* emultempl/pe.em (gld_${EMULATION_NAME}_place_orphan): Defer
[deliverable/binutils-gdb.git] / ld / emultempl / pe.em
1 # This shell script emits a C file. -*- C -*-
2 # It does some substitutions.
3 rm -f e${EMULATION_NAME}.c
4 (echo;echo;echo;echo;echo)>e${EMULATION_NAME}.c # there, now line numbers match ;-)
5 cat >>e${EMULATION_NAME}.c <<EOF
6 /* This file is part of GLD, the Gnu Linker.
7 Copyright 1995, 96, 97, 98, 1999 Free Software Foundation, Inc.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22
23 /* For WINDOWS_NT */
24 /* The original file generated returned different default scripts depending
25 on whether certain switches were set, but these switches pertain to the
26 Linux system and that particular version of coff. In the NT case, we
27 only determine if the subsystem is console or windows in order to select
28 the correct entry point by default. */
29
30 #include "bfd.h"
31 #include "sysdep.h"
32 #include "bfdlink.h"
33 #include "getopt.h"
34 #include "libiberty.h"
35 #include "ld.h"
36 #include "ldmain.h"
37 #include "ldgram.h"
38 #include "ldexp.h"
39 #include "ldlang.h"
40 #include "ldemul.h"
41 #include "ldlex.h"
42 #include "ldmisc.h"
43 #include "ldctor.h"
44 #include "ldfile.h"
45 #include "coff/internal.h"
46
47 /* FIXME: This is a BFD internal header file, and we should not be
48 using it here. */
49 #include "../bfd/libcoff.h"
50
51 #include "deffile.h"
52 #include "pe-dll.h"
53
54 #define TARGET_IS_${EMULATION_NAME}
55
56 /* Permit the emulation parameters to override the default section
57 alignment by setting OVERRIDE_SECTION_ALIGNMENT. FIXME: This makes
58 it seem that include/coff/internal.h should not define
59 PE_DEF_SECTION_ALIGNMENT. */
60 #if PE_DEF_SECTION_ALIGNMENT != ${OVERRIDE_SECTION_ALIGNMENT:-PE_DEF_SECTION_ALIGNMENT}
61 #undef PE_DEF_SECTION_ALIGNMENT
62 #define PE_DEF_SECTION_ALIGNMENT ${OVERRIDE_SECTION_ALIGNMENT}
63 #endif
64
65 #if defined(TARGET_IS_i386pe)
66 #define DLL_SUPPORT
67 #endif
68
69 #define PE_DEF_SUBSYSTEM 3
70
71 #ifdef TARGET_IS_arm_epoc_pe
72 #define bfd_arm_pe_allocate_interworking_sections \
73 bfd_arm_epoc_pe_allocate_interworking_sections
74 #define bfd_arm_pe_get_bfd_for_interworking \
75 bfd_arm_epoc_pe_get_bfd_for_interworking
76 #define bfd_arm_pe_process_before_allocation \
77 bfd_arm_epoc_pe_process_before_allocation
78 #endif
79
80 static void gld_${EMULATION_NAME}_set_symbols PARAMS ((void));
81 static void gld_${EMULATION_NAME}_after_open PARAMS ((void));
82 static void gld_${EMULATION_NAME}_before_parse PARAMS ((void));
83 static void gld_${EMULATION_NAME}_after_parse PARAMS ((void));
84 static void gld_${EMULATION_NAME}_before_allocation PARAMS ((void));
85 static boolean gld_${EMULATION_NAME}_place_orphan
86 PARAMS ((lang_input_statement_type *, asection *));
87 static void gld${EMULATION_NAME}_place_section
88 PARAMS ((lang_statement_union_type *));
89 static char *gld_${EMULATION_NAME}_get_script PARAMS ((int *));
90 static int gld_${EMULATION_NAME}_parse_args PARAMS ((int, char **));
91 static void gld_${EMULATION_NAME}_finish PARAMS ((void));
92
93 static struct internal_extra_pe_aouthdr pe;
94 static int dll;
95 static int support_old_code = 0;
96 static char * thumb_entry_symbol = NULL;
97 static lang_assignment_statement_type *image_base_statement = 0;
98
99 static char *pe_out_def_filename = 0;
100 static int pe_enable_stdcall_fixup = -1; /* 0=disable 1=enable */
101 static char *pe_implib_filename = 0;
102
103 extern const char *output_filename;
104
105 static void
106 gld_${EMULATION_NAME}_before_parse()
107 {
108 output_filename = "${EXECUTABLE_NAME:-a.exe}";
109 ldfile_output_architecture = bfd_arch_${ARCH};
110 #ifdef DLL_SUPPORT
111 config.has_shared = 1;
112 #endif
113 }
114 \f
115 /* PE format extra command line options. */
116
117 /* Used for setting flags in the PE header. */
118 #define OPTION_BASE_FILE (300 + 1)
119 #define OPTION_DLL (OPTION_BASE_FILE + 1)
120 #define OPTION_FILE_ALIGNMENT (OPTION_DLL + 1)
121 #define OPTION_IMAGE_BASE (OPTION_FILE_ALIGNMENT + 1)
122 #define OPTION_MAJOR_IMAGE_VERSION (OPTION_IMAGE_BASE + 1)
123 #define OPTION_MAJOR_OS_VERSION (OPTION_MAJOR_IMAGE_VERSION + 1)
124 #define OPTION_MAJOR_SUBSYSTEM_VERSION (OPTION_MAJOR_OS_VERSION + 1)
125 #define OPTION_MINOR_IMAGE_VERSION (OPTION_MAJOR_SUBSYSTEM_VERSION + 1)
126 #define OPTION_MINOR_OS_VERSION (OPTION_MINOR_IMAGE_VERSION + 1)
127 #define OPTION_MINOR_SUBSYSTEM_VERSION (OPTION_MINOR_OS_VERSION + 1)
128 #define OPTION_SECTION_ALIGNMENT (OPTION_MINOR_SUBSYSTEM_VERSION + 1)
129 #define OPTION_STACK (OPTION_SECTION_ALIGNMENT + 1)
130 #define OPTION_SUBSYSTEM (OPTION_STACK + 1)
131 #define OPTION_HEAP (OPTION_SUBSYSTEM + 1)
132 #define OPTION_SUPPORT_OLD_CODE (OPTION_HEAP + 1)
133 #define OPTION_OUT_DEF (OPTION_SUPPORT_OLD_CODE + 1)
134 #define OPTION_EXPORT_ALL (OPTION_OUT_DEF + 1)
135 #define OPTION_EXCLUDE_SYMBOLS (OPTION_EXPORT_ALL + 1)
136 #define OPTION_KILL_ATS (OPTION_EXCLUDE_SYMBOLS + 1)
137 #define OPTION_STDCALL_ALIASES (OPTION_KILL_ATS + 1)
138 #define OPTION_ENABLE_STDCALL_FIXUP (OPTION_STDCALL_ALIASES + 1)
139 #define OPTION_DISABLE_STDCALL_FIXUP (OPTION_ENABLE_STDCALL_FIXUP + 1)
140 #define OPTION_IMPLIB_FILENAME (OPTION_DISABLE_STDCALL_FIXUP + 1)
141 #define OPTION_THUMB_ENTRY (OPTION_IMPLIB_FILENAME + 1)
142
143 static struct option longopts[] =
144 {
145 /* PE options */
146 {"base-file", required_argument, NULL, OPTION_BASE_FILE},
147 {"dll", no_argument, NULL, OPTION_DLL},
148 {"file-alignment", required_argument, NULL, OPTION_FILE_ALIGNMENT},
149 {"heap", required_argument, NULL, OPTION_HEAP},
150 {"image-base", required_argument, NULL, OPTION_IMAGE_BASE},
151 {"major-image-version", required_argument, NULL, OPTION_MAJOR_IMAGE_VERSION},
152 {"major-os-version", required_argument, NULL, OPTION_MAJOR_OS_VERSION},
153 {"major-subsystem-version", required_argument, NULL, OPTION_MAJOR_SUBSYSTEM_VERSION},
154 {"minor-image-version", required_argument, NULL, OPTION_MINOR_IMAGE_VERSION},
155 {"minor-os-version", required_argument, NULL, OPTION_MINOR_OS_VERSION},
156 {"minor-subsystem-version", required_argument, NULL, OPTION_MINOR_SUBSYSTEM_VERSION},
157 {"section-alignment", required_argument, NULL, OPTION_SECTION_ALIGNMENT},
158 {"stack", required_argument, NULL, OPTION_STACK},
159 {"subsystem", required_argument, NULL, OPTION_SUBSYSTEM},
160 {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE},
161 {"thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
162 #ifdef DLL_SUPPORT
163 /* getopt allows abbreviations, so we do this to stop it from treating -o
164 as an abbreviation for this option */
165 {"output-def", required_argument, NULL, OPTION_OUT_DEF},
166 {"output-def", required_argument, NULL, OPTION_OUT_DEF},
167 {"export-all-symbols", no_argument, NULL, OPTION_EXPORT_ALL},
168 {"exclude-symbols", required_argument, NULL, OPTION_EXCLUDE_SYMBOLS},
169 {"kill-at", no_argument, NULL, OPTION_KILL_ATS},
170 {"add-stdcall-alias", no_argument, NULL, OPTION_STDCALL_ALIASES},
171 {"enable-stdcall-fixup", no_argument, NULL, OPTION_ENABLE_STDCALL_FIXUP},
172 {"disable-stdcall-fixup", no_argument, NULL, OPTION_DISABLE_STDCALL_FIXUP},
173 {"out-implib", required_argument, NULL, OPTION_IMPLIB_FILENAME},
174 #endif
175 {NULL, no_argument, NULL, 0}
176 };
177
178
179 /* PE/WIN32; added routines to get the subsystem type, heap and/or stack
180 parameters which may be input from the command line */
181
182 typedef struct
183 {
184 void *ptr;
185 int size;
186 int value;
187 char *symbol;
188 int inited;
189 } definfo;
190
191 #define D(field,symbol,def) {&pe.field,sizeof(pe.field), def, symbol,0}
192
193 static definfo init[] =
194 {
195 /* imagebase must be first */
196 #define IMAGEBASEOFF 0
197 D(ImageBase,"__image_base__", NT_EXE_IMAGE_BASE),
198 #define DLLOFF 1
199 {&dll, sizeof(dll), 0, "__dll__", 0},
200 D(SectionAlignment,"__section_alignment__", PE_DEF_SECTION_ALIGNMENT),
201 D(FileAlignment,"__file_alignment__", PE_DEF_FILE_ALIGNMENT),
202 D(MajorOperatingSystemVersion,"__major_os_version__", 4),
203 D(MinorOperatingSystemVersion,"__minor_os_version__", 0),
204 D(MajorImageVersion,"__major_image_version__", 1),
205 D(MinorImageVersion,"__minor_image_version__", 0),
206 D(MajorSubsystemVersion,"__major_subsystem_version__", 4),
207 D(MinorSubsystemVersion,"__minor_subsystem_version__", 0),
208 D(Subsystem,"__subsystem__", ${SUBSYSTEM}),
209 D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x2000000),
210 D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000),
211 D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000),
212 D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000),
213 D(LoaderFlags,"__loader_flags__", 0x0),
214 { NULL, 0, 0, NULL, 0 }
215 };
216
217 static void
218 gld_${EMULATION_NAME}_list_options (file)
219 FILE * file;
220 {
221 fprintf (file, _(" --base_file <basefile> Generate a base file for relocatable DLLs\n"));
222 fprintf (file, _(" --dll Set image base to the default for DLLs\n"));
223 fprintf (file, _(" --file-alignment <size> Set file alignment\n"));
224 fprintf (file, _(" --heap <size> Set initial size of the heap\n"));
225 fprintf (file, _(" --image-base <address> Set start address of the executable\n"));
226 fprintf (file, _(" --major-image-version <number> Set version number of the executable\n"));
227 fprintf (file, _(" --major-os-version <number> Set minimum required OS version\n"));
228 fprintf (file, _(" --major-subsystem-version <number> Set minimum required OS subsystem version\n"));
229 fprintf (file, _(" --minor-image-version <number> Set revision number of the executable\n"));
230 fprintf (file, _(" --minor-os-version <number> Set minimum required OS revision\n"));
231 fprintf (file, _(" --minor-subsystem-version <number> Set minimum required OS subsystem revision\n"));
232 fprintf (file, _(" --section-alignment <size> Set section alignment\n"));
233 fprintf (file, _(" --stack <size> Set size of the initial stack\n"));
234 fprintf (file, _(" --subsystem <name>[:<version>] Set required OS subsystem [& version]\n"));
235 fprintf (file, _(" --support-old-code Support interworking with old code\n"));
236 fprintf (file, _(" --thumb-entry=<symbol> Set the entry point to be Thumb <symbol>\n"));
237 #ifdef DLL_SUPPORT
238 fprintf (file, _(" --add-stdcall-alias Export symbols with and without @nn\n"));
239 fprintf (file, _(" --disable-stdcall-fixup Don't link _sym to _sym@nn\n"));
240 fprintf (file, _(" --enable-stdcall-fixup Link _sym to _sym@nn without warnings\n"));
241 fprintf (file, _(" --exclude-symbols sym,sym,... Exclude symbols from automatic export\n"));
242 fprintf (file, _(" --export-all-symbols Automatically export all globals to DLL\n"));
243 fprintf (file, _(" --kill-at Remove @nn from exported symbols\n"));
244 fprintf (file, _(" --out-implib <file> Generate import library\n"));
245 fprintf (file, _(" --output-def <file> Generate a .DEF file for the built DLL\n"));
246 #endif
247 }
248
249 static void
250 set_pe_name (name, val)
251 char *name;
252 long val;
253 {
254 int i;
255 /* Find the name and set it. */
256 for (i = 0; init[i].ptr; i++)
257 {
258 if (strcmp (name, init[i].symbol) == 0)
259 {
260 init[i].value = val;
261 init[i].inited = 1;
262 return;
263 }
264 }
265 abort();
266 }
267
268
269 static void
270 set_pe_subsystem ()
271 {
272 const char *sver;
273 int len;
274 int i;
275 static const struct
276 {
277 const char *name;
278 const int value;
279 const char *entry;
280 }
281 v[] =
282 {
283 { "native", 1, "NtProcessStartup" },
284 { "windows", 2, "WinMainCRTStartup" },
285 { "console", 3, "mainCRTStartup" },
286 #if 0
287 /* The Microsoft linker does not recognize this. */
288 { "os2", 5, "" },
289 #endif
290 { "posix", 7, "__PosixProcessStartup"},
291 { 0, 0, 0 }
292 };
293
294 sver = strchr (optarg, ':');
295 if (sver == NULL)
296 len = strlen (optarg);
297 else
298 {
299 char *end;
300
301 len = sver - optarg;
302 set_pe_name ("__major_subsystem_version__",
303 strtoul (sver + 1, &end, 0));
304 if (*end == '.')
305 set_pe_name ("__minor_subsystem_version__",
306 strtoul (end + 1, &end, 0));
307 if (*end != '\0')
308 einfo (_("%P: warning: bad version number in -subsystem option\n"));
309 }
310
311 for (i = 0; v[i].name; i++)
312 {
313 if (strncmp (optarg, v[i].name, len) == 0
314 && v[i].name[len] == '\0')
315 {
316 const char *initial_symbol_char;
317 const char *entry;
318
319 set_pe_name ("__subsystem__", v[i].value);
320
321 initial_symbol_char = ${INITIAL_SYMBOL_CHAR};
322 if (*initial_symbol_char == '\0')
323 entry = v[i].entry;
324 else
325 {
326 char *alc_entry;
327
328 /* lang_add_entry expects its argument to be permanently
329 allocated, so we don't free this string. */
330 alc_entry = xmalloc (strlen (initial_symbol_char)
331 + strlen (v[i].entry)
332 + 1);
333 strcpy (alc_entry, initial_symbol_char);
334 strcat (alc_entry, v[i].entry);
335 entry = alc_entry;
336 }
337
338 lang_add_entry (entry, 1);
339
340 return;
341 }
342 }
343
344 einfo (_("%P%F: invalid subsystem type %s\n"), optarg);
345 }
346
347
348
349 static void
350 set_pe_value (name)
351 char *name;
352
353 {
354 char *end;
355
356 set_pe_name (name, strtoul (optarg, &end, 0));
357
358 if (end == optarg)
359 einfo (_("%P%F: invalid hex number for PE parameter '%s'\n"), optarg);
360
361 optarg = end;
362 }
363
364 static void
365 set_pe_stack_heap (resname, comname)
366 char *resname;
367 char *comname;
368 {
369 set_pe_value (resname);
370
371 if (*optarg == ',')
372 {
373 optarg++;
374 set_pe_value (comname);
375 }
376 else if (*optarg)
377 einfo (_("%P%F: strange hex info for PE parameter '%s'\n"), optarg);
378 }
379
380
381
382 static int
383 gld_${EMULATION_NAME}_parse_args(argc, argv)
384 int argc;
385 char **argv;
386 {
387 int longind;
388 int optc;
389 int prevoptind = optind;
390 int prevopterr = opterr;
391 int wanterror;
392 static int lastoptind = -1;
393
394 if (lastoptind != optind)
395 opterr = 0;
396 wanterror = opterr;
397
398 lastoptind = optind;
399
400 optc = getopt_long_only (argc, argv, "-", longopts, &longind);
401 opterr = prevopterr;
402
403 switch (optc)
404 {
405 default:
406 if (wanterror)
407 xexit (1);
408 optind = prevoptind;
409 return 0;
410
411 case OPTION_BASE_FILE:
412 link_info.base_file = (PTR) fopen (optarg, FOPEN_WB);
413 if (link_info.base_file == NULL)
414 {
415 /* xgettext:c-format */
416 fprintf (stderr, _("%s: Can't open base file %s\n"),
417 program_name, optarg);
418 xexit (1);
419 }
420 break;
421
422 /* PE options */
423 case OPTION_HEAP:
424 set_pe_stack_heap ("__size_of_heap_reserve__", "__size_of_heap_commit__");
425 break;
426 case OPTION_STACK:
427 set_pe_stack_heap ("__size_of_stack_reserve__", "__size_of_stack_commit__");
428 break;
429 case OPTION_SUBSYSTEM:
430 set_pe_subsystem ();
431 break;
432 case OPTION_MAJOR_OS_VERSION:
433 set_pe_value ("__major_os_version__");
434 break;
435 case OPTION_MINOR_OS_VERSION:
436 set_pe_value ("__minor_os_version__");
437 break;
438 case OPTION_MAJOR_SUBSYSTEM_VERSION:
439 set_pe_value ("__major_subsystem_version__");
440 break;
441 case OPTION_MINOR_SUBSYSTEM_VERSION:
442 set_pe_value ("__minor_subsystem_version__");
443 break;
444 case OPTION_MAJOR_IMAGE_VERSION:
445 set_pe_value ("__major_image_version__");
446 break;
447 case OPTION_MINOR_IMAGE_VERSION:
448 set_pe_value ("__minor_image_version__");
449 break;
450 case OPTION_FILE_ALIGNMENT:
451 set_pe_value ("__file_alignment__");
452 break;
453 case OPTION_SECTION_ALIGNMENT:
454 set_pe_value ("__section_alignment__");
455 break;
456 case OPTION_DLL:
457 set_pe_name ("__dll__", 1);
458 break;
459 case OPTION_IMAGE_BASE:
460 set_pe_value ("__image_base__");
461 break;
462 case OPTION_SUPPORT_OLD_CODE:
463 support_old_code = 1;
464 break;
465 case OPTION_THUMB_ENTRY:
466 thumb_entry_symbol = optarg;
467 break;
468 #ifdef DLL_SUPPORT
469 case OPTION_OUT_DEF:
470 pe_out_def_filename = xstrdup (optarg);
471 break;
472 case OPTION_EXPORT_ALL:
473 pe_dll_export_everything = 1;
474 break;
475 case OPTION_EXCLUDE_SYMBOLS:
476 pe_dll_add_excludes (optarg);
477 break;
478 case OPTION_KILL_ATS:
479 pe_dll_kill_ats = 1;
480 break;
481 case OPTION_STDCALL_ALIASES:
482 pe_dll_stdcall_aliases = 1;
483 break;
484 case OPTION_ENABLE_STDCALL_FIXUP:
485 pe_enable_stdcall_fixup = 1;
486 break;
487 case OPTION_DISABLE_STDCALL_FIXUP:
488 pe_enable_stdcall_fixup = 0;
489 break;
490 case OPTION_IMPLIB_FILENAME:
491 pe_implib_filename = xstrdup (optarg);
492 break;
493 #endif
494 }
495 return 1;
496 }
497 \f
498 /* Assign values to the special symbols before the linker script is
499 read. */
500
501 static void
502 gld_${EMULATION_NAME}_set_symbols ()
503 {
504 /* Run through and invent symbols for all the
505 names and insert the defaults. */
506 int j;
507 lang_statement_list_type *save;
508
509 if (!init[IMAGEBASEOFF].inited)
510 {
511 if (link_info.relocateable)
512 init[IMAGEBASEOFF].value = 0;
513 else if (init[DLLOFF].value || link_info.shared)
514 init[IMAGEBASEOFF].value = NT_DLL_IMAGE_BASE;
515 else
516 init[IMAGEBASEOFF].value = NT_EXE_IMAGE_BASE;
517 }
518
519 /* Don't do any symbol assignments if this is a relocateable link. */
520 if (link_info.relocateable)
521 return;
522
523 /* Glue the assignments into the abs section */
524 save = stat_ptr;
525
526 stat_ptr = &(abs_output_section->children);
527
528 for (j = 0; init[j].ptr; j++)
529 {
530 long val = init[j].value;
531 lang_assignment_statement_type *rv;
532 rv = lang_add_assignment (exp_assop ('=' ,init[j].symbol, exp_intop (val)));
533 if (init[j].size == sizeof(short))
534 *(short *)init[j].ptr = val;
535 else if (init[j].size == sizeof(int))
536 *(int *)init[j].ptr = val;
537 else if (init[j].size == sizeof(long))
538 *(long *)init[j].ptr = val;
539 /* This might be a long long or other special type. */
540 else if (init[j].size == sizeof(bfd_vma))
541 *(bfd_vma *)init[j].ptr = val;
542 else abort();
543 if (j == IMAGEBASEOFF)
544 image_base_statement = rv;
545 }
546 /* Restore the pointer. */
547 stat_ptr = save;
548
549 if (pe.FileAlignment >
550 pe.SectionAlignment)
551 {
552 einfo (_("%P: warning, file alignment > section alignment.\n"));
553 }
554 }
555
556 /* This is called after the linker script and the command line options
557 have been read. */
558
559 static void
560 gld_${EMULATION_NAME}_after_parse ()
561 {
562 /* The Windows libraries are designed for the linker to treat the
563 entry point as an undefined symbol. Otherwise, the .obj that
564 defines mainCRTStartup is brought in because it is the first
565 encountered in libc.lib and it has other symbols in it which will
566 be pulled in by the link process. To avoid this, we act as
567 though the user specified -u with the entry point symbol.
568
569 This function is called after the linker script and command line
570 options have been read, so at this point we know the right entry
571 point. This function is called before the input files are
572 opened, so registering the symbol as undefined will make a
573 difference. */
574
575 if (! link_info.relocateable && entry_symbol != NULL)
576 ldlang_add_undef (entry_symbol);
577 }
578
579 static struct bfd_link_hash_entry *pe_undef_found_sym;
580
581 static boolean
582 pe_undef_cdecl_match (h, string)
583 struct bfd_link_hash_entry *h;
584 PTR string;
585 {
586 int sl = strlen (string);
587 if (h->type == bfd_link_hash_defined
588 && strncmp (h->root.string, string, sl) == 0
589 && h->root.string[sl] == '@')
590 {
591 pe_undef_found_sym = h;
592 return false;
593 }
594 return true;
595 }
596
597 static void
598 pe_fixup_stdcalls ()
599 {
600 static int gave_warning_message = 0;
601 struct bfd_link_hash_entry *undef, *sym;
602 char *at;
603 for (undef = link_info.hash->undefs; undef; undef=undef->next)
604 if (undef->type == bfd_link_hash_undefined)
605 {
606 at = strchr (undef->root.string, '@');
607 if (at)
608 {
609 /* The symbol is a stdcall symbol, so let's look for a cdecl
610 symbol with the same name and resolve to that */
611 char *cname = xstrdup (undef->root.string);
612 at = strchr (cname, '@');
613 *at = 0;
614 sym = bfd_link_hash_lookup (link_info.hash, cname, 0, 0, 1);
615 if (sym && sym->type == bfd_link_hash_defined)
616 {
617 undef->type = bfd_link_hash_defined;
618 undef->u.def.value = sym->u.def.value;
619 undef->u.def.section = sym->u.def.section;
620 if (pe_enable_stdcall_fixup == -1)
621 {
622 einfo (_("Warning: resolving %s by linking to %s\n"),
623 undef->root.string, cname);
624 if (! gave_warning_message)
625 {
626 gave_warning_message = 1;
627 einfo(_("Use --enable-stdcall-fixup to disable these warnings\n"));
628 einfo(_("Use --disable-stdcall-fixup to disable these fixups\n"));
629 }
630 }
631 }
632 }
633 else
634 {
635 /* The symbol is a cdecl symbol, so we look for stdcall
636 symbols - which means scanning the whole symbol table */
637 pe_undef_found_sym = 0;
638 bfd_link_hash_traverse (link_info.hash, pe_undef_cdecl_match,
639 (PTR) undef->root.string);
640 sym = pe_undef_found_sym;
641 if (sym)
642 {
643 undef->type = bfd_link_hash_defined;
644 undef->u.def.value = sym->u.def.value;
645 undef->u.def.section = sym->u.def.section;
646 if (pe_enable_stdcall_fixup == -1)
647 {
648 einfo (_("Warning: resolving %s by linking to %s\n"),
649 undef->root.string, sym->root.string);
650 if (! gave_warning_message)
651 {
652 gave_warning_message = 1;
653 einfo(_("Use --enable-stdcall-fixup to disable these warnings\n"));
654 einfo(_("Use --disable-stdcall-fixup to disable these fixups\n"));
655 }
656 }
657 }
658 }
659 }
660 }
661
662 static void
663 gld_${EMULATION_NAME}_after_open ()
664 {
665 /* Pass the wacky PE command line options into the output bfd.
666 FIXME: This should be done via a function, rather than by
667 including an internal BFD header. */
668
669 if (!coff_data (output_bfd)->pe)
670 einfo (_("%F%P: PE operations on non PE file.\n"));
671
672 pe_data (output_bfd)->pe_opthdr = pe;
673 pe_data (output_bfd)->dll = init[DLLOFF].value;
674
675 #ifdef DLL_SUPPORT
676 if (pe_enable_stdcall_fixup) /* -1=warn or 1=disable */
677 pe_fixup_stdcalls ();
678
679 pe_process_import_defs(output_bfd, &link_info);
680 if (link_info.shared)
681 pe_dll_build_sections (output_bfd, &link_info);
682 #endif
683
684 #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe)
685 if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
686 {
687 /* The arm backend needs special fields in the output hash structure.
688 These will only be created if the output format is an arm format,
689 hence we do not support linking and changing output formats at the
690 same time. Use a link followed by objcopy to change output formats. */
691 einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
692 return;
693 }
694 {
695 /* Find a BFD that can hold the interworking stubs. */
696 LANG_FOR_EACH_INPUT_STATEMENT (is)
697 {
698 if (bfd_arm_pe_get_bfd_for_interworking (is->the_bfd, & link_info))
699 break;
700 }
701 }
702 #endif
703
704 {
705 int is_ms_arch;
706 bfd *cur_arch = 0;
707 lang_input_statement_type *is2;
708
709 /* Careful - this is a shell script. Watch those dollar signs! */
710 /* Microsoft import libraries have every member named the same,
711 and not in the right order for us to link them correctly. We
712 must detect these and rename the members so that they'll link
713 correctly. There are three types of objects: the head, the
714 thunks, and the sentinel(s). The head is easy; it's the one
715 with idata2. We assume that the sentinels won't have relocs,
716 and the thunks will. It's easier than checking the symbol
717 table for external references. */
718 LANG_FOR_EACH_INPUT_STATEMENT (is)
719 {
720 if (is->the_bfd->my_archive)
721 {
722 bfd *arch = is->the_bfd->my_archive;
723 if (cur_arch != arch)
724 {
725 cur_arch = arch;
726 is_ms_arch = 1;
727 for (is2 = is;
728 is2 && is2->the_bfd->my_archive == arch;
729 is2 = (lang_input_statement_type *)is2->next)
730 {
731 if (strcmp (is->the_bfd->filename, is2->the_bfd->filename))
732 is_ms_arch = 0;
733 }
734 }
735
736 if (is_ms_arch)
737 {
738 int idata2 = 0, reloc_count=0;
739 asection *sec;
740 char *new_name, seq;
741
742 for (sec = is->the_bfd->sections; sec; sec = sec->next)
743 {
744 if (strcmp (sec->name, ".idata\$2") == 0)
745 idata2 = 1;
746 reloc_count += sec->reloc_count;
747 }
748
749 if (idata2) /* .idata2 is the TOC */
750 seq = 'a';
751 else if (reloc_count > 0) /* thunks */
752 seq = 'b';
753 else /* sentinel */
754 seq = 'c';
755
756 new_name = xmalloc (strlen (is->the_bfd->filename) + 3);
757 sprintf (new_name, "%s.%c", is->the_bfd->filename, seq);
758 is->the_bfd->filename = new_name;
759
760 new_name = xmalloc (strlen(is->filename) + 3);
761 sprintf (new_name, "%s.%c", is->filename, seq);
762 is->filename = new_name;
763 }
764 }
765 }
766 }
767 }
768 \f
769 static void
770 gld_${EMULATION_NAME}_before_allocation()
771 {
772 #ifdef TARGET_IS_ppcpe
773 /* Here we rummage through the found bfds to collect toc information */
774 {
775 LANG_FOR_EACH_INPUT_STATEMENT (is)
776 {
777 if (!ppc_process_before_allocation (is->the_bfd, &link_info))
778 {
779 /* xgettext:c-format */
780 einfo (_("Errors encountered processing file %s\n"), is->filename);
781 }
782 }
783 }
784
785 /* We have seen it all. Allocate it, and carry on */
786 ppc_allocate_toc_section (&link_info);
787 #endif /* TARGET_IS_ppcpe */
788
789 #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe)
790 /* FIXME: we should be able to set the size of the interworking stub
791 section.
792
793 Here we rummage through the found bfds to collect glue
794 information. FIXME: should this be based on a command line
795 option? krk@cygnus.com */
796 {
797 LANG_FOR_EACH_INPUT_STATEMENT (is)
798 {
799 if (! bfd_arm_pe_process_before_allocation
800 (is->the_bfd, & link_info, support_old_code))
801 {
802 /* xgettext:c-format */
803 einfo (_("Errors encountered processing file %s for interworking"),
804 is->filename);
805 }
806 }
807 }
808
809 /* We have seen it all. Allocate it, and carry on */
810 bfd_arm_pe_allocate_interworking_sections (& link_info);
811 #endif /* TARGET_IS_armpe */
812 }
813 \f
814
815 /* This is called when an input file isn't recognized as a BFD. We
816 check here for .DEF files and pull them in automatically. */
817
818 static int
819 saw_option(char *option)
820 {
821 int i;
822 for (i=0; init[i].ptr; i++)
823 if (strcmp (init[i].symbol, option) == 0)
824 return init[i].inited;
825 return 0;
826 }
827
828 static boolean
829 gld_${EMULATION_NAME}_unrecognized_file(entry)
830 lang_input_statement_type *entry;
831 {
832 #ifdef DLL_SUPPORT
833 const char *ext = entry->filename + strlen (entry->filename) - 4;
834
835 if (strcmp (ext, ".def") == 0 || strcmp (ext, ".DEF") == 0)
836 {
837 if (pe_def_file == 0)
838 pe_def_file = def_file_empty ();
839 def_file_parse (entry->filename, pe_def_file);
840 if (pe_def_file)
841 {
842 int i, buflen=0, len;
843 char *buf;
844 for (i=0; i<pe_def_file->num_exports; i++)
845 {
846 len = strlen(pe_def_file->exports[i].internal_name);
847 if (buflen < len+2)
848 buflen = len+2;
849 }
850 buf = (char *) xmalloc (buflen);
851 for (i=0; i<pe_def_file->num_exports; i++)
852 {
853 struct bfd_link_hash_entry *h;
854 sprintf(buf, "_%s", pe_def_file->exports[i].internal_name);
855
856 h = bfd_link_hash_lookup (link_info.hash, buf, true, true, true);
857 if (h == (struct bfd_link_hash_entry *) NULL)
858 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
859 if (h->type == bfd_link_hash_new)
860 {
861 h->type = bfd_link_hash_undefined;
862 h->u.undef.abfd = NULL;
863 bfd_link_add_undef (link_info.hash, h);
864 }
865 }
866 free (buf);
867
868 /* def_file_print (stdout, pe_def_file); */
869 if (pe_def_file->is_dll == 1)
870 link_info.shared = 1;
871
872 if (pe_def_file->base_address != (bfd_vma)(-1))
873 {
874 pe.ImageBase =
875 pe_data (output_bfd)->pe_opthdr.ImageBase =
876 init[IMAGEBASEOFF].value = pe_def_file->base_address;
877 init[IMAGEBASEOFF].inited = 1;
878 if (image_base_statement)
879 image_base_statement->exp =
880 exp_assop ('=', "__image_base__", exp_intop (pe.ImageBase));
881 }
882
883 #if 0
884 /* Not sure if these *should* be set */
885 if (pe_def_file->version_major != -1)
886 {
887 pe.MajorImageVersion = pe_def_file->version_major;
888 pe.MinorImageVersion = pe_def_file->version_minor;
889 }
890 #endif
891 if (pe_def_file->stack_reserve != -1
892 && ! saw_option ("__size_of_stack_reserve__"))
893 {
894 pe.SizeOfStackReserve = pe_def_file->stack_reserve;
895 if (pe_def_file->stack_commit != -1)
896 pe.SizeOfStackCommit = pe_def_file->stack_commit;
897 }
898 if (pe_def_file->heap_reserve != -1
899 && ! saw_option ("__size_of_heap_reserve__"))
900 {
901 pe.SizeOfHeapReserve = pe_def_file->heap_reserve;
902 if (pe_def_file->heap_commit != -1)
903 pe.SizeOfHeapCommit = pe_def_file->heap_commit;
904 }
905 return true;
906 }
907 }
908 #endif
909 return false;
910
911 }
912
913 static boolean
914 gld_${EMULATION_NAME}_recognized_file(entry)
915 lang_input_statement_type *entry;
916 {
917 #ifdef DLL_SUPPORT
918 #ifdef TARGET_IS_i386pe
919 pe_dll_id_target ("pei-i386");
920 #endif
921 if (bfd_get_format (entry->the_bfd) == bfd_object)
922 {
923 const char *ext = entry->filename + strlen (entry->filename) - 4;
924 if (strcmp (ext, ".dll") == 0 || strcmp (ext, ".DLL") == 0)
925 return pe_implied_import_dll (entry->filename);
926 }
927 #endif
928 return false;
929 }
930
931 static void
932 gld_${EMULATION_NAME}_finish ()
933 {
934 #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe)
935 struct bfd_link_hash_entry * h;
936
937 if (thumb_entry_symbol != NULL)
938 {
939 h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, false, false, true);
940
941 if (h != (struct bfd_link_hash_entry *) NULL
942 && (h->type == bfd_link_hash_defined
943 || h->type == bfd_link_hash_defweak)
944 && h->u.def.section->output_section != NULL)
945 {
946 static char buffer[32];
947 bfd_vma val;
948
949 /* Special procesing is required for a Thumb entry symbol. The
950 bottom bit of its address must be set. */
951 val = (h->u.def.value
952 + bfd_get_section_vma (output_bfd,
953 h->u.def.section->output_section)
954 + h->u.def.section->output_offset);
955
956 val |= 1;
957
958 /* Now convert this value into a string and store it in entry_symbol
959 where the lang_finish() function will pick it up. */
960 buffer[0] = '0';
961 buffer[1] = 'x';
962
963 sprintf_vma (buffer + 2, val);
964
965 if (entry_symbol != NULL && entry_from_cmdline)
966 einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
967 thumb_entry_symbol, entry_symbol);
968 entry_symbol = buffer;
969 }
970 else
971 einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
972 }
973 #endif /* defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe) */
974
975 #ifdef DLL_SUPPORT
976 if (link_info.shared)
977 {
978 pe_dll_fill_sections (output_bfd, &link_info);
979 if (pe_implib_filename)
980 pe_dll_generate_implib (pe_def_file, pe_implib_filename);
981 }
982 if (pe_out_def_filename)
983 pe_dll_generate_def_file (pe_out_def_filename);
984 #endif
985 }
986
987 \f
988 /* Place an orphan section.
989
990 We use this to put sections in a reasonable place in the file, and
991 to ensure that they are aligned as required.
992
993 We handle grouped sections here as well. A section named .foo$nn
994 goes into the output section .foo. All grouped sections are sorted
995 by name.
996
997 Grouped sections for the default sections are handled by the
998 default linker script using wildcards, and are sorted by
999 sort_sections. */
1000
1001 static asection *hold_section;
1002 static char *hold_section_name;
1003 static lang_output_section_statement_type *hold_use;
1004 static lang_output_section_statement_type *hold_text;
1005 static lang_output_section_statement_type *hold_rdata;
1006 static lang_output_section_statement_type *hold_data;
1007 static lang_output_section_statement_type *hold_bss;
1008
1009 /* Place an orphan section. We use this to put random SHF_ALLOC
1010 sections in the right segment. */
1011
1012 /*ARGSUSED*/
1013 static boolean
1014 gld_${EMULATION_NAME}_place_orphan (file, s)
1015 lang_input_statement_type *file;
1016 asection *s;
1017 {
1018 const char *secname;
1019 char *dollar;
1020
1021 if ((s->flags & SEC_ALLOC) == 0)
1022 return false;
1023
1024 secname = bfd_get_section_name (s->owner, s);
1025
1026 /* Look through the script to see where to place this section. */
1027
1028 hold_section = s;
1029
1030 hold_section_name = xstrdup (secname);
1031 if (!link_info.relocateable)
1032 {
1033 dollar = strchr (hold_section_name, '$');
1034 if (dollar != NULL)
1035 *dollar = '\0';
1036 }
1037
1038 hold_use = NULL;
1039 lang_for_each_statement (gld${EMULATION_NAME}_place_section);
1040
1041 if (hold_use == NULL)
1042 {
1043 lang_output_section_statement_type *place;
1044 char *outsecname;
1045 asection *snew, **pps;
1046 lang_statement_list_type *old;
1047 lang_statement_list_type add;
1048 etree_type *address;
1049
1050 /* Try to put the new output section in a reasonable place based
1051 on the section name and section flags. */
1052 place = NULL;
1053 if ((s->flags & SEC_HAS_CONTENTS) == 0
1054 && hold_bss != NULL)
1055 place = hold_bss;
1056 else if ((s->flags & SEC_READONLY) == 0
1057 && hold_data != NULL)
1058 place = hold_data;
1059 else if ((s->flags & SEC_CODE) == 0
1060 && (s->flags & SEC_READONLY) != 0
1061 && hold_rdata != NULL)
1062 place = hold_rdata;
1063 else if ((s->flags & SEC_READONLY) != 0
1064 && hold_text != NULL)
1065 place = hold_text;
1066
1067 /* Choose a unique name for the section. This will be needed if
1068 the same section name appears in the input file with
1069 different loadable or allocateable characteristics. */
1070 outsecname = xstrdup (hold_section_name);
1071 if (bfd_get_section_by_name (output_bfd, outsecname) != NULL)
1072 {
1073 unsigned int len;
1074 char *newname;
1075 unsigned int i;
1076
1077 len = strlen (outsecname);
1078 newname = xmalloc (len + 5);
1079 strcpy (newname, outsecname);
1080 i = 0;
1081 do
1082 {
1083 sprintf (newname + len, "%d", i);
1084 ++i;
1085 }
1086 while (bfd_get_section_by_name (output_bfd, newname) != NULL);
1087
1088 free (outsecname);
1089 outsecname = newname;
1090 }
1091
1092 /* We don't want to free OUTSECNAME, as it may get attached to
1093 the output section statement. */
1094
1095 /* Create the section in the output file, and put it in the
1096 right place. This shuffling is to make the output file look
1097 neater. */
1098 snew = bfd_make_section (output_bfd, outsecname);
1099 if (snew == NULL)
1100 einfo ("%P%F: output format %s cannot represent section called %s\n",
1101 output_bfd->xvec->name, outsecname);
1102 if (place != NULL && place->bfd_section != NULL)
1103 {
1104 for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
1105 ;
1106 *pps = snew->next;
1107 snew->next = place->bfd_section->next;
1108 place->bfd_section->next = snew;
1109 }
1110
1111 /* Start building a list of statements for this section. */
1112 old = stat_ptr;
1113 stat_ptr = &add;
1114 lang_list_init (stat_ptr);
1115
1116 if (link_info.relocateable)
1117 address = NULL;
1118 else
1119 {
1120 /* All sections in an executable must be aligned to a page
1121 boundary. */
1122 address = exp_unop (ALIGN_K,
1123 exp_nameop (NAME, "__section_alignment__"));
1124 }
1125
1126 lang_enter_output_section_statement (outsecname, address, 0,
1127 (bfd_vma) 0,
1128 (etree_type *) NULL,
1129 (etree_type *) NULL,
1130 (etree_type *) NULL);
1131
1132 hold_use = lang_output_section_statement_lookup (outsecname);
1133
1134 lang_leave_output_section_statement
1135 ((bfd_vma) 0, "*default*",
1136 (struct lang_output_section_phdr_list *) NULL);
1137
1138 /* Now stick the new statement list right after PLACE. */
1139 if (place != NULL)
1140 {
1141 *add.tail = place->header.next;
1142 place->header.next = add.head;
1143 }
1144
1145 stat_ptr = old;
1146 }
1147
1148 if (dollar == NULL)
1149 wild_doit (&hold_use->children, s, hold_use, file);
1150 else
1151 {
1152 lang_statement_union_type **pl;
1153 boolean found_dollar;
1154 lang_statement_list_type list;
1155
1156 /* The section name has a '$'. Sort it with the other '$'
1157 sections. */
1158
1159 found_dollar = false;
1160 for (pl = &hold_use->children.head; *pl != NULL; pl = &(*pl)->next)
1161 {
1162 lang_input_section_type *ls;
1163 const char *lname;
1164
1165 if ((*pl)->header.type != lang_input_section_enum)
1166 continue;
1167
1168 ls = &(*pl)->input_section;
1169
1170 lname = bfd_get_section_name (ls->ifile->the_bfd, ls->section);
1171 if (strchr (lname, '$') == NULL)
1172 {
1173 if (found_dollar)
1174 break;
1175 }
1176 else
1177 {
1178 found_dollar = true;
1179 if (strcmp (secname, lname) < 0)
1180 break;
1181 }
1182 }
1183
1184 lang_list_init (&list);
1185 wild_doit (&list, s, hold_use, file);
1186 if (list.head != NULL)
1187 {
1188 ASSERT (list.head->next == NULL);
1189 list.head->next = *pl;
1190 *pl = list.head;
1191 }
1192 }
1193
1194 free (hold_section_name);
1195
1196 return true;
1197 }
1198
1199 static void
1200 gld${EMULATION_NAME}_place_section (s)
1201 lang_statement_union_type *s;
1202 {
1203 lang_output_section_statement_type *os;
1204
1205 if (s->header.type != lang_output_section_statement_enum)
1206 return;
1207
1208 os = &s->output_section_statement;
1209
1210 if (strcmp (os->name, hold_section_name) == 0
1211 && os->bfd_section != NULL
1212 && ((hold_section->flags & (SEC_LOAD | SEC_ALLOC))
1213 == (os->bfd_section->flags & (SEC_LOAD | SEC_ALLOC))))
1214 hold_use = os;
1215
1216 if (strcmp (os->name, ".text") == 0)
1217 hold_text = os;
1218 else if (strcmp (os->name, ".rdata") == 0)
1219 hold_rdata = os;
1220 else if (strcmp (os->name, ".data") == 0)
1221 hold_data = os;
1222 else if (strcmp (os->name, ".bss") == 0)
1223 hold_bss = os;
1224 }
1225 \f
1226 static char *
1227 gld_${EMULATION_NAME}_get_script(isfile)
1228 int *isfile;
1229 EOF
1230 # Scripts compiled in.
1231 # sed commands to quote an ld script as a C string.
1232 sc="-f stringify.sed"
1233
1234 cat >>e${EMULATION_NAME}.c <<EOF
1235 {
1236 *isfile = 0;
1237
1238 if (link_info.relocateable == true && config.build_constructors == true)
1239 return
1240 EOF
1241 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1242 echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
1243 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1244 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1245 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1246 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1247 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1248 echo ' ; else return' >> e${EMULATION_NAME}.c
1249 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1250 echo '; }' >> e${EMULATION_NAME}.c
1251
1252 cat >>e${EMULATION_NAME}.c <<EOF
1253
1254
1255 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
1256 {
1257 gld_${EMULATION_NAME}_before_parse,
1258 syslib_default,
1259 hll_default,
1260 gld_${EMULATION_NAME}_after_parse,
1261 gld_${EMULATION_NAME}_after_open,
1262 after_allocation_default,
1263 set_output_arch_default,
1264 ldemul_default_target,
1265 gld_${EMULATION_NAME}_before_allocation,
1266 gld_${EMULATION_NAME}_get_script,
1267 "${EMULATION_NAME}",
1268 "${OUTPUT_FORMAT}",
1269 gld_${EMULATION_NAME}_finish, /* finish */
1270 NULL, /* create output section statements */
1271 NULL, /* open dynamic archive */
1272 gld_${EMULATION_NAME}_place_orphan,
1273 gld_${EMULATION_NAME}_set_symbols,
1274 gld_${EMULATION_NAME}_parse_args,
1275 gld_${EMULATION_NAME}_unrecognized_file,
1276 gld_${EMULATION_NAME}_list_options,
1277 gld_${EMULATION_NAME}_recognized_file
1278 };
1279 EOF
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