X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=ld%2Fldlang.c;h=317e445cd19e29ebd0739d7f5a3247d00fa07457;hb=eda680f805f57e7acae71350b98c9cfabbda9a58;hp=913f2b28a7e66b54bd192b5722a1444284f02e25;hpb=dfa7b0b81709461db624556e4826b98994533f05;p=deliverable%2Fbinutils-gdb.git diff --git a/ld/ldlang.c b/ld/ldlang.c index 913f2b28a7..317e445cd1 100644 --- a/ld/ldlang.c +++ b/ld/ldlang.c @@ -1,6 +1,6 @@ /* Linker command language support. Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, - 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 + 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. This file is part of the GNU Binutils. @@ -23,6 +23,7 @@ #include "sysdep.h" #include "bfd.h" #include "libiberty.h" +#include "filenames.h" #include "safe-ctype.h" #include "obstack.h" #include "bfdlink.h" @@ -40,6 +41,10 @@ #include "fnmatch.h" #include "demangle.h" #include "hashtab.h" +#include "libbfd.h" +#ifdef ENABLE_PLUGINS +#include "plugin.h" +#endif /* ENABLE_PLUGINS */ #ifndef offsetof #define offsetof(TYPE, MEMBER) ((size_t) & (((TYPE*) 0)->MEMBER)) @@ -51,7 +56,6 @@ static struct obstack map_obstack; #define obstack_chunk_alloc xmalloc #define obstack_chunk_free free -static const char *startup_file; static const char *entry_symbol_default = "start"; static bfd_boolean placed_commons = FALSE; static bfd_boolean stripped_excluded_sections = FALSE; @@ -65,7 +69,6 @@ static struct bfd_hash_table lang_definedness_table; static lang_statement_list_type *stat_save[10]; static lang_statement_list_type **stat_save_ptr = &stat_save[0]; static struct unique_sections *unique_section_list; -static bfd_boolean ldlang_sysrooted_script = FALSE; /* Forward declarations. */ static void exp_init_os (etree_type *); @@ -96,14 +99,15 @@ lang_statement_list_type file_chain = { NULL, NULL }; lang_statement_list_type input_file_chain; struct bfd_sym_chain entry_symbol = { NULL, NULL }; const char *entry_section = ".text"; +struct lang_input_statement_flags input_flags; bfd_boolean entry_from_cmdline; +bfd_boolean undef_from_cmdline; bfd_boolean lang_has_input_file = FALSE; bfd_boolean had_output_filename = FALSE; bfd_boolean lang_float_flag = FALSE; bfd_boolean delete_output_file_on_failure = FALSE; struct lang_phdr *lang_phdr_list; struct lang_nocrossrefs *nocrossref_list; -bfd_boolean missing_file = FALSE; /* Functions that traverse the linker script and might evaluate DEFINED() need to increment this. */ @@ -258,7 +262,7 @@ walk_wild_consider_section (lang_wild_statement_type *ptr, return; } - (*callback) (ptr, sec, s, file, data); + (*callback) (ptr, sec, s, ptr->section_flag_list, file, data); } /* Lowest common denominator routine that can handle everything correctly, @@ -277,7 +281,7 @@ walk_wild_section_general (lang_wild_statement_type *ptr, { sec = ptr->section_list; if (sec == NULL) - (*callback) (ptr, sec, s, file, data); + (*callback) (ptr, sec, s, ptr->section_flag_list, file, data); while (sec != NULL) { @@ -366,18 +370,70 @@ match_simple_wild (const char *pattern, const char *name) return TRUE; } +/* Return the numerical value of the init_priority attribute from + section name NAME. */ + +static unsigned long +get_init_priority (const char *name) +{ + char *end; + unsigned long init_priority; + + /* GCC uses the following section names for the init_priority + attribute with numerical values 101 and 65535 inclusive. A + lower value means a higher priority. + + 1: .init_array.NNNN/.fini_array.NNNN: Where NNNN is the + decimal numerical value of the init_priority attribute. + The order of execution in .init_array is forward and + .fini_array is backward. + 2: .ctors.NNNN/.ctors.NNNN: Where NNNN is 65535 minus the + decimal numerical value of the init_priority attribute. + The order of execution in .ctors is backward and .dtors + is forward. + */ + if (strncmp (name, ".init_array.", 12) == 0 + || strncmp (name, ".fini_array.", 12) == 0) + { + init_priority = strtoul (name + 12, &end, 10); + return *end ? 0 : init_priority; + } + else if (strncmp (name, ".ctors.", 7) == 0 + || strncmp (name, ".dtors.", 7) == 0) + { + init_priority = strtoul (name + 7, &end, 10); + return *end ? 0 : 65535 - init_priority; + } + + return 0; +} + /* Compare sections ASEC and BSEC according to SORT. */ static int compare_section (sort_type sort, asection *asec, asection *bsec) { int ret; + unsigned long ainit_priority, binit_priority; switch (sort) { default: abort (); + case by_init_priority: + ainit_priority + = get_init_priority (bfd_get_section_name (asec->owner, asec)); + binit_priority + = get_init_priority (bfd_get_section_name (bsec->owner, bsec)); + if (ainit_priority == 0 || binit_priority == 0) + goto sort_by_name; + ret = ainit_priority - binit_priority; + if (ret) + break; + else + goto sort_by_name; + case by_alignment_name: ret = (bfd_section_alignment (bsec->owner, bsec) - bfd_section_alignment (asec->owner, asec)); @@ -386,6 +442,7 @@ compare_section (sort_type sort, asection *asec, asection *bsec) /* Fall through. */ case by_name: +sort_by_name: ret = strcmp (bfd_get_section_name (asec->owner, asec), bfd_get_section_name (bsec->owner, bsec)); break; @@ -446,6 +503,7 @@ static void output_section_callback_fast (lang_wild_statement_type *ptr, struct wildcard_list *sec, asection *section, + struct flag_info *sflag_list ATTRIBUTE_UNUSED, lang_input_statement_type *file, void *output) { @@ -478,7 +536,7 @@ output_section_callback_tree_to_list (lang_wild_statement_type *ptr, if (tree->left) output_section_callback_tree_to_list (ptr, tree->left, output); - lang_add_section (&ptr->children, tree->section, + lang_add_section (&ptr->children, tree->section, NULL, (lang_output_section_statement_type *) output); if (tree->right) @@ -670,7 +728,7 @@ walk_wild_section (lang_wild_statement_type *ptr, callback_t callback, void *data) { - if (file->just_syms_flag) + if (file->flags.just_syms) return; (*ptr->walk_wild_section_handler) (ptr, file, callback, data); @@ -871,9 +929,10 @@ walk_wild (lang_wild_statement_type *s, callback_t callback, void *data) } /* lang_for_each_statement walks the parse tree and calls the provided - function for each node. */ + function for each node, except those inside output section statements + with constraint set to -1. */ -static void +void lang_for_each_statement_worker (void (*func) (lang_statement_union_type *), lang_statement_union_type *s) { @@ -887,8 +946,9 @@ lang_for_each_statement_worker (void (*func) (lang_statement_union_type *), lang_for_each_statement_worker (func, constructor_list.head); break; case lang_output_section_statement_enum: - lang_for_each_statement_worker - (func, s->output_section_statement.children.head); + if (s->output_section_statement.constraint != -1) + lang_for_each_statement_worker + (func, s->output_section_statement.children.head); break; case lang_wild_statement_enum: lang_for_each_statement_worker (func, @@ -983,6 +1043,8 @@ new_afile (const char *name, { lang_input_statement_type *p; + lang_has_input_file = TRUE; + if (add_to_list) p = (lang_input_statement_type *) new_stat (lang_input_statement, stat_ptr); else @@ -993,9 +1055,14 @@ new_afile (const char *name, p->header.next = NULL; } - lang_has_input_file = TRUE; + memset (&p->the_bfd, 0, + sizeof (*p) - offsetof (lang_input_statement_type, the_bfd)); p->target = target; - p->sysrooted = FALSE; + p->flags.dynamic = input_flags.dynamic; + p->flags.add_DT_NEEDED_for_dynamic = input_flags.add_DT_NEEDED_for_dynamic; + p->flags.add_DT_NEEDED_for_regular = input_flags.add_DT_NEEDED_for_regular; + p->flags.whole_archive = input_flags.whole_archive; + p->flags.sysrooted = input_flags.sysrooted; if (file_type == lang_input_file_is_l_enum && name[0] == ':' && name[1] != '\0') @@ -1008,65 +1075,40 @@ new_afile (const char *name, { case lang_input_file_is_symbols_only_enum: p->filename = name; - p->is_archive = FALSE; - p->real = TRUE; p->local_sym_name = name; - p->just_syms_flag = TRUE; - p->search_dirs_flag = FALSE; + p->flags.real = TRUE; + p->flags.just_syms = TRUE; break; case lang_input_file_is_fake_enum: p->filename = name; - p->is_archive = FALSE; - p->real = FALSE; p->local_sym_name = name; - p->just_syms_flag = FALSE; - p->search_dirs_flag = FALSE; break; case lang_input_file_is_l_enum: - p->is_archive = TRUE; p->filename = name; - p->real = TRUE; p->local_sym_name = concat ("-l", name, (const char *) NULL); - p->just_syms_flag = FALSE; - p->search_dirs_flag = TRUE; + p->flags.maybe_archive = TRUE; + p->flags.real = TRUE; + p->flags.search_dirs = TRUE; break; case lang_input_file_is_marker_enum: p->filename = name; - p->is_archive = FALSE; - p->real = FALSE; p->local_sym_name = name; - p->just_syms_flag = FALSE; - p->search_dirs_flag = TRUE; + p->flags.search_dirs = TRUE; break; case lang_input_file_is_search_file_enum: - p->sysrooted = ldlang_sysrooted_script; p->filename = name; - p->is_archive = FALSE; - p->real = TRUE; p->local_sym_name = name; - p->just_syms_flag = FALSE; - p->search_dirs_flag = TRUE; + p->flags.real = TRUE; + p->flags.search_dirs = TRUE; break; case lang_input_file_is_file_enum: p->filename = name; - p->is_archive = FALSE; - p->real = TRUE; p->local_sym_name = name; - p->just_syms_flag = FALSE; - p->search_dirs_flag = FALSE; + p->flags.real = TRUE; break; default: FAIL (); } - p->the_bfd = NULL; - p->next_real_file = NULL; - p->next = NULL; - p->dynamic = config.dynamic_link; - p->add_DT_NEEDED_for_dynamic = add_DT_NEEDED_for_dynamic; - p->add_DT_NEEDED_for_regular = add_DT_NEEDED_for_regular; - p->whole_archive = whole_archive; - p->loaded = FALSE; - p->missing_file = FALSE; lang_statement_append (&input_file_chain, (lang_statement_union_type *) p, @@ -1216,7 +1258,7 @@ lang_finish (void) already been created. If we are not inside a MEMORY block it is dubious to use an undeclared region name (except DEFAULT_MEMORY_REGION) and so we issue a warning. - + Each region has at least one name. The first name is either DEFAULT_MEMORY_REGION or the name given in the MEMORY block. You can add alias names to an existing region within a script with @@ -1244,12 +1286,13 @@ lang_memory_region_lookup (const char *const name, bfd_boolean create) { if (create) einfo (_("%P:%S: warning: redeclaration of memory region `%s'\n"), - name); + NULL, name); return r; } if (!create && strcmp (name, DEFAULT_MEMORY_REGION)) - einfo (_("%P:%S: warning: memory region `%s' not declared\n"), name); + einfo (_("%P:%S: warning: memory region `%s' not declared\n"), + NULL, name); new_region = (lang_memory_region_type *) stat_alloc (sizeof (lang_memory_region_type)); @@ -1283,7 +1326,7 @@ lang_memory_region_alias (const char * alias, const char * region_name) the default memory region. */ if (strcmp (region_name, DEFAULT_MEMORY_REGION) == 0 || strcmp (alias, DEFAULT_MEMORY_REGION) == 0) - einfo (_("%F%P:%S: error: alias for default memory region\n")); + einfo (_("%F%P:%S: error: alias for default memory region\n"), NULL); /* Look for the target region and check if the alias is not already in use. */ @@ -1296,15 +1339,14 @@ lang_memory_region_alias (const char * alias, const char * region_name) if (strcmp (n->name, alias) == 0) einfo (_("%F%P:%S: error: redefinition of memory region " "alias `%s'\n"), - alias); + NULL, alias); } /* Check if the target region exists. */ if (region == NULL) einfo (_("%F%P:%S: error: memory region `%s' " "for alias `%s' does not exist\n"), - region_name, - alias); + NULL, region_name, alias); /* Add alias to region name list. */ n = (lang_memory_region_name *) stat_alloc (sizeof (lang_memory_region_name)); @@ -1515,8 +1557,14 @@ lang_output_section_find_by_flags (const asection *sec, } flags ^= sec->flags; if (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD - | SEC_READONLY)) - && !(look->flags & (SEC_SMALL_DATA | SEC_THREAD_LOCAL))) + | SEC_READONLY | SEC_SMALL_DATA)) + || (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD + | SEC_READONLY)) + && !(look->flags & SEC_SMALL_DATA)) + || (!(flags & (SEC_THREAD_LOCAL | SEC_ALLOC)) + && (look->flags & SEC_THREAD_LOCAL) + && (!(flags & SEC_LOAD) + || (look->flags & SEC_LOAD)))) found = look; } } @@ -1742,26 +1790,34 @@ lang_insert_orphan (asection *s, if (*ps == '\0') { char *symname; - etree_type *e_align; symname = (char *) xmalloc (ps - secname + sizeof "__start_" + 1); symname[0] = bfd_get_symbol_leading_char (link_info.output_bfd); sprintf (symname + (symname[0] != 0), "__start_%s", secname); - e_align = exp_unop (ALIGN_K, - exp_intop ((bfd_vma) 1 << s->alignment_power)); - lang_add_assignment (exp_assop ('=', ".", e_align)); lang_add_assignment (exp_provide (symname, - exp_unop (ABSOLUTE, - exp_nameop (NAME, ".")), + exp_nameop (NAME, "."), FALSE)); } } if (add_child == NULL) add_child = &os->children; - lang_add_section (add_child, s, os); + lang_add_section (add_child, s, NULL, os); - lang_leave_output_section_statement (0, "*default*", NULL, NULL); + if (after && (s->flags & (SEC_LOAD | SEC_ALLOC)) != 0) + { + const char *region = (after->region + ? after->region->name_list.name + : DEFAULT_MEMORY_REGION); + const char *lma_region = (after->lma_region + ? after->lma_region->name_list.name + : NULL); + lang_leave_output_section_statement (NULL, region, after->phdrs, + lma_region); + } + else + lang_leave_output_section_statement (NULL, DEFAULT_MEMORY_REGION, NULL, + NULL); if (ps != NULL && *ps == '\0') { @@ -1925,7 +1981,7 @@ lang_map (void) asection *s; if ((file->the_bfd->flags & (BFD_LINKER_CREATED | DYNAMIC)) != 0 - || file->just_syms_flag) + || file->flags.just_syms) continue; for (s = file->the_bfd->sections; s != NULL; s = s->next) @@ -2147,7 +2203,7 @@ section_already_linked (bfd *abfd, asection *sec, void *data) /* If we are only reading symbols from this object, then we want to discard all sections. */ - if (entry->just_syms_flag) + if (entry->flags.just_syms) { bfd_link_just_syms (abfd, sec, &link_info); return; @@ -2164,17 +2220,19 @@ section_already_linked (bfd *abfd, asection *sec, void *data) foo.o(.text, .data). */ /* Add SECTION to the output section OUTPUT. Do this by creating a - lang_input_section statement which is placed at PTR. FILE is the - input file which holds SECTION. */ + lang_input_section statement which is placed at PTR. */ void lang_add_section (lang_statement_list_type *ptr, asection *section, + struct flag_info *sflag_info, lang_output_section_statement_type *output) { flagword flags = section->flags; + bfd_boolean discard; lang_input_section_type *new_section; + bfd *abfd = link_info.output_bfd; /* Discard sections marked with SEC_EXCLUDE. */ discard = (flags & SEC_EXCLUDE) != 0; @@ -2200,6 +2258,15 @@ lang_add_section (lang_statement_list_type *ptr, return; } + if (sflag_info) + { + bfd_boolean keep; + + keep = bfd_lookup_section_flags (&link_info, sflag_info, section); + if (!keep) + return; + } + if (section->output_section != NULL) return; @@ -2217,7 +2284,7 @@ lang_add_section (lang_statement_list_type *ptr, to see .text with SEC_LINK_ONCE set. */ if (!link_info.relocatable) - flags &= ~ (SEC_LINK_ONCE | SEC_LINK_DUPLICATES); + flags &= ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC); switch (output->sectype) { @@ -2230,6 +2297,14 @@ lang_add_section (lang_statement_list_type *ptr, case noload_section: flags &= ~SEC_LOAD; flags |= SEC_NEVER_LOAD; + /* Unfortunately GNU ld has managed to evolve two different + meanings to NOLOAD in scripts. ELF gets a .bss style noload, + alloc, no contents section. All others get a noload, noalloc + section. */ + if (bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour) + flags &= ~SEC_HAS_CONTENTS; + else + flags &= ~SEC_ALLOC; break; } @@ -2312,14 +2387,12 @@ wild_sort (lang_wild_statement_type *wild, lang_input_statement_type *file, asection *section) { - const char *section_name; lang_statement_union_type *l; if (!wild->filenames_sorted && (sec == NULL || sec->spec.sorted == none)) return NULL; - section_name = bfd_get_section_name (file->the_bfd, section); for (l = wild->children.head; l != NULL; l = l->header.next) { lang_input_section_type *ls; @@ -2365,7 +2438,7 @@ wild_sort (lang_wild_statement_type *wild, la = FALSE; } - i = strcmp (fn, ln); + i = filename_cmp (fn, ln); if (i > 0) continue; else if (i < 0) @@ -2378,7 +2451,7 @@ wild_sort (lang_wild_statement_type *wild, if (la) ln = ls->section->owner->filename; - i = strcmp (fn, ln); + i = filename_cmp (fn, ln); if (i > 0) continue; else if (i < 0) @@ -2404,6 +2477,7 @@ static void output_section_callback (lang_wild_statement_type *ptr, struct wildcard_list *sec, asection *section, + struct flag_info *sflag_info, lang_input_statement_type *file, void *output) { @@ -2424,14 +2498,14 @@ output_section_callback (lang_wild_statement_type *ptr, of the current list. */ if (before == NULL) - lang_add_section (&ptr->children, section, os); + lang_add_section (&ptr->children, section, sflag_info, os); else { lang_statement_list_type list; lang_statement_union_type **pp; lang_list_init (&list); - lang_add_section (&list, section, os); + lang_add_section (&list, section, sflag_info, os); /* If we are discarding the section, LIST.HEAD will be NULL. */ @@ -2457,6 +2531,7 @@ static void check_section_callback (lang_wild_statement_type *ptr ATTRIBUTE_UNUSED, struct wildcard_list *sec ATTRIBUTE_UNUSED, asection *section, + struct flag_info *sflag_info ATTRIBUTE_UNUSED, lang_input_statement_type *file ATTRIBUTE_UNUSED, void *output) { @@ -2491,7 +2566,7 @@ lookup_name (const char *name) const char *filename = search->local_sym_name; if (filename != NULL - && strcmp (filename, name) == 0) + && filename_cmp (filename, name) == 0) break; } @@ -2501,7 +2576,7 @@ lookup_name (const char *name) /* If we have already added this file, or this file is not real don't add this file. */ - if (search->loaded || !search->real) + if (search->flags.loaded || !search->flags.real) return search; if (! load_symbols (search, NULL)) @@ -2558,7 +2633,7 @@ check_excluded_libs (bfd *abfd) return; } - if (strncmp (lib->name, filename, len) == 0 + if (filename_ncmp (lib->name, filename, len) == 0 && (filename[len] == '\0' || (filename[len] == '.' && filename[len + 1] == 'a' && filename[len + 2] == '\0'))) @@ -2579,23 +2654,21 @@ load_symbols (lang_input_statement_type *entry, { char **matching; - if (entry->loaded) + if (entry->flags.loaded) return TRUE; ldfile_open_file (entry); /* Do not process further if the file was missing. */ - if (entry->missing_file) + if (entry->flags.missing_file) return TRUE; if (! bfd_check_format (entry->the_bfd, bfd_archive) && ! bfd_check_format_matches (entry->the_bfd, bfd_object, &matching)) { bfd_error_type err; - bfd_boolean save_ldlang_sysrooted_script; - bfd_boolean save_add_DT_NEEDED_for_regular; - bfd_boolean save_add_DT_NEEDED_for_dynamic; - bfd_boolean save_whole_archive; + struct lang_input_statement_flags save_flags; + extern FILE *yyin; err = bfd_get_error (); @@ -2621,31 +2694,31 @@ load_symbols (lang_input_statement_type *entry, entry->the_bfd = NULL; /* Try to interpret the file as a linker script. */ + save_flags = input_flags; ldfile_open_command_file (entry->filename); push_stat_ptr (place); - save_ldlang_sysrooted_script = ldlang_sysrooted_script; - ldlang_sysrooted_script = entry->sysrooted; - save_add_DT_NEEDED_for_regular = add_DT_NEEDED_for_regular; - add_DT_NEEDED_for_regular = entry->add_DT_NEEDED_for_regular; - save_add_DT_NEEDED_for_dynamic = add_DT_NEEDED_for_dynamic; - add_DT_NEEDED_for_dynamic = entry->add_DT_NEEDED_for_dynamic; - save_whole_archive = whole_archive; - whole_archive = entry->whole_archive; + input_flags.add_DT_NEEDED_for_regular + = entry->flags.add_DT_NEEDED_for_regular; + input_flags.add_DT_NEEDED_for_dynamic + = entry->flags.add_DT_NEEDED_for_dynamic; + input_flags.whole_archive = entry->flags.whole_archive; + input_flags.dynamic = entry->flags.dynamic; ldfile_assumed_script = TRUE; parser_input = input_script; - /* We want to use the same -Bdynamic/-Bstatic as the one for - ENTRY. */ - config.dynamic_link = entry->dynamic; yyparse (); ldfile_assumed_script = FALSE; - ldlang_sysrooted_script = save_ldlang_sysrooted_script; - add_DT_NEEDED_for_regular = save_add_DT_NEEDED_for_regular; - add_DT_NEEDED_for_dynamic = save_add_DT_NEEDED_for_dynamic; - whole_archive = save_whole_archive; + /* missing_file is sticky. sysrooted will already have been + restored when seeing EOF in yyparse, but no harm to restore + again. */ + save_flags.missing_file |= input_flags.missing_file; + input_flags = save_flags; pop_stat_ptr (); + fclose (yyin); + yyin = NULL; + entry->flags.loaded = TRUE; return TRUE; } @@ -2663,7 +2736,10 @@ load_symbols (lang_input_statement_type *entry, break; case bfd_object: - ldlang_add_file (entry); +#ifdef ENABLE_PLUGINS + if (!entry->flags.reload) +#endif + ldlang_add_file (entry); if (trace_files || trace_file_tries) info_msg ("%I\n", entry); break; @@ -2671,13 +2747,14 @@ load_symbols (lang_input_statement_type *entry, case bfd_archive: check_excluded_libs (entry->the_bfd); - if (entry->whole_archive) + if (entry->flags.whole_archive) { bfd *member = NULL; bfd_boolean loaded = TRUE; for (;;) { + bfd *subsbfd; member = bfd_openr_next_archived_file (entry->the_bfd, member); if (member == NULL) @@ -2690,29 +2767,33 @@ load_symbols (lang_input_statement_type *entry, loaded = FALSE; } - if (! ((*link_info.callbacks->add_archive_element) - (&link_info, member, "--whole-archive"))) + subsbfd = member; + if (!(*link_info.callbacks + ->add_archive_element) (&link_info, member, + "--whole-archive", &subsbfd)) abort (); - if (! bfd_link_add_symbols (member, &link_info)) + /* Potentially, the add_archive_element hook may have set a + substitute BFD for us. */ + if (!bfd_link_add_symbols (subsbfd, &link_info)) { einfo (_("%F%B: could not read symbols: %E\n"), member); loaded = FALSE; } } - entry->loaded = loaded; + entry->flags.loaded = loaded; return loaded; } break; } if (bfd_link_add_symbols (entry->the_bfd, &link_info)) - entry->loaded = TRUE; + entry->flags.loaded = TRUE; else einfo (_("%F%B: could not read symbols: %E\n"), entry->the_bfd); - return entry->loaded; + return entry->flags.loaded; } /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both @@ -2896,7 +2977,7 @@ get_first_input_target (void) LANG_FOR_EACH_INPUT_STATEMENT (s) { if (s->header.type == lang_input_statement_enum - && s->real) + && s->flags.real) { ldfile_open_file (s); @@ -2925,7 +3006,7 @@ lang_get_output_target (void) /* No - has the current target been set to something other than the default? */ - if (current_target != default_target) + if (current_target != default_target && current_target != NULL) return current_target; /* No - can we determine the format of the first input file? */ @@ -3076,26 +3157,37 @@ init_opb (void) /* Open all the input files. */ +enum open_bfd_mode + { + OPEN_BFD_NORMAL = 0, + OPEN_BFD_FORCE = 1, + OPEN_BFD_RESCAN = 2 + }; +#ifdef ENABLE_PLUGINS +static lang_input_statement_type *plugin_insert = NULL; +#endif + static void -open_input_bfds (lang_statement_union_type *s, bfd_boolean force) +open_input_bfds (lang_statement_union_type *s, enum open_bfd_mode mode) { for (; s != NULL; s = s->header.next) { switch (s->header.type) { case lang_constructors_statement_enum: - open_input_bfds (constructor_list.head, force); + open_input_bfds (constructor_list.head, mode); break; case lang_output_section_statement_enum: - open_input_bfds (s->output_section_statement.children.head, force); + open_input_bfds (s->output_section_statement.children.head, mode); break; case lang_wild_statement_enum: /* Maybe we should load the file's symbols. */ - if (s->wild_statement.filename + if ((mode & OPEN_BFD_RESCAN) == 0 + && s->wild_statement.filename && !wildcardp (s->wild_statement.filename) && !archive_path (s->wild_statement.filename)) lookup_name (s->wild_statement.filename); - open_input_bfds (s->wild_statement.children.head, force); + open_input_bfds (s->wild_statement.children.head, mode); break; case lang_group_statement_enum: { @@ -3108,7 +3200,8 @@ open_input_bfds (lang_statement_union_type *s, bfd_boolean force) do { undefs = link_info.hash->undefs_tail; - open_input_bfds (s->group_statement.children.head, TRUE); + open_input_bfds (s->group_statement.children.head, + mode | OPEN_BFD_FORCE); } while (undefs != link_info.hash->undefs_tail); } @@ -3117,7 +3210,7 @@ open_input_bfds (lang_statement_union_type *s, bfd_boolean force) current_target = s->target_statement.target; break; case lang_input_statement_enum: - if (s->input_statement.real) + if (s->input_statement.flags.real) { lang_statement_union_type **os_tail; lang_statement_list_type add; @@ -3127,13 +3220,32 @@ open_input_bfds (lang_statement_union_type *s, bfd_boolean force) /* If we are being called from within a group, and this is an archive which has already been searched, then force it to be researched unless the whole archive - has been loaded already. */ - if (force - && !s->input_statement.whole_archive - && s->input_statement.loaded + has been loaded already. Do the same for a rescan. */ + if (mode != OPEN_BFD_NORMAL +#ifdef ENABLE_PLUGINS + && ((mode & OPEN_BFD_RESCAN) == 0 + || plugin_insert == NULL) +#endif + && !s->input_statement.flags.whole_archive + && s->input_statement.flags.loaded + && s->input_statement.the_bfd != NULL && bfd_check_format (s->input_statement.the_bfd, bfd_archive)) - s->input_statement.loaded = FALSE; + s->input_statement.flags.loaded = FALSE; +#ifdef ENABLE_PLUGINS + /* When rescanning, reload --as-needed shared libs. */ + else if ((mode & OPEN_BFD_RESCAN) != 0 + && plugin_insert == NULL + && s->input_statement.flags.loaded + && s->input_statement.flags.add_DT_NEEDED_for_regular + && s->input_statement.the_bfd != NULL + && ((s->input_statement.the_bfd->flags) & DYNAMIC) != 0 + && plugin_should_reload (s->input_statement.the_bfd)) + { + s->input_statement.flags.loaded = FALSE; + s->input_statement.flags.reload = TRUE; + } +#endif os_tail = lang_output_section_statement.tail; lang_list_init (&add); @@ -3164,6 +3276,17 @@ open_input_bfds (lang_statement_union_type *s, bfd_boolean force) } } } +#ifdef ENABLE_PLUGINS + /* If we have found the point at which a plugin added new + files, clear plugin_insert to enable archive rescan. */ + if (&s->input_statement == plugin_insert) + plugin_insert = NULL; +#endif + break; + case lang_assignment_statement_enum: + if (s->assignment_statement.exp->assign.hidden) + /* This is from a --defsym on the command line. */ + exp_fold_tree_no_dot (s->assignment_statement.exp); break; default: break; @@ -3171,7 +3294,7 @@ open_input_bfds (lang_statement_union_type *s, bfd_boolean force) } /* Exit if any of the files were missing. */ - if (missing_file) + if (input_flags.missing_file) einfo ("%F"); } @@ -3265,11 +3388,12 @@ typedef struct bfd_sym_chain ldlang_undef_chain_list_type; #define ldlang_undef_chain_list_head entry_symbol.next void -ldlang_add_undef (const char *const name) +ldlang_add_undef (const char *const name, bfd_boolean cmdline) { - ldlang_undef_chain_list_type *new_undef = (ldlang_undef_chain_list_type *) - stat_alloc (sizeof (ldlang_undef_chain_list_type)); + ldlang_undef_chain_list_type *new_undef; + undef_from_cmdline = undef_from_cmdline || cmdline; + new_undef = (ldlang_undef_chain_list_type *) stat_alloc (sizeof (*new_undef)); new_undef->next = ldlang_undef_chain_list_head; ldlang_undef_chain_list_head = new_undef; @@ -3370,7 +3494,6 @@ update_wild_statements (lang_statement_union_type *s) break; case lang_wild_statement_enum: - sec = s->wild_statement.section_list; for (sec = s->wild_statement.section_list; sec != NULL; sec = sec->next) { @@ -3387,6 +3510,8 @@ update_wild_statements (lang_statement_union_type *s) if (sort_section == by_name) sec->spec.sorted = by_alignment_name; break; + case by_none: + sec->spec.sorted = none; default: break; } @@ -3398,8 +3523,11 @@ update_wild_statements (lang_statement_union_type *s) break; case lang_output_section_statement_enum: - update_wild_statements - (s->output_section_statement.children.head); + /* Don't sort .init/.fini sections. */ + if (strcmp (s->output_section_statement.name, ".init") != 0 + && strcmp (s->output_section_statement.name, ".fini") != 0) + update_wild_statements + (s->output_section_statement.children.head); break; case lang_group_statement_enum: @@ -3466,8 +3594,8 @@ map_input_to_output_sections /* Make sure that any sections mentioned in the expression are initialized. */ exp_init_os (s->data_statement.exp); - /* The output section gets CONTENTS, and usually ALLOC and - LOAD, but the latter two may be overridden by the script. */ + /* The output section gets CONTENTS, ALLOC and LOAD, but + these may be overridden by the script. */ flags = SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD; switch (os->sectype) { @@ -3478,7 +3606,11 @@ map_input_to_output_sections flags = SEC_HAS_CONTENTS; break; case noload_section: - flags = SEC_HAS_CONTENTS | SEC_NEVER_LOAD; + if (bfd_get_flavour (link_info.output_bfd) + == bfd_target_elf_flavour) + flags = SEC_NEVER_LOAD | SEC_ALLOC; + else + flags = SEC_NEVER_LOAD | SEC_HAS_CONTENTS; break; } if (os->bfd_section == NULL) @@ -3745,8 +3877,9 @@ strip_excluded_output_sections (void) asection *s; for (s = output_section->map_head.s; s != NULL; s = s->map_head.s) - if ((s->flags & SEC_LINKER_CREATED) != 0 - && (s->flags & SEC_EXCLUDE) == 0) + if ((s->flags & SEC_EXCLUDE) == 0 + && ((s->flags & SEC_LINKER_CREATED) != 0 + || link_info.emitrelocations)) { exclude = FALSE; break; @@ -3761,8 +3894,7 @@ strip_excluded_output_sections (void) { /* We don't set bfd_section to NULL since bfd_section of the removed output section statement may still be used. */ - if (!os->section_relative_symbol - && !os->update_dot_tree) + if (!os->update_dot) os->ignored = TRUE; output_section->flags |= SEC_EXCLUDE; bfd_section_list_remove (link_info.output_bfd, output_section); @@ -3834,12 +3966,12 @@ scan_for_self_assignment (const char * dst, etree_type * rhs) switch (rhs->type.node_class) { case etree_binary: - return scan_for_self_assignment (dst, rhs->binary.lhs) - || scan_for_self_assignment (dst, rhs->binary.rhs); + return (scan_for_self_assignment (dst, rhs->binary.lhs) + || scan_for_self_assignment (dst, rhs->binary.rhs)); case etree_trinary: - return scan_for_self_assignment (dst, rhs->trinary.lhs) - || scan_for_self_assignment (dst, rhs->trinary.rhs); + return (scan_for_self_assignment (dst, rhs->trinary.lhs) + || scan_for_self_assignment (dst, rhs->trinary.rhs)); case etree_assign: case etree_provided: @@ -3877,6 +4009,7 @@ print_assignment (lang_assignment_statement_type *assignment, bfd_boolean is_dot; bfd_boolean computation_is_valid = TRUE; etree_type *tree; + asection *osec; for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++) print_space (); @@ -3893,10 +4026,13 @@ print_assignment (lang_assignment_statement_type *assignment, is_dot = (dst[0] == '.' && dst[1] == 0); tree = assignment->exp->assign.src; - computation_is_valid = is_dot || (scan_for_self_assignment (dst, tree) == FALSE); + computation_is_valid = is_dot || !scan_for_self_assignment (dst, tree); } - exp_fold_tree (tree, output_section->bfd_section, &print_dot); + osec = output_section->bfd_section; + if (osec == NULL) + osec = bfd_abs_section_ptr; + exp_fold_tree (tree, osec, &print_dot); if (expld.result.valid_p) { bfd_vma value; @@ -3905,7 +4041,7 @@ print_assignment (lang_assignment_statement_type *assignment, { value = expld.result.value; - if (expld.result.section) + if (expld.result.section != NULL) value += expld.result.section->vma; minfo ("0x%V", value); @@ -3921,9 +4057,8 @@ print_assignment (lang_assignment_statement_type *assignment, if (h) { value = h->u.def.value; - - if (expld.result.section) - value += expld.result.section->vma; + value += h->u.def.section->output_section->vma; + value += h->u.def.section->output_offset; minfo ("[0x%V]", value); } @@ -4007,7 +4142,7 @@ print_all_symbols (asection *sec) return; *ud->map_symbol_def_tail = 0; - + /* Sort the symbols by address. */ entries = (struct bfd_link_hash_entry **) obstack_alloc (&map_obstack, ud->map_symbol_def_count * sizeof (*entries)); @@ -4422,11 +4557,11 @@ dprint_statement (lang_statement_union_type *s, int n) static void insert_pad (lang_statement_union_type **ptr, fill_type *fill, - unsigned int alignment_needed, + bfd_size_type alignment_needed, asection *output_section, bfd_vma dot) { - static fill_type zero_fill = { 1, { 0 } }; + static fill_type zero_fill; lang_statement_union_type *pad = NULL; if (ptr != &statement_list.head) @@ -4474,10 +4609,10 @@ size_input_section lang_input_section_type *is = &((*this_ptr)->input_section); asection *i = is->section; - if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag + if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS && (i->flags & SEC_EXCLUDE) == 0) { - unsigned int alignment_needed; + bfd_size_type alignment_needed; asection *o; /* Align this section first to the input sections requirement, @@ -4537,9 +4672,8 @@ sort_sections_by_lma (const void *arg1, const void *arg2) } #define IGNORE_SECTION(s) \ - ((s->flags & SEC_NEVER_LOAD) != 0 \ - || (s->flags & SEC_ALLOC) == 0 \ - || ((s->flags & SEC_THREAD_LOCAL) != 0 \ + ((s->flags & SEC_ALLOC) == 0 \ + || ((s->flags & SEC_THREAD_LOCAL) != 0 \ && (s->flags & SEC_LOAD) == 0)) /* Check to see if any allocated sections overlap with other allocated @@ -4550,13 +4684,13 @@ sort_sections_by_lma (const void *arg1, const void *arg2) static void lang_check_section_addresses (void) { - asection *s, *os; + asection *s, *p; asection **sections, **spp; unsigned int count; bfd_vma s_start; bfd_vma s_end; - bfd_vma os_start; - bfd_vma os_end; + bfd_vma p_start; + bfd_vma p_end; bfd_size_type amt; lang_memory_region_type *m; @@ -4571,8 +4705,7 @@ lang_check_section_addresses (void) for (s = link_info.output_bfd->sections; s != NULL; s = s->next) { /* Only consider loadable sections with real contents. */ - if ((s->flags & SEC_NEVER_LOAD) - || !(s->flags & SEC_LOAD) + if (!(s->flags & SEC_LOAD) || !(s->flags & SEC_ALLOC) || s->size == 0) continue; @@ -4589,24 +4722,29 @@ lang_check_section_addresses (void) spp = sections; s = *spp++; - s_start = bfd_section_lma (link_info.output_bfd, s); + s_start = s->lma; s_end = s_start + TO_ADDR (s->size) - 1; for (count--; count; count--) { /* We must check the sections' LMA addresses not their VMA addresses because overlay sections can have overlapping VMAs but they must have distinct LMAs. */ - os = s; - os_start = s_start; - os_end = s_end; + p = s; + p_start = s_start; + p_end = s_end; s = *spp++; - s_start = bfd_section_lma (link_info.output_bfd, s); + s_start = s->lma; s_end = s_start + TO_ADDR (s->size) - 1; - /* Look for an overlap. */ - if (s_end >= os_start && s_start <= os_end) + /* Look for an overlap. We have sorted sections by lma, so we + know that s_start >= p_start. Besides the obvious case of + overlap when the current section starts before the previous + one ends, we also must have overlap if the previous section + wraps around the address space. */ + if (s_start <= p_end + || p_end < p_start) einfo (_("%X%P: section %s loaded at [%V,%V] overlaps section %s loaded at [%V,%V]\n"), - s->name, s_start, s_end, os->name, os_start, os_end); + s->name, s_start, s_end, p->name, p_start, p_end); } free (sections); @@ -4667,16 +4805,17 @@ os_region_check (lang_output_section_statement_type *os, static bfd_vma lang_size_sections_1 - (lang_statement_union_type *s, + (lang_statement_union_type **prev, lang_output_section_statement_type *output_section_statement, - lang_statement_union_type **prev, fill_type *fill, bfd_vma dot, bfd_boolean *relax, bfd_boolean check_regions) { + lang_statement_union_type *s; + /* Size up the sections from their constituent parts. */ - for (; s != NULL; s = s->header.next) + for (s = *prev; s != NULL; s = s->header.next) { switch (s->header.type) { @@ -4685,8 +4824,12 @@ lang_size_sections_1 bfd_vma newdot, after; lang_output_section_statement_type *os; lang_memory_region_type *r; + int section_alignment = 0; os = &s->output_section_statement; + if (os->constraint == -1) + break; + /* FIXME: We shouldn't need to zero section vmas for ld -r here, in lang_insert_orphan, or in the default linker scripts. This is covering for coff backend linker bugs. See PR6945. */ @@ -4701,11 +4844,15 @@ lang_size_sections_1 exp_fold_tree (os->addr_tree, bfd_abs_section_ptr, &dot); if (expld.result.valid_p) - dot = expld.result.value + expld.result.section->vma; + { + dot = expld.result.value; + if (expld.result.section != NULL) + dot += expld.result.section->vma; + } else if (expld.phase != lang_mark_phase_enum) einfo (_("%F%S: non constant or forward reference" " address expression for section %s\n"), - os->name); + os->addr_tree, os->name); } if (os->bfd_section == NULL) @@ -4747,8 +4894,6 @@ lang_size_sections_1 } else { - int align; - if (os->addr_tree == NULL) { /* No address specified for this section, get one @@ -4799,16 +4944,16 @@ lang_size_sections_1 } newdot = os->region->current; - align = os->bfd_section->alignment_power; + section_alignment = os->bfd_section->alignment_power; } else - align = os->section_alignment; + section_alignment = os->section_alignment; /* Align to what the section needs. */ - if (align > 0) + if (section_alignment > 0) { bfd_vma savedot = newdot; - newdot = align_power (newdot, align); + newdot = align_power (newdot, section_alignment); if (newdot != savedot && (config.warn_section_align @@ -4824,7 +4969,7 @@ lang_size_sections_1 os->bfd_section->output_offset = 0; } - lang_size_sections_1 (os->children.head, os, &os->children.head, + lang_size_sections_1 (&os->children.head, os, os->fill, newdot, relax, check_regions); os->processed_vma = TRUE; @@ -4864,8 +5009,8 @@ lang_size_sections_1 { bfd_vma lma = os->lma_region->current; - if (os->section_alignment != -1) - lma = align_power (lma, os->section_alignment); + if (section_alignment > 0) + lma = align_power (lma, section_alignment); os->bfd_section->lma = lma; } else if (r->last_os != NULL @@ -4906,8 +5051,8 @@ lang_size_sections_1 else lma = dot + last->lma - last->vma; - if (os->section_alignment != -1) - lma = align_power (lma, os->section_alignment); + if (section_alignment > 0) + lma = align_power (lma, section_alignment); os->bfd_section->lma = lma; } } @@ -4949,14 +5094,9 @@ lang_size_sections_1 /* Update dot in the region ? We only do this if the section is going to be allocated, since unallocated sections do not contribute to the region's - overall size in memory. - - If the SEC_NEVER_LOAD bit is not set, it will affect the - addresses of sections after it. We have to update - dot. */ + overall size in memory. */ if (os->region != NULL - && ((os->bfd_section->flags & SEC_NEVER_LOAD) == 0 - || (os->bfd_section->flags & (SEC_ALLOC | SEC_LOAD)))) + && (os->bfd_section->flags & (SEC_ALLOC | SEC_LOAD))) { os->region->current = dot; @@ -4980,9 +5120,8 @@ lang_size_sections_1 break; case lang_constructors_statement_enum: - dot = lang_size_sections_1 (constructor_list.head, + dot = lang_size_sections_1 (&constructor_list.head, output_section_statement, - &s->wild_statement.children.head, fill, dot, relax, check_regions); break; @@ -5039,9 +5178,8 @@ lang_size_sections_1 break; case lang_wild_statement_enum: - dot = lang_size_sections_1 (s->wild_statement.children.head, + dot = lang_size_sections_1 (&s->wild_statement.children.head, output_section_statement, - &s->wild_statement.children.head, fill, dot, relax, check_regions); break; @@ -5058,7 +5196,7 @@ lang_size_sections_1 { asection *i; - i = (*prev)->input_section.section; + i = s->input_section.section; if (relax) { bfd_boolean again; @@ -5114,12 +5252,12 @@ lang_size_sections_1 } expld.dataseg.relro = exp_dataseg_relro_none; - /* This symbol is relative to this section. */ + /* This symbol may be relative to this section. */ if ((tree->type.node_class == etree_provided || tree->type.node_class == etree_assign) && (tree->assign.dst [0] != '.' || tree->assign.dst [1] != '\0')) - output_section_statement->section_relative_symbol = 1; + output_section_statement->update_dot = 1; if (!output_section_statement->ignored) { @@ -5144,8 +5282,11 @@ lang_size_sections_1 /* If dot is advanced, this implies that the section should have space allocated to it, unless the user has explicitly stated that the section - should never be loaded. */ - if (!(output_section_statement->flags & SEC_NEVER_LOAD)) + should not be allocated. */ + if (output_section_statement->sectype != noalloc_section + && (output_section_statement->sectype != noload_section + || (bfd_get_flavour (link_info.output_bfd) + == bfd_target_elf_flavour))) output_section_statement->bfd_section->flags |= SEC_ALLOC; } dot = newdot; @@ -5171,9 +5312,8 @@ lang_size_sections_1 break; case lang_group_statement_enum: - dot = lang_size_sections_1 (s->group_statement.children.head, + dot = lang_size_sections_1 (&s->group_statement.children.head, output_section_statement, - &s->group_statement.children.head, fill, dot, relax, check_regions); break; @@ -5239,8 +5379,8 @@ void one_lang_size_sections_pass (bfd_boolean *relax, bfd_boolean check_regions) { lang_statement_iteration++; - lang_size_sections_1 (statement_list.head, abs_output_section, - &statement_list.head, 0, 0, relax, check_regions); + lang_size_sections_1 (&statement_list.head, abs_output_section, + 0, 0, relax, check_regions); } void @@ -5324,18 +5464,25 @@ lang_size_sections (bfd_boolean *relax, bfd_boolean check_regions) lang_reset_memory_regions (); one_lang_size_sections_pass (relax, check_regions); } + else + expld.dataseg.phase = exp_dataseg_done; } - - expld.phase = lang_final_phase_enum; + else + expld.dataseg.phase = exp_dataseg_done; } +static lang_output_section_statement_type *current_section; +static lang_assignment_statement_type *current_assign; +static bfd_boolean prefer_next_section; + /* Worker function for lang_do_assignments. Recursiveness goes here. */ static bfd_vma lang_do_assignments_1 (lang_statement_union_type *s, lang_output_section_statement_type *current_os, fill_type *fill, - bfd_vma dot) + bfd_vma dot, + bfd_boolean *found_end) { for (; s != NULL; s = s->header.next) { @@ -5343,7 +5490,7 @@ lang_do_assignments_1 (lang_statement_union_type *s, { case lang_constructors_statement_enum: dot = lang_do_assignments_1 (constructor_list.head, - current_os, fill, dot); + current_os, fill, dot, found_end); break; case lang_output_section_statement_enum: @@ -5351,11 +5498,18 @@ lang_do_assignments_1 (lang_statement_union_type *s, lang_output_section_statement_type *os; os = &(s->output_section_statement); + os->after_end = *found_end; if (os->bfd_section != NULL && !os->ignored) { + if ((os->bfd_section->flags & SEC_ALLOC) != 0) + { + current_section = os; + prefer_next_section = FALSE; + } dot = os->bfd_section->vma; - lang_do_assignments_1 (os->children.head, os, os->fill, dot); + lang_do_assignments_1 (os->children.head, + os, os->fill, dot, found_end); /* .tbss sections effectively have zero size. */ if ((os->bfd_section->flags & SEC_HAS_CONTENTS) != 0 @@ -5372,7 +5526,7 @@ lang_do_assignments_1 (lang_statement_union_type *s, case lang_wild_statement_enum: dot = lang_do_assignments_1 (s->wild_statement.children.head, - current_os, fill, dot); + current_os, fill, dot, found_end); break; case lang_object_symbols_statement_enum: @@ -5383,8 +5537,11 @@ lang_do_assignments_1 (lang_statement_union_type *s, case lang_data_statement_enum: exp_fold_tree (s->data_statement.exp, bfd_abs_section_ptr, &dot); if (expld.result.valid_p) - s->data_statement.value = (expld.result.value - + expld.result.section->vma); + { + s->data_statement.value = expld.result.value; + if (expld.result.section != NULL) + s->data_statement.value += expld.result.section->vma; + } else einfo (_("%F%P: invalid data statement\n")); { @@ -5440,6 +5597,19 @@ lang_do_assignments_1 (lang_statement_union_type *s, break; case lang_assignment_statement_enum: + current_assign = &s->assignment_statement; + if (current_assign->exp->type.node_class != etree_assert) + { + const char *p = current_assign->exp->assign.dst; + + if (current_os == abs_output_section && p[0] == '.' && p[1] == 0) + prefer_next_section = TRUE; + + while (*p == '_') + ++p; + if (strcmp (p, "end") == 0) + *found_end = TRUE; + } exp_fold_tree (s->assignment_statement.exp, current_os->bfd_section, &dot); @@ -5451,7 +5621,7 @@ lang_do_assignments_1 (lang_statement_union_type *s, case lang_group_statement_enum: dot = lang_do_assignments_1 (s->group_statement.children.head, - current_os, fill, dot); + current_os, fill, dot, found_end); break; case lang_insert_statement_enum: @@ -5469,10 +5639,91 @@ lang_do_assignments_1 (lang_statement_union_type *s, } void -lang_do_assignments (void) +lang_do_assignments (lang_phase_type phase) { + bfd_boolean found_end = FALSE; + + current_section = NULL; + prefer_next_section = FALSE; + expld.phase = phase; lang_statement_iteration++; - lang_do_assignments_1 (statement_list.head, abs_output_section, NULL, 0); + lang_do_assignments_1 (statement_list.head, + abs_output_section, NULL, 0, &found_end); +} + +/* For an assignment statement outside of an output section statement, + choose the best of neighbouring output sections to use for values + of "dot". */ + +asection * +section_for_dot (void) +{ + asection *s; + + /* Assignments belong to the previous output section, unless there + has been an assignment to "dot", in which case following + assignments belong to the next output section. (The assumption + is that an assignment to "dot" is setting up the address for the + next output section.) Except that past the assignment to "_end" + we always associate with the previous section. This exception is + for targets like SH that define an alloc .stack or other + weirdness after non-alloc sections. */ + if (current_section == NULL || prefer_next_section) + { + lang_statement_union_type *stmt; + lang_output_section_statement_type *os; + + for (stmt = (lang_statement_union_type *) current_assign; + stmt != NULL; + stmt = stmt->header.next) + if (stmt->header.type == lang_output_section_statement_enum) + break; + + os = &stmt->output_section_statement; + while (os != NULL + && !os->after_end + && (os->bfd_section == NULL + || (os->bfd_section->flags & SEC_EXCLUDE) != 0 + || bfd_section_removed_from_list (link_info.output_bfd, + os->bfd_section))) + os = os->next; + + if (current_section == NULL || os == NULL || !os->after_end) + { + if (os != NULL) + s = os->bfd_section; + else + s = link_info.output_bfd->section_last; + while (s != NULL + && ((s->flags & SEC_ALLOC) == 0 + || (s->flags & SEC_THREAD_LOCAL) != 0)) + s = s->prev; + if (s != NULL) + return s; + + return bfd_abs_section_ptr; + } + } + + s = current_section->bfd_section; + + /* The section may have been stripped. */ + while (s != NULL + && ((s->flags & SEC_EXCLUDE) != 0 + || (s->flags & SEC_ALLOC) == 0 + || (s->flags & SEC_THREAD_LOCAL) != 0 + || bfd_section_removed_from_list (link_info.output_bfd, s))) + s = s->prev; + if (s == NULL) + s = link_info.output_bfd->sections; + while (s != NULL + && ((s->flags & SEC_ALLOC) == 0 + || (s->flags & SEC_THREAD_LOCAL) != 0)) + s = s->next; + if (s != NULL) + return s; + + return bfd_abs_section_ptr; } /* Fix any .startof. or .sizeof. symbols. When the assemblers see the @@ -5504,8 +5755,8 @@ lang_set_startof (void) if (h != NULL && h->type == bfd_link_hash_undefined) { h->type = bfd_link_hash_defined; - h->u.def.value = bfd_get_section_vma (link_info.output_bfd, s); - h->u.def.section = bfd_abs_section_ptr; + h->u.def.value = 0; + h->u.def.section = s; } sprintf (buf, ".sizeof.%s", secname); @@ -5536,8 +5787,7 @@ lang_end (void) /* Force the user to specify a root when generating a relocatable with --gc-sections. */ if (link_info.gc_sections && link_info.relocatable - && (entry_symbol.name == NULL - && ldlang_undef_chain_list_head == NULL)) + && !(entry_from_cmdline || undef_from_cmdline)) einfo (_("%P%F: gc-sections requires either an entry or " "an undefined symbol\n")); @@ -5633,6 +5883,11 @@ lang_check (void) for (file = file_chain.head; file != NULL; file = file->input_statement.next) { +#ifdef ENABLE_PLUGINS + /* Don't check format of files claimed by plugin. */ + if (file->input_statement.flags.claimed) + continue; +#endif /* ENABLE_PLUGINS */ input_bfd = file->input_statement.the_bfd; compatible = bfd_arch_get_compatible (input_bfd, link_info.output_bfd, @@ -5833,7 +6088,7 @@ lang_place_orphans (void) /* This section of the file is not attached, root around for a sensible place for it to go. */ - if (file->just_syms_flag) + if (file->flags.just_syms) bfd_link_just_syms (file->the_bfd, s, &link_info); else if ((s->flags & SEC_EXCLUDE) != 0) s->output_section = bfd_abs_section_ptr; @@ -5850,7 +6105,7 @@ lang_place_orphans (void) = lang_output_section_statement_lookup (".bss", 0, TRUE); lang_add_section (&default_common_section->children, s, - default_common_section); + NULL, default_common_section); } } else @@ -5868,7 +6123,11 @@ lang_place_orphans (void) os = lang_output_section_statement_lookup (name, constraint, TRUE); - lang_add_section (&os->children, s, os); + if (os->addr_tree == NULL + && (link_info.relocatable + || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0)) + os->addr_tree = exp_intop (0); + lang_add_section (&os->children, s, NULL, os); } } } @@ -5983,8 +6242,6 @@ lang_add_output (const char *name, int from_script) } } -static lang_output_section_statement_type *current_section; - static int topower (int x) { @@ -6089,6 +6346,7 @@ static void gc_section_callback (lang_wild_statement_type *ptr, struct wildcard_list *sec ATTRIBUTE_UNUSED, asection *section, + struct flag_info *sflag_info ATTRIBUTE_UNUSED, lang_input_statement_type *file ATTRIBUTE_UNUSED, void *data ATTRIBUTE_UNUSED) { @@ -6140,6 +6398,10 @@ lang_gc_sections (void) LANG_FOR_EACH_INPUT_STATEMENT (f) { asection *sec; +#ifdef ENABLE_PLUGINS + if (f->flags.claimed) + continue; +#endif for (sec = f->the_bfd->sections; sec != NULL; sec = sec->next) if ((sec->flags & SEC_DEBUGGING) == 0) sec->flags &= ~SEC_EXCLUDE; @@ -6156,6 +6418,7 @@ static void find_relro_section_callback (lang_wild_statement_type *ptr ATTRIBUTE_UNUSED, struct wildcard_list *sec ATTRIBUTE_UNUSED, asection *section, + struct flag_info *sflag_info ATTRIBUTE_UNUSED, lang_input_statement_type *file ATTRIBUTE_UNUSED, void *data) { @@ -6254,7 +6517,7 @@ lang_relax_sections (bfd_boolean need_layout) /* Do all the assignments with our current guesses as to section sizes. */ - lang_do_assignments (); + lang_do_assignments (lang_assigning_phase_enum); /* We must do this after lang_do_assignments, because it uses size. */ @@ -6275,12 +6538,78 @@ lang_relax_sections (bfd_boolean need_layout) if (need_layout) { /* Final extra sizing to report errors. */ - lang_do_assignments (); + lang_do_assignments (lang_assigning_phase_enum); lang_reset_memory_regions (); lang_size_sections (NULL, TRUE); } } +#ifdef ENABLE_PLUGINS +/* Find the insert point for the plugin's replacement files. We + place them after the first claimed real object file, or if the + first claimed object is an archive member, after the last real + object file immediately preceding the archive. In the event + no objects have been claimed at all, we return the first dummy + object file on the list as the insert point; that works, but + the callee must be careful when relinking the file_chain as it + is not actually on that chain, only the statement_list and the + input_file list; in that case, the replacement files must be + inserted at the head of the file_chain. */ + +static lang_input_statement_type * +find_replacements_insert_point (void) +{ + lang_input_statement_type *claim1, *lastobject; + lastobject = &input_file_chain.head->input_statement; + for (claim1 = &file_chain.head->input_statement; + claim1 != NULL; + claim1 = &claim1->next->input_statement) + { + if (claim1->flags.claimed) + return claim1->flags.claim_archive ? lastobject : claim1; + /* Update lastobject if this is a real object file. */ + if (claim1->the_bfd && (claim1->the_bfd->my_archive == NULL)) + lastobject = claim1; + } + /* No files were claimed by the plugin. Choose the last object + file found on the list (maybe the first, dummy entry) as the + insert point. */ + return lastobject; +} + +/* Insert SRCLIST into DESTLIST after given element by chaining + on FIELD as the next-pointer. (Counterintuitively does not need + a pointer to the actual after-node itself, just its chain field.) */ + +static void +lang_list_insert_after (lang_statement_list_type *destlist, + lang_statement_list_type *srclist, + lang_statement_union_type **field) +{ + *(srclist->tail) = *field; + *field = srclist->head; + if (destlist->tail == field) + destlist->tail = srclist->tail; +} + +/* Detach new nodes added to DESTLIST since the time ORIGLIST + was taken as a copy of it and leave them in ORIGLIST. */ + +static void +lang_list_remove_tail (lang_statement_list_type *destlist, + lang_statement_list_type *origlist) +{ + union lang_statement_union **savetail; + /* Check that ORIGLIST really is an earlier state of DESTLIST. */ + ASSERT (origlist->head == destlist->head); + savetail = origlist->tail; + origlist->head = *(savetail); + origlist->tail = destlist->tail; + destlist->tail = savetail; + *savetail = NULL; +} +#endif /* ENABLE_PLUGINS */ + void lang_process (void) { @@ -6304,7 +6633,65 @@ lang_process (void) /* Create a bfd for each input file. */ current_target = default_target; - open_input_bfds (statement_list.head, FALSE); + open_input_bfds (statement_list.head, OPEN_BFD_NORMAL); + +#ifdef ENABLE_PLUGINS + if (plugin_active_plugins_p ()) + { + lang_statement_list_type added; + lang_statement_list_type files, inputfiles; + + /* Now all files are read, let the plugin(s) decide if there + are any more to be added to the link before we call the + emulation's after_open hook. We create a private list of + input statements for this purpose, which we will eventually + insert into the global statment list after the first claimed + file. */ + added = *stat_ptr; + /* We need to manipulate all three chains in synchrony. */ + files = file_chain; + inputfiles = input_file_chain; + if (plugin_call_all_symbols_read ()) + einfo (_("%P%F: %s: plugin reported error after all symbols read\n"), + plugin_error_plugin ()); + /* Open any newly added files, updating the file chains. */ + link_info.loading_lto_outputs = TRUE; + open_input_bfds (*added.tail, OPEN_BFD_NORMAL); + /* Restore the global list pointer now they have all been added. */ + lang_list_remove_tail (stat_ptr, &added); + /* And detach the fresh ends of the file lists. */ + lang_list_remove_tail (&file_chain, &files); + lang_list_remove_tail (&input_file_chain, &inputfiles); + /* Were any new files added? */ + if (added.head != NULL) + { + /* If so, we will insert them into the statement list immediately + after the first input file that was claimed by the plugin. */ + plugin_insert = find_replacements_insert_point (); + /* If a plugin adds input files without having claimed any, we + don't really have a good idea where to place them. Just putting + them at the start or end of the list is liable to leave them + outside the crtbegin...crtend range. */ + ASSERT (plugin_insert != NULL); + /* Splice the new statement list into the old one. */ + lang_list_insert_after (stat_ptr, &added, + &plugin_insert->header.next); + /* Likewise for the file chains. */ + lang_list_insert_after (&input_file_chain, &inputfiles, + &plugin_insert->next_real_file); + /* We must be careful when relinking file_chain; we may need to + insert the new files at the head of the list if the insert + point chosen is the dummy first input file. */ + if (plugin_insert->filename) + lang_list_insert_after (&file_chain, &files, &plugin_insert->next); + else + lang_list_insert_after (&file_chain, &files, &file_chain.head); + + /* Rescan archives in case new undefined symbols have appeared. */ + open_input_bfds (statement_list.head, OPEN_BFD_RESCAN); + } + } +#endif /* ENABLE_PLUGINS */ link_info.gc_sym_list = &entry_symbol; if (entry_symbol.name == NULL) @@ -6329,6 +6716,11 @@ lang_process (void) files. */ ldctor_build_sets (); + /* PR 13683: We must rerun the assignments prior to running garbage + collection in order to make sure that all symbol aliases are resolved. */ + lang_do_assignments (lang_mark_phase_enum); + expld.phase = lang_first_phase_enum; + /* Remove unreferenced sections if asked to. */ lang_gc_sections (); @@ -6340,6 +6732,7 @@ lang_process (void) /* Run through the contours of the script and attach input sections to the correct output sections. */ + lang_statement_iteration++; map_input_to_output_sections (statement_list.head, NULL, NULL); process_insert_statements (); @@ -6393,8 +6786,7 @@ lang_process (void) /* Do all the assignments, now that we know the final resting places of all the symbols. */ - - lang_do_assignments (); + lang_do_assignments (lang_final_phase_enum); ldemul_finish (); @@ -6438,10 +6830,12 @@ lang_add_wild (struct wildcard_spec *filespec, new_stmt = new_stat (lang_wild_statement, stat_ptr); new_stmt->filename = NULL; new_stmt->filenames_sorted = FALSE; + new_stmt->section_flag_list = NULL; if (filespec != NULL) { new_stmt->filename = filespec->name; new_stmt->filenames_sorted = filespec->sorted == by_name; + new_stmt->section_flag_list = filespec->section_flag_list; } new_stmt->section_list = section_list; new_stmt->keep_sections = keep_sections; @@ -6577,15 +6971,13 @@ lang_add_attribute (enum statement_enum attribute) void lang_startup (const char *name) { - if (startup_file != NULL) + if (first_file->filename != NULL) { einfo (_("%P%F: multiple STARTUP files\n")); } first_file->filename = name; first_file->local_sym_name = name; - first_file->real = TRUE; - - startup_file = name; + first_file->flags.real = TRUE; } void @@ -6627,7 +7019,8 @@ lang_get_regions (lang_memory_region_type **region, *region = lang_memory_region_lookup (memspec, FALSE); if (have_lma && lma_memspec != 0) - einfo (_("%X%P:%S: section has both a load address and a load region\n")); + einfo (_("%X%P:%S: section has both a load address and a load region\n"), + NULL); } void @@ -6641,82 +7034,21 @@ lang_leave_output_section_statement (fill_type *fill, const char *memspec, current_section->load_base != NULL, current_section->addr_tree != NULL); - /* If this section has no load region or base, but has the same + /* If this section has no load region or base, but uses the same region as the previous section, then propagate the previous section's load region. */ - if (!current_section->lma_region && !current_section->load_base + if (current_section->lma_region == NULL + && current_section->load_base == NULL + && current_section->addr_tree == NULL && current_section->region == current_section->prev->region) current_section->lma_region = current_section->prev->lma_region; - + current_section->fill = fill; current_section->phdrs = phdrs; pop_stat_ptr (); } -/* Create an absolute symbol with the given name with the value of the - address of first byte of the section named. - - If the symbol already exists, then do nothing. */ - -void -lang_abs_symbol_at_beginning_of (const char *secname, const char *name) -{ - struct bfd_link_hash_entry *h; - - h = bfd_link_hash_lookup (link_info.hash, name, TRUE, TRUE, TRUE); - if (h == NULL) - einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); - - if (h->type == bfd_link_hash_new - || h->type == bfd_link_hash_undefined) - { - asection *sec; - - h->type = bfd_link_hash_defined; - - sec = bfd_get_section_by_name (link_info.output_bfd, secname); - if (sec == NULL) - h->u.def.value = 0; - else - h->u.def.value = bfd_get_section_vma (link_info.output_bfd, sec); - - h->u.def.section = bfd_abs_section_ptr; - } -} - -/* Create an absolute symbol with the given name with the value of the - address of the first byte after the end of the section named. - - If the symbol already exists, then do nothing. */ - -void -lang_abs_symbol_at_end_of (const char *secname, const char *name) -{ - struct bfd_link_hash_entry *h; - - h = bfd_link_hash_lookup (link_info.hash, name, TRUE, TRUE, TRUE); - if (h == NULL) - einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); - - if (h->type == bfd_link_hash_new - || h->type == bfd_link_hash_undefined) - { - asection *sec; - - h->type = bfd_link_hash_defined; - - sec = bfd_get_section_by_name (link_info.output_bfd, secname); - if (sec == NULL) - h->u.def.value = 0; - else - h->u.def.value = (bfd_get_section_vma (link_info.output_bfd, sec) - + TO_ADDR (sec->size)); - - h->u.def.section = bfd_abs_section_ptr; - } -} - void lang_statement_append (lang_statement_list_type *list, lang_statement_union_type *element, @@ -6804,7 +7136,7 @@ lang_new_phdr (const char *name, n->phdrs = phdrs; n->at = at; n->flags = flags; - + hdrs = n->type == 1 && (phdrs || filehdr); for (pp = &lang_phdr_list; *pp != NULL; pp = &(*pp)->next) @@ -6812,7 +7144,8 @@ lang_new_phdr (const char *name, && (*pp)->type == 1 && !((*pp)->filehdr || (*pp)->phdrs)) { - einfo (_("%X%P:%S: PHDRS and FILEHDR are not supported when prior PT_LOAD headers lack them\n")); + einfo (_("%X%P:%S: PHDRS and FILEHDR are not supported" + " when prior PT_LOAD headers lack them\n"), NULL); hdrs = FALSE; } @@ -7101,8 +7434,11 @@ lang_leave_overlay (etree_type *lma_expr, /* After setting the size of the last section, set '.' to end of the overlay region. */ if (overlay_list != NULL) - overlay_list->os->update_dot_tree - = exp_assop ('=', ".", exp_binop ('+', overlay_vma, overlay_max)); + { + overlay_list->os->update_dot = 1; + overlay_list->os->update_dot_tree + = exp_assign (".", exp_binop ('+', overlay_vma, overlay_max)); + } l = overlay_list; while (l != NULL) @@ -7152,10 +7488,6 @@ lang_leave_overlay (etree_type *lma_expr, /* Version handling. This is only useful for ELF. */ -/* This global variable holds the version tree that we build. */ - -struct bfd_elf_version_tree *lang_elf_version_info; - /* If PREV is NULL, return first version pattern matching particular symbol. If PREV is non-NULL, return first version pattern matching particular symbol after PREV (previously returned by lang_vers_match). */ @@ -7165,19 +7497,29 @@ lang_vers_match (struct bfd_elf_version_expr_head *head, struct bfd_elf_version_expr *prev, const char *sym) { + const char *c_sym; const char *cxx_sym = sym; const char *java_sym = sym; struct bfd_elf_version_expr *expr = NULL; + enum demangling_styles curr_style; + + curr_style = CURRENT_DEMANGLING_STYLE; + cplus_demangle_set_style (no_demangling); + c_sym = bfd_demangle (link_info.output_bfd, sym, DMGL_NO_OPTS); + if (!c_sym) + c_sym = sym; + cplus_demangle_set_style (curr_style); if (head->mask & BFD_ELF_VERSION_CXX_TYPE) { - cxx_sym = cplus_demangle (sym, DMGL_PARAMS | DMGL_ANSI); + cxx_sym = bfd_demangle (link_info.output_bfd, sym, + DMGL_PARAMS | DMGL_ANSI); if (!cxx_sym) cxx_sym = sym; } if (head->mask & BFD_ELF_VERSION_JAVA_TYPE) { - java_sym = cplus_demangle (sym, DMGL_JAVA); + java_sym = bfd_demangle (link_info.output_bfd, sym, DMGL_JAVA); if (!java_sym) java_sym = sym; } @@ -7191,10 +7533,10 @@ lang_vers_match (struct bfd_elf_version_expr_head *head, case 0: if (head->mask & BFD_ELF_VERSION_C_TYPE) { - e.pattern = sym; + e.pattern = c_sym; expr = (struct bfd_elf_version_expr *) htab_find ((htab_t) head->htab, &e); - while (expr && strcmp (expr->pattern, sym) == 0) + while (expr && strcmp (expr->pattern, c_sym) == 0) if (expr->mask == BFD_ELF_VERSION_C_TYPE) goto out_ret; else @@ -7252,12 +7594,14 @@ lang_vers_match (struct bfd_elf_version_expr_head *head, else if (expr->mask == BFD_ELF_VERSION_CXX_TYPE) s = cxx_sym; else - s = sym; + s = c_sym; if (fnmatch (expr->pattern, s, 0) == 0) break; } out_ret: + if (c_sym != sym) + free ((char *) c_sym); if (cxx_sym != sym) free ((char *) cxx_sym); if (java_sym != sym) @@ -7485,8 +7829,8 @@ lang_register_vers_node (const char *name, if (name == NULL) name = ""; - if ((name[0] == '\0' && lang_elf_version_info != NULL) - || (lang_elf_version_info && lang_elf_version_info->name[0] == '\0')) + if (link_info.version_info != NULL + && (name[0] == '\0' || link_info.version_info->name[0] == '\0')) { einfo (_("%X%P: anonymous version tag cannot be combined" " with other version tags\n")); @@ -7495,7 +7839,7 @@ lang_register_vers_node (const char *name, } /* Make sure this node has a unique name. */ - for (t = lang_elf_version_info; t != NULL; t = t->next) + for (t = link_info.version_info; t != NULL; t = t->next) if (strcmp (t->name, name) == 0) einfo (_("%X%P: duplicate version tag `%s'\n"), name); @@ -7507,7 +7851,7 @@ lang_register_vers_node (const char *name, for (e1 = version->globals.list; e1 != NULL; e1 = e1->next) { - for (t = lang_elf_version_info; t != NULL; t = t->next) + for (t = link_info.version_info; t != NULL; t = t->next) { struct bfd_elf_version_expr *e2; @@ -7534,7 +7878,7 @@ lang_register_vers_node (const char *name, for (e1 = version->locals.list; e1 != NULL; e1 = e1->next) { - for (t = lang_elf_version_info; t != NULL; t = t->next) + for (t = link_info.version_info; t != NULL; t = t->next) { struct bfd_elf_version_expr *e2; @@ -7570,7 +7914,7 @@ lang_register_vers_node (const char *name, else version->vernum = 0; - for (pp = &lang_elf_version_info; *pp != NULL; pp = &(*pp)->next) + for (pp = &link_info.version_info; *pp != NULL; pp = &(*pp)->next) ; *pp = version; } @@ -7586,7 +7930,7 @@ lang_add_vers_depend (struct bfd_elf_version_deps *list, const char *name) ret = (struct bfd_elf_version_deps *) xmalloc (sizeof *ret); ret->next = list; - for (t = lang_elf_version_info; t != NULL; t = t->next) + for (t = link_info.version_info; t != NULL; t = t->next) { if (strcmp (t->name, name) == 0) { @@ -7597,6 +7941,7 @@ lang_add_vers_depend (struct bfd_elf_version_deps *list, const char *name) einfo (_("%X%P: unable to find version dependency `%s'\n"), name); + ret->version_needed = NULL; return ret; } @@ -7717,3 +8062,32 @@ lang_append_dynamic_list_cpp_new (void) lang_append_dynamic_list (dynamic); } + +/* Scan a space and/or comma separated string of features. */ + +void +lang_ld_feature (char *str) +{ + char *p, *q; + + p = str; + while (*p) + { + char sep; + while (*p == ',' || ISSPACE (*p)) + ++p; + if (!*p) + break; + q = p + 1; + while (*q && *q != ',' && !ISSPACE (*q)) + ++q; + sep = *q; + *q = 0; + if (strcasecmp (p, "SANE_EXPR") == 0) + config.sane_expr = TRUE; + else + einfo (_("%X%P: unknown feature `%s'\n"), p); + *q = sep; + p = q; + } +}