1 # This shell script emits a C file. -*- C -*-
2 # It does some substitutions.
3 if [ -z "$MACHINE" ]; then
6 OUTPUT_ARCH=${ARCH}:${MACHINE}
9 /* This file is part of GLD, the Gnu Linker.
10 Copyright (C) 1995-2019 Free Software Foundation, Inc.
12 This file is part of the GNU Binutils.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
27 MA 02110-1301, USA. */
31 /* The original file generated returned different default scripts depending
32 on whether certain switches were set, but these switches pertain to the
33 Linux system and that particular version of coff. In the NT case, we
34 only determine if the subsystem is console or windows in order to select
35 the correct entry point by default. */
41 #include "libiberty.h"
42 #include "filenames.h"
53 #include "coff/internal.h"
54 #include "../bfd/libcoff.h"
56 #define TARGET_IS_${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 (_("%F%P: invalid subsystem type %s\n"), optarg);
234 set_pe_value (char *name)
237 set_pe_name (name, strtoul (optarg, &end, 0));
240 einfo (_("%F%P: 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 (_("%F%P: 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 (bfd_link_relocatable (&link_info))
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 (bfd_link_relocatable (&link_info))
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),
352 if (init[j].size == sizeof(short))
353 *(short *)init[j].ptr = val;
354 else if (init[j].size == sizeof(int))
355 *(int *)init[j].ptr = val;
356 else if (init[j].size == sizeof(long))
357 *(long *)init[j].ptr = val;
358 /* This might be a long long or other special type. */
359 else if (init[j].size == sizeof(bfd_vma))
360 *(bfd_vma *)init[j].ptr = val;
363 /* Restore the pointer. */
366 if (pe.FileAlignment >
369 einfo (_("%P: warning, file alignment > section alignment\n"));
374 gld_${EMULATION_NAME}_after_open (void)
376 after_open_default ();
378 /* Pass the wacky PE command line options into the output bfd.
379 FIXME: This should be done via a function, rather than by
380 including an internal BFD header. */
381 if (!coff_data(link_info.output_bfd)->pe)
383 einfo (_("%F%P: PE operations on non PE file\n"));
386 pe_data(link_info.output_bfd)->pe_opthdr = pe;
387 pe_data(link_info.output_bfd)->dll = init[DLLOFF].value;
391 /* Callback functions for qsort in sort_sections. */
394 sort_by_file_name (const void *a, const void *b)
396 const lang_input_section_type *const *ra = a;
397 const lang_input_section_type *const *rb = b;
398 asection *sa = (*ra)->section;
399 asection *sb = (*rb)->section;
402 i = filename_cmp (sa->owner->my_archive->filename,
403 sb->owner->my_archive->filename);
407 i = filename_cmp (sa->owner->filename, sb->owner->filename);
410 /* the tail idata4/5 are the only ones without relocs to an
411 idata$6 section unless we are importing by ordinal,
412 so sort them to last to terminate the IAT
413 and HNT properly. if no reloc this one is import by ordinal
414 so we have to sort by section contents */
416 if (sa->reloc_count + sb->reloc_count != 0)
418 i = sa->reloc_count > sb->reloc_count ? -1 : 0;
422 return sa->reloc_count > sb->reloc_count ? 0 : 1;
426 /* don't sort .idata$6 or .idata$7 FIXME dlltool eliminate .idata$7 */
427 if ((strcmp (sa->name, ".idata$6") == 0))
430 if (!bfd_get_section_contents (sa->owner, sa, &a_sec, (file_ptr) 0,
431 (bfd_size_type) sizeof (a_sec)))
432 einfo (_("%F%P: %pB: can't read contents of section .idata: %E\n"),
435 if (!bfd_get_section_contents (sb->owner, sb, &b_sec, (file_ptr) 0,
436 (bfd_size_type) sizeof (b_sec)))
437 einfo (_("%F%P: %pB: can't read contents of section .idata: %E\n"),
440 i = a_sec < b_sec ? -1 : 0;
443 return a_sec < b_sec ? 0 : 1;
449 sort_by_section_name (const void *a, const void *b)
451 const lang_input_section_type *const *ra = a;
452 const lang_input_section_type *const *rb = b;
453 const char *sna = (*ra)->section->name;
454 const char *snb = (*rb)->section->name;
456 i = strcmp (sna, snb);
457 /* This is a hack to make .stab and .stabstr last, so we don't have
458 to fix strip/objcopy for .reloc sections.
459 FIXME stripping images with a .rsrc section still needs to be fixed. */
462 if ((CONST_STRNEQ (sna, ".stab"))
463 && (!CONST_STRNEQ (snb, ".stab")))
469 /* Subroutine of sort_sections to a contiguous subset of a list of sections.
470 NEXT_AFTER is the element after the last one to sort.
471 The result is a pointer to the last element's "next" pointer. */
473 static lang_statement_union_type **
474 sort_sections_1 (lang_statement_union_type **startptr,
475 lang_statement_union_type *next_after,
477 int (*sort_func) (const void *, const void *))
479 lang_statement_union_type **vec;
480 lang_statement_union_type *p;
482 lang_statement_union_type **ret;
487 vec = ((lang_statement_union_type **)
488 xmalloc (count * sizeof (lang_statement_union_type *)));
490 for (p = *startptr, i = 0; i < count; i++, p = p->header.next)
493 qsort (vec, count, sizeof (vec[0]), sort_func);
495 /* Fill in the next pointers again. */
497 for (i = 0; i < count - 1; i++)
498 vec[i]->header.next = vec[i + 1];
499 vec[i]->header.next = next_after;
500 ret = &vec[i]->header.next;
505 /* Sort the .idata\$foo input sections of archives into filename order.
506 The reason is so dlltool can arrange to have the pe dll import information
507 generated correctly - the head of the list goes into dh.o, the tail into
508 dt.o, and the guts into ds[nnnn].o. Note that this is only needed for the
510 FIXME: This may no longer be necessary with grouped sections. Instead of
511 sorting on dh.o, ds[nnnn].o, dt.o, one could, for example, have dh.o use
512 .idata\$4h, have ds[nnnn].o use .idata\$4s[nnnn], and have dt.o use .idata\$4t.
513 This would have to be elaborated upon to handle multiple dll's
514 [assuming such an eloboration is possible of course].
516 We also sort sections in '\$' wild statements. These are created by the
517 place_orphans routine to implement grouped sections. */
520 sort_sections (lang_statement_union_type *s)
522 for (; s ; s = s->header.next)
523 switch (s->header.type)
525 case lang_output_section_statement_enum:
526 sort_sections (s->output_section_statement.children.head);
528 case lang_wild_statement_enum:
530 lang_statement_union_type **p = &s->wild_statement.children.head;
531 struct wildcard_list *sec;
533 for (sec = s->wild_statement.section_list; sec; sec = sec->next)
535 /* Is this the .idata section? */
536 if (sec->spec.name != NULL
537 && CONST_STRNEQ (sec->spec.name, ".idata"))
539 /* Sort the children. We want to sort any objects in
540 the same archive. In order to handle the case of
541 including a single archive multiple times, we sort
542 all the children by archive name and then by object
543 name. After sorting them, we re-thread the pointer
548 lang_statement_union_type *start = *p;
549 if (start->header.type != lang_input_section_enum
550 || !start->input_section.section->owner->my_archive)
551 p = &(start->header.next);
554 lang_statement_union_type *end;
557 for (end = start, count = 0;
558 end && (end->header.type
559 == lang_input_section_enum);
560 end = end->header.next)
563 p = sort_sections_1 (p, end, count,
570 /* If this is a collection of grouped sections, sort them.
571 The linker script must explicitly mention "*(.foo\$)" or
572 "*(.foo\$*)". Don't sort them if \$ is not the last
573 character (not sure if this is really useful, but it
574 allows explicitly mentioning some \$ sections and letting
575 the linker handle the rest). */
576 if (sec->spec.name != NULL)
578 char *q = strchr (sec->spec.name, '\$');
582 || (q[1] == '*' && q[2] == '\0')))
584 lang_statement_union_type *end;
587 for (end = *p, count = 0; end; end = end->header.next)
589 if (end->header.type != lang_input_section_enum)
593 (void) sort_sections_1 (p, end, count,
594 sort_by_section_name);
607 gld_${EMULATION_NAME}_before_allocation (void)
609 #ifdef TARGET_IS_ppcpe
610 /* Here we rummage through the found bfds to collect toc information */
612 LANG_FOR_EACH_INPUT_STATEMENT (is)
614 if (!ppc_process_before_allocation(is->the_bfd, &link_info))
616 einfo (_("%P: errors encountered processing file %s\n"),
622 /* We have seen it all. Allocate it, and carry on */
623 ppc_allocate_toc_section (&link_info);
625 #ifdef TARGET_IS_armpe
626 /* FIXME: we should be able to set the size of the interworking stub
629 Here we rummage through the found bfds to collect glue
630 information. FIXME: should this be based on a command line
631 option? krk@cygnus.com */
633 LANG_FOR_EACH_INPUT_STATEMENT (is)
635 if (!arm_process_before_allocation (is->the_bfd, & link_info))
637 einfo (_("%P: errors encountered processing file %s\n"),
643 /* We have seen it all. Allocate it, and carry on */
644 arm_allocate_interworking_sections (& link_info);
645 #endif /* TARGET_IS_armpe */
646 #endif /* TARGET_IS_ppcpe */
648 sort_sections (stat_ptr->head);
650 before_allocation_default ();
653 /* Place an orphan section. We use this to put sections with a '\$' in them
654 into the right place. Any section with a '\$' in them (e.g. .text\$foo)
655 gets mapped to the output section with everything from the '\$' on stripped
657 See the Microsoft Portable Executable and Common Object File Format
658 Specification 4.1, section 4.2, Grouped Sections.
660 FIXME: This is now handled by the linker script using wildcards,
661 but I'm leaving this here in case we want to enable it for sections
662 which are not mentioned in the linker script. */
664 static lang_output_section_statement_type *
665 gld${EMULATION_NAME}_place_orphan (asection *s,
669 char *output_secname, *ps;
670 lang_output_section_statement_type *os;
671 lang_statement_union_type *l;
673 if ((s->flags & SEC_ALLOC) == 0)
676 /* Don't process grouped sections unless doing a final link.
677 If they're marked as COMDAT sections, we don't want .text\$foo to
678 end up in .text and then have .text disappear because it's marked
679 link-once-discard. */
680 if (bfd_link_relocatable (&link_info))
683 /* Everything from the '\$' on gets deleted so don't allow '\$' as the
685 if (*secname == '\$')
686 einfo (_("%F%P: section %s has '\$' as first character\n"), secname);
687 if (strchr (secname + 1, '\$') == NULL)
690 /* Look up the output section. The Microsoft specs say sections names in
691 image files never contain a '\$'. Fortunately, lang_..._lookup creates
692 the section if it doesn't exist. */
693 output_secname = xstrdup (secname);
694 ps = strchr (output_secname + 1, '\$');
696 os = lang_output_section_statement_lookup (output_secname, constraint, TRUE);
698 /* Find the '\$' wild statement for this section. We currently require the
699 linker script to explicitly mention "*(.foo\$)".
700 FIXME: ppcpe.sc has .CRT\$foo in the .rdata section. According to the
701 Microsoft docs this isn't correct so it's not (currently) handled. */
705 for (l = os->children.head; l; l = l->header.next)
706 if (l->header.type == lang_wild_statement_enum)
708 struct wildcard_list *sec;
710 for (sec = l->wild_statement.section_list; sec; sec = sec->next)
711 if (sec->spec.name && strcmp (sec->spec.name, output_secname) == 0)
718 einfo (_("%F%P: *(%s\$) missing from linker script\n"), output_secname);
720 /* Link the input section in and we're done for now.
721 The sections still have to be sorted, but that has to wait until
722 all such sections have been processed by us. The sorting is done by
724 lang_add_section (&l->wild_statement.children, s, NULL, os);
730 gld_${EMULATION_NAME}_get_script (int *isfile)
732 # Scripts compiled in.
733 # sed commands to quote an ld script as a C string.
734 sc="-f stringify.sed"
740 if (bfd_link_relocatable (&link_info) && config.build_constructors)
743 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
744 echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
745 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
746 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
747 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
748 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
749 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
750 echo ' ; else return' >> e${EMULATION_NAME}.c
751 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
752 echo '; }' >> e${EMULATION_NAME}.c
757 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
759 gld_${EMULATION_NAME}_before_parse,
763 gld_${EMULATION_NAME}_after_open,
764 after_check_relocs_default,
765 after_allocation_default,
766 set_output_arch_default,
767 ldemul_default_target,
768 gld_${EMULATION_NAME}_before_allocation,
769 gld_${EMULATION_NAME}_get_script,
773 NULL, /* create output section statements */
774 NULL, /* open dynamic archive */
775 gld${EMULATION_NAME}_place_orphan,
776 gld_${EMULATION_NAME}_set_symbols,
777 NULL, /* parse_args */
778 gld${EMULATION_NAME}_add_options,
779 gld${EMULATION_NAME}_handle_option,
780 NULL, /* unrecognized file */
781 NULL, /* list options */
782 NULL, /* recognized file */
783 NULL, /* find_potential_libraries */
784 NULL, /* new_vers_pattern */
785 NULL /* extra_map_file_text */