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2005-07-25 H.J. Lu <hongjiu.lu@intel.com>

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* elf-bfd.h (elf_backend_data): Add common_definition,
	common_section_index, common_section, and merge_symbol.
	(_bfd_elf_common_definition): New.
	(_bfd_elf_common_section_index): New.
	(_bfd_elf_common_section): New.

	* elf.c (elf_fake_sections): Don't clear sh_flags.

	* elflink.c (_bfd_elf_merge_symbol): Call backend merge_symbol
	if it is available.
	(is_global_data_symbol_definition): Call backend
	common_definition instead of checking SHN_COMMON.
	(elf_link_add_object_symbols): Likewise.
	(elf_link_output_extsym): Call backend common_section_index
	for common section index.
	(_bfd_elf_common_definition): New.
	(_bfd_elf_common_section_index): New.
	(_bfd_elf_common_section): New.

	* elfxx-target.h (elf_backend_common_definition): New.
	(elf_backend_common_section_index): New.
	(elf_backend_common_section): New.
	(elf_backend_merge_symbol): New.
	(elfNN_bed): Initialize common_definition, common_section_index,
	common_section, and merge_symbol.

	* section.c (BFD_FAKE_SECTION): New.
	(STD_SECTION): Use it.
	* bfd-in2.h: Regenerated.
This commit is contained in:
H.J. Lu 2005-07-25 15:35:37 +00:00
parent 40afd87930
commit a4d8e49b50
7 changed files with 214 additions and 50 deletions
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32
bfd/ChangeLog
View File

@ -1,3 +1,35 @@
2005-07-25 H.J. Lu <hongjiu.lu@intel.com>
* elf-bfd.h (elf_backend_data): Add common_definition,
common_section_index, common_section, and merge_symbol.
(_bfd_elf_common_definition): New.
(_bfd_elf_common_section_index): New.
(_bfd_elf_common_section): New.
* elf.c (elf_fake_sections): Don't clear sh_flags.
* elflink.c (_bfd_elf_merge_symbol): Call backend merge_symbol
if it is available.
(is_global_data_symbol_definition): Call backend
common_definition instead of checking SHN_COMMON.
(elf_link_add_object_symbols): Likewise.
(elf_link_output_extsym): Call backend common_section_index
for common section index.
(_bfd_elf_common_definition): New.
(_bfd_elf_common_section_index): New.
(_bfd_elf_common_section): New.
* elfxx-target.h (elf_backend_common_definition): New.
(elf_backend_common_section_index): New.
(elf_backend_common_section): New.
(elf_backend_merge_symbol): New.
(elfNN_bed): Initialize common_definition, common_section_index,
common_section, and merge_symbol.
* section.c (BFD_FAKE_SECTION): New.
(STD_SECTION): Use it.
* bfd-in2.h: Regenerated.
2005-07-23 Olaf Hering <olh@suse.de>
* elflink.c (elf_link_input_bfd): Add '\n' for linker einfo

41
bfd/bfd-in2.h
View File

@ -1551,6 +1551,47 @@ extern const struct bfd_symbol * const bfd_ind_symbol;
#define bfd_section_removed_from_list(ABFD, S) \
((S)->next == NULL ? (ABFD)->section_last != (S) : (S)->next->prev != (S))
#define BFD_FAKE_SECTION(SEC, FLAGS, SYM, SYM_PTR, NAME, IDX) \
/* name, id, index, next, prev, flags, user_set_vma, */ \
{ NAME, IDX, 0, NULL, NULL, FLAGS, 0, \
\
/* linker_mark, linker_has_input, gc_mark, gc_mark_from_eh, */ \
0, 0, 1, 0, \
\
/* segment_mark, sec_info_type, use_rela_p, has_tls_reloc, */ \
0, 0, 0, 0, \
\
/* has_gp_reloc, need_finalize_relax, reloc_done, */ \
0, 0, 0, \
\
/* vma, lma, size, rawsize */ \
0, 0, 0, 0, \
\
/* output_offset, output_section, alignment_power, */ \
0, (struct bfd_section *) &SEC, 0, \
\
/* relocation, orelocation, reloc_count, filepos, rel_filepos, */ \
NULL, NULL, 0, 0, 0, \
\
/* line_filepos, userdata, contents, lineno, lineno_count, */ \
0, NULL, NULL, NULL, 0, \
\
/* entsize, kept_section, moving_line_filepos, */ \
0, NULL, 0, \
\
/* target_index, used_by_bfd, constructor_chain, owner, */ \
0, NULL, NULL, NULL, \
\
/* symbol, */ \
(struct bfd_symbol *) SYM, \
\
/* symbol_ptr_ptr, */ \
(struct bfd_symbol **) SYM_PTR, \
\
/* map_head, map_tail */ \
{ NULL }, { NULL } \
}
void bfd_section_list_clear (bfd *);
asection *bfd_get_section_by_name (bfd *abfd, const char *name);

33
bfd/elf-bfd.h
View File

@ -969,6 +969,30 @@ struct elf_backend_data
see elf.c. */
bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
/* Is symbol defined in common section? */
bfd_boolean (*common_definition) (Elf_Internal_Sym *);
/* Return a common section index for section. */
unsigned int (*common_section_index) (asection *);
/* Return a common section for section. */
asection *(*common_section) (asection *);
/* Return TRUE if we can merge 2 definitions. */
bfd_boolean (*merge_symbol) (struct bfd_link_info *,
struct elf_link_hash_entry **,
struct elf_link_hash_entry *,
Elf_Internal_Sym *, asection **,
bfd_vma *, unsigned int *,
bfd_boolean *, bfd_boolean *,
bfd_boolean *, bfd_boolean *,
bfd_boolean *, bfd_boolean *,
bfd_boolean *, bfd_boolean *,
bfd *, asection **,
bfd_boolean *, bfd_boolean *,
bfd_boolean *, bfd_boolean *,
bfd *, asection **);
/* Used to handle bad SHF_LINK_ORDER input. */
bfd_error_handler_type link_order_error_handler;
@ -1741,6 +1765,15 @@ extern int bfd_elf_link_record_local_dynamic_symbol
extern bfd_boolean _bfd_elf_close_and_cleanup
(bfd *);
extern bfd_boolean _bfd_elf_common_definition
(Elf_Internal_Sym *);
extern unsigned int _bfd_elf_common_section_index
(asection *);
extern asection *_bfd_elf_common_section
(asection *);
extern void _bfd_dwarf2_cleanup_debug_info
(bfd *);

2
bfd/elf.c
View File

@ -2618,7 +2618,7 @@ elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
return;
}
this_hdr->sh_flags = 0;
/* Don't clear sh_flags. Assembler may set additional bits. */
if ((asect->flags & SEC_ALLOC) != 0
|| asect->user_set_vma)

53
bfd/elflink.c
View File

@ -780,6 +780,7 @@ _bfd_elf_merge_symbol (bfd *abfd,
bfd *oldbfd;
bfd_boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon;
bfd_boolean newweak, oldweak;
const struct elf_backend_data *bed;
*skip = FALSE;
*override = FALSE;
@ -1121,6 +1122,19 @@ _bfd_elf_merge_symbol (bfd *abfd,
else
olddyncommon = FALSE;
/* We now know everything about the old and new symbols. We ask the
backend to check if we can merge them. */
bed = get_elf_backend_data (abfd);
if (bed->merge_symbol
&& !bed->merge_symbol (info, sym_hash, h, sym, psec, pvalue,
pold_alignment, skip, override,
type_change_ok, size_change_ok,
&newdyn, &newdef, &newdyncommon, &newweak,
abfd, &sec,
&olddyn, &olddef, &olddyncommon, &oldweak,
oldbfd, &oldsec))
return FALSE;
/* If both the old and the new symbols look like common symbols in a
dynamic object, set the size of the symbol to the larger of the
two. */
@ -1197,7 +1211,7 @@ _bfd_elf_merge_symbol (bfd *abfd,
newdef = FALSE;
newdyncommon = FALSE;
*pvalue = sym->st_size;
*psec = sec = bfd_com_section_ptr;
*psec = sec = bed->common_section (oldsec);
*size_change_ok = TRUE;
}
@ -2641,6 +2655,8 @@ static bfd_boolean
is_global_data_symbol_definition (bfd *abfd ATTRIBUTE_UNUSED,
Elf_Internal_Sym *sym)
{
const struct elf_backend_data *bed;
/* Local symbols do not count, but target specific ones might. */
if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL
&& ELF_ST_BIND (sym->st_info) < STB_LOOS)
@ -2656,7 +2672,8 @@ is_global_data_symbol_definition (bfd *abfd ATTRIBUTE_UNUSED,
/* If the symbol is defined in the common section, then
it is a common definition and so does not count. */
if (sym->st_shndx == SHN_COMMON)
bed = get_elf_backend_data (abfd);
if (bed->common_definition (sym))
return FALSE;
/* If the symbol is in a target specific section then we
@ -3548,6 +3565,7 @@ elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
bfd_boolean type_change_ok;
bfd_boolean new_weakdef;
bfd_boolean override;
bfd_boolean common;
unsigned int old_alignment;
bfd *old_bfd;
@ -3557,6 +3575,7 @@ elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
sec = NULL;
value = isym->st_value;
*sym_hash = NULL;
common = bed->common_definition (isym);
bind = ELF_ST_BIND (isym->st_info);
if (bind == STB_LOCAL)
@ -3569,8 +3588,7 @@ elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
}
else if (bind == STB_GLOBAL)
{
if (isym->st_shndx != SHN_UNDEF
&& isym->st_shndx != SHN_COMMON)
if (isym->st_shndx != SHN_UNDEF && !common)
flags = BSF_GLOBAL;
}
else if (bind == STB_WEAK)
@ -3861,13 +3879,12 @@ elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
}
/* Set the alignment of a common symbol. */
if ((isym->st_shndx == SHN_COMMON
|| bfd_is_com_section (sec))
if ((common || bfd_is_com_section (sec))
&& h->root.type == bfd_link_hash_common)
{
unsigned int align;
if (isym->st_shndx == SHN_COMMON)
if (common)
align = bfd_log2 (isym->st_value);
else
{
@ -3893,7 +3910,7 @@ elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
definition or a common symbol is ignored due to the old
normal definition. We need to make sure the maximum
alignment is maintained. */
if ((old_alignment || isym->st_shndx == SHN_COMMON)
if ((old_alignment || common)
&& h->root.type != bfd_link_hash_common)
{
unsigned int common_align;
@ -6498,7 +6515,7 @@ elf_link_output_extsym (struct elf_link_hash_entry *h, void *data)
case bfd_link_hash_common:
input_sec = h->root.u.c.p->section;
sym.st_shndx = SHN_COMMON;
sym.st_shndx = bed->common_section_index (input_sec);
sym.st_value = 1 << h->root.u.c.p->alignment_power;
break;
@ -9900,3 +9917,21 @@ _bfd_elf_fix_excluded_sec_syms (bfd *obfd, struct bfd_link_info *info)
{
bfd_link_hash_traverse (info->hash, fix_syms, obfd);
}
bfd_boolean
_bfd_elf_common_definition (Elf_Internal_Sym *sym)
{
return sym->st_shndx == SHN_COMMON;
}
unsigned int
_bfd_elf_common_section_index (asection *sec ATTRIBUTE_UNUSED)
{
return SHN_COMMON;
}
asection *
_bfd_elf_common_section (asection *sec ATTRIBUTE_UNUSED)
{
return bfd_com_section_ptr;
}

20
bfd/elfxx-target.h
View File

@ -521,6 +521,22 @@
#define elf_backend_link_order_error_handler _bfd_default_error_handler
#endif
#ifndef elf_backend_common_definition
#define elf_backend_common_definition _bfd_elf_common_definition
#endif
#ifndef elf_backend_common_section_index
#define elf_backend_common_section_index _bfd_elf_common_section_index
#endif
#ifndef elf_backend_common_section
#define elf_backend_common_section _bfd_elf_common_section
#endif
#ifndef elf_backend_merge_symbol
#define elf_backend_merge_symbol NULL
#endif
extern const struct elf_size_info _bfd_elfNN_size_info;
#ifndef INCLUDED_TARGET_FILE
@ -590,6 +606,10 @@ static const struct elf_backend_data elfNN_bed =
elf_backend_ecoff_debug_swap,
elf_backend_bfd_from_remote_memory,
elf_backend_plt_sym_val,
elf_backend_common_definition,
elf_backend_common_section_index,
elf_backend_common_section,
elf_backend_merge_symbol,
elf_backend_link_order_error_handler,
elf_backend_relplt_name,
ELF_MACHINE_ALT1,

83
bfd/section.c
View File

@ -635,6 +635,47 @@ CODE_FRAGMENT
.#define bfd_section_removed_from_list(ABFD, S) \
. ((S)->next == NULL ? (ABFD)->section_last != (S) : (S)->next->prev != (S))
.
.#define BFD_FAKE_SECTION(SEC, FLAGS, SYM, SYM_PTR, NAME, IDX) \
. {* name, id, index, next, prev, flags, user_set_vma, *} \
. { NAME, IDX, 0, NULL, NULL, FLAGS, 0, \
. \
. {* linker_mark, linker_has_input, gc_mark, gc_mark_from_eh, *} \
. 0, 0, 1, 0, \
. \
. {* segment_mark, sec_info_type, use_rela_p, has_tls_reloc, *} \
. 0, 0, 0, 0, \
. \
. {* has_gp_reloc, need_finalize_relax, reloc_done, *} \
. 0, 0, 0, \
. \
. {* vma, lma, size, rawsize *} \
. 0, 0, 0, 0, \
. \
. {* output_offset, output_section, alignment_power, *} \
. 0, (struct bfd_section *) &SEC, 0, \
. \
. {* relocation, orelocation, reloc_count, filepos, rel_filepos, *} \
. NULL, NULL, 0, 0, 0, \
. \
. {* line_filepos, userdata, contents, lineno, lineno_count, *} \
. 0, NULL, NULL, NULL, 0, \
. \
. {* entsize, kept_section, moving_line_filepos, *} \
. 0, NULL, 0, \
. \
. {* target_index, used_by_bfd, constructor_chain, owner, *} \
. 0, NULL, NULL, NULL, \
. \
. {* symbol, *} \
. (struct bfd_symbol *) SYM, \
. \
. {* symbol_ptr_ptr, *} \
. (struct bfd_symbol **) SYM_PTR, \
. \
. {* map_head, map_tail *} \
. { NULL }, { NULL } \
. }
.
*/
/* We use a macro to initialize the static asymbol structures because
@ -662,46 +703,8 @@ static const asymbol global_syms[] =
#define STD_SECTION(SEC, FLAGS, SYM, NAME, IDX) \
const asymbol * const SYM = (asymbol *) &global_syms[IDX]; \
asection SEC = \
/* name, id, index, next, prev, flags, user_set_vma, */ \
{ NAME, IDX, 0, NULL, NULL, FLAGS, 0, \
\
/* linker_mark, linker_has_input, gc_mark, gc_mark_from_eh, */ \
0, 0, 1, 0, \
\
/* segment_mark, sec_info_type, use_rela_p, has_tls_reloc, */ \
0, 0, 0, 0, \
\
/* has_gp_reloc, need_finalize_relax, reloc_done, */ \
0, 0, 0, \
\
/* vma, lma, size, rawsize */ \
0, 0, 0, 0, \
\
/* output_offset, output_section, alignment_power, */ \
0, (struct bfd_section *) &SEC, 0, \
\
/* relocation, orelocation, reloc_count, filepos, rel_filepos, */ \
NULL, NULL, 0, 0, 0, \
\
/* line_filepos, userdata, contents, lineno, lineno_count, */ \
0, NULL, NULL, NULL, 0, \
\
/* entsize, kept_section, moving_line_filepos, */ \
0, NULL, 0, \
\
/* target_index, used_by_bfd, constructor_chain, owner, */ \
0, NULL, NULL, NULL, \
\
/* symbol, */ \
(struct bfd_symbol *) &global_syms[IDX], \
\
/* symbol_ptr_ptr, */ \
(struct bfd_symbol **) &SYM, \
\
/* map_head, map_tail */ \
{ NULL }, { NULL } \
}
asection SEC = BFD_FAKE_SECTION(SEC, FLAGS, &global_syms[IDX], &SYM, \
NAME, IDX)
STD_SECTION (bfd_com_section, SEC_IS_COMMON, bfd_com_symbol,
BFD_COM_SECTION_NAME, 0);