1# This shell script emits a C file. -*- C -*- 2# It does some substitutions. 3if [ -z "$MACHINE" ]; then 4 OUTPUT_ARCH=${ARCH} 5else 6 OUTPUT_ARCH=${ARCH}:${MACHINE} 7fi 8 9case ${target} in 10 *-*-cygwin*) 11 move_default_addr_high=1 12 ;; 13 *) 14 move_default_addr_high=0; 15 ;; 16esac 17 18rm -f e${EMULATION_NAME}.c 19(echo;echo;echo;echo;echo)>e${EMULATION_NAME}.c # there, now line numbers match ;-) 20fragment <<EOF 21/* Copyright (C) 2006-2020 Free Software Foundation, Inc. 22 Written by Kai Tietz, OneVision Software GmbH&CoKg. 23 24 This file is part of the GNU Binutils. 25 26 This program is free software; you can redistribute it and/or modify 27 it under the terms of the GNU General Public License as published by 28 the Free Software Foundation; either version 3 of the License, or 29 (at your option) any later version. 30 31 This program is distributed in the hope that it will be useful, 32 but WITHOUT ANY WARRANTY; without even the implied warranty of 33 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 34 GNU General Public License for more details. 35 36 You should have received a copy of the GNU General Public License 37 along with this program; if not, write to the Free Software 38 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 39 MA 02110-1301, USA. */ 40 41 42/* For WINDOWS_XP64 and higher */ 43/* Based on pe.em, but modified for 64 bit support. */ 44 45#define TARGET_IS_${EMULATION_NAME} 46 47#define COFF_IMAGE_WITH_PE 48#define COFF_WITH_PE 49#define COFF_WITH_pex64 50 51#include "sysdep.h" 52#include "bfd.h" 53#include "bfdlink.h" 54#include "ctf-api.h" 55#include "getopt.h" 56#include "libiberty.h" 57#include "filenames.h" 58#include "ld.h" 59#include "ldmain.h" 60#include "ldexp.h" 61#include "ldlang.h" 62#include "ldfile.h" 63#include "ldemul.h" 64#include <ldgram.h> 65#include "ldlex.h" 66#include "ldmisc.h" 67#include "ldctor.h" 68#include "ldbuildid.h" 69#include "coff/internal.h" 70 71/* FIXME: See bfd/peXXigen.c for why we include an architecture specific 72 header in generic PE code. */ 73#include "coff/x86_64.h" 74#include "coff/pe.h" 75 76/* FIXME: These are BFD internal header files, and we should not be 77 using it here. */ 78#include "../bfd/libcoff.h" 79#include "../bfd/libpei.h" 80 81#undef AOUTSZ 82#define AOUTSZ PEPAOUTSZ 83#define PEAOUTHDR PEPAOUTHDR 84 85#include "deffile.h" 86#include "pep-dll.h" 87#include "safe-ctype.h" 88 89/* Permit the emulation parameters to override the default section 90 alignment by setting OVERRIDE_SECTION_ALIGNMENT. FIXME: This makes 91 it seem that include/coff/internal.h should not define 92 PE_DEF_SECTION_ALIGNMENT. */ 93#if PE_DEF_SECTION_ALIGNMENT != ${OVERRIDE_SECTION_ALIGNMENT:-PE_DEF_SECTION_ALIGNMENT} 94#undef PE_DEF_SECTION_ALIGNMENT 95#define PE_DEF_SECTION_ALIGNMENT ${OVERRIDE_SECTION_ALIGNMENT} 96#endif 97 98#ifdef TARGET_IS_i386pep 99#define DLL_SUPPORT 100#endif 101 102#if defined(TARGET_IS_i386pep) || ! defined(DLL_SUPPORT) 103#define PE_DEF_SUBSYSTEM 3 104#undef NT_EXE_IMAGE_BASE 105#define NT_EXE_IMAGE_BASE \ 106 ((bfd_vma) (${move_default_addr_high} ? 0x100400000LL \ 107 : 0x400000LL)) 108#undef NT_DLL_IMAGE_BASE 109#define NT_DLL_IMAGE_BASE \ 110 ((bfd_vma) (${move_default_addr_high} ? 0x400000000LL \ 111 : 0x10000000LL)) 112#undef NT_DLL_AUTO_IMAGE_BASE 113#define NT_DLL_AUTO_IMAGE_BASE \ 114 ((bfd_vma) (${move_default_addr_high} ? 0x400000000LL \ 115 : 0x61300000LL)) 116#undef NT_DLL_AUTO_IMAGE_MASK 117#define NT_DLL_AUTO_IMAGE_MASK \ 118 ((bfd_vma) (${move_default_addr_high} ? 0x1ffff0000LL \ 119 : 0x0ffc0000LL)) 120#else 121#undef NT_EXE_IMAGE_BASE 122#define NT_EXE_IMAGE_BASE \ 123 ((bfd_vma) (${move_default_addr_high} ? 0x100010000LL \ 124 : 0x10000LL)) 125#undef NT_DLL_IMAGE_BASE 126#define NT_DLL_IMAGE_BASE \ 127 ((bfd_vma) (${move_default_addr_high} ? 0x110000000LL \ 128 : 0x10000000LL)) 129#undef NT_DLL_AUTO_IMAGE_BASE 130#define NT_DLL_AUTO_IMAGE_BASE \ 131 ((bfd_vma) (${move_default_addr_high} ? 0x120000000LL \ 132 : 0x61300000LL)) 133#undef NT_DLL_AUTO_IMAGE_MASK 134#define NT_DLL_AUTO_IMAGE_MASK \ 135 ((bfd_vma) (${move_default_addr_high} ? 0x0ffff0000LL \ 136 : 0x0ffc0000LL)) 137#undef PE_DEF_SECTION_ALIGNMENT 138#define PE_DEF_SUBSYSTEM 2 139#undef PE_DEF_FILE_ALIGNMENT 140#define PE_DEF_FILE_ALIGNMENT 0x00000200 141#define PE_DEF_SECTION_ALIGNMENT 0x00000400 142#endif 143 144static struct internal_extra_pe_aouthdr pep; 145static int dll; 146static int pep_subsystem = ${SUBSYSTEM}; 147static flagword real_flags = IMAGE_FILE_LARGE_ADDRESS_AWARE; 148static int support_old_code = 0; 149static lang_assignment_statement_type *image_base_statement = 0; 150static unsigned short pe_dll_characteristics = 0; 151static bfd_boolean insert_timestamp = TRUE; 152static const char *emit_build_id; 153 154#ifdef DLL_SUPPORT 155static int pep_enable_stdcall_fixup = 1; /* 0=disable 1=enable (default). */ 156static char * pep_out_def_filename = NULL; 157static int pep_enable_auto_image_base = 0; 158static char * pep_dll_search_prefix = NULL; 159#endif 160 161extern const char *output_filename; 162 163static int is_underscoring (void) 164{ 165 int u = 0; 166 if (pep_leading_underscore != -1) 167 return pep_leading_underscore; 168 if (!bfd_get_target_info ("${OUTPUT_FORMAT}", NULL, NULL, &u, NULL)) 169 bfd_get_target_info ("${RELOCATEABLE_OUTPUT_FORMAT}", NULL, NULL, &u, NULL); 170 171 if (u == -1) 172 abort (); 173 pep_leading_underscore = (u != 0 ? 1 : 0); 174 return pep_leading_underscore; 175} 176 177 178static void 179gld_${EMULATION_NAME}_before_parse (void) 180{ 181 is_underscoring (); 182 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`); 183 output_filename = "${EXECUTABLE_NAME:-a.exe}"; 184#ifdef DLL_SUPPORT 185 input_flags.dynamic = TRUE; 186 config.has_shared = 1; 187 link_info.pei386_auto_import = 1; 188 link_info.pei386_runtime_pseudo_reloc = 2; /* Use by default version 2. */ 189#endif 190} 191 192/* PE format extra command line options. */ 193 194/* Used for setting flags in the PE header. */ 195enum options 196{ 197 OPTION_BASE_FILE = 300 + 1, 198 OPTION_DLL, 199 OPTION_FILE_ALIGNMENT, 200 OPTION_IMAGE_BASE, 201 OPTION_MAJOR_IMAGE_VERSION, 202 OPTION_MAJOR_OS_VERSION, 203 OPTION_MAJOR_SUBSYSTEM_VERSION, 204 OPTION_MINOR_IMAGE_VERSION, 205 OPTION_MINOR_OS_VERSION, 206 OPTION_MINOR_SUBSYSTEM_VERSION, 207 OPTION_SECTION_ALIGNMENT, 208 OPTION_STACK, 209 OPTION_SUBSYSTEM, 210 OPTION_HEAP, 211 OPTION_SUPPORT_OLD_CODE, 212 OPTION_OUT_DEF, 213 OPTION_EXPORT_ALL, 214 OPTION_EXCLUDE_SYMBOLS, 215 OPTION_EXCLUDE_ALL_SYMBOLS, 216 OPTION_KILL_ATS, 217 OPTION_STDCALL_ALIASES, 218 OPTION_ENABLE_STDCALL_FIXUP, 219 OPTION_DISABLE_STDCALL_FIXUP, 220 OPTION_WARN_DUPLICATE_EXPORTS, 221 OPTION_IMP_COMPAT, 222 OPTION_ENABLE_AUTO_IMAGE_BASE, 223 OPTION_DISABLE_AUTO_IMAGE_BASE, 224 OPTION_DLL_SEARCH_PREFIX, 225 OPTION_NO_DEFAULT_EXCLUDES, 226 OPTION_DLL_ENABLE_AUTO_IMPORT, 227 OPTION_DLL_DISABLE_AUTO_IMPORT, 228 OPTION_ENABLE_EXTRA_PE_DEBUG, 229 OPTION_EXCLUDE_LIBS, 230 OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC, 231 OPTION_DLL_DISABLE_RUNTIME_PSEUDO_RELOC, 232 OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V2, 233 OPTION_EXCLUDE_MODULES_FOR_IMPLIB, 234 OPTION_USE_NUL_PREFIXED_IMPORT_TABLES, 235 OPTION_NO_LEADING_UNDERSCORE, 236 OPTION_LEADING_UNDERSCORE, 237 OPTION_ENABLE_LONG_SECTION_NAMES, 238 OPTION_DISABLE_LONG_SECTION_NAMES, 239 OPTION_HIGH_ENTROPY_VA, 240 OPTION_DYNAMIC_BASE, 241 OPTION_FORCE_INTEGRITY, 242 OPTION_NX_COMPAT, 243 OPTION_NO_ISOLATION, 244 OPTION_NO_SEH, 245 OPTION_NO_BIND, 246 OPTION_WDM_DRIVER, 247 OPTION_INSERT_TIMESTAMP, 248 OPTION_NO_INSERT_TIMESTAMP, 249 OPTION_TERMINAL_SERVER_AWARE, 250 OPTION_BUILD_ID, 251 OPTION_ENABLE_RELOC_SECTION 252}; 253 254static void 255gld${EMULATION_NAME}_add_options 256 (int ns ATTRIBUTE_UNUSED, 257 char **shortopts ATTRIBUTE_UNUSED, 258 int nl, 259 struct option **longopts, 260 int nrl ATTRIBUTE_UNUSED, 261 struct option **really_longopts ATTRIBUTE_UNUSED) 262{ 263 static const struct option xtra_long[] = 264 { 265 /* PE options */ 266 {"base-file", required_argument, NULL, OPTION_BASE_FILE}, 267 {"dll", no_argument, NULL, OPTION_DLL}, 268 {"file-alignment", required_argument, NULL, OPTION_FILE_ALIGNMENT}, 269 {"heap", required_argument, NULL, OPTION_HEAP}, 270 {"image-base", required_argument, NULL, OPTION_IMAGE_BASE}, 271 {"major-image-version", required_argument, NULL, OPTION_MAJOR_IMAGE_VERSION}, 272 {"major-os-version", required_argument, NULL, OPTION_MAJOR_OS_VERSION}, 273 {"major-subsystem-version", required_argument, NULL, OPTION_MAJOR_SUBSYSTEM_VERSION}, 274 {"minor-image-version", required_argument, NULL, OPTION_MINOR_IMAGE_VERSION}, 275 {"minor-os-version", required_argument, NULL, OPTION_MINOR_OS_VERSION}, 276 {"minor-subsystem-version", required_argument, NULL, OPTION_MINOR_SUBSYSTEM_VERSION}, 277 {"section-alignment", required_argument, NULL, OPTION_SECTION_ALIGNMENT}, 278 {"stack", required_argument, NULL, OPTION_STACK}, 279 {"subsystem", required_argument, NULL, OPTION_SUBSYSTEM}, 280 {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE}, 281 {"use-nul-prefixed-import-tables", no_argument, NULL, 282 OPTION_USE_NUL_PREFIXED_IMPORT_TABLES}, 283 {"no-leading-underscore", no_argument, NULL, OPTION_NO_LEADING_UNDERSCORE}, 284 {"leading-underscore", no_argument, NULL, OPTION_LEADING_UNDERSCORE}, 285#ifdef DLL_SUPPORT 286 /* getopt allows abbreviations, so we do this to stop it 287 from treating -o as an abbreviation for this option. */ 288 {"output-def", required_argument, NULL, OPTION_OUT_DEF}, 289 {"output-def", required_argument, NULL, OPTION_OUT_DEF}, 290 {"export-all-symbols", no_argument, NULL, OPTION_EXPORT_ALL}, 291 {"exclude-symbols", required_argument, NULL, OPTION_EXCLUDE_SYMBOLS}, 292 {"exclude-all-symbols", no_argument, NULL, OPTION_EXCLUDE_ALL_SYMBOLS}, 293 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS}, 294 {"exclude-modules-for-implib", required_argument, NULL, OPTION_EXCLUDE_MODULES_FOR_IMPLIB}, 295 {"kill-at", no_argument, NULL, OPTION_KILL_ATS}, 296 {"add-stdcall-alias", no_argument, NULL, OPTION_STDCALL_ALIASES}, 297 {"enable-stdcall-fixup", no_argument, NULL, OPTION_ENABLE_STDCALL_FIXUP}, 298 {"disable-stdcall-fixup", no_argument, NULL, OPTION_DISABLE_STDCALL_FIXUP}, 299 {"warn-duplicate-exports", no_argument, NULL, OPTION_WARN_DUPLICATE_EXPORTS}, 300 /* getopt() allows abbreviations, so we do this to stop it from 301 treating -c as an abbreviation for these --compat-implib. */ 302 {"compat-implib", no_argument, NULL, OPTION_IMP_COMPAT}, 303 {"compat-implib", no_argument, NULL, OPTION_IMP_COMPAT}, 304 {"enable-auto-image-base", no_argument, NULL, OPTION_ENABLE_AUTO_IMAGE_BASE}, 305 {"disable-auto-image-base", no_argument, NULL, OPTION_DISABLE_AUTO_IMAGE_BASE}, 306 {"dll-search-prefix", required_argument, NULL, OPTION_DLL_SEARCH_PREFIX}, 307 {"no-default-excludes", no_argument, NULL, OPTION_NO_DEFAULT_EXCLUDES}, 308 {"enable-auto-import", no_argument, NULL, OPTION_DLL_ENABLE_AUTO_IMPORT}, 309 {"disable-auto-import", no_argument, NULL, OPTION_DLL_DISABLE_AUTO_IMPORT}, 310 {"enable-extra-pep-debug", no_argument, NULL, OPTION_ENABLE_EXTRA_PE_DEBUG}, 311 {"enable-runtime-pseudo-reloc", no_argument, NULL, OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC}, 312 {"disable-runtime-pseudo-reloc", no_argument, NULL, OPTION_DLL_DISABLE_RUNTIME_PSEUDO_RELOC}, 313 {"enable-runtime-pseudo-reloc-v2", no_argument, NULL, OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V2}, 314#endif 315 {"enable-long-section-names", no_argument, NULL, OPTION_ENABLE_LONG_SECTION_NAMES}, 316 {"disable-long-section-names", no_argument, NULL, OPTION_DISABLE_LONG_SECTION_NAMES}, 317 {"high-entropy-va", no_argument, NULL, OPTION_HIGH_ENTROPY_VA}, 318 {"dynamicbase",no_argument, NULL, OPTION_DYNAMIC_BASE}, 319 {"forceinteg", no_argument, NULL, OPTION_FORCE_INTEGRITY}, 320 {"nxcompat", no_argument, NULL, OPTION_NX_COMPAT}, 321 {"no-isolation", no_argument, NULL, OPTION_NO_ISOLATION}, 322 {"no-seh", no_argument, NULL, OPTION_NO_SEH}, 323 {"no-bind", no_argument, NULL, OPTION_NO_BIND}, 324 {"wdmdriver", no_argument, NULL, OPTION_WDM_DRIVER}, 325 {"tsaware", no_argument, NULL, OPTION_TERMINAL_SERVER_AWARE}, 326 {"insert-timestamp", no_argument, NULL, OPTION_INSERT_TIMESTAMP}, 327 {"no-insert-timestamp", no_argument, NULL, OPTION_NO_INSERT_TIMESTAMP}, 328 {"build-id", optional_argument, NULL, OPTION_BUILD_ID}, 329 {"enable-reloc-section", no_argument, NULL, OPTION_ENABLE_RELOC_SECTION}, 330 {NULL, no_argument, NULL, 0} 331 }; 332 333 *longopts 334 = xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long)); 335 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long)); 336} 337 338/* PE/WIN32; added routines to get the subsystem type, heap and/or stack 339 parameters which may be input from the command line. */ 340 341typedef struct 342{ 343 void *ptr; 344 int size; 345 bfd_vma value; 346 char *symbol; 347 int inited; 348 /* FALSE for an assembly level symbol and TRUE for a C visible symbol. 349 C visible symbols can be prefixed by underscore dependent on target's 350 settings. */ 351 bfd_boolean is_c_symbol; 352} definfo; 353 354#define GET_INIT_SYMBOL_NAME(IDX) \ 355 (init[(IDX)].symbol \ 356 + ((!init[(IDX)].is_c_symbol || is_underscoring () == 1) ? 0 : 1)) 357 358/* Decorates the C visible symbol by underscore, if target requires. */ 359#define U(CSTR) \ 360 ((is_underscoring () == 0) ? CSTR : "_" CSTR) 361 362#define D(field,symbol,def,usc) {&pep.field, sizeof (pep.field), def, symbol, 0, usc} 363 364static definfo init[] = 365{ 366 /* imagebase must be first */ 367#define IMAGEBASEOFF 0 368 D(ImageBase,"__image_base__", NT_EXE_IMAGE_BASE, FALSE), 369#define DLLOFF 1 370 {&dll, sizeof(dll), 0, "__dll__", 0, FALSE}, 371#define MSIMAGEBASEOFF 2 372 D(ImageBase, "___ImageBase", NT_EXE_IMAGE_BASE, TRUE), 373 D(SectionAlignment,"__section_alignment__", PE_DEF_SECTION_ALIGNMENT, FALSE), 374 D(FileAlignment,"__file_alignment__", PE_DEF_FILE_ALIGNMENT, FALSE), 375 D(MajorOperatingSystemVersion,"__major_os_version__", 4, FALSE), 376 D(MinorOperatingSystemVersion,"__minor_os_version__", 0, FALSE), 377 D(MajorImageVersion,"__major_image_version__", 0, FALSE), 378 D(MinorImageVersion,"__minor_image_version__", 0, FALSE), 379 D(MajorSubsystemVersion,"__major_subsystem_version__", 5, FALSE), 380 D(MinorSubsystemVersion,"__minor_subsystem_version__", 2, FALSE), 381 D(Subsystem,"__subsystem__", ${SUBSYSTEM}, FALSE), 382 D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x200000, FALSE), 383 D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000, FALSE), 384 D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000, FALSE), 385 D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000, FALSE), 386 D(LoaderFlags,"__loader_flags__", 0x0, FALSE), 387 D(DllCharacteristics, "__dll_characteristics__", 0x0, FALSE), 388 { NULL, 0, 0, NULL, 0, FALSE} 389}; 390 391 392static void 393gld_${EMULATION_NAME}_list_options (FILE *file) 394{ 395 fprintf (file, _(" --base_file <basefile> Generate a base file for relocatable DLLs\n")); 396 fprintf (file, _(" --dll Set image base to the default for DLLs\n")); 397 fprintf (file, _(" --file-alignment <size> Set file alignment\n")); 398 fprintf (file, _(" --heap <size> Set initial size of the heap\n")); 399 fprintf (file, _(" --image-base <address> Set start address of the executable\n")); 400 fprintf (file, _(" --major-image-version <number> Set version number of the executable\n")); 401 fprintf (file, _(" --major-os-version <number> Set minimum required OS version\n")); 402 fprintf (file, _(" --major-subsystem-version <number> Set minimum required OS subsystem version\n")); 403 fprintf (file, _(" --minor-image-version <number> Set revision number of the executable\n")); 404 fprintf (file, _(" --minor-os-version <number> Set minimum required OS revision\n")); 405 fprintf (file, _(" --minor-subsystem-version <number> Set minimum required OS subsystem revision\n")); 406 fprintf (file, _(" --section-alignment <size> Set section alignment\n")); 407 fprintf (file, _(" --stack <size> Set size of the initial stack\n")); 408 fprintf (file, _(" --subsystem <name>[:<version>] Set required OS subsystem [& version]\n")); 409 fprintf (file, _(" --support-old-code Support interworking with old code\n")); 410 fprintf (file, _(" --[no-]leading-underscore Set explicit symbol underscore prefix mode\n")); 411 fprintf (file, _(" --[no-]insert-timestamp Use a real timestamp rather than zero (default)\n")); 412 fprintf (file, _(" This makes binaries non-deterministic\n")); 413#ifdef DLL_SUPPORT 414 fprintf (file, _(" --add-stdcall-alias Export symbols with and without @nn\n")); 415 fprintf (file, _(" --disable-stdcall-fixup Don't link _sym to _sym@nn\n")); 416 fprintf (file, _(" --enable-stdcall-fixup Link _sym to _sym@nn without warnings\n")); 417 fprintf (file, _(" --exclude-symbols sym,sym,... Exclude symbols from automatic export\n")); 418 fprintf (file, _(" --exclude-all-symbols Exclude all symbols from automatic export\n")); 419 fprintf (file, _(" --exclude-libs lib,lib,... Exclude libraries from automatic export\n")); 420 fprintf (file, _(" --exclude-modules-for-implib mod,mod,...\n")); 421 fprintf (file, _(" Exclude objects, archive members from auto\n")); 422 fprintf (file, _(" export, place into import library instead\n")); 423 fprintf (file, _(" --export-all-symbols Automatically export all globals to DLL\n")); 424 fprintf (file, _(" --kill-at Remove @nn from exported symbols\n")); 425 fprintf (file, _(" --output-def <file> Generate a .DEF file for the built DLL\n")); 426 fprintf (file, _(" --warn-duplicate-exports Warn about duplicate exports\n")); 427 fprintf (file, _(" --compat-implib Create backward compatible import libs;\n\ 428 create __imp_<SYMBOL> as well\n")); 429 fprintf (file, _(" --enable-auto-image-base Automatically choose image base for DLLs\n\ 430 unless user specifies one\n")); 431 fprintf (file, _(" --disable-auto-image-base Do not auto-choose image base (default)\n")); 432 fprintf (file, _(" --dll-search-prefix=<string> When linking dynamically to a dll without\n\ 433 an importlib, use <string><basename>.dll\n\ 434 in preference to lib<basename>.dll \n")); 435 fprintf (file, _(" --enable-auto-import Do sophisticated linking of _sym to\n\ 436 __imp_sym for DATA references\n")); 437 fprintf (file, _(" --disable-auto-import Do not auto-import DATA items from DLLs\n")); 438 fprintf (file, _(" --enable-runtime-pseudo-reloc Work around auto-import limitations by\n\ 439 adding pseudo-relocations resolved at\n\ 440 runtime\n")); 441 fprintf (file, _(" --disable-runtime-pseudo-reloc Do not add runtime pseudo-relocations for\n\ 442 auto-imported DATA\n")); 443 fprintf (file, _(" --enable-extra-pep-debug Enable verbose debug output when building\n\ 444 or linking to DLLs (esp. auto-import)\n")); 445 fprintf (file, _(" --enable-long-section-names Use long COFF section names even in\n\ 446 executable image files\n")); 447 fprintf (file, _(" --disable-long-section-names Never use long COFF section names, even\n\ 448 in object files\n")); 449 fprintf (file, _(" --high-entropy-va Image is compatible with 64-bit address space\n\ 450 layout randomization (ASLR)\n")); 451 fprintf (file, _(" --dynamicbase Image base address may be relocated using\n\ 452 address space layout randomization (ASLR)\n")); 453 fprintf (file, _(" --enable-reloc-section Create the base relocation table\n")); 454 fprintf (file, _(" --forceinteg Code integrity checks are enforced\n")); 455 fprintf (file, _(" --nxcompat Image is compatible with data execution prevention\n")); 456 fprintf (file, _(" --no-isolation Image understands isolation but do not isolate the image\n")); 457 fprintf (file, _(" --no-seh Image does not use SEH; no SE handler may\n\ 458 be called in this image\n")); 459 fprintf (file, _(" --no-bind Do not bind this image\n")); 460 fprintf (file, _(" --wdmdriver Driver uses the WDM model\n")); 461 fprintf (file, _(" --tsaware Image is Terminal Server aware\n")); 462 fprintf (file, _(" --build-id[=STYLE] Generate build ID\n")); 463#endif 464} 465 466 467static void 468set_pep_name (char *name, bfd_vma val) 469{ 470 int i; 471 is_underscoring (); 472 /* Find the name and set it. */ 473 for (i = 0; init[i].ptr; i++) 474 { 475 if (strcmp (name, GET_INIT_SYMBOL_NAME (i)) == 0) 476 { 477 init[i].value = val; 478 init[i].inited = 1; 479 if (strcmp (name,"__image_base__") == 0) 480 set_pep_name (U ("__ImageBase"), val); 481 return; 482 } 483 } 484 abort (); 485} 486 487static void 488set_entry_point (void) 489{ 490 const char *entry; 491 const char *initial_symbol_char; 492 int i; 493 494 static const struct 495 { 496 const int value; 497 const char *entry; 498 } 499 v[] = 500 { 501 { 1, "NtProcessStartup" }, 502 { 2, "WinMainCRTStartup" }, 503 { 3, "mainCRTStartup" }, 504 { 7, "__PosixProcessStartup" }, 505 { 9, "WinMainCRTStartup" }, 506 {14, "mainCRTStartup" }, 507 { 0, NULL } 508 }; 509 510 /* Entry point name for arbitrary subsystem numbers. */ 511 static const char default_entry[] = "mainCRTStartup"; 512 513 if (bfd_link_pic (&link_info) || dll) 514 { 515 entry = "DllMainCRTStartup"; 516 } 517 else 518 { 519 for (i = 0; v[i].entry; i++) 520 if (v[i].value == pep_subsystem) 521 break; 522 523 /* If no match, use the default. */ 524 if (v[i].entry != NULL) 525 entry = v[i].entry; 526 else 527 entry = default_entry; 528 } 529 530 /* Now we check target's default for getting proper symbol_char. */ 531 initial_symbol_char = (is_underscoring () != 0 ? "_" : ""); 532 533 if (*initial_symbol_char != '\0') 534 { 535 char *alc_entry; 536 537 /* lang_default_entry expects its argument to be permanently 538 allocated, so we don't free this string. */ 539 alc_entry = xmalloc (strlen (initial_symbol_char) 540 + strlen (entry) 541 + 1); 542 strcpy (alc_entry, initial_symbol_char); 543 strcat (alc_entry, entry); 544 entry = alc_entry; 545 } 546 547 lang_default_entry (entry); 548} 549 550static void 551set_pep_subsystem (void) 552{ 553 const char *sver; 554 char *end; 555 int len; 556 int i; 557 unsigned long temp_subsystem; 558 static const struct 559 { 560 const char *name; 561 const int value; 562 } 563 v[] = 564 { 565 { "native", 1 }, 566 { "windows", 2 }, 567 { "console", 3 }, 568 { "posix", 7 }, 569 { "wince", 9 }, 570 { "xbox", 14 }, 571 { NULL, 0 } 572 }; 573 574 /* Check for the presence of a version number. */ 575 sver = strchr (optarg, ':'); 576 if (sver == NULL) 577 len = strlen (optarg); 578 else 579 { 580 len = sver - optarg; 581 set_pep_name ("__major_subsystem_version__", 582 strtoul (sver + 1, &end, 0)); 583 if (*end == '.') 584 set_pep_name ("__minor_subsystem_version__", 585 strtoul (end + 1, &end, 0)); 586 if (*end != '\0') 587 einfo (_("%P: warning: bad version number in -subsystem option\n")); 588 } 589 590 /* Check for numeric subsystem. */ 591 temp_subsystem = strtoul (optarg, & end, 0); 592 if ((*end == ':' || *end == '\0') && (temp_subsystem < 65536)) 593 { 594 /* Search list for a numeric match to use its entry point. */ 595 for (i = 0; v[i].name; i++) 596 if (v[i].value == (int) temp_subsystem) 597 break; 598 599 /* Use this subsystem. */ 600 pep_subsystem = (int) temp_subsystem; 601 } 602 else 603 { 604 /* Search for subsystem by name. */ 605 for (i = 0; v[i].name; i++) 606 if (strncmp (optarg, v[i].name, len) == 0 607 && v[i].name[len] == '\0') 608 break; 609 610 if (v[i].name == NULL) 611 { 612 einfo (_("%F%P: invalid subsystem type %s\n"), optarg); 613 return; 614 } 615 616 pep_subsystem = v[i].value; 617 } 618 619 set_pep_name ("__subsystem__", pep_subsystem); 620 621 return; 622} 623 624 625static void 626set_pep_value (char *name) 627{ 628 char *end; 629 630 set_pep_name (name, (bfd_vma) strtoull (optarg, &end, 0)); 631 632 if (end == optarg) 633 einfo (_("%F%P: invalid hex number for PE parameter '%s'\n"), optarg); 634 635 optarg = end; 636} 637 638 639static void 640set_pep_stack_heap (char *resname, char *comname) 641{ 642 set_pep_value (resname); 643 644 if (*optarg == ',') 645 { 646 optarg++; 647 set_pep_value (comname); 648 } 649 else if (*optarg) 650 einfo (_("%F%P: strange hex info for PE parameter '%s'\n"), optarg); 651} 652 653#define DEFAULT_BUILD_ID_STYLE "md5" 654 655static bfd_boolean 656gld${EMULATION_NAME}_handle_option (int optc) 657{ 658 is_underscoring (); 659 switch (optc) 660 { 661 default: 662 return FALSE; 663 664 case OPTION_BASE_FILE: 665 link_info.base_file = fopen (optarg, FOPEN_WB); 666 if (link_info.base_file == NULL) 667 einfo (_("%F%P: cannot open base file %s\n"), optarg); 668 break; 669 670 /* PE options. */ 671 case OPTION_HEAP: 672 set_pep_stack_heap ("__size_of_heap_reserve__", "__size_of_heap_commit__"); 673 break; 674 case OPTION_STACK: 675 set_pep_stack_heap ("__size_of_stack_reserve__", "__size_of_stack_commit__"); 676 break; 677 case OPTION_SUBSYSTEM: 678 set_pep_subsystem (); 679 break; 680 case OPTION_MAJOR_OS_VERSION: 681 set_pep_value ("__major_os_version__"); 682 break; 683 case OPTION_MINOR_OS_VERSION: 684 set_pep_value ("__minor_os_version__"); 685 break; 686 case OPTION_MAJOR_SUBSYSTEM_VERSION: 687 set_pep_value ("__major_subsystem_version__"); 688 break; 689 case OPTION_MINOR_SUBSYSTEM_VERSION: 690 set_pep_value ("__minor_subsystem_version__"); 691 break; 692 case OPTION_MAJOR_IMAGE_VERSION: 693 set_pep_value ("__major_image_version__"); 694 break; 695 case OPTION_MINOR_IMAGE_VERSION: 696 set_pep_value ("__minor_image_version__"); 697 break; 698 case OPTION_FILE_ALIGNMENT: 699 set_pep_value ("__file_alignment__"); 700 break; 701 case OPTION_SECTION_ALIGNMENT: 702 set_pep_value ("__section_alignment__"); 703 break; 704 case OPTION_DLL: 705 set_pep_name ("__dll__", 1); 706 break; 707 case OPTION_IMAGE_BASE: 708 set_pep_value ("__image_base__"); 709 break; 710 case OPTION_SUPPORT_OLD_CODE: 711 support_old_code = 1; 712 break; 713 case OPTION_USE_NUL_PREFIXED_IMPORT_TABLES: 714 pep_use_nul_prefixed_import_tables = TRUE; 715 break; 716 case OPTION_NO_LEADING_UNDERSCORE: 717 pep_leading_underscore = 0; 718 break; 719 case OPTION_LEADING_UNDERSCORE: 720 pep_leading_underscore = 1; 721 break; 722 case OPTION_INSERT_TIMESTAMP: 723 insert_timestamp = TRUE; 724 break; 725 case OPTION_NO_INSERT_TIMESTAMP: 726 insert_timestamp = FALSE; 727 break; 728#ifdef DLL_SUPPORT 729 case OPTION_OUT_DEF: 730 pep_out_def_filename = xstrdup (optarg); 731 break; 732 case OPTION_EXPORT_ALL: 733 pep_dll_export_everything = 1; 734 break; 735 case OPTION_EXCLUDE_SYMBOLS: 736 pep_dll_add_excludes (optarg, EXCLUDESYMS); 737 break; 738 case OPTION_EXCLUDE_ALL_SYMBOLS: 739 pep_dll_exclude_all_symbols = 1; 740 break; 741 case OPTION_EXCLUDE_LIBS: 742 pep_dll_add_excludes (optarg, EXCLUDELIBS); 743 break; 744 case OPTION_EXCLUDE_MODULES_FOR_IMPLIB: 745 pep_dll_add_excludes (optarg, EXCLUDEFORIMPLIB); 746 break; 747 case OPTION_KILL_ATS: 748 pep_dll_kill_ats = 1; 749 break; 750 case OPTION_STDCALL_ALIASES: 751 pep_dll_stdcall_aliases = 1; 752 break; 753 case OPTION_ENABLE_STDCALL_FIXUP: 754 pep_enable_stdcall_fixup = 1; 755 break; 756 case OPTION_DISABLE_STDCALL_FIXUP: 757 pep_enable_stdcall_fixup = 0; 758 break; 759 case OPTION_WARN_DUPLICATE_EXPORTS: 760 pep_dll_warn_dup_exports = 1; 761 break; 762 case OPTION_IMP_COMPAT: 763 pep_dll_compat_implib = 1; 764 break; 765 case OPTION_ENABLE_AUTO_IMAGE_BASE: 766 pep_enable_auto_image_base = 1; 767 break; 768 case OPTION_DISABLE_AUTO_IMAGE_BASE: 769 pep_enable_auto_image_base = 0; 770 break; 771 case OPTION_DLL_SEARCH_PREFIX: 772 pep_dll_search_prefix = xstrdup (optarg); 773 break; 774 case OPTION_NO_DEFAULT_EXCLUDES: 775 pep_dll_do_default_excludes = 0; 776 break; 777 case OPTION_DLL_ENABLE_AUTO_IMPORT: 778 link_info.pei386_auto_import = 1; 779 break; 780 case OPTION_DLL_DISABLE_AUTO_IMPORT: 781 link_info.pei386_auto_import = 0; 782 break; 783 case OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC: 784 link_info.pei386_runtime_pseudo_reloc = 2; 785 break; 786 case OPTION_DLL_DISABLE_RUNTIME_PSEUDO_RELOC: 787 link_info.pei386_runtime_pseudo_reloc = 0; 788 break; 789 case OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V2: 790 link_info.pei386_runtime_pseudo_reloc = 2; 791 break; 792 case OPTION_ENABLE_EXTRA_PE_DEBUG: 793 pep_dll_extra_pe_debug = 1; 794 break; 795#endif 796 case OPTION_ENABLE_LONG_SECTION_NAMES: 797 pep_use_coff_long_section_names = 1; 798 break; 799 case OPTION_DISABLE_LONG_SECTION_NAMES: 800 pep_use_coff_long_section_names = 0; 801 break; 802 /* Get DLLCharacteristics bits */ 803 case OPTION_HIGH_ENTROPY_VA: 804 pe_dll_characteristics |= IMAGE_DLL_CHARACTERISTICS_HIGH_ENTROPY_VA; 805 /* fall through */ 806 case OPTION_DYNAMIC_BASE: 807 pe_dll_characteristics |= IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE; 808 /* fall through */ 809 case OPTION_ENABLE_RELOC_SECTION: 810 pep_dll_enable_reloc_section = 1; 811 break; 812 case OPTION_FORCE_INTEGRITY: 813 pe_dll_characteristics |= IMAGE_DLL_CHARACTERISTICS_FORCE_INTEGRITY; 814 break; 815 case OPTION_NX_COMPAT: 816 pe_dll_characteristics |= IMAGE_DLL_CHARACTERISTICS_NX_COMPAT; 817 break; 818 case OPTION_NO_ISOLATION: 819 pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_NO_ISOLATION; 820 break; 821 case OPTION_NO_SEH: 822 pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_NO_SEH; 823 break; 824 case OPTION_NO_BIND: 825 pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_NO_BIND; 826 break; 827 case OPTION_WDM_DRIVER: 828 pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_WDM_DRIVER; 829 break; 830 case OPTION_TERMINAL_SERVER_AWARE: 831 pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE; 832 break; 833 case OPTION_BUILD_ID: 834 if (emit_build_id != NULL) 835 { 836 free ((char *) emit_build_id); 837 emit_build_id = NULL; 838 } 839 if (optarg == NULL) 840 optarg = DEFAULT_BUILD_ID_STYLE; 841 if (strcmp (optarg, "none")) 842 emit_build_id = xstrdup (optarg); 843 break; 844 } 845 846 /* Set DLLCharacteristics bits */ 847 set_pep_name ("__dll_characteristics__", pe_dll_characteristics); 848 849 return TRUE; 850} 851 852 853#ifdef DLL_SUPPORT 854static unsigned long 855strhash (const char *str) 856{ 857 const unsigned char *s; 858 unsigned long hash; 859 unsigned int c; 860 unsigned int len; 861 862 hash = 0; 863 len = 0; 864 s = (const unsigned char *) str; 865 while ((c = *s++) != '\0') 866 { 867 hash += c + (c << 17); 868 hash ^= hash >> 2; 869 ++len; 870 } 871 hash += len + (len << 17); 872 hash ^= hash >> 2; 873 874 return hash; 875} 876 877/* Use the output file to create a image base for relocatable DLLs. */ 878 879static bfd_vma 880compute_dll_image_base (const char *ofile) 881{ 882 bfd_vma hash = (bfd_vma) strhash (ofile); 883 return NT_DLL_AUTO_IMAGE_BASE + ((hash << 16) & NT_DLL_AUTO_IMAGE_MASK); 884} 885#endif 886 887/* Assign values to the special symbols before the linker script is 888 read. */ 889 890static void 891gld_${EMULATION_NAME}_set_symbols (void) 892{ 893 /* Run through and invent symbols for all the 894 names and insert the defaults. */ 895 int j; 896 897 is_underscoring (); 898 899 if (!init[IMAGEBASEOFF].inited) 900 { 901 if (bfd_link_relocatable (&link_info)) 902 init[IMAGEBASEOFF].value = 0; 903 else if (init[DLLOFF].value || bfd_link_dll (&link_info)) 904 { 905#ifdef DLL_SUPPORT 906 init[IMAGEBASEOFF].value = (pep_enable_auto_image_base 907 ? compute_dll_image_base (output_filename) 908 : NT_DLL_IMAGE_BASE); 909#else 910 init[IMAGEBASEOFF].value = NT_DLL_IMAGE_BASE; 911#endif 912 } 913 else 914 init[IMAGEBASEOFF].value = NT_EXE_IMAGE_BASE; 915 init[MSIMAGEBASEOFF].value = init[IMAGEBASEOFF].value; 916 } 917 918 /* Don't do any symbol assignments if this is a relocatable link. */ 919 if (bfd_link_relocatable (&link_info)) 920 return; 921 922 /* Glue the assignments into the abs section. */ 923 push_stat_ptr (&abs_output_section->children); 924 925 for (j = 0; init[j].ptr; j++) 926 { 927 bfd_vma val = init[j].value; 928 lang_assignment_statement_type *rv; 929 930 rv = lang_add_assignment (exp_assign (GET_INIT_SYMBOL_NAME (j), 931 exp_intop (val), FALSE)); 932 if (init[j].size == sizeof (short)) 933 *(short *) init[j].ptr = (short) val; 934 else if (init[j].size == sizeof (int)) 935 *(int *) init[j].ptr = (int) val; 936 else if (init[j].size == sizeof (long)) 937 *(long *) init[j].ptr = (long) val; 938 /* This might be a long long or other special type. */ 939 else if (init[j].size == sizeof (bfd_vma)) 940 *(bfd_vma *) init[j].ptr = val; 941 else abort (); 942 if (j == IMAGEBASEOFF) 943 image_base_statement = rv; 944 } 945 /* Restore the pointer. */ 946 pop_stat_ptr (); 947 948 if (pep.FileAlignment > pep.SectionAlignment) 949 { 950 einfo (_("%P: warning, file alignment > section alignment\n")); 951 } 952} 953 954/* This is called after the linker script and the command line options 955 have been read. */ 956 957static void 958gld_${EMULATION_NAME}_after_parse (void) 959{ 960 /* PR ld/6744: Warn the user if they have used an ELF-only 961 option hoping it will work on PE+. */ 962 if (link_info.export_dynamic) 963 einfo (_("%P: warning: --export-dynamic is not supported for PE+ " 964 "targets, did you mean --export-all-symbols?\n")); 965 966 set_entry_point (); 967 968 after_parse_default (); 969} 970 971#ifdef DLL_SUPPORT 972static struct bfd_link_hash_entry *pep_undef_found_sym; 973 974static bfd_boolean 975pep_undef_cdecl_match (struct bfd_link_hash_entry *h, void *inf) 976{ 977 int sl; 978 char *string = inf; 979 const char *hs = h->root.string; 980 981 sl = strlen (string); 982 if (h->type == bfd_link_hash_defined 983 && ((*hs == '@' && *string == '_' 984 && strncmp (hs + 1, string + 1, sl - 1) == 0) 985 || strncmp (hs, string, sl) == 0) 986 && h->root.string[sl] == '@') 987 { 988 pep_undef_found_sym = h; 989 return FALSE; 990 } 991 return TRUE; 992} 993 994static void 995pep_fixup_stdcalls (void) 996{ 997 static int gave_warning_message = 0; 998 struct bfd_link_hash_entry *undef, *sym; 999 1000 if (pep_dll_extra_pe_debug) 1001 printf ("%s\n", __FUNCTION__); 1002 1003 for (undef = link_info.hash->undefs; undef; undef=undef->u.undef.next) 1004 if (undef->type == bfd_link_hash_undefined) 1005 { 1006 char* at = strchr (undef->root.string, '@'); 1007 int lead_at = (*undef->root.string == '@'); 1008 if (lead_at) 1009 at = strchr (undef->root.string + 1, '@'); 1010 if (at || lead_at) 1011 { 1012 /* The symbol is a stdcall symbol, so let's look for a 1013 cdecl symbol with the same name and resolve to that. */ 1014 char *cname = xstrdup (undef->root.string); 1015 1016 if (lead_at) 1017 *cname = '_'; 1018 at = strchr (cname, '@'); 1019 if (at) 1020 *at = 0; 1021 sym = bfd_link_hash_lookup (link_info.hash, cname, 0, 0, 1); 1022 1023 if (sym && sym->type == bfd_link_hash_defined) 1024 { 1025 undef->type = bfd_link_hash_defined; 1026 undef->u.def.value = sym->u.def.value; 1027 undef->u.def.section = sym->u.def.section; 1028 1029 if (pep_enable_stdcall_fixup == -1) 1030 { 1031 einfo (_("warning: resolving %s by linking to %s\n"), 1032 undef->root.string, cname); 1033 if (! gave_warning_message) 1034 { 1035 gave_warning_message = 1; 1036 einfo (_("Use --enable-stdcall-fixup to disable these warnings\n")); 1037 einfo (_("Use --disable-stdcall-fixup to disable these fixups\n")); 1038 } 1039 } 1040 } 1041 } 1042 else 1043 { 1044 /* The symbol is a cdecl symbol, so we look for stdcall 1045 symbols - which means scanning the whole symbol table. */ 1046 pep_undef_found_sym = 0; 1047 bfd_link_hash_traverse (link_info.hash, pep_undef_cdecl_match, 1048 (char *) undef->root.string); 1049 sym = pep_undef_found_sym; 1050 if (sym) 1051 { 1052 undef->type = bfd_link_hash_defined; 1053 undef->u.def.value = sym->u.def.value; 1054 undef->u.def.section = sym->u.def.section; 1055 1056 if (pep_enable_stdcall_fixup == -1) 1057 { 1058 einfo (_("warning: resolving %s by linking to %s\n"), 1059 undef->root.string, sym->root.string); 1060 if (! gave_warning_message) 1061 { 1062 gave_warning_message = 1; 1063 einfo (_("Use --enable-stdcall-fixup to disable these warnings\n")); 1064 einfo (_("Use --disable-stdcall-fixup to disable these fixups\n")); 1065 } 1066 } 1067 } 1068 } 1069 } 1070} 1071 1072static void 1073make_import_fixup (arelent *rel, asection *s, char *name, const char *symname) 1074{ 1075 struct bfd_symbol *sym = *rel->sym_ptr_ptr; 1076 char addend[8]; 1077 bfd_vma _addend = 0; 1078 int suc = 0; 1079 1080 if (pep_dll_extra_pe_debug) 1081 printf ("arelent: %s@%#lx: add=%li\n", sym->name, 1082 (unsigned long) rel->address, (long) rel->addend); 1083 1084 memset (addend, 0, sizeof (addend)); 1085 switch ((rel->howto->bitsize)) 1086 { 1087 case 8: 1088 suc = bfd_get_section_contents (s->owner, s, addend, rel->address, 1); 1089 if (suc && rel->howto->pc_relative) 1090 _addend = bfd_get_signed_8 (s->owner, addend); 1091 else if (suc) 1092 _addend = bfd_get_8 (s->owner, addend); 1093 break; 1094 case 16: 1095 suc = bfd_get_section_contents (s->owner, s, addend, rel->address, 2); 1096 if (suc && rel->howto->pc_relative) 1097 _addend = bfd_get_signed_16 (s->owner, addend); 1098 else if (suc) 1099 _addend = bfd_get_16 (s->owner, addend); 1100 break; 1101 case 32: 1102 suc = bfd_get_section_contents (s->owner, s, addend, rel->address, 4); 1103 if (suc && rel->howto->pc_relative) 1104 _addend = bfd_get_signed_32 (s->owner, addend); 1105 else if (suc) 1106 _addend = bfd_get_32 (s->owner, addend); 1107 break; 1108 case 64: 1109 suc = bfd_get_section_contents (s->owner, s, addend, rel->address, 8); 1110 if (suc) 1111 _addend = bfd_get_64 (s->owner, addend); 1112 break; 1113 } 1114 if (! suc) 1115 einfo (_("%P: %C: cannot get section contents - auto-import exception\n"), 1116 s->owner, s, rel->address); 1117 1118 if (pep_dll_extra_pe_debug) 1119 { 1120 printf ("import of 0x%lx(0x%lx) sec_addr=0x%lx", 1121 (long) _addend, (long) rel->addend, (long) rel->address); 1122 if (rel->howto->pc_relative) 1123 printf (" pcrel"); 1124 printf (" %d bit rel.\n", (int) rel->howto->bitsize); 1125 } 1126 1127 pep_create_import_fixup (rel, s, _addend, name, symname); 1128} 1129 1130static bfd_boolean 1131pr_sym (struct bfd_hash_entry *h, void *inf ATTRIBUTE_UNUSED) 1132{ 1133 printf ("+%s\n", h->string); 1134 1135 return TRUE; 1136} 1137#endif /* DLL_SUPPORT */ 1138 1139static void 1140debug_section_p (bfd *abfd ATTRIBUTE_UNUSED, asection *sect, void *obj) 1141{ 1142 int *found = (int *) obj; 1143 1144 if (strncmp (".debug_", sect->name, sizeof (".debug_") - 1) == 0) 1145 *found = 1; 1146} 1147 1148static bfd_boolean 1149pecoff_checksum_contents (bfd *abfd, 1150 void (*process) (const void *, size_t, void *), 1151 void *arg) 1152{ 1153 file_ptr filepos = (file_ptr) 0; 1154 1155 while (1) 1156 { 1157 unsigned char b; 1158 int status; 1159 1160 if (bfd_seek (abfd, filepos, SEEK_SET) != 0) 1161 return 0; 1162 1163 status = bfd_bread (&b, (bfd_size_type) 1, abfd); 1164 if (status < 1) 1165 { 1166 break; 1167 } 1168 1169 (*process) (&b, 1, arg); 1170 filepos += 1; 1171 } 1172 1173 return TRUE; 1174} 1175 1176static bfd_boolean 1177write_build_id (bfd *abfd) 1178{ 1179 struct pe_tdata *t = pe_data (abfd); 1180 asection *asec; 1181 struct bfd_link_order *link_order = NULL; 1182 unsigned char *contents; 1183 bfd_size_type size; 1184 bfd_size_type build_id_size; 1185 unsigned char *build_id; 1186 1187 /* Find the section the .buildid output section has been merged info. */ 1188 for (asec = abfd->sections; asec != NULL; asec = asec->next) 1189 { 1190 struct bfd_link_order *l = NULL; 1191 for (l = asec->map_head.link_order; l != NULL; l = l->next) 1192 { 1193 if (l->type == bfd_indirect_link_order) 1194 { 1195 if (l->u.indirect.section == t->build_id.sec) 1196 { 1197 link_order = l; 1198 break; 1199 } 1200 } 1201 } 1202 1203 if (link_order) 1204 break; 1205 } 1206 1207 if (!link_order) 1208 { 1209 einfo (_("%P: warning: .buildid section discarded," 1210 " --build-id ignored\n")); 1211 return TRUE; 1212 } 1213 1214 if (t->build_id.sec->contents == NULL) 1215 t->build_id.sec->contents = (unsigned char *) xmalloc (t->build_id.sec->size); 1216 contents = t->build_id.sec->contents; 1217 size = t->build_id.sec->size; 1218 1219 build_id_size = compute_build_id_size (t->build_id.style); 1220 build_id = xmalloc (build_id_size); 1221 generate_build_id (abfd, t->build_id.style, pecoff_checksum_contents, build_id, build_id_size); 1222 1223 bfd_vma ib = pe_data (link_info.output_bfd)->pe_opthdr.ImageBase; 1224 1225 /* Construct a debug directory entry which points to an immediately following CodeView record. */ 1226 struct internal_IMAGE_DEBUG_DIRECTORY idd; 1227 idd.Characteristics = 0; 1228 idd.TimeDateStamp = 0; 1229 idd.MajorVersion = 0; 1230 idd.MinorVersion = 0; 1231 idd.Type = PE_IMAGE_DEBUG_TYPE_CODEVIEW; 1232 idd.SizeOfData = sizeof (CV_INFO_PDB70) + 1; 1233 idd.AddressOfRawData = asec->vma - ib + link_order->offset 1234 + sizeof (struct external_IMAGE_DEBUG_DIRECTORY); 1235 idd.PointerToRawData = asec->filepos + link_order->offset 1236 + sizeof (struct external_IMAGE_DEBUG_DIRECTORY); 1237 1238 struct external_IMAGE_DEBUG_DIRECTORY *ext = (struct external_IMAGE_DEBUG_DIRECTORY *)contents; 1239 _bfd_XXi_swap_debugdir_out (abfd, &idd, ext); 1240 1241 /* Write the debug directory enttry */ 1242 if (bfd_seek (abfd, asec->filepos + link_order->offset, SEEK_SET) != 0) 1243 return 0; 1244 1245 if (bfd_bwrite (contents, size, abfd) != size) 1246 return 0; 1247 1248 /* Construct the CodeView record. */ 1249 CODEVIEW_INFO cvinfo; 1250 cvinfo.CVSignature = CVINFO_PDB70_CVSIGNATURE; 1251 cvinfo.Age = 1; 1252 1253 /* Zero pad or truncate the generated build_id to fit in the CodeView record. */ 1254 memset (&(cvinfo.Signature), 0, CV_INFO_SIGNATURE_LENGTH); 1255 memcpy (&(cvinfo.Signature), build_id, (build_id_size > CV_INFO_SIGNATURE_LENGTH) 1256 ? CV_INFO_SIGNATURE_LENGTH : build_id_size); 1257 1258 free (build_id); 1259 1260 /* Write the codeview record. */ 1261 if (_bfd_XXi_write_codeview_record (abfd, idd.PointerToRawData, &cvinfo) == 0) 1262 return 0; 1263 1264 /* Record the location of the debug directory in the data directory. */ 1265 pe_data (link_info.output_bfd)->pe_opthdr.DataDirectory[PE_DEBUG_DATA].VirtualAddress 1266 = asec->vma - ib + link_order->offset; 1267 pe_data (link_info.output_bfd)->pe_opthdr.DataDirectory[PE_DEBUG_DATA].Size 1268 = sizeof (struct external_IMAGE_DEBUG_DIRECTORY); 1269 1270 return TRUE; 1271} 1272 1273/* Make .buildid section, and set up coff_tdata->build_id. */ 1274static bfd_boolean 1275setup_build_id (bfd *ibfd) 1276{ 1277 asection *s; 1278 flagword flags; 1279 1280 if (!validate_build_id_style (emit_build_id)) 1281 { 1282 einfo (_("%P: warning: unrecognized --build-id style ignored\n")); 1283 return FALSE; 1284 } 1285 1286 flags = (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY 1287 | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA); 1288 s = bfd_make_section_anyway_with_flags (ibfd, ".buildid", flags); 1289 if (s != NULL) 1290 { 1291 struct pe_tdata *t = pe_data (link_info.output_bfd); 1292 t->build_id.after_write_object_contents = &write_build_id; 1293 t->build_id.style = emit_build_id; 1294 t->build_id.sec = s; 1295 1296 /* Section is a fixed size: 1297 One IMAGE_DEBUG_DIRECTORY entry, of type IMAGE_DEBUG_TYPE_CODEVIEW, 1298 pointing at a CV_INFO_PDB70 record containing the build-id, with a 1299 null byte for PdbFileName. */ 1300 s->size = sizeof (struct external_IMAGE_DEBUG_DIRECTORY) 1301 + sizeof (CV_INFO_PDB70) + 1; 1302 1303 return TRUE; 1304 } 1305 1306 einfo (_("%P: warning: cannot create .buildid section," 1307 " --build-id ignored\n")); 1308 return FALSE; 1309} 1310 1311static void 1312gld_${EMULATION_NAME}_after_open (void) 1313{ 1314 after_open_default (); 1315 1316 is_underscoring (); 1317#ifdef DLL_SUPPORT 1318 if (pep_dll_extra_pe_debug) 1319 { 1320 bfd *a; 1321 struct bfd_link_hash_entry *sym; 1322 1323 printf ("%s()\n", __FUNCTION__); 1324 1325 for (sym = link_info.hash->undefs; sym; sym=sym->u.undef.next) 1326 printf ("-%s\n", sym->root.string); 1327 bfd_hash_traverse (&link_info.hash->table, pr_sym, NULL); 1328 1329 for (a = link_info.input_bfds; a; a = a->link.next) 1330 printf ("*%s\n",a->filename); 1331 } 1332#endif 1333 1334 if (emit_build_id != NULL) 1335 { 1336 bfd *abfd; 1337 1338 /* Find a COFF input. */ 1339 for (abfd = link_info.input_bfds; 1340 abfd != (bfd *) NULL; abfd = abfd->link.next) 1341 if (bfd_get_flavour (abfd) == bfd_target_coff_flavour) 1342 break; 1343 1344 /* If there are no COFF input files do not try to 1345 add a build-id section. */ 1346 if (abfd == NULL 1347 || !setup_build_id (abfd)) 1348 { 1349 free ((char *) emit_build_id); 1350 emit_build_id = NULL; 1351 } 1352 } 1353 1354 /* Pass the wacky PE command line options into the output bfd. 1355 FIXME: This should be done via a function, rather than by 1356 including an internal BFD header. */ 1357 1358 if (bfd_get_flavour (link_info.output_bfd) != bfd_target_coff_flavour 1359 || coff_data (link_info.output_bfd) == NULL 1360 || coff_data (link_info.output_bfd)->pe == 0) 1361 einfo (_("%F%P: cannot perform PE operations on non PE output file '%pB'\n"), 1362 link_info.output_bfd); 1363 1364 pe_data (link_info.output_bfd)->pe_opthdr = pep; 1365 pe_data (link_info.output_bfd)->dll = init[DLLOFF].value; 1366 pe_data (link_info.output_bfd)->real_flags |= real_flags; 1367 pe_data (link_info.output_bfd)->insert_timestamp = insert_timestamp; 1368 1369 /* At this point we must decide whether to use long section names 1370 in the output or not. If the user hasn't explicitly specified 1371 on the command line, we leave it to the default for the format 1372 (object files yes, image files no), except if there is debug 1373 information present; GDB relies on the long section names to 1374 find it, so enable it in that case. */ 1375 if (pep_use_coff_long_section_names < 0 && link_info.strip == strip_none) 1376 { 1377 if (bfd_link_relocatable (&link_info)) 1378 pep_use_coff_long_section_names = 1; 1379 else 1380 { 1381 /* Iterate over all sections of all input BFDs, checking 1382 for any that begin 'debug_' and are long names. */ 1383 LANG_FOR_EACH_INPUT_STATEMENT (is) 1384 { 1385 int found_debug = 0; 1386 1387 bfd_map_over_sections (is->the_bfd, debug_section_p, &found_debug); 1388 if (found_debug) 1389 { 1390 pep_use_coff_long_section_names = 1; 1391 break; 1392 } 1393 } 1394 } 1395 } 1396 1397 pep_output_file_set_long_section_names (link_info.output_bfd); 1398 1399#ifdef DLL_SUPPORT 1400 pep_process_import_defs (link_info.output_bfd, &link_info); 1401 1402 if (link_info.pei386_auto_import) /* -1=warn or 1=enable */ 1403 pep_find_data_imports (U ("_head_"), make_import_fixup); 1404 1405 /* The implementation of the feature is rather dumb and would cause the 1406 compilation time to go through the roof if there are many undefined 1407 symbols in the link, so it needs to be run after auto-import. */ 1408 if (pep_enable_stdcall_fixup) /* -1=warn or 1=enable */ 1409 pep_fixup_stdcalls (); 1410 1411#ifndef TARGET_IS_i386pep 1412 if (bfd_link_pic (&link_info)) 1413#else 1414 if (!bfd_link_relocatable (&link_info)) 1415#endif 1416 pep_dll_build_sections (link_info.output_bfd, &link_info); 1417 1418#ifndef TARGET_IS_i386pep 1419 else 1420 pep_exe_build_sections (link_info.output_bfd, &link_info); 1421#endif 1422#endif /* DLL_SUPPORT */ 1423 1424 { 1425 /* This next chunk of code tries to detect the case where you have 1426 two import libraries for the same DLL (specifically, 1427 symbolically linking libm.a and libc.a in cygwin to 1428 libcygwin.a). In those cases, it's possible for function 1429 thunks from the second implib to be used but without the 1430 head/tail objects, causing an improper import table. We detect 1431 those cases and rename the "other" import libraries to match 1432 the one the head/tail come from, so that the linker will sort 1433 things nicely and produce a valid import table. */ 1434 1435 LANG_FOR_EACH_INPUT_STATEMENT (is) 1436 { 1437 if (is->the_bfd->my_archive) 1438 { 1439 int idata2 = 0, reloc_count=0, is_imp = 0; 1440 asection *sec; 1441 1442 /* See if this is an import library thunk. */ 1443 for (sec = is->the_bfd->sections; sec; sec = sec->next) 1444 { 1445 if (strcmp (sec->name, ".idata\$2") == 0) 1446 idata2 = 1; 1447 if (CONST_STRNEQ (sec->name, ".idata\$")) 1448 is_imp = 1; 1449 reloc_count += sec->reloc_count; 1450 } 1451 1452 if (is_imp && !idata2 && reloc_count) 1453 { 1454 /* It is, look for the reference to head and see if it's 1455 from our own library. */ 1456 for (sec = is->the_bfd->sections; sec; sec = sec->next) 1457 { 1458 int i; 1459 long relsize; 1460 asymbol **symbols; 1461 arelent **relocs; 1462 int nrelocs; 1463 1464 relsize = bfd_get_reloc_upper_bound (is->the_bfd, sec); 1465 if (relsize < 1) 1466 break; 1467 1468 if (!bfd_generic_link_read_symbols (is->the_bfd)) 1469 { 1470 einfo (_("%F%P: %pB: could not read symbols: %E\n"), 1471 is->the_bfd); 1472 return; 1473 } 1474 symbols = bfd_get_outsymbols (is->the_bfd); 1475 1476 relocs = xmalloc ((size_t) relsize); 1477 nrelocs = bfd_canonicalize_reloc (is->the_bfd, sec, 1478 relocs, symbols); 1479 if (nrelocs < 0) 1480 { 1481 free (relocs); 1482 einfo (_("%X%P: unable to process relocs: %E\n")); 1483 return; 1484 } 1485 1486 for (i = 0; i < nrelocs; i++) 1487 { 1488 struct bfd_symbol *s; 1489 struct bfd_link_hash_entry * blhe; 1490 const char *other_bfd_filename; 1491 char *n; 1492 1493 s = (relocs[i]->sym_ptr_ptr)[0]; 1494 1495 if (s->flags & BSF_LOCAL) 1496 continue; 1497 1498 /* Thunk section with reloc to another bfd. */ 1499 blhe = bfd_link_hash_lookup (link_info.hash, 1500 s->name, 1501 FALSE, FALSE, TRUE); 1502 1503 if (blhe == NULL 1504 || blhe->type != bfd_link_hash_defined) 1505 continue; 1506 1507 other_bfd_filename 1508 = blhe->u.def.section->owner->my_archive 1509 ? bfd_get_filename (blhe->u.def.section->owner->my_archive) 1510 : bfd_get_filename (blhe->u.def.section->owner); 1511 1512 if (filename_cmp (bfd_get_filename 1513 (is->the_bfd->my_archive), 1514 other_bfd_filename) == 0) 1515 continue; 1516 1517 /* Rename this implib to match the other one. */ 1518 n = xmalloc (strlen (other_bfd_filename) + 1); 1519 strcpy (n, other_bfd_filename); 1520 bfd_set_filename (is->the_bfd->my_archive, n); 1521 } 1522 1523 free (relocs); 1524 /* Note - we do not free the symbols, 1525 they are now cached in the BFD. */ 1526 } 1527 } 1528 } 1529 } 1530 } 1531 1532 { 1533 int is_ms_arch = 0; 1534 bfd *cur_arch = 0; 1535 lang_input_statement_type *is2; 1536 lang_input_statement_type *is3; 1537 1538 /* Careful - this is a shell script. Watch those dollar signs! */ 1539 /* Microsoft import libraries have every member named the same, 1540 and not in the right order for us to link them correctly. We 1541 must detect these and rename the members so that they'll link 1542 correctly. There are three types of objects: the head, the 1543 thunks, and the sentinel(s). The head is easy; it's the one 1544 with idata2. We assume that the sentinels won't have relocs, 1545 and the thunks will. It's easier than checking the symbol 1546 table for external references. */ 1547 LANG_FOR_EACH_INPUT_STATEMENT (is) 1548 { 1549 if (is->the_bfd->my_archive) 1550 { 1551 char *pnt; 1552 bfd *arch = is->the_bfd->my_archive; 1553 1554 if (cur_arch != arch) 1555 { 1556 cur_arch = arch; 1557 is_ms_arch = 1; 1558 1559 for (is3 = is; 1560 is3 && is3->the_bfd->my_archive == arch; 1561 is3 = (lang_input_statement_type *) is3->next) 1562 { 1563 /* A MS dynamic import library can also contain static 1564 members, so look for the first element with a .dll 1565 extension, and use that for the remainder of the 1566 comparisons. */ 1567 pnt = strrchr (is3->the_bfd->filename, '.'); 1568 if (pnt != NULL && filename_cmp (pnt, ".dll") == 0) 1569 break; 1570 } 1571 1572 if (is3 == NULL) 1573 is_ms_arch = 0; 1574 else 1575 { 1576 /* OK, found one. Now look to see if the remaining 1577 (dynamic import) members use the same name. */ 1578 for (is2 = is; 1579 is2 && is2->the_bfd->my_archive == arch; 1580 is2 = (lang_input_statement_type *) is2->next) 1581 { 1582 /* Skip static members, ie anything with a .obj 1583 extension. */ 1584 pnt = strrchr (is2->the_bfd->filename, '.'); 1585 if (pnt != NULL && filename_cmp (pnt, ".obj") == 0) 1586 continue; 1587 1588 if (filename_cmp (is3->the_bfd->filename, 1589 is2->the_bfd->filename)) 1590 { 1591 is_ms_arch = 0; 1592 break; 1593 } 1594 } 1595 } 1596 } 1597 1598 /* This fragment might have come from an .obj file in a Microsoft 1599 import, and not an actual import record. If this is the case, 1600 then leave the filename alone. */ 1601 pnt = strrchr (is->the_bfd->filename, '.'); 1602 1603 if (is_ms_arch && (filename_cmp (pnt, ".dll") == 0)) 1604 { 1605 int idata2 = 0, reloc_count=0; 1606 asection *sec; 1607 char *new_name, seq; 1608 1609 for (sec = is->the_bfd->sections; sec; sec = sec->next) 1610 { 1611 if (strcmp (sec->name, ".idata\$2") == 0) 1612 idata2 = 1; 1613 reloc_count += sec->reloc_count; 1614 } 1615 1616 if (idata2) /* .idata2 is the TOC */ 1617 seq = 'a'; 1618 else if (reloc_count > 0) /* thunks */ 1619 seq = 'b'; 1620 else /* sentinel */ 1621 seq = 'c'; 1622 1623 new_name = xmalloc (strlen (is->the_bfd->filename) + 3); 1624 sprintf (new_name, "%s.%c", is->the_bfd->filename, seq); 1625 bfd_set_filename (is->the_bfd, new_name); 1626 1627 new_name = xmalloc (strlen (is->filename) + 3); 1628 sprintf (new_name, "%s.%c", is->filename, seq); 1629 is->filename = new_name; 1630 } 1631 } 1632 } 1633 } 1634} 1635 1636static void 1637gld_${EMULATION_NAME}_before_allocation (void) 1638{ 1639 is_underscoring (); 1640 before_allocation_default (); 1641} 1642 1643#ifdef DLL_SUPPORT 1644/* This is called when an input file isn't recognized as a BFD. We 1645 check here for .DEF files and pull them in automatically. */ 1646 1647static int 1648saw_option (char *option) 1649{ 1650 int i; 1651 1652 is_underscoring (); 1653 1654 for (i = 0; init[i].ptr; i++) 1655 if (strcmp (GET_INIT_SYMBOL_NAME (i), option) == 0) 1656 return init[i].inited; 1657 return 0; 1658} 1659#endif /* DLL_SUPPORT */ 1660 1661static bfd_boolean 1662gld_${EMULATION_NAME}_unrecognized_file (lang_input_statement_type *entry ATTRIBUTE_UNUSED) 1663{ 1664#ifdef DLL_SUPPORT 1665 const char *ext = entry->filename + strlen (entry->filename) - 4; 1666 1667 if (filename_cmp (ext, ".def") == 0 || filename_cmp (ext, ".DEF") == 0) 1668 { 1669 pep_def_file = def_file_parse (entry->filename, pep_def_file); 1670 1671 if (pep_def_file) 1672 { 1673 int i, buflen=0, len; 1674 char *buf; 1675 1676 for (i = 0; i < pep_def_file->num_exports; i++) 1677 { 1678 len = strlen (pep_def_file->exports[i].internal_name); 1679 if (buflen < len + 2) 1680 buflen = len + 2; 1681 } 1682 1683 buf = xmalloc (buflen); 1684 1685 for (i = 0; i < pep_def_file->num_exports; i++) 1686 { 1687 struct bfd_link_hash_entry *h; 1688 1689 sprintf (buf, "%s%s", U (""), 1690 pep_def_file->exports[i].internal_name); 1691 1692 h = bfd_link_hash_lookup (link_info.hash, buf, TRUE, TRUE, TRUE); 1693 if (h == (struct bfd_link_hash_entry *) NULL) 1694 einfo (_("%F%P: bfd_link_hash_lookup failed: %E\n")); 1695 if (h->type == bfd_link_hash_new) 1696 { 1697 h->type = bfd_link_hash_undefined; 1698 h->u.undef.abfd = NULL; 1699 bfd_link_add_undef (link_info.hash, h); 1700 } 1701 } 1702 free (buf); 1703 1704 /* def_file_print (stdout, pep_def_file); */ 1705 if (pep_def_file->is_dll == 1) 1706 link_info.type = type_dll; 1707 1708 if (pep_def_file->base_address != (bfd_vma)(-1)) 1709 { 1710 pep.ImageBase 1711 = pe_data (link_info.output_bfd)->pe_opthdr.ImageBase 1712 = init[IMAGEBASEOFF].value 1713 = pep_def_file->base_address; 1714 init[IMAGEBASEOFF].inited = 1; 1715 if (image_base_statement) 1716 image_base_statement->exp 1717 = exp_assign ("__image_base__", exp_intop (pep.ImageBase), 1718 FALSE); 1719 } 1720 1721 if (pep_def_file->stack_reserve != -1 1722 && ! saw_option ("__size_of_stack_reserve__")) 1723 { 1724 pep.SizeOfStackReserve = pep_def_file->stack_reserve; 1725 if (pep_def_file->stack_commit != -1) 1726 pep.SizeOfStackCommit = pep_def_file->stack_commit; 1727 } 1728 if (pep_def_file->heap_reserve != -1 1729 && ! saw_option ("__size_of_heap_reserve__")) 1730 { 1731 pep.SizeOfHeapReserve = pep_def_file->heap_reserve; 1732 if (pep_def_file->heap_commit != -1) 1733 pep.SizeOfHeapCommit = pep_def_file->heap_commit; 1734 } 1735 return TRUE; 1736 } 1737 } 1738#endif 1739 return FALSE; 1740} 1741 1742static bfd_boolean 1743gld_${EMULATION_NAME}_recognized_file (lang_input_statement_type *entry ATTRIBUTE_UNUSED) 1744{ 1745 is_underscoring (); 1746#ifdef DLL_SUPPORT 1747#ifdef TARGET_IS_i386pep 1748 pep_dll_id_target ("pei-x86-64"); 1749#endif 1750 if (pep_bfd_is_dll (entry->the_bfd)) 1751 return pep_implied_import_dll (entry->filename); 1752#endif 1753 return FALSE; 1754} 1755 1756static void 1757gld_${EMULATION_NAME}_finish (void) 1758{ 1759 is_underscoring (); 1760 finish_default (); 1761 1762#ifdef DLL_SUPPORT 1763 if (bfd_link_pic (&link_info) 1764 || pep_dll_enable_reloc_section 1765 || (!bfd_link_relocatable (&link_info) 1766 && pep_def_file->num_exports != 0)) 1767 { 1768 pep_dll_fill_sections (link_info.output_bfd, &link_info); 1769 if (command_line.out_implib_filename) 1770 pep_dll_generate_implib (pep_def_file, 1771 command_line.out_implib_filename, &link_info); 1772 } 1773 1774 if (pep_out_def_filename) 1775 pep_dll_generate_def_file (pep_out_def_filename); 1776#endif /* DLL_SUPPORT */ 1777 1778 /* I don't know where .idata gets set as code, but it shouldn't be. */ 1779 { 1780 asection *asec = bfd_get_section_by_name (link_info.output_bfd, ".idata"); 1781 1782 if (asec) 1783 { 1784 asec->flags &= ~SEC_CODE; 1785 asec->flags |= SEC_DATA; 1786 } 1787 } 1788} 1789 1790 1791/* Place an orphan section. 1792 1793 We use this to put sections in a reasonable place in the file, and 1794 to ensure that they are aligned as required. 1795 1796 We handle grouped sections here as well. A section named .foo\$nn 1797 goes into the output section .foo. All grouped sections are sorted 1798 by name. 1799 1800 Grouped sections for the default sections are handled by the 1801 default linker script using wildcards, and are sorted by 1802 sort_sections. */ 1803 1804static lang_output_section_statement_type * 1805gld_${EMULATION_NAME}_place_orphan (asection *s, 1806 const char *secname, 1807 int constraint) 1808{ 1809 const char *orig_secname = secname; 1810 char *dollar = NULL; 1811 lang_output_section_statement_type *os; 1812 lang_statement_list_type add_child; 1813 lang_output_section_statement_type *match_by_name = NULL; 1814 lang_statement_union_type **pl; 1815 1816 /* Look through the script to see where to place this section. */ 1817 if (!bfd_link_relocatable (&link_info) 1818 && (dollar = strchr (secname, '\$')) != NULL) 1819 { 1820 size_t len = dollar - secname; 1821 char *newname = xmalloc (len + 1); 1822 memcpy (newname, secname, len); 1823 newname[len] = '\0'; 1824 secname = newname; 1825 } 1826 1827 lang_list_init (&add_child); 1828 1829 os = NULL; 1830 if (constraint == 0) 1831 for (os = lang_output_section_find (secname); 1832 os != NULL; 1833 os = next_matching_output_section_statement (os, 0)) 1834 { 1835 /* If we don't match an existing output section, tell 1836 lang_insert_orphan to create a new output section. */ 1837 constraint = SPECIAL; 1838 1839 if (os->bfd_section != NULL 1840 && (os->bfd_section->flags == 0 1841 || ((s->flags ^ os->bfd_section->flags) 1842 & (SEC_LOAD | SEC_ALLOC)) == 0)) 1843 { 1844 /* We already have an output section statement with this 1845 name, and its bfd section has compatible flags. 1846 If the section already exists but does not have any flags set, 1847 then it has been created by the linker, probably as a result of 1848 a --section-start command line switch. */ 1849 lang_add_section (&add_child, s, NULL, os); 1850 break; 1851 } 1852 1853 /* Save unused output sections in case we can match them 1854 against orphans later. */ 1855 if (os->bfd_section == NULL) 1856 match_by_name = os; 1857 } 1858 1859 /* If we didn't match an active output section, see if we matched an 1860 unused one and use that. */ 1861 if (os == NULL && match_by_name) 1862 { 1863 lang_add_section (&match_by_name->children, s, NULL, match_by_name); 1864 return match_by_name; 1865 } 1866 1867 if (os == NULL) 1868 { 1869 static struct orphan_save hold[] = 1870 { 1871 { ".text", 1872 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE, 1873 0, 0, 0, 0 }, 1874 { ".idata", 1875 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA, 1876 0, 0, 0, 0 }, 1877 { ".rdata", 1878 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA, 1879 0, 0, 0, 0 }, 1880 { ".data", 1881 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA, 1882 0, 0, 0, 0 }, 1883 { ".bss", 1884 SEC_ALLOC, 1885 0, 0, 0, 0 } 1886 }; 1887 enum orphan_save_index 1888 { 1889 orphan_text = 0, 1890 orphan_idata, 1891 orphan_rodata, 1892 orphan_data, 1893 orphan_bss 1894 }; 1895 static int orphan_init_done = 0; 1896 struct orphan_save *place; 1897 lang_output_section_statement_type *after; 1898 etree_type *address; 1899 flagword flags; 1900 asection *nexts; 1901 1902 if (!orphan_init_done) 1903 { 1904 struct orphan_save *ho; 1905 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho) 1906 if (ho->name != NULL) 1907 { 1908 ho->os = lang_output_section_find (ho->name); 1909 if (ho->os != NULL && ho->os->flags == 0) 1910 ho->os->flags = ho->flags; 1911 } 1912 orphan_init_done = 1; 1913 } 1914 1915 flags = s->flags; 1916 if (!bfd_link_relocatable (&link_info)) 1917 { 1918 nexts = s; 1919 while ((nexts = bfd_get_next_section_by_name (nexts->owner, 1920 nexts))) 1921 if (nexts->output_section == NULL 1922 && (nexts->flags & SEC_EXCLUDE) == 0 1923 && ((nexts->flags ^ flags) & (SEC_LOAD | SEC_ALLOC)) == 0 1924 && (nexts->owner->flags & DYNAMIC) == 0 1925 && !bfd_input_just_syms (nexts->owner)) 1926 flags = (((flags ^ SEC_READONLY) 1927 | (nexts->flags ^ SEC_READONLY)) 1928 ^ SEC_READONLY); 1929 } 1930 1931 /* Try to put the new output section in a reasonable place based 1932 on the section name and section flags. */ 1933 1934 place = NULL; 1935 if ((flags & SEC_ALLOC) == 0) 1936 ; 1937 else if ((flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0) 1938 place = &hold[orphan_bss]; 1939 else if ((flags & SEC_READONLY) == 0) 1940 place = &hold[orphan_data]; 1941 else if ((flags & SEC_CODE) == 0) 1942 { 1943 place = (!strncmp (secname, ".idata\$", 7) ? &hold[orphan_idata] 1944 : &hold[orphan_rodata]); 1945 } 1946 else 1947 place = &hold[orphan_text]; 1948 1949 after = NULL; 1950 if (place != NULL) 1951 { 1952 if (place->os == NULL) 1953 place->os = lang_output_section_find (place->name); 1954 after = place->os; 1955 if (after == NULL) 1956 after = lang_output_section_find_by_flags (s, flags, &place->os, 1957 NULL); 1958 if (after == NULL) 1959 /* *ABS* is always the first output section statement. */ 1960 after = (void *) lang_os_list.head; 1961 } 1962 1963 /* All sections in an executable must be aligned to a page boundary. 1964 In a relocatable link, just preserve the incoming alignment; the 1965 address is discarded by lang_insert_orphan in that case, anyway. */ 1966 address = exp_unop (ALIGN_K, exp_nameop (NAME, "__section_alignment__")); 1967 os = lang_insert_orphan (s, secname, constraint, after, place, address, 1968 &add_child); 1969 if (bfd_link_relocatable (&link_info)) 1970 { 1971 os->section_alignment = exp_intop (1U << s->alignment_power); 1972 os->bfd_section->alignment_power = s->alignment_power; 1973 } 1974 } 1975 1976 /* If the section name has a '\$', sort it with the other '\$' 1977 sections. */ 1978 for (pl = &os->children.head; *pl != NULL; pl = &(*pl)->header.next) 1979 { 1980 lang_input_section_type *ls; 1981 const char *lname; 1982 1983 if ((*pl)->header.type != lang_input_section_enum) 1984 continue; 1985 1986 ls = &(*pl)->input_section; 1987 1988 lname = bfd_section_name (ls->section); 1989 if (strchr (lname, '\$') != NULL 1990 && (dollar == NULL || strcmp (orig_secname, lname) < 0)) 1991 break; 1992 } 1993 1994 if (add_child.head != NULL) 1995 { 1996 *add_child.tail = *pl; 1997 *pl = add_child.head; 1998 } 1999 2000 return os; 2001} 2002 2003static bfd_boolean 2004gld_${EMULATION_NAME}_open_dynamic_archive 2005 (const char *arch ATTRIBUTE_UNUSED, 2006 search_dirs_type *search, 2007 lang_input_statement_type *entry) 2008{ 2009 static const struct 2010 { 2011 const char * format; 2012 bfd_boolean use_prefix; 2013 } 2014 libname_fmt [] = 2015 { 2016 /* Preferred explicit import library for dll's. */ 2017 { "lib%s.dll.a", FALSE }, 2018 /* Alternate explicit import library for dll's. */ 2019 { "%s.dll.a", FALSE }, 2020 /* "libfoo.a" could be either an import lib or a static lib. 2021 For backwards compatibility, libfoo.a needs to precede 2022 libfoo.dll and foo.dll in the search. */ 2023 { "lib%s.a", FALSE }, 2024 /* The 'native' spelling of an import lib name is "foo.lib". */ 2025 { "%s.lib", FALSE }, 2026 /* PR 22948 - Check for an import library. */ 2027 { "lib%s.lib", FALSE }, 2028#ifdef DLL_SUPPORT 2029 /* Try "<prefix>foo.dll" (preferred dll name, if specified). */ 2030 { "%s%s.dll", TRUE }, 2031#endif 2032 /* Try "libfoo.dll" (default preferred dll name). */ 2033 { "lib%s.dll", FALSE }, 2034 /* Finally try 'native' dll name "foo.dll". */ 2035 { "%s.dll", FALSE }, 2036 /* Note: If adding more formats to this table, make sure to check to 2037 see if their length is longer than libname_fmt[0].format, and if 2038 so, update the call to xmalloc() below. */ 2039 { NULL, FALSE } 2040 }; 2041 static unsigned int format_max_len = 0; 2042 const char * filename; 2043 char * full_string; 2044 char * base_string; 2045 unsigned int i; 2046 2047 2048 if (! entry->flags.maybe_archive || entry->flags.full_name_provided) 2049 return FALSE; 2050 2051 filename = entry->filename; 2052 2053 if (format_max_len == 0) 2054 /* We need to allow space in the memory that we are going to allocate 2055 for the characters in the format string. Since the format array is 2056 static we only need to calculate this information once. In theory 2057 this value could also be computed statically, but this introduces 2058 the possibility for a discrepancy and hence a possible memory 2059 corruption. The lengths we compute here will be too long because 2060 they will include any formating characters (%s) in the strings, but 2061 this will not matter. */ 2062 for (i = 0; libname_fmt[i].format; i++) 2063 if (format_max_len < strlen (libname_fmt[i].format)) 2064 format_max_len = strlen (libname_fmt[i].format); 2065 2066 full_string = xmalloc (strlen (search->name) 2067 + strlen (filename) 2068 + format_max_len 2069#ifdef DLL_SUPPORT 2070 + (pep_dll_search_prefix 2071 ? strlen (pep_dll_search_prefix) : 0) 2072#endif 2073 /* Allow for the terminating NUL and for the path 2074 separator character that is inserted between 2075 search->name and the start of the format string. */ 2076 + 2); 2077 2078 sprintf (full_string, "%s/", search->name); 2079 base_string = full_string + strlen (full_string); 2080 2081 for (i = 0; libname_fmt[i].format; i++) 2082 { 2083#ifdef DLL_SUPPORT 2084 if (libname_fmt[i].use_prefix) 2085 { 2086 if (!pep_dll_search_prefix) 2087 continue; 2088 sprintf (base_string, libname_fmt[i].format, pep_dll_search_prefix, filename); 2089 } 2090 else 2091#endif 2092 sprintf (base_string, libname_fmt[i].format, filename); 2093 2094 if (ldfile_try_open_bfd (full_string, entry)) 2095 break; 2096 } 2097 2098 if (!libname_fmt[i].format) 2099 { 2100 free (full_string); 2101 return FALSE; 2102 } 2103 2104 entry->filename = full_string; 2105 2106 return TRUE; 2107} 2108 2109static int 2110gld_${EMULATION_NAME}_find_potential_libraries 2111 (char *name, lang_input_statement_type *entry) 2112{ 2113 return ldfile_open_file_search (name, entry, "", ".lib"); 2114} 2115 2116static char * 2117gld_${EMULATION_NAME}_get_script (int *isfile) 2118EOF 2119# Scripts compiled in. 2120# sed commands to quote an ld script as a C string. 2121sc="-f stringify.sed" 2122 2123fragment <<EOF 2124{ 2125 *isfile = 0; 2126 2127 if (bfd_link_relocatable (&link_info) && config.build_constructors) 2128 return 2129EOF 2130sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c 2131echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c 2132sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c 2133echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c 2134sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c 2135echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c 2136sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c 2137if test -n "$GENERATE_AUTO_IMPORT_SCRIPT" ; then 2138echo ' ; else if (link_info.pei386_auto_import == 1 && link_info.pei386_runtime_pseudo_reloc != 2) return' >> e${EMULATION_NAME}.c 2139sed $sc ldscripts/${EMULATION_NAME}.xa >> e${EMULATION_NAME}.c 2140fi 2141echo ' ; else return' >> e${EMULATION_NAME}.c 2142sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c 2143echo '; }' >> e${EMULATION_NAME}.c 2144 2145fragment <<EOF 2146 2147 2148struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = 2149{ 2150 gld_${EMULATION_NAME}_before_parse, 2151 syslib_default, 2152 hll_default, 2153 gld_${EMULATION_NAME}_after_parse, 2154 gld_${EMULATION_NAME}_after_open, 2155 after_check_relocs_default, 2156 after_allocation_default, 2157 set_output_arch_default, 2158 ldemul_default_target, 2159 gld_${EMULATION_NAME}_before_allocation, 2160 gld_${EMULATION_NAME}_get_script, 2161 "${EMULATION_NAME}", 2162 "${OUTPUT_FORMAT}", 2163 gld_${EMULATION_NAME}_finish, 2164 NULL, /* Create output section statements. */ 2165 gld_${EMULATION_NAME}_open_dynamic_archive, 2166 gld_${EMULATION_NAME}_place_orphan, 2167 gld_${EMULATION_NAME}_set_symbols, 2168 NULL, /* parse_args */ 2169 gld${EMULATION_NAME}_add_options, 2170 gld${EMULATION_NAME}_handle_option, 2171 gld_${EMULATION_NAME}_unrecognized_file, 2172 gld_${EMULATION_NAME}_list_options, 2173 gld_${EMULATION_NAME}_recognized_file, 2174 gld_${EMULATION_NAME}_find_potential_libraries, 2175 NULL, /* new_vers_pattern. */ 2176 NULL, /* extra_map_file_text */ 2177 ${LDEMUL_EMIT_CTF_EARLY-NULL}, 2178 ${LDEMUL_EXAMINE_STRTAB_FOR_CTF-NULL} 2179}; 2180EOF 2181