| blob | 04d722952491b8da951501fa6e55fee593020e05 |
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${EMULATION_NAME}.c # there, now line numbers match ;-)
11 fragment <<EOF
12 /* Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
13 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
15 This file is part of the GNU Binutils.
17 This program is free software; you can redistribute it and/or modify
18 it under the terms of the GNU General Public License as published by
19 the Free Software Foundation; either version 3 of the License, or
20 (at your option) any later version.
22 This program is distributed in the hope that it will be useful,
23 but WITHOUT ANY WARRANTY; without even the implied warranty of
24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 GNU General Public License for more details.
27 You should have received a copy of the GNU General Public License
28 along with this program; if not, write to the Free Software
29 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
30 MA 02110-1301, USA. */
33 /* For WINDOWS_NT */
34 /* The original file generated returned different default scripts depending
35 on whether certain switches were set, but these switches pertain to the
36 Linux system and that particular version of coff. In the NT case, we
37 only determine if the subsystem is console or windows in order to select
38 the correct entry point by default. */
40 #define TARGET_IS_${EMULATION_NAME}
42 /* Do this before including bfd.h, so we prototype the right functions. */
44 #if defined(TARGET_IS_armpe) \
45 || defined(TARGET_IS_arm_epoc_pe) \
46 || defined(TARGET_IS_arm_wince_pe)
47 #define bfd_arm_allocate_interworking_sections \
48 bfd_${EMULATION_NAME}_allocate_interworking_sections
49 #define bfd_arm_get_bfd_for_interworking \
50 bfd_${EMULATION_NAME}_get_bfd_for_interworking
51 #define bfd_arm_process_before_allocation \
52 bfd_${EMULATION_NAME}_process_before_allocation
53 #endif
55 #include "sysdep.h"
56 #include "bfd.h"
57 #include "bfdlink.h"
58 #include "getopt.h"
59 #include "libiberty.h"
60 #include "ld.h"
61 #include "ldmain.h"
62 #include "ldexp.h"
63 #include "ldlang.h"
64 #include "ldfile.h"
65 #include "ldemul.h"
66 #include <ldgram.h>
67 #include "ldlex.h"
68 #include "ldmisc.h"
69 #include "ldctor.h"
70 #include "coff/internal.h"
72 /* FIXME: See bfd/peXXigen.c for why we include an architecture specific
73 header in generic PE code. */
74 #include "coff/i386.h"
75 #include "coff/pe.h"
77 /* FIXME: This is a BFD internal header file, and we should not be
78 using it here. */
79 #include "../bfd/libcoff.h"
81 #include "deffile.h"
82 #include "pe-dll.h"
83 #include "safe-ctype.h"
85 /* Permit the emulation parameters to override the default section
86 alignment by setting OVERRIDE_SECTION_ALIGNMENT. FIXME: This makes
87 it seem that include/coff/internal.h should not define
88 PE_DEF_SECTION_ALIGNMENT. */
89 #if PE_DEF_SECTION_ALIGNMENT != ${OVERRIDE_SECTION_ALIGNMENT:-PE_DEF_SECTION_ALIGNMENT}
90 #undef PE_DEF_SECTION_ALIGNMENT
91 #define PE_DEF_SECTION_ALIGNMENT ${OVERRIDE_SECTION_ALIGNMENT}
92 #endif
94 #if defined(TARGET_IS_i386pe) \
95 || defined(TARGET_IS_shpe) \
96 || defined(TARGET_IS_mipspe) \
97 || defined(TARGET_IS_armpe) \
98 || defined(TARGET_IS_arm_epoc_pe) \
99 || defined(TARGET_IS_arm_wince_pe)
100 #define DLL_SUPPORT
101 #endif
103 #if defined(TARGET_IS_i386pe) || ! defined(DLL_SUPPORT)
104 #define PE_DEF_SUBSYSTEM 3
105 #else
106 #undef NT_EXE_IMAGE_BASE
107 #undef PE_DEF_SECTION_ALIGNMENT
108 #undef PE_DEF_FILE_ALIGNMENT
109 #define NT_EXE_IMAGE_BASE 0x00010000
111 #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_wince_pe)
112 #define PE_DEF_SECTION_ALIGNMENT 0x00001000
113 #define PE_DEF_SUBSYSTEM 9
114 #else
115 #define PE_DEF_SECTION_ALIGNMENT 0x00000400
116 #define PE_DEF_SUBSYSTEM 2
117 #endif
118 #define PE_DEF_FILE_ALIGNMENT 0x00000200
119 #endif
121 #define U(S) ${INITIAL_SYMBOL_CHAR} S
123 static struct internal_extra_pe_aouthdr pe;
124 static int dll;
125 static flagword real_flags = 0;
126 static int support_old_code = 0;
127 static char * thumb_entry_symbol = NULL;
128 static lang_assignment_statement_type *image_base_statement = 0;
129 static unsigned short pe_dll_characteristics = 0;
131 #ifdef DLL_SUPPORT
132 static int pe_enable_stdcall_fixup = -1; /* 0=disable 1=enable. */
133 static char *pe_out_def_filename = NULL;
134 static char *pe_implib_filename = NULL;
135 static int pe_enable_auto_image_base = 0;
136 static char *pe_dll_search_prefix = NULL;
137 #endif
139 extern const char *output_filename;
141 static void
142 gld_${EMULATION_NAME}_before_parse (void)
143 {
144 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
145 output_filename = "${EXECUTABLE_NAME:-a.exe}";
146 #ifdef DLL_SUPPORT
147 config.dynamic_link = TRUE;
148 config.has_shared = 1;
149 EOF
151 # Cygwin no longer wants these noisy warnings. Other PE
152 # targets might like to consider adding themselves here.
153 case ${target} in
154 *-*-cygwin*)
155 default_auto_import=1
156 ;;
157 *)
158 default_auto_import=-1
159 ;;
160 esac
162 fragment <<EOF
163 link_info.pei386_auto_import = ${default_auto_import};
164 link_info.pei386_runtime_pseudo_reloc = 1; /* Use by default version 1. */
166 #if (PE_DEF_SUBSYSTEM == 9) || (PE_DEF_SUBSYSTEM == 2)
167 #if defined TARGET_IS_mipspe || defined TARGET_IS_armpe || defined TARGET_IS_arm_wince_pe
168 lang_default_entry ("WinMainCRTStartup");
169 #else
170 lang_default_entry ("_WinMainCRTStartup");
171 #endif
172 #else
173 lang_default_entry ("${ENTRY}");
174 #endif
175 #endif
176 }
177 \f
178 /* PE format extra command line options. */
180 /* Used for setting flags in the PE header. */
181 #define OPTION_BASE_FILE (300 + 1)
182 #define OPTION_DLL (OPTION_BASE_FILE + 1)
183 #define OPTION_FILE_ALIGNMENT (OPTION_DLL + 1)
184 #define OPTION_IMAGE_BASE (OPTION_FILE_ALIGNMENT + 1)
185 #define OPTION_MAJOR_IMAGE_VERSION (OPTION_IMAGE_BASE + 1)
186 #define OPTION_MAJOR_OS_VERSION (OPTION_MAJOR_IMAGE_VERSION + 1)
187 #define OPTION_MAJOR_SUBSYSTEM_VERSION (OPTION_MAJOR_OS_VERSION + 1)
188 #define OPTION_MINOR_IMAGE_VERSION (OPTION_MAJOR_SUBSYSTEM_VERSION + 1)
189 #define OPTION_MINOR_OS_VERSION (OPTION_MINOR_IMAGE_VERSION + 1)
190 #define OPTION_MINOR_SUBSYSTEM_VERSION (OPTION_MINOR_OS_VERSION + 1)
191 #define OPTION_SECTION_ALIGNMENT (OPTION_MINOR_SUBSYSTEM_VERSION + 1)
192 #define OPTION_STACK (OPTION_SECTION_ALIGNMENT + 1)
193 #define OPTION_SUBSYSTEM (OPTION_STACK + 1)
194 #define OPTION_HEAP (OPTION_SUBSYSTEM + 1)
195 #define OPTION_SUPPORT_OLD_CODE (OPTION_HEAP + 1)
196 #define OPTION_OUT_DEF (OPTION_SUPPORT_OLD_CODE + 1)
197 #define OPTION_EXPORT_ALL (OPTION_OUT_DEF + 1)
198 #define OPTION_EXCLUDE_SYMBOLS (OPTION_EXPORT_ALL + 1)
199 #define OPTION_KILL_ATS (OPTION_EXCLUDE_SYMBOLS + 1)
200 #define OPTION_STDCALL_ALIASES (OPTION_KILL_ATS + 1)
201 #define OPTION_ENABLE_STDCALL_FIXUP (OPTION_STDCALL_ALIASES + 1)
202 #define OPTION_DISABLE_STDCALL_FIXUP (OPTION_ENABLE_STDCALL_FIXUP + 1)
203 #define OPTION_IMPLIB_FILENAME (OPTION_DISABLE_STDCALL_FIXUP + 1)
204 #define OPTION_THUMB_ENTRY (OPTION_IMPLIB_FILENAME + 1)
205 #define OPTION_WARN_DUPLICATE_EXPORTS (OPTION_THUMB_ENTRY + 1)
206 #define OPTION_IMP_COMPAT (OPTION_WARN_DUPLICATE_EXPORTS + 1)
207 #define OPTION_ENABLE_AUTO_IMAGE_BASE (OPTION_IMP_COMPAT + 1)
208 #define OPTION_DISABLE_AUTO_IMAGE_BASE (OPTION_ENABLE_AUTO_IMAGE_BASE + 1)
209 #define OPTION_DLL_SEARCH_PREFIX (OPTION_DISABLE_AUTO_IMAGE_BASE + 1)
210 #define OPTION_NO_DEFAULT_EXCLUDES (OPTION_DLL_SEARCH_PREFIX + 1)
211 #define OPTION_DLL_ENABLE_AUTO_IMPORT (OPTION_NO_DEFAULT_EXCLUDES + 1)
212 #define OPTION_DLL_DISABLE_AUTO_IMPORT (OPTION_DLL_ENABLE_AUTO_IMPORT + 1)
213 #define OPTION_ENABLE_EXTRA_PE_DEBUG (OPTION_DLL_DISABLE_AUTO_IMPORT + 1)
214 #define OPTION_EXCLUDE_LIBS (OPTION_ENABLE_EXTRA_PE_DEBUG + 1)
215 #define OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC \
216 (OPTION_EXCLUDE_LIBS + 1)
217 #define OPTION_DLL_DISABLE_RUNTIME_PSEUDO_RELOC \
218 (OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC + 1)
219 #define OPTION_LARGE_ADDRESS_AWARE \
220 (OPTION_DLL_DISABLE_RUNTIME_PSEUDO_RELOC + 1)
221 #define OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V1 \
222 (OPTION_LARGE_ADDRESS_AWARE + 1)
223 #define OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V2 \
224 (OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V1 + 1)
225 #define OPTION_EXCLUDE_MODULES_FOR_IMPLIB \
226 (OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V2 + 1)
227 #define OPTION_USE_NUL_PREFIXED_IMPORT_TABLES \
228 (OPTION_EXCLUDE_MODULES_FOR_IMPLIB + 1)
229 #define OPTION_ENABLE_LONG_SECTION_NAMES \
230 (OPTION_USE_NUL_PREFIXED_IMPORT_TABLES + 1)
231 #define OPTION_DISABLE_LONG_SECTION_NAMES \
232 (OPTION_ENABLE_LONG_SECTION_NAMES + 1)
233 /* DLLCharacteristics flags */
234 #define OPTION_DYNAMIC_BASE (OPTION_DISABLE_LONG_SECTION_NAMES + 1)
235 #define OPTION_FORCE_INTEGRITY (OPTION_DYNAMIC_BASE + 1)
236 #define OPTION_NX_COMPAT (OPTION_FORCE_INTEGRITY + 1)
237 #define OPTION_NO_ISOLATION (OPTION_NX_COMPAT + 1)
238 #define OPTION_NO_SEH (OPTION_NO_ISOLATION + 1)
239 #define OPTION_NO_BIND (OPTION_NO_SEH + 1)
240 #define OPTION_WDM_DRIVER (OPTION_NO_BIND + 1)
241 #define OPTION_TERMINAL_SERVER_AWARE (OPTION_WDM_DRIVER + 1)
243 static void
244 gld${EMULATION_NAME}_add_options
245 (int ns ATTRIBUTE_UNUSED, char **shortopts ATTRIBUTE_UNUSED, int nl,
246 struct option **longopts, int nrl ATTRIBUTE_UNUSED,
247 struct option **really_longopts ATTRIBUTE_UNUSED)
248 {
249 static const struct option xtra_long[] = {
250 /* PE options */
251 {"base-file", required_argument, NULL, OPTION_BASE_FILE},
252 {"dll", no_argument, NULL, OPTION_DLL},
253 {"file-alignment", required_argument, NULL, OPTION_FILE_ALIGNMENT},
254 {"heap", required_argument, NULL, OPTION_HEAP},
255 {"image-base", required_argument, NULL, OPTION_IMAGE_BASE},
256 {"major-image-version", required_argument, NULL, OPTION_MAJOR_IMAGE_VERSION},
257 {"major-os-version", required_argument, NULL, OPTION_MAJOR_OS_VERSION},
258 {"major-subsystem-version", required_argument, NULL, OPTION_MAJOR_SUBSYSTEM_VERSION},
259 {"minor-image-version", required_argument, NULL, OPTION_MINOR_IMAGE_VERSION},
260 {"minor-os-version", required_argument, NULL, OPTION_MINOR_OS_VERSION},
261 {"minor-subsystem-version", required_argument, NULL, OPTION_MINOR_SUBSYSTEM_VERSION},
262 {"section-alignment", required_argument, NULL, OPTION_SECTION_ALIGNMENT},
263 {"stack", required_argument, NULL, OPTION_STACK},
264 {"subsystem", required_argument, NULL, OPTION_SUBSYSTEM},
265 {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE},
266 {"thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
267 {"use-nul-prefixed-import-tables", no_argument, NULL,
268 OPTION_USE_NUL_PREFIXED_IMPORT_TABLES},
269 #ifdef DLL_SUPPORT
270 /* getopt allows abbreviations, so we do this to stop it from treating -o
271 as an abbreviation for this option */
272 {"output-def", required_argument, NULL, OPTION_OUT_DEF},
273 {"output-def", required_argument, NULL, OPTION_OUT_DEF},
274 {"export-all-symbols", no_argument, NULL, OPTION_EXPORT_ALL},
275 {"exclude-symbols", required_argument, NULL, OPTION_EXCLUDE_SYMBOLS},
276 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
277 {"exclude-modules-for-implib", required_argument, NULL, OPTION_EXCLUDE_MODULES_FOR_IMPLIB},
278 {"kill-at", no_argument, NULL, OPTION_KILL_ATS},
279 {"add-stdcall-alias", no_argument, NULL, OPTION_STDCALL_ALIASES},
280 {"enable-stdcall-fixup", no_argument, NULL, OPTION_ENABLE_STDCALL_FIXUP},
281 {"disable-stdcall-fixup", no_argument, NULL, OPTION_DISABLE_STDCALL_FIXUP},
282 {"out-implib", required_argument, NULL, OPTION_IMPLIB_FILENAME},
283 {"warn-duplicate-exports", no_argument, NULL, OPTION_WARN_DUPLICATE_EXPORTS},
284 /* getopt() allows abbreviations, so we do this to stop it from
285 treating -c as an abbreviation for these --compat-implib. */
286 {"compat-implib", no_argument, NULL, OPTION_IMP_COMPAT},
287 {"compat-implib", no_argument, NULL, OPTION_IMP_COMPAT},
288 {"enable-auto-image-base", no_argument, NULL, OPTION_ENABLE_AUTO_IMAGE_BASE},
289 {"disable-auto-image-base", no_argument, NULL, OPTION_DISABLE_AUTO_IMAGE_BASE},
290 {"dll-search-prefix", required_argument, NULL, OPTION_DLL_SEARCH_PREFIX},
291 {"no-default-excludes", no_argument, NULL, OPTION_NO_DEFAULT_EXCLUDES},
292 {"enable-auto-import", no_argument, NULL, OPTION_DLL_ENABLE_AUTO_IMPORT},
293 {"disable-auto-import", no_argument, NULL, OPTION_DLL_DISABLE_AUTO_IMPORT},
294 {"enable-extra-pe-debug", no_argument, NULL, OPTION_ENABLE_EXTRA_PE_DEBUG},
295 {"enable-runtime-pseudo-reloc", no_argument, NULL, OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC},
296 {"disable-runtime-pseudo-reloc", no_argument, NULL, OPTION_DLL_DISABLE_RUNTIME_PSEUDO_RELOC},
297 {"enable-runtime-pseudo-reloc-v1", no_argument, NULL, OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V1},
298 {"enable-runtime-pseudo-reloc-v2", no_argument, NULL, OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V2},
299 #endif
300 {"large-address-aware", no_argument, NULL, OPTION_LARGE_ADDRESS_AWARE},
301 {"enable-long-section-names", no_argument, NULL, OPTION_ENABLE_LONG_SECTION_NAMES},
302 {"disable-long-section-names", no_argument, NULL, OPTION_DISABLE_LONG_SECTION_NAMES},
303 {"dynamicbase",no_argument, NULL, OPTION_DYNAMIC_BASE},
304 {"forceinteg", no_argument, NULL, OPTION_FORCE_INTEGRITY},
305 {"nxcompat", no_argument, NULL, OPTION_NX_COMPAT},
306 {"no-isolation", no_argument, NULL, OPTION_NO_ISOLATION},
307 {"no-seh", no_argument, NULL, OPTION_NO_SEH},
308 {"no-bind", no_argument, NULL, OPTION_NO_BIND},
309 {"wdmdriver", no_argument, NULL, OPTION_WDM_DRIVER},
310 {"tsaware", no_argument, NULL, OPTION_TERMINAL_SERVER_AWARE},
311 {NULL, no_argument, NULL, 0}
312 };
314 *longopts = (struct option *)
315 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
316 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
317 }
319 /* PE/WIN32; added routines to get the subsystem type, heap and/or stack
320 parameters which may be input from the command line. */
322 typedef struct
323 {
324 void *ptr;
325 int size;
326 int value;
327 char *symbol;
328 int inited;
329 } definfo;
331 #define D(field,symbol,def) {&pe.field,sizeof(pe.field), def, symbol,0}
333 static definfo init[] =
334 {
335 /* imagebase must be first */
336 #define IMAGEBASEOFF 0
337 D(ImageBase,"__image_base__", NT_EXE_IMAGE_BASE),
338 #define DLLOFF 1
339 {&dll, sizeof(dll), 0, "__dll__", 0},
340 #define MSIMAGEBASEOFF 2
341 D(ImageBase, U ("__ImageBase"), NT_EXE_IMAGE_BASE),
342 D(SectionAlignment,"__section_alignment__", PE_DEF_SECTION_ALIGNMENT),
343 D(FileAlignment,"__file_alignment__", PE_DEF_FILE_ALIGNMENT),
344 D(MajorOperatingSystemVersion,"__major_os_version__", 4),
345 D(MinorOperatingSystemVersion,"__minor_os_version__", 0),
346 D(MajorImageVersion,"__major_image_version__", 1),
347 D(MinorImageVersion,"__minor_image_version__", 0),
348 #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_wince_pe)
349 D(MajorSubsystemVersion,"__major_subsystem_version__", 3),
350 #else
351 D(MajorSubsystemVersion,"__major_subsystem_version__", 4),
352 #endif
353 D(MinorSubsystemVersion,"__minor_subsystem_version__", 0),
354 D(Subsystem,"__subsystem__", ${SUBSYSTEM}),
355 D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x200000),
356 D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000),
357 D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000),
358 D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000),
359 D(LoaderFlags,"__loader_flags__", 0x0),
360 D(DllCharacteristics, "__dll_characteristics__", 0x0),
361 { NULL, 0, 0, NULL, 0 }
362 };
365 static void
366 gld_${EMULATION_NAME}_list_options (FILE *file)
367 {
368 fprintf (file, _(" --base_file <basefile> Generate a base file for relocatable DLLs\n"));
369 fprintf (file, _(" --dll Set image base to the default for DLLs\n"));
370 fprintf (file, _(" --file-alignment <size> Set file alignment\n"));
371 fprintf (file, _(" --heap <size> Set initial size of the heap\n"));
372 fprintf (file, _(" --image-base <address> Set start address of the executable\n"));
373 fprintf (file, _(" --major-image-version <number> Set version number of the executable\n"));
374 fprintf (file, _(" --major-os-version <number> Set minimum required OS version\n"));
375 fprintf (file, _(" --major-subsystem-version <number> Set minimum required OS subsystem version\n"));
376 fprintf (file, _(" --minor-image-version <number> Set revision number of the executable\n"));
377 fprintf (file, _(" --minor-os-version <number> Set minimum required OS revision\n"));
378 fprintf (file, _(" --minor-subsystem-version <number> Set minimum required OS subsystem revision\n"));
379 fprintf (file, _(" --section-alignment <size> Set section alignment\n"));
380 fprintf (file, _(" --stack <size> Set size of the initial stack\n"));
381 fprintf (file, _(" --subsystem <name>[:<version>] Set required OS subsystem [& version]\n"));
382 fprintf (file, _(" --support-old-code Support interworking with old code\n"));
383 fprintf (file, _(" --thumb-entry=<symbol> Set the entry point to be Thumb <symbol>\n"));
384 #ifdef DLL_SUPPORT
385 fprintf (file, _(" --add-stdcall-alias Export symbols with and without @nn\n"));
386 fprintf (file, _(" --disable-stdcall-fixup Don't link _sym to _sym@nn\n"));
387 fprintf (file, _(" --enable-stdcall-fixup Link _sym to _sym@nn without warnings\n"));
388 fprintf (file, _(" --exclude-symbols sym,sym,... Exclude symbols from automatic export\n"));
389 fprintf (file, _(" --exclude-libs lib,lib,... Exclude libraries from automatic export\n"));
390 fprintf (file, _(" --exclude-modules-for-implib mod,mod,...\n"));
391 fprintf (file, _(" Exclude objects, archive members from auto\n"));
392 fprintf (file, _(" export, place into import library instead.\n"));
393 fprintf (file, _(" --export-all-symbols Automatically export all globals to DLL\n"));
394 fprintf (file, _(" --kill-at Remove @nn from exported symbols\n"));
395 fprintf (file, _(" --out-implib <file> Generate import library\n"));
396 fprintf (file, _(" --output-def <file> Generate a .DEF file for the built DLL\n"));
397 fprintf (file, _(" --warn-duplicate-exports Warn about duplicate exports.\n"));
398 fprintf (file, _(" --compat-implib Create backward compatible import libs;\n\
399 create __imp_<SYMBOL> as well.\n"));
400 fprintf (file, _(" --enable-auto-image-base Automatically choose image base for DLLs\n\
401 unless user specifies one\n"));
402 fprintf (file, _(" --disable-auto-image-base Do not auto-choose image base. (default)\n"));
403 fprintf (file, _(" --dll-search-prefix=<string> When linking dynamically to a dll without\n\
404 an importlib, use <string><basename>.dll\n\
405 in preference to lib<basename>.dll \n"));
406 fprintf (file, _(" --enable-auto-import Do sophistcated linking of _sym to\n\
407 __imp_sym for DATA references\n"));
408 fprintf (file, _(" --disable-auto-import Do not auto-import DATA items from DLLs\n"));
409 fprintf (file, _(" --enable-runtime-pseudo-reloc Work around auto-import limitations by\n\
410 adding pseudo-relocations resolved at\n\
411 runtime.\n"));
412 fprintf (file, _(" --disable-runtime-pseudo-reloc Do not add runtime pseudo-relocations for\n\
413 auto-imported DATA.\n"));
414 fprintf (file, _(" --enable-extra-pe-debug Enable verbose debug output when building\n\
415 or linking to DLLs (esp. auto-import)\n"));
416 #endif
417 fprintf (file, _(" --large-address-aware Executable supports virtual addresses\n\
418 greater than 2 gigabytes\n"));
419 fprintf (file, _(" --enable-long-section-names Use long COFF section names even in\n\
420 executable image files\n"));
421 fprintf (file, _(" --disable-long-section-names Never use long COFF section names, even\n\
422 in object files\n"));
423 fprintf (file, _(" --dynamicbase Image base address may be relocated using\n\
424 address space layout randomization (ASLR)\n"));
425 fprintf (file, _(" --forceinteg Code integrity checks are enforced\n"));
426 fprintf (file, _(" --nxcompat Image is compatible with data execution prevention\n"));
427 fprintf (file, _(" --no-isolation Image understands isolation but do not isolate the image\n"));
428 fprintf (file, _(" --no-seh Image does not use SEH. No SE handler may\n\
429 be called in this image\n"));
430 fprintf (file, _(" --no-bind Do not bind this image\n"));
431 fprintf (file, _(" --wdmdriver Driver uses the WDM model\n"));
432 fprintf (file, _(" --tsaware Image is Terminal Server aware\n"));
433 }
436 static void
437 set_pe_name (char *name, long val)
438 {
439 int i;
441 /* Find the name and set it. */
442 for (i = 0; init[i].ptr; i++)
443 {
444 if (strcmp (name, init[i].symbol) == 0)
445 {
446 init[i].value = val;
447 init[i].inited = 1;
448 if (strcmp (name,"__image_base__") == 0)
449 set_pe_name (U ("__ImageBase"), val);
450 return;
451 }
452 }
453 abort ();
454 }
457 static void
458 set_pe_subsystem (void)
459 {
460 const char *sver;
461 const char *entry;
462 const char *initial_symbol_char;
463 char *end;
464 int len;
465 int i;
466 int subsystem;
467 unsigned long temp_subsystem;
468 static const struct
469 {
470 const char *name;
471 const int value;
472 const char *entry;
473 }
474 v[] =
475 {
476 { "native", 1, "NtProcessStartup" },
477 { "windows", 2, "WinMainCRTStartup" },
478 { "console", 3, "mainCRTStartup" },
479 { "posix", 7, "__PosixProcessStartup"},
480 { "wince", 9, "WinMainCRTStartup" },
481 { "xbox", 14, "mainCRTStartup" },
482 { NULL, 0, NULL }
483 };
484 /* Entry point name for arbitrary subsystem numbers. */
485 static const char default_entry[] = "mainCRTStartup";
487 /* Check for the presence of a version number. */
488 sver = strchr (optarg, ':');
489 if (sver == NULL)
490 len = strlen (optarg);
491 else
492 {
493 len = sver - optarg;
494 set_pe_name ("__major_subsystem_version__",
495 strtoul (sver + 1, &end, 0));
496 if (*end == '.')
497 set_pe_name ("__minor_subsystem_version__",
498 strtoul (end + 1, &end, 0));
499 if (*end != '\0')
500 einfo (_("%P: warning: bad version number in -subsystem option\n"));
501 }
503 /* Check for numeric subsystem. */
504 temp_subsystem = strtoul (optarg, & end, 0);
505 if ((*end == ':' || *end == '\0') && (temp_subsystem < 65536))
506 {
507 /* Search list for a numeric match to use its entry point. */
508 for (i = 0; v[i].name; i++)
509 if (v[i].value == (int) temp_subsystem)
510 break;
512 /* If no match, use the default. */
513 if (v[i].name != NULL)
514 entry = v[i].entry;
515 else
516 entry = default_entry;
518 /* Use this subsystem. */
519 subsystem = (int) temp_subsystem;
520 }
521 else
522 {
523 /* Search for subsystem by name. */
524 for (i = 0; v[i].name; i++)
525 if (strncmp (optarg, v[i].name, len) == 0
526 && v[i].name[len] == '\0')
527 break;
529 if (v[i].name == NULL)
530 {
531 einfo (_("%P%F: invalid subsystem type %s\n"), optarg);
532 return;
533 }
535 entry = v[i].entry;
536 subsystem = v[i].value;
537 }
539 set_pe_name ("__subsystem__", subsystem);
541 initial_symbol_char = ${INITIAL_SYMBOL_CHAR};
542 if (*initial_symbol_char != '\0')
543 {
544 char *alc_entry;
546 /* lang_default_entry expects its argument to be permanently
547 allocated, so we don't free this string. */
548 alc_entry = xmalloc (strlen (initial_symbol_char)
549 + strlen (entry)
550 + 1);
551 strcpy (alc_entry, initial_symbol_char);
552 strcat (alc_entry, entry);
553 entry = alc_entry;
554 }
556 lang_default_entry (entry);
558 return;
559 }
562 static void
563 set_pe_value (char *name)
564 {
565 char *end;
567 set_pe_name (name, strtoul (optarg, &end, 0));
569 if (end == optarg)
570 einfo (_("%P%F: invalid hex number for PE parameter '%s'\n"), optarg);
572 optarg = end;
573 }
576 static void
577 set_pe_stack_heap (char *resname, char *comname)
578 {
579 set_pe_value (resname);
581 if (*optarg == ',')
582 {
583 optarg++;
584 set_pe_value (comname);
585 }
586 else if (*optarg)
587 einfo (_("%P%F: strange hex info for PE parameter '%s'\n"), optarg);
588 }
591 static bfd_boolean
592 gld${EMULATION_NAME}_handle_option (int optc)
593 {
594 switch (optc)
595 {
596 default:
597 return FALSE;
599 case OPTION_BASE_FILE:
600 link_info.base_file = fopen (optarg, FOPEN_WB);
601 if (link_info.base_file == NULL)
602 {
603 /* xgettext:c-format */
604 fprintf (stderr, _("%s: Can't open base file %s\n"),
605 program_name, optarg);
606 xexit (1);
607 }
608 break;
610 /* PE options. */
611 case OPTION_HEAP:
612 set_pe_stack_heap ("__size_of_heap_reserve__", "__size_of_heap_commit__");
613 break;
614 case OPTION_STACK:
615 set_pe_stack_heap ("__size_of_stack_reserve__", "__size_of_stack_commit__");
616 break;
617 case OPTION_SUBSYSTEM:
618 set_pe_subsystem ();
619 break;
620 case OPTION_MAJOR_OS_VERSION:
621 set_pe_value ("__major_os_version__");
622 break;
623 case OPTION_MINOR_OS_VERSION:
624 set_pe_value ("__minor_os_version__");
625 break;
626 case OPTION_MAJOR_SUBSYSTEM_VERSION:
627 set_pe_value ("__major_subsystem_version__");
628 break;
629 case OPTION_MINOR_SUBSYSTEM_VERSION:
630 set_pe_value ("__minor_subsystem_version__");
631 break;
632 case OPTION_MAJOR_IMAGE_VERSION:
633 set_pe_value ("__major_image_version__");
634 break;
635 case OPTION_MINOR_IMAGE_VERSION:
636 set_pe_value ("__minor_image_version__");
637 break;
638 case OPTION_FILE_ALIGNMENT:
639 set_pe_value ("__file_alignment__");
640 break;
641 case OPTION_SECTION_ALIGNMENT:
642 set_pe_value ("__section_alignment__");
643 break;
644 case OPTION_DLL:
645 set_pe_name ("__dll__", 1);
646 break;
647 case OPTION_IMAGE_BASE:
648 set_pe_value ("__image_base__");
649 break;
650 case OPTION_SUPPORT_OLD_CODE:
651 support_old_code = 1;
652 break;
653 case OPTION_THUMB_ENTRY:
654 thumb_entry_symbol = optarg;
655 break;
656 case OPTION_USE_NUL_PREFIXED_IMPORT_TABLES:
657 pe_use_nul_prefixed_import_tables = TRUE;
658 break;
659 #ifdef DLL_SUPPORT
660 case OPTION_OUT_DEF:
661 pe_out_def_filename = xstrdup (optarg);
662 break;
663 case OPTION_EXPORT_ALL:
664 pe_dll_export_everything = 1;
665 break;
666 case OPTION_EXCLUDE_SYMBOLS:
667 pe_dll_add_excludes (optarg, EXCLUDESYMS);
668 break;
669 case OPTION_EXCLUDE_LIBS:
670 pe_dll_add_excludes (optarg, EXCLUDELIBS);
671 break;
672 case OPTION_EXCLUDE_MODULES_FOR_IMPLIB:
673 pe_dll_add_excludes (optarg, EXCLUDEFORIMPLIB);
674 break;
675 case OPTION_KILL_ATS:
676 pe_dll_kill_ats = 1;
677 break;
678 case OPTION_STDCALL_ALIASES:
679 pe_dll_stdcall_aliases = 1;
680 break;
681 case OPTION_ENABLE_STDCALL_FIXUP:
682 pe_enable_stdcall_fixup = 1;
683 break;
684 case OPTION_DISABLE_STDCALL_FIXUP:
685 pe_enable_stdcall_fixup = 0;
686 break;
687 case OPTION_IMPLIB_FILENAME:
688 pe_implib_filename = xstrdup (optarg);
689 break;
690 case OPTION_WARN_DUPLICATE_EXPORTS:
691 pe_dll_warn_dup_exports = 1;
692 break;
693 case OPTION_IMP_COMPAT:
694 pe_dll_compat_implib = 1;
695 break;
696 case OPTION_ENABLE_AUTO_IMAGE_BASE:
697 pe_enable_auto_image_base = 1;
698 break;
699 case OPTION_DISABLE_AUTO_IMAGE_BASE:
700 pe_enable_auto_image_base = 0;
701 break;
702 case OPTION_DLL_SEARCH_PREFIX:
703 pe_dll_search_prefix = xstrdup (optarg);
704 break;
705 case OPTION_NO_DEFAULT_EXCLUDES:
706 pe_dll_do_default_excludes = 0;
707 break;
708 case OPTION_DLL_ENABLE_AUTO_IMPORT:
709 link_info.pei386_auto_import = 1;
710 break;
711 case OPTION_DLL_DISABLE_AUTO_IMPORT:
712 link_info.pei386_auto_import = 0;
713 break;
714 case OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC:
715 link_info.pei386_runtime_pseudo_reloc = 1;
716 break;
717 case OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V1:
718 link_info.pei386_runtime_pseudo_reloc = 1;
719 break;
720 case OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V2:
721 link_info.pei386_runtime_pseudo_reloc = 2;
722 break;
723 case OPTION_DLL_DISABLE_RUNTIME_PSEUDO_RELOC:
724 link_info.pei386_runtime_pseudo_reloc = 0;
725 break;
726 case OPTION_ENABLE_EXTRA_PE_DEBUG:
727 pe_dll_extra_pe_debug = 1;
728 break;
729 #endif
730 case OPTION_LARGE_ADDRESS_AWARE:
731 real_flags |= IMAGE_FILE_LARGE_ADDRESS_AWARE;
732 break;
733 case OPTION_ENABLE_LONG_SECTION_NAMES:
734 pe_use_coff_long_section_names = 1;
735 break;
736 case OPTION_DISABLE_LONG_SECTION_NAMES:
737 pe_use_coff_long_section_names = 0;
738 break;
739 /* Get DLLCharacteristics bits */
740 case OPTION_DYNAMIC_BASE:
741 pe_dll_characteristics |= IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE;
742 break;
743 case OPTION_FORCE_INTEGRITY:
744 pe_dll_characteristics |= IMAGE_DLL_CHARACTERISTICS_FORCE_INTEGRITY;
745 break;
746 case OPTION_NX_COMPAT:
747 pe_dll_characteristics |= IMAGE_DLL_CHARACTERISTICS_NX_COMPAT;
748 break;
749 case OPTION_NO_ISOLATION:
750 pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_NO_ISOLATION;
751 break;
752 case OPTION_NO_SEH:
753 pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_NO_SEH;
754 break;
755 case OPTION_NO_BIND:
756 pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_NO_BIND;
757 break;
758 case OPTION_WDM_DRIVER:
759 pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_WDM_DRIVER;
760 break;
761 case OPTION_TERMINAL_SERVER_AWARE:
762 pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE;
763 break;
764 }
766 /* Set DLLCharacteristics bits */
767 set_pe_name ("__dll_characteristics__", pe_dll_characteristics);
769 return TRUE;
770 }
771 \f
773 #ifdef DLL_SUPPORT
774 static unsigned long
775 strhash (const char *str)
776 {
777 const unsigned char *s;
778 unsigned long hash;
779 unsigned int c;
780 unsigned int len;
782 hash = 0;
783 len = 0;
784 s = (const unsigned char *) str;
785 while ((c = *s++) != '\0')
786 {
787 hash += c + (c << 17);
788 hash ^= hash >> 2;
789 ++len;
790 }
791 hash += len + (len << 17);
792 hash ^= hash >> 2;
794 return hash;
795 }
797 /* Use the output file to create a image base for relocatable DLLs. */
799 static unsigned long
800 compute_dll_image_base (const char *ofile)
801 {
802 unsigned long hash = strhash (ofile);
803 return 0x61300000 + ((hash << 16) & 0x0FFC0000);
804 }
805 #endif
807 /* Assign values to the special symbols before the linker script is
808 read. */
810 static void
811 gld_${EMULATION_NAME}_set_symbols (void)
812 {
813 /* Run through and invent symbols for all the
814 names and insert the defaults. */
815 int j;
817 if (!init[IMAGEBASEOFF].inited)
818 {
819 if (link_info.relocatable)
820 init[IMAGEBASEOFF].value = 0;
821 else if (init[DLLOFF].value || (link_info.shared && !link_info.pie))
822 #ifdef DLL_SUPPORT
823 init[IMAGEBASEOFF].value = (pe_enable_auto_image_base) ?
824 compute_dll_image_base (output_filename) : NT_DLL_IMAGE_BASE;
825 #else
826 init[IMAGEBASEOFF].value = NT_DLL_IMAGE_BASE;
827 #endif
828 else
829 init[IMAGEBASEOFF].value = NT_EXE_IMAGE_BASE;
830 init[MSIMAGEBASEOFF].value = init[IMAGEBASEOFF].value;
831 }
833 /* Don't do any symbol assignments if this is a relocatable link. */
834 if (link_info.relocatable)
835 return;
837 /* Glue the assignments into the abs section. */
838 push_stat_ptr (&abs_output_section->children);
840 for (j = 0; init[j].ptr; j++)
841 {
842 long val = init[j].value;
843 lang_assignment_statement_type *rv;
844 rv = lang_add_assignment (exp_assop ('=', init[j].symbol,
845 exp_intop (val)));
846 if (init[j].size == sizeof (short))
847 *(short *) init[j].ptr = val;
848 else if (init[j].size == sizeof (int))
849 *(int *) init[j].ptr = val;
850 else if (init[j].size == sizeof (long))
851 *(long *) init[j].ptr = val;
852 /* This might be a long long or other special type. */
853 else if (init[j].size == sizeof (bfd_vma))
854 *(bfd_vma *) init[j].ptr = val;
855 else abort ();
856 if (j == IMAGEBASEOFF)
857 image_base_statement = rv;
858 }
859 /* Restore the pointer. */
860 pop_stat_ptr ();
862 if (pe.FileAlignment >
863 pe.SectionAlignment)
864 {
865 einfo (_("%P: warning, file alignment > section alignment.\n"));
866 }
867 }
869 /* This is called after the linker script and the command line options
870 have been read. */
872 static void
873 gld_${EMULATION_NAME}_after_parse (void)
874 {
875 /* The Windows libraries are designed for the linker to treat the
876 entry point as an undefined symbol. Otherwise, the .obj that
877 defines mainCRTStartup is brought in because it is the first
878 encountered in libc.lib and it has other symbols in it which will
879 be pulled in by the link process. To avoid this, we act as
880 though the user specified -u with the entry point symbol.
882 This function is called after the linker script and command line
883 options have been read, so at this point we know the right entry
884 point. This function is called before the input files are
885 opened, so registering the symbol as undefined will make a
886 difference. */
888 if (! link_info.relocatable && entry_symbol.name != NULL)
889 ldlang_add_undef (entry_symbol.name);
890 }
892 /* pe-dll.c directly accesses pe_data_import_dll,
893 so it must be defined outside of #ifdef DLL_SUPPORT.
894 Note - this variable is deliberately not initialised.
895 This allows it to be treated as a common varaible, and only
896 exist in one incarnation in a multiple target enabled linker. */
897 char * pe_data_import_dll;
899 #ifdef DLL_SUPPORT
900 static struct bfd_link_hash_entry *pe_undef_found_sym;
902 static bfd_boolean
903 pe_undef_cdecl_match (struct bfd_link_hash_entry *h, void *inf)
904 {
905 int sl;
906 char *string = inf;
908 sl = strlen (string);
909 if (h->type == bfd_link_hash_defined
910 && strncmp (h->root.string, string, sl) == 0
911 && h->root.string[sl] == '@')
912 {
913 pe_undef_found_sym = h;
914 return FALSE;
915 }
916 return TRUE;
917 }
919 static void
920 pe_fixup_stdcalls (void)
921 {
922 static int gave_warning_message = 0;
923 struct bfd_link_hash_entry *undef, *sym;
925 if (pe_dll_extra_pe_debug)
926 printf ("%s\n", __FUNCTION__);
928 for (undef = link_info.hash->undefs; undef; undef=undef->u.undef.next)
929 if (undef->type == bfd_link_hash_undefined)
930 {
931 char* at = strchr (undef->root.string, '@');
932 int lead_at = (*undef->root.string == '@');
933 /* For now, don't try to fixup fastcall symbols. */
935 if (at && !lead_at)
936 {
937 /* The symbol is a stdcall symbol, so let's look for a
938 cdecl symbol with the same name and resolve to that. */
939 char *cname = xstrdup (undef->root.string /* + lead_at */);
940 at = strchr (cname, '@');
941 *at = 0;
942 sym = bfd_link_hash_lookup (link_info.hash, cname, 0, 0, 1);
944 if (sym && sym->type == bfd_link_hash_defined)
945 {
946 undef->type = bfd_link_hash_defined;
947 undef->u.def.value = sym->u.def.value;
948 undef->u.def.section = sym->u.def.section;
950 if (pe_enable_stdcall_fixup == -1)
951 {
952 einfo (_("Warning: resolving %s by linking to %s\n"),
953 undef->root.string, cname);
954 if (! gave_warning_message)
955 {
956 gave_warning_message = 1;
957 einfo (_("Use --enable-stdcall-fixup to disable these warnings\n"));
958 einfo (_("Use --disable-stdcall-fixup to disable these fixups\n"));
959 }
960 }
961 }
962 }
963 else
964 {
965 /* The symbol is a cdecl symbol, so we look for stdcall
966 symbols - which means scanning the whole symbol table. */
967 pe_undef_found_sym = 0;
968 bfd_link_hash_traverse (link_info.hash, pe_undef_cdecl_match,
969 (char *) undef->root.string);
970 sym = pe_undef_found_sym;
971 if (sym)
972 {
973 undef->type = bfd_link_hash_defined;
974 undef->u.def.value = sym->u.def.value;
975 undef->u.def.section = sym->u.def.section;
977 if (pe_enable_stdcall_fixup == -1)
978 {
979 einfo (_("Warning: resolving %s by linking to %s\n"),
980 undef->root.string, sym->root.string);
981 if (! gave_warning_message)
982 {
983 gave_warning_message = 1;
984 einfo (_("Use --enable-stdcall-fixup to disable these warnings\n"));
985 einfo (_("Use --disable-stdcall-fixup to disable these fixups\n"));
986 }
987 }
988 }
989 }
990 }
991 }
993 static int
994 make_import_fixup (arelent *rel, asection *s)
995 {
996 struct bfd_symbol *sym = *rel->sym_ptr_ptr;
997 char addend[4];
999 if (pe_dll_extra_pe_debug)
1000 printf ("arelent: %s@%#lx: add=%li\n", sym->name,
1001 (unsigned long) rel->address, (long) rel->addend);
1003 if (! bfd_get_section_contents (s->owner, s, addend, rel->address, sizeof (addend)))
1004 einfo (_("%C: Cannot get section contents - auto-import exception\n"),
1005 s->owner, s, rel->address);
1007 pe_create_import_fixup (rel, s, bfd_get_32 (s->owner, addend));
1009 return 1;
1010 }
1012 static void
1013 pe_find_data_imports (void)
1014 {
1015 struct bfd_link_hash_entry *undef, *sym;
1017 if (link_info.pei386_auto_import == 0)
1018 return;
1020 for (undef = link_info.hash->undefs; undef; undef=undef->u.undef.next)
1021 {
1022 if (undef->type == bfd_link_hash_undefined)
1023 {
1024 /* C++ symbols are *long*. */
1025 char buf[4096];
1027 if (pe_dll_extra_pe_debug)
1028 printf ("%s:%s\n", __FUNCTION__, undef->root.string);
1030 sprintf (buf, "__imp_%s", undef->root.string);
1032 sym = bfd_link_hash_lookup (link_info.hash, buf, 0, 0, 1);
1034 if (sym && sym->type == bfd_link_hash_defined)
1035 {
1036 bfd *b = sym->u.def.section->owner;
1037 asymbol **symbols;
1038 int nsyms, i;
1040 if (link_info.pei386_auto_import == -1)
1041 {
1042 static bfd_boolean warned = FALSE;
1044 info_msg (_("Info: resolving %s by linking to %s (auto-import)\n"),
1045 undef->root.string, buf);
1047 /* PR linker/4844. */
1048 if (! warned)
1049 {
1050 warned = TRUE;
1051 einfo (_("%P: warning: auto-importing has been activated without --enable-auto-import specified on the command line.\n\
1052 This should work unless it involves constant data structures referencing symbols from auto-imported DLLs.\n"));
1053 }
1054 }
1056 if (!bfd_generic_link_read_symbols (b))
1057 {
1058 einfo (_("%B%F: could not read symbols: %E\n"), b);
1059 return;
1060 }
1062 symbols = bfd_get_outsymbols (b);
1063 nsyms = bfd_get_symcount (b);
1065 for (i = 0; i < nsyms; i++)
1066 {
1067 if (! CONST_STRNEQ (symbols[i]->name, U ("_head_")))
1068 continue;
1070 if (pe_dll_extra_pe_debug)
1071 printf ("->%s\n", symbols[i]->name);
1073 pe_data_import_dll = (char*) (symbols[i]->name +
1074 sizeof (U ("_head_")) - 1);
1075 break;
1076 }
1078 pe_walk_relocs_of_symbol (&link_info, undef->root.string,
1079 make_import_fixup);
1081 /* Let's differentiate it somehow from defined. */
1082 undef->type = bfd_link_hash_defweak;
1083 /* We replace original name with __imp_ prefixed, this
1084 1) may trash memory 2) leads to duplicate symbol generation.
1085 Still, IMHO it's better than having name poluted. */
1086 undef->root.string = sym->root.string;
1087 undef->u.def.value = sym->u.def.value;
1088 undef->u.def.section = sym->u.def.section;
1089 }
1090 }
1091 }
1092 }
1094 static bfd_boolean
1095 pr_sym (struct bfd_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
1096 {
1097 if (pe_dll_extra_pe_debug)
1098 printf ("+%s\n", h->string);
1100 return TRUE;
1101 }
1102 #endif /* DLL_SUPPORT */
1104 static void
1105 debug_section_p (bfd *abfd ATTRIBUTE_UNUSED, asection *sect, void *obj)
1106 {
1107 int *found = (int *) obj;
1108 if (strncmp (".debug_", sect->name, sizeof (".debug_") - 1) == 0)
1109 *found = 1;
1110 }
1112 static void
1113 gld_${EMULATION_NAME}_after_open (void)
1114 {
1115 #ifdef DLL_SUPPORT
1116 if (pe_dll_extra_pe_debug)
1117 {
1118 bfd *a;
1119 struct bfd_link_hash_entry *sym;
1121 printf ("%s()\n", __FUNCTION__);
1123 for (sym = link_info.hash->undefs; sym; sym=sym->u.undef.next)
1124 printf ("-%s\n", sym->root.string);
1125 bfd_hash_traverse (&link_info.hash->table, pr_sym, NULL);
1127 for (a = link_info.input_bfds; a; a = a->link_next)
1128 printf ("*%s\n",a->filename);
1129 }
1130 #endif
1132 /* Pass the wacky PE command line options into the output bfd.
1133 FIXME: This should be done via a function, rather than by
1134 including an internal BFD header. */
1136 if (coff_data (link_info.output_bfd) == NULL
1137 || coff_data (link_info.output_bfd)->pe == 0)
1138 einfo (_("%F%P: cannot perform PE operations on non PE output file '%B'.\n"),
1139 link_info.output_bfd);
1141 pe_data (link_info.output_bfd)->pe_opthdr = pe;
1142 pe_data (link_info.output_bfd)->dll = init[DLLOFF].value;
1143 pe_data (link_info.output_bfd)->real_flags |= real_flags;
1145 /* At this point we must decide whether to use long section names
1146 in the output or not. If the user hasn't explicitly specified
1147 on the command line, we leave it to the default for the format
1148 (object files yes, image files no), except if there is debug
1149 information present; GDB relies on the long section names to
1150 find it, so enable it in that case. */
1151 if (pe_use_coff_long_section_names < 0 && link_info.strip == strip_none)
1152 {
1153 /* Iterate over all sections of all input BFDs, checking
1154 for any that begin 'debug_' and are long names. */
1155 LANG_FOR_EACH_INPUT_STATEMENT (is)
1156 {
1157 int found_debug = 0;
1158 bfd_map_over_sections (is->the_bfd, debug_section_p, &found_debug);
1159 if (found_debug)
1160 {
1161 pe_use_coff_long_section_names = 1;
1162 break;
1163 }
1164 }
1165 }
1167 pe_output_file_set_long_section_names (link_info.output_bfd);
1169 #ifdef DLL_SUPPORT
1170 if (pe_enable_stdcall_fixup) /* -1=warn or 1=disable */
1171 pe_fixup_stdcalls ();
1173 pe_process_import_defs (link_info.output_bfd, &link_info);
1175 pe_find_data_imports ();
1177 #if defined (TARGET_IS_i386pe) \
1178 || defined (TARGET_IS_armpe) \
1179 || defined (TARGET_IS_arm_epoc_pe) \
1180 || defined (TARGET_IS_arm_wince_pe)
1181 if (!link_info.relocatable)
1182 pe_dll_build_sections (link_info.output_bfd, &link_info);
1183 #else
1184 if (link_info.shared)
1185 pe_dll_build_sections (link_info.output_bfd, &link_info);
1186 else
1187 pe_exe_build_sections (link_info.output_bfd, &link_info);
1188 #endif
1189 #endif /* DLL_SUPPORT */
1191 #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe) || defined(TARGET_IS_arm_wince_pe)
1192 if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL)
1193 {
1194 /* The arm backend needs special fields in the output hash structure.
1195 These will only be created if the output format is an arm format,
1196 hence we do not support linking and changing output formats at the
1197 same time. Use a link followed by objcopy to change output formats. */
1198 einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
1199 return;
1200 }
1201 {
1202 /* Find a BFD that can hold the interworking stubs. */
1203 LANG_FOR_EACH_INPUT_STATEMENT (is)
1204 {
1205 if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
1206 break;
1207 }
1208 }
1209 #endif
1211 {
1212 /* This next chunk of code tries to detect the case where you have
1213 two import libraries for the same DLL (specifically,
1214 symbolically linking libm.a and libc.a in cygwin to
1215 libcygwin.a). In those cases, it's possible for function
1216 thunks from the second implib to be used but without the
1217 head/tail objects, causing an improper import table. We detect
1218 those cases and rename the "other" import libraries to match
1219 the one the head/tail come from, so that the linker will sort
1220 things nicely and produce a valid import table. */
1222 LANG_FOR_EACH_INPUT_STATEMENT (is)
1223 {
1224 if (is->the_bfd->my_archive)
1225 {
1226 int idata2 = 0, reloc_count=0, is_imp = 0;
1227 asection *sec;
1229 /* See if this is an import library thunk. */
1230 for (sec = is->the_bfd->sections; sec; sec = sec->next)
1231 {
1232 if (strcmp (sec->name, ".idata\$2") == 0)
1233 idata2 = 1;
1234 if (CONST_STRNEQ (sec->name, ".idata\$"))
1235 is_imp = 1;
1236 reloc_count += sec->reloc_count;
1237 }
1239 if (is_imp && !idata2 && reloc_count)
1240 {
1241 /* It is, look for the reference to head and see if it's
1242 from our own library. */
1243 for (sec = is->the_bfd->sections; sec; sec = sec->next)
1244 {
1245 int i;
1246 long relsize;
1247 asymbol **symbols;
1248 arelent **relocs;
1249 int nrelocs;
1251 relsize = bfd_get_reloc_upper_bound (is->the_bfd, sec);
1252 if (relsize < 1)
1253 break;
1255 if (!bfd_generic_link_read_symbols (is->the_bfd))
1256 {
1257 einfo (_("%B%F: could not read symbols: %E\n"),
1258 is->the_bfd);
1259 return;
1260 }
1261 symbols = bfd_get_outsymbols (is->the_bfd);
1263 relocs = (arelent **) xmalloc ((size_t) relsize);
1264 nrelocs = bfd_canonicalize_reloc (is->the_bfd, sec,
1265 relocs, symbols);
1266 if (nrelocs < 0)
1267 {
1268 free (relocs);
1269 einfo ("%X%P: unable to process relocs: %E\n");
1270 return;
1271 }
1273 for (i = 0; i < nrelocs; i++)
1274 {
1275 struct bfd_symbol *s;
1276 struct bfd_link_hash_entry * blhe;
1277 char *other_bfd_filename;
1278 char *n;
1280 s = (relocs[i]->sym_ptr_ptr)[0];
1282 if (s->flags & BSF_LOCAL)
1283 continue;
1285 /* Thunk section with reloc to another bfd. */
1286 blhe = bfd_link_hash_lookup (link_info.hash,
1287 s->name,
1288 FALSE, FALSE, TRUE);
1290 if (blhe == NULL
1291 || blhe->type != bfd_link_hash_defined)
1292 continue;
1294 other_bfd_filename
1295 = blhe->u.def.section->owner->my_archive
1296 ? bfd_get_filename (blhe->u.def.section->owner->my_archive)
1297 : bfd_get_filename (blhe->u.def.section->owner);
1299 if (strcmp (bfd_get_filename (is->the_bfd->my_archive),
1300 other_bfd_filename) == 0)
1301 continue;
1303 /* Rename this implib to match the other one. */
1304 n = xmalloc (strlen (other_bfd_filename) + 1);
1305 strcpy (n, other_bfd_filename);
1306 is->the_bfd->my_archive->filename = n;
1307 }
1309 free (relocs);
1310 /* Note - we do not free the symbols,
1311 they are now cached in the BFD. */
1312 }
1313 }
1314 }
1315 }
1316 }
1318 {
1319 int is_ms_arch = 0;
1320 bfd *cur_arch = 0;
1321 lang_input_statement_type *is2;
1322 lang_input_statement_type *is3;
1324 /* Careful - this is a shell script. Watch those dollar signs! */
1325 /* Microsoft import libraries have every member named the same,
1326 and not in the right order for us to link them correctly. We
1327 must detect these and rename the members so that they'll link
1328 correctly. There are three types of objects: the head, the
1329 thunks, and the sentinel(s). The head is easy; it's the one
1330 with idata2. We assume that the sentinels won't have relocs,
1331 and the thunks will. It's easier than checking the symbol
1332 table for external references. */
1333 LANG_FOR_EACH_INPUT_STATEMENT (is)
1334 {
1335 if (is->the_bfd->my_archive)
1336 {
1337 char *pnt;
1338 bfd *arch = is->the_bfd->my_archive;
1340 if (cur_arch != arch)
1341 {
1342 cur_arch = arch;
1343 is_ms_arch = 1;
1345 for (is3 = is;
1346 is3 && is3->the_bfd->my_archive == arch;
1347 is3 = (lang_input_statement_type *) is3->next)
1348 {
1349 /* A MS dynamic import library can also contain static
1350 members, so look for the first element with a .dll
1351 extension, and use that for the remainder of the
1352 comparisons. */
1353 pnt = strrchr (is3->the_bfd->filename, '.');
1354 if (pnt != NULL && strcmp (pnt, ".dll") == 0)
1355 break;
1356 }
1358 if (is3 == NULL)
1359 is_ms_arch = 0;
1360 else
1361 {
1362 /* OK, found one. Now look to see if the remaining
1363 (dynamic import) members use the same name. */
1364 for (is2 = is;
1365 is2 && is2->the_bfd->my_archive == arch;
1366 is2 = (lang_input_statement_type *) is2->next)
1367 {
1368 /* Skip static members, ie anything with a .obj
1369 extension. */
1370 pnt = strrchr (is2->the_bfd->filename, '.');
1371 if (pnt != NULL && strcmp (pnt, ".obj") == 0)
1372 continue;
1374 if (strcmp (is3->the_bfd->filename,
1375 is2->the_bfd->filename))
1376 {
1377 is_ms_arch = 0;
1378 break;
1379 }
1380 }
1381 }
1382 }
1384 /* This fragment might have come from an .obj file in a Microsoft
1385 import, and not an actual import record. If this is the case,
1386 then leave the filename alone. */
1387 pnt = strrchr (is->the_bfd->filename, '.');
1389 if (is_ms_arch && (strcmp (pnt, ".dll") == 0))
1390 {
1391 int idata2 = 0, reloc_count=0;
1392 asection *sec;
1393 char *new_name, seq;
1395 for (sec = is->the_bfd->sections; sec; sec = sec->next)
1396 {
1397 if (strcmp (sec->name, ".idata\$2") == 0)
1398 idata2 = 1;
1399 reloc_count += sec->reloc_count;
1400 }
1402 if (idata2) /* .idata2 is the TOC */
1403 seq = 'a';
1404 else if (reloc_count > 0) /* thunks */
1405 seq = 'b';
1406 else /* sentinel */
1407 seq = 'c';
1409 new_name = xmalloc (strlen (is->the_bfd->filename) + 3);
1410 sprintf (new_name, "%s.%c", is->the_bfd->filename, seq);
1411 is->the_bfd->filename = new_name;
1413 new_name = xmalloc (strlen (is->filename) + 3);
1414 sprintf (new_name, "%s.%c", is->filename, seq);
1415 is->filename = new_name;
1416 }
1417 }
1418 }
1419 }
1421 {
1422 /* The following chunk of code tries to identify jump stubs in
1423 import libraries which are dead code and eliminates them
1424 from the final link. For each exported symbol <sym>, there
1425 is a object file in the import library with a .text section
1426 and several .idata\$* sections. The .text section contains the
1427 symbol definition for <sym> which is a jump stub of the form
1428 jmp *__imp_<sym>. The .idata\$5 contains the symbol definition
1429 for __imp_<sym> which is the address of the slot for <sym> in
1430 the import address table. When a symbol is imported explicitly
1431 using __declspec(dllimport) declaration, the compiler generates
1432 a reference to __imp_<sym> which directly resolves to the
1433 symbol in .idata\$5, in which case the jump stub code is not
1434 needed. The following code tries to identify jump stub sections
1435 in import libraries which are not referred to by anyone and
1436 marks them for exclusion from the final link. */
1437 LANG_FOR_EACH_INPUT_STATEMENT (is)
1438 {
1439 if (is->the_bfd->my_archive)
1440 {
1441 int is_imp = 0;
1442 asection *sec, *stub_sec = NULL;
1444 /* See if this is an import library thunk. */
1445 for (sec = is->the_bfd->sections; sec; sec = sec->next)
1446 {
1447 if (strncmp (sec->name, ".idata\$", 7) == 0)
1448 is_imp = 1;
1449 /* The section containing the jmp stub has code
1450 and has a reloc. */
1451 if ((sec->flags & SEC_CODE) && sec->reloc_count)
1452 stub_sec = sec;
1453 }
1455 if (is_imp && stub_sec)
1456 {
1457 asymbol **symbols;
1458 long nsyms, src_count;
1459 struct bfd_link_hash_entry * blhe;
1461 if (!bfd_generic_link_read_symbols (is->the_bfd))
1462 {
1463 einfo (_("%B%F: could not read symbols: %E\n"),
1464 is->the_bfd);
1465 return;
1466 }
1467 symbols = bfd_get_outsymbols (is->the_bfd);
1468 nsyms = bfd_get_symcount (is->the_bfd);
1470 for (src_count = 0; src_count < nsyms; src_count++)
1471 {
1472 if (symbols[src_count]->section->id == stub_sec->id)
1473 {
1474 /* This symbol belongs to the section containing
1475 the stub. */
1476 blhe = bfd_link_hash_lookup (link_info.hash,
1477 symbols[src_count]->name,
1478 FALSE, FALSE, TRUE);
1479 /* If the symbol in the stub section has no other
1480 undefined references, exclude the stub section
1481 from the final link. */
1482 if (blhe && (blhe->type == bfd_link_hash_defined)
1483 && (blhe->u.undef.next == NULL))
1484 stub_sec->flags |= SEC_EXCLUDE;
1485 }
1486 }
1487 }
1488 }
1489 }
1490 }
1491 }
1492 \f
1493 static void
1494 gld_${EMULATION_NAME}_before_allocation (void)
1495 {
1496 #ifdef TARGET_IS_ppcpe
1497 /* Here we rummage through the found bfds to collect toc information. */
1498 {
1499 LANG_FOR_EACH_INPUT_STATEMENT (is)
1500 {
1501 if (!ppc_process_before_allocation (is->the_bfd, &link_info))
1502 {
1503 /* xgettext:c-format */
1504 einfo (_("Errors encountered processing file %s\n"), is->filename);
1505 }
1506 }
1507 }
1509 /* We have seen it all. Allocate it, and carry on. */
1510 ppc_allocate_toc_section (&link_info);
1511 #endif /* TARGET_IS_ppcpe */
1513 #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe) || defined(TARGET_IS_arm_wince_pe)
1514 /* FIXME: we should be able to set the size of the interworking stub
1515 section.
1517 Here we rummage through the found bfds to collect glue
1518 information. FIXME: should this be based on a command line
1519 option? krk@cygnus.com. */
1520 {
1521 LANG_FOR_EACH_INPUT_STATEMENT (is)
1522 {
1523 if (! bfd_arm_process_before_allocation
1524 (is->the_bfd, & link_info, support_old_code))
1525 {
1526 /* xgettext:c-format */
1527 einfo (_("Errors encountered processing file %s for interworking\n"),
1528 is->filename);
1529 }
1530 }
1531 }
1533 /* We have seen it all. Allocate it, and carry on. */
1534 bfd_arm_allocate_interworking_sections (& link_info);
1535 #endif /* TARGET_IS_armpe || TARGET_IS_arm_epoc_pe || TARGET_IS_arm_wince_pe */
1537 before_allocation_default ();
1538 }
1539 \f
1540 #ifdef DLL_SUPPORT
1541 /* This is called when an input file isn't recognized as a BFD. We
1542 check here for .DEF files and pull them in automatically. */
1544 static int
1545 saw_option (char *option)
1546 {
1547 int i;
1549 for (i = 0; init[i].ptr; i++)
1550 if (strcmp (init[i].symbol, option) == 0)
1551 return init[i].inited;
1552 return 0;
1553 }
1554 #endif /* DLL_SUPPORT */
1556 static bfd_boolean
1557 gld_${EMULATION_NAME}_unrecognized_file (lang_input_statement_type *entry ATTRIBUTE_UNUSED)
1558 {
1559 #ifdef DLL_SUPPORT
1560 const char *ext = entry->filename + strlen (entry->filename) - 4;
1562 if (strcmp (ext, ".def") == 0 || strcmp (ext, ".DEF") == 0)
1563 {
1564 pe_def_file = def_file_parse (entry->filename, pe_def_file);
1566 if (pe_def_file)
1567 {
1568 int i, buflen=0, len;
1569 char *buf;
1571 for (i = 0; i < pe_def_file->num_exports; i++)
1572 {
1573 len = strlen (pe_def_file->exports[i].internal_name);
1574 if (buflen < len + 2)
1575 buflen = len + 2;
1576 }
1578 buf = (char *) xmalloc (buflen);
1580 for (i = 0; i < pe_def_file->num_exports; i++)
1581 {
1582 struct bfd_link_hash_entry *h;
1584 sprintf (buf, "%s%s", U (""), pe_def_file->exports[i].internal_name);
1586 h = bfd_link_hash_lookup (link_info.hash, buf, TRUE, TRUE, TRUE);
1587 if (h == (struct bfd_link_hash_entry *) NULL)
1588 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
1589 if (h->type == bfd_link_hash_new)
1590 {
1591 h->type = bfd_link_hash_undefined;
1592 h->u.undef.abfd = NULL;
1593 bfd_link_add_undef (link_info.hash, h);
1594 }
1595 }
1596 free (buf);
1598 /* def_file_print (stdout, pe_def_file); */
1599 if (pe_def_file->is_dll == 1)
1600 link_info.shared = 1;
1602 if (pe_def_file->base_address != (bfd_vma)(-1))
1603 {
1604 pe.ImageBase
1605 = pe_data (link_info.output_bfd)->pe_opthdr.ImageBase
1606 = init[IMAGEBASEOFF].value
1607 = pe_def_file->base_address;
1608 init[IMAGEBASEOFF].inited = 1;
1609 if (image_base_statement)
1610 image_base_statement->exp = exp_assop ('=', "__image_base__",
1611 exp_intop (pe.ImageBase));
1612 }
1614 if (pe_def_file->stack_reserve != -1
1615 && ! saw_option ("__size_of_stack_reserve__"))
1616 {
1617 pe.SizeOfStackReserve = pe_def_file->stack_reserve;
1618 if (pe_def_file->stack_commit != -1)
1619 pe.SizeOfStackCommit = pe_def_file->stack_commit;
1620 }
1621 if (pe_def_file->heap_reserve != -1
1622 && ! saw_option ("__size_of_heap_reserve__"))
1623 {
1624 pe.SizeOfHeapReserve = pe_def_file->heap_reserve;
1625 if (pe_def_file->heap_commit != -1)
1626 pe.SizeOfHeapCommit = pe_def_file->heap_commit;
1627 }
1628 return TRUE;
1629 }
1630 }
1631 #endif
1632 return FALSE;
1633 }
1635 static bfd_boolean
1636 gld_${EMULATION_NAME}_recognized_file (lang_input_statement_type *entry ATTRIBUTE_UNUSED)
1637 {
1638 #ifdef DLL_SUPPORT
1639 #ifdef TARGET_IS_i386pe
1640 pe_dll_id_target ("pei-i386");
1641 #endif
1642 #ifdef TARGET_IS_shpe
1643 pe_dll_id_target ("pei-shl");
1644 #endif
1645 #ifdef TARGET_IS_mipspe
1646 pe_dll_id_target ("pei-mips");
1647 #endif
1648 #ifdef TARGET_IS_armpe
1649 pe_dll_id_target ("pei-arm-little");
1650 #endif
1651 #ifdef TARGET_IS_arm_epoc_pe
1652 pe_dll_id_target ("epoc-pei-arm-little");
1653 #endif
1654 #ifdef TARGET_IS_arm_wince_pe
1655 pe_dll_id_target ("pei-arm-wince-little");
1656 #endif
1657 if (pe_bfd_is_dll (entry->the_bfd))
1658 return pe_implied_import_dll (entry->filename);
1659 #endif
1660 return FALSE;
1661 }
1663 static void
1664 gld_${EMULATION_NAME}_finish (void)
1665 {
1666 #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe) || defined(TARGET_IS_arm_wince_pe)
1667 struct bfd_link_hash_entry * h;
1669 if (thumb_entry_symbol != NULL)
1670 {
1671 h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
1672 FALSE, FALSE, TRUE);
1674 if (h != (struct bfd_link_hash_entry *) NULL
1675 && (h->type == bfd_link_hash_defined
1676 || h->type == bfd_link_hash_defweak)
1677 && h->u.def.section->output_section != NULL)
1678 {
1679 static char buffer[32];
1680 bfd_vma val;
1682 /* Special procesing is required for a Thumb entry symbol. The
1683 bottom bit of its address must be set. */
1684 val = (h->u.def.value
1685 + bfd_get_section_vma (link_info.output_bfd,
1686 h->u.def.section->output_section)
1687 + h->u.def.section->output_offset);
1689 val |= 1;
1691 /* Now convert this value into a string and store it in entry_symbol
1692 where the lang_finish() function will pick it up. */
1693 buffer[0] = '0';
1694 buffer[1] = 'x';
1696 sprintf_vma (buffer + 2, val);
1698 if (entry_symbol.name != NULL && entry_from_cmdline)
1699 einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
1700 thumb_entry_symbol, entry_symbol.name);
1701 entry_symbol.name = buffer;
1702 }
1703 else
1704 einfo (_("%P: warning: cannot find thumb start symbol %s\n"), thumb_entry_symbol);
1705 }
1706 #endif /* defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe) || defined(TARGET_IS_arm_wince_pe) */
1708 finish_default ();
1710 #ifdef DLL_SUPPORT
1711 if (link_info.shared
1712 #if !defined(TARGET_IS_shpe) && !defined(TARGET_IS_mipspe)
1713 || (!link_info.relocatable && pe_def_file->num_exports != 0)
1714 #endif
1715 )
1716 {
1717 pe_dll_fill_sections (link_info.output_bfd, &link_info);
1718 if (pe_implib_filename)
1719 pe_dll_generate_implib (pe_def_file, pe_implib_filename, &link_info);
1720 }
1721 #if defined(TARGET_IS_shpe) || defined(TARGET_IS_mipspe)
1722 /* ARM doesn't need relocs. */
1723 else
1724 {
1725 pe_exe_fill_sections (link_info.output_bfd, &link_info);
1726 }
1727 #endif
1729 if (pe_out_def_filename)
1730 pe_dll_generate_def_file (pe_out_def_filename);
1731 #endif /* DLL_SUPPORT */
1733 /* I don't know where .idata gets set as code, but it shouldn't be. */
1734 {
1735 asection *asec = bfd_get_section_by_name (link_info.output_bfd, ".idata");
1737 if (asec)
1738 {
1739 asec->flags &= ~SEC_CODE;
1740 asec->flags |= SEC_DATA;
1741 }
1742 }
1743 }
1745 \f
1746 /* Place an orphan section.
1748 We use this to put sections in a reasonable place in the file, and
1749 to ensure that they are aligned as required.
1751 We handle grouped sections here as well. A section named .foo\$nn
1752 goes into the output section .foo. All grouped sections are sorted
1753 by name.
1755 Grouped sections for the default sections are handled by the
1756 default linker script using wildcards, and are sorted by
1757 sort_sections. */
1759 static lang_output_section_statement_type *
1760 gld_${EMULATION_NAME}_place_orphan (asection *s,
1761 const char *secname,
1762 int constraint)
1763 {
1764 const char *orig_secname = secname;
1765 char *dollar = NULL;
1766 lang_output_section_statement_type *os;
1767 lang_statement_list_type add_child;
1769 /* Look through the script to see where to place this section. */
1770 if (!link_info.relocatable
1771 && (dollar = strchr (secname, '\$')) != NULL)
1772 {
1773 size_t len = dollar - secname;
1774 char *newname = xmalloc (len + 1);
1775 memcpy (newname, secname, len);
1776 newname[len] = '\0';
1777 secname = newname;
1778 }
1780 lang_list_init (&add_child);
1782 if (constraint == 0
1783 && (os = lang_output_section_find (secname)) != NULL
1784 && os->bfd_section != NULL
1785 && (os->bfd_section->flags == 0
1786 || ((s->flags ^ os->bfd_section->flags)
1787 & (SEC_LOAD | SEC_ALLOC)) == 0))
1788 {
1789 /* We already have an output section statement with this
1790 name, and its bfd section has compatible flags.
1791 If the section already exists but does not have any flags set,
1792 then it has been created by the linker, probably as a result of
1793 a --section-start command line switch. */
1794 lang_add_section (&add_child, s, os);
1795 }
1796 else
1797 {
1798 static struct orphan_save hold[] =
1799 {
1800 { ".text",
1801 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1802 0, 0, 0, 0 },
1803 { ".rdata",
1804 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1805 0, 0, 0, 0 },
1806 { ".data",
1807 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1808 0, 0, 0, 0 },
1809 { ".bss",
1810 SEC_ALLOC,
1811 0, 0, 0, 0 }
1812 };
1813 enum orphan_save_index
1814 {
1815 orphan_text = 0,
1816 orphan_rodata,
1817 orphan_data,
1818 orphan_bss
1819 };
1820 static int orphan_init_done = 0;
1821 struct orphan_save *place;
1822 lang_output_section_statement_type *after;
1823 etree_type *address;
1825 if (!orphan_init_done)
1826 {
1827 struct orphan_save *ho;
1828 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1829 if (ho->name != NULL)
1830 {
1831 ho->os = lang_output_section_find (ho->name);
1832 if (ho->os != NULL && ho->os->flags == 0)
1833 ho->os->flags = ho->flags;
1834 }
1835 orphan_init_done = 1;
1836 }
1838 /* Try to put the new output section in a reasonable place based
1839 on the section name and section flags. */
1841 place = NULL;
1842 if ((s->flags & SEC_ALLOC) == 0)
1843 ;
1844 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
1845 place = &hold[orphan_bss];
1846 else if ((s->flags & SEC_READONLY) == 0)
1847 place = &hold[orphan_data];
1848 else if ((s->flags & SEC_CODE) == 0)
1849 place = &hold[orphan_rodata];
1850 else
1851 place = &hold[orphan_text];
1853 after = NULL;
1854 if (place != NULL)
1855 {
1856 if (place->os == NULL)
1857 place->os = lang_output_section_find (place->name);
1858 after = place->os;
1859 if (after == NULL)
1860 after = lang_output_section_find_by_flags (s, &place->os, NULL);
1861 if (after == NULL)
1862 /* *ABS* is always the first output section statement. */
1863 after = (&lang_output_section_statement.head
1864 ->output_section_statement);
1865 }
1867 /* All sections in an executable must be aligned to a page boundary. */
1868 address = exp_unop (ALIGN_K, exp_nameop (NAME, "__section_alignment__"));
1869 os = lang_insert_orphan (s, secname, constraint, after, place, address,
1870 &add_child);
1871 }
1873 {
1874 lang_statement_union_type **pl = &os->children.head;
1876 if (dollar != NULL)
1877 {
1878 bfd_boolean found_dollar;
1880 /* The section name has a '\$'. Sort it with the other '\$'
1881 sections. */
1882 found_dollar = FALSE;
1883 for ( ; *pl != NULL; pl = &(*pl)->header.next)
1884 {
1885 lang_input_section_type *ls;
1886 const char *lname;
1888 if ((*pl)->header.type != lang_input_section_enum)
1889 continue;
1891 ls = &(*pl)->input_section;
1893 lname = bfd_get_section_name (ls->section->owner, ls->section);
1894 if (strchr (lname, '\$') == NULL)
1895 {
1896 if (found_dollar)
1897 break;
1898 }
1899 else
1900 {
1901 found_dollar = TRUE;
1902 if (strcmp (orig_secname, lname) < 0)
1903 break;
1904 }
1905 }
1906 }
1908 if (add_child.head != NULL)
1909 {
1910 add_child.head->header.next = *pl;
1911 *pl = add_child.head;
1912 }
1913 }
1915 return os;
1916 }
1918 static bfd_boolean
1919 gld_${EMULATION_NAME}_open_dynamic_archive
1920 (const char *arch ATTRIBUTE_UNUSED, search_dirs_type *search,
1921 lang_input_statement_type *entry)
1922 {
1923 static const struct
1924 {
1925 const char * format;
1926 bfd_boolean use_prefix;
1927 }
1928 libname_fmt [] =
1929 {
1930 /* Preferred explicit import library for dll's. */
1931 { "lib%s.dll.a", FALSE },
1932 /* Alternate explicit import library for dll's. */
1933 { "%s.dll.a", FALSE },
1934 /* "libfoo.a" could be either an import lib or a static lib.
1935 For backwards compatibility, libfoo.a needs to precede
1936 libfoo.dll and foo.dll in the search. */
1937 { "lib%s.a", FALSE },
1938 /* The 'native' spelling of an import lib name is "foo.lib". */
1939 { "%s.lib", FALSE },
1940 #ifdef DLL_SUPPORT
1941 /* Try "<prefix>foo.dll" (preferred dll name, if specified). */
1942 { "%s%s.dll", TRUE },
1943 #endif
1944 /* Try "libfoo.dll" (default preferred dll name). */
1945 { "lib%s.dll", FALSE },
1946 /* Finally try 'native' dll name "foo.dll". */
1947 { "%s.dll", FALSE },
1948 /* Note: If adding more formats to this table, make sure to check to
1949 see if their length is longer than libname_fmt[0].format, and if
1950 so, update the call to xmalloc() below. */
1951 { NULL, FALSE }
1952 };
1953 static unsigned int format_max_len = 0;
1954 const char * filename;
1955 char * full_string;
1956 char * base_string;
1957 unsigned int i;
1960 if (! entry->is_archive)
1961 return FALSE;
1963 filename = entry->filename;
1965 if (format_max_len == 0)
1966 /* We need to allow space in the memory that we are going to allocate
1967 for the characters in the format string. Since the format array is
1968 static we only need to calculate this information once. In theory
1969 this value could also be computed statically, but this introduces
1970 the possibility for a discrepancy and hence a possible memory
1971 corruption. The lengths we compute here will be too long because
1972 they will include any formating characters (%s) in the strings, but
1973 this will not matter. */
1974 for (i = 0; libname_fmt[i].format; i++)
1975 if (format_max_len < strlen (libname_fmt[i].format))
1976 format_max_len = strlen (libname_fmt[i].format);
1978 full_string = xmalloc (strlen (search->name)
1979 + strlen (filename)
1980 + format_max_len
1981 #ifdef DLL_SUPPORT
1982 + (pe_dll_search_prefix
1983 ? strlen (pe_dll_search_prefix) : 0)
1984 #endif
1985 /* Allow for the terminating NUL and for the path
1986 separator character that is inserted between
1987 search->name and the start of the format string. */
1988 + 2);
1990 sprintf (full_string, "%s/", search->name);
1991 base_string = full_string + strlen (full_string);
1993 for (i = 0; libname_fmt[i].format; i++)
1994 {
1995 #ifdef DLL_SUPPORT
1996 if (libname_fmt[i].use_prefix)
1997 {
1998 if (!pe_dll_search_prefix)
1999 continue;
2000 sprintf (base_string, libname_fmt[i].format, pe_dll_search_prefix, filename);
2001 }
2002 else
2003 #endif
2004 sprintf (base_string, libname_fmt[i].format, filename);
2006 if (ldfile_try_open_bfd (full_string, entry))
2007 break;
2008 }
2010 if (!libname_fmt[i].format)
2011 {
2012 free (full_string);
2013 return FALSE;
2014 }
2016 entry->filename = full_string;
2018 return TRUE;
2019 }
2021 static int
2022 gld_${EMULATION_NAME}_find_potential_libraries
2023 (char *name, lang_input_statement_type *entry)
2024 {
2025 return ldfile_open_file_search (name, entry, "", ".lib");
2026 }
2027 \f
2028 static char *
2029 gld_${EMULATION_NAME}_get_script (int *isfile)
2030 EOF
2031 # Scripts compiled in.
2032 # sed commands to quote an ld script as a C string.
2033 sc="-f stringify.sed"
2035 fragment <<EOF
2036 {
2037 *isfile = 0;
2039 if (link_info.relocatable && config.build_constructors)
2040 return
2041 EOF
2042 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
2043 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
2044 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2045 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2046 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2047 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2048 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2049 if test -n "$GENERATE_AUTO_IMPORT_SCRIPT" ; then
2050 echo ' ; else if (link_info.pei386_auto_import == 1) return' >> e${EMULATION_NAME}.c
2051 sed $sc ldscripts/${EMULATION_NAME}.xa >> e${EMULATION_NAME}.c
2052 fi
2053 echo ' ; else return' >> e${EMULATION_NAME}.c
2054 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2055 echo '; }' >> e${EMULATION_NAME}.c
2057 fragment <<EOF
2060 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2061 {
2062 gld_${EMULATION_NAME}_before_parse,
2063 syslib_default,
2064 hll_default,
2065 gld_${EMULATION_NAME}_after_parse,
2066 gld_${EMULATION_NAME}_after_open,
2067 after_allocation_default,
2068 set_output_arch_default,
2069 ldemul_default_target,
2070 gld_${EMULATION_NAME}_before_allocation,
2071 gld_${EMULATION_NAME}_get_script,
2072 "${EMULATION_NAME}",
2073 "${OUTPUT_FORMAT}",
2074 gld_${EMULATION_NAME}_finish,
2075 NULL, /* Create output section statements. */
2076 gld_${EMULATION_NAME}_open_dynamic_archive,
2077 gld_${EMULATION_NAME}_place_orphan,
2078 gld_${EMULATION_NAME}_set_symbols,
2079 NULL, /* parse_args */
2080 gld${EMULATION_NAME}_add_options,
2081 gld${EMULATION_NAME}_handle_option,
2082 gld_${EMULATION_NAME}_unrecognized_file,
2083 gld_${EMULATION_NAME}_list_options,
2084 gld_${EMULATION_NAME}_recognized_file,
2085 gld_${EMULATION_NAME}_find_potential_libraries,
2086 NULL /* new_vers_pattern. */
2087 };
2088 EOF