s, os);
1410     }
1411   else
1412     {
1413       static struct orphan_save hold[] =
1414         {
1415           { ".text",
1416             SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1417             0, 0, 0, 0 },
1418           { ".rdata",
1419             SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1420             0, 0, 0, 0 },
1421           { ".data",
1422             SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1423             0, 0, 0, 0 },
1424           { ".bss",
1425             SEC_ALLOC,
1426             0, 0, 0, 0 }
1427         };
1428       enum orphan_save_index
1429         {
1430           orphan_text = 0,
1431           orphan_rodata,
1432           orphan_data,
1433           orphan_bss
1434         };
1435       static int orphan_init_done = 0;
1436       struct orphan_save *place;
1437       lang_output_section_statement_type *after;
1438       etree_type *address;
1439
1440       if (!orphan_init_done)
1441         {
1442           struct orphan_save *ho;
1443           for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1444             if (ho->name != NULL)
1445               {
1446                 ho->os = lang_output_section_find (ho->name);
1447                 if (ho->os != NULL && ho->os->flags == 0)
1448                   ho->os->flags = ho->flags;
1449               }
1450           orphan_init_done = 1;
1451         }
1452
1453       /* Try to put the new output section in a reasonable place based
1454          on the section name and section flags.  */
1455
1456       place = NULL;
1457       if ((s->flags & SEC_ALLOC) == 0)
1458         ;
1459       else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
1460         place = &hold[orphan_bss];
1461       else if ((s->flags & SEC_READONLY) == 0)
1462         place = &hold[orphan_data];
1463       else if ((s->flags & SEC_CODE) == 0)
1464         place = &hold[orphan_rodata];
1465       else
1466         place = &hold[orphan_text];
1467
1468       after = NULL;
1469       if (place != NULL)
1470         {
1471           if (place->os == NULL)
1472             place->os = lang_output_section_find (place->name);
1473           after = place->os;
1474           if (after == NULL)
1475             after = lang_output_section_find_by_flags (s, &place->os, NULL);
1476           if (after == NULL)
1477             /* *ABS* is always the first output section statement.  */
1478             after = (&lang_output_section_statement.head
1479                      ->output_section_statement);
1480         }
1481
1482       /* All sections in an executable must be aligned to a page boundary.  */
1483       address = exp_unop (ALIGN_K, exp_nameop (NAME, "__section_alignment__"));
1484       os = lang_insert_orphan (s, secname, constraint, after, place, address,
1485                                &add_child);
1486     }
1487
1488   {
1489     lang_statement_union_type **pl = &os->children.head;
1490
1491     if (dollar != NULL)
1492       {
1493         bfd_boolean found_dollar;
1494
1495         /* The section name has a '$'.  Sort it with the other '$'
1496            sections.  */
1497         found_dollar = FALSE;
1498         for ( ; *pl != NULL; pl = &(*pl)->header.next)
1499           {
1500             lang_input_section_type *ls;
1501             const char *lname;
1502
1503             if ((*pl)->header.type != lang_input_section_enum)
1504               continue;
1505
1506             ls = &(*pl)->input_section;
1507
1508             lname = bfd_get_section_name (ls->section->owner, ls->section);
1509             if (strchr (lname, '$') == NULL)
1510               {
1511                 if (found_dollar)
1512                   break;
1513               }
1514             else
1515               {
1516                 found_dollar = TRUE;
1517                 if (strcmp (orig_secname, lname) < 0)
1518                   break;
1519               }
1520           }
1521       }
1522
1523     if (add_child.head != NULL)
1524       {
1525         add_child.head->header.next = *pl;
1526         *pl = add_child.head;
1527       }
1528   }
1529
1530   return TRUE;
1531 }
1532
1533 static bfd_boolean
1534 gld_${EMULATION_NAME}_open_dynamic_archive
1535   (const char *arch ATTRIBUTE_UNUSED,
1536    search_dirs_type *search,
1537    lang_input_statement_type *entry)
1538 {
1539   static const struct
1540     {
1541       const char * format;
1542       bfd_boolean use_prefix;
1543     }
1544   libname_fmt [] =
1545     {
1546       /* Preferred explicit import library for dll's.  */
1547       { "lib%s.dll.a", FALSE },
1548       /* Alternate explicit import library for dll's.  */
1549       { "%s.dll.a", FALSE },
1550       /* "libfoo.a" could be either an import lib or a static lib.
1551           For backwards compatibility, libfoo.a needs to precede
1552           libfoo.dll and foo.dll in the search.  */
1553       { "lib%s.a", FALSE },
1554       /* The 'native' spelling of an import lib name is "foo.lib".  */
1555       { "%s.lib", FALSE },
1556 #ifdef DLL_SUPPORT
1557       /* Try "<prefix>foo.dll" (preferred dll name, if specified).  */
1558       { "%s%s.dll", TRUE },
1559 #endif
1560       /* Try "libfoo.dll" (default preferred dll name).  */
1561       { "lib%s.dll", FALSE },
1562       /* Finally try 'native' dll name "foo.dll".  */
1563       {  "%s.dll", FALSE },
1564       /* Note: If adding more formats to this table, make sure to check to
1565          see if their length is longer than libname_fmt[0].format, and if
1566          so, update the call to xmalloc() below.  */
1567       { NULL, FALSE }
1568     };
1569   static unsigned int format_max_len = 0;
1570   const char * filename;
1571   char * full_string;
1572   char * base_string;
1573   unsigned int i;
1574
1575
1576   if (! entry->is_archive)
1577     return FALSE;
1578
1579   filename = entry->filename;
1580
1581   if (format_max_len == 0)
1582     /* We need to allow space in the memory that we are going to allocate
1583        for the characters in the format string.  Since the format array is
1584        static we only need to calculate this information once.  In theory
1585        this value could also be computed statically, but this introduces
1586        the possibility for a discrepancy and hence a possible memory
1587        corruption.  The lengths we compute here will be too long because
1588        they will include any formating characters (%s) in the strings, but
1589        this will not matter.  */
1590     for (i = 0; libname_fmt[i].format; i++)
1591       if (format_max_len < strlen (libname_fmt[i].format))
1592         format_max_len = strlen (libname_fmt[i].format);
1593
1594   full_string = xmalloc (strlen (search->name)
1595                          + strlen (filename)
1596                          + format_max_len
1597 #ifdef DLL_SUPPORT
1598                          + (pep_dll_search_prefix
1599                             ? strlen (pep_dll_search_prefix) : 0)
1600 #endif
1601                          /* Allow for the terminating NUL and for the path
1602                             separator character that is inserted between
1603                             search->name and the start of the format string.  */
1604                          + 2);
1605
1606   sprintf (full_string, "%s/", search->name);
1607   base_string = full_string + strlen (full_string);
1608
1609   for (i = 0; libname_fmt[i].format; i++)
1610     {
1611 #ifdef DLL_SUPPORT
1612       if (libname_fmt[i].use_prefix)
1613         {
1614           if (!pep_dll_search_prefix)
1615             continue;
1616           sprintf (base_string, libname_fmt[i].format, pep_dll_search_prefix, filename);
1617         }
1618       else
1619 #endif
1620         sprintf (base_string, libname_fmt[i].format, filename);
1621
1622       if (ldfile_try_open_bfd (full_string, entry))
1623         break;
1624     }
1625
1626   if (!libname_fmt[i].format)
1627     {
1628       free (full_string);
1629       return FALSE;
1630     }
1631
1632   entry->filename = full_string;
1633
1634   return TRUE;
1635 }
1636
1637 static int
1638 gld_${EMULATION_NAME}_find_potential_libraries
1639   (char *name, lang_input_statement_type *entry)
1640 {
1641   return ldfile_open_file_search (name, entry, "", ".lib");
1642 }
1643 \f
1644 static char *
1645 gld_${EMULATION_NAME}_get_script (int *isfile)
1646 EOF
1647 # Scripts compiled in.
1648 # sed commands to quote an ld script as a C string.
1649 sc="-f stringify.sed"
1650
1651 fragment <<EOF
1652 {
1653   *isfile = 0;
1654
1655   if (link_info.relocatable && config.build_constructors)
1656     return
1657 EOF
1658 sed $sc ldscripts/${EMULATION_NAME}.xu                  >> e${EMULATION_NAME}.c
1659 echo '  ; else if (link_info.relocatable) return'       >> e${EMULATION_NAME}.c
1660 sed $sc ldscripts/${EMULATION_NAME}.xr                  >> e${EMULATION_NAME}.c
1661 echo '  ; else if (!config.text_read_only) return'      >> e${EMULATION_NAME}.c
1662 sed $sc ldscripts/${EMULATION_NAME}.xbn                 >> e${EMULATION_NAME}.c
1663 echo '  ; else if (!config.magic_demand_paged) return'  >> e${EMULATION_NAME}.c
1664 sed $sc ldscripts/${EMULATION_NAME}.xn                  >> e${EMULATION_NAME}.c
1665 if test -n "$GENERATE_AUTO_IMPORT_SCRIPT" ; then
1666 echo '  ; else if (link_info.pei386_auto_import == 1) return'   >> e${EMULATION_NAME}.c
1667 sed $sc ldscripts/${EMULATION_NAME}.xa                  >> e${EMULATION_NAME}.c
1668 fi
1669 echo '  ; else return'                                  >> e${EMULATION_NAME}.c
1670 sed $sc ldscripts/${EMULATION_NAME}.x                   >> e${EMULATION_NAME}.c
1671 echo '; }'                                              >> e${EMULATION_NAME}.c
1672
1673 fragment <<EOF
1674
1675
1676 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
1677 {
1678   gld_${EMULATION_NAME}_before_parse,
1679   syslib_default,
1680   hll_default,
1681   gld_${EMULATION_NAME}_after_parse,
1682   gld_${EMULATION_NAME}_after_open,
1683   after_allocation_default,
1684   set_output_arch_default,
1685   ldemul_default_target,
1686   gld_${EMULATION_NAME}_before_allocation,
1687   gld_${EMULATION_NAME}_get_script,
1688   "${EMULATION_NAME}",
1689   "${OUTPUT_FORMAT}",
1690   gld_${EMULATION_NAME}_finish,
1691   NULL, /* Create output section statements.  */
1692   gld_${EMULATION_NAME}_open_dynamic_archive,
1693   gld_${EMULATION_NAME}_place_orphan,
1694   gld_${EMULATION_NAME}_set_symbols,
1695   NULL, /* parse_args */
1696   gld${EMULATION_NAME}_add_options,
1697   gld${EMULATION_NAME}_handle_option,
1698   gld_${EMULATION_NAME}_unrecognized_file,
1699   gld_${EMULATION_NAME}_list_options,
1700   gld_${EMULATION_NAME}_recognized_file,
1701   gld_${EMULATION_NAME}_find_potential_libraries,
1702   NULL  /* new_vers_pattern.  */
1703 };
1704 EOF