OpenE2K
/
binutils-gdb
12
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

PR 6443 

* elf32-ppc.c (MUST_BE_DYN_RELOC): Delete.
	(must_be_dyn_reloc): New function.
	(ppc_elf_check_relocs): Don't set DF_STATIC_TLS for tprel relocs
	in pies.
	(ppc_elf_tls_optimize): Optimise pies.
	(ppc_elf_relocate_section): Use a section symbol rather than no
	symbol if possible for LD->IE TLS sequence, but don't error if
	we must use no symbol.
	* elf64-ppc.c (MUST_BE_DYN_RELOC): As for elf32-ppc.c.
	(must_be_dyn_reloc): Likewise.
	(ppc64_elf_check_relocs): Likewise.
	(ppc64_elf_tls_optimize): Likewise.
	(ppc64_elf_relocate_section): Likewise.
This commit is contained in:
Alan Modra 2008-05-12 12:47:47 +00:00
parent cef1fe971f
commit 1d483afedd
3 changed files with 126 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
bfd/ChangeLog
View File

@ -1,3 +1,20 @@
2008-05-12 Alan Modra <amodra@bigpond.net.au>
PR 6443
* elf32-ppc.c (MUST_BE_DYN_RELOC): Delete.
(must_be_dyn_reloc): New function.
(ppc_elf_check_relocs): Don't set DF_STATIC_TLS for tprel relocs
in pies.
(ppc_elf_tls_optimize): Optimise pies.
(ppc_elf_relocate_section): Use a section symbol rather than no
symbol if possible for LD->IE TLS sequence, but don't error if
we must use no symbol.
* elf64-ppc.c (MUST_BE_DYN_RELOC): As for elf32-ppc.c.
(must_be_dyn_reloc): Likewise.
(ppc64_elf_check_relocs): Likewise.
(ppc64_elf_tls_optimize): Likewise.
(ppc64_elf_relocate_section): Likewise.
2008-05-12 Alan Modra <amodra@bigpond.net.au>
* elf32-spu.c (spu_elf_relocate_section): Rename is_ea to is_ea_sym.

74
bfd/elf32-ppc.c
View File

@ -2344,16 +2344,34 @@ struct plt_entry
bfd_vma glink_offset;
};
/* Of those relocs that might be copied as dynamic relocs, this macro
/* Of those relocs that might be copied as dynamic relocs, this function
selects those that must be copied when linking a shared library,
even when the symbol is local. */
#define MUST_BE_DYN_RELOC(RTYPE) \
((RTYPE) != R_PPC_REL24 \
&& (RTYPE) != R_PPC_REL14 \
&& (RTYPE) != R_PPC_REL14_BRTAKEN \
&& (RTYPE) != R_PPC_REL14_BRNTAKEN \
&& (RTYPE) != R_PPC_REL32)
static int
must_be_dyn_reloc (struct bfd_link_info *info,
enum elf_ppc_reloc_type r_type)
{
switch (r_type)
{
default:
return 1;
case R_PPC_REL24:
case R_PPC_REL14:
case R_PPC_REL14_BRTAKEN:
case R_PPC_REL14_BRNTAKEN:
case R_PPC_REL32:
return 0;
case R_PPC_TPREL32:
case R_PPC_TPREL16:
case R_PPC_TPREL16_LO:
case R_PPC_TPREL16_HI:
case R_PPC_TPREL16_HA:
return !info->executable;
}
}
/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
copying dynamic variables from a shared lib into an app's dynbss
@ -2420,7 +2438,7 @@ struct ppc_elf_link_hash_table
/* The .got.plt section (VxWorks only)*/
asection *sgotplt;
/* Shortcut to .__tls_get_addr. */
/* Shortcut to __tls_get_addr. */
struct elf_link_hash_entry *tls_get_addr;
/* The bfd that forced an old-style PLT. */
@ -3112,7 +3130,7 @@ ppc_elf_check_relocs (bfd *abfd,
case R_PPC_GOT_TPREL16_LO:
case R_PPC_GOT_TPREL16_HI:
case R_PPC_GOT_TPREL16_HA:
if (info->shared)
if (!info->executable)
info->flags |= DF_STATIC_TLS;
tls_type = TLS_TLS | TLS_TPREL;
goto dogottls;
@ -3372,7 +3390,11 @@ ppc_elf_check_relocs (bfd *abfd,
/* We shouldn't really be seeing these. */
case R_PPC_TPREL32:
if (info->shared)
case R_PPC_TPREL16:
case R_PPC_TPREL16_LO:
case R_PPC_TPREL16_HI:
case R_PPC_TPREL16_HA:
if (!info->executable)
info->flags |= DF_STATIC_TLS;
goto dodyn;
@ -3381,14 +3403,6 @@ ppc_elf_check_relocs (bfd *abfd,
case R_PPC_DTPREL32:
goto dodyn;
case R_PPC_TPREL16:
case R_PPC_TPREL16_LO:
case R_PPC_TPREL16_HI:
case R_PPC_TPREL16_HA:
if (info->shared)
info->flags |= DF_STATIC_TLS;
goto dodyn;
case R_PPC_REL32:
if (h == NULL
&& got2 != NULL
@ -3489,7 +3503,7 @@ ppc_elf_check_relocs (bfd *abfd,
dynamic library if we manage to avoid copy relocs for the
symbol. */
if ((info->shared
&& (MUST_BE_DYN_RELOC (r_type)
&& (must_be_dyn_reloc (info, r_type)
|| (h != NULL
&& (! info->symbolic
|| h->root.type == bfd_link_hash_defweak
@ -3584,7 +3598,7 @@ ppc_elf_check_relocs (bfd *abfd,
}
p->count += 1;
if (!MUST_BE_DYN_RELOC (r_type))
if (!must_be_dyn_reloc (info, r_type))
p->pc_count += 1;
}
@ -4063,7 +4077,7 @@ ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
struct ppc_elf_link_hash_table *htab;
int pass;
if (info->relocatable || info->shared)
if (info->relocatable || !info->executable)
return TRUE;
htab = ppc_elf_hash_table (info);
@ -4791,7 +4805,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
if (info->shared)
{
/* Relocs that use pc_count are those that appear on a call insn,
or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
or certain REL relocs (see must_be_dyn_reloc) that can be
generated via assembly. We want calls to protected symbols to
resolve directly to the function rather than going via the plt.
If people want function pointer comparisons to work as expected
@ -6074,8 +6088,18 @@ ppc_elf_relocate_section (bfd *output_bfd,
if (tls_gd == 0)
{
/* Was an LD reloc. */
r_symndx = 0;
for (r_symndx = 0;
r_symndx < symtab_hdr->sh_info;
r_symndx++)
if (local_sections[r_symndx] == sec)
break;
if (r_symndx >= symtab_hdr->sh_info)
r_symndx = 0;
rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
if (r_symndx != 0)
rel->r_addend -= (local_syms[r_symndx].st_value
+ sec->output_offset
+ sec->output_section->vma);
}
r_type = R_PPC_TPREL16_HA;
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
@ -6498,7 +6522,7 @@ ppc_elf_relocate_section (bfd *output_bfd,
|| ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
|| (h->root.type == bfd_link_hash_undefweak
&& ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
&& (MUST_BE_DYN_RELOC (r_type)
&& (must_be_dyn_reloc (info, r_type)
|| !SYMBOL_CALLS_LOCAL (info, h)))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
@ -6570,7 +6594,7 @@ ppc_elf_relocate_section (bfd *output_bfd,
{
long indx = 0;
if (bfd_is_abs_section (sec))
if (r_symndx == 0 || bfd_is_abs_section (sec))
;
else if (sec == NULL || sec->owner == NULL)
{

80
bfd/elf64-ppc.c
View File

@ -3191,14 +3191,38 @@ struct plt_entry
} plt;
};
/* Of those relocs that might be copied as dynamic relocs, this macro
/* Of those relocs that might be copied as dynamic relocs, this function
selects those that must be copied when linking a shared library,
even when the symbol is local. */
#define MUST_BE_DYN_RELOC(RTYPE) \
((RTYPE) != R_PPC64_REL32 \
&& (RTYPE) != R_PPC64_REL64 \
&& (RTYPE) != R_PPC64_REL30)
static int
must_be_dyn_reloc (struct bfd_link_info *info,
enum elf_ppc64_reloc_type r_type)
{
switch (r_type)
{
default:
return 1;
case R_PPC64_REL32:
case R_PPC64_REL64:
case R_PPC64_REL30:
return 0;
case R_PPC64_TPREL16:
case R_PPC64_TPREL16_LO:
case R_PPC64_TPREL16_HI:
case R_PPC64_TPREL16_HA:
case R_PPC64_TPREL16_DS:
case R_PPC64_TPREL16_LO_DS:
case R_PPC64_TPREL16_HIGHER:
case R_PPC64_TPREL16_HIGHERA:
case R_PPC64_TPREL16_HIGHEST:
case R_PPC64_TPREL16_HIGHESTA:
case R_PPC64_TPREL64:
return !info->executable;
}
}
/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
copying dynamic variables from a shared lib into an app's dynbss
@ -4492,7 +4516,7 @@ ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
case R_PPC64_GOT_TPREL16_LO_DS:
case R_PPC64_GOT_TPREL16_HI:
case R_PPC64_GOT_TPREL16_HA:
if (info->shared)
if (!info->executable)
info->flags |= DF_STATIC_TLS;
tls_type = TLS_TLS | TLS_TPREL;
goto dogottls;
@ -4677,7 +4701,7 @@ ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
case R_PPC64_TPREL64:
tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
if (info->shared)
if (!info->executable)
info->flags |= DF_STATIC_TLS;
goto dotlstoc;
@ -4746,7 +4770,8 @@ ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
case R_PPC64_TPREL16_HIGHESTA:
if (info->shared)
{
info->flags |= DF_STATIC_TLS;
if (!info->executable)
info->flags |= DF_STATIC_TLS;
goto dodyn;
}
break;
@ -4832,7 +4857,7 @@ ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
symbol. */
dodyn:
if ((info->shared
&& (MUST_BE_DYN_RELOC (r_type)
&& (must_be_dyn_reloc (info, r_type)
|| (h != NULL
&& (! info->symbolic
|| h->root.type == bfd_link_hash_defweak
@ -4928,7 +4953,7 @@ ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
}
p->count += 1;
if (!MUST_BE_DYN_RELOC (r_type))
if (!must_be_dyn_reloc (info, r_type))
p->pc_count += 1;
}
break;
@ -6256,7 +6281,7 @@ dec_dynrel_count (bfd_vma r_info,
}
if ((info->shared
&& (MUST_BE_DYN_RELOC (r_type)
&& (must_be_dyn_reloc (info, r_type)
|| (h != NULL
&& (!info->symbolic
|| h->root.type == bfd_link_hash_defweak
@ -6296,7 +6321,7 @@ dec_dynrel_count (bfd_vma r_info,
{
if (p->sec == sec)
{
if (!MUST_BE_DYN_RELOC (r_type))
if (!must_be_dyn_reloc (info, r_type))
p->pc_count -= 1;
p->count -= 1;
if (p->count == 0)
@ -6768,7 +6793,7 @@ ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
struct ppc_link_hash_table *htab;
int pass;
if (info->relocatable || info->shared)
if (info->relocatable || !info->executable)
return TRUE;
htab = ppc_hash_table (info);
@ -7760,7 +7785,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
if (info->shared)
{
/* Relocs that use pc_count are those that appear on a call insn,
or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
or certain REL relocs (see must_be_dyn_reloc) that can be
generated via assembly. We want calls to protected symbols to
resolve directly to the function rather than going via the plt.
If people want function pointer comparisons to work as expected
@ -10179,14 +10204,17 @@ ppc64_elf_relocate_section (bfd *output_bfd,
&& (h == NULL
|| h->elf.root.type == bfd_link_hash_defined
|| h->elf.root.type == bfd_link_hash_defweak)
&& IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
&& (IS_PPC64_TLS_RELOC (r_type)
!= (sym_type == STT_TLS
|| (sym_type == STT_SECTION
&& (sec->flags & SEC_THREAD_LOCAL) != 0))))
{
if (r_type == R_PPC64_TLS && tls_mask != 0)
/* R_PPC64_TLS is OK against a symbol in the TOC. */
;
else
(*_bfd_error_handler)
(sym_type == STT_TLS
(!IS_PPC64_TLS_RELOC (r_type)
? _("%B(%A+0x%lx): %s used with TLS symbol %s")
: _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
input_bfd,
@ -10405,9 +10433,21 @@ ppc64_elf_relocate_section (bfd *output_bfd,
if (tls_gd == 0)
{
/* Was an LD reloc. */
r_symndx = 0;
if (toc_symndx)
sec = local_sections[toc_symndx];
for (r_symndx = 0;
r_symndx < symtab_hdr->sh_info;
r_symndx++)
if (local_sections[r_symndx] == sec)
break;
if (r_symndx >= symtab_hdr->sh_info)
r_symndx = 0;
rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
if (r_symndx != 0)
rel->r_addend -= (local_syms[r_symndx].st_value
+ sec->output_offset
+ sec->output_section->vma);
rel[1].r_addend = rel->r_addend;
}
else if (toc_symndx != 0)
r_symndx = toc_symndx;
@ -11049,7 +11089,7 @@ ppc64_elf_relocate_section (bfd *output_bfd,
&& (h == NULL
|| ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
|| h->elf.root.type != bfd_link_hash_undefweak)
&& (MUST_BE_DYN_RELOC (r_type)
&& (must_be_dyn_reloc (info, r_type)
|| !SYMBOL_CALLS_LOCAL (info, &h->elf)))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
@ -11134,7 +11174,7 @@ ppc64_elf_relocate_section (bfd *output_bfd,
{
long indx = 0;
if (bfd_is_abs_section (sec))
if (r_symndx == 0 || bfd_is_abs_section (sec))
;
else if (sec == NULL || sec->owner == NULL)
{