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* ld.h (ld_config_type): New flag member separate_code.
	* emultempl/elf32.em
	(gld${EMULATION_NAME}_before_parse): Set it based on $SEPARATE_CODE.
	* ldlang.c (ldlang_override_segment_assignment): If it's set, then
	always return TRUE when SEC_CODE differs between the sections.
This commit is contained in:
Roland McGrath 2012-11-21 19:56:38 +00:00
parent e0799d78b1
commit 4724d37ec2
4 changed files with 58 additions and 40 deletions
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8
ld/ChangeLog
View file

@ -1,3 +1,11 @@
2012-11-21 Roland McGrath <mcgrathr@google.com>
* ld.h (ld_config_type): New flag member separate_code.
* emultempl/elf32.em
(gld${EMULATION_NAME}_before_parse): Set it based on $SEPARATE_CODE.
* ldlang.c (ldlang_override_segment_assignment): If it's set, then
always return TRUE when SEC_CODE differs between the sections.
2012-11-20 H.J. Lu <hongjiu.lu@intel.com>
* ld.texinfo: Document "-z global".

17
ld/emultempl/elf32.em
View file

@ -104,6 +104,7 @@ gld${EMULATION_NAME}_before_parse (void)
ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
}
EOF
@ -140,7 +141,7 @@ gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
return FALSE;
bfd_elf_set_dyn_lib_class (entry->the_bfd,
(enum dynamic_lib_link_class) link_class);
(enum dynamic_lib_link_class) link_class);
/* Continue on with normal load_symbols processing. */
return FALSE;
@ -1104,7 +1105,7 @@ gld${EMULATION_NAME}_after_open (void)
{
struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
struct build_id_info *b =
(struct build_id_info *) xmalloc (sizeof *b);
(struct build_id_info *) xmalloc (sizeof *b);
b->style = link_info.emit_note_gnu_build_id;
b->sec = s;
@ -1439,7 +1440,7 @@ if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation;
fragment <<EOF
/* used by before_allocation and handle_option. */
static void
static void
gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
{
if (*to == NULL)
@ -1507,7 +1508,7 @@ gld${EMULATION_NAME}_before_allocation (void)
{
const char *audit_libs = elf_dt_audit (abfd);
/* If the input bfd contains an audit entry, we need to add it as
/* If the input bfd contains an audit entry, we need to add it as
a dep audit entry. */
if (audit_libs && *audit_libs != '\0')
{
@ -2204,7 +2205,7 @@ EOF
if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
fragment <<EOF
case OPTION_AUDIT:
gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
break;
case 'P':
@ -2393,7 +2394,7 @@ if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
fragment <<EOF
fprintf (file, _("\
-P AUDITLIB, --depaudit=AUDITLIB\n" "\
Specify a library to use for auditing dependencies\n"));
Specify a library to use for auditing dependencies\n"));
fprintf (file, _("\
--disable-new-dtags Disable new dynamic tags\n"));
fprintf (file, _("\
@ -2422,7 +2423,7 @@ if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
fragment <<EOF
fprintf (file, _("\
-z global Make symbols in DSO available for subsequently\n\
loaded objects\n"));
loaded objects\n"));
fprintf (file, _("\
-z initfirst Mark DSO to be initialized first at runtime\n"));
fprintf (file, _("\
@ -2469,7 +2470,7 @@ fragment <<EOF
-z now Mark object non-lazy runtime binding\n"));
fprintf (file, _("\
-z origin Mark object requiring immediate \$ORIGIN\n\
processing at runtime\n"));
processing at runtime\n"));
fprintf (file, _("\
-z relro Create RELRO program header\n"));
fprintf (file, _("\

5
ld/ld.h
View file

@ -82,7 +82,7 @@ typedef struct name_list {
name_list;
typedef enum {sort_none, sort_ascending, sort_descending} sort_order;
/* A wildcard specification. */
typedef enum {
@ -274,6 +274,9 @@ typedef struct {
numbers everywhere. */
bfd_boolean sane_expr;
/* If set, code and non-code sections should never be in one segment. */
bfd_boolean separate_code;
/* The rpath separation character. Usually ':'. */
char rpath_separator;

68
ld/ldlang.c
View file

@ -878,8 +878,8 @@ walk_wild_file (lang_wild_statement_type *s,
if (member->usrdata != NULL)
{
walk_wild_section (s,
(lang_input_statement_type *) member->usrdata,
callback, data);
(lang_input_statement_type *) member->usrdata,
callback, data);
}
member = bfd_openr_next_archived_file (f->the_bfd, member);
@ -1050,7 +1050,7 @@ new_afile (const char *name,
else
{
p = (lang_input_statement_type *)
stat_alloc (sizeof (lang_input_statement_type));
stat_alloc (sizeof (lang_input_statement_type));
p->header.type = lang_input_statement_enum;
p->header.next = NULL;
}
@ -1148,7 +1148,7 @@ output_section_statement_newfunc (struct bfd_hash_entry *entry,
if (entry == NULL)
{
entry = (struct bfd_hash_entry *) bfd_hash_allocate (table,
sizeof (*ret));
sizeof (*ret));
if (entry == NULL)
return entry;
}
@ -1283,12 +1283,12 @@ lang_memory_region_lookup (const char *const name, bfd_boolean create)
for (r = lang_memory_region_list; r != NULL; r = r->next)
for (n = &r->name_list; n != NULL; n = n->next)
if (strcmp (n->name, name) == 0)
{
if (create)
einfo (_("%P:%S: warning: redeclaration of memory region `%s'\n"),
NULL, name);
return r;
}
{
if (create)
einfo (_("%P:%S: warning: redeclaration of memory region `%s'\n"),
NULL, name);
return r;
}
if (!create && strcmp (name, DEFAULT_MEMORY_REGION))
einfo (_("%P:%S: warning: memory region `%s' not declared\n"),
@ -1334,19 +1334,19 @@ lang_memory_region_alias (const char * alias, const char * region_name)
for (r = lang_memory_region_list; r != NULL; r = r->next)
for (n = &r->name_list; n != NULL; n = n->next)
{
if (region == NULL && strcmp (n->name, region_name) == 0)
region = r;
if (strcmp (n->name, alias) == 0)
einfo (_("%F%P:%S: error: redefinition of memory region "
"alias `%s'\n"),
NULL, alias);
if (region == NULL && strcmp (n->name, region_name) == 0)
region = r;
if (strcmp (n->name, alias) == 0)
einfo (_("%F%P:%S: error: redefinition of memory region "
"alias `%s'\n"),
NULL, alias);
}
/* Check if the target region exists. */
if (region == NULL)
einfo (_("%F%P:%S: error: memory region `%s' "
"for alias `%s' does not exist\n"),
NULL, region_name, alias);
"for alias `%s' does not exist\n"),
NULL, region_name, alias);
/* Add alias to region name list. */
n = (lang_memory_region_name *) stat_alloc (sizeof (lang_memory_region_name));
@ -1777,7 +1777,7 @@ lang_insert_orphan (asection *s,
os_tail = ((lang_output_section_statement_type **)
lang_output_section_statement.tail);
os = lang_enter_output_section_statement (secname, address, normal_section,
NULL, NULL, NULL, constraint);
NULL, NULL, NULL, constraint);
ps = NULL;
if (config.build_constructors && *os_tail == os)
@ -2080,14 +2080,14 @@ sort_def_symbol (struct bfd_link_hash_entry *hash_entry,
struct map_symbol_def *def;
ud = (struct fat_user_section_struct *)
get_userdata (hash_entry->u.def.section);
get_userdata (hash_entry->u.def.section);
if (! ud)
{
/* ??? What do we have to do to initialize this beforehand? */
/* The first time we get here is bfd_abs_section... */
init_map_userdata (0, hash_entry->u.def.section, 0);
ud = (struct fat_user_section_struct *)
get_userdata (hash_entry->u.def.section);
get_userdata (hash_entry->u.def.section);
}
else if (!ud->map_symbol_def_tail)
ud->map_symbol_def_tail = &ud->map_symbol_def_head;
@ -2125,7 +2125,7 @@ init_os (lang_output_section_statement_type *s, flagword flags)
if (!link_info.reduce_memory_overheads)
{
fat_section_userdata_type *new_userdata = (fat_section_userdata_type *)
stat_alloc (sizeof (fat_section_userdata_type));
stat_alloc (sizeof (fat_section_userdata_type));
memset (new_userdata, 0, sizeof (fat_section_userdata_type));
get_userdata (s->bfd_section) = new_userdata;
}
@ -2264,7 +2264,7 @@ lang_add_section (lang_statement_list_type *ptr,
keep = bfd_lookup_section_flags (&link_info, sflag_info, section);
if (!keep)
return;
return;
}
if (section->output_section != NULL)
@ -4151,7 +4151,7 @@ print_all_symbols (asection *sec)
entries[i] = def->entry;
qsort (entries, ud->map_symbol_def_count, sizeof (*entries),
hash_entry_addr_cmp);
hash_entry_addr_cmp);
/* Print the symbols. */
for (i = 0; i < ud->map_symbol_def_count; i++)
@ -4583,7 +4583,7 @@ insert_pad (lang_statement_union_type **ptr,
{
/* Make a new padding statement, linked into existing chain. */
pad = (lang_statement_union_type *)
stat_alloc (sizeof (lang_padding_statement_type));
stat_alloc (sizeof (lang_padding_statement_type));
pad->header.next = *ptr;
*ptr = pad;
pad->header.type = lang_padding_statement_enum;
@ -5361,6 +5361,12 @@ ldlang_override_segment_assignment (struct bfd_link_info * info ATTRIBUTE_UNUSED
if (current_section == NULL || previous_section == NULL)
return new_segment;
/* If this flag is set, the target never wants code and non-code
sections comingled in the same segment. */
if (config.separate_code
&& ((current_section->flags ^ previous_section->flags) & SEC_CODE))
return TRUE;
/* Find the memory regions associated with the two sections.
We call lang_output_section_find() here rather than scanning the list
of output sections looking for a matching section pointer because if
@ -7237,7 +7243,7 @@ lang_record_phdrs (void)
{
alc *= 2;
secs = (asection **) xrealloc (secs,
alc * sizeof (asection *));
alc * sizeof (asection *));
}
secs[c] = os->bfd_section;
++c;
@ -7539,7 +7545,7 @@ lang_vers_match (struct bfd_elf_version_expr_head *head,
{
e.pattern = c_sym;
expr = (struct bfd_elf_version_expr *)
htab_find ((htab_t) head->htab, &e);
htab_find ((htab_t) head->htab, &e);
while (expr && strcmp (expr->pattern, c_sym) == 0)
if (expr->mask == BFD_ELF_VERSION_C_TYPE)
goto out_ret;
@ -7552,7 +7558,7 @@ lang_vers_match (struct bfd_elf_version_expr_head *head,
{
e.pattern = cxx_sym;
expr = (struct bfd_elf_version_expr *)
htab_find ((htab_t) head->htab, &e);
htab_find ((htab_t) head->htab, &e);
while (expr && strcmp (expr->pattern, cxx_sym) == 0)
if (expr->mask == BFD_ELF_VERSION_CXX_TYPE)
goto out_ret;
@ -7565,7 +7571,7 @@ lang_vers_match (struct bfd_elf_version_expr_head *head,
{
e.pattern = java_sym;
expr = (struct bfd_elf_version_expr *)
htab_find ((htab_t) head->htab, &e);
htab_find ((htab_t) head->htab, &e);
while (expr && strcmp (expr->pattern, java_sym) == 0)
if (expr->mask == BFD_ELF_VERSION_JAVA_TYPE)
goto out_ret;
@ -7862,7 +7868,7 @@ lang_register_vers_node (const char *name,
if (t->locals.htab && e1->literal)
{
e2 = (struct bfd_elf_version_expr *)
htab_find ((htab_t) t->locals.htab, e1);
htab_find ((htab_t) t->locals.htab, e1);
while (e2 && strcmp (e1->pattern, e2->pattern) == 0)
{
if (e1->mask == e2->mask)
@ -7889,7 +7895,7 @@ lang_register_vers_node (const char *name,
if (t->globals.htab && e1->literal)
{
e2 = (struct bfd_elf_version_expr *)
htab_find ((htab_t) t->globals.htab, e1);
htab_find ((htab_t) t->globals.htab, e1);
while (e2 && strcmp (e1->pattern, e2->pattern) == 0)
{
if (e1->mask == e2->mask)