/* ELF linker support.
- Copyright 1995 Free Software Foundation, Inc.
+ Copyright 1995, 1996 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
return false;
}
}
+\f
/* Add symbols from an ELF archive file to the linker hash table. We
don't use _bfd_generic_link_add_archive_symbols because of a
c = bfd_ardata (abfd)->symdef_count;
if (c == 0)
return true;
- defined = (boolean *) malloc (c * sizeof (boolean));
- included = (boolean *) malloc (c * sizeof (boolean));
+ defined = (boolean *) bfd_malloc (c * sizeof (boolean));
+ included = (boolean *) bfd_malloc (c * sizeof (boolean));
if (defined == (boolean *) NULL || included == (boolean *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
memset (defined, 0, c * sizeof (boolean));
memset (included, 0, c * sizeof (boolean));
sz = bfd_section_size (abfd, s);
msg = (char *) bfd_alloc (abfd, sz);
if (msg == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
if (! bfd_get_section_contents (abfd, s, msg, (file_ptr) 0, sz))
goto error_return;
extsymoff = hdr->sh_info;
}
- buf = (Elf_External_Sym *) malloc (extsymcount * sizeof (Elf_External_Sym));
+ buf = ((Elf_External_Sym *)
+ bfd_malloc (extsymcount * sizeof (Elf_External_Sym)));
if (buf == NULL && extsymcount != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
/* We store a pointer to the hash table entry for each external
symbol. */
bfd_alloc (abfd,
extsymcount * sizeof (struct elf_link_hash_entry *)));
if (sym_hash == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
elf_sym_hashes (abfd) = sym_hash;
if (elf_elfheader (abfd)->e_type != ET_DYN)
int elfsec;
unsigned long link;
- dynbuf = (Elf_External_Dyn *) malloc ((size_t) s->_raw_size);
+ dynbuf = (Elf_External_Dyn *) bfd_malloc ((size_t) s->_raw_size);
if (dynbuf == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf,
(file_ptr) 0, s->_raw_size))
}
if (dyn.d_tag == DT_NEEDED)
{
- struct bfd_elf_link_needed_list *n, **pn;
+ struct bfd_link_needed_list *n, **pn;
char *fnm, *anm;
- n = (struct bfd_elf_link_needed_list *)
- bfd_alloc (abfd,
- sizeof (struct bfd_elf_link_needed_list));
+ n = ((struct bfd_link_needed_list *)
+ bfd_alloc (abfd, sizeof (struct bfd_link_needed_list)));
fnm = bfd_elf_string_from_elf_section (abfd, link,
dyn.d_un.d_val);
if (n == NULL || fnm == NULL)
still implies that the section takes up space in the output
file. */
abfd->sections = NULL;
+ abfd->section_count = 0;
/* If this is the first dynamic object found in the link, create
the special sections required for dynamic linking. */
const char *name;
struct elf_link_hash_entry *h;
boolean definition;
+ boolean size_change_ok, type_change_ok;
boolean new_weakdef;
elf_swap_symbol_in (abfd, esym, &sym);
else
definition = true;
+ size_change_ok = false;
+ type_change_ok = get_elf_backend_data (abfd)->type_change_ok;
if (info->hash->creator->flavour == bfd_target_elf_flavour)
{
/* We need to look up the symbol now in order to get some of
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ /* It's OK to change the type if it used to be a weak
+ definition. */
+ if (h->root.type == bfd_link_hash_defweak
+ || h->root.type == bfd_link_hash_undefweak)
+ type_change_ok = true;
+
+ /* It's OK to change the size if it used to be a weak
+ definition, or if it used to be undefined, or if we will
+ be overriding an old definition. */
+ if (type_change_ok
+ || h->root.type == bfd_link_hash_undefined)
+ size_change_ok = true;
+
/* If we are looking at a dynamic object, and this is a
definition, we need to see if it has already been defined
by some other object. If it has, we want to use the
if (dynamic && definition)
{
if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- sec = bfd_und_section_ptr;
+ || h->root.type == bfd_link_hash_defweak
+ || (h->root.type == bfd_link_hash_common
+ && bind == STB_WEAK))
+ {
+ sec = bfd_und_section_ptr;
+ definition = false;
+ size_change_ok = true;
+ }
}
/* Similarly, if we are not looking at a dynamic object, and
with the new definition. */
h->root.type = bfd_link_hash_undefined;
h->root.u.undef.abfd = h->root.u.def.section->owner;
+ size_change_ok = true;
}
}
int new_flag;
/* Remember the symbol size and type. */
- if (sym.st_size != 0)
+ if (sym.st_size != 0
+ && (definition || h->size == 0))
{
- /* FIXME: We should probably somehow give a warning if
- the symbol size changes. */
+ if (h->size != 0 && h->size != sym.st_size && ! size_change_ok)
+ (*_bfd_error_handler)
+ ("Warning: size of symbol `%s' changed from %lu to %lu in %s",
+ name, (unsigned long) h->size, (unsigned long) sym.st_size,
+ bfd_get_filename (abfd));
+
h->size = sym.st_size;
}
- if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE)
+ if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE
+ && (definition || h->type == STT_NOTYPE))
{
- /* FIXME: We should probably somehow give a warning if
- the symbol type changes. */
+ if (h->type != STT_NOTYPE
+ && h->type != ELF_ST_TYPE (sym.st_info)
+ && ! type_change_ok)
+ (*_bfd_error_handler)
+ ("Warning: type of symbol `%s' changed from %d to %d in %s",
+ name, h->type, ELF_ST_TYPE (sym.st_info),
+ bfd_get_filename (abfd));
+
h->type = ELF_ST_TYPE (sym.st_info);
}
h = *hpp;
if (h != NULL && h != hlook
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
+ && h->root.type == bfd_link_hash_defined
&& h->root.u.def.section == slook
&& h->root.u.def.value == vlook)
{
BFD_ASSERT (s != NULL);
newsize = s->_raw_size + sizeof (Elf_External_Dyn);
- if (s->contents == NULL)
- newcontents = (bfd_byte *) malloc (newsize);
- else
- newcontents = (bfd_byte *) realloc (s->contents, newsize);
+ newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize);
if (newcontents == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
+ return false;
dyn.d_tag = tag;
dyn.d_un.d_val = val;
return true;
}
+\f
/* Read and swap the relocs for a section. They may have been cached.
If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are not NULL,
if (keep_memory)
internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size);
else
- internal_relocs = alloc2 = (Elf_Internal_Rela *) malloc (size);
+ internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size);
if (internal_relocs == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
}
if (external_relocs == NULL)
{
- alloc1 = (PTR) malloc ((size_t) rel_hdr->sh_size);
+ alloc1 = (PTR) bfd_malloc ((size_t) rel_hdr->sh_size);
if (alloc1 == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
external_relocs = alloc1;
}
free (alloc2);
return NULL;
}
+\f
/* Record an assignment to a symbol made by a linker script. We need
this in case some dynamic object refers to this symbol. */
return true;
}
+\f
/* Array used to determine the number of hash table buckets to use
based on the number of symbols there are. If there are fewer than
if (elf_hash_table (info)->dynamic_sections_created)
{
struct elf_info_failed eif;
+ struct elf_link_hash_entry *h;
bfd_size_type strsize;
*sinterpptr = bfd_get_section_by_name (dynobj, ".interp");
/* Add some entries to the .dynamic section. We fill in some of the
values later, in elf_bfd_final_link, but we must add the entries
now so that we know the final size of the .dynamic section. */
- if (elf_link_hash_lookup (elf_hash_table (info), "_init", false,
- false, false) != NULL)
+ h = elf_link_hash_lookup (elf_hash_table (info), "_init", false,
+ false, false);
+ if (h != NULL
+ && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
+ | ELF_LINK_HASH_DEF_REGULAR)) != 0)
{
if (! elf_add_dynamic_entry (info, DT_INIT, 0))
return false;
}
- if (elf_link_hash_lookup (elf_hash_table (info), "_fini", false,
- false, false) != NULL)
+ h = elf_link_hash_lookup (elf_hash_table (info), "_fini", false,
+ false, false);
+ if (h != NULL
+ && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
+ | ELF_LINK_HASH_DEF_REGULAR)) != 0)
{
if (! elf_add_dynamic_entry (info, DT_FINI, 0))
return false;
s->_raw_size = dynsymcount * sizeof (Elf_External_Sym);
s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
if (s->contents == NULL && s->_raw_size != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
+ return false;
/* The first entry in .dynsym is a dummy symbol. */
isym.st_value = 0;
s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8);
s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
if (s->contents == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
+ return false;
memset (s->contents, 0, (size_t) s->_raw_size);
put_word (output_bfd, bucketcount, s->contents);
return true;
}
+\f
/* This routine is used to export all defined symbols into the dynamic
symbol table. It is called via elf_link_hash_traverse. */
return true;
}
+\f
/* Make the backend pick a good value for a dynamic symbol. This is
called via elf_link_hash_traverse, and also calls itself
so we allocate it with bfd_alloc rather than malloc. */
rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size);
if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
p = ((struct elf_link_hash_entry **)
- malloc (o->reloc_count
- * sizeof (struct elf_link_hash_entry *)));
+ bfd_malloc (o->reloc_count
+ * sizeof (struct elf_link_hash_entry *)));
if (p == NULL && o->reloc_count != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
elf_section_data (o)->rel_hashes = p;
pend = p + o->reloc_count;
for (; p < pend; p++)
/* We have now assigned file positions for all the sections except
.symtab and .strtab. We start the .symtab section at the current
file position, and write directly to it. We build the .strtab
- section in memory. When we add .dynsym support, we will build
- that in memory as well (.dynsym is smaller than .symtab). */
+ section in memory. */
abfd->symcount = 0;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
/* sh_name is set in prep_headers. */
else
finfo.symbuf_size = max_sym_count;
finfo.symbuf = ((Elf_External_Sym *)
- malloc (finfo.symbuf_size * sizeof (Elf_External_Sym)));
+ bfd_malloc (finfo.symbuf_size * sizeof (Elf_External_Sym)));
if (finfo.symbuf == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
/* Start writing out the symbol table. The first symbol is always a
dummy symbol. */
/* Allocate some memory to hold information read in from the input
files. */
- finfo.contents = (bfd_byte *) malloc (max_contents_size);
- finfo.external_relocs = (PTR) malloc (max_external_reloc_size);
+ finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
+ finfo.external_relocs = (PTR) bfd_malloc (max_external_reloc_size);
finfo.internal_relocs = ((Elf_Internal_Rela *)
- malloc (max_internal_reloc_count
- * sizeof (Elf_Internal_Rela)));
+ bfd_malloc (max_internal_reloc_count
+ * sizeof (Elf_Internal_Rela)));
finfo.external_syms = ((Elf_External_Sym *)
- malloc (max_sym_count * sizeof (Elf_External_Sym)));
+ bfd_malloc (max_sym_count
+ * sizeof (Elf_External_Sym)));
finfo.internal_syms = ((Elf_Internal_Sym *)
- malloc (max_sym_count * sizeof (Elf_Internal_Sym)));
- finfo.indices = (long *) malloc (max_sym_count * sizeof (long));
- finfo.sections = (asection **) malloc (max_sym_count * sizeof (asection *));
+ bfd_malloc (max_sym_count
+ * sizeof (Elf_Internal_Sym)));
+ finfo.indices = (long *) bfd_malloc (max_sym_count * sizeof (long));
+ finfo.sections = ((asection **)
+ bfd_malloc (max_sym_count * sizeof (asection *)));
if ((finfo.contents == NULL && max_contents_size != 0)
|| (finfo.external_relocs == NULL && max_external_reloc_size != 0)
|| (finfo.internal_relocs == NULL && max_internal_reloc_count != 0)
|| (finfo.internal_syms == NULL && max_sym_count != 0)
|| (finfo.indices == NULL && max_sym_count != 0)
|| (finfo.sections == NULL && max_sym_count != 0))
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
/* Since ELF permits relocations to be against local symbols, we
must have the local symbols available when we do the relocations.
case bfd_link_hash_indirect:
case bfd_link_hash_warning:
+ /* We can't represent these symbols in ELF. A warning symbol
+ may have come from a .gnu.warning.SYMBOL section anyhow. We
+ just put the target symbol in the hash table. If the target
+ symbol does not really exist, don't do anything. */
+ if (h->root.u.i.link->type == bfd_link_hash_new)
+ return true;
return (elf_link_output_extsym
((struct elf_link_hash_entry *) h->root.u.i.link, data));
}
reloc_howto_type *howto;
long indx;
bfd_vma offset;
+ bfd_vma addend;
struct elf_link_hash_entry **rel_hash_ptr;
Elf_Internal_Shdr *rel_hdr;
return false;
}
+ addend = link_order->u.reloc.p->addend;
+
+ /* Figure out the symbol index. */
+ rel_hash_ptr = (elf_section_data (output_section)->rel_hashes
+ + output_section->reloc_count);
+ if (link_order->type == bfd_section_reloc_link_order)
+ {
+ indx = link_order->u.reloc.p->u.section->target_index;
+ BFD_ASSERT (indx != 0);
+ *rel_hash_ptr = NULL;
+ }
+ else
+ {
+ struct elf_link_hash_entry *h;
+
+ /* Treat a reloc against a defined symbol as though it were
+ actually against the section. */
+ h = elf_link_hash_lookup (elf_hash_table (info),
+ link_order->u.reloc.p->u.name,
+ false, false, true);
+ if (h != NULL
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak))
+ {
+ asection *section;
+
+ section = h->root.u.def.section;
+ indx = section->output_section->target_index;
+ *rel_hash_ptr = NULL;
+ /* It seems that we ought to add the symbol value to the
+ addend here, but in practice it has already been added
+ because it was passed to constructor_callback. */
+ addend += section->output_section->vma + section->output_offset;
+ }
+ else if (h != NULL)
+ {
+ /* Setting the index to -2 tells elf_link_output_extsym that
+ this symbol is used by a reloc. */
+ h->indx = -2;
+ *rel_hash_ptr = h;
+ indx = 0;
+ }
+ else
+ {
+ if (! ((*info->callbacks->unattached_reloc)
+ (info, link_order->u.reloc.p->u.name, (bfd *) NULL,
+ (asection *) NULL, (bfd_vma) 0)))
+ return false;
+ indx = 0;
+ }
+ }
+
/* If this is an inplace reloc, we must write the addend into the
object file. */
- if (howto->partial_inplace
- && link_order->u.reloc.p->addend != 0)
+ if (howto->partial_inplace && addend != 0)
{
bfd_size_type size;
bfd_reloc_status_type rstat;
size = bfd_get_reloc_size (howto);
buf = (bfd_byte *) bfd_zmalloc (size);
if (buf == (bfd_byte *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- rstat = _bfd_relocate_contents (howto, output_bfd,
- link_order->u.reloc.p->addend, buf);
+ return false;
+ rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf);
switch (rstat)
{
case bfd_reloc_ok:
? bfd_section_name (output_bfd,
link_order->u.reloc.p->u.section)
: link_order->u.reloc.p->u.name),
- howto->name, link_order->u.reloc.p->addend,
- (bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
+ howto->name, addend, (bfd *) NULL, (asection *) NULL,
+ (bfd_vma) 0)))
{
free (buf);
return false;
return false;
}
- /* Figure out the symbol index. */
- rel_hash_ptr = (elf_section_data (output_section)->rel_hashes
- + output_section->reloc_count);
- if (link_order->type == bfd_section_reloc_link_order)
- {
- indx = link_order->u.reloc.p->u.section->target_index;
- BFD_ASSERT (indx != 0);
- *rel_hash_ptr = NULL;
- }
- else
- {
- struct elf_link_hash_entry *h;
-
- h = elf_link_hash_lookup (elf_hash_table (info),
- link_order->u.reloc.p->u.name,
- false, false, true);
- if (h != NULL)
- {
- /* Setting the index to -2 tells elf_link_output_extsym that
- this symbol is used by a reloc. */
- h->indx = -2;
- *rel_hash_ptr = h;
- indx = 0;
- }
- else
- {
- if (! ((*info->callbacks->unattached_reloc)
- (info, link_order->u.reloc.p->u.name, (bfd *) NULL,
- (asection *) NULL, (bfd_vma) 0)))
- return false;
- indx = 0;
- }
- }
-
/* The address of a reloc is relative to the section in a
relocateable file, and is a virtual address in an executable
file. */
irela.r_offset = offset;
irela.r_info = ELF_R_INFO (indx, howto->type);
- irela.r_addend = link_order->u.reloc.p->addend;
+ irela.r_addend = addend;
erela = ((Elf_External_Rela *) rel_hdr->contents
+ output_section->reloc_count);
elf_swap_reloca_out (output_bfd, &irela, erela);
return true;
}
+\f
+/* Allocate a pointer to live in a linker created section. */
+
+boolean
+elf_create_pointer_linker_section (abfd, info, lsect, h, rel)
+ 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 = ELF_R_SYM (rel->r_info);;
+
+ 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 (_bfd_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 (! elf_link_record_dynamic_symbol (info, h))
+ return false;
+ }
+
+ if (lsect->rel_section)
+ lsect->rel_section->_raw_size += sizeof (Elf_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)
+ {
+ int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
+ register unsigned int i;
+
+ ptr = (elf_linker_section_pointers_t **)
+ bfd_alloc (abfd, num_symbols * sizeof (elf_linker_section_pointers_t *));
+
+ if (!ptr)
+ return false;
+
+ elf_local_ptr_offsets (abfd) = ptr;
+ for (i = 0; i < num_symbols; i++)
+ ptr[i] = (elf_linker_section_pointers_t *)0;
+ }
+
+ /* Has this symbol already been allocated, if so, our work is done */
+ if (_bfd_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 (Elf_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);
+ linker_section_ptr = (elf_linker_section_pointers_t *)
+ bfd_alloc (abfd, sizeof (elf_linker_section_pointers_t));
+
+ 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;
+
+ if (lsect->hole_size && lsect->hole_offset < lsect->max_hole_offset)
+ {
+ linker_section_ptr->offset = lsect->section->_raw_size - lsect->hole_size;
+ lsect->hole_offset += ARCH_SIZE / 8;
+ lsect->sym_offset += ARCH_SIZE / 8;
+ if (lsect->sym_hash) /* Bump up symbol value if needed */
+ lsect->sym_hash->root.u.def.value += ARCH_SIZE / 8;
+ }
+ else
+ linker_section_ptr->offset = lsect->section->_raw_size;
+
+ lsect->section->_raw_size += ARCH_SIZE / 8;
+
+#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;
+}
+
+\f
+#if ARCH_SIZE==64
+#define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR)
+#endif
+#if ARCH_SIZE==32
+#define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR)
+#endif
+
+/* Fill in the address for a pointer generated in alinker section. */
+
+bfd_vma
+elf_finish_pointer_linker_section (output_bfd, input_bfd, info, lsect, h, relocation, rel, relative_reloc)
+ 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) /* global symbol */
+ {
+ linker_section_ptr = _bfd_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 /* local symbol */
+ {
+ unsigned long r_symndx = ELF_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 = _bfd_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;
+
+ /* We need to generate a relative reloc for the dynamic linker. */
+ if (!srel)
+ lsect->rel_section = srel = bfd_get_section_by_name (elf_hash_table (info)->dynobj,
+ lsect->rel_name);
+
+ BFD_ASSERT (srel != NULL);
+
+ outrel.r_offset = (lsect->section->output_section->vma
+ + lsect->section->output_offset
+ + linker_section_ptr->offset);
+ outrel.r_info = ELF_R_INFO (0, relative_reloc);
+ outrel.r_addend = 0;
+ elf_swap_reloca_out (output_bfd, &outrel,
+ (((Elf_External_Rela *)
+ lsect->section->contents)
+ + lsect->section->reloc_count));
+ ++lsect->section->reloc_count;
+ }
+ }
+ }
+
+ 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;
+}
projects / deliverable / binutils-gdb.git / blobdiff