You should have received a copy of the GNU General Public License
along with this program; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Boston, MA 02110-1301, USA. */
/* This file is based on a preliminary PowerPC ELF ABI. The
information may not match the final PowerPC ELF ABI. It includes
bfd_vma addend;
/* which linker section this is */
elf_linker_section_t *lsect;
- /* whether address was written yet */
- bfd_boolean written_address_p;
} elf_linker_section_pointers_t;
struct ppc_elf_obj_tdata
if (!htab->elf.dynobj)
htab->elf.dynobj = abfd;
- /* See if the section already exists. */
- s = bfd_get_section_by_name (htab->elf.dynobj, lsect->name);
- if (s == NULL || (s->flags & flags) != flags)
- {
- s = bfd_make_section_anyway (htab->elf.dynobj, lsect->name);
- if (s == NULL
- || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
- return FALSE;
- }
- lsect->section = s;
-
- if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
- && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
+ s = bfd_make_section_anyway (htab->elf.dynobj, lsect->name);
+ if (s == NULL
+ || !bfd_set_section_flags (htab->elf.dynobj, s, flags)
+ || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
return FALSE;
-
- s->size = align_power (s->size, 2);
-
-#ifdef DEBUG
- fprintf (stderr, "Creating section %s, current size = %ld\n",
- lsect->name, (long) s->size);
-#endif
+ lsect->section = s;
return TRUE;
}
static bfd_boolean
elf_create_pointer_linker_section (bfd *abfd,
- struct bfd_link_info *info,
elf_linker_section_t *lsect,
struct elf_link_hash_entry *h,
const Elf_Internal_Rela *rel)
return TRUE;
ptr_linker_section_ptr = &eh->linker_section_pointer;
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
}
else
{
linker_section_ptr->next = *ptr_linker_section_ptr;
linker_section_ptr->addend = rel->r_addend;
linker_section_ptr->lsect = lsect;
- linker_section_ptr->written_address_p = FALSE;
*ptr_linker_section_ptr = linker_section_ptr;
linker_section_ptr->offset = lsect->section->size;
if (info->relocatable)
return TRUE;
+ /* Don't do anything special with non-loaded, non-alloced sections.
+ In particular, any relocs in such sections should not affect GOT
+ and PLT reference counting (ie. we don't allow them to create GOT
+ or PLT entries), there's no possibility or desire to optimize TLS
+ relocs, and there's not much point in propagating relocs to shared
+ libs that the dynamic linker won't relocate. */
+ if ((sec->flags & SEC_ALLOC) == 0)
+ return TRUE;
+
#ifdef DEBUG
_bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
sec, abfd);
&& !ppc_elf_create_linker_section (abfd, info, 0,
&htab->sdata[0]))
return FALSE;
- if (!elf_create_pointer_linker_section (abfd, info,
- &htab->sdata[0], h, rel))
+ if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
+ h, rel))
return FALSE;
break;
&& !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
&htab->sdata[1]))
return FALSE;
- if (!elf_create_pointer_linker_section (abfd, info,
- &htab->sdata[1], h, rel))
+ if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
+ h, rel))
return FALSE;
break;
|| !h->def_regular))))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
- && (sec->flags & SEC_ALLOC) != 0
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
|| !h->def_regular)))
sreloc = bfd_make_section (htab->elf.dynobj, name);
flags = (SEC_HAS_CONTENTS | SEC_READONLY
- | SEC_IN_MEMORY | SEC_LINKER_CREATED);
- if ((sec->flags & SEC_ALLOC) != 0)
- flags |= SEC_ALLOC | SEC_LOAD;
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED
+ | SEC_ALLOC | SEC_LOAD);
if (sreloc == NULL
|| ! bfd_set_section_flags (htab->elf.dynobj,
sreloc, flags)
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel, *relend;
+ if ((sec->flags & SEC_ALLOC) == 0)
+ return TRUE;
+
elf_section_data (sec)->local_dynrel = NULL;
htab = ppc_elf_hash_table (info);
if (s->size == 0)
{
- _bfd_strip_section_from_output (info, s);
+ s->flags |= SEC_EXCLUDE;
continue;
}
*again = FALSE;
- /* Nothing to do if there are no relocations. */
- if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0)
+ /* Nothing to do if there are no relocations, and no need to do
+ anything with non-alloc sections. */
+ if ((isec->flags & SEC_ALLOC) == 0
+ || (isec->flags & SEC_RELOC) == 0
+ || isec->reloc_count == 0)
return TRUE;
trampoff = (isec->size + 3) & (bfd_vma) -4;
return FALSE;
}
\f
-/* Set _SDA_BASE_ and _SDA2_BASE. */
+/* Set _SDA_BASE_, _SDA2_BASE, and sbss start and end syms. They are
+ set here rather than via PROVIDE in the default linker script,
+ because using PROVIDE inside an output section statement results in
+ unnecessary output sections. Using PROVIDE outside an output section
+ statement runs the risk of section alignment affecting where the
+ section starts. */
bfd_boolean
ppc_elf_set_sdata_syms (bfd *obfd, struct bfd_link_info *info)
{
struct ppc_elf_link_hash_table *htab;
unsigned i;
+ asection *s;
+ bfd_vma val;
htab = ppc_elf_hash_table (info);
for (i = 0; i < 2; i++)
{
elf_linker_section_t *lsect = &htab->sdata[i];
- asection *s;
- bfd_vma val;
- struct elf_link_hash_entry *h;
s = lsect->section;
if (s != NULL)
val = s->vma + 32768;
lsect->sym_val = val;
- h = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
- FALSE, FALSE, FALSE);
- if (h != NULL && h->root.type == bfd_link_hash_undefined)
- {
- h->root.type = bfd_link_hash_defined;
- h->root.u.def.section = bfd_abs_section_ptr;
- h->root.u.def.value = val;
- h->def_regular = 1;
- h->type = STT_OBJECT;
- h->other = STV_HIDDEN;
- }
+ _bfd_elf_provide_symbol (info, lsect->sym_name, val);
}
+
+ s = bfd_get_section_by_name (obfd, ".sbss");
+ val = 0;
+ if (s != NULL)
+ val = s->vma;
+ _bfd_elf_provide_symbol (info, "__sbss_start", val);
+ _bfd_elf_provide_symbol (info, "___sbss_start", val);
+ if (s != NULL)
+ val += s->size;
+ _bfd_elf_provide_symbol (info, "__sbss_end", val);
+ _bfd_elf_provide_symbol (info, "___sbss_end", val);
return TRUE;
}
\f
-#define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
-
/* Fill in the address for a pointer generated in a linker section. */
static bfd_vma
-elf_finish_pointer_linker_section (bfd *output_bfd,
- bfd *input_bfd,
- struct bfd_link_info *info,
+elf_finish_pointer_linker_section (bfd *input_bfd,
elf_linker_section_t *lsect,
struct elf_link_hash_entry *h,
bfd_vma relocation,
struct ppc_elf_link_hash_entry *eh;
eh = (struct ppc_elf_link_hash_entry *) h;
- linker_section_ptr
- = elf_find_pointer_linker_section (eh->linker_section_pointer,
- rel->r_addend,
- lsect);
-
- BFD_ASSERT (linker_section_ptr != NULL);
-
- if (! elf_hash_table (info)->dynamic_sections_created
- || (info->shared
- && info->symbolic
- && h->def_regular))
- {
- /* This is actually a static link, or it is a
- -Bsymbolic link and the symbol is defined
- locally. We must initialize this entry in the
- global section.
-
- When doing a dynamic link, we create a .rela.<xxx>
- relocation entry to initialize the value. This
- is done in the finish_dynamic_symbol routine. */
- if (!linker_section_ptr->written_address_p)
- {
- linker_section_ptr->written_address_p = TRUE;
- bfd_put_ptr (output_bfd,
- relocation + linker_section_ptr->addend,
- (lsect->section->contents
- + linker_section_ptr->offset));
- }
- }
+ BFD_ASSERT (eh->elf.def_regular);
+ linker_section_ptr = eh->linker_section_pointer;
}
else
{
/* Handle local symbol. */
unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
+
BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
- BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
- linker_section_ptr = (elf_find_pointer_linker_section
- (elf_local_ptr_offsets (input_bfd)[r_symndx],
- rel->r_addend,
- lsect));
+ linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
+ }
- BFD_ASSERT (linker_section_ptr != NULL);
+ linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
+ rel->r_addend,
+ lsect);
+ BFD_ASSERT (linker_section_ptr != NULL);
- /* Write out pointer if it hasn't been rewritten out before. */
- if (!linker_section_ptr->written_address_p)
- {
- linker_section_ptr->written_address_p = TRUE;
- bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
- lsect->section->contents + linker_section_ptr->offset);
- }
+ /* Offset will always be a multiple of four, so use the bottom bit
+ as a "written" flag. */
+ if ((linker_section_ptr->offset & 1) == 0)
+ {
+ bfd_put_32 (lsect->section->owner,
+ relocation + linker_section_ptr->addend,
+ lsect->section->contents + linker_section_ptr->offset);
+ linker_section_ptr->offset += 1;
}
relocation = (lsect->section->output_offset
- + linker_section_ptr->offset
+ + linker_section_ptr->offset - 1
- 0x8000);
#ifdef DEBUG
{
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
- sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym);
+ sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
}
break;
/* Fall thru. */
+ if ((input_section->flags & SEC_ALLOC) == 0)
+ break;
+ /* Fall thru. */
+
if ((info->shared
&& (h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| !SYMBOL_CALLS_LOCAL (info, h)))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
- && (input_section->flags & SEC_ALLOC) != 0
&& h != NULL
&& h->dynindx != -1
&& !h->non_got_ref
case R_PPC_EMB_SDAI16:
BFD_ASSERT (htab->sdata[0].section != NULL);
relocation
- = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
- &htab->sdata[0], h,
- relocation, rel);
+ = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
+ h, relocation, rel);
break;
/* Indirect .sdata2 relocation. */
case R_PPC_EMB_SDA2I16:
BFD_ASSERT (htab->sdata[1].section != NULL);
relocation
- = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
- &htab->sdata[1], h,
- relocation, rel);
+ = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
+ h, relocation, rel);
break;
/* Handle the TOC16 reloc. We want to use the offset within the .got
if (r != bfd_reloc_ok)
{
- if (sym_name == NULL)
- sym_name = "(null)";
if (r == bfd_reloc_overflow)
{
if (warned)
projects / deliverable / binutils-gdb.git / blobdiff