/* Intel 80386/80486-specific support for 32-bit ELF
- Copyright 1993 Free Software Foundation, Inc.
+ Copyright 1993, 1994, 1995 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "libelf.h"
-static CONST struct reloc_howto_struct *elf_i386_reloc_type_lookup
+static reloc_howto_type *elf_i386_reloc_type_lookup
PARAMS ((bfd *, bfd_reloc_code_real_type));
static void elf_i386_info_to_howto
PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
static void elf_i386_info_to_howto_rel
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
-static boolean elf_i386_create_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean elf_i386_create_got_section
- PARAMS ((bfd *, struct bfd_link_info *));
static boolean elf_i386_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
#define TRACE(str)
#endif
-static CONST struct reloc_howto_struct *
+static reloc_howto_type *
elf_i386_reloc_type_lookup (abfd, code)
bfd *abfd;
bfd_reloc_code_real_type code;
/* The first entry in an absolute procedure linkage table looks like
this. See the SVR4 ABI i386 supplement to see how this works. */
-static bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] =
+static const bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] =
{
0xff, 0x35, /* pushl contents of address */
0, 0, 0, 0, /* replaced with address of .got + 4. */
/* Subsequent entries in an absolute procedure linkage table look like
this. */
-static bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
+static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
{
0xff, 0x25, /* jmp indirect */
0, 0, 0, 0, /* replaced with address of this symbol in .got. */
/* The first entry in a PIC procedure linkage table look like this. */
-static bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] =
+static const bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] =
{
0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
/* Subsequent entries in a PIC procedure linkage table look like this. */
-static bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
+static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
{
0xff, 0xa3, /* jmp *offset(%ebx) */
0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
0, 0, 0, 0 /* replaced with offset to start of .plt. */
};
-/* Create dynamic sections when linking against a dynamic object. */
-
-static boolean
-elf_i386_create_dynamic_sections (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- flagword flags;
- register asection *s;
-
- /* We need to create .plt, .rel.plt, .got, .got.plt, .dynbss, and
- .rel.bss sections. */
-
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
-
- s = bfd_make_section (abfd, ".plt");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY | SEC_CODE)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- s = bfd_make_section (abfd, ".rel.plt");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- if (! elf_i386_create_got_section (abfd, info))
- return false;
-
- /* The .dynbss section is a place to put symbols which are defined
- by dynamic objects, are referenced by regular objects, and are
- not functions. We must allocate space for them in the process
- image and use a R_386_COPY reloc to tell the dynamic linker to
- initialize them at run time. The linker script puts the .dynbss
- section into the .bss section of the final image. */
- s = bfd_make_section (abfd, ".dynbss");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
- return false;
-
- /* The .rel.bss section holds copy relocs. This section is not
- normally needed. We need to create it here, though, so that the
- linker will map it to an output section. We can't just create it
- only if we need it, because we will not know whether we need it
- until we have seen all the input files, and the first time the
- main linker code calls BFD after examining all the input files
- (size_dynamic_sections) the input sections have already been
- mapped to the output sections. If the section turns out not to
- be needed, we can discard it later. We will never need this
- section when generating a shared object, since they do not use
- copy relocs. */
- if (! info->shared)
- {
- s = bfd_make_section (abfd, ".rel.bss");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
- }
-
- return true;
-}
-
-/* Create the .got section to hold the global offset table, and the
- .got.plt section to hold procedure linkage table GOT entries. The
- linker script will put .got.plt into the output .got section. */
-
-static boolean
-elf_i386_create_got_section (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- flagword flags;
- register asection *s;
- struct elf_link_hash_entry *h;
-
- /* This function may be called more than once. */
- if (bfd_get_section_by_name (abfd, ".got") != NULL)
- return true;
-
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
-
- s = bfd_make_section (abfd, ".got");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- s = bfd_make_section (abfd, ".got.plt");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
- .got.plt section, which will be placed at the start of the output
- .got section. We don't do this in the linker script because we
- don't want to define the symbol if we are not creating a global
- offset table. */
- h = NULL;
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, (bfd_vma) 0,
- (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
- (struct bfd_link_hash_entry **) &h)))
- return false;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && ! bfd_elf32_link_record_dynamic_symbol (info, h))
- return false;
-
- /* The first three global offset table entries are reserved. */
- s->_raw_size += 3 * 4;
-
- return true;
-}
-
/* Look through the relocs for a section during the first phase, and
allocate space in the global offset table or procedure linkage
table. */
case R_386_GOTOFF:
case R_386_GOTPC:
elf_hash_table (info)->dynobj = dynobj = abfd;
- if (! elf_i386_create_got_section (dynobj, info))
+ if (! _bfd_elf_create_got_section (dynobj, info))
return false;
break;
{
const char *name;
- name = (elf_string_from_elf_section
+ name = (bfd_elf_string_from_elf_section
(abfd,
elf_elfheader (abfd)->e_shstrndx,
elf_section_data (sec)->rel_hdr.sh_name));
&& (h->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR) != 0
&& (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0
- && (elf_elfheader (h->root.u.def.section->owner)->e_type
- == ET_DYN)
- && h->root.type == bfd_link_hash_defined
- && (bfd_get_flavour (h->root.u.def.section->owner)
- == bfd_target_elf_flavour)
- && h->root.u.def.section->output_section == NULL)));
+ & ELF_LINK_HASH_DEF_REGULAR) == 0)));
/* If this is a function, put it in the procedure linkage table. We
will fill in the contents of the procedure linkage table later,
real definition first, and we can just use the same value. */
if (h->weakdef != NULL)
{
- BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined);
+ BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
+ || h->weakdef->root.type == bfd_link_hash_defweak);
h->root.u.def.section = h->weakdef->root.u.def.section;
h->root.u.def.value = h->weakdef->root.u.def.value;
return true;
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- if (h->root.type == bfd_link_hash_defined)
+ 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_386_GOTPC
+ sec->output_section->vma
+ sec->output_offset);
}
- else if (h->root.type == bfd_link_hash_weak)
+ else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
else if (info->shared)
relocation = 0;
case R_386_32:
case R_386_PC32:
if (info->shared
- && (input_section->flags & SEC_ALLOC) != 0)
+ && (input_section->flags & SEC_ALLOC) != 0
+ && (r_type != R_386_PC32 || h != NULL))
{
Elf_Internal_Rel outrel;
{
const char *name;
- name = (elf_string_from_elf_section
+ name = (bfd_elf_string_from_elf_section
(input_bfd,
elf_elfheader (input_bfd)->e_shstrndx,
elf_section_data (input_section)->rel_hdr.sh_name));
name = h->root.root.string;
else
{
- name = elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
+ name = bfd_elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
if (name == NULL)
return false;
if (*name == '\0')
/* This symbol needs a copy reloc. Set it up. */
BFD_ASSERT (h->dynindx != -1
- && h->root.type == bfd_link_hash_defined);
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak));
s = bfd_get_section_by_name (h->root.u.def.section->owner,
".rel.bss");
#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
#define ELF_MAXPAGESIZE 0x1000
#define elf_backend_create_dynamic_sections \
- elf_i386_create_dynamic_sections
+ _bfd_elf_create_dynamic_sections
#define elf_backend_check_relocs elf_i386_check_relocs
#define elf_backend_adjust_dynamic_symbol \
elf_i386_adjust_dynamic_symbol
elf_i386_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections \
elf_i386_finish_dynamic_sections
+#define elf_backend_want_got_plt 1
+#define elf_backend_plt_readonly 0
+#define elf_backend_want_plt_sym 0
#include "elf32-target.h"
projects / deliverable / binutils-gdb.git / blobdiff