aboutsummaryrefslogtreecommitdiff
path: root/bfd/elflink.c
diff options
context:
space:
mode:
authorAlan Modra <amodra@gmail.com>2005-08-15 15:39:08 +0000
committerAlan Modra <amodra@gmail.com>2005-08-15 15:39:08 +0000
commitd98685ac81121ad2dc5acec4300d9f0833b7bd0f (patch)
treebfaa6c7f226d474b0f9176770a92d7c46795a8c2 /bfd/elflink.c
parent36ae0db314931725feb8bd6958e40c46919ee6ae (diff)
downloadgdb-d98685ac81121ad2dc5acec4300d9f0833b7bd0f.zip
gdb-d98685ac81121ad2dc5acec4300d9f0833b7bd0f.tar.gz
gdb-d98685ac81121ad2dc5acec4300d9f0833b7bd0f.tar.bz2
* elf-bfd.h (_bfd_elf_define_linkage_sym): Declare.
* elflink.c (_bfd_elf_define_linkage_sym): New function, extracted from.. (_bfd_elf_create_got_section): ..here. (_bfd_elf_link_create_dynamic_sections): Call it for _DYNAMIC. (_bfd_elf_create_dynamic_sections): ..and _PROCEDURE_LINKAGE_TABLE_. * elf-m10300.c (_bfd_mn10300_elf_create_got_section): Use _bfd_elf_define_linkage_sym. * elf32-frv.c (_frv_create_got_section): Likewise. * elf64-alpha.c (elf64_alpha_create_dynamic_sections): Likewise.
Diffstat (limited to 'bfd/elflink.c')
-rw-r--r--bfd/elflink.c106
1 files changed, 49 insertions, 57 deletions
diff --git a/bfd/elflink.c b/bfd/elflink.c
index 7b7cddd..14096aa 100644
--- a/bfd/elflink.c
+++ b/bfd/elflink.c
@@ -27,13 +27,51 @@
#include "safe-ctype.h"
#include "libiberty.h"
+/* Define a symbol in a dynamic linkage section. */
+
+struct elf_link_hash_entry *
+_bfd_elf_define_linkage_sym (bfd *abfd,
+ struct bfd_link_info *info,
+ asection *sec,
+ const char *name)
+{
+ struct elf_link_hash_entry *h;
+ struct bfd_link_hash_entry *bh;
+
+ h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE);
+ if (h != NULL)
+ {
+ /* Zap symbol defined in an as-needed lib that wasn't linked.
+ This is a symptom of a larger problem: Absolute symbols
+ defined in shared libraries can't be overridden, because we
+ lose the link to the bfd which is via the symbol section. */
+ h->root.type = bfd_link_hash_new;
+ }
+
+ bh = &h->root;
+ if (!_bfd_generic_link_add_one_symbol (info, abfd, name, BSF_GLOBAL,
+ sec, 0, NULL, FALSE,
+ get_elf_backend_data (abfd)->collect,
+ &bh))
+ return NULL;
+ h = (struct elf_link_hash_entry *) bh;
+ h->def_regular = 1;
+ h->type = STT_OBJECT;
+ h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
+
+ if (!info->executable
+ && !bfd_elf_link_record_dynamic_symbol (info, h))
+ return NULL;
+
+ return h;
+}
+
bfd_boolean
_bfd_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
{
flagword flags;
asection *s;
struct elf_link_hash_entry *h;
- struct bfd_link_hash_entry *bh;
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
int ptralign;
@@ -78,21 +116,10 @@ _bfd_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
(or .got.plt) section. We don't do this in the linker script
because we don't want to define the symbol if we are not creating
a global offset table. */
- bh = NULL;
- if (!(_bfd_generic_link_add_one_symbol
- (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
- 0, NULL, FALSE, bed->collect, &bh)))
- return FALSE;
- h = (struct elf_link_hash_entry *) bh;
- h->def_regular = 1;
- h->type = STT_OBJECT;
- h->other = STV_HIDDEN;
-
- if (! info->executable
- && ! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
-
+ h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
elf_hash_table (info)->hgot = h;
+ if (h == NULL)
+ return FALSE;
}
/* The first bit of the global offset table is the header. */
@@ -132,8 +159,6 @@ _bfd_elf_link_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
{
flagword flags;
register asection *s;
- struct elf_link_hash_entry *h;
- struct bfd_link_hash_entry *bh;
const struct elf_backend_data *bed;
if (! is_elf_hash_table (info->hash))
@@ -212,27 +237,7 @@ _bfd_elf_link_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
section. We don't want to define it if there is no .dynamic
section, since on some ELF platforms the start up code examines it
to decide how to initialize the process. */
- h = elf_link_hash_lookup (elf_hash_table (info), "_DYNAMIC",
- FALSE, FALSE, FALSE);
- if (h != NULL)
- {
- /* Zap symbol defined in an as-needed lib that wasn't linked.
- This is a symptom of a larger problem: Absolute symbols
- defined in shared libraries can't be overridden, because we
- lose the link to the bfd which is via the symbol section. */
- h->root.type = bfd_link_hash_new;
- }
- bh = &h->root;
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, 0, NULL, FALSE,
- get_elf_backend_data (abfd)->collect, &bh)))
- return FALSE;
- h = (struct elf_link_hash_entry *) bh;
- h->def_regular = 1;
- h->type = STT_OBJECT;
-
- if (! info->executable
- && ! bfd_elf_link_record_dynamic_symbol (info, h))
+ if (!_bfd_elf_define_linkage_sym (abfd, info, s, "_DYNAMIC"))
return FALSE;
s = bfd_make_section_with_flags (abfd, ".hash",
@@ -282,25 +287,12 @@ _bfd_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
|| ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
return FALSE;
- if (bed->want_plt_sym)
- {
- /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
- .plt section. */
- struct elf_link_hash_entry *h;
- struct bfd_link_hash_entry *bh = NULL;
-
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
- FALSE, get_elf_backend_data (abfd)->collect, &bh)))
- return FALSE;
- h = (struct elf_link_hash_entry *) bh;
- h->def_regular = 1;
- h->type = STT_OBJECT;
-
- if (! info->executable
- && ! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
+ /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
+ .plt section. */
+ if (bed->want_plt_sym
+ && !_bfd_elf_define_linkage_sym (abfd, info, s,
+ "_PROCEDURE_LINKAGE_TABLE_"))
+ return FALSE;
s = bfd_make_section_with_flags (abfd,
(bed->default_use_rela_p