diff options
Diffstat (limited to 'contrib/binutils/ld/ldlang.c')
| -rw-r--r-- | contrib/binutils/ld/ldlang.c | 5470 |
1 files changed, 0 insertions, 5470 deletions
diff --git a/contrib/binutils/ld/ldlang.c b/contrib/binutils/ld/ldlang.c deleted file mode 100644 index 0c086014e2a0..000000000000 --- a/contrib/binutils/ld/ldlang.c +++ /dev/null @@ -1,5470 +0,0 @@ -/* Linker command language support. - Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, - 2001, 2002, 2003, 2004 - Free Software Foundation, Inc. - - This file is part of GLD, the Gnu Linker. - - GLD is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - GLD is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with GLD; see the file COPYING. If not, write to the Free - Software Foundation, 59 Temple Place - Suite 330, Boston, MA - 02111-1307, USA. */ - -#include "bfd.h" -#include "sysdep.h" -#include "libiberty.h" -#include "safe-ctype.h" -#include "obstack.h" -#include "bfdlink.h" - -#include "ld.h" -#include "ldmain.h" -#include "ldexp.h" -#include "ldlang.h" -#include <ldgram.h> -#include "ldlex.h" -#include "ldmisc.h" -#include "ldctor.h" -#include "ldfile.h" -#include "ldemul.h" -#include "fnmatch.h" -#include "demangle.h" -#include "hashtab.h" - -#ifndef offsetof -#define offsetof(TYPE, MEMBER) ((size_t) & (((TYPE*) 0)->MEMBER)) -#endif - -/* Locals variables. */ -static struct obstack stat_obstack; - -#define obstack_chunk_alloc xmalloc -#define obstack_chunk_free free -static const char *startup_file; -static lang_statement_list_type input_file_chain; -static bfd_boolean placed_commons = FALSE; -static lang_output_section_statement_type *default_common_section; -static bfd_boolean map_option_f; -static bfd_vma print_dot; -static lang_input_statement_type *first_file; -static const char *current_target; -static const char *output_target; -static lang_statement_list_type statement_list; -static struct lang_phdr *lang_phdr_list; -static struct bfd_hash_table lang_definedness_table; - -/* Forward declarations. */ -static void exp_init_os (etree_type *); -static bfd_boolean wildcardp (const char *); -static lang_input_statement_type *lookup_name (const char *); -static bfd_boolean load_symbols (lang_input_statement_type *, - lang_statement_list_type *); -static struct bfd_hash_entry *lang_definedness_newfunc - (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); -static void insert_undefined (const char *); -static void print_statement (lang_statement_union_type *, - lang_output_section_statement_type *); -static void print_statement_list (lang_statement_union_type *, - lang_output_section_statement_type *); -static void print_statements (void); -static bfd_boolean lang_one_common (struct bfd_link_hash_entry *, void *); -static void lang_record_phdrs (void); -static void lang_do_version_exports_section (void); - -typedef void (*callback_t) (lang_wild_statement_type *, struct wildcard_list *, - asection *, lang_input_statement_type *, void *); - -/* Exported variables. */ -lang_output_section_statement_type *abs_output_section; -lang_statement_list_type lang_output_section_statement; -lang_statement_list_type *stat_ptr = &statement_list; -lang_statement_list_type file_chain = { NULL, NULL }; -struct bfd_sym_chain entry_symbol = { NULL, NULL }; -const char *entry_section = ".text"; -bfd_boolean entry_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_nocrossrefs *nocrossref_list; -struct unique_sections *unique_section_list; -static bfd_boolean ldlang_sysrooted_script = FALSE; -int lang_statement_iteration = 0; - -etree_type *base; /* Relocation base - or null */ - -#define new_stat(x, y) \ - (x##_type *) new_statement (x##_enum, sizeof (x##_type), y) - -#define outside_section_address(q) \ - ((q)->output_offset + (q)->output_section->vma) - -#define outside_symbol_address(q) \ - ((q)->value + outside_section_address (q->section)) - -#define SECTION_NAME_MAP_LENGTH (16) - -void * -stat_alloc (size_t size) -{ - return obstack_alloc (&stat_obstack, size); -} - -bfd_boolean -unique_section_p (const char *secnam) -{ - struct unique_sections *unam; - - for (unam = unique_section_list; unam; unam = unam->next) - if (wildcardp (unam->name) - ? fnmatch (unam->name, secnam, 0) == 0 - : strcmp (unam->name, secnam) == 0) - { - return TRUE; - } - - return FALSE; -} - -/* Generic traversal routines for finding matching sections. */ - -static void -walk_wild_section (lang_wild_statement_type *ptr, - lang_input_statement_type *file, - callback_t callback, - void *data) -{ - asection *s; - - if (file->just_syms_flag) - return; - - for (s = file->the_bfd->sections; s != NULL; s = s->next) - { - struct wildcard_list *sec; - - sec = ptr->section_list; - if (sec == NULL) - (*callback) (ptr, sec, s, file, data); - - while (sec != NULL) - { - bfd_boolean skip = FALSE; - struct name_list *list_tmp; - - /* Don't process sections from files which were - excluded. */ - for (list_tmp = sec->spec.exclude_name_list; - list_tmp; - list_tmp = list_tmp->next) - { - if (wildcardp (list_tmp->name)) - skip = fnmatch (list_tmp->name, file->filename, 0) == 0; - else - skip = strcmp (list_tmp->name, file->filename) == 0; - - /* If this file is part of an archive, and the archive is - excluded, exclude this file. */ - if (! skip && file->the_bfd != NULL - && file->the_bfd->my_archive != NULL - && file->the_bfd->my_archive->filename != NULL) - { - if (wildcardp (list_tmp->name)) - skip = fnmatch (list_tmp->name, - file->the_bfd->my_archive->filename, - 0) == 0; - else - skip = strcmp (list_tmp->name, - file->the_bfd->my_archive->filename) == 0; - } - - if (skip) - break; - } - - if (!skip && sec->spec.name != NULL) - { - const char *sname = bfd_get_section_name (file->the_bfd, s); - - if (wildcardp (sec->spec.name)) - skip = fnmatch (sec->spec.name, sname, 0) != 0; - else - skip = strcmp (sec->spec.name, sname) != 0; - } - - if (!skip) - (*callback) (ptr, sec, s, file, data); - - sec = sec->next; - } - } -} - -/* Handle a wild statement for a single file F. */ - -static void -walk_wild_file (lang_wild_statement_type *s, - lang_input_statement_type *f, - callback_t callback, - void *data) -{ - if (f->the_bfd == NULL - || ! bfd_check_format (f->the_bfd, bfd_archive)) - walk_wild_section (s, f, callback, data); - else - { - bfd *member; - - /* This is an archive file. We must map each member of the - archive separately. */ - member = bfd_openr_next_archived_file (f->the_bfd, NULL); - while (member != NULL) - { - /* When lookup_name is called, it will call the add_symbols - entry point for the archive. For each element of the - archive which is included, BFD will call ldlang_add_file, - which will set the usrdata field of the member to the - lang_input_statement. */ - if (member->usrdata != NULL) - { - walk_wild_section (s, member->usrdata, callback, data); - } - - member = bfd_openr_next_archived_file (f->the_bfd, member); - } - } -} - -static void -walk_wild (lang_wild_statement_type *s, callback_t callback, void *data) -{ - const char *file_spec = s->filename; - - if (file_spec == NULL) - { - /* Perform the iteration over all files in the list. */ - LANG_FOR_EACH_INPUT_STATEMENT (f) - { - walk_wild_file (s, f, callback, data); - } - } - else if (wildcardp (file_spec)) - { - LANG_FOR_EACH_INPUT_STATEMENT (f) - { - if (fnmatch (file_spec, f->filename, FNM_FILE_NAME) == 0) - walk_wild_file (s, f, callback, data); - } - } - else - { - lang_input_statement_type *f; - - /* Perform the iteration over a single file. */ - f = lookup_name (file_spec); - if (f) - walk_wild_file (s, f, callback, data); - } -} - -/* lang_for_each_statement walks the parse tree and calls the provided - function for each node. */ - -static void -lang_for_each_statement_worker (void (*func) (lang_statement_union_type *), - lang_statement_union_type *s) -{ - for (; s != NULL; s = s->header.next) - { - func (s); - - switch (s->header.type) - { - case lang_constructors_statement_enum: - 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); - break; - case lang_wild_statement_enum: - lang_for_each_statement_worker - (func, - s->wild_statement.children.head); - break; - case lang_group_statement_enum: - lang_for_each_statement_worker (func, - s->group_statement.children.head); - break; - case lang_data_statement_enum: - case lang_reloc_statement_enum: - case lang_object_symbols_statement_enum: - case lang_output_statement_enum: - case lang_target_statement_enum: - case lang_input_section_enum: - case lang_input_statement_enum: - case lang_assignment_statement_enum: - case lang_padding_statement_enum: - case lang_address_statement_enum: - case lang_fill_statement_enum: - break; - default: - FAIL (); - break; - } - } -} - -void -lang_for_each_statement (void (*func) (lang_statement_union_type *)) -{ - lang_for_each_statement_worker (func, statement_list.head); -} - -/*----------------------------------------------------------------------*/ - -void -lang_list_init (lang_statement_list_type *list) -{ - list->head = NULL; - list->tail = &list->head; -} - -/* Build a new statement node for the parse tree. */ - -static lang_statement_union_type * -new_statement (enum statement_enum type, - size_t size, - lang_statement_list_type *list) -{ - lang_statement_union_type *new; - - new = stat_alloc (size); - new->header.type = type; - new->header.next = NULL; - lang_statement_append (list, new, &new->header.next); - return new; -} - -/* Build a new input file node for the language. There are several - ways in which we treat an input file, eg, we only look at symbols, - or prefix it with a -l etc. - - We can be supplied with requests for input files more than once; - they may, for example be split over several lines like foo.o(.text) - foo.o(.data) etc, so when asked for a file we check that we haven't - got it already so we don't duplicate the bfd. */ - -static lang_input_statement_type * -new_afile (const char *name, - lang_input_file_enum_type file_type, - const char *target, - bfd_boolean add_to_list) -{ - lang_input_statement_type *p; - - if (add_to_list) - p = new_stat (lang_input_statement, stat_ptr); - else - { - p = stat_alloc (sizeof (lang_input_statement_type)); - p->header.next = NULL; - } - - lang_has_input_file = TRUE; - p->target = target; - p->sysrooted = FALSE; - switch (file_type) - { - 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; - 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, NULL); - p->just_syms_flag = FALSE; - p->search_dirs_flag = 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; - 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; - 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; - break; - default: - FAIL (); - } - p->the_bfd = NULL; - p->asymbols = NULL; - p->next_real_file = NULL; - p->next = NULL; - p->symbol_count = 0; - p->dynamic = config.dynamic_link; - p->as_needed = as_needed; - p->whole_archive = whole_archive; - p->loaded = FALSE; - lang_statement_append (&input_file_chain, - (lang_statement_union_type *) p, - &p->next_real_file); - return p; -} - -lang_input_statement_type * -lang_add_input_file (const char *name, - lang_input_file_enum_type file_type, - const char *target) -{ - lang_has_input_file = TRUE; - return new_afile (name, file_type, target, TRUE); -} - -/* Build enough state so that the parser can build its tree. */ - -void -lang_init (void) -{ - obstack_begin (&stat_obstack, 1000); - - stat_ptr = &statement_list; - - lang_list_init (stat_ptr); - - lang_list_init (&input_file_chain); - lang_list_init (&lang_output_section_statement); - lang_list_init (&file_chain); - first_file = lang_add_input_file (NULL, lang_input_file_is_marker_enum, - NULL); - abs_output_section = - lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME); - - abs_output_section->bfd_section = bfd_abs_section_ptr; - - /* The value "3" is ad-hoc, somewhat related to the expected number of - DEFINED expressions in a linker script. For most default linker - scripts, there are none. Why a hash table then? Well, it's somewhat - simpler to re-use working machinery than using a linked list in terms - of code-complexity here in ld, besides the initialization which just - looks like other code here. */ - if (bfd_hash_table_init_n (&lang_definedness_table, - lang_definedness_newfunc, 3) != TRUE) - einfo (_("%P%F: out of memory during initialization")); - - /* Callers of exp_fold_tree need to increment this. */ - lang_statement_iteration = 0; -} - -/*---------------------------------------------------------------------- - A region is an area of memory declared with the - MEMORY { name:org=exp, len=exp ... } - syntax. - - We maintain a list of all the regions here. - - If no regions are specified in the script, then the default is used - which is created when looked up to be the entire data space. - - If create is true we are creating a region inside a MEMORY block. - In this case it is probably an error to create a region that has - 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. */ - -static lang_memory_region_type *lang_memory_region_list; -static lang_memory_region_type **lang_memory_region_list_tail = &lang_memory_region_list; - -lang_memory_region_type * -lang_memory_region_lookup (const char *const name, bfd_boolean create) -{ - lang_memory_region_type *p; - lang_memory_region_type *new; - - /* NAME is NULL for LMA memspecs if no region was specified. */ - if (name == NULL) - return NULL; - - for (p = lang_memory_region_list; p != NULL; p = p->next) - if (strcmp (p->name, name) == 0) - { - if (create) - einfo (_("%P:%S: warning: redeclaration of memory region '%s'\n"), name); - return p; - } - -#if 0 - /* This code used to always use the first region in the list as the - default region. I changed it to instead use a region - encompassing all of memory as the default region. This permits - NOLOAD sections to work reasonably without requiring a region. - People should specify what region they mean, if they really want - a region. */ - if (strcmp (name, DEFAULT_MEMORY_REGION) == 0) - { - if (lang_memory_region_list != NULL) - return lang_memory_region_list; - } -#endif - - if (!create && strcmp (name, DEFAULT_MEMORY_REGION)) - einfo (_("%P:%S: warning: memory region %s not declared\n"), name); - - new = stat_alloc (sizeof (lang_memory_region_type)); - - new->name = xstrdup (name); - new->next = NULL; - - *lang_memory_region_list_tail = new; - lang_memory_region_list_tail = &new->next; - new->origin = 0; - new->flags = 0; - new->not_flags = 0; - new->length = ~(bfd_size_type) 0; - new->current = 0; - new->had_full_message = FALSE; - - return new; -} - -static lang_memory_region_type * -lang_memory_default (asection *section) -{ - lang_memory_region_type *p; - - flagword sec_flags = section->flags; - - /* Override SEC_DATA to mean a writable section. */ - if ((sec_flags & (SEC_ALLOC | SEC_READONLY | SEC_CODE)) == SEC_ALLOC) - sec_flags |= SEC_DATA; - - for (p = lang_memory_region_list; p != NULL; p = p->next) - { - if ((p->flags & sec_flags) != 0 - && (p->not_flags & sec_flags) == 0) - { - return p; - } - } - return lang_memory_region_lookup (DEFAULT_MEMORY_REGION, FALSE); -} - -lang_output_section_statement_type * -lang_output_section_find (const char *const name) -{ - lang_statement_union_type *u; - lang_output_section_statement_type *lookup; - - for (u = lang_output_section_statement.head; u != NULL; u = lookup->next) - { - lookup = &u->output_section_statement; - if (strcmp (name, lookup->name) == 0) - return lookup; - } - return NULL; -} - -lang_output_section_statement_type * -lang_output_section_statement_lookup (const char *const name) -{ - lang_output_section_statement_type *lookup; - - lookup = lang_output_section_find (name); - if (lookup == NULL) - { - lookup = new_stat (lang_output_section_statement, stat_ptr); - lookup->region = NULL; - lookup->lma_region = NULL; - lookup->fill = 0; - lookup->block_value = 1; - lookup->name = name; - - lookup->next = NULL; - lookup->bfd_section = NULL; - lookup->processed = 0; - lookup->sectype = normal_section; - lookup->addr_tree = NULL; - lang_list_init (&lookup->children); - - lookup->memspec = NULL; - lookup->flags = 0; - lookup->subsection_alignment = -1; - lookup->section_alignment = -1; - lookup->load_base = NULL; - lookup->update_dot_tree = NULL; - lookup->phdrs = NULL; - - lang_statement_append (&lang_output_section_statement, - (lang_statement_union_type *) lookup, - &lookup->next); - } - return lookup; -} - -static void -lang_map_flags (flagword flag) -{ - if (flag & SEC_ALLOC) - minfo ("a"); - - if (flag & SEC_CODE) - minfo ("x"); - - if (flag & SEC_READONLY) - minfo ("r"); - - if (flag & SEC_DATA) - minfo ("w"); - - if (flag & SEC_LOAD) - minfo ("l"); -} - -void -lang_map (void) -{ - lang_memory_region_type *m; - - minfo (_("\nMemory Configuration\n\n")); - fprintf (config.map_file, "%-16s %-18s %-18s %s\n", - _("Name"), _("Origin"), _("Length"), _("Attributes")); - - for (m = lang_memory_region_list; m != NULL; m = m->next) - { - char buf[100]; - int len; - - fprintf (config.map_file, "%-16s ", m->name); - - sprintf_vma (buf, m->origin); - minfo ("0x%s ", buf); - len = strlen (buf); - while (len < 16) - { - print_space (); - ++len; - } - - minfo ("0x%V", m->length); - if (m->flags || m->not_flags) - { -#ifndef BFD64 - minfo (" "); -#endif - if (m->flags) - { - print_space (); - lang_map_flags (m->flags); - } - - if (m->not_flags) - { - minfo (" !"); - lang_map_flags (m->not_flags); - } - } - - print_nl (); - } - - fprintf (config.map_file, _("\nLinker script and memory map\n\n")); - - print_statements (); -} - -/* Initialize an output section. */ - -static void -init_os (lang_output_section_statement_type *s) -{ - section_userdata_type *new; - - if (s->bfd_section != NULL) - return; - - if (strcmp (s->name, DISCARD_SECTION_NAME) == 0) - einfo (_("%P%F: Illegal use of `%s' section\n"), DISCARD_SECTION_NAME); - - new = stat_alloc (sizeof (section_userdata_type)); - - s->bfd_section = bfd_get_section_by_name (output_bfd, s->name); - if (s->bfd_section == NULL) - s->bfd_section = bfd_make_section (output_bfd, s->name); - if (s->bfd_section == NULL) - { - einfo (_("%P%F: output format %s cannot represent section called %s\n"), - output_bfd->xvec->name, s->name); - } - s->bfd_section->output_section = s->bfd_section; - - /* We initialize an output sections output offset to minus its own - vma to allow us to output a section through itself. */ - s->bfd_section->output_offset = 0; - get_userdata (s->bfd_section) = new; - - /* If there is a base address, make sure that any sections it might - mention are initialized. */ - if (s->addr_tree != NULL) - exp_init_os (s->addr_tree); - - if (s->load_base != NULL) - exp_init_os (s->load_base); -} - -/* Make sure that all output sections mentioned in an expression are - initialized. */ - -static void -exp_init_os (etree_type *exp) -{ - switch (exp->type.node_class) - { - case etree_assign: - exp_init_os (exp->assign.src); - break; - - case etree_binary: - exp_init_os (exp->binary.lhs); - exp_init_os (exp->binary.rhs); - break; - - case etree_trinary: - exp_init_os (exp->trinary.cond); - exp_init_os (exp->trinary.lhs); - exp_init_os (exp->trinary.rhs); - break; - - case etree_assert: - exp_init_os (exp->assert_s.child); - break; - - case etree_unary: - exp_init_os (exp->unary.child); - break; - - case etree_name: - switch (exp->type.node_code) - { - case ADDR: - case LOADADDR: - case SIZEOF: - { - lang_output_section_statement_type *os; - - os = lang_output_section_find (exp->name.name); - if (os != NULL && os->bfd_section == NULL) - init_os (os); - } - } - break; - - default: - break; - } -} - -/* Sections marked with the SEC_LINK_ONCE flag should only be linked - once into the output. This routine checks each section, and - arrange to discard it if a section of the same name has already - been linked. If the section has COMDAT information, then it uses - that to decide whether the section should be included. This code - assumes that all relevant sections have the SEC_LINK_ONCE flag set; - that is, it does not depend solely upon the section name. - section_already_linked is called via bfd_map_over_sections. */ - -/* This is the shape of the elements inside the already_linked hash - table. It maps a name onto a list of already_linked elements with - the same name. It's possible to get more than one element in a - list if the COMDAT sections have different names. */ - -struct already_linked_hash_entry -{ - struct bfd_hash_entry root; - struct already_linked *entry; -}; - -struct already_linked -{ - struct already_linked *next; - asection *sec; -}; - -/* The hash table. */ - -static struct bfd_hash_table already_linked_table; - -static void -section_already_linked (bfd *abfd, asection *sec, void *data) -{ - lang_input_statement_type *entry = data; - flagword flags; - const char *name; - struct already_linked *l; - struct already_linked_hash_entry *already_linked_list; - - /* If we are only reading symbols from this object, then we want to - discard all sections. */ - if (entry->just_syms_flag) - { - bfd_link_just_syms (sec, &link_info); - return; - } - - flags = bfd_get_section_flags (abfd, sec); - - if ((flags & SEC_LINK_ONCE) == 0) - return; - - /* FIXME: When doing a relocatable link, we may have trouble - copying relocations in other sections that refer to local symbols - in the section being discarded. Those relocations will have to - be converted somehow; as of this writing I'm not sure that any of - the backends handle that correctly. - - It is tempting to instead not discard link once sections when - doing a relocatable link (technically, they should be discarded - whenever we are building constructors). However, that fails, - because the linker winds up combining all the link once sections - into a single large link once section, which defeats the purpose - of having link once sections in the first place. - - Also, not merging link once sections in a relocatable link - causes trouble for MIPS ELF, which relies on link once semantics - to handle the .reginfo section correctly. */ - - name = bfd_get_section_name (abfd, sec); - - already_linked_list = - ((struct already_linked_hash_entry *) - bfd_hash_lookup (&already_linked_table, name, TRUE, FALSE)); - - for (l = already_linked_list->entry; l != NULL; l = l->next) - { - if (sec->comdat == NULL - || l->sec->comdat == NULL - || strcmp (sec->comdat->name, l->sec->comdat->name) == 0) - { - /* The section has already been linked. See if we should - issue a warning. */ - switch (flags & SEC_LINK_DUPLICATES) - { - default: - abort (); - - case SEC_LINK_DUPLICATES_DISCARD: - break; - - case SEC_LINK_DUPLICATES_ONE_ONLY: - if (sec->comdat == NULL) - einfo (_("%P: %B: warning: ignoring duplicate section `%s'\n"), - abfd, name); - else - einfo (_("%P: %B: warning: ignoring duplicate `%s' section symbol `%s'\n"), - abfd, name, sec->comdat->name); - break; - - case SEC_LINK_DUPLICATES_SAME_CONTENTS: - /* FIXME: We should really dig out the contents of both - sections and memcmp them. The COFF/PE spec says that - the Microsoft linker does not implement this - correctly, so I'm not going to bother doing it - either. */ - /* Fall through. */ - case SEC_LINK_DUPLICATES_SAME_SIZE: - if (bfd_section_size (abfd, sec) - != bfd_section_size (l->sec->owner, l->sec)) - einfo (_("%P: %B: warning: duplicate section `%s' has different size\n"), - abfd, name); - break; - } - - /* Set the output_section field so that lang_add_section - does not create a lang_input_section structure for this - section. Since there might be a symbol in the section - being discarded, we must retain a pointer to the section - which we are really going to use. */ - sec->output_section = bfd_abs_section_ptr; - sec->kept_section = l->sec; - - if (flags & SEC_GROUP) - bfd_discard_group (abfd, sec); - - return; - } - } - - /* This is the first section with this name. Record it. Allocate - the memory from the same obstack as the hash table is kept in. */ - - l = bfd_hash_allocate (&already_linked_table, sizeof *l); - - l->sec = sec; - l->next = already_linked_list->entry; - already_linked_list->entry = l; -} - -/* Support routines for the hash table used by section_already_linked, - initialize the table, fill in an entry and remove the table. */ - -static struct bfd_hash_entry * -already_linked_newfunc (struct bfd_hash_entry *entry ATTRIBUTE_UNUSED, - struct bfd_hash_table *table, - const char *string ATTRIBUTE_UNUSED) -{ - struct already_linked_hash_entry *ret = - bfd_hash_allocate (table, sizeof (struct already_linked_hash_entry)); - - ret->entry = NULL; - - return &ret->root; -} - -static void -already_linked_table_init (void) -{ - if (! bfd_hash_table_init_n (&already_linked_table, - already_linked_newfunc, - 42)) - einfo (_("%P%F: Failed to create hash table\n")); -} - -static void -already_linked_table_free (void) -{ - bfd_hash_table_free (&already_linked_table); -} - -/* The wild routines. - - These expand statements like *(.text) and foo.o to a list of - explicit actions, like foo.o(.text), bar.o(.text) and - foo.o(.text, .data). */ - -/* Return TRUE if the PATTERN argument is a wildcard pattern. - Although backslashes are treated specially if a pattern contains - wildcards, we do not consider the mere presence of a backslash to - be enough to cause the pattern to be treated as a wildcard. - That lets us handle DOS filenames more naturally. */ - -static bfd_boolean -wildcardp (const char *pattern) -{ - const char *s; - - for (s = pattern; *s != '\0'; ++s) - if (*s == '?' - || *s == '*' - || *s == '[') - return TRUE; - return FALSE; -} - -/* 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. */ - -void -lang_add_section (lang_statement_list_type *ptr, - asection *section, - lang_output_section_statement_type *output, - lang_input_statement_type *file) -{ - flagword flags; - bfd_boolean discard; - - flags = bfd_get_section_flags (section->owner, section); - - discard = FALSE; - - /* Discard sections marked with SEC_EXCLUDE if we are doing a final - link. Discard debugging sections marked with SEC_EXCLUDE on a - relocatable link too. */ - if ((flags & SEC_EXCLUDE) != 0 - && ((flags & SEC_DEBUGGING) != 0 || !link_info.relocatable)) - discard = TRUE; - - /* Discard input sections which are assigned to a section named - DISCARD_SECTION_NAME. */ - if (strcmp (output->name, DISCARD_SECTION_NAME) == 0) - discard = TRUE; - - /* Discard debugging sections if we are stripping debugging - information. */ - if ((link_info.strip == strip_debugger || link_info.strip == strip_all) - && (flags & SEC_DEBUGGING) != 0) - discard = TRUE; - - if (discard) - { - if (section->output_section == NULL) - { - /* This prevents future calls from assigning this section. */ - section->output_section = bfd_abs_section_ptr; - } - return; - } - - if (section->output_section == NULL) - { - bfd_boolean first; - lang_input_section_type *new; - flagword flags; - - if (output->bfd_section == NULL) - init_os (output); - - first = ! output->bfd_section->linker_has_input; - output->bfd_section->linker_has_input = 1; - - /* Add a section reference to the list. */ - new = new_stat (lang_input_section, ptr); - - new->section = section; - new->ifile = file; - section->output_section = output->bfd_section; - - flags = section->flags; - - /* We don't copy the SEC_NEVER_LOAD flag from an input section - to an output section, because we want to be able to include a - SEC_NEVER_LOAD section in the middle of an otherwise loaded - section (I don't know why we want to do this, but we do). - build_link_order in ldwrite.c handles this case by turning - the embedded SEC_NEVER_LOAD section into a fill. */ - - flags &= ~ SEC_NEVER_LOAD; - - /* If final link, don't copy the SEC_LINK_ONCE flags, they've - already been processed. One reason to do this is that on pe - format targets, .text$foo sections go into .text and it's odd - to see .text with SEC_LINK_ONCE set. */ - - if (! link_info.relocatable) - flags &= ~ (SEC_LINK_ONCE | SEC_LINK_DUPLICATES); - - /* If this is not the first input section, and the SEC_READONLY - flag is not currently set, then don't set it just because the - input section has it set. */ - - if (! first && (section->output_section->flags & SEC_READONLY) == 0) - flags &= ~ SEC_READONLY; - - /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */ - if (! first - && ((section->output_section->flags & (SEC_MERGE | SEC_STRINGS)) - != (flags & (SEC_MERGE | SEC_STRINGS)) - || ((flags & SEC_MERGE) - && section->output_section->entsize != section->entsize))) - { - section->output_section->flags &= ~ (SEC_MERGE | SEC_STRINGS); - flags &= ~ (SEC_MERGE | SEC_STRINGS); - } - - section->output_section->flags |= flags; - - if (flags & SEC_MERGE) - section->output_section->entsize = section->entsize; - - /* If SEC_READONLY is not set in the input section, then clear - it from the output section. */ - if ((section->flags & SEC_READONLY) == 0) - section->output_section->flags &= ~SEC_READONLY; - - switch (output->sectype) - { - case normal_section: - break; - case dsect_section: - case copy_section: - case info_section: - case overlay_section: - output->bfd_section->flags &= ~SEC_ALLOC; - break; - case noload_section: - output->bfd_section->flags &= ~SEC_LOAD; - output->bfd_section->flags |= SEC_NEVER_LOAD; - break; - } - - /* Copy over SEC_SMALL_DATA. */ - if (section->flags & SEC_SMALL_DATA) - section->output_section->flags |= SEC_SMALL_DATA; - - if (section->alignment_power > output->bfd_section->alignment_power) - output->bfd_section->alignment_power = section->alignment_power; - - /* If supplied an alignment, then force it. */ - if (output->section_alignment != -1) - output->bfd_section->alignment_power = output->section_alignment; - - if (section->flags & SEC_BLOCK) - { - section->output_section->flags |= SEC_BLOCK; - /* FIXME: This value should really be obtained from the bfd... */ - output->block_value = 128; - } - } -} - -/* Handle wildcard sorting. This returns the lang_input_section which - should follow the one we are going to create for SECTION and FILE, - based on the sorting requirements of WILD. It returns NULL if the - new section should just go at the end of the current list. */ - -static lang_statement_union_type * -wild_sort (lang_wild_statement_type *wild, - struct wildcard_list *sec, - 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)) - 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; - - if (l->header.type != lang_input_section_enum) - continue; - ls = &l->input_section; - - /* Sorting by filename takes precedence over sorting by section - name. */ - - if (wild->filenames_sorted) - { - const char *fn, *ln; - bfd_boolean fa, la; - int i; - - /* The PE support for the .idata section as generated by - dlltool assumes that files will be sorted by the name of - the archive and then the name of the file within the - archive. */ - - if (file->the_bfd != NULL - && bfd_my_archive (file->the_bfd) != NULL) - { - fn = bfd_get_filename (bfd_my_archive (file->the_bfd)); - fa = TRUE; - } - else - { - fn = file->filename; - fa = FALSE; - } - - if (ls->ifile->the_bfd != NULL - && bfd_my_archive (ls->ifile->the_bfd) != NULL) - { - ln = bfd_get_filename (bfd_my_archive (ls->ifile->the_bfd)); - la = TRUE; - } - else - { - ln = ls->ifile->filename; - la = FALSE; - } - - i = strcmp (fn, ln); - if (i > 0) - continue; - else if (i < 0) - break; - - if (fa || la) - { - if (fa) - fn = file->filename; - if (la) - ln = ls->ifile->filename; - - i = strcmp (fn, ln); - if (i > 0) - continue; - else if (i < 0) - break; - } - } - - /* Here either the files are not sorted by name, or we are - looking at the sections for this file. */ - - if (sec != NULL && sec->spec.sorted) - { - if (strcmp (section_name, - bfd_get_section_name (ls->ifile->the_bfd, - ls->section)) - < 0) - break; - } - } - - return l; -} - -/* Expand a wild statement for a particular FILE. SECTION may be - NULL, in which case it is a wild card. */ - -static void -output_section_callback (lang_wild_statement_type *ptr, - struct wildcard_list *sec, - asection *section, - lang_input_statement_type *file, - void *output) -{ - lang_statement_union_type *before; - - /* Exclude sections that match UNIQUE_SECTION_LIST. */ - if (unique_section_p (bfd_get_section_name (file->the_bfd, section))) - return; - - /* If the wild pattern was marked KEEP, the member sections - should be as well. */ - if (ptr->keep_sections) - section->flags |= SEC_KEEP; - - before = wild_sort (ptr, sec, file, section); - - /* Here BEFORE points to the lang_input_section which - should follow the one we are about to add. If BEFORE - is NULL, then the section should just go at the end - of the current list. */ - - if (before == NULL) - lang_add_section (&ptr->children, section, - (lang_output_section_statement_type *) output, - file); - else - { - lang_statement_list_type list; - lang_statement_union_type **pp; - - lang_list_init (&list); - lang_add_section (&list, section, - (lang_output_section_statement_type *) output, - file); - - /* If we are discarding the section, LIST.HEAD will - be NULL. */ - if (list.head != NULL) - { - ASSERT (list.head->header.next == NULL); - - for (pp = &ptr->children.head; - *pp != before; - pp = &(*pp)->header.next) - ASSERT (*pp != NULL); - - list.head->header.next = *pp; - *pp = list.head; - } - } -} - -/* This is passed a file name which must have been seen already and - added to the statement tree. We will see if it has been opened - already and had its symbols read. If not then we'll read it. */ - -static lang_input_statement_type * -lookup_name (const char *name) -{ - lang_input_statement_type *search; - - for (search = (lang_input_statement_type *) input_file_chain.head; - search != NULL; - search = (lang_input_statement_type *) search->next_real_file) - { - /* Use the local_sym_name as the name of the file that has - already been loaded as filename might have been transformed - via the search directory lookup mechanism. */ - const char * filename = search->local_sym_name; - - if (filename == NULL && name == NULL) - return search; - if (filename != NULL - && name != NULL - && strcmp (filename, name) == 0) - break; - } - - if (search == NULL) - search = new_afile (name, lang_input_file_is_search_file_enum, default_target, - FALSE); - - /* If we have already added this file, or this file is not real - (FIXME: can that ever actually happen?) or the name is NULL - (FIXME: can that ever actually happen?) don't add this file. */ - if (search->loaded - || ! search->real - || search->filename == NULL) - return search; - - if (! load_symbols (search, NULL)) - return NULL; - - return search; -} - -/* Get the symbols for an input file. */ - -static bfd_boolean -load_symbols (lang_input_statement_type *entry, - lang_statement_list_type *place) -{ - char **matching; - - if (entry->loaded) - return TRUE; - - ldfile_open_file (entry); - - if (! bfd_check_format (entry->the_bfd, bfd_archive) - && ! bfd_check_format_matches (entry->the_bfd, bfd_object, &matching)) - { - bfd_error_type err; - lang_statement_list_type *hold; - bfd_boolean bad_load = TRUE; - bfd_boolean save_ldlang_sysrooted_script; - - err = bfd_get_error (); - - /* See if the emulation has some special knowledge. */ - if (ldemul_unrecognized_file (entry)) - return TRUE; - - if (err == bfd_error_file_ambiguously_recognized) - { - char **p; - - einfo (_("%B: file not recognized: %E\n"), entry->the_bfd); - einfo (_("%B: matching formats:"), entry->the_bfd); - for (p = matching; *p != NULL; p++) - einfo (" %s", *p); - einfo ("%F\n"); - } - else if (err != bfd_error_file_not_recognized - || place == NULL) - einfo (_("%F%B: file not recognized: %E\n"), entry->the_bfd); - else - bad_load = FALSE; - - bfd_close (entry->the_bfd); - entry->the_bfd = NULL; - - /* Try to interpret the file as a linker script. */ - ldfile_open_command_file (entry->filename); - - hold = stat_ptr; - stat_ptr = place; - save_ldlang_sysrooted_script = ldlang_sysrooted_script; - ldlang_sysrooted_script = entry->sysrooted; - - ldfile_assumed_script = TRUE; - parser_input = input_script; - yyparse (); - ldfile_assumed_script = FALSE; - - ldlang_sysrooted_script = save_ldlang_sysrooted_script; - stat_ptr = hold; - - return ! bad_load; - } - - if (ldemul_recognized_file (entry)) - return TRUE; - - /* We don't call ldlang_add_file for an archive. Instead, the - add_symbols entry point will call ldlang_add_file, via the - add_archive_element callback, for each element of the archive - which is used. */ - switch (bfd_get_format (entry->the_bfd)) - { - default: - break; - - case bfd_object: - ldlang_add_file (entry); - if (trace_files || trace_file_tries) - info_msg ("%I\n", entry); - break; - - case bfd_archive: - if (entry->whole_archive) - { - bfd *member = NULL; - bfd_boolean loaded = TRUE; - - for (;;) - { - member = bfd_openr_next_archived_file (entry->the_bfd, member); - - if (member == NULL) - break; - - if (! bfd_check_format (member, bfd_object)) - { - einfo (_("%F%B: member %B in archive is not an object\n"), - entry->the_bfd, member); - loaded = FALSE; - } - - if (! ((*link_info.callbacks->add_archive_element) - (&link_info, member, "--whole-archive"))) - abort (); - - if (! bfd_link_add_symbols (member, &link_info)) - { - einfo (_("%F%B: could not read symbols: %E\n"), member); - loaded = FALSE; - } - } - - entry->loaded = loaded; - return loaded; - } - break; - } - - if (bfd_link_add_symbols (entry->the_bfd, &link_info)) - entry->loaded = TRUE; - else - einfo (_("%F%B: could not read symbols: %E\n"), entry->the_bfd); - - return entry->loaded; -} - -/* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both - may be NULL, indicating that it is a wildcard. Separate - lang_input_section statements are created for each part of the - expansion; they are added after the wild statement S. OUTPUT is - the output section. */ - -static void -wild (lang_wild_statement_type *s, - const char *target ATTRIBUTE_UNUSED, - lang_output_section_statement_type *output) -{ - struct wildcard_list *sec; - - walk_wild (s, output_section_callback, output); - - for (sec = s->section_list; sec != NULL; sec = sec->next) - { - if (default_common_section != NULL) - break; - if (sec->spec.name != NULL && strcmp (sec->spec.name, "COMMON") == 0) - { - /* Remember the section that common is going to in case we - later get something which doesn't know where to put it. */ - default_common_section = output; - } - } -} - -/* Return TRUE iff target is the sought target. */ - -static int -get_target (const bfd_target *target, void *data) -{ - const char *sought = data; - - return strcmp (target->name, sought) == 0; -} - -/* Like strcpy() but convert to lower case as well. */ - -static void -stricpy (char *dest, char *src) -{ - char c; - - while ((c = *src++) != 0) - *dest++ = TOLOWER (c); - - *dest = 0; -} - -/* Remove the first occurrence of needle (if any) in haystack - from haystack. */ - -static void -strcut (char *haystack, char *needle) -{ - haystack = strstr (haystack, needle); - - if (haystack) - { - char *src; - - for (src = haystack + strlen (needle); *src;) - *haystack++ = *src++; - - *haystack = 0; - } -} - -/* Compare two target format name strings. - Return a value indicating how "similar" they are. */ - -static int -name_compare (char *first, char *second) -{ - char *copy1; - char *copy2; - int result; - - copy1 = xmalloc (strlen (first) + 1); - copy2 = xmalloc (strlen (second) + 1); - - /* Convert the names to lower case. */ - stricpy (copy1, first); - stricpy (copy2, second); - - /* Remove size and endian strings from the name. */ - strcut (copy1, "big"); - strcut (copy1, "little"); - strcut (copy2, "big"); - strcut (copy2, "little"); - - /* Return a value based on how many characters match, - starting from the beginning. If both strings are - the same then return 10 * their length. */ - for (result = 0; copy1[result] == copy2[result]; result++) - if (copy1[result] == 0) - { - result *= 10; - break; - } - - free (copy1); - free (copy2); - - return result; -} - -/* Set by closest_target_match() below. */ -static const bfd_target *winner; - -/* Scan all the valid bfd targets looking for one that has the endianness - requirement that was specified on the command line, and is the nearest - match to the original output target. */ - -static int -closest_target_match (const bfd_target *target, void *data) -{ - const bfd_target *original = data; - - if (command_line.endian == ENDIAN_BIG - && target->byteorder != BFD_ENDIAN_BIG) - return 0; - - if (command_line.endian == ENDIAN_LITTLE - && target->byteorder != BFD_ENDIAN_LITTLE) - return 0; - - /* Must be the same flavour. */ - if (target->flavour != original->flavour) - return 0; - - /* If we have not found a potential winner yet, then record this one. */ - if (winner == NULL) - { - winner = target; - return 0; - } - - /* Oh dear, we now have two potential candidates for a successful match. - Compare their names and choose the better one. */ - if (name_compare (target->name, original->name) - > name_compare (winner->name, original->name)) - winner = target; - - /* Keep on searching until wqe have checked them all. */ - return 0; -} - -/* Return the BFD target format of the first input file. */ - -static char * -get_first_input_target (void) -{ - char *target = NULL; - - LANG_FOR_EACH_INPUT_STATEMENT (s) - { - if (s->header.type == lang_input_statement_enum - && s->real) - { - ldfile_open_file (s); - - if (s->the_bfd != NULL - && bfd_check_format (s->the_bfd, bfd_object)) - { - target = bfd_get_target (s->the_bfd); - - if (target != NULL) - break; - } - } - } - - return target; -} - -const char * -lang_get_output_target (void) -{ - const char *target; - - /* Has the user told us which output format to use? */ - if (output_target != NULL) - return output_target; - - /* No - has the current target been set to something other than - the default? */ - if (current_target != default_target) - return current_target; - - /* No - can we determine the format of the first input file? */ - target = get_first_input_target (); - if (target != NULL) - return target; - - /* Failed - use the default output target. */ - return default_target; -} - -/* Open the output file. */ - -static bfd * -open_output (const char *name) -{ - bfd *output; - - output_target = lang_get_output_target (); - - /* Has the user requested a particular endianness on the command - line? */ - if (command_line.endian != ENDIAN_UNSET) - { - const bfd_target *target; - enum bfd_endian desired_endian; - - /* Get the chosen target. */ - target = bfd_search_for_target (get_target, (void *) output_target); - - /* If the target is not supported, we cannot do anything. */ - if (target != NULL) - { - if (command_line.endian == ENDIAN_BIG) - desired_endian = BFD_ENDIAN_BIG; - else - desired_endian = BFD_ENDIAN_LITTLE; - - /* See if the target has the wrong endianness. This should - not happen if the linker script has provided big and - little endian alternatives, but some scrips don't do - this. */ - if (target->byteorder != desired_endian) - { - /* If it does, then see if the target provides - an alternative with the correct endianness. */ - if (target->alternative_target != NULL - && (target->alternative_target->byteorder == desired_endian)) - output_target = target->alternative_target->name; - else - { - /* Try to find a target as similar as possible to - the default target, but which has the desired - endian characteristic. */ - bfd_search_for_target (closest_target_match, - (void *) target); - - /* Oh dear - we could not find any targets that - satisfy our requirements. */ - if (winner == NULL) - einfo (_("%P: warning: could not find any targets that match endianness requirement\n")); - else - output_target = winner->name; - } - } - } - } - - output = bfd_openw (name, output_target); - - if (output == NULL) - { - if (bfd_get_error () == bfd_error_invalid_target) - einfo (_("%P%F: target %s not found\n"), output_target); - - einfo (_("%P%F: cannot open output file %s: %E\n"), name); - } - - delete_output_file_on_failure = TRUE; - -#if 0 - output->flags |= D_PAGED; -#endif - - if (! bfd_set_format (output, bfd_object)) - einfo (_("%P%F:%s: can not make object file: %E\n"), name); - if (! bfd_set_arch_mach (output, - ldfile_output_architecture, - ldfile_output_machine)) - einfo (_("%P%F:%s: can not set architecture: %E\n"), name); - - link_info.hash = bfd_link_hash_table_create (output); - if (link_info.hash == NULL) - einfo (_("%P%F: can not create link hash table: %E\n")); - - bfd_set_gp_size (output, g_switch_value); - return output; -} - -static void -ldlang_open_output (lang_statement_union_type *statement) -{ - switch (statement->header.type) - { - case lang_output_statement_enum: - ASSERT (output_bfd == NULL); - output_bfd = open_output (statement->output_statement.name); - ldemul_set_output_arch (); - if (config.magic_demand_paged && !link_info.relocatable) - output_bfd->flags |= D_PAGED; - else - output_bfd->flags &= ~D_PAGED; - if (config.text_read_only) - output_bfd->flags |= WP_TEXT; - else - output_bfd->flags &= ~WP_TEXT; - if (link_info.traditional_format) - output_bfd->flags |= BFD_TRADITIONAL_FORMAT; - else - output_bfd->flags &= ~BFD_TRADITIONAL_FORMAT; - break; - - case lang_target_statement_enum: - current_target = statement->target_statement.target; - break; - default: - break; - } -} - -/* Convert between addresses in bytes and sizes in octets. - For currently supported targets, octets_per_byte is always a power - of two, so we can use shifts. */ -#define TO_ADDR(X) ((X) >> opb_shift) -#define TO_SIZE(X) ((X) << opb_shift) - -/* Support the above. */ -static unsigned int opb_shift = 0; - -static void -init_opb (void) -{ - unsigned x = bfd_arch_mach_octets_per_byte (ldfile_output_architecture, - ldfile_output_machine); - opb_shift = 0; - if (x > 1) - while ((x & 1) == 0) - { - x >>= 1; - ++opb_shift; - } - ASSERT (x == 1); -} - -/* Open all the input files. */ - -static void -open_input_bfds (lang_statement_union_type *s, bfd_boolean force) -{ - for (; s != NULL; s = s->header.next) - { - switch (s->header.type) - { - case lang_constructors_statement_enum: - open_input_bfds (constructor_list.head, force); - break; - case lang_output_section_statement_enum: - open_input_bfds (s->output_section_statement.children.head, force); - break; - case lang_wild_statement_enum: - /* Maybe we should load the file's symbols. */ - if (s->wild_statement.filename - && ! wildcardp (s->wild_statement.filename)) - lookup_name (s->wild_statement.filename); - open_input_bfds (s->wild_statement.children.head, force); - break; - case lang_group_statement_enum: - { - struct bfd_link_hash_entry *undefs; - - /* We must continually search the entries in the group - until no new symbols are added to the list of undefined - symbols. */ - - do - { - undefs = link_info.hash->undefs_tail; - open_input_bfds (s->group_statement.children.head, TRUE); - } - while (undefs != link_info.hash->undefs_tail); - } - break; - case lang_target_statement_enum: - current_target = s->target_statement.target; - break; - case lang_input_statement_enum: - if (s->input_statement.real) - { - lang_statement_list_type add; - - s->input_statement.target = current_target; - - /* 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 - && bfd_check_format (s->input_statement.the_bfd, - bfd_archive)) - s->input_statement.loaded = FALSE; - - lang_list_init (&add); - - if (! load_symbols (&s->input_statement, &add)) - config.make_executable = FALSE; - - if (add.head != NULL) - { - *add.tail = s->header.next; - s->header.next = add.head; - } - } - break; - default: - break; - } - } -} - -/* If there are [COMMONS] statements, put a wild one into the bss - section. */ - -static void -lang_reasonable_defaults (void) -{ -#if 0 - lang_output_section_statement_lookup (".text"); - lang_output_section_statement_lookup (".data"); - - default_common_section = lang_output_section_statement_lookup (".bss"); - - if (!placed_commons) - { - lang_wild_statement_type *new = - new_stat (lang_wild_statement, - &default_common_section->children); - - new->section_name = "COMMON"; - new->filename = NULL; - lang_list_init (&new->children); - } -#endif -} - -/* Add a symbol to a hash of symbols used in DEFINED (NAME) expressions. */ - -void -lang_track_definedness (const char *name) -{ - if (bfd_hash_lookup (&lang_definedness_table, name, TRUE, FALSE) == NULL) - einfo (_("%P%F: bfd_hash_lookup failed creating symbol %s\n"), name); -} - -/* New-function for the definedness hash table. */ - -static struct bfd_hash_entry * -lang_definedness_newfunc (struct bfd_hash_entry *entry, - struct bfd_hash_table *table ATTRIBUTE_UNUSED, - const char *name ATTRIBUTE_UNUSED) -{ - struct lang_definedness_hash_entry *ret - = (struct lang_definedness_hash_entry *) entry; - - if (ret == NULL) - ret = (struct lang_definedness_hash_entry *) - bfd_hash_allocate (table, sizeof (struct lang_definedness_hash_entry)); - - if (ret == NULL) - einfo (_("%P%F: bfd_hash_allocate failed creating symbol %s\n"), name); - - ret->iteration = -1; - return &ret->root; -} - -/* Return the iteration when the definition of NAME was last updated. A - value of -1 means that the symbol is not defined in the linker script - or the command line, but may be defined in the linker symbol table. */ - -int -lang_symbol_definition_iteration (const char *name) -{ - struct lang_definedness_hash_entry *defentry - = (struct lang_definedness_hash_entry *) - bfd_hash_lookup (&lang_definedness_table, name, FALSE, FALSE); - - /* We've already created this one on the presence of DEFINED in the - script, so it can't be NULL unless something is borked elsewhere in - the code. */ - if (defentry == NULL) - FAIL (); - - return defentry->iteration; -} - -/* Update the definedness state of NAME. */ - -void -lang_update_definedness (const char *name, struct bfd_link_hash_entry *h) -{ - struct lang_definedness_hash_entry *defentry - = (struct lang_definedness_hash_entry *) - bfd_hash_lookup (&lang_definedness_table, name, FALSE, FALSE); - - /* We don't keep track of symbols not tested with DEFINED. */ - if (defentry == NULL) - return; - - /* If the symbol was already defined, and not from an earlier statement - iteration, don't update the definedness iteration, because that'd - make the symbol seem defined in the linker script at this point, and - it wasn't; it was defined in some object. If we do anyway, DEFINED - would start to yield false before this point and the construct "sym = - DEFINED (sym) ? sym : X;" would change sym to X despite being defined - in an object. */ - if (h->type != bfd_link_hash_undefined - && h->type != bfd_link_hash_common - && h->type != bfd_link_hash_new - && defentry->iteration == -1) - return; - - defentry->iteration = lang_statement_iteration; -} - -/* Add the supplied name to the symbol table as an undefined reference. - This is a two step process as the symbol table doesn't even exist at - the time the ld command line is processed. First we put the name - on a list, then, once the output file has been opened, transfer the - name to the symbol table. */ - -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_undef_chain_list_type *new = - stat_alloc (sizeof (ldlang_undef_chain_list_type)); - - new->next = ldlang_undef_chain_list_head; - ldlang_undef_chain_list_head = new; - - new->name = xstrdup (name); - - if (output_bfd != NULL) - insert_undefined (new->name); -} - -/* Insert NAME as undefined in the symbol table. */ - -static void -insert_undefined (const char *name) -{ - struct bfd_link_hash_entry *h; - - h = bfd_link_hash_lookup (link_info.hash, name, TRUE, FALSE, 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; - h->u.undef.abfd = NULL; - bfd_link_add_undef (link_info.hash, h); - } -} - -/* Run through the list of undefineds created above and place them - into the linker hash table as undefined symbols belonging to the - script file. */ - -static void -lang_place_undefineds (void) -{ - ldlang_undef_chain_list_type *ptr; - - for (ptr = ldlang_undef_chain_list_head; ptr != NULL; ptr = ptr->next) - insert_undefined (ptr->name); -} - -/* Open input files and attach to output sections. */ - -static void -map_input_to_output_sections - (lang_statement_union_type *s, const char *target, - lang_output_section_statement_type *output_section_statement) -{ - for (; s != NULL; s = s->header.next) - { - switch (s->header.type) - { - case lang_wild_statement_enum: - wild (&s->wild_statement, target, output_section_statement); - break; - case lang_constructors_statement_enum: - map_input_to_output_sections (constructor_list.head, - target, - output_section_statement); - break; - case lang_output_section_statement_enum: - map_input_to_output_sections (s->output_section_statement.children.head, - target, - &s->output_section_statement); - break; - case lang_output_statement_enum: - break; - case lang_target_statement_enum: - target = s->target_statement.target; - break; - case lang_group_statement_enum: - map_input_to_output_sections (s->group_statement.children.head, - target, - output_section_statement); - break; - case lang_data_statement_enum: - /* Make sure that any sections mentioned in the expression - are initialized. */ - exp_init_os (s->data_statement.exp); - /* FALLTHROUGH */ - case lang_fill_statement_enum: - case lang_input_section_enum: - case lang_object_symbols_statement_enum: - case lang_reloc_statement_enum: - case lang_padding_statement_enum: - case lang_input_statement_enum: - if (output_section_statement != NULL - && output_section_statement->bfd_section == NULL) - init_os (output_section_statement); - break; - case lang_assignment_statement_enum: - if (output_section_statement != NULL - && output_section_statement->bfd_section == NULL) - init_os (output_section_statement); - - /* Make sure that any sections mentioned in the assignment - are initialized. */ - exp_init_os (s->assignment_statement.exp); - break; - case lang_afile_asection_pair_statement_enum: - FAIL (); - break; - case lang_address_statement_enum: - /* Mark the specified section with the supplied address. */ - { - lang_output_section_statement_type *os = - lang_output_section_statement_lookup - (s->address_statement.section_name); - - if (os->bfd_section == NULL) - init_os (os); - os->addr_tree = s->address_statement.address; - } - break; - } - } -} - -/* An output section might have been removed after its statement was - added. For example, ldemul_before_allocation can remove dynamic - sections if they turn out to be not needed. Clean them up here. */ - -static void -strip_excluded_output_sections (void) -{ - lang_statement_union_type *u; - - for (u = lang_output_section_statement.head; - u != NULL; - u = u->output_section_statement.next) - { - lang_output_section_statement_type *os; - asection *s; - - os = &u->output_section_statement; - s = os->bfd_section; - if (s != NULL && (s->flags & SEC_EXCLUDE) != 0) - { - asection **p; - - os->bfd_section = NULL; - - for (p = &output_bfd->sections; *p; p = &(*p)->next) - if (*p == s) - { - bfd_section_list_remove (output_bfd, p); - output_bfd->section_count--; - break; - } - } - } -} - -static void -print_output_section_statement - (lang_output_section_statement_type *output_section_statement) -{ - asection *section = output_section_statement->bfd_section; - int len; - - if (output_section_statement != abs_output_section) - { - minfo ("\n%s", output_section_statement->name); - - if (section != NULL) - { - print_dot = section->vma; - - len = strlen (output_section_statement->name); - if (len >= SECTION_NAME_MAP_LENGTH - 1) - { - print_nl (); - len = 0; - } - while (len < SECTION_NAME_MAP_LENGTH) - { - print_space (); - ++len; - } - - minfo ("0x%V %W", section->vma, section->_raw_size); - - if (output_section_statement->load_base != NULL) - { - bfd_vma addr; - - addr = exp_get_abs_int (output_section_statement->load_base, 0, - "load base", lang_final_phase_enum); - minfo (_(" load address 0x%V"), addr); - } - } - - print_nl (); - } - - print_statement_list (output_section_statement->children.head, - output_section_statement); -} - -static void -print_assignment (lang_assignment_statement_type *assignment, - lang_output_section_statement_type *output_section) -{ - int i; - etree_value_type result; - - for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++) - print_space (); - - result = exp_fold_tree (assignment->exp->assign.src, output_section, - lang_final_phase_enum, print_dot, &print_dot); - if (result.valid_p) - { - const char *dst; - bfd_vma value; - - value = result.value + result.section->bfd_section->vma; - dst = assignment->exp->assign.dst; - - minfo ("0x%V", value); - if (dst[0] == '.' && dst[1] == 0) - print_dot = value; - } - else - { - minfo ("*undef* "); -#ifdef BFD64 - minfo (" "); -#endif - } - - minfo (" "); - - exp_print_tree (assignment->exp); - - print_nl (); -} - -static void -print_input_statement (lang_input_statement_type *statm) -{ - if (statm->filename != NULL) - { - fprintf (config.map_file, "LOAD %s\n", statm->filename); - } -} - -/* Print all symbols defined in a particular section. This is called - via bfd_link_hash_traverse. */ - -static bfd_boolean -print_one_symbol (struct bfd_link_hash_entry *hash_entry, void *ptr) -{ - asection *sec = ptr; - - if ((hash_entry->type == bfd_link_hash_defined - || hash_entry->type == bfd_link_hash_defweak) - && sec == hash_entry->u.def.section) - { - int i; - - for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++) - print_space (); - minfo ("0x%V ", - (hash_entry->u.def.value - + hash_entry->u.def.section->output_offset - + hash_entry->u.def.section->output_section->vma)); - - minfo (" %T\n", hash_entry->root.string); - } - - return TRUE; -} - -/* Print information about an input section to the map file. */ - -static void -print_input_section (lang_input_section_type *in) -{ - asection *i = in->section; - bfd_size_type size = i->_cooked_size != 0 ? i->_cooked_size : i->_raw_size; - - init_opb (); - if (size != 0) - { - print_space (); - - minfo ("%s", i->name); - - if (i->output_section != NULL) - { - int len; - - len = 1 + strlen (i->name); - if (len >= SECTION_NAME_MAP_LENGTH - 1) - { - print_nl (); - len = 0; - } - while (len < SECTION_NAME_MAP_LENGTH) - { - print_space (); - ++len; - } - - minfo ("0x%V %W %B\n", - i->output_section->vma + i->output_offset, TO_ADDR (size), - i->owner); - - if (i->_cooked_size != 0 && i->_cooked_size != i->_raw_size) - { - len = SECTION_NAME_MAP_LENGTH + 3; -#ifdef BFD64 - len += 16; -#else - len += 8; -#endif - while (len > 0) - { - print_space (); - --len; - } - - minfo (_("%W (size before relaxing)\n"), i->_raw_size); - } - - bfd_link_hash_traverse (link_info.hash, print_one_symbol, i); - - print_dot = (i->output_section->vma + i->output_offset - + TO_ADDR (size)); - } - } -} - -static void -print_fill_statement (lang_fill_statement_type *fill) -{ - size_t size; - unsigned char *p; - fputs (" FILL mask 0x", config.map_file); - for (p = fill->fill->data, size = fill->fill->size; size != 0; p++, size--) - fprintf (config.map_file, "%02x", *p); - fputs ("\n", config.map_file); -} - -static void -print_data_statement (lang_data_statement_type *data) -{ - int i; - bfd_vma addr; - bfd_size_type size; - const char *name; - - init_opb (); - for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++) - print_space (); - - addr = data->output_vma; - if (data->output_section != NULL) - addr += data->output_section->vma; - - switch (data->type) - { - default: - abort (); - case BYTE: - size = BYTE_SIZE; - name = "BYTE"; - break; - case SHORT: - size = SHORT_SIZE; - name = "SHORT"; - break; - case LONG: - size = LONG_SIZE; - name = "LONG"; - break; - case QUAD: - size = QUAD_SIZE; - name = "QUAD"; - break; - case SQUAD: - size = QUAD_SIZE; - name = "SQUAD"; - break; - } - - minfo ("0x%V %W %s 0x%v", addr, size, name, data->value); - - if (data->exp->type.node_class != etree_value) - { - print_space (); - exp_print_tree (data->exp); - } - - print_nl (); - - print_dot = addr + TO_ADDR (size); -} - -/* Print an address statement. These are generated by options like - -Ttext. */ - -static void -print_address_statement (lang_address_statement_type *address) -{ - minfo (_("Address of section %s set to "), address->section_name); - exp_print_tree (address->address); - print_nl (); -} - -/* Print a reloc statement. */ - -static void -print_reloc_statement (lang_reloc_statement_type *reloc) -{ - int i; - bfd_vma addr; - bfd_size_type size; - - init_opb (); - for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++) - print_space (); - - addr = reloc->output_vma; - if (reloc->output_section != NULL) - addr += reloc->output_section->vma; - - size = bfd_get_reloc_size (reloc->howto); - - minfo ("0x%V %W RELOC %s ", addr, size, reloc->howto->name); - - if (reloc->name != NULL) - minfo ("%s+", reloc->name); - else - minfo ("%s+", reloc->section->name); - - exp_print_tree (reloc->addend_exp); - - print_nl (); - - print_dot = addr + TO_ADDR (size); -} - -static void -print_padding_statement (lang_padding_statement_type *s) -{ - int len; - bfd_vma addr; - - init_opb (); - minfo (" *fill*"); - - len = sizeof " *fill*" - 1; - while (len < SECTION_NAME_MAP_LENGTH) - { - print_space (); - ++len; - } - - addr = s->output_offset; - if (s->output_section != NULL) - addr += s->output_section->vma; - minfo ("0x%V %W ", addr, s->size); - - if (s->fill->size != 0) - { - size_t size; - unsigned char *p; - for (p = s->fill->data, size = s->fill->size; size != 0; p++, size--) - fprintf (config.map_file, "%02x", *p); - } - - print_nl (); - - print_dot = addr + TO_ADDR (s->size); -} - -static void -print_wild_statement (lang_wild_statement_type *w, - lang_output_section_statement_type *os) -{ - struct wildcard_list *sec; - - print_space (); - - if (w->filenames_sorted) - minfo ("SORT("); - if (w->filename != NULL) - minfo ("%s", w->filename); - else - minfo ("*"); - if (w->filenames_sorted) - minfo (")"); - - minfo ("("); - for (sec = w->section_list; sec; sec = sec->next) - { - if (sec->spec.sorted) - minfo ("SORT("); - if (sec->spec.exclude_name_list != NULL) - { - name_list *tmp; - minfo ("EXCLUDE_FILE(%s", sec->spec.exclude_name_list->name); - for (tmp = sec->spec.exclude_name_list->next; tmp; tmp = tmp->next) - minfo (" %s", tmp->name); - minfo (") "); - } - if (sec->spec.name != NULL) - minfo ("%s", sec->spec.name); - else - minfo ("*"); - if (sec->spec.sorted) - minfo (")"); - if (sec->next) - minfo (" "); - } - minfo (")"); - - print_nl (); - - print_statement_list (w->children.head, os); -} - -/* Print a group statement. */ - -static void -print_group (lang_group_statement_type *s, - lang_output_section_statement_type *os) -{ - fprintf (config.map_file, "START GROUP\n"); - print_statement_list (s->children.head, os); - fprintf (config.map_file, "END GROUP\n"); -} - -/* Print the list of statements in S. - This can be called for any statement type. */ - -static void -print_statement_list (lang_statement_union_type *s, - lang_output_section_statement_type *os) -{ - while (s != NULL) - { - print_statement (s, os); - s = s->header.next; - } -} - -/* Print the first statement in statement list S. - This can be called for any statement type. */ - -static void -print_statement (lang_statement_union_type *s, - lang_output_section_statement_type *os) -{ - switch (s->header.type) - { - default: - fprintf (config.map_file, _("Fail with %d\n"), s->header.type); - FAIL (); - break; - case lang_constructors_statement_enum: - if (constructor_list.head != NULL) - { - if (constructors_sorted) - minfo (" SORT (CONSTRUCTORS)\n"); - else - minfo (" CONSTRUCTORS\n"); - print_statement_list (constructor_list.head, os); - } - break; - case lang_wild_statement_enum: - print_wild_statement (&s->wild_statement, os); - break; - case lang_address_statement_enum: - print_address_statement (&s->address_statement); - break; - case lang_object_symbols_statement_enum: - minfo (" CREATE_OBJECT_SYMBOLS\n"); - break; - case lang_fill_statement_enum: - print_fill_statement (&s->fill_statement); - break; - case lang_data_statement_enum: - print_data_statement (&s->data_statement); - break; - case lang_reloc_statement_enum: - print_reloc_statement (&s->reloc_statement); - break; - case lang_input_section_enum: - print_input_section (&s->input_section); - break; - case lang_padding_statement_enum: - print_padding_statement (&s->padding_statement); - break; - case lang_output_section_statement_enum: - print_output_section_statement (&s->output_section_statement); - break; - case lang_assignment_statement_enum: - print_assignment (&s->assignment_statement, os); - break; - case lang_target_statement_enum: - fprintf (config.map_file, "TARGET(%s)\n", s->target_statement.target); - break; - case lang_output_statement_enum: - minfo ("OUTPUT(%s", s->output_statement.name); - if (output_target != NULL) - minfo (" %s", output_target); - minfo (")\n"); - break; - case lang_input_statement_enum: - print_input_statement (&s->input_statement); - break; - case lang_group_statement_enum: - print_group (&s->group_statement, os); - break; - case lang_afile_asection_pair_statement_enum: - FAIL (); - break; - } -} - -static void -print_statements (void) -{ - print_statement_list (statement_list.head, abs_output_section); -} - -/* Print the first N statements in statement list S to STDERR. - If N == 0, nothing is printed. - If N < 0, the entire list is printed. - Intended to be called from GDB. */ - -void -dprint_statement (lang_statement_union_type *s, int n) -{ - FILE *map_save = config.map_file; - - config.map_file = stderr; - - if (n < 0) - print_statement_list (s, abs_output_section); - else - { - while (s && --n >= 0) - { - print_statement (s, abs_output_section); - s = s->header.next; - } - } - - config.map_file = map_save; -} - -static void -insert_pad (lang_statement_union_type **ptr, - fill_type *fill, - unsigned int alignment_needed, - asection *output_section, - bfd_vma dot) -{ - static fill_type zero_fill = { 1, { 0 } }; - lang_statement_union_type *pad; - - pad = ((lang_statement_union_type *) - ((char *) ptr - offsetof (lang_statement_union_type, header.next))); - if (ptr != &statement_list.head - && pad->header.type == lang_padding_statement_enum - && pad->padding_statement.output_section == output_section) - { - /* Use the existing pad statement. The above test on output - section is probably redundant, but it doesn't hurt to check. */ - } - else - { - /* Make a new padding statement, linked into existing chain. */ - pad = stat_alloc (sizeof (lang_padding_statement_type)); - pad->header.next = *ptr; - *ptr = pad; - pad->header.type = lang_padding_statement_enum; - pad->padding_statement.output_section = output_section; - if (fill == NULL) - fill = &zero_fill; - pad->padding_statement.fill = fill; - } - pad->padding_statement.output_offset = dot - output_section->vma; - pad->padding_statement.size = alignment_needed; - output_section->_raw_size += alignment_needed; -} - -/* Work out how much this section will move the dot point. */ - -static bfd_vma -size_input_section (lang_statement_union_type **this_ptr, - lang_output_section_statement_type *output_section_statement, - fill_type *fill, - bfd_vma dot) -{ - lang_input_section_type *is = &((*this_ptr)->input_section); - asection *i = is->section; - - if (!is->ifile->just_syms_flag) - { - unsigned int alignment_needed; - asection *o; - - /* Align this section first to the input sections requirement, - then to the output section's requirement. If this alignment - is greater than any seen before, then record it too. Perform - the alignment by inserting a magic 'padding' statement. */ - - if (output_section_statement->subsection_alignment != -1) - i->alignment_power = output_section_statement->subsection_alignment; - - o = output_section_statement->bfd_section; - if (o->alignment_power < i->alignment_power) - o->alignment_power = i->alignment_power; - - alignment_needed = align_power (dot, i->alignment_power) - dot; - - if (alignment_needed != 0) - { - insert_pad (this_ptr, fill, TO_SIZE (alignment_needed), o, dot); - dot += alignment_needed; - } - - /* Remember where in the output section this input section goes. */ - - i->output_offset = dot - o->vma; - - /* Mark how big the output section must be to contain this now. */ - if (i->_cooked_size != 0) - dot += TO_ADDR (i->_cooked_size); - else - dot += TO_ADDR (i->_raw_size); - o->_raw_size = TO_SIZE (dot - o->vma); - } - else - { - i->output_offset = i->vma - output_section_statement->bfd_section->vma; - } - - return dot; -} - -#define IGNORE_SECTION(bfd, s) \ - (((bfd_get_section_flags (bfd, s) & SEC_THREAD_LOCAL) \ - ? ((bfd_get_section_flags (bfd, s) & (SEC_LOAD | SEC_NEVER_LOAD)) \ - != SEC_LOAD) \ - : ((bfd_get_section_flags (bfd, s) & (SEC_ALLOC | SEC_NEVER_LOAD)) \ - != SEC_ALLOC)) \ - || bfd_section_size (bfd, s) == 0) - -/* Check to see if any allocated sections overlap with other allocated - sections. This can happen when the linker script specifically specifies - the output section addresses of the two sections. */ - -static void -lang_check_section_addresses (void) -{ - asection *s; - - /* Scan all sections in the output list. */ - for (s = output_bfd->sections; s != NULL; s = s->next) - { - asection *os; - - /* Ignore sections which are not loaded or which have no contents. */ - if (IGNORE_SECTION (output_bfd, s)) - continue; - - /* Once we reach section 's' stop our seach. This prevents two - warning messages from being produced, one for 'section A overlaps - section B' and one for 'section B overlaps section A'. */ - for (os = output_bfd->sections; os != s; os = os->next) - { - bfd_vma s_start; - bfd_vma s_end; - bfd_vma os_start; - bfd_vma os_end; - - /* Only consider loadable sections with real contents. */ - if (IGNORE_SECTION (output_bfd, os)) - continue; - - /* We must check the sections' LMA addresses not their - VMA addresses because overlay sections can have - overlapping VMAs but they must have distinct LMAs. */ - s_start = bfd_section_lma (output_bfd, s); - os_start = bfd_section_lma (output_bfd, os); - s_end = s_start + TO_ADDR (bfd_section_size (output_bfd, s)) - 1; - os_end = os_start + TO_ADDR (bfd_section_size (output_bfd, os)) - 1; - - /* Look for an overlap. */ - if ((s_end < os_start) || (s_start > os_end)) - continue; - - einfo ( -_("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"), - s->name, s_start, s_end, os->name, os_start, os_end); - - /* Once we have found one overlap for this section, - stop looking for others. */ - break; - } - } -} - -/* Make sure the new address is within the region. We explicitly permit the - current address to be at the exact end of the region when the address is - non-zero, in case the region is at the end of addressable memory and the - calculation wraps around. */ - -static void -os_region_check (lang_output_section_statement_type *os, - lang_memory_region_type *region, - etree_type *tree, - bfd_vma base) -{ - if ((region->current < region->origin - || (region->current - region->origin > region->length)) - && ((region->current != region->origin + region->length) - || base == 0)) - { - if (tree != NULL) - { - einfo (_("%X%P: address 0x%v of %B section %s is not within region %s\n"), - region->current, - os->bfd_section->owner, - os->bfd_section->name, - region->name); - } - else - { - einfo (_("%X%P: region %s is full (%B section %s)\n"), - region->name, - os->bfd_section->owner, - os->bfd_section->name); - } - /* Reset the region pointer. */ - region->current = region->origin; - } -} - -/* Set the sizes for all the output sections. */ - -static bfd_vma -lang_size_sections_1 - (lang_statement_union_type *s, - 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) -{ - /* Size up the sections from their constituent parts. */ - for (; s != NULL; s = s->header.next) - { - switch (s->header.type) - { - case lang_output_section_statement_enum: - { - bfd_vma after; - lang_output_section_statement_type *os; - - os = &s->output_section_statement; - if (os->bfd_section == NULL) - /* This section was never actually created. */ - break; - - /* If this is a COFF shared library section, use the size and - address from the input section. FIXME: This is COFF - specific; it would be cleaner if there were some other way - to do this, but nothing simple comes to mind. */ - if ((os->bfd_section->flags & SEC_COFF_SHARED_LIBRARY) != 0) - { - asection *input; - - if (os->children.head == NULL - || os->children.head->header.next != NULL - || os->children.head->header.type != lang_input_section_enum) - einfo (_("%P%X: Internal error on COFF shared library section %s\n"), - os->name); - - input = os->children.head->input_section.section; - bfd_set_section_vma (os->bfd_section->owner, - os->bfd_section, - bfd_section_vma (input->owner, input)); - os->bfd_section->_raw_size = input->_raw_size; - break; - } - - if (bfd_is_abs_section (os->bfd_section)) - { - /* No matter what happens, an abs section starts at zero. */ - ASSERT (os->bfd_section->vma == 0); - } - else - { - if (os->addr_tree == NULL) - { - /* No address specified for this section, get one - from the region specification. */ - if (os->region == NULL - || (((bfd_get_section_flags (output_bfd, os->bfd_section) - & (SEC_ALLOC | SEC_LOAD)) != 0) - && os->region->name[0] == '*' - && strcmp (os->region->name, DEFAULT_MEMORY_REGION) == 0)) - { - os->region = lang_memory_default (os->bfd_section); - } - - /* If a loadable section is using the default memory - region, and some non default memory regions were - defined, issue an error message. */ - if (!IGNORE_SECTION (output_bfd, os->bfd_section) - && ! link_info.relocatable - && check_regions - && strcmp (os->region->name, DEFAULT_MEMORY_REGION) == 0 - && lang_memory_region_list != NULL - && (strcmp (lang_memory_region_list->name, - DEFAULT_MEMORY_REGION) != 0 - || lang_memory_region_list->next != NULL)) - { - /* By default this is an error rather than just a - warning because if we allocate the section to the - default memory region we can end up creating an - excessively large binary, or even seg faulting when - attempting to perform a negative seek. See - http://sources.redhat.com/ml/binutils/2003-04/msg00423.html - for an example of this. This behaviour can be - overridden by the using the --no-check-sections - switch. */ - if (command_line.check_section_addresses) - einfo (_("%P%F: error: no memory region specified for loadable section `%s'\n"), - bfd_get_section_name (output_bfd, - os->bfd_section)); - else - einfo (_("%P: warning: no memory region specified for loadable section `%s'\n"), - bfd_get_section_name (output_bfd, - os->bfd_section)); - } - - dot = os->region->current; - - if (os->section_alignment == -1) - { - bfd_vma olddot; - - olddot = dot; - dot = align_power (dot, - os->bfd_section->alignment_power); - - if (dot != olddot && config.warn_section_align) - einfo (_("%P: warning: changing start of section %s by %u bytes\n"), - os->name, (unsigned int) (dot - olddot)); - } - } - else - { - etree_value_type r; - - os->processed = -1; - r = exp_fold_tree (os->addr_tree, - abs_output_section, - lang_allocating_phase_enum, - dot, &dot); - os->processed = 0; - - if (!r.valid_p) - einfo (_("%F%S: non constant or forward reference address expression for section %s\n"), - os->name); - - dot = r.value + r.section->bfd_section->vma; - } - - /* The section starts here. - First, align to what the section needs. */ - - if (os->section_alignment != -1) - dot = align_power (dot, os->section_alignment); - - bfd_set_section_vma (0, os->bfd_section, dot); - - os->bfd_section->output_offset = 0; - } - - lang_size_sections_1 (os->children.head, os, &os->children.head, - os->fill, dot, relax, check_regions); - - /* Put the section within the requested block size, or - align at the block boundary. */ - after = ((os->bfd_section->vma - + TO_ADDR (os->bfd_section->_raw_size) - + os->block_value - 1) - & - (bfd_vma) os->block_value); - - if (bfd_is_abs_section (os->bfd_section)) - ASSERT (after == os->bfd_section->vma); - else - os->bfd_section->_raw_size - = TO_SIZE (after - os->bfd_section->vma); - - dot = os->bfd_section->vma; - /* .tbss sections effectively have zero size. */ - if ((os->bfd_section->flags & SEC_HAS_CONTENTS) != 0 - || (os->bfd_section->flags & SEC_THREAD_LOCAL) == 0 - || link_info.relocatable) - dot += TO_ADDR (os->bfd_section->_raw_size); - - os->processed = 1; - - if (os->update_dot_tree != 0) - exp_fold_tree (os->update_dot_tree, abs_output_section, - lang_allocating_phase_enum, dot, &dot); - - /* 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. */ - if (os->region != NULL - && ((bfd_get_section_flags (output_bfd, os->bfd_section) - & SEC_NEVER_LOAD) == 0 - || (bfd_get_section_flags (output_bfd, os->bfd_section) - & (SEC_ALLOC | SEC_LOAD)))) - { - os->region->current = dot; - - if (check_regions) - /* Make sure the new address is within the region. */ - os_region_check (os, os->region, os->addr_tree, - os->bfd_section->vma); - - /* If there's no load address specified, use the run - region as the load region. */ - if (os->lma_region == NULL && os->load_base == NULL) - os->lma_region = os->region; - - if (os->lma_region != NULL && os->lma_region != os->region) - { - /* Set load_base, which will be handled later. */ - os->load_base = exp_intop (os->lma_region->current); - os->lma_region->current += - TO_ADDR (os->bfd_section->_raw_size); - if (check_regions) - os_region_check (os, os->lma_region, NULL, - os->bfd_section->lma); - } - } - } - break; - - case lang_constructors_statement_enum: - dot = lang_size_sections_1 (constructor_list.head, - output_section_statement, - &s->wild_statement.children.head, - fill, dot, relax, check_regions); - break; - - case lang_data_statement_enum: - { - unsigned int size = 0; - - s->data_statement.output_vma = - dot - output_section_statement->bfd_section->vma; - s->data_statement.output_section = - output_section_statement->bfd_section; - - /* We might refer to provided symbols in the expression, and - need to mark them as needed. */ - exp_fold_tree (s->data_statement.exp, abs_output_section, - lang_allocating_phase_enum, dot, &dot); - - switch (s->data_statement.type) - { - default: - abort (); - case QUAD: - case SQUAD: - size = QUAD_SIZE; - break; - case LONG: - size = LONG_SIZE; - break; - case SHORT: - size = SHORT_SIZE; - break; - case BYTE: - size = BYTE_SIZE; - break; - } - if (size < TO_SIZE ((unsigned) 1)) - size = TO_SIZE ((unsigned) 1); - dot += TO_ADDR (size); - output_section_statement->bfd_section->_raw_size += size; - /* The output section gets contents, and then we inspect for - any flags set in the input script which override any ALLOC. */ - output_section_statement->bfd_section->flags |= SEC_HAS_CONTENTS; - if (!(output_section_statement->flags & SEC_NEVER_LOAD)) - { - output_section_statement->bfd_section->flags |= - SEC_ALLOC | SEC_LOAD; - } - } - break; - - case lang_reloc_statement_enum: - { - int size; - - s->reloc_statement.output_vma = - dot - output_section_statement->bfd_section->vma; - s->reloc_statement.output_section = - output_section_statement->bfd_section; - size = bfd_get_reloc_size (s->reloc_statement.howto); - dot += TO_ADDR (size); - output_section_statement->bfd_section->_raw_size += size; - } - break; - - case lang_wild_statement_enum: - - dot = lang_size_sections_1 (s->wild_statement.children.head, - output_section_statement, - &s->wild_statement.children.head, - fill, dot, relax, check_regions); - - break; - - case lang_object_symbols_statement_enum: - link_info.create_object_symbols_section = - output_section_statement->bfd_section; - break; - case lang_output_statement_enum: - case lang_target_statement_enum: - break; - case lang_input_section_enum: - { - asection *i; - - i = (*prev)->input_section.section; - if (! relax) - { - if (i->_cooked_size == 0) - i->_cooked_size = i->_raw_size; - } - else - { - bfd_boolean again; - - if (! bfd_relax_section (i->owner, i, &link_info, &again)) - einfo (_("%P%F: can't relax section: %E\n")); - if (again) - *relax = TRUE; - } - dot = size_input_section (prev, output_section_statement, - output_section_statement->fill, dot); - } - break; - case lang_input_statement_enum: - break; - case lang_fill_statement_enum: - s->fill_statement.output_section = - output_section_statement->bfd_section; - - fill = s->fill_statement.fill; - break; - case lang_assignment_statement_enum: - { - bfd_vma newdot = dot; - - exp_fold_tree (s->assignment_statement.exp, - output_section_statement, - lang_allocating_phase_enum, - dot, - &newdot); - - if (newdot != dot) - { - if (output_section_statement == abs_output_section) - { - /* If we don't have an output section, then just adjust - the default memory address. */ - lang_memory_region_lookup (DEFAULT_MEMORY_REGION, FALSE)->current = newdot; - } - else - { - /* Insert a pad after this statement. We can't - put the pad before when relaxing, in case the - assignment references dot. */ - insert_pad (&s->header.next, fill, TO_SIZE (newdot - dot), - output_section_statement->bfd_section, dot); - - /* Don't neuter the pad below when relaxing. */ - s = s->header.next; - } - - /* 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 | SEC_ALLOC))) - output_section_statement->bfd_section->flags |= SEC_ALLOC; - - dot = newdot; - } - } - break; - - case lang_padding_statement_enum: - /* If this is the first time lang_size_sections is called, - we won't have any padding statements. If this is the - second or later passes when relaxing, we should allow - padding to shrink. If padding is needed on this pass, it - will be added back in. */ - s->padding_statement.size = 0; - - /* Make sure output_offset is valid. If relaxation shrinks - the section and this pad isn't needed, it's possible to - have output_offset larger than the final size of the - section. bfd_set_section_contents will complain even for - a pad size of zero. */ - s->padding_statement.output_offset - = dot - output_section_statement->bfd_section->vma; - break; - - case lang_group_statement_enum: - dot = lang_size_sections_1 (s->group_statement.children.head, - output_section_statement, - &s->group_statement.children.head, - fill, dot, relax, check_regions); - break; - - default: - FAIL (); - break; - - /* We can only get here when relaxing is turned on. */ - case lang_address_statement_enum: - break; - } - prev = &s->header.next; - } - return dot; -} - -bfd_vma -lang_size_sections - (lang_statement_union_type *s, - 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) -{ - bfd_vma result; - asection *o; - - /* Callers of exp_fold_tree need to increment this. */ - lang_statement_iteration++; - - exp_data_seg.phase = exp_dataseg_none; - result = lang_size_sections_1 (s, output_section_statement, prev, fill, - dot, relax, check_regions); - if (exp_data_seg.phase == exp_dataseg_end_seen) - { - /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_END pair was seen, check whether - a page could be saved in the data segment. */ - bfd_vma first, last; - - first = -exp_data_seg.base & (exp_data_seg.pagesize - 1); - last = exp_data_seg.end & (exp_data_seg.pagesize - 1); - if (first && last - && ((exp_data_seg.base & ~(exp_data_seg.pagesize - 1)) - != (exp_data_seg.end & ~(exp_data_seg.pagesize - 1))) - && first + last <= exp_data_seg.pagesize) - { - exp_data_seg.phase = exp_dataseg_adjust; - lang_statement_iteration++; - result = lang_size_sections_1 (s, output_section_statement, prev, - fill, dot, relax, check_regions); - } - } - - /* Some backend relaxers want to refer to the output section size. Give - them a section size that does not change on the next call while they - relax. We can't set this at top because lang_reset_memory_regions - which is called before we get here, sets _raw_size to 0 on relaxing - rounds. */ - for (o = output_bfd->sections; o != NULL; o = o->next) - o->_cooked_size = o->_raw_size; - - return result; -} - -/* 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 *output_section_statement, - fill_type *fill, - bfd_vma dot) -{ - for (; s != NULL; s = s->header.next) - { - switch (s->header.type) - { - case lang_constructors_statement_enum: - dot = lang_do_assignments_1 (constructor_list.head, - output_section_statement, - fill, - dot); - break; - - case lang_output_section_statement_enum: - { - lang_output_section_statement_type *os; - - os = &(s->output_section_statement); - if (os->bfd_section != NULL) - { - dot = os->bfd_section->vma; - lang_do_assignments_1 (os->children.head, os, os->fill, dot); - dot = (os->bfd_section->vma - + TO_ADDR (os->bfd_section->_raw_size)); - - } - if (os->load_base) - { - /* If nothing has been placed into the output section then - it won't have a bfd_section. */ - if (os->bfd_section) - { - os->bfd_section->lma - = exp_get_abs_int (os->load_base, 0, "load base", - lang_final_phase_enum); - } - } - } - break; - case lang_wild_statement_enum: - - dot = lang_do_assignments_1 (s->wild_statement.children.head, - output_section_statement, - fill, dot); - - break; - - case lang_object_symbols_statement_enum: - case lang_output_statement_enum: - case lang_target_statement_enum: -#if 0 - case lang_common_statement_enum: -#endif - break; - case lang_data_statement_enum: - { - etree_value_type value; - - value = exp_fold_tree (s->data_statement.exp, - abs_output_section, - lang_final_phase_enum, dot, &dot); - if (!value.valid_p) - einfo (_("%F%P: invalid data statement\n")); - s->data_statement.value - = value.value + value.section->bfd_section->vma; - } - { - unsigned int size; - switch (s->data_statement.type) - { - default: - abort (); - case QUAD: - case SQUAD: - size = QUAD_SIZE; - break; - case LONG: - size = LONG_SIZE; - break; - case SHORT: - size = SHORT_SIZE; - break; - case BYTE: - size = BYTE_SIZE; - break; - } - if (size < TO_SIZE ((unsigned) 1)) - size = TO_SIZE ((unsigned) 1); - dot += TO_ADDR (size); - } - break; - - case lang_reloc_statement_enum: - { - etree_value_type value; - - value = exp_fold_tree (s->reloc_statement.addend_exp, - abs_output_section, - lang_final_phase_enum, dot, &dot); - s->reloc_statement.addend_value = value.value; - if (!value.valid_p) - einfo (_("%F%P: invalid reloc statement\n")); - } - dot += TO_ADDR (bfd_get_reloc_size (s->reloc_statement.howto)); - break; - - case lang_input_section_enum: - { - asection *in = s->input_section.section; - - if (in->_cooked_size != 0) - dot += TO_ADDR (in->_cooked_size); - else - dot += TO_ADDR (in->_raw_size); - } - break; - - case lang_input_statement_enum: - break; - case lang_fill_statement_enum: - fill = s->fill_statement.fill; - break; - case lang_assignment_statement_enum: - { - exp_fold_tree (s->assignment_statement.exp, - output_section_statement, - lang_final_phase_enum, - dot, - &dot); - } - - break; - case lang_padding_statement_enum: - dot += TO_ADDR (s->padding_statement.size); - break; - - case lang_group_statement_enum: - dot = lang_do_assignments_1 (s->group_statement.children.head, - output_section_statement, - fill, dot); - - break; - - default: - FAIL (); - break; - case lang_address_statement_enum: - break; - } - - } - return dot; -} - -void -lang_do_assignments (lang_statement_union_type *s, - lang_output_section_statement_type *output_section_statement, - fill_type *fill, - bfd_vma dot) -{ - /* Callers of exp_fold_tree need to increment this. */ - lang_statement_iteration++; - lang_do_assignments_1 (s, output_section_statement, fill, dot); -} - -/* Fix any .startof. or .sizeof. symbols. When the assemblers see the - operator .startof. (section_name), it produces an undefined symbol - .startof.section_name. Similarly, when it sees - .sizeof. (section_name), it produces an undefined symbol - .sizeof.section_name. For all the output sections, we look for - such symbols, and set them to the correct value. */ - -static void -lang_set_startof (void) -{ - asection *s; - - if (link_info.relocatable) - return; - - for (s = output_bfd->sections; s != NULL; s = s->next) - { - const char *secname; - char *buf; - struct bfd_link_hash_entry *h; - - secname = bfd_get_section_name (output_bfd, s); - buf = xmalloc (10 + strlen (secname)); - - sprintf (buf, ".startof.%s", secname); - h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE, TRUE); - if (h != NULL && h->type == bfd_link_hash_undefined) - { - h->type = bfd_link_hash_defined; - h->u.def.value = bfd_get_section_vma (output_bfd, s); - h->u.def.section = bfd_abs_section_ptr; - } - - sprintf (buf, ".sizeof.%s", secname); - h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE, TRUE); - if (h != NULL && h->type == bfd_link_hash_undefined) - { - h->type = bfd_link_hash_defined; - if (s->_cooked_size != 0) - h->u.def.value = TO_ADDR (s->_cooked_size); - else - h->u.def.value = TO_ADDR (s->_raw_size); - h->u.def.section = bfd_abs_section_ptr; - } - - free (buf); - } -} - -static void -lang_finish (void) -{ - struct bfd_link_hash_entry *h; - bfd_boolean warn; - - if (link_info.relocatable || link_info.shared) - warn = FALSE; - else - warn = TRUE; - - if (entry_symbol.name == NULL) - { - /* No entry has been specified. Look for start, but don't warn - if we don't find it. */ - entry_symbol.name = "start"; - warn = FALSE; - } - - h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name, - FALSE, FALSE, TRUE); - if (h != NULL - && (h->type == bfd_link_hash_defined - || h->type == bfd_link_hash_defweak) - && h->u.def.section->output_section != NULL) - { - bfd_vma val; - - val = (h->u.def.value - + bfd_get_section_vma (output_bfd, - h->u.def.section->output_section) - + h->u.def.section->output_offset); - if (! bfd_set_start_address (output_bfd, val)) - einfo (_("%P%F:%s: can't set start address\n"), entry_symbol.name); - } - else - { - bfd_vma val; - const char *send; - - /* We couldn't find the entry symbol. Try parsing it as a - number. */ - val = bfd_scan_vma (entry_symbol.name, &send, 0); - if (*send == '\0') - { - if (! bfd_set_start_address (output_bfd, val)) - einfo (_("%P%F: can't set start address\n")); - } - else - { - asection *ts; - - /* Can't find the entry symbol, and it's not a number. Use - the first address in the text section. */ - ts = bfd_get_section_by_name (output_bfd, entry_section); - if (ts != NULL) - { - if (warn) - einfo (_("%P: warning: cannot find entry symbol %s; defaulting to %V\n"), - entry_symbol.name, - bfd_get_section_vma (output_bfd, ts)); - if (! bfd_set_start_address (output_bfd, - bfd_get_section_vma (output_bfd, - ts))) - einfo (_("%P%F: can't set start address\n")); - } - else - { - if (warn) - einfo (_("%P: warning: cannot find entry symbol %s; not setting start address\n"), - entry_symbol.name); - } - } - } - - bfd_hash_table_free (&lang_definedness_table); -} - -/* This is a small function used when we want to ignore errors from - BFD. */ - -static void -ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED, ...) -{ - /* Don't do anything. */ -} - -/* Check that the architecture of all the input files is compatible - with the output file. Also call the backend to let it do any - other checking that is needed. */ - -static void -lang_check (void) -{ - lang_statement_union_type *file; - bfd *input_bfd; - const bfd_arch_info_type *compatible; - - for (file = file_chain.head; file != NULL; file = file->input_statement.next) - { - input_bfd = file->input_statement.the_bfd; - compatible = bfd_arch_get_compatible (input_bfd, output_bfd, - command_line.accept_unknown_input_arch); - - /* In general it is not possible to perform a relocatable - link between differing object formats when the input - file has relocations, because the relocations in the - input format may not have equivalent representations in - the output format (and besides BFD does not translate - relocs for other link purposes than a final link). */ - if ((link_info.relocatable || link_info.emitrelocations) - && (compatible == NULL - || bfd_get_flavour (input_bfd) != bfd_get_flavour (output_bfd)) - && (bfd_get_file_flags (input_bfd) & HAS_RELOC) != 0) - { - einfo (_("%P%F: Relocatable linking with relocations from format %s (%B) to format %s (%B) is not supported\n"), - bfd_get_target (input_bfd), input_bfd, - bfd_get_target (output_bfd), output_bfd); - /* einfo with %F exits. */ - } - - if (compatible == NULL) - { - if (command_line.warn_mismatch) - einfo (_("%P: warning: %s architecture of input file `%B' is incompatible with %s output\n"), - bfd_printable_name (input_bfd), input_bfd, - bfd_printable_name (output_bfd)); - } - else if (bfd_count_sections (input_bfd)) - { - /* If the input bfd has no contents, it shouldn't set the - private data of the output bfd. */ - - bfd_error_handler_type pfn = NULL; - - /* If we aren't supposed to warn about mismatched input - files, temporarily set the BFD error handler to a - function which will do nothing. We still want to call - bfd_merge_private_bfd_data, since it may set up - information which is needed in the output file. */ - if (! command_line.warn_mismatch) - pfn = bfd_set_error_handler (ignore_bfd_errors); - if (! bfd_merge_private_bfd_data (input_bfd, output_bfd)) - { - if (command_line.warn_mismatch) - einfo (_("%P%X: failed to merge target specific data of file %B\n"), - input_bfd); - } - if (! command_line.warn_mismatch) - bfd_set_error_handler (pfn); - } - } -} - -/* Look through all the global common symbols and attach them to the - correct section. The -sort-common command line switch may be used - to roughly sort the entries by size. */ - -static void -lang_common (void) -{ - if (command_line.inhibit_common_definition) - return; - if (link_info.relocatable - && ! command_line.force_common_definition) - return; - - if (! config.sort_common) - bfd_link_hash_traverse (link_info.hash, lang_one_common, NULL); - else - { - int power; - - for (power = 4; power >= 0; power--) - bfd_link_hash_traverse (link_info.hash, lang_one_common, &power); - } -} - -/* Place one common symbol in the correct section. */ - -static bfd_boolean -lang_one_common (struct bfd_link_hash_entry *h, void *info) -{ - unsigned int power_of_two; - bfd_vma size; - asection *section; - - if (h->type != bfd_link_hash_common) - return TRUE; - - size = h->u.c.size; - power_of_two = h->u.c.p->alignment_power; - - if (config.sort_common - && power_of_two < (unsigned int) *(int *) info) - return TRUE; - - section = h->u.c.p->section; - - /* Increase the size of the section to align the common sym. */ - section->_cooked_size += ((bfd_vma) 1 << (power_of_two + opb_shift)) - 1; - section->_cooked_size &= (- (bfd_vma) 1 << (power_of_two + opb_shift)); - - /* Adjust the alignment if necessary. */ - if (power_of_two > section->alignment_power) - section->alignment_power = power_of_two; - - /* Change the symbol from common to defined. */ - h->type = bfd_link_hash_defined; - h->u.def.section = section; - h->u.def.value = section->_cooked_size; - - /* Increase the size of the section. */ - section->_cooked_size += size; - - /* Make sure the section is allocated in memory, and make sure that - it is no longer a common section. */ - section->flags |= SEC_ALLOC; - section->flags &= ~SEC_IS_COMMON; - - if (config.map_file != NULL) - { - static bfd_boolean header_printed; - int len; - char *name; - char buf[50]; - - if (! header_printed) - { - minfo (_("\nAllocating common symbols\n")); - minfo (_("Common symbol size file\n\n")); - header_printed = TRUE; - } - - name = demangle (h->root.string); - minfo ("%s", name); - len = strlen (name); - free (name); - - if (len >= 19) - { - print_nl (); - len = 0; - } - while (len < 20) - { - print_space (); - ++len; - } - - minfo ("0x"); - if (size <= 0xffffffff) - sprintf (buf, "%lx", (unsigned long) size); - else - sprintf_vma (buf, size); - minfo ("%s", buf); - len = strlen (buf); - - while (len < 16) - { - print_space (); - ++len; - } - - minfo ("%B\n", section->owner); - } - - return TRUE; -} - -/* Run through the input files and ensure that every input section has - somewhere to go. If one is found without a destination then create - an input request and place it into the statement tree. */ - -static void -lang_place_orphans (void) -{ - LANG_FOR_EACH_INPUT_STATEMENT (file) - { - asection *s; - - for (s = file->the_bfd->sections; s != NULL; s = s->next) - { - if (s->output_section == NULL) - { - /* This section of the file is not attached, root - around for a sensible place for it to go. */ - - if (file->just_syms_flag) - { - abort (); - } - else if (strcmp (s->name, "COMMON") == 0) - { - /* This is a lonely common section which must have - come from an archive. We attach to the section - with the wildcard. */ - if (! link_info.relocatable - || command_line.force_common_definition) - { - if (default_common_section == NULL) - { -#if 0 - /* This message happens when using the - svr3.ifile linker script, so I have - disabled it. */ - info_msg (_("%P: no [COMMON] command, defaulting to .bss\n")); -#endif - default_common_section = - lang_output_section_statement_lookup (".bss"); - - } - lang_add_section (&default_common_section->children, s, - default_common_section, file); - } - } - else if (ldemul_place_orphan (file, s)) - ; - else - { - lang_output_section_statement_type *os; - - os = lang_output_section_statement_lookup (s->name); - lang_add_section (&os->children, s, os, file); - } - } - } - } -} - -void -lang_set_flags (lang_memory_region_type *ptr, const char *flags, int invert) -{ - flagword *ptr_flags; - - ptr_flags = invert ? &ptr->not_flags : &ptr->flags; - while (*flags) - { - switch (*flags) - { - case 'A': case 'a': - *ptr_flags |= SEC_ALLOC; - break; - - case 'R': case 'r': - *ptr_flags |= SEC_READONLY; - break; - - case 'W': case 'w': - *ptr_flags |= SEC_DATA; - break; - - case 'X': case 'x': - *ptr_flags |= SEC_CODE; - break; - - case 'L': case 'l': - case 'I': case 'i': - *ptr_flags |= SEC_LOAD; - break; - - default: - einfo (_("%P%F: invalid syntax in flags\n")); - break; - } - flags++; - } -} - -/* Call a function on each input file. This function will be called - on an archive, but not on the elements. */ - -void -lang_for_each_input_file (void (*func) (lang_input_statement_type *)) -{ - lang_input_statement_type *f; - - for (f = (lang_input_statement_type *) input_file_chain.head; - f != NULL; - f = (lang_input_statement_type *) f->next_real_file) - func (f); -} - -/* Call a function on each file. The function will be called on all - the elements of an archive which are included in the link, but will - not be called on the archive file itself. */ - -void -lang_for_each_file (void (*func) (lang_input_statement_type *)) -{ - LANG_FOR_EACH_INPUT_STATEMENT (f) - { - func (f); - } -} - -void -ldlang_add_file (lang_input_statement_type *entry) -{ - bfd **pp; - - lang_statement_append (&file_chain, - (lang_statement_union_type *) entry, - &entry->next); - - /* The BFD linker needs to have a list of all input BFDs involved in - a link. */ - ASSERT (entry->the_bfd->link_next == NULL); - ASSERT (entry->the_bfd != output_bfd); - for (pp = &link_info.input_bfds; *pp != NULL; pp = &(*pp)->link_next) - ; - *pp = entry->the_bfd; - entry->the_bfd->usrdata = entry; - bfd_set_gp_size (entry->the_bfd, g_switch_value); - - /* Look through the sections and check for any which should not be - included in the link. We need to do this now, so that we can - notice when the backend linker tries to report multiple - definition errors for symbols which are in sections we aren't - going to link. FIXME: It might be better to entirely ignore - symbols which are defined in sections which are going to be - discarded. This would require modifying the backend linker for - each backend which might set the SEC_LINK_ONCE flag. If we do - this, we should probably handle SEC_EXCLUDE in the same way. */ - - bfd_map_over_sections (entry->the_bfd, section_already_linked, entry); -} - -void -lang_add_output (const char *name, int from_script) -{ - /* Make -o on command line override OUTPUT in script. */ - if (!had_output_filename || !from_script) - { - output_filename = name; - had_output_filename = TRUE; - } -} - -static lang_output_section_statement_type *current_section; - -static int -topower (int x) -{ - unsigned int i = 1; - int l; - - if (x < 0) - return -1; - - for (l = 0; l < 32; l++) - { - if (i >= (unsigned int) x) - return l; - i <<= 1; - } - - return 0; -} - -lang_output_section_statement_type * -lang_enter_output_section_statement (const char *output_section_statement_name, - etree_type *address_exp, - enum section_type sectype, - etree_type *align, - etree_type *subalign, - etree_type *ebase) -{ - lang_output_section_statement_type *os; - - current_section = - os = - lang_output_section_statement_lookup (output_section_statement_name); - - /* Add this statement to tree. */ -#if 0 - add_statement (lang_output_section_statement_enum, - output_section_statement); -#endif - /* Make next things chain into subchain of this. */ - - if (os->addr_tree == NULL) - { - os->addr_tree = address_exp; - } - os->sectype = sectype; - if (sectype != noload_section) - os->flags = SEC_NO_FLAGS; - else - os->flags = SEC_NEVER_LOAD; - os->block_value = 1; - stat_ptr = &os->children; - - os->subsection_alignment = - topower (exp_get_value_int (subalign, -1, "subsection alignment", 0)); - os->section_alignment = - topower (exp_get_value_int (align, -1, "section alignment", 0)); - - os->load_base = ebase; - return os; -} - -void -lang_final (void) -{ - lang_output_statement_type *new = - new_stat (lang_output_statement, stat_ptr); - - new->name = output_filename; -} - -/* Reset the current counters in the regions. */ - -void -lang_reset_memory_regions (void) -{ - lang_memory_region_type *p = lang_memory_region_list; - asection *o; - - for (p = lang_memory_region_list; p != NULL; p = p->next) - { - p->old_length = (bfd_size_type) (p->current - p->origin); - p->current = p->origin; - } - - for (o = output_bfd->sections; o != NULL; o = o->next) - o->_raw_size = 0; -} - -/* If the wild pattern was marked KEEP, the member sections - should be as well. */ - -static void -gc_section_callback (lang_wild_statement_type *ptr, - struct wildcard_list *sec ATTRIBUTE_UNUSED, - asection *section, - lang_input_statement_type *file ATTRIBUTE_UNUSED, - void *data ATTRIBUTE_UNUSED) -{ - if (ptr->keep_sections) - section->flags |= SEC_KEEP; -} - -/* Handle a wild statement, marking it against GC. */ - -static void -lang_gc_wild (lang_wild_statement_type *s) -{ - walk_wild (s, gc_section_callback, NULL); -} - -/* Iterate over sections marking them against GC. */ - -static void -lang_gc_sections_1 (lang_statement_union_type *s) -{ - for (; s != NULL; s = s->header.next) - { - switch (s->header.type) - { - case lang_wild_statement_enum: - lang_gc_wild (&s->wild_statement); - break; - case lang_constructors_statement_enum: - lang_gc_sections_1 (constructor_list.head); - break; - case lang_output_section_statement_enum: - lang_gc_sections_1 (s->output_section_statement.children.head); - break; - case lang_group_statement_enum: - lang_gc_sections_1 (s->group_statement.children.head); - break; - default: - break; - } - } -} - -static void -lang_gc_sections (void) -{ - struct bfd_link_hash_entry *h; - ldlang_undef_chain_list_type *ulist; - - /* Keep all sections so marked in the link script. */ - - lang_gc_sections_1 (statement_list.head); - - /* Keep all sections containing symbols undefined on the command-line, - and the section containing the entry symbol. */ - - for (ulist = link_info.gc_sym_list; ulist; ulist = ulist->next) - { - h = bfd_link_hash_lookup (link_info.hash, ulist->name, - FALSE, FALSE, FALSE); - - if (h != NULL - && (h->type == bfd_link_hash_defined - || h->type == bfd_link_hash_defweak) - && ! bfd_is_abs_section (h->u.def.section)) - { - h->u.def.section->flags |= SEC_KEEP; - } - } - - bfd_gc_sections (output_bfd, &link_info); -} - -void -lang_process (void) -{ - lang_reasonable_defaults (); - current_target = default_target; - - /* Open the output file. */ - lang_for_each_statement (ldlang_open_output); - init_opb (); - - ldemul_create_output_section_statements (); - - /* Add to the hash table all undefineds on the command line. */ - lang_place_undefineds (); - - already_linked_table_init (); - - /* Create a bfd for each input file. */ - current_target = default_target; - open_input_bfds (statement_list.head, FALSE); - - link_info.gc_sym_list = &entry_symbol; - if (entry_symbol.name == NULL) - link_info.gc_sym_list = ldlang_undef_chain_list_head; - - ldemul_after_open (); - - already_linked_table_free (); - - /* Make sure that we're not mixing architectures. We call this - after all the input files have been opened, but before we do any - other processing, so that any operations merge_private_bfd_data - does on the output file will be known during the rest of the - link. */ - lang_check (); - - /* Handle .exports instead of a version script if we're told to do so. */ - if (command_line.version_exports_section) - lang_do_version_exports_section (); - - /* Build all sets based on the information gathered from the input - files. */ - ldctor_build_sets (); - - /* Remove unreferenced sections if asked to. */ - if (command_line.gc_sections) - lang_gc_sections (); - - /* If there were any SEC_MERGE sections, finish their merging, so that - section sizes can be computed. This has to be done after GC of sections, - so that GCed sections are not merged, but before assigning output - sections, since removing whole input sections is hard then. */ - bfd_merge_sections (output_bfd, &link_info); - - /* Size up the common data. */ - lang_common (); - - /* Run through the contours of the script and attach input sections - to the correct output sections. */ - map_input_to_output_sections (statement_list.head, NULL, NULL); - - /* Find any sections not attached explicitly and handle them. */ - lang_place_orphans (); - - if (! link_info.relocatable) - { - /* Look for a text section and set the readonly attribute in it. */ - asection *found = bfd_get_section_by_name (output_bfd, ".text"); - - if (found != NULL) - { - if (config.text_read_only) - found->flags |= SEC_READONLY; - else - found->flags &= ~SEC_READONLY; - } - } - - /* Do anything special before sizing sections. This is where ELF - and other back-ends size dynamic sections. */ - ldemul_before_allocation (); - - if (!link_info.relocatable) - strip_excluded_output_sections (); - - /* We must record the program headers before we try to fix the - section positions, since they will affect SIZEOF_HEADERS. */ - lang_record_phdrs (); - - /* Size up the sections. */ - lang_size_sections (statement_list.head, abs_output_section, - &statement_list.head, 0, 0, NULL, - command_line.relax ? FALSE : TRUE); - - /* Now run around and relax if we can. */ - if (command_line.relax) - { - /* Keep relaxing until bfd_relax_section gives up. */ - bfd_boolean relax_again; - - do - { - relax_again = FALSE; - - /* Note: pe-dll.c does something like this also. If you find - you need to change this code, you probably need to change - pe-dll.c also. DJ */ - - /* Do all the assignments with our current guesses as to - section sizes. */ - lang_do_assignments (statement_list.head, abs_output_section, - NULL, 0); - - /* We must do this after lang_do_assignments, because it uses - _raw_size. */ - lang_reset_memory_regions (); - - /* Perform another relax pass - this time we know where the - globals are, so can make a better guess. */ - lang_size_sections (statement_list.head, abs_output_section, - &statement_list.head, 0, 0, &relax_again, FALSE); - - /* If the normal relax is done and the relax finalize pass - is not performed yet, we perform another relax pass. */ - if (!relax_again && link_info.need_relax_finalize) - { - link_info.need_relax_finalize = FALSE; - relax_again = TRUE; - } - } - while (relax_again); - - /* Final extra sizing to report errors. */ - lang_do_assignments (statement_list.head, abs_output_section, NULL, 0); - lang_reset_memory_regions (); - lang_size_sections (statement_list.head, abs_output_section, - &statement_list.head, 0, 0, NULL, TRUE); - } - - /* See if anything special should be done now we know how big - everything is. */ - ldemul_after_allocation (); - - /* Fix any .startof. or .sizeof. symbols. */ - lang_set_startof (); - - /* Do all the assignments, now that we know the final resting places - of all the symbols. */ - - lang_do_assignments (statement_list.head, abs_output_section, NULL, 0); - - /* Make sure that the section addresses make sense. */ - if (! link_info.relocatable - && command_line.check_section_addresses) - lang_check_section_addresses (); - - /* Final stuffs. */ - - ldemul_finish (); - lang_finish (); -} - -/* EXPORTED TO YACC */ - -void -lang_add_wild (struct wildcard_spec *filespec, - struct wildcard_list *section_list, - bfd_boolean keep_sections) -{ - struct wildcard_list *curr, *next; - lang_wild_statement_type *new; - - /* Reverse the list as the parser puts it back to front. */ - for (curr = section_list, section_list = NULL; - curr != NULL; - section_list = curr, curr = next) - { - if (curr->spec.name != NULL && strcmp (curr->spec.name, "COMMON") == 0) - placed_commons = TRUE; - - next = curr->next; - curr->next = section_list; - } - - if (filespec != NULL && filespec->name != NULL) - { - if (strcmp (filespec->name, "*") == 0) - filespec->name = NULL; - else if (! wildcardp (filespec->name)) - lang_has_input_file = TRUE; - } - - new = new_stat (lang_wild_statement, stat_ptr); - new->filename = NULL; - new->filenames_sorted = FALSE; - if (filespec != NULL) - { - new->filename = filespec->name; - new->filenames_sorted = filespec->sorted; - } - new->section_list = section_list; - new->keep_sections = keep_sections; - lang_list_init (&new->children); -} - -void -lang_section_start (const char *name, etree_type *address) -{ - lang_address_statement_type *ad; - - ad = new_stat (lang_address_statement, stat_ptr); - ad->section_name = name; - ad->address = address; -} - -/* Set the start symbol to NAME. CMDLINE is nonzero if this is called - because of a -e argument on the command line, or zero if this is - called by ENTRY in a linker script. Command line arguments take - precedence. */ - -void -lang_add_entry (const char *name, bfd_boolean cmdline) -{ - if (entry_symbol.name == NULL - || cmdline - || ! entry_from_cmdline) - { - entry_symbol.name = name; - entry_from_cmdline = cmdline; - } -} - -void -lang_add_target (const char *name) -{ - lang_target_statement_type *new = new_stat (lang_target_statement, - stat_ptr); - - new->target = name; - -} - -void -lang_add_map (const char *name) -{ - while (*name) - { - switch (*name) - { - case 'F': - map_option_f = TRUE; - break; - } - name++; - } -} - -void -lang_add_fill (fill_type *fill) -{ - lang_fill_statement_type *new = new_stat (lang_fill_statement, - stat_ptr); - - new->fill = fill; -} - -void -lang_add_data (int type, union etree_union *exp) -{ - - lang_data_statement_type *new = new_stat (lang_data_statement, - stat_ptr); - - new->exp = exp; - new->type = type; - -} - -/* Create a new reloc statement. RELOC is the BFD relocation type to - generate. HOWTO is the corresponding howto structure (we could - look this up, but the caller has already done so). SECTION is the - section to generate a reloc against, or NAME is the name of the - symbol to generate a reloc against. Exactly one of SECTION and - NAME must be NULL. ADDEND is an expression for the addend. */ - -void -lang_add_reloc (bfd_reloc_code_real_type reloc, - reloc_howto_type *howto, - asection *section, - const char *name, - union etree_union *addend) -{ - lang_reloc_statement_type *p = new_stat (lang_reloc_statement, stat_ptr); - - p->reloc = reloc; - p->howto = howto; - p->section = section; - p->name = name; - p->addend_exp = addend; - - p->addend_value = 0; - p->output_section = NULL; - p->output_vma = 0; -} - -lang_assignment_statement_type * -lang_add_assignment (etree_type *exp) -{ - lang_assignment_statement_type *new = new_stat (lang_assignment_statement, - stat_ptr); - - new->exp = exp; - return new; -} - -void -lang_add_attribute (enum statement_enum attribute) -{ - new_statement (attribute, sizeof (lang_statement_union_type), stat_ptr); -} - -void -lang_startup (const char *name) -{ - if (startup_file != NULL) - { - einfo (_("%P%Fmultiple STARTUP files\n")); - } - first_file->filename = name; - first_file->local_sym_name = name; - first_file->real = TRUE; - - startup_file = name; -} - -void -lang_float (bfd_boolean maybe) -{ - lang_float_flag = maybe; -} - - -/* Work out the load- and run-time regions from a script statement, and - store them in *LMA_REGION and *REGION respectively. - - MEMSPEC is the name of the run-time region, or the value of - DEFAULT_MEMORY_REGION if the statement didn't specify one. - LMA_MEMSPEC is the name of the load-time region, or null if the - statement didn't specify one.HAVE_LMA_P is TRUE if the statement - had an explicit load address. - - It is an error to specify both a load region and a load address. */ - -static void -lang_get_regions (lang_memory_region_type **region, - lang_memory_region_type **lma_region, - const char *memspec, - const char *lma_memspec, - bfd_boolean have_lma, - bfd_boolean have_vma) -{ - *lma_region = lang_memory_region_lookup (lma_memspec, FALSE); - - /* If no runtime region or VMA has been specified, but the load region has - been specified, then use the load region for the runtime region as well. */ - if (lma_memspec != NULL - && ! have_vma - && strcmp (memspec, DEFAULT_MEMORY_REGION) == 0) - *region = *lma_region; - else - *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")); -} - -void -lang_leave_output_section_statement (fill_type *fill, const char *memspec, - lang_output_section_phdr_list *phdrs, - const char *lma_memspec) -{ - lang_get_regions (¤t_section->region, - ¤t_section->lma_region, - memspec, lma_memspec, - current_section->load_base != NULL, - current_section->addr_tree != NULL); - current_section->fill = fill; - current_section->phdrs = phdrs; - stat_ptr = &statement_list; -} - -/* 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 (output_bfd, secname); - if (sec == NULL) - h->u.def.value = 0; - else - h->u.def.value = bfd_get_section_vma (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 (output_bfd, secname); - if (sec == NULL) - h->u.def.value = 0; - else - h->u.def.value = (bfd_get_section_vma (output_bfd, sec) - + TO_ADDR (bfd_section_size (output_bfd, sec))); - - h->u.def.section = bfd_abs_section_ptr; - } -} - -void -lang_statement_append (lang_statement_list_type *list, - lang_statement_union_type *element, - lang_statement_union_type **field) -{ - *(list->tail) = element; - list->tail = field; -} - -/* Set the output format type. -oformat overrides scripts. */ - -void -lang_add_output_format (const char *format, - const char *big, - const char *little, - int from_script) -{ - if (output_target == NULL || !from_script) - { - if (command_line.endian == ENDIAN_BIG - && big != NULL) - format = big; - else if (command_line.endian == ENDIAN_LITTLE - && little != NULL) - format = little; - - output_target = format; - } -} - -/* Enter a group. This creates a new lang_group_statement, and sets - stat_ptr to build new statements within the group. */ - -void -lang_enter_group (void) -{ - lang_group_statement_type *g; - - g = new_stat (lang_group_statement, stat_ptr); - lang_list_init (&g->children); - stat_ptr = &g->children; -} - -/* Leave a group. This just resets stat_ptr to start writing to the - regular list of statements again. Note that this will not work if - groups can occur inside anything else which can adjust stat_ptr, - but currently they can't. */ - -void -lang_leave_group (void) -{ - stat_ptr = &statement_list; -} - -/* Add a new program header. This is called for each entry in a PHDRS - command in a linker script. */ - -void -lang_new_phdr (const char *name, - etree_type *type, - bfd_boolean filehdr, - bfd_boolean phdrs, - etree_type *at, - etree_type *flags) -{ - struct lang_phdr *n, **pp; - - n = stat_alloc (sizeof (struct lang_phdr)); - n->next = NULL; - n->name = name; - n->type = exp_get_value_int (type, 0, "program header type", - lang_final_phase_enum); - n->filehdr = filehdr; - n->phdrs = phdrs; - n->at = at; - n->flags = flags; - - for (pp = &lang_phdr_list; *pp != NULL; pp = &(*pp)->next) - ; - *pp = n; -} - -/* Record the program header information in the output BFD. FIXME: We - should not be calling an ELF specific function here. */ - -static void -lang_record_phdrs (void) -{ - unsigned int alc; - asection **secs; - lang_output_section_phdr_list *last; - struct lang_phdr *l; - lang_statement_union_type *u; - - alc = 10; - secs = xmalloc (alc * sizeof (asection *)); - last = NULL; - for (l = lang_phdr_list; l != NULL; l = l->next) - { - unsigned int c; - flagword flags; - bfd_vma at; - - c = 0; - for (u = lang_output_section_statement.head; - u != NULL; - u = u->output_section_statement.next) - { - lang_output_section_statement_type *os; - lang_output_section_phdr_list *pl; - - os = &u->output_section_statement; - - pl = os->phdrs; - if (pl != NULL) - last = pl; - else - { - if (os->sectype == noload_section - || os->bfd_section == NULL - || (os->bfd_section->flags & SEC_ALLOC) == 0) - continue; - pl = last; - } - - if (os->bfd_section == NULL) - continue; - - for (; pl != NULL; pl = pl->next) - { - if (strcmp (pl->name, l->name) == 0) - { - if (c >= alc) - { - alc *= 2; - secs = xrealloc (secs, alc * sizeof (asection *)); - } - secs[c] = os->bfd_section; - ++c; - pl->used = TRUE; - } - } - } - - if (l->flags == NULL) - flags = 0; - else - flags = exp_get_vma (l->flags, 0, "phdr flags", - lang_final_phase_enum); - - if (l->at == NULL) - at = 0; - else - at = exp_get_vma (l->at, 0, "phdr load address", - lang_final_phase_enum); - - if (! bfd_record_phdr (output_bfd, l->type, - l->flags != NULL, flags, l->at != NULL, - at, l->filehdr, l->phdrs, c, secs)) - einfo (_("%F%P: bfd_record_phdr failed: %E\n")); - } - - free (secs); - - /* Make sure all the phdr assignments succeeded. */ - for (u = lang_output_section_statement.head; - u != NULL; - u = u->output_section_statement.next) - { - lang_output_section_phdr_list *pl; - - if (u->output_section_statement.bfd_section == NULL) - continue; - - for (pl = u->output_section_statement.phdrs; - pl != NULL; - pl = pl->next) - if (! pl->used && strcmp (pl->name, "NONE") != 0) - einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"), - u->output_section_statement.name, pl->name); - } -} - -/* Record a list of sections which may not be cross referenced. */ - -void -lang_add_nocrossref (lang_nocrossref_type *l) -{ - struct lang_nocrossrefs *n; - - n = xmalloc (sizeof *n); - n->next = nocrossref_list; - n->list = l; - nocrossref_list = n; - - /* Set notice_all so that we get informed about all symbols. */ - link_info.notice_all = TRUE; -} - -/* Overlay handling. We handle overlays with some static variables. */ - -/* The overlay virtual address. */ -static etree_type *overlay_vma; -/* And subsection alignment. */ -static etree_type *overlay_subalign; - -/* An expression for the maximum section size seen so far. */ -static etree_type *overlay_max; - -/* A list of all the sections in this overlay. */ - -struct overlay_list { - struct overlay_list *next; - lang_output_section_statement_type *os; -}; - -static struct overlay_list *overlay_list; - -/* Start handling an overlay. */ - -void -lang_enter_overlay (etree_type *vma_expr, etree_type *subalign) -{ - /* The grammar should prevent nested overlays from occurring. */ - ASSERT (overlay_vma == NULL - && overlay_subalign == NULL - && overlay_max == NULL); - - overlay_vma = vma_expr; - overlay_subalign = subalign; -} - -/* Start a section in an overlay. We handle this by calling - lang_enter_output_section_statement with the correct VMA. - lang_leave_overlay sets up the LMA and memory regions. */ - -void -lang_enter_overlay_section (const char *name) -{ - struct overlay_list *n; - etree_type *size; - - lang_enter_output_section_statement (name, overlay_vma, normal_section, - 0, overlay_subalign, 0); - - /* If this is the first section, then base the VMA of future - sections on this one. This will work correctly even if `.' is - used in the addresses. */ - if (overlay_list == NULL) - overlay_vma = exp_nameop (ADDR, name); - - /* Remember the section. */ - n = xmalloc (sizeof *n); - n->os = current_section; - n->next = overlay_list; - overlay_list = n; - - size = exp_nameop (SIZEOF, name); - - /* Arrange to work out the maximum section end address. */ - if (overlay_max == NULL) - overlay_max = size; - else - overlay_max = exp_binop (MAX_K, overlay_max, size); -} - -/* Finish a section in an overlay. There isn't any special to do - here. */ - -void -lang_leave_overlay_section (fill_type *fill, - lang_output_section_phdr_list *phdrs) -{ - const char *name; - char *clean, *s2; - const char *s1; - char *buf; - - name = current_section->name; - - /* For now, assume that DEFAULT_MEMORY_REGION is the run-time memory - region and that no load-time region has been specified. It doesn't - really matter what we say here, since lang_leave_overlay will - override it. */ - lang_leave_output_section_statement (fill, DEFAULT_MEMORY_REGION, phdrs, 0); - - /* Define the magic symbols. */ - - clean = xmalloc (strlen (name) + 1); - s2 = clean; - for (s1 = name; *s1 != '\0'; s1++) - if (ISALNUM (*s1) || *s1 == '_') - *s2++ = *s1; - *s2 = '\0'; - - buf = xmalloc (strlen (clean) + sizeof "__load_start_"); - sprintf (buf, "__load_start_%s", clean); - lang_add_assignment (exp_assop ('=', buf, - exp_nameop (LOADADDR, name))); - - buf = xmalloc (strlen (clean) + sizeof "__load_stop_"); - sprintf (buf, "__load_stop_%s", clean); - lang_add_assignment (exp_assop ('=', buf, - exp_binop ('+', - exp_nameop (LOADADDR, name), - exp_nameop (SIZEOF, name)))); - - free (clean); -} - -/* Finish an overlay. If there are any overlay wide settings, this - looks through all the sections in the overlay and sets them. */ - -void -lang_leave_overlay (etree_type *lma_expr, - int nocrossrefs, - fill_type *fill, - const char *memspec, - lang_output_section_phdr_list *phdrs, - const char *lma_memspec) -{ - lang_memory_region_type *region; - lang_memory_region_type *lma_region; - struct overlay_list *l; - lang_nocrossref_type *nocrossref; - - lang_get_regions (®ion, &lma_region, - memspec, lma_memspec, - lma_expr != NULL, FALSE); - - nocrossref = NULL; - - /* 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)); - - l = overlay_list; - while (l != NULL) - { - struct overlay_list *next; - - if (fill != NULL && l->os->fill == NULL) - l->os->fill = fill; - - l->os->region = region; - l->os->lma_region = lma_region; - - /* The first section has the load address specified in the - OVERLAY statement. The rest are worked out from that. - The base address is not needed (and should be null) if - an LMA region was specified. */ - if (l->next == 0) - l->os->load_base = lma_expr; - else if (lma_region == 0) - l->os->load_base = exp_binop ('+', - exp_nameop (LOADADDR, l->next->os->name), - exp_nameop (SIZEOF, l->next->os->name)); - - if (phdrs != NULL && l->os->phdrs == NULL) - l->os->phdrs = phdrs; - - if (nocrossrefs) - { - lang_nocrossref_type *nc; - - nc = xmalloc (sizeof *nc); - nc->name = l->os->name; - nc->next = nocrossref; - nocrossref = nc; - } - - next = l->next; - free (l); - l = next; - } - - if (nocrossref != NULL) - lang_add_nocrossref (nocrossref); - - overlay_vma = NULL; - overlay_list = NULL; - overlay_max = NULL; -} - -/* 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). */ - -static struct bfd_elf_version_expr * -lang_vers_match (struct bfd_elf_version_expr_head *head, - struct bfd_elf_version_expr *prev, - const char *sym) -{ - const char *cxx_sym = sym; - const char *java_sym = sym; - struct bfd_elf_version_expr *expr = NULL; - - if (head->mask & BFD_ELF_VERSION_CXX_TYPE) - { - cxx_sym = cplus_demangle (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); - if (!java_sym) - java_sym = sym; - } - - if (head->htab && (prev == NULL || prev->symbol)) - { - struct bfd_elf_version_expr e; - - switch (prev ? prev->mask : 0) - { - case 0: - if (head->mask & BFD_ELF_VERSION_C_TYPE) - { - e.symbol = sym; - expr = htab_find (head->htab, &e); - while (expr && strcmp (expr->symbol, sym) == 0) - if (expr->mask == BFD_ELF_VERSION_C_TYPE) - goto out_ret; - else - expr = expr->next; - } - /* Fallthrough */ - case BFD_ELF_VERSION_C_TYPE: - if (head->mask & BFD_ELF_VERSION_CXX_TYPE) - { - e.symbol = cxx_sym; - expr = htab_find (head->htab, &e); - while (expr && strcmp (expr->symbol, cxx_sym) == 0) - if (expr->mask == BFD_ELF_VERSION_CXX_TYPE) - goto out_ret; - else - expr = expr->next; - } - /* Fallthrough */ - case BFD_ELF_VERSION_CXX_TYPE: - if (head->mask & BFD_ELF_VERSION_JAVA_TYPE) - { - e.symbol = java_sym; - expr = htab_find (head->htab, &e); - while (expr && strcmp (expr->symbol, java_sym) == 0) - if (expr->mask == BFD_ELF_VERSION_JAVA_TYPE) - goto out_ret; - else - expr = expr->next; - } - /* Fallthrough */ - default: - break; - } - } - - /* Finally, try the wildcards. */ - if (prev == NULL || prev->symbol) - expr = head->remaining; - else - expr = prev->next; - while (expr) - { - const char *s; - - if (expr->pattern[0] == '*' && expr->pattern[1] == '\0') - break; - - if (expr->mask == BFD_ELF_VERSION_JAVA_TYPE) - s = java_sym; - else if (expr->mask == BFD_ELF_VERSION_CXX_TYPE) - s = cxx_sym; - else - s = sym; - if (fnmatch (expr->pattern, s, 0) == 0) - break; - expr = expr->next; - } - -out_ret: - if (cxx_sym != sym) - free ((char *) cxx_sym); - if (java_sym != sym) - free ((char *) java_sym); - return expr; -} - -/* Return NULL if the PATTERN argument is a glob pattern, otherwise, - return a string pointing to the symbol name. */ - -static const char * -realsymbol (const char *pattern) -{ - const char *p; - bfd_boolean changed = FALSE, backslash = FALSE; - char *s, *symbol = xmalloc (strlen (pattern) + 1); - - for (p = pattern, s = symbol; *p != '\0'; ++p) - { - /* It is a glob pattern only if there is no preceding - backslash. */ - if (! backslash && (*p == '?' || *p == '*' || *p == '[')) - { - free (symbol); - return NULL; - } - - if (backslash) - { - /* Remove the preceding backslash. */ - *(s - 1) = *p; - changed = TRUE; - } - else - *s++ = *p; - - backslash = *p == '\\'; - } - - if (changed) - { - *s = '\0'; - return symbol; - } - else - { - free (symbol); - return pattern; - } -} - -/* This is called for each variable name or match expression. */ - -struct bfd_elf_version_expr * -lang_new_vers_pattern (struct bfd_elf_version_expr *orig, - const char *new, - const char *lang) -{ - struct bfd_elf_version_expr *ret; - - ret = xmalloc (sizeof *ret); - ret->next = orig; - ret->pattern = new; - ret->symver = 0; - ret->script = 0; - ret->symbol = realsymbol (new); - - if (lang == NULL || strcasecmp (lang, "C") == 0) - ret->mask = BFD_ELF_VERSION_C_TYPE; - else if (strcasecmp (lang, "C++") == 0) - ret->mask = BFD_ELF_VERSION_CXX_TYPE; - else if (strcasecmp (lang, "Java") == 0) - ret->mask = BFD_ELF_VERSION_JAVA_TYPE; - else - { - einfo (_("%X%P: unknown language `%s' in version information\n"), - lang); - ret->mask = BFD_ELF_VERSION_C_TYPE; - } - - return ldemul_new_vers_pattern (ret); -} - -/* This is called for each set of variable names and match - expressions. */ - -struct bfd_elf_version_tree * -lang_new_vers_node (struct bfd_elf_version_expr *globals, - struct bfd_elf_version_expr *locals) -{ - struct bfd_elf_version_tree *ret; - - ret = xcalloc (1, sizeof *ret); - ret->globals.list = globals; - ret->locals.list = locals; - ret->match = lang_vers_match; - ret->name_indx = (unsigned int) -1; - return ret; -} - -/* This static variable keeps track of version indices. */ - -static int version_index; - -static hashval_t -version_expr_head_hash (const void *p) -{ - const struct bfd_elf_version_expr *e = p; - - return htab_hash_string (e->symbol); -} - -static int -version_expr_head_eq (const void *p1, const void *p2) -{ - const struct bfd_elf_version_expr *e1 = p1; - const struct bfd_elf_version_expr *e2 = p2; - - return strcmp (e1->symbol, e2->symbol) == 0; -} - -static void -lang_finalize_version_expr_head (struct bfd_elf_version_expr_head *head) -{ - size_t count = 0; - struct bfd_elf_version_expr *e, *next; - struct bfd_elf_version_expr **list_loc, **remaining_loc; - - for (e = head->list; e; e = e->next) - { - if (e->symbol) - count++; - head->mask |= e->mask; - } - - if (count) - { - head->htab = htab_create (count * 2, version_expr_head_hash, - version_expr_head_eq, NULL); - list_loc = &head->list; - remaining_loc = &head->remaining; - for (e = head->list; e; e = next) - { - next = e->next; - if (!e->symbol) - { - *remaining_loc = e; - remaining_loc = &e->next; - } - else - { - void **loc = htab_find_slot (head->htab, e, INSERT); - - if (*loc) - { - struct bfd_elf_version_expr *e1, *last; - - e1 = *loc; - last = NULL; - do - { - if (e1->mask == e->mask) - { - last = NULL; - break; - } - last = e1; - e1 = e1->next; - } - while (e1 && strcmp (e1->symbol, e->symbol) == 0); - - if (last == NULL) - { - /* This is a duplicate. */ - /* FIXME: Memory leak. Sometimes pattern is not - xmalloced alone, but in larger chunk of memory. */ - /* free (e->symbol); */ - free (e); - } - else - { - e->next = last->next; - last->next = e; - } - } - else - { - *loc = e; - *list_loc = e; - list_loc = &e->next; - } - } - } - *remaining_loc = NULL; - *list_loc = head->remaining; - } - else - head->remaining = head->list; -} - -/* This is called when we know the name and dependencies of the - version. */ - -void -lang_register_vers_node (const char *name, - struct bfd_elf_version_tree *version, - struct bfd_elf_version_deps *deps) -{ - struct bfd_elf_version_tree *t, **pp; - struct bfd_elf_version_expr *e1; - - if (name == NULL) - name = ""; - - if ((name[0] == '\0' && lang_elf_version_info != NULL) - || (lang_elf_version_info && lang_elf_version_info->name[0] == '\0')) - { - einfo (_("%X%P: anonymous version tag cannot be combined with other version tags\n")); - free (version); - return; - } - - /* Make sure this node has a unique name. */ - for (t = lang_elf_version_info; t != NULL; t = t->next) - if (strcmp (t->name, name) == 0) - einfo (_("%X%P: duplicate version tag `%s'\n"), name); - - lang_finalize_version_expr_head (&version->globals); - lang_finalize_version_expr_head (&version->locals); - - /* Check the global and local match names, and make sure there - aren't any duplicates. */ - - for (e1 = version->globals.list; e1 != NULL; e1 = e1->next) - { - for (t = lang_elf_version_info; t != NULL; t = t->next) - { - struct bfd_elf_version_expr *e2; - - if (t->locals.htab && e1->symbol) - { - e2 = htab_find (t->locals.htab, e1); - while (e2 && strcmp (e1->symbol, e2->symbol) == 0) - { - if (e1->mask == e2->mask) - einfo (_("%X%P: duplicate expression `%s' in version information\n"), - e1->symbol); - e2 = e2->next; - } - } - else if (!e1->symbol) - for (e2 = t->locals.remaining; e2 != NULL; e2 = e2->next) - if (strcmp (e1->pattern, e2->pattern) == 0 && e1->mask == e2->mask) - einfo (_("%X%P: duplicate expression `%s' in version information\n"), - e1->pattern); - } - } - - for (e1 = version->locals.list; e1 != NULL; e1 = e1->next) - { - for (t = lang_elf_version_info; t != NULL; t = t->next) - { - struct bfd_elf_version_expr *e2; - - if (t->globals.htab && e1->symbol) - { - e2 = htab_find (t->globals.htab, e1); - while (e2 && strcmp (e1->symbol, e2->symbol) == 0) - { - if (e1->mask == e2->mask) - einfo (_("%X%P: duplicate expression `%s' in version information\n"), - e1->symbol); - e2 = e2->next; - } - } - else if (!e1->symbol) - for (e2 = t->globals.remaining; e2 != NULL; e2 = e2->next) - if (strcmp (e1->pattern, e2->pattern) == 0 && e1->mask == e2->mask) - einfo (_("%X%P: duplicate expression `%s' in version information\n"), - e1->pattern); - } - } - - version->deps = deps; - version->name = name; - if (name[0] != '\0') - { - ++version_index; - version->vernum = version_index; - } - else - version->vernum = 0; - - for (pp = &lang_elf_version_info; *pp != NULL; pp = &(*pp)->next) - ; - *pp = version; -} - -/* This is called when we see a version dependency. */ - -struct bfd_elf_version_deps * -lang_add_vers_depend (struct bfd_elf_version_deps *list, const char *name) -{ - struct bfd_elf_version_deps *ret; - struct bfd_elf_version_tree *t; - - ret = xmalloc (sizeof *ret); - ret->next = list; - - for (t = lang_elf_version_info; t != NULL; t = t->next) - { - if (strcmp (t->name, name) == 0) - { - ret->version_needed = t; - return ret; - } - } - - einfo (_("%X%P: unable to find version dependency `%s'\n"), name); - - return ret; -} - -static void -lang_do_version_exports_section (void) -{ - struct bfd_elf_version_expr *greg = NULL, *lreg; - - LANG_FOR_EACH_INPUT_STATEMENT (is) - { - asection *sec = bfd_get_section_by_name (is->the_bfd, ".exports"); - char *contents, *p; - bfd_size_type len; - - if (sec == NULL) - continue; - - len = bfd_section_size (is->the_bfd, sec); - contents = xmalloc (len); - if (!bfd_get_section_contents (is->the_bfd, sec, contents, 0, len)) - einfo (_("%X%P: unable to read .exports section contents\n"), sec); - - p = contents; - while (p < contents + len) - { - greg = lang_new_vers_pattern (greg, p, NULL); - p = strchr (p, '\0') + 1; - } - - /* Do not free the contents, as we used them creating the regex. */ - - /* Do not include this section in the link. */ - bfd_set_section_flags (is->the_bfd, sec, - bfd_get_section_flags (is->the_bfd, sec) | SEC_EXCLUDE); - } - - lreg = lang_new_vers_pattern (NULL, "*", NULL); - lang_register_vers_node (command_line.version_exports_section, - lang_new_vers_node (greg, lreg), NULL); -} - -void -lang_add_unique (const char *name) -{ - struct unique_sections *ent; - - for (ent = unique_section_list; ent; ent = ent->next) - if (strcmp (ent->name, name) == 0) - return; - - ent = xmalloc (sizeof *ent); - ent->name = xstrdup (name); - ent->next = unique_section_list; - unique_section_list = ent; -} |