1 # This shell script emits a C file. -*- C -*-
2 # It does some substitutions.
3 if [ -z "$MACHINE" ]; then
6 OUTPUT_ARCH=${ARCH}:${MACHINE}
9 /* This file is part of GLD, the Gnu Linker.
10 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
11 2005, 2006, 2007 Free Software Foundation, Inc.
13 This file is part of the GNU Binutils.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 3 of the License, or
18 (at your option) any later version.
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with this program; if not, write to the Free Software
27 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
28 MA 02110-1301, USA. */
32 /* The original file generated returned different default scripts depending
33 on whether certain switches were set, but these switches pertain to the
34 Linux system and that particular version of coff. In the NT case, we
35 only determine if the subsystem is console or windows in order to select
36 the correct entry point by default. */
42 #include "libiberty.h"
53 #include "coff/internal.h"
54 #include "../bfd/libcoff.h"
56 #define TARGET_IS_${EMULATION_NAME}
58 static struct internal_extra_pe_aouthdr pe;
61 extern const char *output_filename;
64 gld_${EMULATION_NAME}_before_parse (void)
66 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
67 output_filename = "a.exe";
70 /* PE format extra command line options. */
72 /* Used for setting flags in the PE header. */
73 #define OPTION_BASE_FILE (300 + 1)
74 #define OPTION_DLL (OPTION_BASE_FILE + 1)
75 #define OPTION_FILE_ALIGNMENT (OPTION_DLL + 1)
76 #define OPTION_IMAGE_BASE (OPTION_FILE_ALIGNMENT + 1)
77 #define OPTION_MAJOR_IMAGE_VERSION (OPTION_IMAGE_BASE + 1)
78 #define OPTION_MAJOR_OS_VERSION (OPTION_MAJOR_IMAGE_VERSION + 1)
79 #define OPTION_MAJOR_SUBSYSTEM_VERSION (OPTION_MAJOR_OS_VERSION + 1)
80 #define OPTION_MINOR_IMAGE_VERSION (OPTION_MAJOR_SUBSYSTEM_VERSION + 1)
81 #define OPTION_MINOR_OS_VERSION (OPTION_MINOR_IMAGE_VERSION + 1)
82 #define OPTION_MINOR_SUBSYSTEM_VERSION (OPTION_MINOR_OS_VERSION + 1)
83 #define OPTION_SECTION_ALIGNMENT (OPTION_MINOR_SUBSYSTEM_VERSION + 1)
84 #define OPTION_STACK (OPTION_SECTION_ALIGNMENT + 1)
85 #define OPTION_SUBSYSTEM (OPTION_STACK + 1)
86 #define OPTION_HEAP (OPTION_SUBSYSTEM + 1)
89 gld${EMULATION_NAME}_add_options
90 (int ns ATTRIBUTE_UNUSED, char **shortopts ATTRIBUTE_UNUSED, int nl,
91 struct option **longopts, int nrl ATTRIBUTE_UNUSED,
92 struct option **really_longopts ATTRIBUTE_UNUSED)
94 static const struct option xtra_long[] = {
96 {"base-file", required_argument, NULL, OPTION_BASE_FILE},
97 {"dll", no_argument, NULL, OPTION_DLL},
98 {"file-alignment", required_argument, NULL, OPTION_FILE_ALIGNMENT},
99 {"heap", required_argument, NULL, OPTION_HEAP},
100 {"image-base", required_argument, NULL, OPTION_IMAGE_BASE},
101 {"major-image-version", required_argument, NULL, OPTION_MAJOR_IMAGE_VERSION},
102 {"major-os-version", required_argument, NULL, OPTION_MAJOR_OS_VERSION},
103 {"major-subsystem-version", required_argument, NULL, OPTION_MAJOR_SUBSYSTEM_VERSION},
104 {"minor-image-version", required_argument, NULL, OPTION_MINOR_IMAGE_VERSION},
105 {"minor-os-version", required_argument, NULL, OPTION_MINOR_OS_VERSION},
106 {"minor-subsystem-version", required_argument, NULL, OPTION_MINOR_SUBSYSTEM_VERSION},
107 {"section-alignment", required_argument, NULL, OPTION_SECTION_ALIGNMENT},
108 {"stack", required_argument, NULL, OPTION_STACK},
109 {"subsystem", required_argument, NULL, OPTION_SUBSYSTEM},
110 {NULL, no_argument, NULL, 0}
113 *longopts = (struct option *)
114 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
115 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
119 /* PE/WIN32; added routines to get the subsystem type, heap and/or stack
120 parameters which may be input from the command line */
130 #define D(field,symbol,def) {&pe.field,sizeof(pe.field), def, symbol,0}
132 static definfo init[] =
134 /* imagebase must be first */
135 #define IMAGEBASEOFF 0
136 D(ImageBase,"__image_base__", BEOS_EXE_IMAGE_BASE),
138 {&dll, sizeof(dll), 0, "__dll__", 0},
139 D(SectionAlignment,"__section_alignment__", PE_DEF_SECTION_ALIGNMENT),
140 D(FileAlignment,"__file_alignment__", PE_DEF_FILE_ALIGNMENT),
141 D(MajorOperatingSystemVersion,"__major_os_version__", 4),
142 D(MinorOperatingSystemVersion,"__minor_os_version__", 0),
143 D(MajorImageVersion,"__major_image_version__", 1),
144 D(MinorImageVersion,"__minor_image_version__", 0),
145 D(MajorSubsystemVersion,"__major_subsystem_version__", 4),
146 D(MinorSubsystemVersion,"__minor_subsystem_version__", 0),
147 D(Subsystem,"__subsystem__", 3),
148 D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x2000000),
149 D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000),
150 D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000),
151 D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000),
152 D(LoaderFlags,"__loader_flags__", 0x0),
153 { NULL, 0, 0, NULL, 0 }
158 set_pe_name (char *name, long val)
161 /* Find the name and set it. */
162 for (i = 0; init[i].ptr; i++)
164 if (strcmp (name, init[i].symbol) == 0)
176 set_pe_subsystem (void)
189 { "native", 1, "_NtProcessStartup" },
190 { "windows", 2, "_WinMainCRTStartup" },
191 { "wwindows", 2, "_wWinMainCRTStartup" },
192 { "console", 3, "_mainCRTStartup" },
193 { "wconsole", 3, "_wmainCRTStartup" },
194 { "posix", 7, "___PosixProcessStartup"},
198 sver = strchr (optarg, ':');
200 len = strlen (optarg);
206 set_pe_name ("__major_subsystem_version__",
207 strtoul (sver + 1, &end, 0));
209 set_pe_name ("__minor_subsystem_version__",
210 strtoul (end + 1, &end, 0));
212 einfo ("%P: warning: bad version number in -subsystem option\n");
215 for (i = 0; v[i].name; i++)
217 if (strncmp (optarg, v[i].name, len) == 0
218 && v[i].name[len] == '\0')
220 set_pe_name ("__subsystem__", v[i].value);
222 /* If the subsystem is windows, we use a different entry
224 lang_default_entry (v[i].entry);
229 einfo ("%P%F: invalid subsystem type %s\n", optarg);
234 set_pe_value (char *name)
237 set_pe_name (name, strtoul (optarg, &end, 0));
240 einfo ("%P%F: invalid hex number for PE parameter '%s'\n", optarg);
247 set_pe_stack_heap (char *resname, char *comname)
249 set_pe_value (resname);
253 set_pe_value (comname);
257 einfo ("%P%F: strange hex info for PE parameter '%s'\n", optarg);
263 gld${EMULATION_NAME}_handle_option (int optc)
270 case OPTION_BASE_FILE:
271 link_info.base_file = fopen (optarg, FOPEN_WB);
272 if (link_info.base_file == NULL)
274 fprintf (stderr, "%s: Can't open base file %s\n",
275 program_name, optarg);
282 set_pe_stack_heap ("__size_of_heap_reserve__", "__size_of_heap_commit__");
285 set_pe_stack_heap ("__size_of_stack_reserve__", "__size_of_stack_commit__");
287 case OPTION_SUBSYSTEM:
290 case OPTION_MAJOR_OS_VERSION:
291 set_pe_value ("__major_os_version__");
293 case OPTION_MINOR_OS_VERSION:
294 set_pe_value ("__minor_os_version__");
296 case OPTION_MAJOR_SUBSYSTEM_VERSION:
297 set_pe_value ("__major_subsystem_version__");
299 case OPTION_MINOR_SUBSYSTEM_VERSION:
300 set_pe_value ("__minor_subsystem_version__");
302 case OPTION_MAJOR_IMAGE_VERSION:
303 set_pe_value ("__major_image_version__");
305 case OPTION_MINOR_IMAGE_VERSION:
306 set_pe_value ("__minor_image_version__");
308 case OPTION_FILE_ALIGNMENT:
309 set_pe_value ("__file_alignment__");
311 case OPTION_SECTION_ALIGNMENT:
312 set_pe_value ("__section_alignment__");
315 set_pe_name ("__dll__", 1);
317 case OPTION_IMAGE_BASE:
318 set_pe_value ("__image_base__");
324 /* Assign values to the special symbols before the linker script is
328 gld_${EMULATION_NAME}_set_symbols (void)
330 /* Run through and invent symbols for all the
331 names and insert the defaults. */
333 lang_statement_list_type *save;
335 if (!init[IMAGEBASEOFF].inited)
337 if (link_info.relocatable)
338 init[IMAGEBASEOFF].value = 0;
339 else if (init[DLLOFF].value)
340 init[IMAGEBASEOFF].value = BEOS_DLL_IMAGE_BASE;
342 init[IMAGEBASEOFF].value = BEOS_EXE_IMAGE_BASE;
345 /* Don't do any symbol assignments if this is a relocatable link. */
346 if (link_info.relocatable)
349 /* Glue the assignments into the abs section */
352 stat_ptr = &(abs_output_section->children);
354 for (j = 0; init[j].ptr; j++)
356 long val = init[j].value;
357 lang_add_assignment (exp_assop ('=', init[j].symbol, exp_intop (val)));
358 if (init[j].size == sizeof(short))
359 *(short *)init[j].ptr = val;
360 else if (init[j].size == sizeof(int))
361 *(int *)init[j].ptr = val;
362 else if (init[j].size == sizeof(long))
363 *(long *)init[j].ptr = val;
364 /* This might be a long long or other special type. */
365 else if (init[j].size == sizeof(bfd_vma))
366 *(bfd_vma *)init[j].ptr = val;
369 /* Restore the pointer. */
372 if (pe.FileAlignment >
375 einfo ("%P: warning, file alignment > section alignment.\n");
380 gld_${EMULATION_NAME}_after_open (void)
382 /* Pass the wacky PE command line options into the output bfd.
383 FIXME: This should be done via a function, rather than by
384 including an internal BFD header. */
385 if (!coff_data(output_bfd)->pe)
387 einfo ("%F%P: PE operations on non PE file.\n");
390 pe_data(output_bfd)->pe_opthdr = pe;
391 pe_data(output_bfd)->dll = init[DLLOFF].value;
395 /* Callback functions for qsort in sort_sections. */
398 sort_by_file_name (const void *a, const void *b)
400 const lang_statement_union_type *const *ra = a;
401 const lang_statement_union_type *const *rb = b;
404 i = strcmp ((*ra)->input_section.section->owner->my_archive->filename,
405 (*rb)->input_section.section->owner->my_archive->filename);
409 i = strcmp ((*ra)->input_section.section->owner->filename,
410 (*rb)->input_section.section->owner->filename);
413 /* the tail idata4/5 are the only ones without relocs to an
414 idata$6 section unless we are importing by ordinal,
415 so sort them to last to terminate the IAT
416 and HNT properly. if no reloc this one is import by ordinal
417 so we have to sort by section contents */
419 if ( ((*ra)->input_section.section->reloc_count + (*rb)->input_section.section->reloc_count) )
421 i = (((*ra)->input_section.section->reloc_count >
422 (*rb)->input_section.section->reloc_count) ? -1 : 0);
426 return (((*ra)->input_section.section->reloc_count >
427 (*rb)->input_section.section->reloc_count) ? 0 : 1);
431 if ( (strcmp( (*ra)->input_section.section->name, ".idata$6") == 0) )
432 return 0; /* don't sort .idata$6 or .idata$7 FIXME dlltool eliminate .idata$7 */
434 if (! bfd_get_section_contents ((*ra)->input_section.section->owner,
435 (*ra)->input_section.section, &a_sec, (file_ptr) 0, (bfd_size_type)sizeof(a_sec)))
436 einfo ("%F%B: Can't read contents of section .idata: %E\n",
437 (*ra)->input_section.section->owner);
439 if (! bfd_get_section_contents ((*rb)->input_section.section->owner,
440 (*rb)->input_section.section, &b_sec, (file_ptr) 0, (bfd_size_type)sizeof(b_sec) ))
441 einfo ("%F%B: Can't read contents of section .idata: %E\n",
442 (*rb)->input_section.section->owner);
444 i = ((a_sec < b_sec) ? -1 : 0);
447 return ((a_sec < b_sec) ? 0 : 1);
453 sort_by_section_name (const void *a, const void *b)
455 const lang_statement_union_type *const *ra = a;
456 const lang_statement_union_type *const *rb = b;
458 i = strcmp ((*ra)->input_section.section->name,
459 (*rb)->input_section.section->name);
460 /* This is a hack to make .stab and .stabstr last, so we don't have
461 to fix strip/objcopy for .reloc sections.
462 FIXME stripping images with a .rsrc section still needs to be fixed. */
465 if ((CONST_STRNEQ ((*ra)->input_section.section->name, ".stab"))
466 && (! CONST_STRNEQ ((*rb)->input_section.section->name, ".stab")))
472 /* Subroutine of sort_sections to a contiguous subset of a list of sections.
473 NEXT_AFTER is the element after the last one to sort.
474 The result is a pointer to the last element's "next" pointer. */
476 static lang_statement_union_type **
477 sort_sections_1 (lang_statement_union_type **startptr,
478 lang_statement_union_type *next_after,
480 int (*sort_func) (const void *, const void *))
482 lang_statement_union_type **vec;
483 lang_statement_union_type *p;
485 lang_statement_union_type **ret;
490 vec = ((lang_statement_union_type **)
491 xmalloc (count * sizeof (lang_statement_union_type *)));
493 for (p = *startptr, i = 0; i < count; i++, p = p->header.next)
496 qsort (vec, count, sizeof (vec[0]), sort_func);
498 /* Fill in the next pointers again. */
500 for (i = 0; i < count - 1; i++)
501 vec[i]->header.next = vec[i + 1];
502 vec[i]->header.next = next_after;
503 ret = &vec[i]->header.next;
508 /* Sort the .idata\$foo input sections of archives into filename order.
509 The reason is so dlltool can arrange to have the pe dll import information
510 generated correctly - the head of the list goes into dh.o, the tail into
511 dt.o, and the guts into ds[nnnn].o. Note that this is only needed for the
513 FIXME: This may no longer be necessary with grouped sections. Instead of
514 sorting on dh.o, ds[nnnn].o, dt.o, one could, for example, have dh.o use
515 .idata\$4h, have ds[nnnn].o use .idata\$4s[nnnn], and have dt.o use .idata\$4t.
516 This would have to be elaborated upon to handle multiple dll's
517 [assuming such an eloboration is possible of course].
519 We also sort sections in '\$' wild statements. These are created by the
520 place_orphans routine to implement grouped sections. */
523 sort_sections (lang_statement_union_type *s)
525 for (; s ; s = s->header.next)
526 switch (s->header.type)
528 case lang_output_section_statement_enum:
529 sort_sections (s->output_section_statement.children.head);
531 case lang_wild_statement_enum:
533 lang_statement_union_type **p = &s->wild_statement.children.head;
534 struct wildcard_list *sec;
536 for (sec = s->wild_statement.section_list; sec; sec = sec->next)
538 /* Is this the .idata section? */
539 if (sec->spec.name != NULL
540 && CONST_STRNEQ (sec->spec.name, ".idata"))
542 /* Sort the children. We want to sort any objects in
543 the same archive. In order to handle the case of
544 including a single archive multiple times, we sort
545 all the children by archive name and then by object
546 name. After sorting them, we re-thread the pointer
551 lang_statement_union_type *start = *p;
552 if (start->header.type != lang_input_section_enum
553 || !start->input_section.section->owner->my_archive)
554 p = &(start->header.next);
557 lang_statement_union_type *end;
560 for (end = start, count = 0;
561 end && (end->header.type
562 == lang_input_section_enum);
563 end = end->header.next)
566 p = sort_sections_1 (p, end, count,
573 /* If this is a collection of grouped sections, sort them.
574 The linker script must explicitly mention "*(.foo\$)" or
575 "*(.foo\$*)". Don't sort them if \$ is not the last
576 character (not sure if this is really useful, but it
577 allows explicitly mentioning some \$ sections and letting
578 the linker handle the rest). */
579 if (sec->spec.name != NULL)
581 char *q = strchr (sec->spec.name, '\$');
585 || (q[1] == '*' && q[2] == '\0')))
587 lang_statement_union_type *end;
590 for (end = *p, count = 0; end; end = end->header.next)
592 if (end->header.type != lang_input_section_enum)
596 (void) sort_sections_1 (p, end, count,
597 sort_by_section_name);
610 gld_${EMULATION_NAME}_before_allocation (void)
612 extern lang_statement_list_type *stat_ptr;
614 #ifdef TARGET_IS_ppcpe
615 /* Here we rummage through the found bfds to collect toc information */
617 LANG_FOR_EACH_INPUT_STATEMENT (is)
619 if (!ppc_process_before_allocation(is->the_bfd, &link_info))
621 einfo("Errors encountered processing file %s\n", is->filename);
626 /* We have seen it all. Allocate it, and carry on */
627 ppc_allocate_toc_section (&link_info);
629 #ifdef TARGET_IS_armpe
630 /* FIXME: we should be able to set the size of the interworking stub
633 Here we rummage through the found bfds to collect glue
634 information. FIXME: should this be based on a command line
635 option? krk@cygnus.com */
637 LANG_FOR_EACH_INPUT_STATEMENT (is)
639 if (!arm_process_before_allocation (is->the_bfd, & link_info))
641 einfo ("Errors encountered processing file %s", is->filename);
646 /* We have seen it all. Allocate it, and carry on */
647 arm_allocate_interworking_sections (& link_info);
648 #endif /* TARGET_IS_armpe */
649 #endif /* TARGET_IS_ppcpe */
651 sort_sections (stat_ptr->head);
653 before_allocation_default ();
656 /* Place an orphan section. We use this to put sections with a '\$' in them
657 into the right place. Any section with a '\$' in them (e.g. .text\$foo)
658 gets mapped to the output section with everything from the '\$' on stripped
660 See the Microsoft Portable Executable and Common Object File Format
661 Specification 4.1, section 4.2, Grouped Sections.
663 FIXME: This is now handled by the linker script using wildcards,
664 but I'm leaving this here in case we want to enable it for sections
665 which are not mentioned in the linker script. */
668 gld${EMULATION_NAME}_place_orphan (asection *s)
671 char *output_secname, *ps;
672 lang_output_section_statement_type *os;
673 lang_statement_union_type *l;
675 if ((s->flags & SEC_ALLOC) == 0)
678 /* Don't process grouped sections unless doing a final link.
679 If they're marked as COMDAT sections, we don't want .text\$foo to
680 end up in .text and then have .text disappear because it's marked
681 link-once-discard. */
682 if (link_info.relocatable)
685 secname = bfd_get_section_name (s->owner, s);
687 /* Everything from the '\$' on gets deleted so don't allow '\$' as the
689 if (*secname == '\$')
690 einfo ("%P%F: section %s has '\$' as first character\n", secname);
691 if (strchr (secname + 1, '\$') == NULL)
694 /* Look up the output section. The Microsoft specs say sections names in
695 image files never contain a '\$'. Fortunately, lang_..._lookup creates
696 the section if it doesn't exist. */
697 output_secname = xstrdup (secname);
698 ps = strchr (output_secname + 1, '\$');
700 os = lang_output_section_statement_lookup (output_secname);
702 /* Find the '\$' wild statement for this section. We currently require the
703 linker script to explicitly mention "*(.foo\$)".
704 FIXME: ppcpe.sc has .CRT\$foo in the .rdata section. According to the
705 Microsoft docs this isn't correct so it's not (currently) handled. */
709 for (l = os->children.head; l; l = l->header.next)
710 if (l->header.type == lang_wild_statement_enum)
712 struct wildcard_list *sec;
714 for (sec = l->wild_statement.section_list; sec; sec = sec->next)
715 if (sec->spec.name && strcmp (sec->spec.name, output_secname) == 0)
722 einfo ("%P%F: *(%s\$) missing from linker script\n", output_secname);
724 /* Link the input section in and we're done for now.
725 The sections still have to be sorted, but that has to wait until
726 all such sections have been processed by us. The sorting is done by
728 lang_add_section (&l->wild_statement.children, s, os);
734 gld_${EMULATION_NAME}_get_script (int *isfile)
736 # Scripts compiled in.
737 # sed commands to quote an ld script as a C string.
738 sc="-f stringify.sed"
744 if (link_info.relocatable && config.build_constructors)
747 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
748 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
749 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
750 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
751 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
752 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
753 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
754 echo ' ; else return' >> e${EMULATION_NAME}.c
755 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
756 echo '; }' >> e${EMULATION_NAME}.c
761 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
763 gld_${EMULATION_NAME}_before_parse,
767 gld_${EMULATION_NAME}_after_open,
768 after_allocation_default,
769 set_output_arch_default,
770 ldemul_default_target,
771 gld_${EMULATION_NAME}_before_allocation,
772 gld_${EMULATION_NAME}_get_script,
776 NULL, /* create output section statements */
777 NULL, /* open dynamic archive */
778 gld${EMULATION_NAME}_place_orphan,
779 gld_${EMULATION_NAME}_set_symbols,
780 NULL, /* parse_args */
781 gld${EMULATION_NAME}_add_options,
782 gld${EMULATION_NAME}_handle_option,
783 NULL, /* unrecognized file */
784 NULL, /* list options */
785 NULL, /* recognized file */
786 NULL, /* find_potential_libraries */
787 NULL /* new_vers_pattern */