Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2004, 2005, 2006 Free Software Foundation, Inc.
Contributed by Matt Thomas <matt@3am-software.com>.
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/vax.h"
static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
struct bfd_hash_table *,
const char *);
static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
asection *, const Elf_Internal_Rela *);
static asection *elf_vax_gc_mark_hook (asection *, struct bfd_link_info *,
Elf_Internal_Rela *,
struct elf_link_hash_entry *,
Elf_Internal_Sym *);
static bfd_boolean elf_vax_gc_sweep_hook (bfd *, struct bfd_link_info *,
asection *,
const Elf_Internal_Rela *);
static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
struct elf_link_hash_entry *);
static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
bfd *, asection *, bfd_byte *,
Elf_Internal_Rela *,
Elf_Internal_Sym *, asection **);
static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
struct elf_link_hash_entry *,
Elf_Internal_Sym *);
static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
struct bfd_link_info *);
static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, PTR);
static reloc_howto_type howto_table[] = {
HOWTO (R_VAX_NONE,
0,
0,
0,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_VAX_NONE",
FALSE,
0,
0x00000000,
FALSE),
HOWTO (R_VAX_32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_VAX_32",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_VAX_16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_VAX_16",
FALSE,
0,
0x0000ffff,
FALSE),
HOWTO (R_VAX_8,
0,
0,
8,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_VAX_8",
FALSE,
0,
0x000000ff,
FALSE),
HOWTO (R_VAX_PC32,
0,
2,
32,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_VAX_PC32",
FALSE,
0,
0xffffffff,
TRUE),
HOWTO (R_VAX_PC16,
0,
1,
16,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_VAX_PC16",
FALSE,
0,
0x0000ffff,
TRUE),
HOWTO (R_VAX_PC8,
0,
0,
8,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_VAX_PC8",
FALSE,
0,
0x000000ff,
TRUE),
HOWTO (R_VAX_GOT32,
0,
2,
32,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_VAX_GOT32",
FALSE,
0,
0xffffffff,
TRUE),
EMPTY_HOWTO (-1),
EMPTY_HOWTO (-1),
EMPTY_HOWTO (-1),
EMPTY_HOWTO (-1),
EMPTY_HOWTO (-1),
HOWTO (R_VAX_PLT32,
0,
2,
32,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_VAX_PLT32",
FALSE,
0,
0xffffffff,
TRUE),
EMPTY_HOWTO (-1),
EMPTY_HOWTO (-1),
EMPTY_HOWTO (-1),
EMPTY_HOWTO (-1),
EMPTY_HOWTO (-1),
HOWTO (R_VAX_COPY,
0,
0,
0,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_VAX_COPY",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_VAX_GLOB_DAT,
0,
2,
32,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_VAX_GLOB_DAT",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_VAX_JMP_SLOT,
0,
2,
32,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_VAX_JMP_SLOT",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_VAX_RELATIVE,
0,
2,
32,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_VAX_RELATIVE",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_VAX_GNU_VTINHERIT,
0,
2,
0,
FALSE,
0,
complain_overflow_dont,
NULL,
"R_VAX_GNU_VTINHERIT",
FALSE,
0,
0,
FALSE),
HOWTO (R_VAX_GNU_VTENTRY,
0,
2,
0,
FALSE,
0,
complain_overflow_dont,
_bfd_elf_rel_vtable_reloc_fn,
"R_VAX_GNU_VTENTRY",
FALSE,
0,
0,
FALSE),
};
static void
rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
}
#define elf_info_to_howto rtype_to_howto
static const struct
{
bfd_reloc_code_real_type bfd_val;
int elf_val;
} reloc_map[] = {
{ BFD_RELOC_NONE, R_VAX_NONE },
{ BFD_RELOC_32, R_VAX_32 },
{ BFD_RELOC_16, R_VAX_16 },
{ BFD_RELOC_8, R_VAX_8 },
{ BFD_RELOC_32_PCREL, R_VAX_PC32 },
{ BFD_RELOC_16_PCREL, R_VAX_PC16 },
{ BFD_RELOC_8_PCREL, R_VAX_PC8 },
{ BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
{ BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
{ BFD_RELOC_NONE, R_VAX_COPY },
{ BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
{ BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
{ BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
{ BFD_RELOC_CTOR, R_VAX_32 },
{ BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
{ BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
};
static reloc_howto_type *
reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
{
unsigned int i;
for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
{
if (reloc_map[i].bfd_val == code)
return &howto_table[reloc_map[i].elf_val];
}
return 0;
}
#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
#define ELF_ARCH bfd_arch_vax
section. */
#define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
#define PLT_ENTRY_SIZE 12
the SVR4 ABI VAX supplement to see how this works. */
static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
{
0xdd, 0xef,
0, 0, 0, 0,
0x17, 0xff,
0, 0, 0, 0,
};
static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
{
0x40, 0x00,
0x16, 0xef,
0, 0, 0, 0,
0, 0, 0, 0,
};
decides to copy in check_relocs for each symbol. This is so that it
can discard PC relative relocs if it doesn't need them when linking
with -Bsymbolic. We store the information in a field extending the
regular ELF linker hash table. */
copied for a given symbol. */
struct elf_vax_pcrel_relocs_copied
{
struct elf_vax_pcrel_relocs_copied *next;
asection *section;
bfd_size_type count;
};
struct elf_vax_link_hash_entry
{
struct elf_link_hash_entry root;
struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
bfd_vma got_addend;
};
struct elf_vax_link_hash_table
{
struct elf_link_hash_table root;
};
static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
PTR);
static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
PTR);
#define elf_vax_link_hash_traverse(table, func, info) \
(elf_link_hash_traverse \
(&(table)->root, \
(bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
(info)))
#define elf_vax_hash_table(p) ((struct elf_vax_link_hash_table *) (p)->hash)
static struct bfd_hash_entry *
elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
struct bfd_hash_table *table,
const char *string)
{
struct elf_vax_link_hash_entry *ret =
(struct elf_vax_link_hash_entry *) entry;
subclass. */
if (ret == NULL)
ret = ((struct elf_vax_link_hash_entry *)
bfd_hash_allocate (table,
sizeof (struct elf_vax_link_hash_entry)));
if (ret == NULL)
return (struct bfd_hash_entry *) ret;
ret = ((struct elf_vax_link_hash_entry *)
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
table, string));
if (ret != NULL)
{
ret->pcrel_relocs_copied = NULL;
}
return (struct bfd_hash_entry *) ret;
}
static struct bfd_link_hash_table *
elf_vax_link_hash_table_create (bfd *abfd)
{
struct elf_vax_link_hash_table *ret;
bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
ret = bfd_malloc (amt);
if (ret == NULL)
return NULL;
if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
elf_vax_link_hash_newfunc,
sizeof (struct elf_vax_link_hash_entry)))
{
free (ret);
return NULL;
}
return &ret->root.root;
}
static bfd_boolean
elf32_vax_set_private_flags (bfd *abfd, flagword flags)
{
elf_elfheader (abfd)->e_flags = flags;
elf_flags_init (abfd) = TRUE;
return TRUE;
}
object file when linking. */
static bfd_boolean
elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
{
flagword out_flags;
flagword in_flags;
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
return TRUE;
in_flags = elf_elfheader (ibfd)->e_flags;
out_flags = elf_elfheader (obfd)->e_flags;
if (!elf_flags_init (obfd))
{
elf_flags_init (obfd) = TRUE;
elf_elfheader (obfd)->e_flags = in_flags;
}
return TRUE;
}
static bfd_boolean
elf32_vax_print_private_bfd_data (bfd *abfd, PTR ptr)
{
FILE *file = (FILE *) ptr;
BFD_ASSERT (abfd != NULL && ptr != NULL);
_bfd_elf_print_private_bfd_data (abfd, ptr);
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
fprintf (file, _(" [nonpic]"));
if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
fprintf (file, _(" [d-float]"));
if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
fprintf (file, _(" [g-float]"));
fputc ('\n', file);
return TRUE;
}
allocate space in the global offset table or procedure linkage
table. */
static bfd_boolean
elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
const Elf_Internal_Rela *relocs)
{
bfd *dynobj;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
asection *sgot;
asection *srelgot;
asection *sreloc;
if (info->relocatable)
return TRUE;
dynobj = elf_hash_table (info)->dynobj;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
sgot = NULL;
srelgot = NULL;
sreloc = NULL;
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
unsigned long r_symndx;
struct elf_link_hash_entry *h;
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
h = NULL;
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
}
switch (ELF32_R_TYPE (rel->r_info))
{
case R_VAX_GOT32:
if (h != NULL
&& strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
break;
if (dynobj == NULL)
{
elf_hash_table (info)->dynobj = dynobj = abfd;
if (!_bfd_elf_create_got_section (dynobj, info))
return FALSE;
}
if (sgot == NULL)
{
sgot = bfd_get_section_by_name (dynobj, ".got");
BFD_ASSERT (sgot != NULL);
}
if (srelgot == NULL
&& (h != NULL || info->shared))
{
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
if (srelgot == NULL)
{
srelgot = bfd_make_section_with_flags (dynobj,
".rela.got",
(SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_READONLY));
if (srelgot == NULL
|| !bfd_set_section_alignment (dynobj, srelgot, 2))
return FALSE;
}
}
if (h != NULL)
{
struct elf_vax_link_hash_entry *eh;
eh = (struct elf_vax_link_hash_entry *) h;
if (h->got.refcount == -1)
{
h->got.refcount = 1;
eh->got_addend = rel->r_addend;
}
else
{
h->got.refcount++;
if (eh->got_addend != (bfd_vma) rel->r_addend)
(*_bfd_error_handler)
(_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
bfd_get_filename (abfd), rel->r_addend,
h->root.root.string,
eh->got_addend);
}
}
break;
case R_VAX_PLT32:
actually build the entry in adjust_dynamic_symbol,
because this might be a case of linking PIC code which is
never referenced by a dynamic object, in which case we
don't need to generate a procedure linkage table entry
after all. */
creating a procedure linkage table entry. */
if (h == NULL)
continue;
h->needs_plt = 1;
if (h->plt.refcount == -1)
h->plt.refcount = 1;
else
h->plt.refcount++;
break;
case R_VAX_PC8:
case R_VAX_PC16:
case R_VAX_PC32:
symbol, we need to copy the reloc into the shared library.
However when linking with -Bsymbolic and this is a global
symbol which is defined in an object we are including in the
link (i.e., DEF_REGULAR is set), then we can resolve the
reloc directly. At this point we have not seen all the input
files, so it is possible that DEF_REGULAR is not set now but
will be set later (it is never cleared). We account for that
possibility below by storing information in the
pcrel_relocs_copied field of the hash table entry. */
if (!(info->shared
&& (sec->flags & SEC_ALLOC) != 0
&& h != NULL
&& (!info->symbolic
|| !h->def_regular)))
{
if (h != NULL)
{
it turns out to be a function defined by a dynamic
object. */
if (h->plt.refcount == -1)
h->plt.refcount = 1;
else
h->plt.refcount++;
}
break;
}
case R_VAX_8:
case R_VAX_16:
case R_VAX_32:
if (h != NULL)
{
turns out to be a function defined by a dynamic object. */
if (h->plt.refcount == -1)
h->plt.refcount = 1;
else
h->plt.refcount++;
}
reloc into the shared library. */
if (info->shared
&& (sec->flags & SEC_ALLOC) != 0)
{
reloc types into the output file. We create a reloc
section in dynobj and make room for this reloc. */
if (sreloc == NULL)
{
const char *name;
name = (bfd_elf_string_from_elf_section
(abfd,
elf_elfheader (abfd)->e_shstrndx,
elf_section_data (sec)->rel_hdr.sh_name));
if (name == NULL)
return FALSE;
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
&& strcmp (bfd_get_section_name (abfd, sec),
name + 5) == 0);
sreloc = bfd_get_section_by_name (dynobj, name);
if (sreloc == NULL)
{
sreloc = bfd_make_section_with_flags (dynobj,
name,
(SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_READONLY));
if (sreloc == NULL
|| !bfd_set_section_alignment (dynobj, sreloc, 2))
return FALSE;
}
if (sec->flags & SEC_READONLY)
info->flags |= DF_TEXTREL;
}
sreloc->size += sizeof (Elf32_External_Rela);
PC relative relocations we have entered for this symbol,
so that we can discard them again if the symbol is later
defined by a regular object. Note that this function is
only called if we are using a vaxelf linker hash table,
which means that h is really a pointer to an
elf_vax_link_hash_entry. */
if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
|| ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
|| ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
&& info->symbolic)
{
struct elf_vax_link_hash_entry *eh;
struct elf_vax_pcrel_relocs_copied *p;
eh = (struct elf_vax_link_hash_entry *) h;
for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
if (p->section == sreloc)
break;
if (p == NULL)
{
p = ((struct elf_vax_pcrel_relocs_copied *)
bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
if (p == NULL)
return FALSE;
p->next = eh->pcrel_relocs_copied;
eh->pcrel_relocs_copied = p;
p->section = sreloc;
p->count = 0;
}
++p->count;
}
}
break;
Reconstruct it for later use during GC. */
case R_VAX_GNU_VTINHERIT:
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
return FALSE;
break;
used. Record for later use during GC. */
case R_VAX_GNU_VTENTRY:
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
return FALSE;
break;
default:
break;
}
}
return TRUE;
}
relocation. */
static asection *
elf_vax_gc_mark_hook (asection *sec,
struct bfd_link_info *info ATTRIBUTE_UNUSED,
Elf_Internal_Rela *rel,
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
{
if (h != NULL)
{
switch (ELF32_R_TYPE (rel->r_info))
{
case R_VAX_GNU_VTINHERIT:
case R_VAX_GNU_VTENTRY:
break;
default:
switch (h->root.type)
{
default:
break;
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
return h->root.u.def.section;
case bfd_link_hash_common:
return h->root.u.c.p->section;
}
}
}
else
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
return NULL;
}
static bfd_boolean
elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
const Elf_Internal_Rela *relocs)
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
const Elf_Internal_Rela *rel, *relend;
bfd *dynobj;
dynobj = elf_hash_table (info)->dynobj;
if (dynobj == NULL)
return TRUE;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
{
unsigned long r_symndx;
struct elf_link_hash_entry *h = NULL;
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx >= symtab_hdr->sh_info)
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
}
switch (ELF32_R_TYPE (rel->r_info))
{
case R_VAX_GOT32:
if (h != NULL && h->got.refcount > 0)
--h->got.refcount;
break;
case R_VAX_PLT32:
case R_VAX_PC8:
case R_VAX_PC16:
case R_VAX_PC32:
case R_VAX_8:
case R_VAX_16:
case R_VAX_32:
if (h != NULL && h->plt.refcount > 0)
--h->plt.refcount;
break;
default:
break;
}
}
return TRUE;
}
regular object. The current definition is in some section of the
dynamic object, but we're not including those sections. We have to
change the definition to something the rest of the link can
understand. */
static bfd_boolean
elf_vax_adjust_dynamic_symbol (info, h)
struct bfd_link_info *info;
struct elf_link_hash_entry *h;
{
bfd *dynobj;
asection *s;
unsigned int power_of_two;
dynobj = elf_hash_table (info)->dynobj;
BFD_ASSERT (dynobj != NULL
&& (h->needs_plt
|| h->u.weakdef != NULL
|| (h->def_dynamic
&& h->ref_regular
&& !h->def_regular)));
will fill in the contents of the procedure linkage table later,
when we know the address of the .got section. */
if (h->type == STT_FUNC
|| h->needs_plt)
{
if (! info->shared
&& !h->def_dynamic
&& !h->ref_dynamic
by a PLTxxO relocation. In this case we already recorded
it as a dynamic symbol. */
&& h->dynindx == -1)
{
file, but the symbol was never referred to by a dynamic
object. In such a case, we don't actually need to build
a procedure linkage table, and we can just do a PCxx
reloc instead. */
BFD_ASSERT (h->needs_plt);
h->plt.offset = (bfd_vma) -1;
return TRUE;
}
if (h->plt.refcount <= 0)
{
h->needs_plt = 0;
h->plt.offset = (bfd_vma) -1;
return TRUE;
}
if (h->dynindx == -1)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
s = bfd_get_section_by_name (dynobj, ".plt");
BFD_ASSERT (s != NULL);
first entry. */
if (s->size == 0)
{
s->size += PLT_ENTRY_SIZE;
}
not generating a shared library, then set the symbol to this
location in the .plt. This is required to make function
pointers compare as equal between the normal executable and
the shared library. */
if (!info->shared
&& !h->def_regular)
{
h->root.u.def.section = s;
h->root.u.def.value = s->size;
}
h->plt.offset = s->size;
s->size += PLT_ENTRY_SIZE;
will be placed in the .got section by the linker script. */
s = bfd_get_section_by_name (dynobj, ".got.plt");
BFD_ASSERT (s != NULL);
s->size += 4;
s = bfd_get_section_by_name (dynobj, ".rela.plt");
BFD_ASSERT (s != NULL);
s->size += sizeof (Elf32_External_Rela);
return TRUE;
}
count any more. */
h->plt.offset = (bfd_vma) -1;
processor independent code will have arranged for us to see the
real definition first, and we can just use the same value. */
if (h->u.weakdef != NULL)
{
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
h->root.u.def.section = h->u.weakdef->root.u.def.section;
h->root.u.def.value = h->u.weakdef->root.u.def.value;
return TRUE;
}
is not a function. */
only references to the symbol are via the global offset table.
For such cases we need not do anything here; the relocations will
be handled correctly by relocate_section. */
if (info->shared)
return TRUE;
if (h->size == 0)
{
(*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
h->root.root.string);
return TRUE;
}
become part of the .bss section of the executable. There will be
an entry for this symbol in the .dynsym section. The dynamic
object will contain position independent code, so all references
from the dynamic object to this symbol will go through the global
offset table. The dynamic linker will use the .dynsym entry to
determine the address it must put in the global offset table, so
both the dynamic object and the regular object will refer to the
same memory location for the variable. */
s = bfd_get_section_by_name (dynobj, ".dynbss");
BFD_ASSERT (s != NULL);
copy the initial value out of the dynamic object and into the
runtime process image. We need to remember the offset into the
.rela.bss section we are going to use. */
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
{
asection *srel;
srel = bfd_get_section_by_name (dynobj, ".rela.bss");
BFD_ASSERT (srel != NULL);
srel->size += sizeof (Elf32_External_Rela);
h->needs_copy = 1;
}
have no idea how ELF linkers handle this. */
power_of_two = bfd_log2 (h->size);
if (power_of_two > 3)
power_of_two = 3;
s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
if (power_of_two > bfd_get_section_alignment (dynobj, s))
{
if (!bfd_set_section_alignment (dynobj, s, power_of_two))
return FALSE;
}
h->root.u.def.section = s;
h->root.u.def.value = s->size;
s->size += h->size;
return TRUE;
}
static bfd_boolean
elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
{
bfd *dynobj;
asection *s;
bfd_boolean plt;
bfd_boolean relocs;
bfd_boolean reltext;
dynobj = elf_hash_table (info)->dynobj;
BFD_ASSERT (dynobj != NULL);
if (elf_hash_table (info)->dynamic_sections_created)
{
if (info->executable)
{
s = bfd_get_section_by_name (dynobj, ".interp");
BFD_ASSERT (s != NULL);
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
}
else
{
However, if we are not creating the dynamic sections, we will
not actually use these entries. Reset the size of .rela.got
and .got, which will cause it to get stripped from the output
file below. */
s = bfd_get_section_by_name (dynobj, ".rela.got");
if (s != NULL)
s->size = 0;
s = bfd_get_section_by_name (dynobj, ".got.plt");
if (s != NULL)
s->size = 0;
s = bfd_get_section_by_name (dynobj, ".got");
if (s != NULL)
s->size = 0;
}
relative relocs against symbols defined in a regular object. We
allocated space for them in the check_relocs routine, but we will not
fill them in in the relocate_section routine. */
if (info->shared && info->symbolic)
elf_vax_link_hash_traverse (elf_vax_hash_table (info),
elf_vax_discard_copies,
NULL);
discard all the got entries we've recorded. Otherwise, we need to
instantiate (allocate space for them). */
elf_link_hash_traverse (elf_hash_table (info),
elf_vax_instantiate_got_entries,
(PTR) info);
determined the sizes of the various dynamic sections. Allocate
memory for them. */
plt = FALSE;
relocs = FALSE;
reltext = FALSE;
for (s = dynobj->sections; s != NULL; s = s->next)
{
const char *name;
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
of the dynobj section names depend upon the input files. */
name = bfd_get_section_name (dynobj, s);
if (strcmp (name, ".plt") == 0)
{
plt = s->size != 0;
}
else if (strncmp (name, ".rela", 5) == 0)
{
if (s->size != 0)
{
asection *target;
than .rela.plt. */
if (strcmp (name, ".rela.plt") != 0)
{
const char *outname;
relocs = TRUE;
section, then we probably need a DT_TEXTREL
entry. .rela.plt is actually associated with
.got.plt, which is never readonly. */
outname = bfd_get_section_name (output_bfd,
s->output_section);
target = bfd_get_section_by_name (output_bfd, outname + 5);
if (target != NULL
&& (target->flags & SEC_READONLY) != 0
&& (target->flags & SEC_ALLOC) != 0)
reltext = TRUE;
}
to copy relocs into the output file. */
s->reloc_count = 0;
}
}
else if (strncmp (name, ".got", 4) != 0
&& strcmp (name, ".dynbss") != 0)
{
continue;
}
if (s->size == 0)
{
output file. This is mostly to handle .rela.bss and
.rela.plt. We must create both sections in
create_dynamic_sections, because they must be created
before the linker maps input sections to output
sections. The linker does that before
adjust_dynamic_symbol is called, and it is that
function which decides whether anything needs to go
into these sections. */
s->flags |= SEC_EXCLUDE;
continue;
}
if ((s->flags & SEC_HAS_CONTENTS) == 0)
continue;
s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
if (s->contents == NULL)
return FALSE;
}
if (elf_hash_table (info)->dynamic_sections_created)
{
values later, in elf_vax_finish_dynamic_sections, but we
must add the entries now so that we get the correct size for
the .dynamic section. The DT_DEBUG entry is filled in by the
dynamic linker and used by the debugger. */
#define add_dynamic_entry(TAG, VAL) \
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
if (!info->shared)
{
if (!add_dynamic_entry (DT_DEBUG, 0))
return FALSE;
}
if (plt)
{
if (!add_dynamic_entry (DT_PLTGOT, 0)
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|| !add_dynamic_entry (DT_JMPREL, 0))
return FALSE;
}
if (relocs)
{
if (!add_dynamic_entry (DT_RELA, 0)
|| !add_dynamic_entry (DT_RELASZ, 0)
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
return FALSE;
}
if (reltext || (info->flags & DF_TEXTREL) != 0)
{
if (!add_dynamic_entry (DT_TEXTREL, 0))
return FALSE;
}
}
#undef add_dynamic_entry
return TRUE;
}
creating a shared object with -Bsymbolic. It discards the space
allocated to copy PC relative relocs against symbols which are defined
in regular objects. We allocated space for them in the check_relocs
routine, but we won't fill them in in the relocate_section routine. */
static bfd_boolean
elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
PTR ignore ATTRIBUTE_UNUSED)
{
struct elf_vax_pcrel_relocs_copied *s;
if (h->root.root.type == bfd_link_hash_warning)
h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
if (!h->root.def_regular)
return TRUE;
for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
s->section->size -= s->count * sizeof (Elf32_External_Rela);
return TRUE;
}
that have GOT or PLT (.GOT) references. If creating a static object or a
shared object with -Bsymbolic, it resets the reference count back to 0
and sets the offset to -1 so normal PC32 relocation will be done. If
creating a shared object or executable, space in the .got and .rela.got
will be reserved for the symbol. */
static bfd_boolean
elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
{
struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
bfd *dynobj;
asection *sgot;
asection *srelgot;
if (h->got.refcount <= 0 && h->plt.refcount <= 0)
return TRUE;
dynobj = elf_hash_table (info)->dynobj;
if (dynobj == NULL)
return TRUE;
sgot = bfd_get_section_by_name (dynobj, ".got");
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
if (!elf_hash_table (info)->dynamic_sections_created
|| (info->shared && info->symbolic))
{
h->got.refcount = 0;
h->got.offset = (bfd_vma) -1;
h->plt.refcount = 0;
h->plt.offset = (bfd_vma) -1;
}
else if (h->got.refcount > 0)
{
if (h->dynindx == -1)
{
if (!bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
sgot->size += 4;
srelgot->size += sizeof (Elf32_External_Rela);
}
return TRUE;
}
static bfd_boolean
elf_vax_relocate_section (bfd *output_bfd,
struct bfd_link_info *info,
bfd *input_bfd,
asection *input_section,
bfd_byte *contents,
Elf_Internal_Rela *relocs,
Elf_Internal_Sym *local_syms,
asection **local_sections)
{
bfd *dynobj;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_vma *local_got_offsets;
bfd_vma plt_index;
bfd_vma got_offset;
asection *sgot;
asection *splt;
asection *sgotplt;
asection *sreloc;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
if (info->relocatable)
return TRUE;
dynobj = elf_hash_table (info)->dynobj;
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
local_got_offsets = elf_local_got_offsets (input_bfd);
sgot = NULL;
splt = NULL;
sgotplt = NULL;
sreloc = NULL;
rel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
int r_type;
reloc_howto_type *howto;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
asection *sec;
bfd_vma relocation;
bfd_reloc_status_type r;
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type < 0 || r_type >= (int) R_VAX_max)
{
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
howto = howto_table + r_type;
r_symndx = ELF32_R_SYM (rel->r_info);
h = NULL;
sym = NULL;
sec = NULL;
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
}
else
{
bfd_boolean unresolved_reloc;
bfd_boolean warned;
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
r_symndx, symtab_hdr, sym_hashes,
h, sec, relocation,
unresolved_reloc, warned);
if ((h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
&& ((r_type == R_VAX_PLT32
&& h->plt.offset != (bfd_vma) -1
&& elf_hash_table (info)->dynamic_sections_created)
|| (r_type == R_VAX_GOT32
&& strcmp (h->root.root.string,
"_GLOBAL_OFFSET_TABLE_") != 0
&& elf_hash_table (info)->dynamic_sections_created
&& (! info->shared
|| (! info->symbolic && h->dynindx != -1)
|| !h->def_regular))
|| (info->shared
&& ((! info->symbolic && h->dynindx != -1)
|| !h->def_regular)
&& ((input_section->flags & SEC_ALLOC) != 0
sections against symbols defined externally
in shared libraries. We can't do anything
with them here. */
|| ((input_section->flags & SEC_DEBUGGING) != 0
&& h->def_dynamic))
&& (r_type == R_VAX_8
|| r_type == R_VAX_16
|| r_type == R_VAX_32
|| r_type == R_VAX_PC8
|| r_type == R_VAX_PC16
|| r_type == R_VAX_PC32))))
value. We check specially because in some
obscure cases sec->output_section will be NULL. */
relocation = 0;
}
switch (r_type)
{
case R_VAX_GOT32:
in the global offset table. */
if (h == NULL || h->got.offset == (bfd_vma) -1)
break;
the global offset table. */
{
bfd_vma off;
if (sgot == NULL)
{
sgot = bfd_get_section_by_name (dynobj, ".got");
BFD_ASSERT (sgot != NULL);
}
BFD_ASSERT (h != NULL);
off = h->got.offset;
BFD_ASSERT (off != (bfd_vma) -1);
BFD_ASSERT (off < sgot->size);
if (info->shared
&& h->dynindx == -1
&& h->def_regular)
{
because of a version file.. We must initialize
this entry in the global offset table. Since
the offset must always be a multiple of 4, we
use the least significant bit to record whether
we have initialized it already.
When doing a dynamic link, we create a .rela.got
relocation entry to initialize the value. This
is done in the finish_dynamic_symbol routine. */
if ((off & 1) != 0)
off &= ~1;
else
{
bfd_put_32 (output_bfd, relocation + rel->r_addend,
sgot->contents + off);
h->got.offset |= 1;
}
} else {
bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
}
relocation = sgot->output_offset + off;
rel->r_addend = 0;
contents[rel->r_offset - 1] |= 0x10;
relocation += sgot->output_section->vma;
}
break;
case R_VAX_PLT32:
procedure linkage table. */
without using the procedure linkage table. */
if (h == NULL)
break;
if (h->plt.offset == (bfd_vma) -1
|| !elf_hash_table (info)->dynamic_sections_created)
{
happens when statically linking PIC code, or when
using -Bsymbolic. */
break;
}
if (splt == NULL)
{
splt = bfd_get_section_by_name (dynobj, ".plt");
BFD_ASSERT (splt != NULL);
}
if (sgotplt == NULL)
{
sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
BFD_ASSERT (splt != NULL);
}
plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
corresponds to this function. Each .got entry is 4 bytes.
The first two are reserved. */
got_offset = (plt_index + 3) * 4;
of the plt itself. */
relocation = (sgotplt->output_section->vma
+ sgotplt->output_offset
+ got_offset);
contents[rel->r_offset-1] |= 0x10;
if (rel->r_addend == 2)
{
h->plt.offset |= 1;
}
else if (rel->r_addend != 0)
(*_bfd_error_handler)
(_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
bfd_get_filename (input_bfd), rel->r_addend,
h->root.root.string,
bfd_get_section_name (input_bfd, input_section));
rel->r_addend = 0;
break;
case R_VAX_PC8:
case R_VAX_PC16:
case R_VAX_PC32:
if (h == NULL)
break;
case R_VAX_8:
case R_VAX_16:
case R_VAX_32:
if (info->shared
&& r_symndx != 0
&& (input_section->flags & SEC_ALLOC) != 0
&& ((r_type != R_VAX_PC8
&& r_type != R_VAX_PC16
&& r_type != R_VAX_PC32)
|| (!info->symbolic
|| !h->def_regular)))
{
Elf_Internal_Rela outrel;
bfd_byte *loc;
bfd_boolean skip, relocate;
are copied into the output file to be resolved at run
time. */
if (sreloc == NULL)
{
const char *name;
name = (bfd_elf_string_from_elf_section
(input_bfd,
elf_elfheader (input_bfd)->e_shstrndx,
elf_section_data (input_section)->rel_hdr.sh_name));
if (name == NULL)
return FALSE;
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
&& strcmp (bfd_get_section_name (input_bfd,
input_section),
name + 5) == 0);
sreloc = bfd_get_section_by_name (dynobj, name);
BFD_ASSERT (sreloc != NULL);
}
skip = FALSE;
relocate = FALSE;
outrel.r_offset =
_bfd_elf_section_offset (output_bfd, info, input_section,
rel->r_offset);
if (outrel.r_offset == (bfd_vma) -1)
skip = TRUE;
if (outrel.r_offset == (bfd_vma) -2)
skip = TRUE, relocate = TRUE;
outrel.r_offset += (input_section->output_section->vma
+ input_section->output_offset);
if (skip)
memset (&outrel, 0, sizeof outrel);
become local. */
else if (h != NULL
&& ((! info->symbolic && h->dynindx != -1)
|| !h->def_regular))
{
BFD_ASSERT (h->dynindx != -1);
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
outrel.r_addend = relocation + rel->r_addend;
}
else
{
if (r_type == R_VAX_32)
{
relocate = TRUE;
outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
BFD_ASSERT (bfd_get_signed_32 (input_bfd,
&contents[rel->r_offset]) == 0);
outrel.r_addend = relocation + rel->r_addend;
}
else
{
long indx;
if (bfd_is_abs_section (sec))
indx = 0;
else if (sec == NULL || sec->owner == NULL)
{
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
else
{
asection *osec;
osec = sec->output_section;
indx = elf_section_data (osec)->dynindx;
BFD_ASSERT (indx > 0);
}
outrel.r_info = ELF32_R_INFO (indx, r_type);
outrel.r_addend = relocation + rel->r_addend;
}
}
if (!strcmp (bfd_get_section_name (input_bfd, input_section),
".text") != 0 ||
(info->shared
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_32
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
{
if (h != NULL)
(*_bfd_error_handler)
(_("%s: warning: %s relocation against symbol `%s' from %s section"),
bfd_get_filename (input_bfd), howto->name,
h->root.root.string,
bfd_get_section_name (input_bfd, input_section));
else
(*_bfd_error_handler)
(_("%s: warning: %s relocation to 0x%x from %s section"),
bfd_get_filename (input_bfd), howto->name,
outrel.r_addend,
bfd_get_section_name (input_bfd, input_section));
}
loc = sreloc->contents;
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
need to do anything now, except for R_VAX_32
relocations that have been turned into
R_VAX_RELATIVE. */
if (!relocate)
continue;
}
break;
case R_VAX_GNU_VTINHERIT:
case R_VAX_GNU_VTENTRY:
continue;
default:
break;
}
So subtract the difference from the relocation amount since we can't
add it to the offset. */
if (howto->pc_relative && howto->pcrel_offset)
relocation -= bfd_get_reloc_size(howto);
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
relocation, rel->r_addend);
if (r != bfd_reloc_ok)
{
switch (r)
{
default:
case bfd_reloc_outofrange:
abort ();
case bfd_reloc_overflow:
{
const char *name;
if (h != NULL)
name = NULL;
else
{
name = bfd_elf_string_from_elf_section (input_bfd,
symtab_hdr->sh_link,
sym->st_name);
if (name == NULL)
return FALSE;
if (*name == '\0')
name = bfd_section_name (input_bfd, sec);
}
if (!(info->callbacks->reloc_overflow
(info, (h ? &h->root : NULL), name, howto->name,
(bfd_vma) 0, input_bfd, input_section,
rel->r_offset)))
return FALSE;
}
break;
}
}
}
return TRUE;
}
dynamic sections here. */
static bfd_boolean
elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
{
bfd *dynobj;
dynobj = elf_hash_table (info)->dynobj;
if (h->plt.offset != (bfd_vma) -1)
{
asection *splt;
asection *sgot;
asection *srela;
bfd_vma plt_index;
bfd_vma got_offset;
bfd_vma addend;
Elf_Internal_Rela rela;
bfd_byte *loc;
it up. */
BFD_ASSERT (h->dynindx != -1);
splt = bfd_get_section_by_name (dynobj, ".plt");
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
srela = bfd_get_section_by_name (dynobj, ".rela.plt");
BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
addend = 2 * (h->plt.offset & 1);
h->plt.offset &= ~1;
corresponds to this symbol. This is the index of this symbol
in all the symbols for which we are making plt entries. The
first entry in the procedure linkage table is reserved. */
plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
corresponds to this function. Each .got entry is 4 bytes.
The first two are reserved. */
got_offset = (plt_index + 3) * 4;
memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
PLT_ENTRY_SIZE);
bfd_put_32 (output_bfd,
-(h->plt.offset + 8),
splt->contents + h->plt.offset + 4);
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
splt->contents + h->plt.offset + 8);
bfd_put_32 (output_bfd,
(splt->output_section->vma
+ splt->output_offset
+ h->plt.offset) + addend,
sgot->contents + got_offset);
rela.r_offset = (sgot->output_section->vma
+ sgot->output_offset
+ got_offset);
rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
rela.r_addend = addend;
loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
if (!h->def_regular)
{
the .plt section. Leave the value alone. */
sym->st_shndx = SHN_UNDEF;
}
}
if (h->got.offset != (bfd_vma) -1)
{
asection *sgot;
asection *srela;
Elf_Internal_Rela rela;
bfd_byte *loc;
up. */
sgot = bfd_get_section_by_name (dynobj, ".got");
srela = bfd_get_section_by_name (dynobj, ".rela.got");
BFD_ASSERT (sgot != NULL && srela != NULL);
rela.r_offset = (sgot->output_section->vma
+ sgot->output_offset
+ (h->got.offset &~ 1));
locally we just want to emit a RELATIVE reloc. The entry in
the global offset table will already have been initialized in
the relocate_section function. */
if (info->shared
&& h->dynindx == -1
&& h->def_regular)
{
rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
}
else
{
rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
}
rela.r_addend = bfd_get_signed_32 (output_bfd,
(sgot->contents
+ (h->got.offset & ~1)));
loc = srela->contents;
loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
}
if (h->needs_copy)
{
asection *s;
Elf_Internal_Rela rela;
bfd_byte *loc;
BFD_ASSERT (h->dynindx != -1
&& (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,
".rela.bss");
BFD_ASSERT (s != NULL);
rela.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
rela.r_addend = 0;
loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
}
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|| h == elf_hash_table (info)->hgot)
sym->st_shndx = SHN_ABS;
return TRUE;
}
static bfd_boolean
elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
{
bfd *dynobj;
asection *sgot;
asection *sdyn;
dynobj = elf_hash_table (info)->dynobj;
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
BFD_ASSERT (sgot != NULL);
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
if (elf_hash_table (info)->dynamic_sections_created)
{
asection *splt;
Elf32_External_Dyn *dyncon, *dynconend;
splt = bfd_get_section_by_name (dynobj, ".plt");
BFD_ASSERT (splt != NULL && sdyn != NULL);
dyncon = (Elf32_External_Dyn *) sdyn->contents;
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
const char *name;
asection *s;
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
default:
break;
case DT_PLTGOT:
name = ".got";
goto get_vma;
case DT_JMPREL:
name = ".rela.plt";
get_vma:
s = bfd_get_section_by_name (output_bfd, name);
BFD_ASSERT (s != NULL);
dyn.d_un.d_ptr = s->vma;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
case DT_PLTRELSZ:
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
BFD_ASSERT (s != NULL);
dyn.d_un.d_val = s->size;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
case DT_RELASZ:
not be included in the overall relocs (DT_RELA).
Therefore, we override the DT_RELASZ entry here to
make it not include the JMPREL relocs. Since the
linker script arranges for .rela.plt to follow all
other relocation sections, we don't have to worry
about changing the DT_RELA entry. */
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
if (s != NULL)
dyn.d_un.d_val -= s->size;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
}
}
if (splt->size > 0)
{
memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
bfd_put_32 (output_bfd,
(sgot->output_section->vma
+ sgot->output_offset + 4
- (splt->output_section->vma + 6)),
splt->contents + 2);
bfd_put_32 (output_bfd,
(sgot->output_section->vma
+ sgot->output_offset + 8
- (splt->output_section->vma + 12)),
splt->contents + 8);
elf_section_data (splt->output_section)->this_hdr.sh_entsize
= PLT_ENTRY_SIZE;
}
}
if (sgot->size > 0)
{
if (sdyn == NULL)
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
else
bfd_put_32 (output_bfd,
sdyn->output_section->vma + sdyn->output_offset,
sgot->contents);
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
}
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
return TRUE;
}
#define TARGET_LITTLE_SYM bfd_elf32_vax_vec
#define TARGET_LITTLE_NAME "elf32-vax"
#define ELF_MACHINE_CODE EM_VAX
#define ELF_MAXPAGESIZE 0x1000
#define elf_backend_create_dynamic_sections \
_bfd_elf_create_dynamic_sections
#define bfd_elf32_bfd_link_hash_table_create \
elf_vax_link_hash_table_create
#define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
#define elf_backend_check_relocs elf_vax_check_relocs
#define elf_backend_adjust_dynamic_symbol \
elf_vax_adjust_dynamic_symbol
#define elf_backend_size_dynamic_sections \
elf_vax_size_dynamic_sections
#define elf_backend_relocate_section elf_vax_relocate_section
#define elf_backend_finish_dynamic_symbol \
elf_vax_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections \
elf_vax_finish_dynamic_sections
#define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
#define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
#define bfd_elf32_bfd_merge_private_bfd_data \
elf32_vax_merge_private_bfd_data
#define bfd_elf32_bfd_set_private_flags \
elf32_vax_set_private_flags
#define bfd_elf32_bfd_print_private_bfd_data \
elf32_vax_print_private_bfd_data
#define elf_backend_can_gc_sections 1
#define elf_backend_want_got_plt 1
#define elf_backend_plt_readonly 1
#define elf_backend_want_plt_sym 0
#define elf_backend_got_header_size 16
#define elf_backend_rela_normal 1
#include "elf32-target.h"
