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Better handking for unresolved symbols

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This commit is contained in:
Nick Clifton 2003-08-20 08:37:19 +00:00
parent 04d1ab347d
commit 560e09e9cc
35 changed files with 679 additions and 978 deletions
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42
bfd/ChangeLog
View File

@ -1,3 +1,45 @@
2003-08-20 Nick Clifton <nickc@redhat.com>
* elf-bfd.h (RELOC_FOR_GLOBAL_SYMBOL): New macro used to
replace some duplicated code in most elfxx-xxxx.c files. This
version uses the new fields in bfd_link_info.
* elf-m10300.c (mn10300_elf_relocate_section): Use new macro.
* elf32-arm.h (elf32_arm_relocate_section): Likewise.
* elf32-cris.c (cris_elf_relocate_section): Likewise.
* elf32-hppa.c (elf32_hppa_relocate_section): Likewise.
* elf32-i386.c (elf_i386_relocate_section): Likewise.
* elf32-ip2k.c (ip2k_elf_relocate_section): Likewise.
* elf32-iq2000.c (iq2000_elf_relocate_section): Likewise.
* elf32-m68k.c (elf_m68k_relocate_section): Likewise.
* elf32-ppc.c (ppc_elf_relocate_section): Likewise.
* elf32-s390.c (elf_s390_relocate_section): Likewise.
* elf32-sparc.c (elf32_sparc_relocate_section): Likewise.
* elf32-vax.c (elf_vax_relocate_section): Likewise.
* elf32-xtensa.c (elf_xtensa_relocate_section): Likewise.
* elf64-alpha.c (elf64_alpha_relocate_section): Likewise.
* elf64-ppc.c (ppc64_elf_relocate_section): Likewise.
* elf64-s390.c (elf_s390_relocate_section): Likewise.
* elf64-sparc.c (sparc64_elf_relocate_section): Likewise.
* elf64-x86-64.c (elf64_x86_64_relocate_section): Likewise.
* elfxx-ia64.c (elfNN_ia64_relocate_section): Likewise.
* elf-hppa.h (elf_hppa_unmark_useless_dynamic_symbols,
elf_hppa_remark_useless_dynamic_symbols,
elf_hppa_relocate_section): Use the new fields in
bfd_link_info structure.
* elf32-sh.c (sh_elf_relocate_section): Likewise.
* elf64-alpha.c (elf64_alpha_check_relocs): Likewise.
* elf64-hppa.c (elf64_hppa_check_relocs): Likewise.
* elf64-sh64.c (sh_elf64_relocate_section): Likewise.
* elfxx-ia64.c (elfNN_ia64_check_relocs): Likewise.
* elfxx-mips.c (mips_elf_calculate_relocation): Likewise.
* elflink.h (elf_link_output_extsym): Fix test for reporting
undefined symbols in shared libraries. Remove redundant test
of shlib_undefined when reporting references to forced local
symbols.
2003-08-18 Andreas Schwab <schwab@suse.de>
* libpei.h (bfd_pe_executable_p): Also recognize efi-app

56
bfd/elf-bfd.h
View File

@ -1682,4 +1682,60 @@ extern bfd *_bfd_elf64_bfd_from_remote_memory
extern bfd_boolean _sh_elf_set_mach_from_flags
(bfd *);
/* This macro is to avoid lots of duplicated code in the body
of xxx_relocate_section() in the various elfxx-xxxx.c files. */
#define RELOC_FOR_GLOBAL_SYMBOL(h, sym_hashes, r_symndx, symtab_hdr, relocation, sec, unresolved_reloc, info, warned) \
do \
{ \
/* It seems this can happen with erroneous or unsupported \
input (mixing a.out and elf in an archive, for example.) */ \
if (sym_hashes == NULL) \
return FALSE; \
\
h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
\
while (h->root.type == bfd_link_hash_indirect \
|| h->root.type == bfd_link_hash_warning) \
h = (struct elf_link_hash_entry *) h->root.u.i.link; \
\
warned = FALSE; \
unresolved_reloc = FALSE; \
relocation = 0; \
if (h->root.type == bfd_link_hash_defined \
|| h->root.type == bfd_link_hash_defweak) \
{ \
sec = h->root.u.def.section; \
if (sec == NULL \
|| sec->output_section == NULL) \
/* Set a flag that will be cleared later if we find a \
relocation value for this symbol. output_section \
is typically NULL for symbols satisfied by a shared \
library. */ \
unresolved_reloc = TRUE; \
else \
relocation = (h->root.u.def.value \
+ sec->output_section->vma \
+ sec->output_offset); \
} \
else if (h->root.type == bfd_link_hash_undefweak) \
; \
else if (!info->executable \
&& info->unresolved_syms_in_objects == RM_IGNORE \
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
; \
else \
{ \
if (! info->callbacks->undefined_symbol \
(info, h->root.root.string, input_bfd, \
input_section, rel->r_offset, \
((info->shared && info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR) \
|| (!info->shared && info->unresolved_syms_in_objects == RM_GENERATE_ERROR) \
|| ELF_ST_VISIBILITY (h->other)) \
)) \
return FALSE; \
warned = TRUE; \
} \
} \
while (0)
#endif /* _LIBELF_H_ */

7
bfd/elf-hppa.h
View File

@ -1097,7 +1097,7 @@ elf_hppa_unmark_useless_dynamic_symbols (struct elf_link_hash_entry *h,
linker code. */
if (! info->relocatable
&& ! (info->shared
&& !info->no_undefined)
&& info->unresolved_syms_in_shared_libs == RM_IGNORE)
&& h->root.type == bfd_link_hash_undefined
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
@ -1132,7 +1132,7 @@ elf_hppa_remark_useless_dynamic_symbols (struct elf_link_hash_entry *h,
linker code. */
if (! info->relocatable
&& ! (info->shared
&& !info->no_undefined)
&& info->unresolved_syms_in_shared_libs == RM_IGNORE)
&& h->root.type == bfd_link_hash_undefined
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0
@ -1399,7 +1399,8 @@ elf_hppa_relocate_section (bfd *output_bfd,
relocation = 0;
}
/* Allow undefined symbols in shared libraries. */
else if (info->shared && !info->no_undefined
else if (info->shared
&& info->unresolved_syms_in_shared_libs == RM_IGNORE
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
{
if (info->symbolic)

94
bfd/elf-m10300.c
View File

@ -1158,9 +1158,8 @@ mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
}
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
(((Elf32_External_Rela *)
sreloc->contents)
+ sreloc->reloc_count));
(bfd_byte *) (((Elf32_External_Rela *) sreloc->contents)
+ sreloc->reloc_count));
++sreloc->reloc_count;
/* If this reloc is against an external symbol, we do
@ -1295,9 +1294,9 @@ mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
}
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
(((Elf32_External_Rela *)
sreloc->contents)
+ sreloc->reloc_count));
(bfd_byte *) (((Elf32_External_Rela *)
sreloc->contents)
+ sreloc->reloc_count));
++sreloc->reloc_count;
return bfd_reloc_ok;
@ -1480,9 +1479,9 @@ mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
outrel.r_addend = value;
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
(((Elf32_External_Rela *)
srelgot->contents)
+ srelgot->reloc_count));
(bfd_byte *) (((Elf32_External_Rela *)
srelgot->contents)
+ srelgot->reloc_count));
++ srelgot->reloc_count;
}
@ -1579,15 +1578,20 @@ mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.root.type == bfd_link_hash_indirect
|| h->root.root.type == bfd_link_hash_warning)
h = (struct elf32_mn10300_link_hash_entry *) h->root.root.u.i.link;
if (h->root.root.type == bfd_link_hash_defined
bfd_boolean unresolved_reloc;
bfd_boolean warned;
struct elf_link_hash_entry *hh;
RELOC_FOR_GLOBAL_SYMBOL (hh, (struct elf_link_hash_entry *) sym_hashes,
r_symndx, symtab_hdr, relocation,
sec, unresolved_reloc, info,
warned);
h = (struct elf32_mn10300_link_hash_entry *) hh;
if ((h->root.root.type == bfd_link_hash_defined
|| h->root.root.type == bfd_link_hash_defweak)
{
sec = h->root.root.u.def.section;
if ( r_type == R_MN10300_GOTPC32
&& ( r_type == R_MN10300_GOTPC32
|| r_type == R_MN10300_GOTPC16
|| (( r_type == R_MN10300_PLT32
|| r_type == R_MN10300_PLT16)
@ -1615,41 +1619,17 @@ mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section,
do anything with them here. */
|| ((input_section->flags & SEC_DEBUGGING) != 0
&& (h->root.elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC) != 0))))
{
/* In these cases, we don't need the relocation
value. We check specially because in some
obscure cases sec->output_section will be NULL. */
relocation = 0;
}
else if (sec->output_section == NULL)
{
(*_bfd_error_handler)
(_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
bfd_get_filename (input_bfd), h->root.root.root.string,
bfd_get_section_name (input_bfd, input_section));
relocation = 0;
}
else
relocation = (h->root.root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.root.type == bfd_link_hash_undefweak)
& ELF_LINK_HASH_DEF_DYNAMIC) != 0)))))
/* In these cases, we don't need the relocation
value. We check specially because in some
obscure cases sec->output_section will be NULL. */
relocation = 0;
else if (info->shared && !info->symbolic && !info->no_undefined
&& ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
relocation = 0;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.root.string, input_bfd,
input_section, rel->r_offset,
(!info->shared || info->no_undefined
|| ELF_ST_VISIBILITY (h->root.other)))))
return FALSE;
relocation = 0;
}
else if (unresolved_reloc)
(*_bfd_error_handler)
(_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
bfd_get_filename (input_bfd), h->root.root.root.string,
bfd_get_section_name (input_bfd, input_section));
}
r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
@ -4626,8 +4606,8 @@ _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
rel.r_addend = 0;
bfd_elf32_swap_reloca_out (output_bfd, &rel,
((Elf32_External_Rela *) srel->contents
+ plt_index));
(bfd_byte *) ((Elf32_External_Rela *) srel->contents
+ plt_index));
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
/* Mark the symbol as undefined, rather than as defined in
@ -4673,8 +4653,8 @@ _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
}
bfd_elf32_swap_reloca_out (output_bfd, &rel,
((Elf32_External_Rela *) srel->contents
+ srel->reloc_count));
(bfd_byte *) ((Elf32_External_Rela *) srel->contents
+ srel->reloc_count));
++ srel->reloc_count;
}
@ -4698,8 +4678,8 @@ _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
rel.r_addend = 0;
bfd_elf32_swap_reloca_out (output_bfd, &rel,
((Elf32_External_Rela *) s->contents
+ s->reloc_count));
(bfd_byte *) ((Elf32_External_Rela *) s->contents
+ s->reloc_count));
++ s->reloc_count;
}

70
bfd/elf32-arm.h
View File

@ -1963,19 +1963,16 @@ elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
bfd_boolean warned;
bfd_boolean unresolved_reloc;
while ( h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if ( h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation,
sec, unresolved_reloc, info,
warned);
if (unresolved_reloc || relocation != 0)
{
int relocation_needed = 1;
sec = h->root.u.def.section;
/* In these cases, we don't need the relocation value.
We check specially because in some obscure cases
sec->output_section will be NULL. */
@ -1998,64 +1995,39 @@ elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
&& (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC) != 0))
)
relocation_needed = 0;
relocation = 0;
break;
case R_ARM_GOTPC:
relocation_needed = 0;
relocation = 0;
break;
case R_ARM_GOT32:
if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL
(elf_hash_table(info)->dynamic_sections_created,
(elf_hash_table (info)->dynamic_sections_created,
info->shared, h))
&& (!info->shared
|| (!info->symbolic && h->dynindx != -1)
|| (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))
relocation_needed = 0;
relocation = 0;
break;
case R_ARM_PLT32:
if (h->plt.offset != (bfd_vma)-1)
relocation_needed = 0;
relocation = 0;
break;
default:
if (sec->output_section == NULL)
{
(*_bfd_error_handler)
(_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"),
bfd_archive_filename (input_bfd),
r_type,
h->root.root.string,
bfd_get_section_name (input_bfd, input_section));
relocation_needed = 0;
}
if (unresolved_reloc)
_bfd_error_handler
(_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"),
bfd_archive_filename (input_bfd),
r_type,
h->root.root.string,
bfd_get_section_name (input_bfd, input_section));
break;
}
if (relocation_needed)
relocation = h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset;
else
relocation = 0;
}
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
else if (info->shared && !info->symbolic
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
relocation = 0;
else
{
if (!((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(!info->shared || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
relocation = 0;
}
}

107
bfd/elf32-cris.c
View File

@ -856,24 +856,12 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
/* It seems this can happen with erroneous or unsupported input
(mixing a.out and elf in an archive, for example.) */
if (sym_hashes == NULL)
return FALSE;
bfd_boolean warned;
bfd_boolean unresolved_reloc;
h = sym_hashes [r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
symname = h->root.root.string;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx, symtab_hdr, relocation, sec, unresolved_reloc, info, warned);
if (unresolved_reloc
/* Perhaps we should detect the cases that
sec->output_section is expected to be NULL like i386 and
m68k, but apparently (and according to elfxx-ia64.c) all
@ -888,46 +876,45 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
is *not* dynamically linked against. Thus this will
automatically remind us so we can see if there are other
valid cases we need to revisit. */
if ((sec->output_section == NULL
&& (sec->owner->flags & DYNAMIC) != 0)
&& (sec->owner->flags & DYNAMIC) != 0)
relocation = 0;
/* Here follow the cases where the relocation value must
be zero (or when further handling is simplified when
zero). I can't claim to understand the various
conditions and they weren't described in the files
where I copied them from (elf32-m68k.c and
elf32-i386.c), but let's mention examples of where
they happen. FIXME: Perhaps define and use a
dynamic_symbol_p function like ia64.
else if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
/* Here follow the cases where the relocation value must
be zero (or when further handling is simplified when
zero). I can't claim to understand the various
conditions and they weren't described in the files
where I copied them from (elf32-m68k.c and
elf32-i386.c), but let's mention examples of where
they happen. FIXME: Perhaps define and use a
dynamic_symbol_p function like ia64.
- When creating a shared library, we can have an
ordinary relocation for a symbol defined in a shared
library (perhaps the one we create). We then make
the relocation value zero, as the value seen now will
be added into the relocation addend in this shared
library, but must be handled only at dynamic-link
time. FIXME: Not sure this example covers the
h->elf_link_hash_flags test, though it's there in
other targets. */
|| (info->shared
&& ((! info->symbolic && h->dynindx != -1)
|| (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0)
&& (input_section->flags & SEC_ALLOC) != 0
&& (r_type == R_CRIS_8
|| r_type == R_CRIS_16
|| r_type == R_CRIS_32
|| r_type == R_CRIS_8_PCREL
|| r_type == R_CRIS_16_PCREL
|| r_type == R_CRIS_32_PCREL)))
- When creating a shared library, we can have an
ordinary relocation for a symbol defined in a shared
library (perhaps the one we create). We then make
the relocation value zero, as the value seen now will
be added into the relocation addend in this shared
library, but must be handled only at dynamic-link
time. FIXME: Not sure this example covers the
h->elf_link_hash_flags test, though it's there in
other targets. */
if (info->shared
&& ((! info->symbolic && h->dynindx != -1)
|| (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0)
&& (input_section->flags & SEC_ALLOC) != 0
&& (r_type == R_CRIS_8
|| r_type == R_CRIS_16
|| r_type == R_CRIS_32
|| r_type == R_CRIS_8_PCREL
|| r_type == R_CRIS_16_PCREL
|| r_type == R_CRIS_32_PCREL))
relocation = 0;
else if (sec->output_section != NULL)
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
else
else if (unresolved_reloc)
{
(*_bfd_error_handler)
_bfd_error_handler
(_("%s: unresolvable relocation %s against symbol `%s' from %s section"),
bfd_archive_filename (input_bfd),
cris_elf_howto_table[r_type].name,
@ -937,22 +924,6 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
return FALSE;
}
}
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
else if (info->shared
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
relocation = 0;
else
{
if (!(info->callbacks->undefined_symbol
(info, symname, input_bfd,
input_section, rel->r_offset,
(!info->shared || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
relocation = 0;
}
}
switch (r_type)

60
bfd/elf32-hppa.c
View File

@ -2853,7 +2853,7 @@ elf32_hppa_size_stubs
else if (hash->elf.root.type == bfd_link_hash_undefined)
{
if (! (info->shared
&& !info->no_undefined
&& info->unresolved_syms_in_objects == RM_IGNORE
&& (ELF_ST_VISIBILITY (hash->elf.other)
== STV_DEFAULT)
&& hash->elf.type != STT_PARISC_MILLI))
@ -3444,43 +3444,33 @@ elf32_hppa_relocate_section (bfd *output_bfd,
}
else
{
int indx;
struct elf_link_hash_entry *hh;
bfd_boolean unresolved_reloc;
/* It's a global; Find its entry in the link hash. */
indx = r_symndx - symtab_hdr->sh_info;
h = ((struct elf32_hppa_link_hash_entry *)
elf_sym_hashes (input_bfd)[indx]);
while (h->elf.root.type == bfd_link_hash_indirect
|| h->elf.root.type == bfd_link_hash_warning)
h = (struct elf32_hppa_link_hash_entry *) h->elf.root.u.i.link;
RELOC_FOR_GLOBAL_SYMBOL (hh, elf_sym_hashes (input_bfd), r_symndx, symtab_hdr,
relocation, sym_sec, unresolved_reloc, info,
warned_undef);
relocation = 0;
if (h->elf.root.type == bfd_link_hash_defined
|| h->elf.root.type == bfd_link_hash_defweak)
{
sym_sec = h->elf.root.u.def.section;
/* If sym_sec->output_section is NULL, then it's a
symbol defined in a shared library. */
if (sym_sec->output_section != NULL)
relocation = (h->elf.root.u.def.value
+ sym_sec->output_offset
+ sym_sec->output_section->vma);
}
else if (h->elf.root.type == bfd_link_hash_undefweak)
;
else if (info->shared
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
&& h->elf.type != STT_PARISC_MILLI)
;
else
{
if (!((*info->callbacks->undefined_symbol)
(info, h->elf.root.root.string, input_bfd,
input_section, rel->r_offset, TRUE)))
return FALSE;
warned_undef = TRUE;
if (relocation == 0
&& hh->root.type != bfd_link_hash_defined
&& hh->root.type != bfd_link_hash_defweak
&& hh->root.type != bfd_link_hash_undefweak)
{
if (!info->executable
&& info->unresolved_syms_in_objects == RM_IGNORE
&& ELF_ST_VISIBILITY (hh->other) == STV_DEFAULT
&& hh->type == STT_PARISC_MILLI)
{
if (! info->callbacks->undefined_symbol
(info, hh->root.root.string, input_bfd,
input_section, rel->r_offset,
((info->shared && info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
|| (!info->shared && info->unresolved_syms_in_objects == RM_GENERATE_ERROR))))
return FALSE;
warned_undef = TRUE;
}
}
h = (struct elf32_hppa_link_hash_entry *) hh;
}
/* Do any required modifications to the relocation value, and

37
bfd/elf32-i386.c
View File

@ -2154,42 +2154,9 @@ elf_i386_relocate_section (bfd *output_bfd,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
bfd_boolean warned;
relocation = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
if (sec->output_section == NULL)
/* Set a flag that will be cleared later if we find a
relocation value for this symbol. output_section
is typically NULL for symbols satisfied by a shared
library. */
unresolved_reloc = TRUE;
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
;
else if (!info->executable
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(info->executable || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
}
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx, symtab_hdr, relocation, sec, unresolved_reloc, info, warned);
}
switch (r_type)

27
bfd/elf32-ip2k.c
View File

@ -1532,33 +1532,12 @@ ip2k_elf_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
h = sym_hashes [r_symndx - symtab_hdr->sh_info];
bfd_boolean warned;
bfd_boolean unresolved_reloc;
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx, symtab_hdr, relocation, sec, unresolved_reloc, info, warned);
name = h->root.root.string;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
relocation = h->root.u.def.value + BASEADDR (sec);
}
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(! info->shared || info->no_undefined))))
return FALSE;
relocation = 0;
}
}
/* Finally, the sole IP2K-specific part. */

46
bfd/elf32-iq2000.c
View File

@ -618,48 +618,14 @@ iq2000_elf_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
h = sym_hashes [r_symndx];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
bfd_boolean unresolved_reloc;
bfd_boolean warned;
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation,
sec, unresolved_reloc, info, warned);
name = h->root.root.string;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
#ifdef DEBUG
fprintf (stderr,
"defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
sec->name, name, h->root.u.def.value,
sec->output_section->vma, sec->output_offset, relocation);
#endif
}
else if (h->root.type == bfd_link_hash_undefweak)
{
#ifdef DEBUG
fprintf (stderr, "undefined: sec: %s, name: %s\n",
sec->name, name);
#endif
relocation = 0;
}
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(!info->shared || info->no_undefined))))
return FALSE;
#ifdef DEBUG
fprintf (stderr, "unknown: name: %s\n", name);
#endif
relocation = 0;
}
}
switch (r_type)

38
bfd/elf32-m68k.c
View File

@ -1398,6 +1398,7 @@ elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section,
sym = NULL;
sec = NULL;
unresolved_reloc = FALSE;
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
@ -1406,42 +1407,9 @@ elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
bfd_boolean warned;
relocation = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
if (sec->output_section == NULL)
/* Set a flag that will be cleared later if we find a
relocation value for this symbol. output_section
is typically NULL for symbols satisfied by a shared
library. */
unresolved_reloc = TRUE;
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
;
else if (info->shared
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
;
else
{
if (!(info->callbacks->undefined_symbol
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(!info->shared || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
}
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx, symtab_hdr, relocation, sec, unresolved_reloc, info, warned);
}
switch (r_type)

94
bfd/elf32-ppc.c
View File

@ -4718,6 +4718,7 @@ ppc_elf_relocate_section (bfd *output_bfd,
unresolved_reloc = FALSE;
warned = FALSE;
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
@ -4728,44 +4729,12 @@ ppc_elf_relocate_section (bfd *output_bfd,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation, sec,
unresolved_reloc, info,
warned);
sym_name = h->root.root.string;
relocation = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
/* Set a flag that will be cleared later if we find a
relocation value for this symbol. output_section
is typically NULL for symbols satisfied by a shared
library. */
if (sec->output_section == NULL)
unresolved_reloc = TRUE;
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
;
else if (!info->executable
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd, input_section,
rel->r_offset, (info->executable
|| info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
warned = TRUE;
}
}
/* TLS optimizations. Replace instruction sequences and relocs
@ -5500,49 +5469,16 @@ ppc_elf_relocate_section (bfd *output_bfd,
}
else
{
long indx;
bfd_boolean warned;
bfd_boolean unresolved_reloc;
indx = r_symndx - symtab_hdr->sh_info;
h = elf_sym_hashes (input_bfd)[indx];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
value = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sym_sec = h->root.u.def.section;
/* Detect the cases that sym_sec->output_section is
expected to be NULL -- all cases in which the symbol
is defined in another shared module. This includes
PLT relocs for which we've created a PLT entry and
other relocs for which we're prepared to create
dynamic relocations. */
/* ??? Just accept it NULL and continue. */
if (sym_sec->output_section != NULL)
{
value = (h->root.u.def.value
+ sym_sec->output_section->vma
+ sym_sec->output_offset);
}
}
else if (!info->executable
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(info->executable || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
continue;
}
RELOC_FOR_GLOBAL_SYMBOL (h, elf_sym_hashes (input_bfd),
r_symndx, symtab_hdr,
value, sym_sec,
unresolved_reloc, info,
warned);
if (warned)
continue;
}
hit_addr = contents + rel->r_offset;
value += rel->r_addend;

43
bfd/elf32-s390.c
View File

@ -2331,45 +2331,12 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
bfd_boolean warned ATTRIBUTE_UNUSED;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
if (sec->output_section == NULL)
{
/* Set a flag that will be cleared later if we find a
relocation value for this symbol. output_section
is typically NULL for symbols satisfied by a shared
library. */
unresolved_reloc = TRUE;
relocation = 0;
}
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
else if (!info->executable
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
relocation = 0;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(info->executable || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
relocation = 0;
}
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation, sec,
unresolved_reloc, info,
warned);
}
switch (r_type)

15
bfd/elf32-sh.c
View File

@ -4663,6 +4663,8 @@ sh_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
}
else
{
/* FIXME: Ought to make use of the RELOC_FOR_GLOBAL_SYMBOL macro. */
/* Section symbol are never (?) placed in the hash table, so
we can just ignore hash relocations when creating a
relocatable object file. */
@ -4765,16 +4767,17 @@ sh_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
else if (! info->executable
&& ! info->no_undefined
&& info->unresolved_syms_in_objects == RM_IGNORE
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
relocation = 0;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(info->executable || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
if (! info->callbacks->undefined_symbol
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
((info->shared && info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
|| (!info->shared && info->unresolved_syms_in_objects == RM_GENERATE_ERROR)
|| ELF_ST_VISIBILITY (h->other))))
return FALSE;
relocation = 0;
}

40
bfd/elf32-sparc.c
View File

@ -2186,42 +2186,12 @@ elf32_sparc_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
bfd_boolean warned ATTRIBUTE_UNUSED;
relocation = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
if (sec->output_section == NULL)
/* Set a flag that will be cleared later if we find a
relocation value for this symbol. output_section
is typically NULL for symbols satisfied by a shared
library. */
unresolved_reloc = TRUE;
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
;
else if (!info->executable
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(info->executable || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
}
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation, sec,
unresolved_reloc, info,
warned);
}
switch (r_type)

49
bfd/elf32-vax.c
View File

@ -1487,15 +1487,17 @@ elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (h->root.type == bfd_link_hash_defined
bfd_boolean unresolved_reloc;
bfd_boolean warned;
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation, sec,
unresolved_reloc, info,
warned);
if ((h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
if ((r_type == R_VAX_PLT32
&& ((r_type == R_VAX_PLT32
&& h->plt.offset != (bfd_vma) -1
&& elf_hash_table (info)->dynamic_sections_created)
|| (r_type == R_VAX_GOT32
@ -1524,34 +1526,11 @@ elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
|| r_type == R_VAX_32
|| r_type == R_VAX_PC8
|| r_type == R_VAX_PC16
|| r_type == R_VAX_PC32)))
{
/* In these cases, we don't need the relocation
value. We check specially because in some
obscure cases sec->output_section will be NULL. */
relocation = 0;
}
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
|| r_type == R_VAX_PC32))))
/* In these cases, we don't need the relocation
value. We check specially because in some
obscure cases sec->output_section will be NULL. */
relocation = 0;
else if (info->shared
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
relocation = 0;
else
{
if (!(info->callbacks->undefined_symbol
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(!info->shared || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
relocation = 0;
}
}
switch (r_type)

49
bfd/elf32-xtensa.c
View File

@ -2009,45 +2009,15 @@ elf_xtensa_relocate_section (output_bfd, info, input_bfd,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation, sec,
unresolved_reloc, info,
warned);
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
relocation = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
if (sec->output_section == NULL)
/* Set a flag that will be cleared later if we find a
relocation value for this symbol. output_section
is typically NULL for symbols satisfied by a shared
library. */
unresolved_reloc = TRUE;
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
if (relocation == 0
&& !unresolved_reloc
&& h->root.type == bfd_link_hash_undefweak)
is_weak_undef = TRUE;
else if (info->shared
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(!info->shared || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
warned = TRUE;
}
}
if (relaxing_section)
@ -3575,6 +3545,7 @@ hash_literal_value (src)
const literal_value *src;
{
unsigned hash_val;
if (r_reloc_is_const (&src->r_rel))
return hash_bfd_vma (src->value);
@ -3583,9 +3554,9 @@ hash_literal_value (src)
/* Now check for the same section and the same elf_hash. */
if (r_reloc_is_defined (&src->r_rel))
hash_val += hash_bfd_vma ((bfd_vma) r_reloc_get_section (&src->r_rel));
hash_val += hash_bfd_vma ((bfd_vma) (unsigned) r_reloc_get_section (&src->r_rel));
else
hash_val += hash_bfd_vma ((bfd_vma) r_reloc_get_hash_entry (&src->r_rel));
hash_val += hash_bfd_vma ((bfd_vma) (unsigned) r_reloc_get_hash_entry (&src->r_rel));
return hash_val;
}

55
bfd/elf64-alpha.c
View File

@ -3074,7 +3074,7 @@ elf64_alpha_check_relocs (abfd, info, sec, relocs)
this may help reduce memory usage and processing time later. */
maybe_dynamic = FALSE;
if (h && ((info->shared
&& (!info->symbolic || info->allow_shlib_undefined))
&& (!info->symbolic || info->unresolved_syms_in_shared_libs == RM_IGNORE))
|| ! (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
|| h->root.root.type == bfd_link_hash_defweak))
maybe_dynamic = TRUE;
@ -4445,48 +4445,25 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
h = alpha_elf_sym_hashes (input_bfd)[r_symndx - symtab_hdr->sh_info];
bfd_boolean warned;
bfd_boolean unresolved_reloc;
struct elf_link_hash_entry *hh;
RELOC_FOR_GLOBAL_SYMBOL (hh,
(struct elf_link_hash_entry *) alpha_elf_sym_hashes (input_bfd),
r_symndx, symtab_hdr, value,
sec, unresolved_reloc, info,
warned);
while (h->root.root.type == bfd_link_hash_indirect
|| h->root.root.type == bfd_link_hash_warning)
h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
if (warned)
continue;
value = 0;
if (h->root.root.type == bfd_link_hash_defined
|| h->root.root.type == bfd_link_hash_defweak)
{
sec = h->root.root.u.def.section;
/* Detect the cases that sym_sec->output_section is
expected to be NULL -- all cases in which the symbol
is defined in another shared module. This includes
PLT relocs for which we've created a PLT entry and
other relocs for which we're prepared to create
dynamic relocations. */
/* ??? Just accept it NULL and continue. */
if (sec->output_section != NULL)
value = (h->root.root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.root.type == bfd_link_hash_undefweak)
if (value == 0
&& ! unresolved_reloc
&& hh->root.type == bfd_link_hash_undefweak)
undef_weak_ref = TRUE;
else if (!info->executable
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
;
else
{
if (!((*info->callbacks->undefined_symbol)
(info, h->root.root.root.string, input_bfd,
input_section, rel->r_offset,
(info->executable || info->no_undefined
|| ELF_ST_VISIBILITY (h->root.other)))))
return FALSE;
continue;
}
h = (struct alpha_elf_link_hash_entry *) hh;
dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info);
gotent = h->got_entries;
}

17
bfd/elf64-hppa.c
View File

@ -710,13 +710,14 @@ elf64_hppa_check_relocs (abfd, info, sec, relocs)
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; ++rel)
{
enum {
NEED_DLT = 1,
NEED_PLT = 2,
NEED_STUB = 4,
NEED_OPD = 8,
NEED_DYNREL = 16,
};
enum
{
NEED_DLT = 1,
NEED_PLT = 2,
NEED_STUB = 4,
NEED_OPD = 8,
NEED_DYNREL = 16,
};
struct elf_link_hash_entry *h = NULL;
unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
@ -746,7 +747,7 @@ elf64_hppa_check_relocs (abfd, info, sec, relocs)
this may help reduce memory usage and processing time later. */
maybe_dynamic = FALSE;
if (h && ((info->shared
&& (!info->symbolic || info->allow_shlib_undefined) )
&& (!info->symbolic || info->unresolved_syms_in_shared_libs == RM_IGNORE))
|| ! (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
|| h->root.type == bfd_link_hash_defweak))
maybe_dynamic = TRUE;

41
bfd/elf64-ppc.c
View File

@ -7362,44 +7362,11 @@ ppc64_elf_relocate_section (bfd *output_bfd,
}
else
{
/* It's a global symbol. */
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation, sec,
unresolved_reloc, info,
warned);
sym_name = h->root.root.string;
relocation = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
if (sec->output_section == NULL)
/* Set a flag that will be cleared later if we find a
relocation value for this symbol. output_section
is typically NULL for symbols satisfied by a shared
library. */
unresolved_reloc = TRUE;
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
;
else if (!info->executable
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd, input_section,
rel->r_offset, (info->executable
|| info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
warned = TRUE;
}
}
/* TLS optimizations. Replace instruction sequences and relocs

43
bfd/elf64-s390.c
View File

@ -2301,45 +2301,12 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
bfd_boolean warned ATTRIBUTE_UNUSED;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
if (sec->output_section == NULL)
{
/* Set a flag that will be cleared later if we find a
relocation value for this symbol. output_section
is typically NULL for symbols satisfied by a shared
library. */
unresolved_reloc = TRUE;
relocation = 0;
}
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
else if (!info->executable
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
relocation = 0;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(info->executable || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
relocation = 0;
}
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation, sec,
unresolved_reloc, info,
warned);
}
switch (r_type)

6
bfd/elf64-sh64.c
View File

@ -1610,6 +1610,8 @@ sh_elf64_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
}
else
{
/* ??? Could we use the RELOC_FOR_GLOBAL_SYMBOL macro here ? */
/* Section symbols are never (?) placed in the hash table, so
we can just ignore hash relocations when creating a
relocatable object file. */
@ -1699,7 +1701,9 @@ sh_elf64_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
}
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
else if (info->shared && !info->symbolic && !info->no_undefined)
else if (info->shared
&& !info->symbolic
&& info->unresolved_syms_in_objects == RM_IGNORE)
relocation = 0;
else
{

40
bfd/elf64-sparc.c
View File

@ -2074,42 +2074,14 @@ sparc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
bfd_boolean warned;
relocation = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation, sec,
unresolved_reloc, info,
warned);
if (warned)
{
sec = h->root.u.def.section;
if (sec->output_section == NULL)
/* Set a flag that will be cleared later if we find a
relocation value for this symbol. output_section
is typically NULL for symbols satisfied by a shared
library. */
unresolved_reloc = TRUE;
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
;
else if (!info->executable
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(info->executable || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
/* To avoid generating warning messages about truncated
relocations, set the relocation's address to be the same as
the start of this section. */

43
bfd/elf64-x86-64.c
View File

@ -1827,45 +1827,12 @@ elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
}
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
bfd_boolean warned;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
if (sec->output_section == NULL)
{
/* Set a flag that will be cleared later if we find a
relocation value for this symbol. output_section
is typically NULL for symbols satisfied by a shared
library. */
unresolved_reloc = TRUE;
relocation = 0;
}
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
else if (!info->executable
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
relocation = 0;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(info->executable || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
relocation = 0;
}
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation, sec,
unresolved_reloc, info,
warned);
}
/* When generating a shared object, the relocations handled here are
copied into the output file to be resolved at run time. */

26
bfd/elflink.h
View File

@ -4363,24 +4363,19 @@ elf_link_output_extsym (struct elf_link_hash_entry *h, void *data)
return TRUE;
}
/* If we are not creating a shared library, and this symbol is
referenced by a shared library but is not defined anywhere, then
warn that it is undefined. If we do not do this, the runtime
linker will complain that the symbol is undefined when the
program is run. We don't have to worry about symbols that are
referenced by regular files, because we will already have issued
warnings for them. */
if (! finfo->info->relocatable
&& (finfo->info->executable
|| ! finfo->info->allow_shlib_undefined)
&& h->root.type == bfd_link_hash_undefined
/* If we have an undefined symbol reference here then it must have
come from a shared library that is being linked in. (Undefined
references in regular files have already been handled). If we
are reporting errors for this situation then do so now. */
if (h->root.type == bfd_link_hash_undefined
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0
&& ! elf_link_check_versioned_symbol (finfo->info, h))
&& ! elf_link_check_versioned_symbol (finfo->info, h)
&& finfo->info->unresolved_syms_in_shared_libs != RM_IGNORE)
{
if (! ((*finfo->info->callbacks->undefined_symbol)
(finfo->info, h->root.root.string, h->root.u.undef.abfd,
NULL, 0, TRUE)))
NULL, 0, finfo->info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)))
{
eoinfo->failed = TRUE;
return FALSE;
@ -4390,10 +4385,9 @@ elf_link_output_extsym (struct elf_link_hash_entry *h, void *data)
/* We should also warn if a forced local symbol is referenced from
shared libraries. */
if (! finfo->info->relocatable
&& (! finfo->info->shared || ! finfo->info->allow_shlib_undefined)
&& (! finfo->info->shared)
&& (h->elf_link_hash_flags
& (ELF_LINK_FORCED_LOCAL | ELF_LINK_HASH_REF_DYNAMIC
| ELF_LINK_DYNAMIC_DEF | ELF_LINK_DYNAMIC_WEAK))
& (ELF_LINK_FORCED_LOCAL | ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_DYNAMIC_DEF | ELF_LINK_DYNAMIC_WEAK))
== (ELF_LINK_FORCED_LOCAL | ELF_LINK_HASH_REF_DYNAMIC)
&& ! elf_link_check_versioned_symbol (finfo->info, h))
{

55
bfd/elfxx-ia64.c
View File

@ -2162,7 +2162,7 @@ elfNN_ia64_check_relocs (abfd, info, sec, relocs)
this may help reduce memory usage and processing time later. */
maybe_dynamic = FALSE;
if (h && ((!info->executable
&& (!info->symbolic || info->allow_shlib_undefined))
&& (!info->symbolic || info->unresolved_syms_in_shared_libs == RM_IGNORE))
|| ! (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
|| h->root.type == bfd_link_hash_defweak))
maybe_dynamic = TRUE;
@ -3852,52 +3852,19 @@ elfNN_ia64_relocate_section (output_bfd, info, input_bfd, input_section,
}
else
{
long indx;
bfd_boolean unresolved_reloc;
bfd_boolean warned;
/* Reloc against global symbol. */
indx = r_symndx - symtab_hdr->sh_info;
h = elf_sym_hashes (input_bfd)[indx];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
RELOC_FOR_GLOBAL_SYMBOL (h, elf_sym_hashes (input_bfd),
r_symndx,
symtab_hdr, value, sym_sec,
unresolved_reloc, info,
warned);
value = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sym_sec = h->root.u.def.section;
/* Detect the cases that sym_sec->output_section is
expected to be NULL -- all cases in which the symbol
is defined in another shared module. This includes
PLT relocs for which we've created a PLT entry and
other relocs for which we're prepared to create
dynamic relocations. */
/* ??? Just accept it NULL and continue. */
if (sym_sec->output_section != NULL)
{
value = (h->root.u.def.value
+ sym_sec->output_section->vma
+ sym_sec->output_offset);
}
}
else if (h->root.type == bfd_link_hash_undefweak)
if (h->root.type == bfd_link_hash_undefweak)
undef_weak_ref = TRUE;
else if (! info->executable
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset,
(info->executable || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
continue;
}
else if (warned)
continue;
}
hit_addr = contents + rel->r_offset;

13
bfd/elfxx-mips.c
View File

@ -3008,6 +3008,8 @@ mips_elf_calculate_relocation (abfd, input_bfd, input_section, info,
}
else
{
/* ??? Could we use RELOC_FOR_GLOBAL_SYMBOL here ? */
/* For global symbols we look up the symbol in the hash-table. */
h = ((struct mips_elf_link_hash_entry *)
elf_sym_hashes (input_bfd) [r_symndx - extsymoff]);
@ -3021,7 +3023,7 @@ mips_elf_calculate_relocation (abfd, input_bfd, input_section, info,
/* See if this is the special _gp_disp symbol. Note that such a
symbol must always be a global symbol. */
if (strcmp (h->root.root.root.string, "_gp_disp") == 0
if (strcmp (*namep, "_gp_disp") == 0
&& ! NEWABI_P (input_bfd))
{
/* Relocations against _gp_disp are permitted only with
@ -3054,11 +3056,11 @@ mips_elf_calculate_relocation (abfd, input_bfd, input_section, info,
addresses. */
symbol = 0;
else if (info->shared
&& !info->no_undefined
&& info->unresolved_syms_in_objects == RM_IGNORE
&& ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
symbol = 0;
else if (strcmp (h->root.root.root.string, "_DYNAMIC_LINK") == 0 ||
strcmp (h->root.root.root.string, "_DYNAMIC_LINKING") == 0)
else if (strcmp (*namep, "_DYNAMIC_LINK") == 0 ||
strcmp (*namep, "_DYNAMIC_LINKING") == 0)
{
/* If this is a dynamic link, we should have created a
_DYNAMIC_LINK symbol or _DYNAMIC_LINKING(for normal mips) symbol
@ -3075,7 +3077,8 @@ mips_elf_calculate_relocation (abfd, input_bfd, input_section, info,
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.root.string, input_bfd,
input_section, relocation->r_offset,
(!info->shared || info->no_undefined
((info->shared && info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
|| (!info->shared && info->unresolved_syms_in_objects == RM_GENERATE_ERROR)
|| ELF_ST_VISIBILITY (h->root.other)))))
return bfd_reloc_undefined;
symbol = 0;

9
include/ChangeLog
View File

@ -1,3 +1,12 @@
2003-08-20 Nick Clifton <nickc@redhat.com>
* bfdlink.h (enum report_method): New enum. Describes how to
report something.
(struct bfd_link_info): Delete fields 'no_undefined' and
'allow_shlib_undefined'. Replace with
'unresolved_symbols_in_objects' and
'unresolved_symbols_in_shared_libs'.
2003-08-07 Alan Modra <amodra@bigpond.net.au>
* bfdlink.h: Remove PARAMS macro. Replace PTR with void *.

42
include/bfdlink.h
View File

@ -198,6 +198,19 @@ struct bfd_sym_chain
const char *name;
};
/* How to handle unresolved symbols.
There are four possibilities which are enumerated below: */
enum report_method
{
/* This is the initial value when then link_info structure is created.
It allows the various stages of the linker to determine whether they
allowed to set the value. */
RM_NOT_YET_SET = 0,
RM_IGNORE,
RM_GENERATE_WARNING,
RM_GENERATE_ERROR
};
/* This structure holds all the information needed to communicate
between BFD and the linker when doing a link. */
@ -238,24 +251,6 @@ struct bfd_link_info
need much more time and therefore must be explicitly selected. */
unsigned int optimize: 1;
/* TRUE if BFD should generate errors for undefined symbols
even if generating a shared object. */
unsigned int no_undefined: 1;
/* TRUE if BFD should allow undefined symbols in shared objects even
when no_undefined is set to disallow undefined symbols. The net
result will be that undefined symbols in regular objects will
still trigger an error, but undefined symbols in shared objects
will be ignored. The implementation of no_undefined makes the
assumption that the runtime linker will choke on undefined
symbols. However there is at least one system (BeOS) where
undefined symbols in shared libraries is normal since the kernel
patches them at load time to select which function is most
appropriate for the current architecture. I.E. dynamically
select an appropriate memset function. Apparently it is also
normal for HPPA shared libraries to have undefined symbols. */
unsigned int allow_shlib_undefined: 1;
/* TRUE if ok to have multiple definition. */
unsigned int allow_multiple_definition: 1;
@ -305,6 +300,17 @@ struct bfd_link_info
flags. */
unsigned int noexecstack: 1;
/* What to do with unresolved symbols in an object file.
When producing static binaries the default is GENERATE_ERROR.
When producing dynamic binaries the default is IGNORE. The
assumption with dynamic binaries is that the reference will be
resolved at load/execution time. */
enum report_method unresolved_syms_in_objects;
/* What to do with unresolved symbols in a shared library.
The same defaults apply. */
enum report_method unresolved_syms_in_shared_libs;
/* Which symbols to strip. */
enum bfd_link_strip strip;

17
ld/ChangeLog
View File

@ -1,3 +1,20 @@
2003-08-20 Nick Clifton <nickc@redhat.com>
* ldmain.c: Initialise the new fields in bfd_link_info to
NOT_YET_SET.
* lexsup.c (enum option_values): New enum. Use this to
replace the handed coded values for the long switch options.
(ld_options): Add 'unresolved-symbols',
'warn-unresolved-symbols' and 'error-unresolved-symbols'.
(parse_args): Handle the new switches. Set the values of
unresolved_symbols_in_objects and
unresolved_symbols_in_shared_libs appropriately. If they were
not initialised by the command line, install default values.
* emultempl/elf32.em (handle_option): Update OPTION_GROUP and
-z defs to use the new fields in bfd_link_info.
* ld.texinfo: Document the new switches.
* NEWS: Mention this feature.
2003-08-15 Dmitry Diky <diwil@mail.ru>
* Makefile.am (GENSCRIPTS_EXTRA): New script definition which

5
ld/NEWS
View File

@ -1,5 +1,10 @@
-*- text -*-
* Improved linker's handling of unresolved symbols. The switch
--unresolved-symbols=<method> has been added to tell the linker when it
should report them and the switch --warn-unresolved-symbols has been added to
make reports be issued as warning messages rather than errors.
* Added support for Xtensa architecture.
* Added --with-sysroot configure switch to specify a target system root, for

7
ld/emultempl/elf32.em
View File

@ -1602,7 +1602,8 @@ cat >>e${EMULATION_NAME}.c <<EOF
case OPTION_GROUP:
link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
/* Groups must be self-contained. */
link_info.no_undefined = TRUE;
link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
break;
case 'z':
@ -1631,7 +1632,7 @@ cat >>e${EMULATION_NAME}.c <<EOF
link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
}
else if (strcmp (optarg, "defs") == 0)
link_info.no_undefined = TRUE;
link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
else if (strcmp (optarg, "muldefs") == 0)
link_info.allow_multiple_definition = TRUE;
else if (strcmp (optarg, "combreloc") == 0)
@ -1684,7 +1685,7 @@ cat >>e${EMULATION_NAME}.c <<EOF
fprintf (file, _(" --enable-new-dtags\tEnable new dynamic tags\n"));
fprintf (file, _(" --eh-frame-hdr\tCreate .eh_frame_hdr section\n"));
fprintf (file, _(" -z combreloc\t\tMerge dynamic relocs into one section and sort\n"));
fprintf (file, _(" -z defs\t\tDisallows undefined symbols\n"));
fprintf (file, _(" -z defs\t\tReport unresolved symbols in object files.\n"));
fprintf (file, _(" -z execstack\t\tMark executable as requiring executable stack\n"));
fprintf (file, _(" -z initfirst\t\tMark DSO to be initialized first at runtime\n"));
fprintf (file, _(" -z interpose\t\tMark object to interpose all DSOs but executable\n"));

114
ld/ld.texinfo
View File

@ -883,7 +883,8 @@ Combines multiple reloc sections and sorts them to make dynamic symbol
lookup caching possible.
@item defs
Disallows undefined symbols.
Disallows undefined symbols in object files. Undefined symbols in
shared libaries are still allowed.
@item initfirst
This option is only meaningful when building a shared object.
@ -984,15 +985,16 @@ for which shared libraries are supported. This option is normally the
default on such platforms. The different variants of this option are
for compatibility with various systems. You may use this option
multiple times on the command line: it affects library searching for
@option{-l} options which follow it.
@option{-l} options which follow it. This
option also implies @option{--unresolved-symbols=ignore-all}.
@kindex -Bgroup
@item -Bgroup
Set the @code{DF_1_GROUP} flag in the @code{DT_FLAGS_1} entry in the dynamic
section. This causes the runtime linker to handle lookups in this
object and its dependencies to be performed only inside the group.
@option{--no-undefined} is implied. This option is only meaningful on ELF
platforms which support shared libraries.
@option{--unresolved-symbols=report-all} is implied. This option is
only meaningful on ELF platforms which support shared libraries.
@kindex -Bstatic
@kindex -dn
@ -1006,7 +1008,8 @@ Do not link against shared libraries. This is only meaningful on
platforms for which shared libraries are supported. The different
variants of this option are for compatibility with various systems. You
may use this option multiple times on the command line: it affects
library searching for @option{-l} options which follow it.
library searching for @option{-l} options which follow it. This
option also implies @option{--unresolved-symbols=report-all}.
@kindex -Bsymbolic
@item -Bsymbolic
@ -1025,7 +1028,7 @@ been assigned to see if there any overlaps. Normally the linker will
perform this check, and if it finds any overlaps it will produce
suitable error messages. The linker does know about, and does make
allowances for sections in overlays. The default behaviour can be
restored by using the command line switch @samp{--check-sections}.
restored by using the command line switch @option{--check-sections}.
@cindex cross reference table
@kindex --cref
@ -1146,7 +1149,7 @@ Print a summary of all target specific options on the standard output and exit.
@kindex -Map
@item -Map @var{mapfile}
Print a link map to the file @var{mapfile}. See the description of the
@samp{-M} option, above.
@option{-M} option, above.
@cindex memory usage
@kindex --no-keep-memory
@ -1161,11 +1164,11 @@ while linking a large executable.
@kindex -z defs
@item --no-undefined
@itemx -z defs
Normally when creating a non-symbolic shared library, undefined symbols
are allowed and left to be resolved by the runtime loader. This option
disallows such undefined symbols if they come from regular object
files. The switch @samp{--no-allow-shlib-undefined} controls the
behaviour for shared objects being linked into the shared library.
Report unresolved symbol references from regular object files. This
is done even if the linker is creating a non-symbolic shared library.
The switch @option{--[no-]allow-shlib-undefined} controls the
behaviour for reporting unresolved references found in shared
libraries being linked in.
@kindex --allow-multiple-definition
@kindex -z muldefs
@ -1179,22 +1182,21 @@ first definition will be used.
@kindex --no-allow-shlib-undefined
@item --allow-shlib-undefined
@itemx --no-allow-shlib-undefined
Allow (the default) or disallow undefined symbols in shared objects.
The setting of this switch overrides @samp{--no-undefined} where
shared objects are concerned. Thus if @samp{--no-undefined} is set
but @samp{--no-allow-shlib-undefined} is not, the net result will be
that undefined symbols in regular object files will trigger an error,
but undefined symbols in shared objects will be ignored.
Allows (the default) or disallows undefined symbols in shared libraries.
This switch is similar to @option{--no-undefined} except that it
determines the behaviour when the undefined symbols are in a
shared library rather than a regular object file. It does not affect
how undefined symbols in regular object files are handled.
The reason that @samp{--allow-shlib-undefined} is the default is that
the shared object being specified at link time may not be the same one
that is available at load time, so the symbols might actually be
The reason that @option{--allow-shlib-undefined} is the default is that
the shared library being specified at link time may not be the same as
the one that is available at load time, so the symbols might actually be
resolvable at load time. Plus there are some systems, (eg BeOS) where
undefined symbols in shared libraries is normal since the kernel
patches them at load time to select which function is most appropriate
for the current architecture. eg. to dynamically select an appropriate
memset function. Apparently it is also normal for HPPA shared
libraries to have undefined symbols.
undefined symbols in shared libraries is normal. (The kernel patches
them at load time to select which function is most appropriate
for the current architecture. This is used for example to dynamically
select an appropriate memset function). Apparently it is also normal
for HPPA shared libraries to have undefined symbols.
@kindex --no-undefined-version
@item --no-undefined-version
@ -1486,6 +1488,39 @@ sign (``@key{=}''), and @var{org}.
Same as --section-start, with @code{.bss}, @code{.data} or
@code{.text} as the @var{sectionname}.
@kindex --unresolved-symbols
@item --unresolved-symbols=@var{method}
Determine how to handle unresolved symbols. There are four possible
values for @samp{method}:
@table @samp
@item ignore-all
Do not report any unresolved symbols. This is the default when
creating shared libraries or dynamic executables.
@item report-all
Report all unresolved symbols. This is the default when creating
static binaries.
@item ignore-in-object-files
Report unresolved symbols that are contained in shared libraries, but
ignore them if they come from regular object files.
@item ignore-in-shared-libs
Report unresolved symbols that come from regular object files, but
ignore them if they come from shared libraries. This can be useful
when creating a dynamic binary and it is known that all the shared
libraries that it should be referencing are included on the linker's
command line.
@end table
The behaviour for shared libraries on their own can also be controlled
by the @option{--[no-]allow-shlib-undefined} option.
Normally the linker will generate an error message for each reported
unresolved symbol but the option @option{--warn-unresolved-symbols}
can change this to a warning.
@kindex --verbose
@cindex verbose
@item --dll-verbose
@ -1508,10 +1543,10 @@ is only meaningful on ELF platforms which support shared libraries.
@cindex combining symbols, warnings on
@item --warn-common
Warn when a common symbol is combined with another common symbol or with
a symbol definition. Unix linkers allow this somewhat sloppy practice,
a symbol definition. Unix linkers allow this somewhat sloppy practise,
but linkers on some other operating systems do not. This option allows
you to find potential problems from combining global symbols.
Unfortunately, some C libraries use this practice, so you may get some
Unfortunately, some C libraries use this practise, so you may get some
warnings about symbols in the libraries as well as in your programs.
There are three kinds of global symbols, illustrated here by C examples:
@ -1625,6 +1660,17 @@ The address will only be changed if it not explicitly specified; that
is, if the @code{SECTIONS} command does not specify a start address for
the section (@pxref{SECTIONS}).
@kindex --warn-unresolved-symbols
@item --warn-unresolved-symbols
If the linker is going to report an unresolved symbol (see the option
@option{--unresolved-symbols}) it will normally generate an error.
This option makes it generate a warning instead.
@kindex --error-unresolved-symbols
@item --error-unresolved-symbols
This restores the linker's default behaviour of generating errors when
it is reporting unresolved symbols.
@kindex --whole-archive
@cindex including an entire archive
@item --whole-archive
@ -1871,7 +1917,7 @@ automatically or implicitly exported symbols.
The linker will create the file @var{file} which will contain an
import lib corresponding to the DLL the linker is generating. This
import lib (which should be called @code{*.dll.a} or @code{*.a}
may be used to link clients against the generated DLL; this behavior
may be used to link clients against the generated DLL; this behaviour
makes it possible to skip a separate @code{dlltool} import library
creation step.
[This option is specific to the i386 PE targeted port of the linker]
@ -1897,7 +1943,7 @@ default.
@item --dll-search-prefix @var{string}
When linking dynamically to a dll without an import library,
search for @code{<string><basename>.dll} in preference to
@code{lib<basename>.dll}. This behavior allows easy distinction
@code{lib<basename>.dll}. This behaviour allows easy distinction
between DLLs built for the various "subplatforms": native, cygwin,
uwin, pw, etc. For instance, cygwin DLLs typically use
@code{--dll-search-prefix=cyg}.
@ -1928,7 +1974,7 @@ data type of the exported variable:
One way is to use --enable-runtime-pseudo-reloc switch. This leaves the task
of adjusting references in your client code for runtime environment, so
this method works only when runtime environtment supports this feature.
this method works only when runtime environment supports this feature.
A second solution is to force one of the 'constants' to be a variable --
that is, unknown and un-optimizable at compile time. For arrays,
@ -1968,7 +2014,7 @@ extern_ll -->
A third method of dealing with this difficulty is to abandon
'auto-import' for the offending symbol and mark it with
@code{__declspec(dllimport)}. However, in practice that
@code{__declspec(dllimport)}. However, in practise that
requires using compile-time #defines to indicate whether you are
building a DLL, building client code that will link to the DLL, or
merely building/linking to a static library. In making the choice
@ -2025,7 +2071,7 @@ functions).
@kindex --disable-auto-import
@item --disable-auto-import
Do not attempt to do sophisticalted linking of @code{_symbol} to
Do not attempt to do sophisticated linking of @code{_symbol} to
@code{__imp__symbol} for DATA imports from DLLs.
[This option is specific to the i386 PE targeted port of the linker]
@ -2083,7 +2129,7 @@ subsystem version also.
@c man begin ENVIRONMENT
You can change the behavior of @command{ld} with the environment variables
You can change the behaviour of @command{ld} with the environment variables
@ifclear SingleFormat
@code{GNUTARGET},
@end ifclear

4
ld/ldmain.c
View File

@ -289,8 +289,8 @@ main (int argc, char **argv)
link_info.static_link = FALSE;
link_info.traditional_format = FALSE;
link_info.optimize = FALSE;
link_info.no_undefined = FALSE;
link_info.allow_shlib_undefined = TRUE;
link_info.unresolved_syms_in_objects = RM_NOT_YET_SET;
link_info.unresolved_syms_in_shared_libs = RM_NOT_YET_SET;
link_info.allow_multiple_definition = FALSE;
link_info.allow_undefined_version = TRUE;
link_info.keep_memory = TRUE;

246
ld/lexsup.c
View File

@ -62,82 +62,87 @@ int parsing_defsym = 0;
/* Codes used for the long options with no short synonyms. 150 isn't
special; it's just an arbitrary non-ASCII char value. */
#define OPTION_ASSERT 150
#define OPTION_CALL_SHARED (OPTION_ASSERT + 1)
#define OPTION_CREF (OPTION_CALL_SHARED + 1)
#define OPTION_DEFSYM (OPTION_CREF + 1)
#define OPTION_DEMANGLE (OPTION_DEFSYM + 1)
#define OPTION_DYNAMIC_LINKER (OPTION_DEMANGLE + 1)
#define OPTION_EB (OPTION_DYNAMIC_LINKER + 1)
#define OPTION_EL (OPTION_EB + 1)
#define OPTION_EMBEDDED_RELOCS (OPTION_EL + 1)
#define OPTION_EXPORT_DYNAMIC (OPTION_EMBEDDED_RELOCS + 1)
#define OPTION_HELP (OPTION_EXPORT_DYNAMIC + 1)
#define OPTION_IGNORE (OPTION_HELP + 1)
#define OPTION_MAP (OPTION_IGNORE + 1)
#define OPTION_NO_DEMANGLE (OPTION_MAP + 1)
#define OPTION_NO_KEEP_MEMORY (OPTION_NO_DEMANGLE + 1)
#define OPTION_NO_WARN_MISMATCH (OPTION_NO_KEEP_MEMORY + 1)
#define OPTION_NOINHIBIT_EXEC (OPTION_NO_WARN_MISMATCH + 1)
#define OPTION_NON_SHARED (OPTION_NOINHIBIT_EXEC + 1)
#define OPTION_NO_WHOLE_ARCHIVE (OPTION_NON_SHARED + 1)
#define OPTION_OFORMAT (OPTION_NO_WHOLE_ARCHIVE + 1)
#define OPTION_RELAX (OPTION_OFORMAT + 1)
#define OPTION_RETAIN_SYMBOLS_FILE (OPTION_RELAX + 1)
#define OPTION_RPATH (OPTION_RETAIN_SYMBOLS_FILE + 1)
#define OPTION_RPATH_LINK (OPTION_RPATH + 1)
#define OPTION_SHARED (OPTION_RPATH_LINK + 1)
#define OPTION_SONAME (OPTION_SHARED + 1)
#define OPTION_SORT_COMMON (OPTION_SONAME + 1)
#define OPTION_STATS (OPTION_SORT_COMMON + 1)
#define OPTION_SYMBOLIC (OPTION_STATS + 1)
#define OPTION_TASK_LINK (OPTION_SYMBOLIC + 1)
#define OPTION_TBSS (OPTION_TASK_LINK + 1)
#define OPTION_TDATA (OPTION_TBSS + 1)
#define OPTION_TTEXT (OPTION_TDATA + 1)
#define OPTION_TRADITIONAL_FORMAT (OPTION_TTEXT + 1)
#define OPTION_UR (OPTION_TRADITIONAL_FORMAT + 1)
#define OPTION_VERBOSE (OPTION_UR + 1)
#define OPTION_VERSION (OPTION_VERBOSE + 1)
#define OPTION_VERSION_SCRIPT (OPTION_VERSION + 1)
#define OPTION_VERSION_EXPORTS_SECTION (OPTION_VERSION_SCRIPT + 1)
#define OPTION_WARN_COMMON (OPTION_VERSION_EXPORTS_SECTION + 1)
#define OPTION_WARN_CONSTRUCTORS (OPTION_WARN_COMMON + 1)
#define OPTION_WARN_FATAL (OPTION_WARN_CONSTRUCTORS + 1)
#define OPTION_WARN_MULTIPLE_GP (OPTION_WARN_FATAL + 1)
#define OPTION_WARN_ONCE (OPTION_WARN_MULTIPLE_GP + 1)
#define OPTION_WARN_SECTION_ALIGN (OPTION_WARN_ONCE + 1)
#define OPTION_SPLIT_BY_RELOC (OPTION_WARN_SECTION_ALIGN + 1)
#define OPTION_SPLIT_BY_FILE (OPTION_SPLIT_BY_RELOC + 1)
#define OPTION_WHOLE_ARCHIVE (OPTION_SPLIT_BY_FILE + 1)
#define OPTION_WRAP (OPTION_WHOLE_ARCHIVE + 1)
#define OPTION_FORCE_EXE_SUFFIX (OPTION_WRAP + 1)
#define OPTION_GC_SECTIONS (OPTION_FORCE_EXE_SUFFIX + 1)
#define OPTION_NO_GC_SECTIONS (OPTION_GC_SECTIONS + 1)
#define OPTION_CHECK_SECTIONS (OPTION_NO_GC_SECTIONS + 1)
#define OPTION_NO_CHECK_SECTIONS (OPTION_CHECK_SECTIONS + 1)
#define OPTION_MPC860C0 (OPTION_NO_CHECK_SECTIONS + 1)
#define OPTION_NO_UNDEFINED (OPTION_MPC860C0 + 1)
#define OPTION_INIT (OPTION_NO_UNDEFINED + 1)
#define OPTION_FINI (OPTION_INIT + 1)
#define OPTION_SECTION_START (OPTION_FINI + 1)
#define OPTION_UNIQUE (OPTION_SECTION_START + 1)
#define OPTION_TARGET_HELP (OPTION_UNIQUE + 1)
#define OPTION_ALLOW_SHLIB_UNDEFINED (OPTION_TARGET_HELP + 1)
#define OPTION_NO_ALLOW_SHLIB_UNDEFINED (OPTION_ALLOW_SHLIB_UNDEFINED + 1)
#define OPTION_ALLOW_MULTIPLE_DEFINITION (OPTION_NO_ALLOW_SHLIB_UNDEFINED + 1)
#define OPTION_NO_UNDEFINED_VERSION (OPTION_ALLOW_MULTIPLE_DEFINITION + 1)
#define OPTION_DISCARD_NONE (OPTION_NO_UNDEFINED_VERSION + 1)
#define OPTION_SPARE_DYNAMIC_TAGS (OPTION_DISCARD_NONE + 1)
#define OPTION_NO_DEFINE_COMMON (OPTION_SPARE_DYNAMIC_TAGS + 1)
#define OPTION_NOSTDLIB (OPTION_NO_DEFINE_COMMON + 1)
#define OPTION_NO_OMAGIC (OPTION_NOSTDLIB + 1)
#define OPTION_STRIP_DISCARDED (OPTION_NO_OMAGIC + 1)
#define OPTION_NO_STRIP_DISCARDED (OPTION_STRIP_DISCARDED + 1)
#define OPTION_ACCEPT_UNKNOWN_INPUT_ARCH (OPTION_NO_STRIP_DISCARDED + 1)
#define OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH (OPTION_ACCEPT_UNKNOWN_INPUT_ARCH + 1)
#define OPTION_PIE (OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH + 1)
enum option_values
{
OPTION_ASSERT = 150,
OPTION_CALL_SHARED,
OPTION_CREF,
OPTION_DEFSYM,
OPTION_DEMANGLE,
OPTION_DYNAMIC_LINKER,
OPTION_EB,
OPTION_EL,
OPTION_EMBEDDED_RELOCS,
OPTION_EXPORT_DYNAMIC,
OPTION_HELP,
OPTION_IGNORE,
OPTION_MAP,
OPTION_NO_DEMANGLE,
OPTION_NO_KEEP_MEMORY,
OPTION_NO_WARN_MISMATCH,
OPTION_NOINHIBIT_EXEC,
OPTION_NON_SHARED,
OPTION_NO_WHOLE_ARCHIVE,
OPTION_OFORMAT,
OPTION_RELAX,
OPTION_RETAIN_SYMBOLS_FILE,
OPTION_RPATH,
OPTION_RPATH_LINK,
OPTION_SHARED,
OPTION_SONAME,
OPTION_SORT_COMMON,
OPTION_STATS,
OPTION_SYMBOLIC,
OPTION_TASK_LINK,
OPTION_TBSS,
OPTION_TDATA,
OPTION_TTEXT,
OPTION_TRADITIONAL_FORMAT,
OPTION_UR,
OPTION_VERBOSE,
OPTION_VERSION,
OPTION_VERSION_SCRIPT,
OPTION_VERSION_EXPORTS_SECTION,
OPTION_WARN_COMMON,
OPTION_WARN_CONSTRUCTORS,
OPTION_WARN_FATAL,
OPTION_WARN_MULTIPLE_GP,
OPTION_WARN_ONCE,
OPTION_WARN_SECTION_ALIGN,
OPTION_SPLIT_BY_RELOC,
OPTION_SPLIT_BY_FILE ,
OPTION_WHOLE_ARCHIVE,
OPTION_WRAP,
OPTION_FORCE_EXE_SUFFIX,
OPTION_GC_SECTIONS,
OPTION_NO_GC_SECTIONS,
OPTION_CHECK_SECTIONS,
OPTION_NO_CHECK_SECTIONS,
OPTION_MPC860C0,
OPTION_NO_UNDEFINED,
OPTION_INIT,
OPTION_FINI,
OPTION_SECTION_START,
OPTION_UNIQUE,
OPTION_TARGET_HELP,
OPTION_ALLOW_SHLIB_UNDEFINED,
OPTION_NO_ALLOW_SHLIB_UNDEFINED,
OPTION_ALLOW_MULTIPLE_DEFINITION,
OPTION_NO_UNDEFINED_VERSION,
OPTION_DISCARD_NONE,
OPTION_SPARE_DYNAMIC_TAGS,
OPTION_NO_DEFINE_COMMON,
OPTION_NOSTDLIB,
OPTION_NO_OMAGIC,
OPTION_STRIP_DISCARDED,
OPTION_NO_STRIP_DISCARDED,
OPTION_ACCEPT_UNKNOWN_INPUT_ARCH,
OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH,
OPTION_PIE,
OPTION_UNRESOLVED_SYMBOLS,
OPTION_WARN_UNRESOLVED_SYMBOLS,
OPTION_ERROR_UNRESOLVED_SYMBOLS
};
/* The long options. This structure is used for both the option
parsing and the help text. */
@ -334,11 +339,11 @@ static const struct ld_option ld_options[] =
{ {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
'\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
{ {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
'\0', NULL, N_("Allow no undefined symbols"), TWO_DASHES },
'\0', NULL, N_("Do not allow unresolved references in object files"), TWO_DASHES },
{ {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
'\0', NULL, N_("Allow undefined symbols in shared objects (the default)"), TWO_DASHES },
'\0', NULL, N_("Allow unresolved references in shared libaries"), TWO_DASHES },
{ {"no-allow-shlib-undefined", no_argument, NULL, OPTION_NO_ALLOW_SHLIB_UNDEFINED},
'\0', NULL, N_("Do not allow undefined symbols in shared objects"), TWO_DASHES },
'\0', NULL, N_("Do not allow unresolved references in shared libs"), TWO_DASHES },
{ {"allow-multiple-definition", no_argument, NULL, OPTION_ALLOW_MULTIPLE_DEFINITION},
'\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
{ {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
@ -400,6 +405,9 @@ static const struct ld_option ld_options[] =
'\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
{ {"Ttext", required_argument, NULL, OPTION_TTEXT},
'\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
{ {"unresolved-symbols=<method>", required_argument, NULL, OPTION_UNRESOLVED_SYMBOLS},
'\0', NULL, N_("How to handle unresolved symbols. <method> is:\n\t\t\t\tignore-all, report-all, ignore-in-object-files,\n\t\t\t\tignore-in-shared-libs"),
TWO_DASHES },
{ {"verbose", no_argument, NULL, OPTION_VERBOSE},
'\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
{ {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux. */
@ -422,6 +430,10 @@ static const struct ld_option ld_options[] =
{ {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
'\0', NULL, N_("Warn if start of section changes due to alignment"),
TWO_DASHES },
{ {"warn-unresolved-symbols", no_argument, NULL, OPTION_WARN_UNRESOLVED_SYMBOLS},
'\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
{ {"error-unresolved-symbols", no_argument, NULL, OPTION_ERROR_UNRESOLVED_SYMBOLS},
'\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
{ {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
'\0', NULL, N_("Treat warnings as errors"),
TWO_DASHES },
@ -469,6 +481,7 @@ parse_args (unsigned argc, char **argv)
struct option *longopts;
struct option *really_longopts;
int last_optind;
enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
shortopts = xmalloc (OPTION_COUNT * 3 + 2);
longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
@ -647,9 +660,21 @@ parse_args (unsigned argc, char **argv)
break;
case OPTION_CALL_SHARED:
config.dynamic_link = TRUE;
/* When linking against shared libraries, the default
behaviour is to ignore any unresolved references. */
if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
link_info.unresolved_syms_in_objects = RM_IGNORE;
if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
break;
case OPTION_NON_SHARED:
config.dynamic_link = FALSE;
/* When linking against static libraries, the default
behaviour is to report any unresolved references. */
if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
break;
case OPTION_CREF:
command_line.cref = TRUE;
@ -790,14 +815,53 @@ parse_args (unsigned argc, char **argv)
link_info.keep_memory = FALSE;
break;
case OPTION_NO_UNDEFINED:
link_info.no_undefined = TRUE;
link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
break;
case OPTION_ALLOW_SHLIB_UNDEFINED:
link_info.allow_shlib_undefined = TRUE;
link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
break;
case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
link_info.allow_shlib_undefined = FALSE;
link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
break;
case OPTION_UNRESOLVED_SYMBOLS:
if (strcmp (optarg, "ignore-all") == 0)
{
link_info.unresolved_syms_in_objects = RM_IGNORE;
link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
}
else if (strcmp (optarg, "report-all") == 0)
{
link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
}
else if (strcmp (optarg, "ignore-in-object-files") == 0)
{
link_info.unresolved_syms_in_objects = RM_IGNORE;
link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
}
else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
{
link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
}
else
einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
break;
case OPTION_WARN_UNRESOLVED_SYMBOLS:
how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
break;
case OPTION_ERROR_UNRESOLVED_SYMBOLS:
how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
break;
case OPTION_ALLOW_MULTIPLE_DEFINITION:
link_info.allow_multiple_definition = TRUE;
break;
@ -948,7 +1012,15 @@ parse_args (unsigned argc, char **argv)
break;
case OPTION_SHARED:
if (config.has_shared)
link_info.shared = TRUE;
{
link_info.shared = TRUE;
/* When creating a shared library, the default
behaviour is to ignore any unresolved references. */
if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
link_info.unresolved_syms_in_objects = RM_IGNORE;
if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
}
else
einfo (_("%P%F: -shared not supported\n"));
break;
@ -1202,6 +1274,14 @@ parse_args (unsigned argc, char **argv)
set_default_dirlist (default_dirlist);
free (default_dirlist);
}
if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
/* FIXME: Should we allow emulations a chance to set this ? */
link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
/* FIXME: Should we allow emulations a chance to set this ? */
link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
}
/* Add the (colon-separated) elements of DIRLIST_PTR to the