1 # This shell script emits a C file. -*- C -*-
2 # It does some substitutions.
3 if [ -z "$MACHINE" ]; then
6 OUTPUT_ARCH=${ARCH}:${MACHINE}
9 /* This file is part of GLD, the Gnu Linker.
10 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
11 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
13 This file is part of the GNU Binutils.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 3 of the License, or
18 (at your option) any later version.
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with this program; if not, write to the Free Software
27 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
28 MA 02110-1301, USA. */
32 /* The original file generated returned different default scripts depending
33 on whether certain switches were set, but these switches pertain to the
34 Linux system and that particular version of coff. In the NT case, we
35 only determine if the subsystem is console or windows in order to select
36 the correct entry point by default. */
42 #include "libiberty.h"
53 #include "coff/internal.h"
54 #include "../bfd/libcoff.h"
56 #define TARGET_IS_${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. */
334 if (!init[IMAGEBASEOFF].inited)
336 if (link_info.relocatable)
337 init[IMAGEBASEOFF].value = 0;
338 else if (init[DLLOFF].value)
339 init[IMAGEBASEOFF].value = BEOS_DLL_IMAGE_BASE;
341 init[IMAGEBASEOFF].value = BEOS_EXE_IMAGE_BASE;
344 /* Don't do any symbol assignments if this is a relocatable link. */
345 if (link_info.relocatable)
348 /* Glue the assignments into the abs section */
349 push_stat_ptr (&abs_output_section->children);
351 for (j = 0; init[j].ptr; j++)
353 long val = init[j].value;
354 lang_add_assignment (exp_assop ('=', init[j].symbol, exp_intop (val)));
355 if (init[j].size == sizeof(short))
356 *(short *)init[j].ptr = val;
357 else if (init[j].size == sizeof(int))
358 *(int *)init[j].ptr = val;
359 else if (init[j].size == sizeof(long))
360 *(long *)init[j].ptr = val;
361 /* This might be a long long or other special type. */
362 else if (init[j].size == sizeof(bfd_vma))
363 *(bfd_vma *)init[j].ptr = val;
366 /* Restore the pointer. */
369 if (pe.FileAlignment >
372 einfo ("%P: warning, file alignment > section alignment.\n");
377 gld_${EMULATION_NAME}_after_open (void)
379 /* Pass the wacky PE command line options into the output bfd.
380 FIXME: This should be done via a function, rather than by
381 including an internal BFD header. */
382 if (!coff_data(link_info.output_bfd)->pe)
384 einfo ("%F%P: PE operations on non PE file.\n");
387 pe_data(link_info.output_bfd)->pe_opthdr = pe;
388 pe_data(link_info.output_bfd)->dll = init[DLLOFF].value;
392 /* Callback functions for qsort in sort_sections. */
395 sort_by_file_name (const void *a, const void *b)
397 const lang_statement_union_type *const *ra = a;
398 const lang_statement_union_type *const *rb = b;
401 i = strcmp ((*ra)->input_section.section->owner->my_archive->filename,
402 (*rb)->input_section.section->owner->my_archive->filename);
406 i = strcmp ((*ra)->input_section.section->owner->filename,
407 (*rb)->input_section.section->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 ( ((*ra)->input_section.section->reloc_count + (*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 if ( (strcmp( (*ra)->input_section.section->name, ".idata$6") == 0) )
429 return 0; /* don't sort .idata$6 or .idata$7 FIXME dlltool eliminate .idata$7 */
431 if (! bfd_get_section_contents ((*ra)->input_section.section->owner,
432 (*ra)->input_section.section, &a_sec, (file_ptr) 0, (bfd_size_type)sizeof(a_sec)))
433 einfo ("%F%B: Can't read contents of section .idata: %E\n",
434 (*ra)->input_section.section->owner);
436 if (! bfd_get_section_contents ((*rb)->input_section.section->owner,
437 (*rb)->input_section.section, &b_sec, (file_ptr) 0, (bfd_size_type)sizeof(b_sec) ))
438 einfo ("%F%B: Can't read contents of section .idata: %E\n",
439 (*rb)->input_section.section->owner);
441 i = ((a_sec < b_sec) ? -1 : 0);
444 return ((a_sec < b_sec) ? 0 : 1);
450 sort_by_section_name (const void *a, const void *b)
452 const lang_statement_union_type *const *ra = a;
453 const lang_statement_union_type *const *rb = b;
455 i = strcmp ((*ra)->input_section.section->name,
456 (*rb)->input_section.section->name);
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 ((*ra)->input_section.section->name, ".stab"))
463 && (! CONST_STRNEQ ((*rb)->input_section.section->name, ".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("Errors encountered processing file %s\n", is->filename);
621 /* We have seen it all. Allocate it, and carry on */
622 ppc_allocate_toc_section (&link_info);
624 #ifdef TARGET_IS_armpe
625 /* FIXME: we should be able to set the size of the interworking stub
628 Here we rummage through the found bfds to collect glue
629 information. FIXME: should this be based on a command line
630 option? krk@cygnus.com */
632 LANG_FOR_EACH_INPUT_STATEMENT (is)
634 if (!arm_process_before_allocation (is->the_bfd, & link_info))
636 einfo ("Errors encountered processing file %s", is->filename);
641 /* We have seen it all. Allocate it, and carry on */
642 arm_allocate_interworking_sections (& link_info);
643 #endif /* TARGET_IS_armpe */
644 #endif /* TARGET_IS_ppcpe */
646 sort_sections (stat_ptr->head);
648 before_allocation_default ();
651 /* Place an orphan section. We use this to put sections with a '\$' in them
652 into the right place. Any section with a '\$' in them (e.g. .text\$foo)
653 gets mapped to the output section with everything from the '\$' on stripped
655 See the Microsoft Portable Executable and Common Object File Format
656 Specification 4.1, section 4.2, Grouped Sections.
658 FIXME: This is now handled by the linker script using wildcards,
659 but I'm leaving this here in case we want to enable it for sections
660 which are not mentioned in the linker script. */
663 gld${EMULATION_NAME}_place_orphan (asection *s,
667 char *output_secname, *ps;
668 lang_output_section_statement_type *os;
669 lang_statement_union_type *l;
671 if ((s->flags & SEC_ALLOC) == 0)
674 /* Don't process grouped sections unless doing a final link.
675 If they're marked as COMDAT sections, we don't want .text\$foo to
676 end up in .text and then have .text disappear because it's marked
677 link-once-discard. */
678 if (link_info.relocatable)
681 /* Everything from the '\$' on gets deleted so don't allow '\$' as the
683 if (*secname == '\$')
684 einfo ("%P%F: section %s has '\$' as first character\n", secname);
685 if (strchr (secname + 1, '\$') == NULL)
688 /* Look up the output section. The Microsoft specs say sections names in
689 image files never contain a '\$'. Fortunately, lang_..._lookup creates
690 the section if it doesn't exist. */
691 output_secname = xstrdup (secname);
692 ps = strchr (output_secname + 1, '\$');
694 os = lang_output_section_statement_lookup (output_secname, constraint, TRUE);
696 /* Find the '\$' wild statement for this section. We currently require the
697 linker script to explicitly mention "*(.foo\$)".
698 FIXME: ppcpe.sc has .CRT\$foo in the .rdata section. According to the
699 Microsoft docs this isn't correct so it's not (currently) handled. */
703 for (l = os->children.head; l; l = l->header.next)
704 if (l->header.type == lang_wild_statement_enum)
706 struct wildcard_list *sec;
708 for (sec = l->wild_statement.section_list; sec; sec = sec->next)
709 if (sec->spec.name && strcmp (sec->spec.name, output_secname) == 0)
716 einfo ("%P%F: *(%s\$) missing from linker script\n", output_secname);
718 /* Link the input section in and we're done for now.
719 The sections still have to be sorted, but that has to wait until
720 all such sections have been processed by us. The sorting is done by
722 lang_add_section (&l->wild_statement.children, s, os);
728 gld_${EMULATION_NAME}_get_script (int *isfile)
730 # Scripts compiled in.
731 # sed commands to quote an ld script as a C string.
732 sc="-f stringify.sed"
738 if (link_info.relocatable && config.build_constructors)
741 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
742 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
743 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
744 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
745 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
746 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
747 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
748 echo ' ; else return' >> e${EMULATION_NAME}.c
749 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
750 echo '; }' >> e${EMULATION_NAME}.c
755 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
757 gld_${EMULATION_NAME}_before_parse,
761 gld_${EMULATION_NAME}_after_open,
762 after_allocation_default,
763 set_output_arch_default,
764 ldemul_default_target,
765 gld_${EMULATION_NAME}_before_allocation,
766 gld_${EMULATION_NAME}_get_script,
770 NULL, /* create output section statements */
771 NULL, /* open dynamic archive */
772 gld${EMULATION_NAME}_place_orphan,
773 gld_${EMULATION_NAME}_set_symbols,
774 NULL, /* parse_args */
775 gld${EMULATION_NAME}_add_options,
776 gld${EMULATION_NAME}_handle_option,
777 NULL, /* unrecognized file */
778 NULL, /* list options */
779 NULL, /* recognized file */
780 NULL, /* find_potential_libraries */
781 NULL /* new_vers_pattern */