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* 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.
This commit is contained in:
Alan Modra 2005-08-15 15:39:08 +00:00
parent 36ae0db314
commit d98685ac81
6 changed files with 88 additions and 145 deletions
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13
bfd/ChangeLog
View File

@ -1,3 +1,16 @@
2005-08-16 Alan Modra <amodra@bigpond.net.au>
* 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.
2005-08-15 Paul Brook <paul@codesourcery.com>
* elf32-arm.c (elf32_arm_howto_table_1): Make R_ARM_PLT32 the same as

2
bfd/elf-bfd.h
View File

@ -1639,6 +1639,8 @@ extern bfd_boolean _bfd_elf_create_dynamic_sections
(bfd *, struct bfd_link_info *);
extern bfd_boolean _bfd_elf_create_got_section
(bfd *, struct bfd_link_info *);
extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym
(bfd *, struct bfd_link_info *, asection *, const char *);
extern bfd_boolean _bfd_elfcore_make_pseudosection
(bfd *, char *, size_t, ufile_ptr);

41
bfd/elf-m10300.c
View File

@ -542,7 +542,6 @@ _bfd_mn10300_elf_create_got_section (abfd, info)
flagword flags;
flagword pltflags;
asection * s;
struct bfd_link_hash_entry * bh;
struct elf_link_hash_entry * h;
const struct elf_backend_data * bed = get_elf_backend_data (abfd);
int ptralign;
@ -581,24 +580,12 @@ _bfd_mn10300_elf_create_got_section (abfd, 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. */
bh = NULL;
if (! (_bfd_generic_link_add_one_symbol
(info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
(bfd_vma) 0, (const char *) 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->shared
&& ! 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, ".got", flags);
if (s == NULL
@ -617,20 +604,10 @@ _bfd_mn10300_elf_create_got_section (abfd, 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, (const char *) NULL, FALSE, bed->collect, &bh)))
return FALSE;
h = (struct elf_link_hash_entry *) bh;
h->def_regular = 1;
h->type = STT_OBJECT;
if (info->shared
&& ! 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. */
s->size += bed->got_header_size;

39
bfd/elf32-frv.c
View File

@ -4301,22 +4301,15 @@ _frv_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, (const char *) NULL, FALSE, bed->collect, &bh)))
h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
elf_hash_table (info)->hgot = h;
if (h == NULL)
return FALSE;
h = (struct elf_link_hash_entry *) bh;
h->def_regular = 1;
h->type = STT_OBJECT;
/* h->other = STV_HIDDEN; */ /* Should we? */
/* Machine-specific: we want the symbol for executables as
well. */
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
elf_hash_table (info)->hgot = h;
}
/* The first bit of the global offset table is the header. */
@ -4399,26 +4392,12 @@ _frv_create_got_section (bfd *abfd, struct bfd_link_info *info)
/* FRV-specific: remember it. */
frvfdpic_plt_section (info) = s;
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;
/* h->other = STV_HIDDEN; */ /* Should we? */
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;
/* FRV-specific: we want rel relocations for the plt. */
s = bfd_make_section_with_flags (abfd, ".rel.plt",

32
bfd/elf64-alpha.c
View File

@ -1232,7 +1232,6 @@ elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
asection *s;
flagword flags;
struct elf_link_hash_entry *h;
struct bfd_link_hash_entry *bh;
/* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
@ -1245,17 +1244,8 @@ elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
/* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
.plt section. */
bh = NULL;
if (! (_bfd_generic_link_add_one_symbol
(info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
(bfd_vma) 0, (const char *) 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->shared && ! bfd_elf_link_record_dynamic_symbol (info, h))
if (!_bfd_elf_define_linkage_sym (abfd, info, s,
"_PROCEDURE_LINKAGE_TABLE_"))
return FALSE;
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
@ -1292,21 +1282,11 @@ elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
dynobj's .got 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,
alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) 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->shared
&& ! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
h = _bfd_elf_define_linkage_sym (abfd, info, alpha_elf_tdata(abfd)->got,
"_GLOBAL_OFFSET_TABLE_");
elf_hash_table (info)->hgot = h;
if (h == NULL)
return FALSE;
return TRUE;
}

106
bfd/elflink.c
View File

@ -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