X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=ld%2Femultempl%2Farmelf.em;h=29e9902cb8c9251107fb2c3f73e10b39f94a3d7d;hb=83b94be54133a44825c4c33975d8fb72e286ed16;hp=03f7acad2546a8d006241bad2e84610ae60264f3;hpb=31ce062864f98cd5a1df7cda7e975dbccc13bf26;p=deliverable%2Fbinutils-gdb.git diff --git a/ld/emultempl/armelf.em b/ld/emultempl/armelf.em index 03f7acad25..29e9902cb8 100644 --- a/ld/emultempl/armelf.em +++ b/ld/emultempl/armelf.em @@ -1,1153 +1,370 @@ # This shell script emits a C file. -*- C -*- -# It does some substitutions. -ELFSIZE=32 -cat >e${EMULATION_NAME}.c <is_archive) - return false; - - filename = entry->filename; - - string = (char *) xmalloc (strlen (search->name) - + strlen (filename) - + strlen (arch) - + sizeof "/lib.so"); - - sprintf (string, "%s/lib%s%s.so", search->name, filename, arch); - - if (! ldfile_try_open_bfd (string, entry)) + if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL) { - free (string); - return false; + /* 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; } - entry->filename = string; - - /* We have found a dynamic object to include in the link. The ELF - backend linker will create a DT_NEEDED entry in the .dynamic - section naming this file. If this file includes a DT_SONAME - entry, it will be used. Otherwise, the ELF linker will just use - the name of the file. For an archive found by searching, like - this one, the DT_NEEDED entry should consist of just the name of - the file, without the path information used to find it. Note - that we only need to do this if we have a dynamic object; an - archive will never be referenced by a DT_NEEDED entry. - - FIXME: This approach--using bfd_elf_set_dt_needed_name--is not - very pretty. I haven't been able to think of anything that is - pretty, though. */ - if (bfd_check_format (entry->the_bfd, bfd_object) - && (entry->the_bfd->flags & DYNAMIC) != 0) - { - char *needed_name; - - ASSERT (entry->is_archive && entry->search_dirs_flag); - needed_name = (char *) xmalloc (strlen (filename) - + strlen (arch) - + sizeof "lib.so"); - sprintf (needed_name, "lib%s%s.so", filename, arch); - bfd_elf_set_dt_needed_name (entry->the_bfd, needed_name); - } + { + LANG_FOR_EACH_INPUT_STATEMENT (is) + { + bfd_elf32_arm_add_glue_sections_to_bfd (is->the_bfd, & link_info); + } + } - return true; + /* Call the standard elf routine. */ + gld${EMULATION_NAME}_after_open (); } -EOF -if [ "x${host}" = "x${target}" ] ; then - if [ "x${DEFAULT_EMULATION}" = "x${EMULATION_NAME}" ] ; then -cat >>e${EMULATION_NAME}.c <header.type == lang_input_section_enum) { - FILE *f; + asection *i = statement->input_section.section; - f = fopen ("/etc/ld.so.conf", FOPEN_RT); - if (f != NULL) + if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag + && (i->flags & SEC_EXCLUDE) == 0) { - char *b; - size_t len, alloc; - int c; + asection *output_section = i->output_section; - len = 0; - alloc = 100; - b = (char *) xmalloc (alloc); + ASSERT (output_section->owner == link_info.output_bfd); - while ((c = getc (f)) != EOF) + /* Don't attach the interworking stubs to a dynamic object, to + an empty section, etc. */ + if ((output_section->flags & SEC_HAS_CONTENTS) != 0 + && (i->flags & SEC_NEVER_LOAD) == 0 + && ! (i->owner->flags & DYNAMIC) + && ! i->owner->output_has_begun) { - if (len + 1 >= alloc) - { - alloc *= 2; - b = (char *) xrealloc (b, alloc); - } - if (c != ':' - && c != ' ' - && c != '\t' - && c != '\n' - && c != ',') - { - b[len] = c; - ++len; - } - else - { - if (len > 0 && b[len - 1] != ':') - { - b[len] = ':'; - ++len; - } - } + bfd_for_interwork = i->owner; + bfd_for_interwork->output_has_begun = TRUE; } - - if (len > 0 && b[len - 1] == ':') - --len; - - if (len > 0) - b[len] = '\0'; - else - { - free (b); - b = NULL; - } - - fclose (f); - - ld_so_conf = b; } - - initialized = true; } - - if (ld_so_conf == NULL) - return false; - - return gld${EMULATION_NAME}_search_needed (ld_so_conf, name, force); } -EOF - fi -fi -cat >>e${EMULATION_NAME}.c <next) - bfd_elf32_arm_get_bfd_for_interworking (is->the_bfd, & link_info); - } - - /* We only need to worry about this when doing a final link. */ - if (link_info.relocateable || link_info.shared) - return; - - /* Get the list of files which appear in DT_NEEDED entries in - dynamic objects included in the link (often there will be none). - For each such file, we want to track down the corresponding - library, and include the symbol table in the link. This is what - the runtime dynamic linker will do. Tracking the files down here - permits one dynamic object to include another without requiring - special action by the person doing the link. Note that the - needed list can actually grow while we are stepping through this - loop. */ - needed = bfd_elf_get_needed_list (output_bfd, &link_info); - for (l = needed; l != NULL; l = l->next) - { - struct bfd_link_needed_list *ll; - int force; - - /* If we've already seen this file, skip it. */ - for (ll = needed; ll != l; ll = ll->next) - if (strcmp (ll->name, l->name) == 0) - break; - if (ll != l) - continue; - - /* See if this file was included in the link explicitly. */ - global_needed = l; - global_found = false; - lang_for_each_input_file (gld${EMULATION_NAME}_check_needed); - if (global_found) - continue; - - /* We need to find this file and include the symbol table. We - want to search for the file in the same way that the dynamic - linker will search. That means that we want to use - rpath_link, rpath, then the environment variable - LD_LIBRARY_PATH (native only), then the linker script - LIB_SEARCH_DIRS. We do not search using the -L arguments. - - We search twice. The first time, we skip objects which may - introduce version mismatches. The second time, we force - their use. See gld${EMULATION_NAME}_vercheck comment. */ - for (force = 0; force < 2; force++) - { - const char *lib_path; - size_t len; - search_dirs_type *search; - - if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link, - l->name, force)) - break; - if (gld${EMULATION_NAME}_search_needed (command_line.rpath, - l->name, force)) - break; - if (command_line.rpath_link == NULL - && command_line.rpath == NULL) - { - lib_path = (const char *) getenv ("LD_RUN_PATH"); - if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, - force)) - break; - } -EOF -if [ "x${host}" = "x${target}" ] ; then - if [ "x${DEFAULT_EMULATION}" = "x${EMULATION_NAME}" ] ; then -cat >>e${EMULATION_NAME}.c <name, force)) - break; -EOF - fi -fi -cat >>e${EMULATION_NAME}.c <name); - for (search = search_head; search != NULL; search = search->next) - { - char *filename; - - if (search->cmdline) - continue; - filename = (char *) xmalloc (strlen (search->name) + len + 2); - sprintf (filename, "%s/%s", search->name, l->name); - if (gld${EMULATION_NAME}_try_needed (filename, force)) - break; - free (filename); - } - if (search != NULL) - break; -EOF -if [ "x${host}" = "x${target}" ] ; then - if [ "x${DEFAULT_EMULATION}" = "x${EMULATION_NAME}" ] ; then -cat >>e${EMULATION_NAME}.c <name, force)) - break; -EOF - fi -fi -cat >>e${EMULATION_NAME}.c <name, l->by); - } -} - -/* Search for a needed file in a path. */ - -static boolean -gld${EMULATION_NAME}_search_needed (path, name, force) - const char *path; - const char *name; - int force; +arm_elf_before_allocation (void) { - const char *s; - size_t len; + bfd *tem; - if (path == NULL || *path == '\0') - return false; - len = strlen (name); - while (1) + if (link_info.input_bfds != NULL) { - char *filename, *sset; - - s = strchr (path, ':'); - if (s == NULL) - s = path + strlen (path); - - filename = (char *) xmalloc (s - path + len + 2); - if (s == path) - sset = filename; - else - { - memcpy (filename, path, s - path); - filename[s - path] = '/'; - sset = filename + (s - path) + 1; - } - strcpy (sset, name); - - if (gld${EMULATION_NAME}_try_needed (filename, force)) - return true; - - free (filename); - - if (*s == '\0') - break; - path = s + 1; + /* The interworking bfd must be the last one in the link. */ + bfd_for_interwork = NULL; + for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) + tem->output_has_begun = FALSE; + + lang_for_each_statement (arm_elf_set_bfd_for_interworking); + for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) + tem->output_has_begun = FALSE; + + /* If bfd_for_interwork is NULL, then there are no loadable sections + with real contents to be linked, so we are not going to have to + create any interworking stubs, so it is OK not to call + bfd_elf32_arm_get_bfd_for_interworking. */ + if (bfd_for_interwork != NULL) + bfd_elf32_arm_get_bfd_for_interworking (bfd_for_interwork, &link_info); } - return false; -} - -/* This function is called for each possible name for a dynamic object - named by a DT_NEEDED entry. The FORCE parameter indicates whether - to skip the check for a conflicting version. */ - -static boolean -gld${EMULATION_NAME}_try_needed (name, force) - const char *name; - int force; -{ - bfd *abfd; - - abfd = bfd_openr (name, bfd_get_target (output_bfd)); - if (abfd == NULL) - return false; - if (! bfd_check_format (abfd, bfd_object)) - { - (void) bfd_close (abfd); - return false; - } - if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0) - { - (void) bfd_close (abfd); - return false; - } + bfd_elf32_arm_set_byteswap_code (&link_info, byteswap_code); - /* Check whether this object would include any conflicting library - versions. If FORCE is set, then we skip this check; we use this - the second time around, if we couldn't find any compatible - instance of the shared library. */ + /* Choose type of VFP11 erratum fix, or warn if specified fix is unnecessary + due to architecture version. */ + bfd_elf32_arm_set_vfp11_fix (link_info.output_bfd, &link_info); - if (! force) + /* We should be able to set the size of the interworking stub section. We + can't do it until later if we have dynamic sections, though. */ + if (! elf_hash_table (&link_info)->dynamic_sections_created) { - struct bfd_link_needed_list *needed; - - if (! bfd_elf_get_bfd_needed_list (abfd, &needed)) - einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd); - - if (needed != NULL) + /* Here we rummage through the found bfds to collect glue information. */ + LANG_FOR_EACH_INPUT_STATEMENT (is) { - global_vercheck_needed = needed; - global_vercheck_failed = false; - lang_for_each_input_file (gld${EMULATION_NAME}_vercheck); - if (global_vercheck_failed) - { - (void) bfd_close (abfd); - /* Return false to force the caller to move on to try - another file on the search path. */ - return false; - } - - /* But wait! It gets much worse. On Linux, if a shared - library does not use libc at all, we are supposed to skip - it the first time around in case we encounter a shared - library later on with the same name which does use the - version of libc that we want. This is much too horrible - to use on any system other than Linux. */ - -EOF -case ${target} in - *-*-linux-gnu*) - cat >>e${EMULATION_NAME}.c <next) - if (strncmp (l->name, "libc.so", 7) == 0) - break; - if (l == NULL) - { - (void) bfd_close (abfd); - return false; - } - } + /* Initialise mapping tables for code/data. */ + bfd_elf32_arm_init_maps (is->the_bfd); -EOF - ;; -esac -cat >>e${EMULATION_NAME}.c <the_bfd, + &link_info) + || !bfd_elf32_arm_vfp11_erratum_scan (is->the_bfd, &link_info)) + /* xgettext:c-format */ + einfo (_("Errors encountered processing file %s"), is->filename); } } - /* We've found a dynamic object matching the DT_NEEDED entry. */ - - /* We have already checked that there is no other input file of the - same name. We must now check again that we are not including the - same file twice. We need to do this because on many systems - libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will - reference libc.so.1. If we have already included libc.so, we - don't want to include libc.so.1 if they are the same file, and we - can only check that using stat. */ - - if (bfd_stat (abfd, &global_stat) != 0) - einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd); - global_found = false; - lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed); - if (global_found) - { - /* Return true to indicate that we found the file, even though - we aren't going to do anything with it. */ - return true; - } - - /* Tell the ELF backend that don't want the output file to have a - DT_NEEDED entry for this file. */ - bfd_elf_set_dt_needed_name (abfd, ""); - - /* Add this file into the symbol table. */ - if (! bfd_link_add_symbols (abfd, &link_info)) - einfo ("%F%B: could not read symbols: %E\n", abfd); + /* Call the standard elf routine. */ + gld${EMULATION_NAME}_before_allocation (); - return true; + /* We have seen it all. Allocate it, and carry on. */ + bfd_elf32_arm_allocate_interworking_sections (& link_info); } -/* See if an input file matches a DT_NEEDED entry by name. */ - static void -gld${EMULATION_NAME}_check_needed (s) - lang_input_statement_type *s; +arm_elf_after_allocation (void) { - if (global_found) - return; - - if (s->filename != NULL - && strcmp (s->filename, global_needed->name) == 0) - { - global_found = true; - return; - } - - if (s->the_bfd != NULL) - { - const char *soname; + /* Call the standard elf routine. */ + after_allocation_default (); - soname = bfd_elf_get_dt_soname (s->the_bfd); - if (soname != NULL - && strcmp (soname, global_needed->name) == 0) - { - global_found = true; - return; - } - } - - if (s->search_dirs_flag - && s->filename != NULL - && strchr (global_needed->name, '/') == NULL) - { - const char *f; - - f = strrchr (s->filename, '/'); - if (f != NULL - && strcmp (f + 1, global_needed->name) == 0) - { - global_found = true; - return; - } - } + { + LANG_FOR_EACH_INPUT_STATEMENT (is) + { + /* Figure out where VFP11 erratum veneers (and the labels returning + from same) have been placed. */ + bfd_elf32_arm_vfp11_fix_veneer_locations (is->the_bfd, &link_info); + } + } } -/* See if an input file matches a DT_NEEDED entry by running stat on - the file. */ - static void -gld${EMULATION_NAME}_stat_needed (s) - lang_input_statement_type *s; +arm_elf_finish (void) { - struct stat st; - const char *suffix; - const char *soname; - const char *f; + struct bfd_link_hash_entry * h; - if (global_found) - return; - if (s->the_bfd == NULL) - return; + /* Call the elf32.em routine. */ + gld${EMULATION_NAME}_finish (); - if (bfd_stat (s->the_bfd, &st) != 0) + if (thumb_entry_symbol) { - einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd); - return; + h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, + FALSE, FALSE, TRUE); } - - if (st.st_dev == global_stat.st_dev - && st.st_ino == global_stat.st_ino) - { - global_found = true; - return; - } - - /* We issue a warning if it looks like we are including two - different versions of the same shared library. For example, - there may be a problem if -lc picks up libc.so.6 but some other - shared library has a DT_NEEDED entry of libc.so.5. This is a - hueristic test, and it will only work if the name looks like - NAME.so.VERSION. FIXME: Depending on file names is error-prone. - If we really want to issue warnings about mixing version numbers - of shared libraries, we need to find a better way. */ - - if (strchr (global_needed->name, '/') != NULL) - return; - suffix = strstr (global_needed->name, ".so."); - if (suffix == NULL) - return; - suffix += sizeof ".so." - 1; - - soname = bfd_elf_get_dt_soname (s->the_bfd); - if (soname == NULL) - soname = s->filename; - - f = strrchr (soname, '/'); - if (f != NULL) - ++f; - else - f = soname; - - if (strncmp (f, global_needed->name, suffix - global_needed->name) == 0) - einfo ("%P: warning: %s, needed by %B, may conflict with %s\n", - global_needed->name, global_needed->by, f); -} - -/* On Linux, it's possible to have different versions of the same - shared library linked against different versions of libc. The - dynamic linker somehow tags which libc version to use in - /etc/ld.so.cache, and, based on the libc that it sees in the - executable, chooses which version of the shared library to use. - - We try to do a similar check here by checking whether this shared - library needs any other shared libraries which may conflict with - libraries we have already included in the link. If it does, we - skip it, and try to find another shared library farther on down the - link path. - - This is called via lang_for_each_input_file. - GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object - which we ar checking. This sets GLOBAL_VERCHECK_FAILED if we find - a conflicting version. */ - -static void -gld${EMULATION_NAME}_vercheck (s) - lang_input_statement_type *s; -{ - const char *soname, *f; - struct bfd_link_needed_list *l; - - if (global_vercheck_failed) - return; - if (s->the_bfd == NULL - || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0) - return; - - soname = bfd_elf_get_dt_soname (s->the_bfd); - if (soname == NULL) - soname = bfd_get_filename (s->the_bfd); - - f = strrchr (soname, '/'); - if (f != NULL) - ++f; else - f = soname; - - for (l = global_vercheck_needed; l != NULL; l = l->next) { - const char *suffix; + struct elf_link_hash_entry * eh; - if (strcmp (f, l->name) == 0) - { - /* Probably can't happen, but it's an easy check. */ - continue; - } + if (!entry_symbol.name) + return; - if (strchr (l->name, '/') != NULL) - continue; - - suffix = strstr (l->name, ".so."); - if (suffix == NULL) - continue; - - suffix += sizeof ".so." - 1; - - if (strncmp (f, l->name, suffix - l->name) == 0) - { - /* Here we know that S is a dynamic object FOO.SO.VER1, and - the object we are considering needs a dynamic object - FOO.SO.VER2, and VER1 and VER2 are different. This - appears to be a version mismatch, so we tell the caller - to try a different version of this library. */ - global_vercheck_failed = true; - return; - } + h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name, + FALSE, FALSE, TRUE); + eh = (struct elf_link_hash_entry *)h; + if (!h || ELF_ST_TYPE(eh->type) != STT_ARM_TFUNC) + return; } -} - -/* Place an orphan section. We use this to put random SHF_ALLOC - sections in the right segment. */ - -static asection *hold_section; -static lang_output_section_statement_type *hold_use; -static lang_output_section_statement_type *hold_text; -static lang_output_section_statement_type *hold_rodata; -static lang_output_section_statement_type *hold_data; -static lang_output_section_statement_type *hold_bss; -static lang_output_section_statement_type *hold_rel; -static lang_output_section_statement_type *hold_interp; -/*ARGSUSED*/ -static boolean -gld${EMULATION_NAME}_place_orphan (file, s) - lang_input_statement_type *file; - asection *s; -{ - lang_output_section_statement_type *place; - asection *snew, **pps; - lang_statement_list_type *old; - lang_statement_list_type add; - etree_type *address; - const char *secname, *ps; - const char *outsecname; - lang_output_section_statement_type *os; - - if ((s->flags & SEC_ALLOC) == 0) - return false; - /* Look through the script to see where to place this section. */ - hold_section = s; - hold_use = NULL; - lang_for_each_statement (gld${EMULATION_NAME}_place_section); - - if (hold_use != NULL) + 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) { - /* We have already placed a section with this name. */ - wild_doit (&hold_use->children, s, hold_use, file); - return true; + 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 (link_info.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 (thumb_entry_symbol != NULL && 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; } - - secname = bfd_get_section_name (s->owner, s); - - /* If this is a final link, then always put .gnu.warning.SYMBOL - sections into the .text section to get them out of the way. */ - if (! link_info.shared - && ! link_info.relocateable - && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0 - && hold_text != NULL) - { - wild_doit (&hold_text->children, s, hold_text, file); - return true; - } - - /* Decide which segment the section should go in based on the - section name and section flags. We put loadable .note sections - right after the .interp section, so that the PT_NOTE segment is - stored right after the program headers where the OS can read it - in the first page. */ - place = NULL; - if (s->flags & SEC_EXCLUDE) - return false; - else if ((s->flags & SEC_LOAD) != 0 - && strncmp (secname, ".note", 4) == 0 - && hold_interp != NULL) - place = hold_interp; - else if ((s->flags & SEC_HAS_CONTENTS) == 0 - && hold_bss != NULL) - place = hold_bss; - else if ((s->flags & SEC_READONLY) == 0 - && hold_data != NULL) - place = hold_data; - else if (strncmp (secname, ".rel", 4) == 0 - && hold_rel != NULL) - place = hold_rel; - else if ((s->flags & SEC_CODE) == 0 - && (s->flags & SEC_READONLY) != 0 - && hold_rodata != NULL) - place = hold_rodata; - else if ((s->flags & SEC_READONLY) != 0 - && hold_text != NULL) - place = hold_text; - if (place == NULL) - return false; - - /* 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 = secname; - 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); - - outsecname = newname; - } - - /* Create the section in the output file, and put it in the right - place. This shuffling is to make the output file look neater. */ - snew = bfd_make_section (output_bfd, outsecname); - if (snew == NULL) - einfo ("%P%F: output format %s cannot represent section called %s\n", - output_bfd->xvec->name, outsecname); - if (place->bfd_section != NULL) - { - for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next) - ; - *pps = snew->next; - snew->next = place->bfd_section->next; - place->bfd_section->next = snew; - } - - /* Start building a list of statements for this section. */ - old = stat_ptr; - stat_ptr = &add; - lang_list_init (stat_ptr); - - /* 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' && config.build_constructors) - { - char *symname; - - symname = (char *) xmalloc (ps - outsecname + sizeof "__start_"); - sprintf (symname, "__start_%s", outsecname); - lang_add_assignment (exp_assop ('=', symname, - exp_unop (ALIGN_K, - exp_intop ((bfd_vma) 1 - << s->alignment_power)))); - } - - if (! link_info.relocateable) - address = NULL; else - address = exp_intop ((bfd_vma) 0); - - lang_enter_output_section_statement (outsecname, address, 0, - (bfd_vma) 0, - (etree_type *) NULL, - (etree_type *) NULL, - (etree_type *) NULL); - - os = lang_output_section_statement_lookup (outsecname); - wild_doit (&os->children, s, os, file); - - lang_leave_output_section_statement - ((bfd_vma) 0, "*default*", (struct lang_output_section_phdr_list *) NULL); - stat_ptr = &add; - - if (*ps == '\0' && config.build_constructors) - { - char *symname; - - symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_"); - sprintf (symname, "__stop_%s", outsecname); - lang_add_assignment (exp_assop ('=', symname, - exp_nameop (NAME, "."))); - } - - /* Now stick the new statement list right after PLACE. */ - *add.tail = place->header.next; - place->header.next = add.head; - - stat_ptr = old; - - return true; + einfo (_("%P: warning: cannot find thumb start symbol %s\n"), + thumb_entry_symbol); } +/* This is a convenient point to tell BFD about target specific flags. + After the output has been created, but before inputs are read. */ static void -gld${EMULATION_NAME}_place_section (s) - lang_statement_union_type *s; +arm_elf_create_output_section_statements (void) { - lang_output_section_statement_type *os; - - if (s->header.type != lang_output_section_statement_enum) - return; - - os = &s->output_section_statement; - - if (strcmp (os->name, hold_section->name) == 0 - && os->bfd_section != NULL - && ((hold_section->flags & (SEC_LOAD | SEC_ALLOC)) - == (os->bfd_section->flags & (SEC_LOAD | SEC_ALLOC)))) - hold_use = os; - - if (strcmp (os->name, ".text") == 0) - hold_text = os; - else if (strcmp (os->name, ".rodata") == 0) - hold_rodata = os; - else if (strcmp (os->name, ".data") == 0) - hold_data = os; - else if (strcmp (os->name, ".bss") == 0) - hold_bss = os; - else if (hold_rel == NULL - && os->bfd_section != NULL - && (os->bfd_section->flags & SEC_ALLOC) != 0 - && strncmp (os->name, ".rel", 4) == 0) - hold_rel = os; - else if (strcmp (os->name, ".interp") == 0) - hold_interp = os; + bfd_elf32_arm_set_target_relocs (link_info.output_bfd, &link_info, + target1_is_rel, + target2_type, fix_v4bx, use_blx, + vfp11_denorm_fix, no_enum_size_warning, + pic_veneer); } -/* Look through an expression for an assignment statement. */ - -static void -gld${EMULATION_NAME}_find_exp_assignment (exp) - etree_type *exp; -{ - struct bfd_link_hash_entry *h; - - switch (exp->type.node_class) - { - case etree_provide: - h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst, - false, false, false); - if (h == NULL) - break; - - /* We call record_link_assignment even if the symbol is defined. - This is because if it is defined by a dynamic object, we - actually want to use the value defined by the linker script, - not the value from the dynamic object (because we are setting - symbols like etext). If the symbol is defined by a regular - object, then, as it happens, calling record_link_assignment - will do no harm. */ +EOF - /* Fall through. */ - case etree_assign: - if (strcmp (exp->assign.dst, ".") != 0) - { - if (! (bfd_elf${ELFSIZE}_record_link_assignment - (output_bfd, &link_info, exp->assign.dst, - exp->type.node_class == etree_provide ? true : false))) - einfo ("%P%F: failed to record assignment to %s: %E\n", - exp->assign.dst); - } - gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src); +# Define some shell vars to insert bits of code into the standard elf +# parse_args and list_options functions. +# +PARSE_AND_LIST_PROLOGUE=' +#define OPTION_THUMB_ENTRY 301 +#define OPTION_BE8 302 +#define OPTION_TARGET1_REL 303 +#define OPTION_TARGET1_ABS 304 +#define OPTION_TARGET2 305 +#define OPTION_FIX_V4BX 306 +#define OPTION_USE_BLX 307 +#define OPTION_VFP11_DENORM_FIX 308 +#define OPTION_NO_ENUM_SIZE_WARNING 309 +#define OPTION_PIC_VENEER 310 +#define OPTION_FIX_V4BX_INTERWORKING 311 +' + +PARSE_AND_LIST_SHORTOPTS=p + +PARSE_AND_LIST_LONGOPTS=' + { "no-pipeline-knowledge", no_argument, NULL, '\'p\''}, + { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, + { "be8", no_argument, NULL, OPTION_BE8}, + { "target1-rel", no_argument, NULL, OPTION_TARGET1_REL}, + { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS}, + { "target2", required_argument, NULL, OPTION_TARGET2}, + { "fix-v4bx", no_argument, NULL, OPTION_FIX_V4BX}, + { "fix-v4bx-interworking", no_argument, NULL, OPTION_FIX_V4BX_INTERWORKING}, + { "use-blx", no_argument, NULL, OPTION_USE_BLX}, + { "vfp11-denorm-fix", required_argument, NULL, OPTION_VFP11_DENORM_FIX}, + { "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING}, + { "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER}, +' + +PARSE_AND_LIST_OPTIONS=' + fprintf (file, _(" --thumb-entry= Set the entry point to be Thumb symbol \n")); + fprintf (file, _(" --be8 Oputput BE8 format image\n")); + fprintf (file, _(" --target1=rel Interpret R_ARM_TARGET1 as R_ARM_REL32\n")); + fprintf (file, _(" --target1=abs Interpret R_ARM_TARGET1 as R_ARM_ABS32\n")); + fprintf (file, _(" --target2= Specify definition of R_ARM_TARGET2\n")); + fprintf (file, _(" --fix-v4bx Rewrite BX rn as MOV pc, rn for ARMv4\n")); + fprintf (file, _(" --fix-v4bx-interworking Rewrite BX rn branch to ARMv4 interworking veneer\n")); + fprintf (file, _(" --use-blx Enable use of BLX instructions\n")); + fprintf (file, _(" --vfp11-denorm-fix Specify how to fix VFP11 denorm erratum\n")); + fprintf (file, _(" --no-enum-size-warning Don'\''t warn about objects with incompatible" + " enum sizes\n")); + fprintf (file, _(" --pic-veneer Always generate PIC interworking veneers\n")); +' + +PARSE_AND_LIST_ARGS_CASES=' + case '\'p\'': + /* Only here for backwards compatibility. */ break; - case etree_binary: - gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs); - gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs); + case OPTION_THUMB_ENTRY: + thumb_entry_symbol = optarg; break; - case etree_trinary: - gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond); - gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs); - gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs); + case OPTION_BE8: + byteswap_code = 1; break; - case etree_unary: - gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child); + case OPTION_TARGET1_REL: + target1_is_rel = 1; break; - default: + case OPTION_TARGET1_ABS: + target1_is_rel = 0; break; - } -} - -/* This is called by the before_allocation routine via - lang_for_each_statement. It locates any assignment statements, and - tells the ELF backend about them, in case they are assignments to - symbols which are referred to by dynamic objects. */ - -static void -gld${EMULATION_NAME}_find_statement_assignment (s) - lang_statement_union_type *s; -{ - if (s->header.type == lang_assignment_statement_enum) - gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp); -} - -/* This is called after the sections have been attached to output - sections, but before any sizes or addresses have been set. */ - -static void -gld${EMULATION_NAME}_before_allocation () -{ - const char *rpath; - asection *sinterp; - - /* If we are going to make any variable assignments, we need to let - the ELF backend know about them in case the variables are - referred to by dynamic objects. */ - lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment); - - /* Let the ELF backend work out the sizes of any sections required - by dynamic linking. */ - rpath = command_line.rpath; - if (rpath == NULL) - rpath = (const char *) getenv ("LD_RUN_PATH"); - if (! (bfd_elf${ELFSIZE}_size_dynamic_sections - (output_bfd, command_line.soname, rpath, - command_line.export_dynamic, command_line.filter_shlib, - (const char * const *) command_line.auxiliary_filters, - &link_info, &sinterp, lang_elf_version_info))) - einfo ("%P%F: failed to set dynamic section sizes: %E\n"); - - /* Let the user override the dynamic linker we are using. */ - if (command_line.interpreter != NULL - && sinterp != NULL) - { - sinterp->contents = (bfd_byte *) command_line.interpreter; - sinterp->_raw_size = strlen (command_line.interpreter) + 1; - } - - /* Look for any sections named .gnu.warning. As a GNU extensions, - we treat such sections as containing warning messages. We print - out the warning message, and then zero out the section size so - that it does not get copied into the output file. */ - - { - LANG_FOR_EACH_INPUT_STATEMENT (is) - { - asection *s; - bfd_size_type sz; - char *msg; - boolean ret; - - if (is->just_syms_flag) - continue; - s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning"); - if (s == NULL) - continue; - - sz = bfd_section_size (is->the_bfd, s); - msg = xmalloc ((size_t) sz + 1); - if (! bfd_get_section_contents (is->the_bfd, s, msg, (file_ptr) 0, sz)) - einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n", - is->the_bfd); - msg[sz] = '\0'; - ret = link_info.callbacks->warning (&link_info, msg, - (const char *) NULL, - is->the_bfd, (asection *) NULL, - (bfd_vma) 0); - ASSERT (ret); - free (msg); - - /* Clobber the section size, so that we don't waste copying the - warning into the output file. */ - s->_raw_size = 0; - } - } - - /* 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_elf32_arm_process_before_allocation (is->the_bfd, &link_info)) - { - /* xgettext:c-format */ - einfo (_("Errors encountered processing file %s"), is->filename); - } - } - } - - /* We have seen it all. Allocate it, and carry on */ - bfd_elf32_arm_allocate_interworking_sections (& link_info); -} - -static char * -gld${EMULATION_NAME}_get_script (isfile) - int *isfile; -EOF - -if test -n "$COMPILE_IN" -then -# Scripts compiled in. + case OPTION_TARGET2: + target2_type = optarg; + break; -# sed commands to quote an ld script as a C string. -sc="-f ${srcdir}/emultempl/stringify.sed" + case OPTION_FIX_V4BX: + fix_v4bx = 1; + break; -cat >>e${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 + case OPTION_USE_BLX: + use_blx = 1; + break; -else -# Scripts read from the filesystem. + case OPTION_VFP11_DENORM_FIX: + if (strcmp (optarg, "none") == 0) + vfp11_denorm_fix = BFD_ARM_VFP11_FIX_NONE; + else if (strcmp (optarg, "scalar") == 0) + vfp11_denorm_fix = BFD_ARM_VFP11_FIX_SCALAR; + else if (strcmp (optarg, "vector") == 0) + vfp11_denorm_fix = BFD_ARM_VFP11_FIX_VECTOR; + else + einfo (_("Unrecognized VFP11 fix type '\''%s'\''.\n"), optarg); + break; -cat >>e${EMULATION_NAME}.c <>e${EMULATION_NAME}.c <