1 # This shell script emits a C file. -*- C -*-
2 # It does some substitutions.
3 if [ -z "$MACHINE" ]; then
6 OUTPUT_ARCH=${ARCH}:${MACHINE}
9 /* This file is part of GLD, the Gnu Linker.
10 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
11 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
13 This file is part of the GNU Binutils.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 3 of the License, or
18 (at your option) any later version.
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with this program; if not, write to the Free Software
27 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
28 MA 02110-1301, USA. */
32 /* The original file generated returned different default scripts depending
33 on whether certain switches were set, but these switches pertain to the
34 Linux system and that particular version of coff. In the NT case, we
35 only determine if the subsystem is console or windows in order to select
36 the correct entry point by default. */
42 #include "libiberty.h"
53 #include "coff/internal.h"
54 #include "../bfd/libcoff.h"
56 #define TARGET_IS_${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${EMULATION_NAME}_handle_option (int optc)
270 case OPTION_BASE_FILE:
271 link_info.base_file = fopen (optarg, FOPEN_WB);
272 if (link_info.base_file == NULL)
273 einfo (_("%F%P: cannot open base file %s\n"), optarg);
278 set_pe_stack_heap ("__size_of_heap_reserve__", "__size_of_heap_commit__");
281 set_pe_stack_heap ("__size_of_stack_reserve__", "__size_of_stack_commit__");
283 case OPTION_SUBSYSTEM:
286 case OPTION_MAJOR_OS_VERSION:
287 set_pe_value ("__major_os_version__");
289 case OPTION_MINOR_OS_VERSION:
290 set_pe_value ("__minor_os_version__");
292 case OPTION_MAJOR_SUBSYSTEM_VERSION:
293 set_pe_value ("__major_subsystem_version__");
295 case OPTION_MINOR_SUBSYSTEM_VERSION:
296 set_pe_value ("__minor_subsystem_version__");
298 case OPTION_MAJOR_IMAGE_VERSION:
299 set_pe_value ("__major_image_version__");
301 case OPTION_MINOR_IMAGE_VERSION:
302 set_pe_value ("__minor_image_version__");
304 case OPTION_FILE_ALIGNMENT:
305 set_pe_value ("__file_alignment__");
307 case OPTION_SECTION_ALIGNMENT:
308 set_pe_value ("__section_alignment__");
311 set_pe_name ("__dll__", 1);
313 case OPTION_IMAGE_BASE:
314 set_pe_value ("__image_base__");
320 /* Assign values to the special symbols before the linker script is
324 gld_${EMULATION_NAME}_set_symbols (void)
326 /* Run through and invent symbols for all the
327 names and insert the defaults. */
330 if (!init[IMAGEBASEOFF].inited)
332 if (link_info.relocatable)
333 init[IMAGEBASEOFF].value = 0;
334 else if (init[DLLOFF].value)
335 init[IMAGEBASEOFF].value = BEOS_DLL_IMAGE_BASE;
337 init[IMAGEBASEOFF].value = BEOS_EXE_IMAGE_BASE;
340 /* Don't do any symbol assignments if this is a relocatable link. */
341 if (link_info.relocatable)
344 /* Glue the assignments into the abs section */
345 push_stat_ptr (&abs_output_section->children);
347 for (j = 0; init[j].ptr; j++)
349 long val = init[j].value;
350 lang_add_assignment (exp_assign (init[j].symbol, exp_intop (val)));
351 if (init[j].size == sizeof(short))
352 *(short *)init[j].ptr = val;
353 else if (init[j].size == sizeof(int))
354 *(int *)init[j].ptr = val;
355 else if (init[j].size == sizeof(long))
356 *(long *)init[j].ptr = val;
357 /* This might be a long long or other special type. */
358 else if (init[j].size == sizeof(bfd_vma))
359 *(bfd_vma *)init[j].ptr = val;
362 /* Restore the pointer. */
365 if (pe.FileAlignment >
368 einfo ("%P: warning, file alignment > section alignment.\n");
373 gld_${EMULATION_NAME}_after_open (void)
375 after_open_default ();
377 /* Pass the wacky PE command line options into the output bfd.
378 FIXME: This should be done via a function, rather than by
379 including an internal BFD header. */
380 if (!coff_data(link_info.output_bfd)->pe)
382 einfo ("%F%P: PE operations on non PE file.\n");
385 pe_data(link_info.output_bfd)->pe_opthdr = pe;
386 pe_data(link_info.output_bfd)->dll = init[DLLOFF].value;
390 /* Callback functions for qsort in sort_sections. */
393 sort_by_file_name (const void *a, const void *b)
395 const lang_statement_union_type *const *ra = a;
396 const lang_statement_union_type *const *rb = b;
399 i = strcmp ((*ra)->input_section.section->owner->my_archive->filename,
400 (*rb)->input_section.section->owner->my_archive->filename);
404 i = strcmp ((*ra)->input_section.section->owner->filename,
405 (*rb)->input_section.section->owner->filename);
408 /* the tail idata4/5 are the only ones without relocs to an
409 idata$6 section unless we are importing by ordinal,
410 so sort them to last to terminate the IAT
411 and HNT properly. if no reloc this one is import by ordinal
412 so we have to sort by section contents */
414 if ( ((*ra)->input_section.section->reloc_count + (*rb)->input_section.section->reloc_count) )
416 i = (((*ra)->input_section.section->reloc_count >
417 (*rb)->input_section.section->reloc_count) ? -1 : 0);
421 return (((*ra)->input_section.section->reloc_count >
422 (*rb)->input_section.section->reloc_count) ? 0 : 1);
426 if ( (strcmp( (*ra)->input_section.section->name, ".idata$6") == 0) )
427 return 0; /* don't sort .idata$6 or .idata$7 FIXME dlltool eliminate .idata$7 */
429 if (! bfd_get_section_contents ((*ra)->input_section.section->owner,
430 (*ra)->input_section.section, &a_sec, (file_ptr) 0, (bfd_size_type)sizeof(a_sec)))
431 einfo ("%F%B: Can't read contents of section .idata: %E\n",
432 (*ra)->input_section.section->owner);
434 if (! bfd_get_section_contents ((*rb)->input_section.section->owner,
435 (*rb)->input_section.section, &b_sec, (file_ptr) 0, (bfd_size_type)sizeof(b_sec) ))
436 einfo ("%F%B: Can't read contents of section .idata: %E\n",
437 (*rb)->input_section.section->owner);
439 i = ((a_sec < b_sec) ? -1 : 0);
442 return ((a_sec < b_sec) ? 0 : 1);
448 sort_by_section_name (const void *a, const void *b)
450 const lang_statement_union_type *const *ra = a;
451 const lang_statement_union_type *const *rb = b;
453 i = strcmp ((*ra)->input_section.section->name,
454 (*rb)->input_section.section->name);
455 /* This is a hack to make .stab and .stabstr last, so we don't have
456 to fix strip/objcopy for .reloc sections.
457 FIXME stripping images with a .rsrc section still needs to be fixed. */
460 if ((CONST_STRNEQ ((*ra)->input_section.section->name, ".stab"))
461 && (! CONST_STRNEQ ((*rb)->input_section.section->name, ".stab")))
467 /* Subroutine of sort_sections to a contiguous subset of a list of sections.
468 NEXT_AFTER is the element after the last one to sort.
469 The result is a pointer to the last element's "next" pointer. */
471 static lang_statement_union_type **
472 sort_sections_1 (lang_statement_union_type **startptr,
473 lang_statement_union_type *next_after,
475 int (*sort_func) (const void *, const void *))
477 lang_statement_union_type **vec;
478 lang_statement_union_type *p;
480 lang_statement_union_type **ret;
485 vec = ((lang_statement_union_type **)
486 xmalloc (count * sizeof (lang_statement_union_type *)));
488 for (p = *startptr, i = 0; i < count; i++, p = p->header.next)
491 qsort (vec, count, sizeof (vec[0]), sort_func);
493 /* Fill in the next pointers again. */
495 for (i = 0; i < count - 1; i++)
496 vec[i]->header.next = vec[i + 1];
497 vec[i]->header.next = next_after;
498 ret = &vec[i]->header.next;
503 /* Sort the .idata\$foo input sections of archives into filename order.
504 The reason is so dlltool can arrange to have the pe dll import information
505 generated correctly - the head of the list goes into dh.o, the tail into
506 dt.o, and the guts into ds[nnnn].o. Note that this is only needed for the
508 FIXME: This may no longer be necessary with grouped sections. Instead of
509 sorting on dh.o, ds[nnnn].o, dt.o, one could, for example, have dh.o use
510 .idata\$4h, have ds[nnnn].o use .idata\$4s[nnnn], and have dt.o use .idata\$4t.
511 This would have to be elaborated upon to handle multiple dll's
512 [assuming such an eloboration is possible of course].
514 We also sort sections in '\$' wild statements. These are created by the
515 place_orphans routine to implement grouped sections. */
518 sort_sections (lang_statement_union_type *s)
520 for (; s ; s = s->header.next)
521 switch (s->header.type)
523 case lang_output_section_statement_enum:
524 sort_sections (s->output_section_statement.children.head);
526 case lang_wild_statement_enum:
528 lang_statement_union_type **p = &s->wild_statement.children.head;
529 struct wildcard_list *sec;
531 for (sec = s->wild_statement.section_list; sec; sec = sec->next)
533 /* Is this the .idata section? */
534 if (sec->spec.name != NULL
535 && CONST_STRNEQ (sec->spec.name, ".idata"))
537 /* Sort the children. We want to sort any objects in
538 the same archive. In order to handle the case of
539 including a single archive multiple times, we sort
540 all the children by archive name and then by object
541 name. After sorting them, we re-thread the pointer
546 lang_statement_union_type *start = *p;
547 if (start->header.type != lang_input_section_enum
548 || !start->input_section.section->owner->my_archive)
549 p = &(start->header.next);
552 lang_statement_union_type *end;
555 for (end = start, count = 0;
556 end && (end->header.type
557 == lang_input_section_enum);
558 end = end->header.next)
561 p = sort_sections_1 (p, end, count,
568 /* If this is a collection of grouped sections, sort them.
569 The linker script must explicitly mention "*(.foo\$)" or
570 "*(.foo\$*)". Don't sort them if \$ is not the last
571 character (not sure if this is really useful, but it
572 allows explicitly mentioning some \$ sections and letting
573 the linker handle the rest). */
574 if (sec->spec.name != NULL)
576 char *q = strchr (sec->spec.name, '\$');
580 || (q[1] == '*' && q[2] == '\0')))
582 lang_statement_union_type *end;
585 for (end = *p, count = 0; end; end = end->header.next)
587 if (end->header.type != lang_input_section_enum)
591 (void) sort_sections_1 (p, end, count,
592 sort_by_section_name);
605 gld_${EMULATION_NAME}_before_allocation (void)
607 #ifdef TARGET_IS_ppcpe
608 /* Here we rummage through the found bfds to collect toc information */
610 LANG_FOR_EACH_INPUT_STATEMENT (is)
612 if (!ppc_process_before_allocation(is->the_bfd, &link_info))
614 einfo("Errors encountered processing file %s\n", is->filename);
619 /* We have seen it all. Allocate it, and carry on */
620 ppc_allocate_toc_section (&link_info);
622 #ifdef TARGET_IS_armpe
623 /* FIXME: we should be able to set the size of the interworking stub
626 Here we rummage through the found bfds to collect glue
627 information. FIXME: should this be based on a command line
628 option? krk@cygnus.com */
630 LANG_FOR_EACH_INPUT_STATEMENT (is)
632 if (!arm_process_before_allocation (is->the_bfd, & link_info))
634 einfo ("Errors encountered processing file %s", is->filename);
639 /* We have seen it all. Allocate it, and carry on */
640 arm_allocate_interworking_sections (& link_info);
641 #endif /* TARGET_IS_armpe */
642 #endif /* TARGET_IS_ppcpe */
644 sort_sections (stat_ptr->head);
646 before_allocation_default ();
649 /* Place an orphan section. We use this to put sections with a '\$' in them
650 into the right place. Any section with a '\$' in them (e.g. .text\$foo)
651 gets mapped to the output section with everything from the '\$' on stripped
653 See the Microsoft Portable Executable and Common Object File Format
654 Specification 4.1, section 4.2, Grouped Sections.
656 FIXME: This is now handled by the linker script using wildcards,
657 but I'm leaving this here in case we want to enable it for sections
658 which are not mentioned in the linker script. */
660 static lang_output_section_statement_type *
661 gld${EMULATION_NAME}_place_orphan (asection *s,
665 char *output_secname, *ps;
666 lang_output_section_statement_type *os;
667 lang_statement_union_type *l;
669 if ((s->flags & SEC_ALLOC) == 0)
672 /* Don't process grouped sections unless doing a final link.
673 If they're marked as COMDAT sections, we don't want .text\$foo to
674 end up in .text and then have .text disappear because it's marked
675 link-once-discard. */
676 if (link_info.relocatable)
679 /* Everything from the '\$' on gets deleted so don't allow '\$' as the
681 if (*secname == '\$')
682 einfo ("%P%F: section %s has '\$' as first character\n", secname);
683 if (strchr (secname + 1, '\$') == NULL)
686 /* Look up the output section. The Microsoft specs say sections names in
687 image files never contain a '\$'. Fortunately, lang_..._lookup creates
688 the section if it doesn't exist. */
689 output_secname = xstrdup (secname);
690 ps = strchr (output_secname + 1, '\$');
692 os = lang_output_section_statement_lookup (output_secname, constraint, TRUE);
694 /* Find the '\$' wild statement for this section. We currently require the
695 linker script to explicitly mention "*(.foo\$)".
696 FIXME: ppcpe.sc has .CRT\$foo in the .rdata section. According to the
697 Microsoft docs this isn't correct so it's not (currently) handled. */
701 for (l = os->children.head; l; l = l->header.next)
702 if (l->header.type == lang_wild_statement_enum)
704 struct wildcard_list *sec;
706 for (sec = l->wild_statement.section_list; sec; sec = sec->next)
707 if (sec->spec.name && strcmp (sec->spec.name, output_secname) == 0)
714 einfo ("%P%F: *(%s\$) missing from linker script\n", output_secname);
716 /* Link the input section in and we're done for now.
717 The sections still have to be sorted, but that has to wait until
718 all such sections have been processed by us. The sorting is done by
720 lang_add_section (&l->wild_statement.children, s, os);
726 gld_${EMULATION_NAME}_get_script (int *isfile)
728 # Scripts compiled in.
729 # sed commands to quote an ld script as a C string.
730 sc="-f stringify.sed"
736 if (link_info.relocatable && config.build_constructors)
739 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
740 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
741 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
742 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
743 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
744 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
745 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
746 echo ' ; else return' >> e${EMULATION_NAME}.c
747 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
748 echo '; }' >> e${EMULATION_NAME}.c
753 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
755 gld_${EMULATION_NAME}_before_parse,
759 gld_${EMULATION_NAME}_after_open,
760 after_allocation_default,
761 set_output_arch_default,
762 ldemul_default_target,
763 gld_${EMULATION_NAME}_before_allocation,
764 gld_${EMULATION_NAME}_get_script,
768 NULL, /* create output section statements */
769 NULL, /* open dynamic archive */
770 gld${EMULATION_NAME}_place_orphan,
771 gld_${EMULATION_NAME}_set_symbols,
772 NULL, /* parse_args */
773 gld${EMULATION_NAME}_add_options,
774 gld${EMULATION_NAME}_handle_option,
775 NULL, /* unrecognized file */
776 NULL, /* list options */
777 NULL, /* recognized file */
778 NULL, /* find_potential_libraries */
779 NULL /* new_vers_pattern */