# This shell script emits a C file. -*- C -*- # It does some substitutions. if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH} else OUTPUT_ARCH=${ARCH}:${MACHINE} fi case ${target} in *-*-cygwin*) cygwin_behavior=1 ;; *) cygwin_behavior=0; ;; esac rm -f e${EMULATION_NAME}.c (echo;echo;echo;echo;echo)>e${EMULATION_NAME}.c # there, now line numbers match ;-) fragment < #include "ldlex.h" #include "ldmisc.h" #include "ldctor.h" #include "ldbuildid.h" #include "coff/internal.h" EOF case ${target} in x86_64-*-mingw* | x86_64-*-pe | x86_64-*-pep | x86_64-*-cygwin | \ i[3-7]86-*-mingw32* | i[3-7]86-*-cygwin* | i[3-7]86-*-winnt | i[3-7]86-*-pe) fragment < 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, _(" --[no-]leading-underscore Set explicit symbol underscore prefix mode\n")); fprintf (file, _(" --thumb-entry= Set the entry point to be Thumb \n")); fprintf (file, _(" --[no-]insert-timestamp Use a real timestamp rather than zero (default).\n")); fprintf (file, _(" This makes binaries non-deterministic\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, _(" --exclude-all-symbols Exclude all symbols from automatic export\n")); fprintf (file, _(" --exclude-libs lib,lib,... Exclude libraries from automatic export\n")); fprintf (file, _(" --exclude-modules-for-implib mod,mod,...\n")); fprintf (file, _(" Exclude objects, archive members from auto\n")); fprintf (file, _(" export, place into import library instead.\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, _(" --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\ create __imp_ as well.\n")); fprintf (file, _(" --enable-auto-image-base[=
] Automatically choose image base for DLLs\n\ (optionally starting with address) unless\n\ specifically set with --image-base\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 without\n\ an importlib, use .dll\n\ in preference to lib.dll \n")); fprintf (file, _(" --enable-auto-import Do sophisticated linking of _sym to\n\ __imp_sym for DATA references\n")); fprintf (file, _(" --disable-auto-import Do not auto-import DATA items from DLLs\n")); fprintf (file, _(" --enable-runtime-pseudo-reloc Work around auto-import limitations by\n\ adding pseudo-relocations resolved at\n\ runtime.\n")); fprintf (file, _(" --disable-runtime-pseudo-reloc Do not add runtime pseudo-relocations for\n\ auto-imported DATA.\n")); fprintf (file, _(" --enable-extra-pe-debug Enable verbose debug output when building\n\ or linking to DLLs (esp. auto-import)\n")); #endif fprintf (file, _(" --large-address-aware Executable supports virtual addresses\n\ greater than 2 gigabytes\n")); fprintf (file, _(" --disable-large-address-aware Executable does not support virtual\n\ addresses greater than 2 gigabytes\n")); fprintf (file, _(" --enable-long-section-names Use long COFF section names even in\n\ executable image files\n")); fprintf (file, _(" --disable-long-section-names Never use long COFF section names, even\n\ in object files\n")); fprintf (file, _(" --[disable-]dynamicbase Image base address may be relocated using\n\ address space layout randomization (ASLR)\n")); fprintf (file, _(" --enable-reloc-section Create the base relocation table\n")); fprintf (file, _(" --disable-reloc-section Do not create the base relocation table\n")); fprintf (file, _(" --[disable-]forceinteg Code integrity checks are enforced\n")); fprintf (file, _(" --[disable-]nxcompat Image is compatible with data execution\n\ prevention\n")); fprintf (file, _(" --[disable-]no-isolation Image understands isolation but do not\n\ isolate the image\n")); fprintf (file, _(" --[disable-]no-seh Image does not use SEH. No SE handler may\n\ be called in this image\n")); fprintf (file, _(" --[disable-]no-bind Do not bind this image\n")); fprintf (file, _(" --[disable-]wdmdriver Driver uses the WDM model\n")); fprintf (file, _(" --[disable-]tsaware Image is Terminal Server aware\n")); fprintf (file, _(" --build-id[=STYLE] Generate build ID\n")); #ifdef PDB_H fprintf (file, _(" --pdb=[FILENAME] Generate PDB file\n")); #endif } /* A case insensitive comparison, regardless of the host platform, used for comparing file extensions. */ static int fileext_cmp (const char *s1, const char *s2) { for (;;) { int c1 = TOLOWER (*s1++); int c2 = *s2++; /* Assumed to be lower case from the caller. */ if (c1 != c2) return (c1 - c2); if (c1 == '\0') return 0; } } static void set_pe_name (char *name, long val) { int i; is_underscoring (); /* Find the name and set it. */ for (i = 0; init[i].ptr; i++) { if (strcmp (name, GET_INIT_SYMBOL_NAME (i)) == 0) { init[i].value = val; init[i].inited = 1; if (strcmp (name,"__image_base__") == 0) set_pe_name (U ("__ImageBase"), val); return; } } abort (); } static void set_entry_point (void) { const char *entry; const char *initial_symbol_char; int i; static const struct { const int value; const char *entry; } v[] = { { 1, "NtProcessStartup" }, { 2, "WinMainCRTStartup" }, { 3, "mainCRTStartup" }, { 7, "__PosixProcessStartup"}, { 9, "WinMainCRTStartup" }, {14, "mainCRTStartup" }, { 0, NULL } }; /* Entry point name for arbitrary subsystem numbers. */ static const char default_entry[] = "mainCRTStartup"; if (bfd_link_dll (&link_info) || dll) { #if defined (TARGET_IS_i386pe) entry = "DllMainCRTStartup@12"; #else entry = "DllMainCRTStartup"; #endif } else { for (i = 0; v[i].entry; i++) if (v[i].value == pe_subsystem) break; /* If no match, use the default. */ if (v[i].entry != NULL) entry = v[i].entry; else entry = default_entry; } initial_symbol_char = (is_underscoring () != 0 ? "_" : ""); if (*initial_symbol_char != '\0') { char *alc_entry; /* lang_default_entry expects its argument to be permanently allocated, so we don't free this string. */ alc_entry = xmalloc (strlen (initial_symbol_char) + strlen (entry) + 1); strcpy (alc_entry, initial_symbol_char); strcat (alc_entry, entry); entry = alc_entry; } lang_default_entry (entry); if (bfd_link_executable (&link_info) && ! entry_from_cmdline) ldlang_add_undef (entry, false); } static void set_pe_subsystem (void) { const char *sver; char *end; int len; int i; unsigned long temp_subsystem; static const struct { const char *name; const int value; } v[] = { { "native", 1}, { "windows", 2}, { "console", 3}, { "posix", 7}, { "wince", 9}, { "xbox", 14}, { NULL, 0 } }; /* Check for the presence of a version number. */ sver = strchr (optarg, ':'); if (sver == NULL) len = strlen (optarg); else { 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")); } /* Check for numeric subsystem. */ temp_subsystem = strtoul (optarg, & end, 0); if ((*end == ':' || *end == '\0') && (temp_subsystem < 65536)) { /* Search list for a numeric match to use its entry point. */ for (i = 0; v[i].name; i++) if (v[i].value == (int) temp_subsystem) break; /* Use this subsystem. */ pe_subsystem = (int) temp_subsystem; } else { /* Search for subsystem by name. */ for (i = 0; v[i].name; i++) if (strncmp (optarg, v[i].name, len) == 0 && v[i].name[len] == '\0') break; if (v[i].name == NULL) { einfo (_("%F%P: invalid subsystem type %s\n"), optarg); return; } pe_subsystem = v[i].value; } set_pe_name ("__subsystem__", pe_subsystem); return; } static void set_pe_value (char *name) { char *end; set_pe_name (name, strtoul (optarg, &end, 0)); if (end == optarg) einfo (_("%F%P: invalid hex number for PE parameter '%s'\n"), optarg); optarg = end; } static void set_pe_stack_heap (char *resname, char *comname) { set_pe_value (resname); if (*optarg == ',') { optarg++; set_pe_value (comname); } else if (*optarg) einfo (_("%F%P: strange hex info for PE parameter '%s'\n"), optarg); } #define DEFAULT_BUILD_ID_STYLE "md5" static bool gld${EMULATION_NAME}_handle_option (int optc) { switch (optc) { default: return false; case OPTION_BASE_FILE: link_info.base_file = fopen (optarg, FOPEN_WB); if (link_info.base_file == NULL) einfo (_("%F%P: cannot open base file %s\n"), optarg); 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; case OPTION_USE_NUL_PREFIXED_IMPORT_TABLES: pe_use_nul_prefixed_import_tables = true; break; case OPTION_NO_LEADING_UNDERSCORE: pe_leading_underscore = 0; break; case OPTION_LEADING_UNDERSCORE: pe_leading_underscore = 1; break; case OPTION_INSERT_TIMESTAMP: insert_timestamp = true; break; case OPTION_NO_INSERT_TIMESTAMP: insert_timestamp = false; 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, EXCLUDESYMS); break; case OPTION_EXCLUDE_ALL_SYMBOLS: pe_dll_exclude_all_symbols = 1; break; case OPTION_EXCLUDE_LIBS: pe_dll_add_excludes (optarg, EXCLUDELIBS); break; case OPTION_EXCLUDE_MODULES_FOR_IMPLIB: pe_dll_add_excludes (optarg, EXCLUDEFORIMPLIB); 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_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; if (optarg && *optarg) { char *end; pe_auto_image_base = strtoul (optarg, &end, 0); /* XXX should check that we actually parsed something */ } 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; case OPTION_DLL_ENABLE_AUTO_IMPORT: link_info.pei386_auto_import = 1; break; case OPTION_DLL_DISABLE_AUTO_IMPORT: link_info.pei386_auto_import = 0; break; case OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC: link_info.pei386_runtime_pseudo_reloc = DEFAULT_PSEUDO_RELOC_VERSION; break; case OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V1: link_info.pei386_runtime_pseudo_reloc = 1; break; case OPTION_DLL_ENABLE_RUNTIME_PSEUDO_RELOC_V2: link_info.pei386_runtime_pseudo_reloc = 2; break; case OPTION_DLL_DISABLE_RUNTIME_PSEUDO_RELOC: link_info.pei386_runtime_pseudo_reloc = 0; break; case OPTION_ENABLE_EXTRA_PE_DEBUG: pe_dll_extra_pe_debug = 1; break; #endif case OPTION_LARGE_ADDRESS_AWARE: real_flags |= IMAGE_FILE_LARGE_ADDRESS_AWARE; break; case OPTION_DISABLE_LARGE_ADDRESS_AWARE: real_flags &= ~ IMAGE_FILE_LARGE_ADDRESS_AWARE; break; case OPTION_ENABLE_LONG_SECTION_NAMES: pe_use_coff_long_section_names = 1; break; case OPTION_DISABLE_LONG_SECTION_NAMES: pe_use_coff_long_section_names = 0; break; /* Get DLLCharacteristics bits */ case OPTION_DYNAMIC_BASE: pe_dll_characteristics |= IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE; /* fall through */ case OPTION_ENABLE_RELOC_SECTION: pe_dll_enable_reloc_section = 1; break; case OPTION_DISABLE_RELOC_SECTION: pe_dll_enable_reloc_section = 0; /* fall through */ case OPTION_DISABLE_DYNAMIC_BASE: pe_dll_characteristics &= ~ IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE; break; case OPTION_FORCE_INTEGRITY: pe_dll_characteristics |= IMAGE_DLL_CHARACTERISTICS_FORCE_INTEGRITY; break; case OPTION_DISABLE_FORCE_INTEGRITY: pe_dll_characteristics &= ~ IMAGE_DLL_CHARACTERISTICS_FORCE_INTEGRITY; break; case OPTION_NX_COMPAT: pe_dll_characteristics |= IMAGE_DLL_CHARACTERISTICS_NX_COMPAT; break; case OPTION_DISABLE_NX_COMPAT: pe_dll_characteristics &= ~ IMAGE_DLL_CHARACTERISTICS_NX_COMPAT; break; case OPTION_NO_ISOLATION: pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_NO_ISOLATION; break; case OPTION_DISABLE_NO_ISOLATION: pe_dll_characteristics &= ~ IMAGE_DLLCHARACTERISTICS_NO_ISOLATION; break; case OPTION_NO_SEH: pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_NO_SEH; break; case OPTION_DISABLE_NO_SEH: pe_dll_characteristics &= ~ IMAGE_DLLCHARACTERISTICS_NO_SEH; break; case OPTION_NO_BIND: pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_NO_BIND; break; case OPTION_DISABLE_NO_BIND: pe_dll_characteristics &= ~ IMAGE_DLLCHARACTERISTICS_NO_BIND; break; case OPTION_WDM_DRIVER: pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_WDM_DRIVER; break; case OPTION_DISABLE_WDM_DRIVER: pe_dll_characteristics &= ~ IMAGE_DLLCHARACTERISTICS_WDM_DRIVER; break; case OPTION_TERMINAL_SERVER_AWARE: pe_dll_characteristics |= IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE; break; case OPTION_DISABLE_TERMINAL_SERVER_AWARE: pe_dll_characteristics &= ~ IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE; break; case OPTION_BUILD_ID: free ((char *) emit_build_id); emit_build_id = NULL; if (optarg == NULL) optarg = DEFAULT_BUILD_ID_STYLE; if (strcmp (optarg, "none")) emit_build_id = xstrdup (optarg); break; #ifdef PDB_H case OPTION_PDB: pdb = 1; if (optarg && optarg[0]) pdb_name = xstrdup (optarg); break; #endif } /* Set DLLCharacteristics bits */ set_pe_name ("__dll_characteristics__", pe_dll_characteristics); return true; } #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 pe_auto_image_base + ((hash << 16) & 0x0FFC0000); } #endif /* Assign values to the special symbols before the linker script is read. */ static void gld${EMULATION_NAME}_set_symbols (void) { /* Run through and invent symbols for all the names and insert the defaults. */ int j; is_underscoring (); if (!init[IMAGEBASEOFF].inited) { if (bfd_link_relocatable (&link_info)) init[IMAGEBASEOFF].value = 0; else if (init[DLLOFF].value || bfd_link_dll (&link_info)) { #ifdef DLL_SUPPORT init[IMAGEBASEOFF].value = (pe_enable_auto_image_base ? compute_dll_image_base (output_filename) : NT_DLL_IMAGE_BASE); #else init[IMAGEBASEOFF].value = NT_DLL_IMAGE_BASE; #endif } else init[IMAGEBASEOFF].value = NT_EXE_IMAGE_BASE; init[MSIMAGEBASEOFF].value = init[IMAGEBASEOFF].value; } /* Don't do any symbol assignments if this is a relocatable link. */ if (bfd_link_relocatable (&link_info)) return; /* Glue the assignments into the abs section. */ push_stat_ptr (&abs_output_section->children); for (j = 0; init[j].ptr; j++) { long val = init[j].value; lang_assignment_statement_type *rv; rv = lang_add_assignment (exp_assign (GET_INIT_SYMBOL_NAME (j), exp_intop (val), false)); if (init[j].size == sizeof (short)) *(short *) init[j].ptr = val; else if (init[j].size == sizeof (int)) *(int *) init[j].ptr = val; else if (init[j].size == sizeof (long)) *(long *) init[j].ptr = val; /* This might be a long long or other special type. */ else if (init[j].size == sizeof (bfd_vma)) *(bfd_vma *) init[j].ptr = val; else abort (); if (j == IMAGEBASEOFF) image_base_statement = rv; } /* Restore the pointer. */ pop_stat_ptr (); if (pe.FileAlignment > pe.SectionAlignment) { einfo (_("%P: warning, file alignment > section alignment\n")); } } /* This is called after the linker script and the command line options have been read. */ static void gld${EMULATION_NAME}_after_parse (void) { /* PR ld/6744: Warn the user if they have used an ELF-only option hoping it will work on PE. */ if (link_info.export_dynamic) einfo (_("%P: warning: --export-dynamic is not supported for PE " "targets, did you mean --export-all-symbols?\n")); #ifdef PDB_H if (pdb && emit_build_id == NULL) emit_build_id = xstrdup (DEFAULT_BUILD_ID_STYLE); #endif set_entry_point (); after_parse_default (); } #ifdef DLL_SUPPORT static struct bfd_link_hash_entry *pe_undef_found_sym; static bool pe_undef_cdecl_match (struct bfd_link_hash_entry *h, void *inf) { int sl; char *string = inf; const char *hs = h->root.string; sl = strlen (string); if (h->type == bfd_link_hash_defined && ((*hs == '@' && *string == '_' && strncmp (hs + 1, string + 1, sl - 1) == 0) || strncmp (hs, string, sl) == 0) && h->root.string[sl] == '@') { pe_undef_found_sym = h; return false; } return true; } /* Change UNDEF to a defined symbol, taking data from SYM. */ static void change_undef (struct bfd_link_hash_entry * undef, struct bfd_link_hash_entry * sym) { static bool gave_warning_message = false; 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 (_("%P: warning: resolving %s by linking to %s\n"), undef->root.string, sym->root.string); if (! gave_warning_message) { einfo (_("Use --enable-stdcall-fixup to disable these warnings\n")); einfo (_("Use --disable-stdcall-fixup to disable these fixups\n")); gave_warning_message = true; } } /* PR 19803: Make sure that the linked symbol is not garbage collected. */ lang_add_gc_name (sym->root.string); } static void pe_fixup_stdcalls (void) { struct bfd_link_hash_entry *undef, *sym; if (pe_dll_extra_pe_debug) printf ("%s\n", __func__); for (undef = link_info.hash->undefs; undef; undef=undef->u.undef.next) if (undef->type == bfd_link_hash_undefined) { const char * name = undef->root.string; char * at; int lead_at = (*name == '@'); if (lead_at) at = strchr (name + 1, '@'); else at = strchr (name, '@'); if (at || lead_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 (name); if (lead_at) *cname = '_'; if (at) * strchr (cname, '@') = 0; sym = bfd_link_hash_lookup (link_info.hash, cname, false, false, true); if (sym && sym->type == bfd_link_hash_defined) change_undef (undef, sym); } else { /* The symbol is a cdecl symbol, so we look for stdcall symbols - which means scanning the whole symbol table. */ pe_undef_found_sym = NULL; bfd_link_hash_traverse (link_info.hash, pe_undef_cdecl_match, (char *) name); if (pe_undef_found_sym) change_undef (undef, pe_undef_found_sym); } } } static void make_import_fixup (arelent *rel, asection *s, char *name, const char *symname) { struct bfd_symbol *sym = *rel->sym_ptr_ptr; char addend[4]; bfd_vma _addend; if (pe_dll_extra_pe_debug) printf ("arelent: %s@%#lx: add=%li\n", sym->name, (unsigned long) rel->address, (long) rel->addend); if (! bfd_get_section_contents (s->owner, s, addend, rel->address, sizeof (addend))) einfo (_("%P: %C: cannot get section contents - auto-import exception\n"), s->owner, s, rel->address); _addend = bfd_get_32 (s->owner, addend); pe_create_import_fixup (rel, s, _addend, name, symname); } static bool pr_sym (struct bfd_hash_entry *h, void *inf ATTRIBUTE_UNUSED) { printf ("+%s\n", h->string); return true; } #endif /* DLL_SUPPORT */ static void debug_section_p (bfd *abfd ATTRIBUTE_UNUSED, asection *sect, void *obj) { int *found = (int *) obj; if (strncmp (".debug_", sect->name, sizeof (".debug_") - 1) == 0) *found = 1; } static bool pecoff_checksum_contents (bfd *abfd, void (*process) (const void *, size_t, void *), void *arg) { file_ptr filepos = (file_ptr) 0; while (1) { unsigned char b; int status; if (bfd_seek (abfd, filepos, SEEK_SET) != 0) return 0; status = bfd_bread (&b, (bfd_size_type) 1, abfd); if (status < 1) { break; } (*process) (&b, 1, arg); filepos += 1; } return true; } static bool write_build_id (bfd *abfd) { struct pe_tdata *td = pe_data (abfd); asection *asec; struct bfd_link_order *link_order = NULL; unsigned char *contents; bfd_size_type build_id_size; unsigned char *build_id; const char *pdb_base_name = NULL; /* Find the section the .buildid output section has been merged info. */ for (asec = abfd->sections; asec != NULL; asec = asec->next) { struct bfd_link_order *l = NULL; for (l = asec->map_head.link_order; l != NULL; l = l->next) { if (l->type == bfd_indirect_link_order) { if (l->u.indirect.section == td->build_id.sec) { link_order = l; break; } } } if (link_order) break; } if (!link_order) { einfo (_("%P: warning: .buildid section discarded," " --build-id ignored\n")); return true; } if (td->build_id.sec->contents == NULL) td->build_id.sec->contents = xmalloc (td->build_id.sec->size); contents = td->build_id.sec->contents; build_id_size = compute_build_id_size (td->build_id.style); build_id = xmalloc (build_id_size); generate_build_id (abfd, td->build_id.style, pecoff_checksum_contents, build_id, build_id_size); bfd_vma ib = td->pe_opthdr.ImageBase; #ifdef PDB_H if (pdb_name) pdb_base_name = lbasename (pdb_name); #endif /* Construct a debug directory entry which points to an immediately following CodeView record. */ struct internal_IMAGE_DEBUG_DIRECTORY idd; idd.Characteristics = 0; idd.TimeDateStamp = 0; idd.MajorVersion = 0; idd.MinorVersion = 0; idd.Type = PE_IMAGE_DEBUG_TYPE_CODEVIEW; idd.SizeOfData = (sizeof (CV_INFO_PDB70) #ifdef PDB_H + (pdb_base_name ? strlen (pdb_base_name) : 0) #endif + 1); idd.AddressOfRawData = asec->vma - ib + link_order->offset + sizeof (struct external_IMAGE_DEBUG_DIRECTORY); idd.PointerToRawData = asec->filepos + link_order->offset + sizeof (struct external_IMAGE_DEBUG_DIRECTORY); struct external_IMAGE_DEBUG_DIRECTORY *ext = (struct external_IMAGE_DEBUG_DIRECTORY *)contents; _bfd_XXi_swap_debugdir_out (abfd, &idd, ext); /* Write the debug directory entry. */ if (bfd_seek (abfd, asec->filepos + link_order->offset, SEEK_SET) != 0) return 0; if (bfd_bwrite (contents, sizeof (*ext), abfd) != sizeof (*ext)) return 0; #ifdef PDB_H if (pdb) { if (!create_pdb_file (abfd, pdb_name, build_id)) return 0; } #endif /* Construct the CodeView record. */ CODEVIEW_INFO cvinfo; cvinfo.CVSignature = CVINFO_PDB70_CVSIGNATURE; cvinfo.Age = 1; /* Zero pad or truncate the generated build_id to fit in the CodeView record. */ memset (&(cvinfo.Signature), 0, CV_INFO_SIGNATURE_LENGTH); memcpy (&(cvinfo.Signature), build_id, (build_id_size > CV_INFO_SIGNATURE_LENGTH ? CV_INFO_SIGNATURE_LENGTH : build_id_size)); free (build_id); /* Write the codeview record. */ if (_bfd_XXi_write_codeview_record (abfd, idd.PointerToRawData, &cvinfo, pdb_base_name) == 0) return 0; /* Record the location of the debug directory in the data directory. */ td->pe_opthdr.DataDirectory[PE_DEBUG_DATA].VirtualAddress = asec->vma - ib + link_order->offset; td->pe_opthdr.DataDirectory[PE_DEBUG_DATA].Size = sizeof (struct external_IMAGE_DEBUG_DIRECTORY); return true; } /* Make .buildid section, and set up coff_tdata->build_id. */ static bool setup_build_id (bfd *ibfd) { asection *s; flagword flags; if (!validate_build_id_style (emit_build_id)) { einfo (_("%P: warning: unrecognized --build-id style ignored\n")); return false; } flags = (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA); s = bfd_make_section_anyway_with_flags (ibfd, ".buildid", flags); if (s != NULL) { struct pe_tdata *td = pe_data (link_info.output_bfd); td->build_id.after_write_object_contents = &write_build_id; td->build_id.style = emit_build_id; td->build_id.sec = s; /* Section is a fixed size: One IMAGE_DEBUG_DIRECTORY entry, of type IMAGE_DEBUG_TYPE_CODEVIEW, pointing at a CV_INFO_PDB70 record containing the build-id, followed by PdbFileName if relevant. */ s->size = (sizeof (struct external_IMAGE_DEBUG_DIRECTORY) + sizeof (CV_INFO_PDB70) + 1); #ifdef PDB_H if (pdb_name) s->size += strlen (lbasename (pdb_name)); #endif return true; } einfo (_("%P: warning: cannot create .buildid section," " --build-id ignored\n")); return false; } static void gld${EMULATION_NAME}_after_open (void) { after_open_default (); #ifdef DLL_SUPPORT if (pe_dll_extra_pe_debug) { bfd *a; struct bfd_link_hash_entry *sym; printf ("%s()\n", __func__); for (sym = link_info.hash->undefs; sym; sym=sym->u.undef.next) printf ("-%s\n", sym->root.string); bfd_hash_traverse (&link_info.hash->table, pr_sym, NULL); for (a = link_info.input_bfds; a; a = a->link.next) printf ("*%s\n", bfd_get_filename (a)); } #endif #ifdef PDB_H if (pdb && !pdb_name) { const char *base = lbasename (bfd_get_filename (link_info.output_bfd)); size_t len = strlen (base); static const char suffix[] = ".pdb"; while (len > 0 && base[len] != '.') { len--; } if (len == 0) len = strlen (base); pdb_name = xmalloc (len + sizeof (suffix)); memcpy (pdb_name, base, len); memcpy (pdb_name + len, suffix, sizeof (suffix)); } #endif if (emit_build_id != NULL) { bfd *abfd; /* Find a COFF input. */ for (abfd = link_info.input_bfds; abfd != (bfd *) NULL; abfd = abfd->link.next) if (bfd_get_flavour (abfd) == bfd_target_coff_flavour) break; /* If there are no COFF input files do not try to add a build-id section. */ if (abfd == NULL || !setup_build_id (abfd)) { free ((char *) emit_build_id); emit_build_id = NULL; } } /* 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 (bfd_get_flavour (link_info.output_bfd) != bfd_target_coff_flavour || coff_data (link_info.output_bfd) == NULL || !obj_pe (link_info.output_bfd)) einfo (_("%F%P: cannot perform PE operations on non PE output file '%pB'\n"), link_info.output_bfd); pe_data (link_info.output_bfd)->pe_opthdr = pe; pe_data (link_info.output_bfd)->dll = init[DLLOFF].value; pe_data (link_info.output_bfd)->real_flags |= real_flags; if (insert_timestamp) pe_data (link_info.output_bfd)->timestamp = -1; else pe_data (link_info.output_bfd)->timestamp = 0; /* At this point we must decide whether to use long section names in the output or not. If the user hasn't explicitly specified on the command line, we leave it to the default for the format (object files yes, image files no), except if there is debug information present; GDB relies on the long section names to find it, so enable it in that case. */ if (pe_use_coff_long_section_names < 0 && link_info.strip == strip_none) { if (bfd_link_relocatable (&link_info)) pe_use_coff_long_section_names = 1; else { /* Iterate over all sections of all input BFDs, checking for any that begin 'debug_' and are long names. */ LANG_FOR_EACH_INPUT_STATEMENT (is) { int found_debug = 0; bfd_map_over_sections (is->the_bfd, debug_section_p, &found_debug); if (found_debug) { pe_use_coff_long_section_names = 1; break; } } } } pe_output_file_set_long_section_names (link_info.output_bfd); #ifdef DLL_SUPPORT pe_process_import_defs (link_info.output_bfd, &link_info); if (link_info.pei386_auto_import) /* -1=warn or 1=enable */ pe_find_data_imports (U ("_head_"), make_import_fixup); /* The implementation of the feature is rather dumb and would cause the compilation time to go through the roof if there are many undefined symbols in the link, so it needs to be run after auto-import. */ if (pe_enable_stdcall_fixup) /* -1=warn or 1=enable */ pe_fixup_stdcalls (); #if defined (TARGET_IS_i386pe) \ || defined (TARGET_IS_armpe) \ || defined (TARGET_IS_arm_wince_pe) if (!bfd_link_relocatable (&link_info)) pe_dll_build_sections (link_info.output_bfd, &link_info); #else if (bfd_link_pic (&link_info)) pe_dll_build_sections (link_info.output_bfd, &link_info); else pe_exe_build_sections (link_info.output_bfd, &link_info); #endif #endif /* DLL_SUPPORT */ #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_wince_pe) if (strstr (bfd_get_target (link_info.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%P: error: cannot change output format " "whilst linking %s binaries\n"), "ARM"); return; } { /* Find a BFD that can hold the interworking stubs. */ LANG_FOR_EACH_INPUT_STATEMENT (is) { if (bfd_arm_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 (startswith (sec->name, ".idata\$")) 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 relsize; asymbol **symbols; arelent **relocs; int nrelocs; relsize = bfd_get_reloc_upper_bound (is->the_bfd, sec); if (relsize < 1) break; if (!bfd_generic_link_read_symbols (is->the_bfd)) { einfo (_("%F%P: %pB: could not read symbols: %E\n"), is->the_bfd); return; } symbols = bfd_get_outsymbols (is->the_bfd); relocs = 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\n")); return; } for (i = 0; i < nrelocs; i++) { struct bfd_symbol *s; struct bfd_link_hash_entry * blhe; bfd *other_bfd; const char *other_bfd_filename; 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 (other_bfd->my_archive == is->the_bfd->my_archive) continue; other_bfd_filename = (other_bfd->my_archive ? bfd_get_filename (other_bfd->my_archive) : bfd_get_filename (other_bfd)); if (filename_cmp (bfd_get_filename (is->the_bfd->my_archive), other_bfd_filename) == 0) continue; /* Sort this implib to match the other one. */ lang_input_statement_type *arch_is = bfd_usrdata (is->the_bfd->my_archive); arch_is->sort_key = other_bfd_filename; break; } free (relocs); /* Note - we do not free the symbols, they are now cached in the BFD. */ } } } } } { /* 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) { char *pnt; /* Microsoft import libraries may contain archive members for one or more DLLs, together with static object files. Inspect all members that are named *.dll - check whether they contain .idata sections. Do the renaming of all archive members that seem to be Microsoft style import objects. */ pnt = strrchr (bfd_get_filename (is->the_bfd), '.'); if (pnt != NULL && (fileext_cmp (pnt + 1, "dll") == 0)) { int idata2 = 0, reloc_count = 0, idata = 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; if (strncmp (sec->name, ".idata\$", 6) == 0) idata = 1; reloc_count += sec->reloc_count; } /* An archive member named .dll, but not having any .idata sections - apparently not a Microsoft import object after all: Skip renaming it. */ if (!idata) continue; if (idata2) /* .idata2 is the TOC */ seq = 'a'; else if (reloc_count > 0) /* thunks */ seq = 'b'; else /* sentinel */ seq = 'c'; new_name = xmalloc (strlen (bfd_get_filename (is->the_bfd)) + 3); sprintf (new_name, "%s.%c", bfd_get_filename (is->the_bfd), seq); is->sort_key = new_name; } } } } { /* The following chunk of code tries to identify jump stubs in import libraries which are dead code and eliminates them from the final link. For each exported symbol , there is a object file in the import library with a .text section and several .idata\$* sections. The .text section contains the symbol definition for which is a jump stub of the form jmp *__imp_. The .idata\$5 contains the symbol definition for __imp_ which is the address of the slot for in the import address table. When a symbol is imported explicitly using __declspec(dllimport) declaration, the compiler generates a reference to __imp_ which directly resolves to the symbol in .idata\$5, in which case the jump stub code is not needed. The following code tries to identify jump stub sections in import libraries which are not referred to by anyone and marks them for exclusion from the final link. */ LANG_FOR_EACH_INPUT_STATEMENT (is) { if (is->the_bfd->my_archive) { int is_imp = 0; asection *sec, *stub_sec = NULL; /* See if this is an import library thunk. */ for (sec = is->the_bfd->sections; sec; sec = sec->next) { if (strncmp (sec->name, ".idata\$", 7) == 0) is_imp = 1; /* The section containing the jmp stub has code and has a reloc. */ if ((sec->flags & SEC_CODE) && sec->reloc_count) stub_sec = sec; } if (is_imp && stub_sec) { asymbol **symbols; long nsyms, src_count; struct bfd_link_hash_entry * blhe; if (!bfd_generic_link_read_symbols (is->the_bfd)) { einfo (_("%F%P: %pB: could not read symbols: %E\n"), is->the_bfd); return; } symbols = bfd_get_outsymbols (is->the_bfd); nsyms = bfd_get_symcount (is->the_bfd); for (src_count = 0; src_count < nsyms; src_count++) { if (symbols[src_count]->section->id == stub_sec->id) { /* This symbol belongs to the section containing the stub. */ blhe = bfd_link_hash_lookup (link_info.hash, symbols[src_count]->name, false, false, true); /* If the symbol in the stub section has no other undefined references, exclude the stub section from the final link. */ if (blhe != NULL && blhe->type == bfd_link_hash_defined && blhe->u.undef.next == NULL && blhe != link_info.hash->undefs_tail) stub_sec->flags |= SEC_EXCLUDE; } } } } } } } static void gld${EMULATION_NAME}_before_allocation (void) { #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_wince_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_process_before_allocation (is->the_bfd, & link_info, support_old_code)) { /* xgettext:c-format */ einfo (_("%P: errors encountered processing file %s for interworking\n"), is->filename); } } } /* We have seen it all. Allocate it, and carry on. */ bfd_arm_allocate_interworking_sections (& link_info); #endif /* TARGET_IS_armpe || TARGET_IS_arm_wince_pe */ before_allocation_default (); } #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 (GET_INIT_SYMBOL_NAME (i), option) == 0) return init[i].inited; return 0; } #endif /* DLL_SUPPORT */ static bool gld${EMULATION_NAME}_unrecognized_file (lang_input_statement_type *entry ATTRIBUTE_UNUSED) { #ifdef DLL_SUPPORT const char *ext = strrchr (entry->filename, '.'); if (ext != NULL && fileext_cmp (ext + 1, "def") == 0) { pe_def_file = def_file_parse (entry->filename, pe_def_file); if (pe_def_file) { int i, buflen=0, len; char *buf; for (i = 0; i < pe_def_file->num_exports; i++) { len = strlen (pe_def_file->exports[i].internal_name); if (buflen < len + 2) buflen = len + 2; } buf = xmalloc (buflen); for (i = 0; i < pe_def_file->num_exports; i++) { struct bfd_link_hash_entry *h; sprintf (buf, "%s%s", U (""), pe_def_file->exports[i].internal_name); h = bfd_link_hash_lookup (link_info.hash, buf, true, true, true); if (h == (struct bfd_link_hash_entry *) NULL) einfo (_("%F%P: bfd_link_hash_lookup failed: %E\n")); if (h->type == bfd_link_hash_new) { h->type = bfd_link_hash_undefined; h->u.undef.abfd = NULL; bfd_link_add_undef (link_info.hash, h); } } free (buf); /* def_file_print (stdout, pe_def_file); */ if (pe_def_file->is_dll == 1) link_info.type = type_dll; if (pe_def_file->base_address != (bfd_vma)(-1)) { pe.ImageBase = pe_data (link_info.output_bfd)->pe_opthdr.ImageBase = init[IMAGEBASEOFF].value = pe_def_file->base_address; init[IMAGEBASEOFF].inited = 1; if (image_base_statement) image_base_statement->exp = exp_assign ("__image_base__", exp_intop (pe.ImageBase), false); } if (pe_def_file->stack_reserve != -1 && ! saw_option ("__size_of_stack_reserve__")) { pe.SizeOfStackReserve = pe_def_file->stack_reserve; if (pe_def_file->stack_commit != -1) pe.SizeOfStackCommit = pe_def_file->stack_commit; } if (pe_def_file->heap_reserve != -1 && ! saw_option ("__size_of_heap_reserve__")) { pe.SizeOfHeapReserve = pe_def_file->heap_reserve; if (pe_def_file->heap_commit != -1) pe.SizeOfHeapCommit = pe_def_file->heap_commit; } return true; } } #endif return false; } static bool gld${EMULATION_NAME}_recognized_file (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_armpe pe_dll_id_target ("pei-arm-little"); #endif #ifdef TARGET_IS_arm_wince_pe pe_dll_id_target ("pei-arm-wince-little"); #endif if (pe_bfd_is_dll (entry->the_bfd)) return pe_implied_import_dll (entry->filename); #endif return false; } static void gld${EMULATION_NAME}_finish (void) { #if defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_wince_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_section_vma (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. */ sprintf (buffer, "0x%" PRIx64, (uint64_t) val); if (entry_symbol.name != NULL && entry_from_cmdline) einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), thumb_entry_symbol, entry_symbol.name); entry_symbol.name = buffer; } else einfo (_("%P: warning: cannot find thumb start symbol %s\n"), thumb_entry_symbol); } #endif /* defined(TARGET_IS_armpe) || defined(TARGET_IS_arm_wince_pe) */ finish_default (); #ifdef DLL_SUPPORT if (bfd_link_pic (&link_info) #if !defined(TARGET_IS_shpe) || pe_dll_enable_reloc_section || (!bfd_link_relocatable (&link_info) && pe_def_file->num_exports != 0) #endif ) { pe_dll_fill_sections (link_info.output_bfd, &link_info); if (command_line.out_implib_filename && (pe_def_file->num_exports != 0 || bfd_link_pic (&link_info))) pe_dll_generate_implib (pe_def_file, command_line.out_implib_filename, &link_info); } #if defined(TARGET_IS_shpe) /* ARM doesn't need relocs. */ else { pe_exe_fill_sections (link_info.output_bfd, &link_info); } #endif if (pe_out_def_filename) pe_dll_generate_def_file (pe_out_def_filename); #endif /* DLL_SUPPORT */ /* I don't know where .idata gets set as code, but it shouldn't be. */ { asection *asec = bfd_get_section_by_name (link_info.output_bfd, ".idata"); if (asec) { asec->flags &= ~SEC_CODE; asec->flags |= SEC_DATA; } } } /* 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. */ static lang_output_section_statement_type * gld${EMULATION_NAME}_place_orphan (asection *s, const char *secname, int constraint) { const char *orig_secname = secname; char *dollar = NULL; lang_output_section_statement_type *os; lang_statement_list_type add_child; lang_output_section_statement_type *match_by_name = NULL; lang_statement_union_type **pl; /* Look through the script to see where to place this section. */ if (!bfd_link_relocatable (&link_info) && (dollar = strchr (secname, '\$')) != NULL) { size_t len = dollar - secname; char *newname = xmalloc (len + 1); memcpy (newname, secname, len); newname[len] = '\0'; secname = newname; } lang_list_init (&add_child); os = NULL; if (constraint == 0) for (os = lang_output_section_find (secname); os != NULL; os = next_matching_output_section_statement (os, 0)) { /* If we don't match an existing output section, tell lang_insert_orphan to create a new output section. */ constraint = SPECIAL; if (os->bfd_section != NULL && (os->bfd_section->flags == 0 || ((s->flags ^ os->bfd_section->flags) & (SEC_LOAD | SEC_ALLOC)) == 0)) { /* We already have an output section statement with this name, and its bfd section has compatible flags. If the section already exists but does not have any flags set, then it has been created by the linker, probably as a result of a --section-start command line switch. */ lang_add_section (&add_child, s, NULL, NULL, os); break; } /* Save unused output sections in case we can match them against orphans later. */ if (os->bfd_section == NULL) match_by_name = os; } /* If we didn't match an active output section, see if we matched an unused one and use that. */ if (os == NULL && match_by_name) { lang_add_section (&match_by_name->children, s, NULL, NULL, match_by_name); return match_by_name; } if (os == NULL) { static struct orphan_save hold[] = { { ".text", SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE, 0, 0, 0, 0 }, { ".idata", SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA, 0, 0, 0, 0 }, { ".rdata", SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA, 0, 0, 0, 0 }, { ".data", SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA, 0, 0, 0, 0 }, { ".bss", SEC_ALLOC, 0, 0, 0, 0 } }; enum orphan_save_index { orphan_text = 0, orphan_idata, orphan_rodata, orphan_data, orphan_bss }; static int orphan_init_done = 0; struct orphan_save *place; lang_output_section_statement_type *after; etree_type *address; flagword flags; asection *nexts; if (!orphan_init_done) { struct orphan_save *ho; for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho) if (ho->name != NULL) { ho->os = lang_output_section_find (ho->name); if (ho->os != NULL && ho->os->flags == 0) ho->os->flags = ho->flags; } orphan_init_done = 1; } flags = s->flags; if (!bfd_link_relocatable (&link_info)) { nexts = s; while ((nexts = bfd_get_next_section_by_name (nexts->owner, nexts))) if (nexts->output_section == NULL && (nexts->flags & SEC_EXCLUDE) == 0 && ((nexts->flags ^ flags) & (SEC_LOAD | SEC_ALLOC)) == 0 && (nexts->owner->flags & DYNAMIC) == 0 && !bfd_input_just_syms (nexts->owner)) flags = (((flags ^ SEC_READONLY) | (nexts->flags ^ SEC_READONLY)) ^ SEC_READONLY); } /* Try to put the new output section in a reasonable place based on the section name and section flags. */ place = NULL; if ((flags & SEC_ALLOC) == 0) ; else if ((flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0) place = &hold[orphan_bss]; else if ((flags & SEC_READONLY) == 0) place = &hold[orphan_data]; else if ((flags & SEC_CODE) == 0) { place = (!strncmp (secname, ".idata\$", 7) ? &hold[orphan_idata] : &hold[orphan_rodata]); } else place = &hold[orphan_text]; after = NULL; if (place != NULL) { if (place->os == NULL) place->os = lang_output_section_find (place->name); after = place->os; if (after == NULL) after = lang_output_section_find_by_flags (s, flags, &place->os, NULL); if (after == NULL) /* *ABS* is always the first output section statement. */ after = (void *) lang_os_list.head; } /* All sections in an executable must be aligned to a page boundary. In a relocatable link, just preserve the incoming alignment; the address is discarded by lang_insert_orphan in that case, anyway. */ address = exp_unop (ALIGN_K, exp_nameop (NAME, "__section_alignment__")); os = lang_insert_orphan (s, secname, constraint, after, place, address, &add_child); if (bfd_link_relocatable (&link_info)) { os->section_alignment = exp_intop (1U << s->alignment_power); os->bfd_section->alignment_power = s->alignment_power; } } /* If the section name has a '\$', sort it with the other '\$' sections. */ for (pl = &os->children.head; *pl != NULL; pl = &(*pl)->header.next) { lang_input_section_type *ls; const char *lname; if ((*pl)->header.type != lang_input_section_enum) continue; ls = &(*pl)->input_section; lname = bfd_section_name (ls->section); if (strchr (lname, '\$') != NULL && (dollar == NULL || strcmp (orig_secname, lname) < 0)) break; } if (add_child.head != NULL) { *add_child.tail = *pl; *pl = add_child.head; } return os; } static bool gld${EMULATION_NAME}_open_dynamic_archive (const char *arch ATTRIBUTE_UNUSED, search_dirs_type *search, lang_input_statement_type *entry) { static const struct { const char * format; bool use_prefix; } libname_fmt [] = { /* Preferred explicit import library for dll's. */ { "lib%s.dll.a", false }, /* Alternate explicit import library for dll's. */ { "%s.dll.a", false }, /* "libfoo.a" could be either an import lib or a static lib. For backwards compatibility, libfoo.a needs to precede libfoo.dll and foo.dll in the search. */ { "lib%s.a", false }, /* The 'native' spelling of an import lib name is "foo.lib". */ { "%s.lib", false }, /* PR 22948 - Check for an import library. */ { "lib%s.lib", false }, #ifdef DLL_SUPPORT /* Try "foo.dll" (preferred dll name, if specified). */ { "%s%s.dll", true }, #endif /* Try "libfoo.dll" (default preferred dll name). */ { "lib%s.dll", false }, /* Finally try 'native' dll name "foo.dll". */ { "%s.dll", false }, /* Note: If adding more formats to this table, make sure to check to see if their length is longer than libname_fmt[0].format, and if so, update the call to xmalloc() below. */ { NULL, false } }; static unsigned int format_max_len = 0; const char * filename; char * full_string; char * base_string; unsigned int i; if (! entry->flags.maybe_archive || entry->flags.full_name_provided) return false; filename = entry->filename; if (format_max_len == 0) /* We need to allow space in the memory that we are going to allocate for the characters in the format string. Since the format array is static we only need to calculate this information once. In theory this value could also be computed statically, but this introduces the possibility for a discrepancy and hence a possible memory corruption. The lengths we compute here will be too long because they will include any formating characters (%s) in the strings, but this will not matter. */ for (i = 0; libname_fmt[i].format; i++) if (format_max_len < strlen (libname_fmt[i].format)) format_max_len = strlen (libname_fmt[i].format); full_string = xmalloc (strlen (search->name) + strlen (filename) + format_max_len #ifdef DLL_SUPPORT + (pe_dll_search_prefix ? strlen (pe_dll_search_prefix) : 0) #endif /* Allow for the terminating NUL and for the path separator character that is inserted between search->name and the start of the format string. */ + 2); sprintf (full_string, "%s/", search->name); base_string = full_string + strlen (full_string); for (i = 0; libname_fmt[i].format; i++) { #ifdef DLL_SUPPORT if (libname_fmt[i].use_prefix) { if (!pe_dll_search_prefix) continue; sprintf (base_string, libname_fmt[i].format, pe_dll_search_prefix, filename); } else #endif sprintf (base_string, libname_fmt[i].format, filename); if (ldfile_try_open_bfd (full_string, entry)) break; } if (!libname_fmt[i].format) { free (full_string); return false; } entry->filename = full_string; return true; } static int gld${EMULATION_NAME}_find_potential_libraries (char *name, lang_input_statement_type *entry) { return ldfile_open_file_search (name, entry, "", ".lib"); } static char * gld${EMULATION_NAME}_get_script (int *isfile) EOF if test x"$COMPILE_IN" = xyes then # Scripts compiled in. # sed commands to quote an ld script as a C string. sc="-f stringify.sed" fragment <> e${EMULATION_NAME}.c echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${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${EMULATION_NAME}.c if test -n "$GENERATE_AUTO_IMPORT_SCRIPT" ; then echo ' ; else if (link_info.pei386_auto_import == 1 && (MERGE_RDATA_V2 || link_info.pei386_runtime_pseudo_reloc != 2)) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xa >> e${EMULATION_NAME}.c fi echo ' ; else return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c echo '; }' >> e${EMULATION_NAME}.c else # Scripts read from the filesystem. fragment <