# This shell script emits a C file. -*- C -*- # It does some substitutions. rm -f e${EMULATION_NAME}.c (echo;echo;echo;echo;echo)>e${EMULATION_NAME}.c # there, now line numbers match ;-) cat >>e${EMULATION_NAME}.c < Generate a base file for relocatable DLLs\n")); fprintf (file, _(" --dll Set image base to the default for DLLs\n")); fprintf (file, _(" --file-alignment Set file alignment\n")); fprintf (file, _(" --heap Set initial size of the heap\n")); fprintf (file, _(" --image-base
Set start address of the executable\n")); fprintf (file, _(" --major-image-version Set version number of the executable\n")); fprintf (file, _(" --major-os-version Set minimum required OS version\n")); fprintf (file, _(" --major-subsystem-version Set minimum required OS subsystem version\n")); fprintf (file, _(" --minor-image-version Set revision number of the executable\n")); fprintf (file, _(" --minor-os-version Set minimum required OS revision\n")); fprintf (file, _(" --minor-subsystem-version Set minimum required OS subsystem revision\n")); fprintf (file, _(" --section-alignment Set section alignment\n")); fprintf (file, _(" --stack Set size of the initial stack\n")); fprintf (file, _(" --subsystem [:] Set required OS subsystem [& version]\n")); fprintf (file, _(" --support-old-code Support interworking with old code\n")); fprintf (file, _(" --thumb-entry= Set the entry point to be Thumb \n")); #ifdef DLL_SUPPORT fprintf (file, _(" --add-stdcall-alias Export symbols with and without @nn\n")); fprintf (file, _(" --disable-stdcall-fixup Don't link _sym to _sym@nn\n")); fprintf (file, _(" --enable-stdcall-fixup Link _sym to _sym@nn without warnings\n")); fprintf (file, _(" --exclude-symbols sym,sym,... Exclude symbols from automatic export\n")); fprintf (file, _(" --export-all-symbols Automatically export all globals to DLL\n")); fprintf (file, _(" --kill-at Remove @nn from exported symbols\n")); fprintf (file, _(" --out-implib Generate import library\n")); fprintf (file, _(" --output-def Generate a .DEF file for the built DLL\n")); fprintf (file, _(" --warn-duplicate-exports Warn about duplicate exports.\n")); fprintf (file, _(" --compat-implib Create backward compatible import libs;\n")); fprintf (file, _(" create __imp_ as well.\n")); fprintf (file, _(" --enable-auto-image-base Automatically choose image base for DLLs\n")); fprintf (file, _(" unless user specifies one\n")); fprintf (file, _(" --disable-auto-image-base Do not auto-choose image base. (default)\n")); fprintf (file, _(" --dll-search-prefix= When linking dynamically to a dll witout an\n")); fprintf (file, _(" importlib, use .dll \n")); fprintf (file, _(" in preference to lib.dll \n")); #endif } static void set_pe_name (name, val) char *name; long val; { int i; /* Find the name and set it. */ for (i = 0; init[i].ptr; i++) { if (strcmp (name, init[i].symbol) == 0) { init[i].value = val; init[i].inited = 1; return; } } abort(); } static void set_pe_subsystem () { const char *sver; int len; int i; static const struct { const char *name; const int value; const char *entry; } v[] = { { "native", 1, "NtProcessStartup" }, #if defined TARGET_IS_mipspe || defined TARGET_IS_armpe { "windows", 2, "WinMainCRTStartup" }, #else { "windows", 2, "WinMainCRTStartup" }, #endif { "console", 3, "mainCRTStartup" }, #if 0 /* The Microsoft linker does not recognize this. */ { "os2", 5, "" }, #endif { "posix", 7, "__PosixProcessStartup"}, { "wince", 9, "_WinMainCRTStartup" }, { 0, 0, 0 } }; sver = strchr (optarg, ':'); if (sver == NULL) len = strlen (optarg); else { char *end; len = sver - optarg; set_pe_name ("__major_subsystem_version__", strtoul (sver + 1, &end, 0)); if (*end == '.') set_pe_name ("__minor_subsystem_version__", strtoul (end + 1, &end, 0)); if (*end != '\0') einfo (_("%P: warning: bad version number in -subsystem option\n")); } for (i = 0; v[i].name; i++) { if (strncmp (optarg, v[i].name, len) == 0 && v[i].name[len] == '\0') { const char *initial_symbol_char; const char *entry; set_pe_name ("__subsystem__", v[i].value); initial_symbol_char = ${INITIAL_SYMBOL_CHAR}; if (*initial_symbol_char == '\0') entry = v[i].entry; else { char *alc_entry; /* lang_add_entry expects its argument to be permanently allocated, so we don't free this string. */ alc_entry = xmalloc (strlen (initial_symbol_char) + strlen (v[i].entry) + 1); strcpy (alc_entry, initial_symbol_char); strcat (alc_entry, v[i].entry); entry = alc_entry; } lang_add_entry (entry, 1); return; } } einfo (_("%P%F: invalid subsystem type %s\n"), optarg); } static void set_pe_value (name) char *name; { char *end; set_pe_name (name, strtoul (optarg, &end, 0)); if (end == optarg) einfo (_("%P%F: invalid hex number for PE parameter '%s'\n"), optarg); optarg = end; } static void set_pe_stack_heap (resname, comname) char *resname; char *comname; { set_pe_value (resname); if (*optarg == ',') { optarg++; set_pe_value (comname); } else if (*optarg) einfo (_("%P%F: strange hex info for PE parameter '%s'\n"), optarg); } static int gld_${EMULATION_NAME}_parse_args(argc, argv) int argc; char **argv; { int longind; int optc; int prevoptind = optind; int prevopterr = opterr; int wanterror; static int lastoptind = -1; if (lastoptind != optind) opterr = 0; wanterror = opterr; lastoptind = optind; optc = getopt_long_only (argc, argv, "-", longopts, &longind); opterr = prevopterr; switch (optc) { default: if (wanterror) xexit (1); optind = prevoptind; return 0; case OPTION_BASE_FILE: link_info.base_file = (PTR) fopen (optarg, FOPEN_WB); if (link_info.base_file == NULL) { /* xgettext:c-format */ fprintf (stderr, _("%s: Can't open base file %s\n"), program_name, optarg); xexit (1); } break; /* PE options */ case OPTION_HEAP: set_pe_stack_heap ("__size_of_heap_reserve__", "__size_of_heap_commit__"); break; case OPTION_STACK: set_pe_stack_heap ("__size_of_stack_reserve__", "__size_of_stack_commit__"); break; case OPTION_SUBSYSTEM: set_pe_subsystem (); break; case OPTION_MAJOR_OS_VERSION: set_pe_value ("__major_os_version__"); break; case OPTION_MINOR_OS_VERSION: set_pe_value ("__minor_os_version__"); break; case OPTION_MAJOR_SUBSYSTEM_VERSION: set_pe_value ("__major_subsystem_version__"); break; case OPTION_MINOR_SUBSYSTEM_VERSION: set_pe_value ("__minor_subsystem_version__"); break; case OPTION_MAJOR_IMAGE_VERSION: set_pe_value ("__major_image_version__"); break; case OPTION_MINOR_IMAGE_VERSION: set_pe_value ("__minor_image_version__"); break; case OPTION_FILE_ALIGNMENT: set_pe_value ("__file_alignment__"); break; case OPTION_SECTION_ALIGNMENT: set_pe_value ("__section_alignment__"); break; case OPTION_DLL: set_pe_name ("__dll__", 1); break; case OPTION_IMAGE_BASE: set_pe_value ("__image_base__"); break; case OPTION_SUPPORT_OLD_CODE: support_old_code = 1; break; case OPTION_THUMB_ENTRY: thumb_entry_symbol = optarg; break; #ifdef DLL_SUPPORT case OPTION_OUT_DEF: pe_out_def_filename = xstrdup (optarg); break; case OPTION_EXPORT_ALL: pe_dll_export_everything = 1; break; case OPTION_EXCLUDE_SYMBOLS: pe_dll_add_excludes (optarg); break; case OPTION_KILL_ATS: pe_dll_kill_ats = 1; break; case OPTION_STDCALL_ALIASES: pe_dll_stdcall_aliases = 1; break; case OPTION_ENABLE_STDCALL_FIXUP: pe_enable_stdcall_fixup = 1; break; case OPTION_DISABLE_STDCALL_FIXUP: pe_enable_stdcall_fixup = 0; break; case OPTION_IMPLIB_FILENAME: pe_implib_filename = xstrdup (optarg); break; case OPTION_WARN_DUPLICATE_EXPORTS: pe_dll_warn_dup_exports = 1; break; case OPTION_IMP_COMPAT: pe_dll_compat_implib = 1; break; case OPTION_ENABLE_AUTO_IMAGE_BASE: pe_enable_auto_image_base = 1; break; case OPTION_DISABLE_AUTO_IMAGE_BASE: pe_enable_auto_image_base = 0; break; case OPTION_DLL_SEARCH_PREFIX: pe_dll_search_prefix = xstrdup( optarg ); break; case OPTION_NO_DEFAULT_EXCLUDES: pe_dll_do_default_excludes = 0; break; #endif } return 1; } #ifdef DLL_SUPPORT static unsigned long strhash (const char *str) { const unsigned char *s; unsigned long hash; unsigned int c; unsigned int len; hash = 0; len = 0; s = (const unsigned char *) str; while ((c = *s++) != '\0') { hash += c + (c << 17); hash ^= hash >> 2; ++len; } hash += len + (len << 17); hash ^= hash >> 2; return hash; } /* Use the output file to create a image base for relocatable DLLs. */ static unsigned long compute_dll_image_base (const char *ofile) { unsigned long hash = strhash (ofile); return 0x60000000 | ((hash << 16) & 0x0FFC0000); } #endif /* Assign values to the special symbols before the linker script is read. */ static void gld_${EMULATION_NAME}_set_symbols () { /* Run through and invent symbols for all the names and insert the defaults. */ int j; lang_statement_list_type *save; if (!init[IMAGEBASEOFF].inited) { if (link_info.relocateable) init[IMAGEBASEOFF].value = 0; else if (init[DLLOFF].value || link_info.shared) #ifdef DLL_SUPPORT init[IMAGEBASEOFF].value = (pe_enable_auto_image_base) ? compute_dll_image_base (output_filename) : NT_DLL_IMAGE_BASE; #else init[IMAGEBASEOFF].value = NT_DLL_IMAGE_BASE; #endif else init[IMAGEBASEOFF].value = NT_EXE_IMAGE_BASE; } /* Don't do any symbol assignments if this is a relocateable link. */ if (link_info.relocateable) return; /* Glue the assignments into the abs section */ save = stat_ptr; stat_ptr = &(abs_output_section->children); for (j = 0; init[j].ptr; j++) { long val = init[j].value; lang_assignment_statement_type *rv; rv = lang_add_assignment (exp_assop ('=' ,init[j].symbol, exp_intop (val))); if (init[j].size == sizeof(short)) *(short *)init[j].ptr = val; else if (init[j].size == sizeof(int)) *(int *)init[j].ptr = val; else if (init[j].size == sizeof(long)) *(long *)init[j].ptr = val; /* This might be a long long or other special type. */ else if (init[j].size == sizeof(bfd_vma)) *(bfd_vma *)init[j].ptr = val; else abort(); if (j == IMAGEBASEOFF) image_base_statement = rv; } /* Restore the pointer. */ stat_ptr = save; if (pe.FileAlignment > pe.SectionAlignment) { einfo (_("%P: warning, file alignment > section alignment.\n")); } } /* This is called after the linker script and the command line options have been read. */ static void gld_${EMULATION_NAME}_after_parse () { /* The Windows libraries are designed for the linker to treat the entry point as an undefined symbol. Otherwise, the .obj that defines mainCRTStartup is brought in because it is the first encountered in libc.lib and it has other symbols in it which will be pulled in by the link process. To avoid this, we act as though the user specified -u with the entry point symbol. This function is called after the linker script and command line options have been read, so at this point we know the right entry point. This function is called before the input files are opened, so registering the symbol as undefined will make a difference. */ if (! link_info.relocateable && entry_symbol != NULL) ldlang_add_undef (entry_symbol); } #ifdef DLL_SUPPORT static struct bfd_link_hash_entry *pe_undef_found_sym; static boolean pe_undef_cdecl_match (h, string) struct bfd_link_hash_entry *h; PTR string; { int sl = strlen (string); if (h->type == bfd_link_hash_defined && strncmp (h->root.string, string, sl) == 0 && h->root.string[sl] == '@') { pe_undef_found_sym = h; return false; } return true; } static void pe_fixup_stdcalls () { static int gave_warning_message = 0; struct bfd_link_hash_entry *undef, *sym; char *at; for (undef = link_info.hash->undefs; undef; undef=undef->next) if (undef->type == bfd_link_hash_undefined) { at = strchr (undef->root.string, '@'); if (at) { /* The symbol is a stdcall symbol, so let's look for a cdecl symbol with the same name and resolve to that */ char *cname = xstrdup (undef->root.string); at = strchr (cname, '@'); *at = 0; sym = bfd_link_hash_lookup (link_info.hash, cname, 0, 0, 1); if (sym && sym->type == bfd_link_hash_defined) { undef->type = bfd_link_hash_defined; undef->u.def.value = sym->u.def.value; undef->u.def.section = sym->u.def.section; if (pe_enable_stdcall_fixup == -1) { einfo (_("Warning: resolving %s by linking to %s\n"), undef->root.string, cname); if (! gave_warning_message) { gave_warning_message = 1; einfo(_("Use --enable-stdcall-fixup to disable these warnings\n")); einfo(_("Use --disable-stdcall-fixup to disable these fixups\n")); } } } } else { /* The symbol is a cdecl symbol, so we look for stdcall symbols - which means scanning the whole symbol table */ pe_undef_found_sym = 0; bfd_link_hash_traverse (link_info.hash, pe_undef_cdecl_match, (PTR) undef->root.string); sym = pe_undef_found_sym; if (sym) { undef->type = bfd_link_hash_defined; undef->u.def.value = sym->u.def.value; undef->u.def.section = sym->u.def.section; if (pe_enable_stdcall_fixup == -1) { einfo (_("Warning: resolving %s by linking to %s\n"), undef->root.string, sym->root.string); if (! gave_warning_message) { gave_warning_message = 1; einfo(_("Use --enable-stdcall-fixup to disable these warnings\n")); einfo(_("Use --disable-stdcall-fixup to disable these fixups\n")); } } } } } } #endif /* DLL_SUPPORT */ static void gld_${EMULATION_NAME}_after_open () { /* Pass the wacky PE command line options into the output bfd. FIXME: This should be done via a function, rather than by including an internal BFD header. */ if (!coff_data (output_bfd)->pe) einfo (_("%F%P: PE operations on non PE file.\n")); pe_data (output_bfd)->pe_opthdr = pe; pe_data (output_bfd)->dll = init[DLLOFF].value; #ifdef DLL_SUPPORT if (pe_enable_stdcall_fixup) /* -1=warn or 1=disable */ pe_fixup_stdcalls (); pe_process_import_defs(output_bfd, &link_info); if (link_info.shared) pe_dll_build_sections (output_bfd, &link_info); #ifndef TARGET_IS_i386pe #ifndef TARGET_IS_armpe else pe_exe_build_sections (output_bfd, &link_info); #endif #endif #endif #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe) if (strstr (bfd_get_target (output_bfd), "arm") == NULL) { /* The arm backend needs special fields in the output hash structure. These will only be created if the output format is an arm format, hence we do not support linking and changing output formats at the same time. Use a link followed by objcopy to change output formats. */ einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n"); return; } { /* Find a BFD that can hold the interworking stubs. */ LANG_FOR_EACH_INPUT_STATEMENT (is) { if (bfd_arm_pe_get_bfd_for_interworking (is->the_bfd, & link_info)) break; } } #endif { /* This next chunk of code tries to detect the case where you have two import libraries for the same DLL (specifically, symbolically linking libm.a and libc.a in cygwin to libcygwin.a). In those cases, it's possible for function thunks from the second implib to be used but without the head/tail objects, causing an improper import table. We detect those cases and rename the "other" import libraries to match the one the head/tail come from, so that the linker will sort things nicely and produce a valid import table. */ LANG_FOR_EACH_INPUT_STATEMENT (is) { if (is->the_bfd->my_archive) { int idata2 = 0, reloc_count=0, is_imp = 0; asection *sec; /* See if this is an import library thunk. */ for (sec = is->the_bfd->sections; sec; sec = sec->next) { if (strcmp (sec->name, ".idata\$2") == 0) idata2 = 1; if (strncmp (sec->name, ".idata\$", 7) == 0) is_imp = 1; reloc_count += sec->reloc_count; } if (is_imp && !idata2 && reloc_count) { /* It is, look for the reference to head and see if it's from our own library. */ for (sec = is->the_bfd->sections; sec; sec = sec->next) { int i; long symsize; long relsize; asymbol **symbols; arelent **relocs; int nrelocs; symsize = bfd_get_symtab_upper_bound (is->the_bfd); if (symsize < 1) break; relsize = bfd_get_reloc_upper_bound (is->the_bfd, sec); if (relsize < 1) break; symbols = (asymbol **) xmalloc (symsize); symsize = bfd_canonicalize_symtab (is->the_bfd, symbols); if (symsize < 0) { einfo ("%X%P: unable to process symbols: %E"); return; } relocs = (arelent **) xmalloc ((size_t) relsize); nrelocs = bfd_canonicalize_reloc (is->the_bfd, sec, relocs, symbols); if (nrelocs < 0) { free (relocs); einfo ("%X%P: unable to process relocs: %E"); return; } for (i = 0; i < nrelocs; i++) { struct symbol_cache_entry *s; struct bfd_link_hash_entry * blhe; bfd *other_bfd; char *n; s = (relocs[i]->sym_ptr_ptr)[0]; if (s->flags & BSF_LOCAL) continue; /* Thunk section with reloc to another bfd. */ blhe = bfd_link_hash_lookup (link_info.hash, s->name, false, false, true); if (blhe == NULL || blhe->type != bfd_link_hash_defined) continue; other_bfd = blhe->u.def.section->owner; if (strcmp (is->the_bfd->my_archive->filename, other_bfd->my_archive->filename) == 0) continue; /* Rename this implib to match the other. */ n = (char *) xmalloc (strlen (other_bfd->my_archive->filename) + 1); strcpy (n, other_bfd->my_archive->filename); is->the_bfd->my_archive->filename = n; } free (relocs); /* Note - we do not free the symbols, they are now cached in the BFD. */ } } } } } { int is_ms_arch = 0; bfd *cur_arch = 0; lang_input_statement_type *is2; /* Careful - this is a shell script. Watch those dollar signs! */ /* Microsoft import libraries have every member named the same, and not in the right order for us to link them correctly. We must detect these and rename the members so that they'll link correctly. There are three types of objects: the head, the thunks, and the sentinel(s). The head is easy; it's the one with idata2. We assume that the sentinels won't have relocs, and the thunks will. It's easier than checking the symbol table for external references. */ LANG_FOR_EACH_INPUT_STATEMENT (is) { if (is->the_bfd->my_archive) { bfd *arch = is->the_bfd->my_archive; if (cur_arch != arch) { cur_arch = arch; is_ms_arch = 1; for (is2 = is; is2 && is2->the_bfd->my_archive == arch; is2 = (lang_input_statement_type *)is2->next) { if (strcmp (is->the_bfd->filename, is2->the_bfd->filename)) is_ms_arch = 0; } } if (is_ms_arch) { int idata2 = 0, reloc_count=0; asection *sec; char *new_name, seq; for (sec = is->the_bfd->sections; sec; sec = sec->next) { if (strcmp (sec->name, ".idata\$2") == 0) idata2 = 1; reloc_count += sec->reloc_count; } if (idata2) /* .idata2 is the TOC */ seq = 'a'; else if (reloc_count > 0) /* thunks */ seq = 'b'; else /* sentinel */ seq = 'c'; new_name = xmalloc (strlen (is->the_bfd->filename) + 3); sprintf (new_name, "%s.%c", is->the_bfd->filename, seq); is->the_bfd->filename = new_name; new_name = xmalloc (strlen (is->filename) + 3); sprintf (new_name, "%s.%c", is->filename, seq); is->filename = new_name; } } } } } static void gld_${EMULATION_NAME}_before_allocation() { #ifdef TARGET_IS_ppcpe /* Here we rummage through the found bfds to collect toc information */ { LANG_FOR_EACH_INPUT_STATEMENT (is) { if (!ppc_process_before_allocation (is->the_bfd, &link_info)) { /* xgettext:c-format */ einfo (_("Errors encountered processing file %s\n"), is->filename); } } } /* We have seen it all. Allocate it, and carry on */ ppc_allocate_toc_section (&link_info); #endif /* TARGET_IS_ppcpe */ #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe) /* FIXME: we should be able to set the size of the interworking stub section. Here we rummage through the found bfds to collect glue information. FIXME: should this be based on a command line option? krk@cygnus.com */ { LANG_FOR_EACH_INPUT_STATEMENT (is) { if (! bfd_arm_pe_process_before_allocation (is->the_bfd, & link_info, support_old_code)) { /* xgettext:c-format */ einfo (_("Errors encountered processing file %s for interworking"), is->filename); } } } /* We have seen it all. Allocate it, and carry on */ bfd_arm_pe_allocate_interworking_sections (& link_info); #endif /* TARGET_IS_armpe */ } #ifdef DLL_SUPPORT /* This is called when an input file isn't recognized as a BFD. We check here for .DEF files and pull them in automatically. */ static int saw_option(char *option) { int i; for (i=0; init[i].ptr; i++) if (strcmp (init[i].symbol, option) == 0) return init[i].inited; return 0; } #endif /* DLL_SUPPORT */ static boolean gld_${EMULATION_NAME}_unrecognized_file(entry) lang_input_statement_type *entry ATTRIBUTE_UNUSED; { #ifdef DLL_SUPPORT const char *ext = entry->filename + strlen (entry->filename) - 4; if (strcmp (ext, ".def") == 0 || strcmp (ext, ".DEF") == 0) { if (pe_def_file == 0) pe_def_file = def_file_empty (); def_file_parse (entry->filename, pe_def_file); if (pe_def_file) { int i, buflen=0, len; char *buf; for (i=0; inum_exports; i++) { len = strlen(pe_def_file->exports[i].internal_name); if (buflen < len+2) buflen = len+2; } buf = (char *) xmalloc (buflen); for (i=0; inum_exports; i++) { struct bfd_link_hash_entry *h; sprintf(buf, "_%s", pe_def_file->exports[i].internal_name); h = bfd_link_hash_lookup (link_info.hash, buf, true, true, true); if (h == (struct bfd_link_hash_entry *) NULL) einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); if (h->type == bfd_link_hash_new) { h->type = bfd_link_hash_undefined; h->u.undef.abfd = NULL; bfd_link_add_undef (link_info.hash, h); } } free (buf); /* def_file_print (stdout, pe_def_file); */ if (pe_def_file->is_dll == 1) link_info.shared = 1; if (pe_def_file->base_address != (bfd_vma)(-1)) { pe.ImageBase = pe_data (output_bfd)->pe_opthdr.ImageBase = init[IMAGEBASEOFF].value = pe_def_file->base_address; init[IMAGEBASEOFF].inited = 1; if (image_base_statement) image_base_statement->exp = exp_assop ('=', "__image_base__", exp_intop (pe.ImageBase)); } #if 0 /* Not sure if these *should* be set */ if (pe_def_file->version_major != -1) { pe.MajorImageVersion = pe_def_file->version_major; pe.MinorImageVersion = pe_def_file->version_minor; } #endif if (pe_def_file->stack_reserve != -1 && ! saw_option ("__size_of_stack_reserve__")) { pe.SizeOfStackReserve = pe_def_file->stack_reserve; if (pe_def_file->stack_commit != -1) pe.SizeOfStackCommit = pe_def_file->stack_commit; } if (pe_def_file->heap_reserve != -1 && ! saw_option ("__size_of_heap_reserve__")) { pe.SizeOfHeapReserve = pe_def_file->heap_reserve; if (pe_def_file->heap_commit != -1) pe.SizeOfHeapCommit = pe_def_file->heap_commit; } return true; } } #endif return false; } static boolean gld_${EMULATION_NAME}_recognized_file(entry) lang_input_statement_type *entry ATTRIBUTE_UNUSED; { #ifdef DLL_SUPPORT #ifdef TARGET_IS_i386pe pe_dll_id_target ("pei-i386"); #endif #ifdef TARGET_IS_shpe pe_dll_id_target ("pei-shl"); #endif #ifdef TARGET_IS_mipspe pe_dll_id_target ("pei-mips"); #endif #ifdef TARGET_IS_armpe pe_dll_id_target ("pei-arm-little"); #endif if (bfd_get_format (entry->the_bfd) == bfd_object) { const char *ext = entry->filename + strlen (entry->filename) - 4; if (strcmp (ext, ".dll") == 0 || strcmp (ext, ".DLL") == 0) return pe_implied_import_dll (entry->filename); } #endif return false; } static void gld_${EMULATION_NAME}_finish () { #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe) struct bfd_link_hash_entry * h; if (thumb_entry_symbol != NULL) { h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, false, false, true); if (h != (struct bfd_link_hash_entry *) NULL && (h->type == bfd_link_hash_defined || h->type == bfd_link_hash_defweak) && h->u.def.section->output_section != NULL) { static char buffer[32]; bfd_vma val; /* Special procesing is required for a Thumb entry symbol. The bottom bit of its address must be set. */ val = (h->u.def.value + bfd_get_section_vma (output_bfd, h->u.def.section->output_section) + h->u.def.section->output_offset); val |= 1; /* Now convert this value into a string and store it in entry_symbol where the lang_finish() function will pick it up. */ buffer[0] = '0'; buffer[1] = 'x'; sprintf_vma (buffer + 2, val); if (entry_symbol != NULL && entry_from_cmdline) einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), thumb_entry_symbol, entry_symbol); entry_symbol = buffer; } else einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol); } #endif /* defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_epoc_pe) */ #ifdef DLL_SUPPORT if (link_info.shared) { pe_dll_fill_sections (output_bfd, &link_info); if (pe_implib_filename) pe_dll_generate_implib (pe_def_file, pe_implib_filename); } #if defined(TARGET_IS_shpe) || defined(TARGET_IS_mipspe) /* ARM doesn't need relocs. */ else { pe_exe_fill_sections (output_bfd, &link_info); } #endif if (pe_out_def_filename) pe_dll_generate_def_file (pe_out_def_filename); #endif /* DLL_SUPPORT */ } /* Place an orphan section. We use this to put sections in a reasonable place in the file, and to ensure that they are aligned as required. We handle grouped sections here as well. A section named .foo$nn goes into the output section .foo. All grouped sections are sorted by name. Grouped sections for the default sections are handled by the default linker script using wildcards, and are sorted by sort_sections. */ struct orphan_save { lang_output_section_statement_type *os; asection **section; lang_statement_union_type **stmt; }; /*ARGSUSED*/ static boolean gld_${EMULATION_NAME}_place_orphan (file, s) lang_input_statement_type *file; asection *s; { const char *secname; char *hold_section_name; char *dollar = NULL; const char *ps = NULL; lang_output_section_statement_type *os; lang_statement_list_type add_child; secname = bfd_get_section_name (s->owner, s); /* Look through the script to see where to place this section. */ hold_section_name = xstrdup (secname); if (!link_info.relocateable) { dollar = strchr (hold_section_name, '$'); if (dollar != NULL) *dollar = '\0'; } os = lang_output_section_find (hold_section_name); lang_list_init (&add_child); if (os != NULL && os->bfd_section != NULL && ((s->flags ^ os->bfd_section->flags) & (SEC_LOAD | SEC_ALLOC)) == 0) { wild_doit (&add_child, s, os, file); } else { struct orphan_save *place; static struct orphan_save hold_text; static struct orphan_save hold_rdata; static struct orphan_save hold_data; static struct orphan_save hold_bss; char *outsecname; lang_statement_list_type *old; lang_statement_list_type add; etree_type *address; /* Try to put the new output section in a reasonable place based on the section name and section flags. */ #define HAVE_SECTION(hold, name) \ (hold.os != NULL || (hold.os = lang_output_section_find (name)) != NULL) place = NULL; if ((s->flags & SEC_ALLOC) == 0) ; else if ((s->flags & SEC_HAS_CONTENTS) == 0 && HAVE_SECTION (hold_bss, ".bss")) place = &hold_bss; else if ((s->flags & SEC_READONLY) == 0 && HAVE_SECTION (hold_data, ".data")) place = &hold_data; else if ((s->flags & SEC_CODE) == 0 && (s->flags & SEC_READONLY) != 0 && HAVE_SECTION (hold_rdata, ".rdata")) place = &hold_rdata; else if ((s->flags & SEC_READONLY) != 0 && HAVE_SECTION (hold_text, ".text")) place = &hold_text; #undef HAVE_SECTION /* Choose a unique name for the section. This will be needed if the same section name appears in the input file with different loadable or allocateable characteristics. */ outsecname = xstrdup (hold_section_name); if (bfd_get_section_by_name (output_bfd, outsecname) != NULL) { unsigned int len; char *newname; unsigned int i; len = strlen (outsecname); newname = xmalloc (len + 5); strcpy (newname, outsecname); i = 0; do { sprintf (newname + len, "%d", i); ++i; } while (bfd_get_section_by_name (output_bfd, newname) != NULL); free (outsecname); outsecname = newname; } /* Start building a list of statements for this section. */ old = stat_ptr; stat_ptr = &add; lang_list_init (stat_ptr); if (config.build_constructors) { /* If the name of the section is representable in C, then create symbols to mark the start and the end of the section. */ for (ps = outsecname; *ps != '\0'; ps++) if (! isalnum ((unsigned char) *ps) && *ps != '_') break; if (*ps == '\0') { char *symname; etree_type *e_align; symname = (char *) xmalloc (ps - outsecname + sizeof "___start_"); sprintf (symname, "___start_%s", outsecname); e_align = exp_unop (ALIGN_K, exp_intop ((bfd_vma) 1 << s->alignment_power)); lang_add_assignment (exp_assop ('=', symname, e_align)); } } if (link_info.relocateable || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0) address = exp_intop ((bfd_vma) 0); else { /* All sections in an executable must be aligned to a page boundary. */ address = exp_unop (ALIGN_K, exp_nameop (NAME, "__section_alignment__")); } os = lang_enter_output_section_statement (outsecname, address, 0, (bfd_vma) 0, (etree_type *) NULL, (etree_type *) NULL, (etree_type *) NULL); wild_doit (&add_child, s, os, file); lang_leave_output_section_statement ((bfd_vma) 0, "*default*", (struct lang_output_section_phdr_list *) NULL, "*default*"); if (config.build_constructors && *ps == '\0') { char *symname; /* lang_leave_ouput_section_statement resets stat_ptr. Put stat_ptr back where we want it. */ if (place != NULL) stat_ptr = &add; symname = (char *) xmalloc (ps - outsecname + sizeof "___stop_"); sprintf (symname, "___stop_%s", outsecname); lang_add_assignment (exp_assop ('=', symname, exp_nameop (NAME, "."))); } stat_ptr = old; if (place != NULL) { asection *snew, **pps; snew = os->bfd_section; if (place->os->bfd_section != NULL || place->section != NULL) { /* Shuffle the section to make the output file look neater. */ if (place->section == NULL) { #if 0 /* Finding the end of the list is a little tricky. We make a wild stab at it by comparing section flags. */ flagword first_flags = place->os->bfd_section->flags; for (pps = &place->os->bfd_section->next; *pps != NULL && (*pps)->flags == first_flags; pps = &(*pps)->next) ; place->section = pps; #else /* Put orphans after the first section on the list. */ place->section = &place->os->bfd_section->next; #endif } /* Unlink the section. */ for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next) ; *pps = snew->next; /* Now tack it on to the "place->os" section list. */ snew->next = *place->section; *place->section = snew; } place->section = &snew->next; /* Save the end of this list. */ if (place->stmt == NULL) { /* Put the new statement list right at the head. */ *add.tail = place->os->header.next; place->os->header.next = add.head; } else { /* Put it after the last orphan statement we added. */ *add.tail = *place->stmt; *place->stmt = add.head; } place->stmt = add.tail; /* Save the end of this list. */ } } { lang_statement_union_type **pl = &os->children.head; if (dollar != NULL) { boolean found_dollar; /* The section name has a '$'. Sort it with the other '$' sections. */ found_dollar = false; for ( ; *pl != NULL; pl = &(*pl)->next) { lang_input_section_type *ls; const char *lname; if ((*pl)->header.type != lang_input_section_enum) continue; ls = &(*pl)->input_section; lname = bfd_get_section_name (ls->ifile->the_bfd, ls->section); if (strchr (lname, '$') == NULL) { if (found_dollar) break; } else { found_dollar = true; if (strcmp (secname, lname) < 0) break; } } } if (add_child.head != NULL) { add_child.head->next = *pl; *pl = add_child.head; } } free (hold_section_name); return true; } static boolean gld_${EMULATION_NAME}_open_dynamic_archive (arch, search, entry) const char * arch ATTRIBUTE_UNUSED; search_dirs_type * search; lang_input_statement_type * entry; { const char * filename; char * string; if (! entry->is_archive) return false; filename = entry->filename; string = (char *) xmalloc (strlen (search->name) + strlen (filename) + sizeof "/lib.a.dll" #ifdef DLL_SUPPORT + (pe_dll_search_prefix ? strlen (pe_dll_search_prefix) : 0) #endif + 1); /* Try "libfoo.dll.a" first (preferred explicit import library for dll's */ sprintf (string, "%s/lib%s.dll.a", search->name, filename); if (! ldfile_try_open_bfd (string, entry)) { /* Try "foo.dll.a" next (alternate explicit import library for dll's */ sprintf (string, "%s/%s.dll.a", search->name, filename); if (! ldfile_try_open_bfd (string, entry)) { /* Try libfoo.a next. Normally, this would be interpreted as a static library, but it *could* be an import library. For backwards compatibility, libfoo.a needs to ==precede== libfoo.dll and foo.dll in the search, or sometimes errors occur when building legacy packages. Putting libfoo.a here means that in a failure case (i.e. the library -lfoo is not found) we will search for libfoo.a twice before giving up -- once here, and once when searching for a "static" lib. for a "static" lib. */ /* Try "libfoo.a" (import lib, or static lib, but must take precedence over dll's) */ sprintf (string, "%s/lib%s.a", search->name, filename); if (! ldfile_try_open_bfd (string, entry)) { #ifdef DLL_SUPPORT if (pe_dll_search_prefix) { /* Try "foo.dll" (preferred dll name, if specified) */ sprintf (string, "%s/%s%s.dll", search->name, pe_dll_search_prefix, filename); if (! ldfile_try_open_bfd (string, entry)) { /* Try "libfoo.dll" (default preferred dll name) */ sprintf (string, "%s/lib%s.dll", search->name, filename); if (! ldfile_try_open_bfd (string, entry)) { /* Finally, try "foo.dll" (alternate dll name) */ sprintf (string, "%s/%s.dll", search->name, filename); if (! ldfile_try_open_bfd (string, entry)) { free (string); return false; } } } } else /* pe_dll_search_prefix not specified */ #endif { /* Try "libfoo.dll" (preferred dll name) */ sprintf (string, "%s/lib%s.dll", search->name, filename); if (! ldfile_try_open_bfd (string, entry)) { /* Finally, try "foo.dll" (alternate dll name) */ sprintf (string, "%s/%s.dll", search->name, filename); if (! ldfile_try_open_bfd (string, entry)) { free (string); return false; } } } } } } entry->filename = string; return true; } static int gld_${EMULATION_NAME}_find_potential_libraries (name, entry) char * name; lang_input_statement_type * entry; { return ldfile_open_file_search (name, entry, "", ".lib"); } static char * gld_${EMULATION_NAME}_get_script(isfile) int *isfile; EOF # Scripts compiled in. # sed commands to quote an ld script as a C string. sc="-f stringify.sed" cat >>e${EMULATION_NAME}.c <> e${EMULATION_NAME}.c echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c echo ' ; else return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c echo '; }' >> e${EMULATION_NAME}.c cat >>e${EMULATION_NAME}.c <