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_statement_union_type *const *ra = a;
397 const lang_statement_union_type *const *rb = b;
400 i = filename_cmp ((*ra)->input_section.section->owner->my_archive->filename,
401 (*rb)->input_section.section->owner->my_archive->filename);
405 i = filename_cmp ((*ra)->input_section.section->owner->filename,
406 (*rb)->input_section.section->owner->filename);
409 /* the tail idata4/5 are the only ones without relocs to an
410 idata$6 section unless we are importing by ordinal,
411 so sort them to last to terminate the IAT
412 and HNT properly. if no reloc this one is import by ordinal
413 so we have to sort by section contents */
415 if ((*ra)->input_section.section->reloc_count
416 + (*rb)->input_section.section->reloc_count)
418 i = ((*ra)->input_section.section->reloc_count
419 > (*rb)->input_section.section->reloc_count) ? -1 : 0;
423 return ((*ra)->input_section.section->reloc_count
424 > (*rb)->input_section.section->reloc_count) ? 0 : 1;
428 /* don't sort .idata$6 or .idata$7 FIXME dlltool eliminate .idata$7 */
429 if ((strcmp ((*ra)->input_section.section->name, ".idata$6") == 0))
432 if (!bfd_get_section_contents ((*ra)->input_section.section->owner,
433 (*ra)->input_section.section, &a_sec,
435 (bfd_size_type) sizeof(a_sec)))
436 einfo (_("%F%P: %pB: 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,
442 (bfd_size_type) sizeof(b_sec)))
443 einfo (_("%F%P: %pB: can't read contents of section .idata: %E\n"),
444 (*rb)->input_section.section->owner);
446 i = a_sec < b_sec ? -1 : 0;
449 return a_sec < b_sec ? 0 : 1;
455 sort_by_section_name (const void *a, const void *b)
457 const lang_statement_union_type *const *ra = a;
458 const lang_statement_union_type *const *rb = b;
460 i = strcmp ((*ra)->input_section.section->name,
461 (*rb)->input_section.section->name);
462 /* This is a hack to make .stab and .stabstr last, so we don't have
463 to fix strip/objcopy for .reloc sections.
464 FIXME stripping images with a .rsrc section still needs to be fixed. */
467 if ((CONST_STRNEQ ((*ra)->input_section.section->name, ".stab"))
468 && (! CONST_STRNEQ ((*rb)->input_section.section->name, ".stab")))
474 /* Subroutine of sort_sections to a contiguous subset of a list of sections.
475 NEXT_AFTER is the element after the last one to sort.
476 The result is a pointer to the last element's "next" pointer. */
478 static lang_statement_union_type **
479 sort_sections_1 (lang_statement_union_type **startptr,
480 lang_statement_union_type *next_after,
482 int (*sort_func) (const void *, const void *))
484 lang_statement_union_type **vec;
485 lang_statement_union_type *p;
487 lang_statement_union_type **ret;
492 vec = ((lang_statement_union_type **)
493 xmalloc (count * sizeof (lang_statement_union_type *)));
495 for (p = *startptr, i = 0; i < count; i++, p = p->header.next)
498 qsort (vec, count, sizeof (vec[0]), sort_func);
500 /* Fill in the next pointers again. */
502 for (i = 0; i < count - 1; i++)
503 vec[i]->header.next = vec[i + 1];
504 vec[i]->header.next = next_after;
505 ret = &vec[i]->header.next;
510 /* Sort the .idata\$foo input sections of archives into filename order.
511 The reason is so dlltool can arrange to have the pe dll import information
512 generated correctly - the head of the list goes into dh.o, the tail into
513 dt.o, and the guts into ds[nnnn].o. Note that this is only needed for the
515 FIXME: This may no longer be necessary with grouped sections. Instead of
516 sorting on dh.o, ds[nnnn].o, dt.o, one could, for example, have dh.o use
517 .idata\$4h, have ds[nnnn].o use .idata\$4s[nnnn], and have dt.o use .idata\$4t.
518 This would have to be elaborated upon to handle multiple dll's
519 [assuming such an eloboration is possible of course].
521 We also sort sections in '\$' wild statements. These are created by the
522 place_orphans routine to implement grouped sections. */
525 sort_sections (lang_statement_union_type *s)
527 for (; s ; s = s->header.next)
528 switch (s->header.type)
530 case lang_output_section_statement_enum:
531 sort_sections (s->output_section_statement.children.head);
533 case lang_wild_statement_enum:
535 lang_statement_union_type **p = &s->wild_statement.children.head;
536 struct wildcard_list *sec;
538 for (sec = s->wild_statement.section_list; sec; sec = sec->next)
540 /* Is this the .idata section? */
541 if (sec->spec.name != NULL
542 && CONST_STRNEQ (sec->spec.name, ".idata"))
544 /* Sort the children. We want to sort any objects in
545 the same archive. In order to handle the case of
546 including a single archive multiple times, we sort
547 all the children by archive name and then by object
548 name. After sorting them, we re-thread the pointer
553 lang_statement_union_type *start = *p;
554 if (start->header.type != lang_input_section_enum
555 || !start->input_section.section->owner->my_archive)
556 p = &(start->header.next);
559 lang_statement_union_type *end;
562 for (end = start, count = 0;
563 end && (end->header.type
564 == lang_input_section_enum);
565 end = end->header.next)
568 p = sort_sections_1 (p, end, count,
575 /* If this is a collection of grouped sections, sort them.
576 The linker script must explicitly mention "*(.foo\$)" or
577 "*(.foo\$*)". Don't sort them if \$ is not the last
578 character (not sure if this is really useful, but it
579 allows explicitly mentioning some \$ sections and letting
580 the linker handle the rest). */
581 if (sec->spec.name != NULL)
583 char *q = strchr (sec->spec.name, '\$');
587 || (q[1] == '*' && q[2] == '\0')))
589 lang_statement_union_type *end;
592 for (end = *p, count = 0; end; end = end->header.next)
594 if (end->header.type != lang_input_section_enum)
598 (void) sort_sections_1 (p, end, count,
599 sort_by_section_name);
612 gld_${EMULATION_NAME}_before_allocation (void)
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 (_("%P: errors encountered processing file %s\n"),
627 /* We have seen it all. Allocate it, and carry on */
628 ppc_allocate_toc_section (&link_info);
630 #ifdef TARGET_IS_armpe
631 /* FIXME: we should be able to set the size of the interworking stub
634 Here we rummage through the found bfds to collect glue
635 information. FIXME: should this be based on a command line
636 option? krk@cygnus.com */
638 LANG_FOR_EACH_INPUT_STATEMENT (is)
640 if (!arm_process_before_allocation (is->the_bfd, & link_info))
642 einfo (_("%P: errors encountered processing file %s\n"),
648 /* We have seen it all. Allocate it, and carry on */
649 arm_allocate_interworking_sections (& link_info);
650 #endif /* TARGET_IS_armpe */
651 #endif /* TARGET_IS_ppcpe */
653 sort_sections (stat_ptr->head);
655 before_allocation_default ();
658 /* Place an orphan section. We use this to put sections with a '\$' in them
659 into the right place. Any section with a '\$' in them (e.g. .text\$foo)
660 gets mapped to the output section with everything from the '\$' on stripped
662 See the Microsoft Portable Executable and Common Object File Format
663 Specification 4.1, section 4.2, Grouped Sections.
665 FIXME: This is now handled by the linker script using wildcards,
666 but I'm leaving this here in case we want to enable it for sections
667 which are not mentioned in the linker script. */
669 static lang_output_section_statement_type *
670 gld${EMULATION_NAME}_place_orphan (asection *s,
674 char *output_secname, *ps;
675 lang_output_section_statement_type *os;
676 lang_statement_union_type *l;
678 if ((s->flags & SEC_ALLOC) == 0)
681 /* Don't process grouped sections unless doing a final link.
682 If they're marked as COMDAT sections, we don't want .text\$foo to
683 end up in .text and then have .text disappear because it's marked
684 link-once-discard. */
685 if (bfd_link_relocatable (&link_info))
688 /* Everything from the '\$' on gets deleted so don't allow '\$' as the
690 if (*secname == '\$')
691 einfo (_("%F%P: section %s has '\$' as first character\n"), secname);
692 if (strchr (secname + 1, '\$') == NULL)
695 /* Look up the output section. The Microsoft specs say sections names in
696 image files never contain a '\$'. Fortunately, lang_..._lookup creates
697 the section if it doesn't exist. */
698 output_secname = xstrdup (secname);
699 ps = strchr (output_secname + 1, '\$');
701 os = lang_output_section_statement_lookup (output_secname, constraint, TRUE);
703 /* Find the '\$' wild statement for this section. We currently require the
704 linker script to explicitly mention "*(.foo\$)".
705 FIXME: ppcpe.sc has .CRT\$foo in the .rdata section. According to the
706 Microsoft docs this isn't correct so it's not (currently) handled. */
710 for (l = os->children.head; l; l = l->header.next)
711 if (l->header.type == lang_wild_statement_enum)
713 struct wildcard_list *sec;
715 for (sec = l->wild_statement.section_list; sec; sec = sec->next)
716 if (sec->spec.name && strcmp (sec->spec.name, output_secname) == 0)
723 einfo (_("%F%P: *(%s\$) missing from linker script\n"), output_secname);
725 /* Link the input section in and we're done for now.
726 The sections still have to be sorted, but that has to wait until
727 all such sections have been processed by us. The sorting is done by
729 lang_add_section (&l->wild_statement.children, s, NULL, os);
735 gld_${EMULATION_NAME}_get_script (int *isfile)
737 # Scripts compiled in.
738 # sed commands to quote an ld script as a C string.
739 sc="-f stringify.sed"
745 if (bfd_link_relocatable (&link_info) && config.build_constructors)
748 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
749 echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
750 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
751 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
752 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
753 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
754 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
755 echo ' ; else return' >> e${EMULATION_NAME}.c
756 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
757 echo '; }' >> e${EMULATION_NAME}.c
762 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
764 gld_${EMULATION_NAME}_before_parse,
768 gld_${EMULATION_NAME}_after_open,
769 after_check_relocs_default,
770 after_allocation_default,
771 set_output_arch_default,
772 ldemul_default_target,
773 gld_${EMULATION_NAME}_before_allocation,
774 gld_${EMULATION_NAME}_get_script,
778 NULL, /* create output section statements */
779 NULL, /* open dynamic archive */
780 gld${EMULATION_NAME}_place_orphan,
781 gld_${EMULATION_NAME}_set_symbols,
782 NULL, /* parse_args */
783 gld${EMULATION_NAME}_add_options,
784 gld${EMULATION_NAME}_handle_option,
785 NULL, /* unrecognized file */
786 NULL, /* list options */
787 NULL, /* recognized file */
788 NULL, /* find_potential_libraries */
789 NULL, /* new_vers_pattern */
790 NULL /* extra_map_file_text */