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authorAlan Modra <amodra@gmail.com>2003-07-04 01:50:12 +0000
committerAlan Modra <amodra@gmail.com>2003-07-04 01:50:12 +0000
commit3dab13f62bf5909bbae61ad8149e139b622f5f2b (patch)
tree9f7a5f0ee27aeb9623ba8901ab3713ba7183d78b /bfd/elf32-ppc.c
parent100f2e98f84dd197660e5b656e7bd7fceaf0729e (diff)
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* elf-bfd.h (_bfd_elf_create_linker_section) Don't declare.
(_bfd_elf_find_pointer_linker_section): Likewise. (bfd_elf32_create_pointer_linker_section): Likewise. (bfd_elf32_finish_pointer_linker_section): Likewise. (bfd_elf64_create_pointer_linker_section): Likewise. (bfd_elf64_finish_pointer_linker_section): Likewise. (_bfd_elf_make_linker_section_rela): Likewise. * elfcode.h (elf_create_pointer_linker_section): Don't define. (elf_finish_pointer_linker_section): Likewise. * elflink.c (_bfd_elf_make_linker_section_rela): Delete. (_bfd_elf_create_linker_section): Move this function.. (_bfd_elf_find_pointer_linker_section): ..and this.. * elflink.h (elf_create_pointer_linker_section): ..and this.. (elf_finish_pointer_linker_section): ..and this.. * elf32-ppc.c: ..to here, renaming to the following, and adjusting calls. (elf_create_linker_section): Convert to C90, tidy. (elf_find_pointer_linker_section): Likewise. (elf_create_pointer_linker_section): Likewise. (elf_finish_pointer_linker_section): Likewise. * elf32-i370.c: Delete #if 0 code.
Diffstat (limited to 'bfd/elf32-ppc.c')
-rw-r--r--bfd/elf32-ppc.c384
1 files changed, 369 insertions, 15 deletions
diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c
index 2e1353f..f2b987c 100644
--- a/bfd/elf32-ppc.c
+++ b/bfd/elf32-ppc.c
@@ -2169,6 +2169,360 @@ ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
return TRUE;
}
+/* Create a special linker section, or return a pointer to a linker
+ section already created */
+
+static elf_linker_section_t *
+elf_create_linker_section (bfd *abfd,
+ struct bfd_link_info *info,
+ enum elf_linker_section_enum which,
+ elf_linker_section_t *defaults)
+{
+ bfd *dynobj = elf_hash_table (info)->dynobj;
+ elf_linker_section_t *lsect;
+
+ /* Record the first bfd section that needs the special section */
+ if (!dynobj)
+ dynobj = elf_hash_table (info)->dynobj = abfd;
+
+ /* If this is the first time, create the section */
+ lsect = elf_linker_section (dynobj, which);
+ if (!lsect)
+ {
+ asection *s;
+ bfd_size_type amt = sizeof (elf_linker_section_t);
+
+ lsect = bfd_alloc (dynobj, amt);
+
+ *lsect = *defaults;
+ elf_linker_section (dynobj, which) = lsect;
+ lsect->which = which;
+ lsect->hole_written_p = FALSE;
+
+ /* See if the sections already exist */
+ lsect->section = s = bfd_get_section_by_name (dynobj, lsect->name);
+ if (!s || (s->flags & defaults->flags) != defaults->flags)
+ {
+ lsect->section = s = bfd_make_section_anyway (dynobj, lsect->name);
+
+ if (s == NULL)
+ return NULL;
+
+ bfd_set_section_flags (dynobj, s, defaults->flags);
+ bfd_set_section_alignment (dynobj, s, lsect->alignment);
+ }
+ else if (bfd_get_section_alignment (dynobj, s) < lsect->alignment)
+ bfd_set_section_alignment (dynobj, s, lsect->alignment);
+
+ s->_raw_size = align_power (s->_raw_size, lsect->alignment);
+
+ /* Is there a hole we have to provide? If so check whether the
+ segment is too big already */
+ if (lsect->hole_size)
+ {
+ lsect->hole_offset = s->_raw_size;
+ s->_raw_size += lsect->hole_size;
+ if (lsect->hole_offset > lsect->max_hole_offset)
+ {
+ (*_bfd_error_handler)
+ (_("%s: Section %s is too large to add hole of %ld bytes"),
+ bfd_get_filename (abfd),
+ lsect->name,
+ (long) lsect->hole_size);
+
+ bfd_set_error (bfd_error_bad_value);
+ return NULL;
+ }
+ }
+
+#ifdef DEBUG
+ fprintf (stderr, "Creating section %s, current size = %ld\n",
+ lsect->name, (long) s->_raw_size);
+#endif
+
+ if (lsect->sym_name)
+ {
+ struct elf_link_hash_entry *h;
+ struct bfd_link_hash_entry *bh;
+
+#ifdef DEBUG
+ fprintf (stderr, "Adding %s to section %s\n",
+ lsect->sym_name,
+ lsect->name);
+#endif
+ bh = bfd_link_hash_lookup (info->hash, lsect->sym_name,
+ FALSE, FALSE, FALSE);
+
+ if ((bh == NULL || bh->type == bfd_link_hash_undefined)
+ && !(_bfd_generic_link_add_one_symbol
+ (info, abfd, lsect->sym_name, BSF_GLOBAL, s,
+ (lsect->hole_size
+ ? s->_raw_size - lsect->hole_size + lsect->sym_offset
+ : lsect->sym_offset),
+ NULL, FALSE,
+ get_elf_backend_data (abfd)->collect, &bh)))
+ return NULL;
+ h = (struct elf_link_hash_entry *) bh;
+
+ if ((defaults->which != LINKER_SECTION_SDATA)
+ && (defaults->which != LINKER_SECTION_SDATA2))
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_DYNAMIC;
+
+ h->type = STT_OBJECT;
+ lsect->sym_hash = h;
+
+ if (info->shared
+ && ! _bfd_elf_link_record_dynamic_symbol (info, h))
+ return NULL;
+ }
+ }
+
+ return lsect;
+}
+
+/* Find a linker generated pointer with a given addend and type. */
+
+static elf_linker_section_pointers_t *
+elf_find_pointer_linker_section
+ (elf_linker_section_pointers_t *linker_pointers,
+ bfd_vma addend,
+ elf_linker_section_enum_t which)
+{
+ for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
+ if (which == linker_pointers->which && addend == linker_pointers->addend)
+ return linker_pointers;
+
+ return NULL;
+}
+
+/* Allocate a pointer to live in a linker created section. */
+
+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)
+{
+ elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
+ elf_linker_section_pointers_t *linker_section_ptr;
+ unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
+ bfd_size_type amt;
+
+ BFD_ASSERT (lsect != NULL);
+
+ /* Is this a global symbol? */
+ if (h != NULL)
+ {
+ /* Has this symbol already been allocated? If so, our work is done. */
+ if (elf_find_pointer_linker_section (h->linker_section_pointer,
+ rel->r_addend,
+ lsect->which))
+ return TRUE;
+
+ ptr_linker_section_ptr = &h->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;
+ }
+
+ if (lsect->rel_section)
+ lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
+ }
+ else
+ {
+ /* Allocation of a pointer to a local symbol. */
+ elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
+
+ /* Allocate a table to hold the local symbols if first time. */
+ if (!ptr)
+ {
+ unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
+ register unsigned int i;
+
+ amt = num_symbols;
+ amt *= sizeof (elf_linker_section_pointers_t *);
+ ptr = bfd_alloc (abfd, amt);
+
+ if (!ptr)
+ return FALSE;
+
+ elf_local_ptr_offsets (abfd) = ptr;
+ for (i = 0; i < num_symbols; i++)
+ ptr[i] = NULL;
+ }
+
+ /* Has this symbol already been allocated? If so, our work is done. */
+ if (elf_find_pointer_linker_section (ptr[r_symndx],
+ rel->r_addend,
+ lsect->which))
+ return TRUE;
+
+ ptr_linker_section_ptr = &ptr[r_symndx];
+
+ if (info->shared)
+ {
+ /* If we are generating a shared object, we need to
+ output a R_<xxx>_RELATIVE reloc so that the
+ dynamic linker can adjust this GOT entry. */
+ BFD_ASSERT (lsect->rel_section != NULL);
+ lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
+ }
+ }
+
+ /* Allocate space for a pointer in the linker section, and allocate
+ a new pointer record from internal memory. */
+ BFD_ASSERT (ptr_linker_section_ptr != NULL);
+ amt = sizeof (elf_linker_section_pointers_t);
+ linker_section_ptr = bfd_alloc (abfd, amt);
+
+ if (!linker_section_ptr)
+ return FALSE;
+
+ linker_section_ptr->next = *ptr_linker_section_ptr;
+ linker_section_ptr->addend = rel->r_addend;
+ linker_section_ptr->which = lsect->which;
+ linker_section_ptr->written_address_p = FALSE;
+ *ptr_linker_section_ptr = linker_section_ptr;
+
+ linker_section_ptr->offset = lsect->section->_raw_size;
+ lsect->section->_raw_size += 4;
+
+#ifdef DEBUG
+ fprintf (stderr,
+ "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
+ lsect->name, (long) linker_section_ptr->offset,
+ (long) lsect->section->_raw_size);
+#endif
+
+ return TRUE;
+}
+
+#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_linker_section_t *lsect,
+ struct elf_link_hash_entry *h,
+ bfd_vma relocation,
+ const Elf_Internal_Rela *rel,
+ int relative_reloc)
+{
+ elf_linker_section_pointers_t *linker_section_ptr;
+
+ BFD_ASSERT (lsect != NULL);
+
+ if (h != NULL)
+ {
+ /* Handle global symbol. */
+ linker_section_ptr
+ = elf_find_pointer_linker_section (h->linker_section_pointer,
+ rel->r_addend,
+ lsect->which);
+
+ BFD_ASSERT (linker_section_ptr != NULL);
+
+ if (! elf_hash_table (info)->dynamic_sections_created
+ || (info->shared
+ && info->symbolic
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_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));
+ }
+ }
+ }
+ 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->which));
+
+ 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);
+
+ if (info->shared)
+ {
+ asection *srel = lsect->rel_section;
+ Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
+ bfd_byte *erel;
+ struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
+ unsigned int i;
+
+ /* We need to generate a relative reloc for the dynamic
+ linker. */
+ if (!srel)
+ {
+ srel = bfd_get_section_by_name (elf_hash_table (info)->dynobj,
+ lsect->rel_name);
+ lsect->rel_section = srel;
+ }
+
+ BFD_ASSERT (srel != NULL);
+
+ for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
+ {
+ outrel[i].r_offset = (lsect->section->output_section->vma
+ + lsect->section->output_offset
+ + linker_section_ptr->offset);
+ outrel[i].r_info = 0;
+ outrel[i].r_addend = 0;
+ }
+ outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
+ erel = lsect->section->contents;
+ erel += (elf_section_data (lsect->section)->rel_count++
+ * sizeof (Elf32_External_Rela));
+ bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
+ }
+ }
+ }
+
+ relocation = (lsect->section->output_offset
+ + linker_section_ptr->offset
+ - lsect->hole_offset
+ - lsect->sym_offset);
+
+#ifdef DEBUG
+ fprintf (stderr,
+ "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
+ lsect->name, (long) relocation, (long) relocation);
+#endif
+
+ /* Subtract out the addend, because it will get added back in by the normal
+ processing. */
+ return relocation - linker_section_ptr->addend;
+}
+
/* Create a special linker section */
static elf_linker_section_t *
ppc_elf_create_linker_section (bfd *abfd,
@@ -2233,7 +2587,7 @@ ppc_elf_create_linker_section (bfd *abfd,
break;
}
- lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults);
+ lsect = elf_create_linker_section (abfd, info, which, &defaults);
}
return lsect;
@@ -2318,7 +2672,10 @@ ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
asection *s;
flagword flags;
- if (!ppc_elf_create_got (abfd, info))
+ htab = ppc_elf_hash_table (info);
+
+ if (htab->got == NULL
+ && !ppc_elf_create_got (abfd, info))
return FALSE;
if (!_bfd_elf_create_dynamic_sections (abfd, info))
@@ -2327,7 +2684,6 @@ ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
| SEC_LINKER_CREATED);
- htab = ppc_elf_hash_table (info);
htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
if (s == NULL
@@ -3220,8 +3576,8 @@ ppc_elf_check_relocs (bfd *abfd,
bad_shared_reloc (abfd, r_type);
return FALSE;
}
- if (!bfd_elf32_create_pointer_linker_section (abfd, info,
- htab->sdata, h, rel))
+ if (!elf_create_pointer_linker_section (abfd, info,
+ htab->sdata, h, rel))
return FALSE;
break;
@@ -3232,8 +3588,8 @@ ppc_elf_check_relocs (bfd *abfd,
bad_shared_reloc (abfd, r_type);
return FALSE;
}
- if (!bfd_elf32_create_pointer_linker_section (abfd, info,
- htab->sdata2, h, rel))
+ if (!elf_create_pointer_linker_section (abfd, info,
+ htab->sdata2, h, rel))
return FALSE;
break;
@@ -5008,20 +5364,18 @@ ppc_elf_relocate_section (bfd *output_bfd,
case R_PPC_EMB_SDAI16:
BFD_ASSERT (htab->sdata != NULL);
relocation
- = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd,
- info, htab->sdata, h,
- relocation, rel,
- R_PPC_RELATIVE);
+ = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
+ htab->sdata, h, relocation,
+ rel, R_PPC_RELATIVE);
break;
/* Indirect .sdata2 relocation. */
case R_PPC_EMB_SDA2I16:
BFD_ASSERT (htab->sdata2 != NULL);
relocation
- = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd,
- info, htab->sdata2, h,
- relocation, rel,
- R_PPC_RELATIVE);
+ = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
+ htab->sdata2, h, relocation,
+ rel, R_PPC_RELATIVE);
break;
/* Handle the TOC16 reloc. We want to use the offset within the .got