binutils-gdb/bfd/elf32-d10v.c

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/* D10V-specific support for 32-bit ELF
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Copyright 1996, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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Contributed by Martin Hunt (hunt@cygnus.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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/d10v.h"
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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
static void d10v_info_to_howto_rel
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
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static asection * elf32_d10v_gc_mark_hook
PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
struct elf_link_hash_entry *, Elf_Internal_Sym *));
static boolean elf32_d10v_gc_sweep_hook
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
static boolean elf32_d10v_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
static boolean elf32_d10v_relocate_section
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *,
asection **));
/* Use REL instead of RELA to save space. */
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#define USE_REL
static reloc_howto_type elf_d10v_howto_table[] =
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{
/* This reloc does nothing. */
HOWTO (R_D10V_NONE, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_D10V_NONE", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* An PC Relative 10-bit relocation, shifted by 2 */
/* right container */
HOWTO (R_D10V_10_PCREL_R, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
10, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_D10V_10_PCREL_R", /* name */
false, /* partial_inplace */
0xff, /* src_mask */
0xff, /* dst_mask */
true), /* pcrel_offset */
/* An PC Relative 10-bit relocation, shifted by 2 */
/* left container */
HOWTO (R_D10V_10_PCREL_L, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
10, /* bitsize */
true, /* pc_relative */
15, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_D10V_10_PCREL_L", /* name */
false, /* partial_inplace */
0x07f8000, /* src_mask */
0x07f8000, /* dst_mask */
true), /* pcrel_offset */
/* A 16 bit absolute relocation */
HOWTO (R_D10V_16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_D10V_16", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* An 18 bit absolute relocation, right shifted 2 */
HOWTO (R_D10V_18, /* type */
2, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
18, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_D10V_18", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* A relative 18 bit relocation, right shifted by 2 */
HOWTO (R_D10V_18_PCREL, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
18, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_D10V_18_PCREL", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
true), /* pcrel_offset */
/* A 32 bit absolute relocation */
HOWTO (R_D10V_32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_D10V_32", /* name */
false, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* GNU extension to record C++ vtable hierarchy */
HOWTO (R_D10V_GNU_VTINHERIT, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"R_D10V_GNU_VTINHERIT", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* GNU extension to record C++ vtable member usage */
HOWTO (R_D10V_GNU_VTENTRY, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
"R_D10V_GNU_VTENTRY", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
};
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/* Map BFD reloc types to D10V ELF reloc types. */
struct d10v_reloc_map
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{
bfd_reloc_code_real_type bfd_reloc_val;
unsigned char elf_reloc_val;
};
static const struct d10v_reloc_map d10v_reloc_map[] =
{
{ BFD_RELOC_NONE, R_D10V_NONE, },
{ BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R },
{ BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L },
{ BFD_RELOC_16, R_D10V_16 },
{ BFD_RELOC_D10V_18, R_D10V_18 },
{ BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL },
{ BFD_RELOC_32, R_D10V_32 },
{ BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT },
{ BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY },
};
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static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
bfd *abfd ATTRIBUTE_UNUSED;
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bfd_reloc_code_real_type code;
{
unsigned int i;
for (i = 0;
i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map);
i++)
{
if (d10v_reloc_map[i].bfd_reloc_val == code)
return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val];
}
return NULL;
}
/* Set the howto pointer for an D10V ELF reloc. */
static void
d10v_info_to_howto_rel (abfd, cache_ptr, dst)
bfd *abfd ATTRIBUTE_UNUSED;
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arelent *cache_ptr;
Elf32_Internal_Rel *dst;
{
unsigned int r_type;
r_type = ELF32_R_TYPE (dst->r_info);
BFD_ASSERT (r_type < (unsigned int) R_D10V_max);
cache_ptr->howto = &elf_d10v_howto_table[r_type];
}
static asection *
elf32_d10v_gc_mark_hook (abfd, info, rel, h, sym)
bfd *abfd;
struct bfd_link_info *info ATTRIBUTE_UNUSED;
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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_D10V_GNU_VTINHERIT:
case R_D10V_GNU_VTENTRY:
break;
default:
switch (h->root.type)
{
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;
default:
break;
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}
}
}
else
{
if (!(elf_bad_symtab (abfd)
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
&& ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
&& sym->st_shndx != SHN_COMMON))
{
return bfd_section_from_elf_index (abfd, sym->st_shndx);
}
}
return NULL;
}
static boolean
elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs)
bfd *abfd ATTRIBUTE_UNUSED;
struct bfd_link_info *info ATTRIBUTE_UNUSED;
asection *sec ATTRIBUTE_UNUSED;
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
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{
/* we don't use got and plt entries for d10v */
return true;
}
/* Look through the relocs for a section during the first phase.
Since we don't do .gots or .plts, we just need to consider the
virtual table relocs for gc. */
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static boolean
elf32_d10v_check_relocs (abfd, info, sec, relocs)
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, **sym_hashes_end;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
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if (info->relocateable)
return true;
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symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
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if (!elf_bad_symtab (abfd))
sym_hashes_end -= symtab_hdr->sh_info;
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rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
struct elf_link_hash_entry *h;
unsigned long r_symndx;
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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];
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switch (ELF32_R_TYPE (rel->r_info))
{
/* This relocation describes the C++ object vtable hierarchy.
Reconstruct it for later use during GC. */
case R_D10V_GNU_VTINHERIT:
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
return false;
break;
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/* This relocation describes which C++ vtable entries are actually
used. Record for later use during GC. */
case R_D10V_GNU_VTENTRY:
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
return false;
break;
}
}
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return true;
}
/* Relocate a D10V ELF section. */
static boolean
elf32_d10v_relocate_section (output_bfd, info, input_bfd, input_section,
contents, relocs, local_syms, local_sections)
bfd *output_bfd ATTRIBUTE_UNUSED;
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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;
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
Elf_Internal_Rela *rel, *relend;
const char *name;
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
rel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
int r_type;
reloc_howto_type *howto;
unsigned long r_symndx;
Elf_Internal_Sym *sym;
asection *sec;
struct elf_link_hash_entry *h;
bfd_vma relocation;
bfd_reloc_status_type r;
r_symndx = ELF32_R_SYM (rel->r_info);
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type == R_D10V_GNU_VTENTRY
|| r_type == R_D10V_GNU_VTINHERIT )
continue;
howto = elf_d10v_howto_table + r_type;
if (info->relocateable)
{
/* This is a relocateable link. We don't have to change
anything, unless the reloc is against a section symbol,
in which case we have to adjust according to where the
section symbol winds up in the output section. */
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
{
sec = local_sections[r_symndx];
rel->r_addend += sec->output_offset + sym->st_value;
}
}
continue;
}
/* This is a final link. */
h = NULL;
sym = NULL;
sec = NULL;
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
relocation = (sec->output_section->vma
+ sec->output_offset
+ sym->st_value);
}
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;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
else
{
if (!((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
2000-03-01 H.J. Lu <hjl@gnu.org> * aoutx.h (aout_link_input_section_std): Pass "true" to the undefined_symbol callback. (aout_link_input_section_ext): Likewise. * bout.c (get_value): Likewise. * coff-a29k.c (coff_a29k_relocate_section): Likewise. * coff-alpha.c (alpha_ecoff_get_relocated_section_conten): Likewise. (alpha_relocate_section): Likewise. * coff-arm.c (coff_arm_relocate_section): Likewise. * coff-i960.c (coff_i960_relocate_section): Likewise. * coff-mcore.c (coff_mcore_relocate_section): Likewise. * coff-mips.c (mips_relocate_section): Likewise. * coff-ppc.c (coff_ppc_relocate_section): Likewise. * coff-sh.c (sh_relocate_section): Likewise. * coff-tic80.c (coff_tic80_relocate_section): Likewise. * cofflink.c (_bfd_coff_generic_relocate_section): Likewise. * elf-m10200.c (mn10200_elf_relocate_section): Likewise. * elf-m10300.c (mn10300_elf_relocate_section): Likewise. * elf32-d10v.c (elf32_d10v_relocate_section): Likewise. * elf32-fr30.c (fr30_elf_relocate_section): Likewise. * elf32-hppa.c (elf32_hppa_relocate_section): Likewise. * elf32-i370.c (i370_elf_relocate_section): Likewise. * elf32-m32r.c (m32r_elf_relocate_section): Likewise. * elf32-mcore.c (mcore_elf_relocate_section): Likewise. * elf32-sh.c (sh_elf_relocate_section): Likewise. * elf32-v850.c (v850_elf_relocate_section): Likewise. * elflink.c (_bfd_elf_link_record_dynamic_symbol): Likewise. * elflink.h (elf_link_output_extsym): Likewise. * pe-mips.c (coff_pe_mips_relocate_section): Likewise. * reloc.c (bfd_generic_get_relocated_section_conten): Likewise. * reloc16.c (_bfd_ppc_xcoff_relocate_section): Likewise. * elf-hppa.h (elf_hppa_relocate_section): Pass "false" to the undefined_symbol callback when building shared library with -Bsymbolic and undefined symbols are allowed. Otherwise, pass "true". * elf32-arm.h (elf32_arm_relocate_section): Likewise. * elf32-i386.c (elf_i386_relocate_section): Likewise. * elf32-m68k.c (elf_m68k_relocate_section): Likewise. * elf32-mips.c (mips_elf_calculate_relocation): Likewise. (elf32_mips_get_relocated_section_content): Likewise. * elf32-ppc.c (ppc_elf_relocate_section): Likewise. * elf32-sparc.c (elf32_sparc_relocate_section): Likewise. * elf64-alpha.c (elf64_alpha_relocate_section): Likewise. * elf64-sparc.c (sparc64_elf_relocate_section): Likewise.
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input_section, rel->r_offset, true)))
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return false;
relocation = 0;
}
}
if (h != NULL)
name = h->root.root.string;
else
{
name = (bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link, sym->st_name));
if (name == NULL || *name == '\0')
name = bfd_section_name (input_bfd, sec);
}
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r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
relocation, rel->r_addend);
if (r != bfd_reloc_ok)
{
const char * msg = (const char *) 0;
switch (r)
{
case bfd_reloc_overflow:
if (!((*info->callbacks->reloc_overflow)
(info, name, howto->name, (bfd_vma) 0,
input_bfd, input_section, rel->r_offset)))
return false;
break;
case bfd_reloc_undefined:
if (!((*info->callbacks->undefined_symbol)
(info, name, input_bfd, input_section,
2000-03-01 H.J. Lu <hjl@gnu.org> * aoutx.h (aout_link_input_section_std): Pass "true" to the undefined_symbol callback. (aout_link_input_section_ext): Likewise. * bout.c (get_value): Likewise. * coff-a29k.c (coff_a29k_relocate_section): Likewise. * coff-alpha.c (alpha_ecoff_get_relocated_section_conten): Likewise. (alpha_relocate_section): Likewise. * coff-arm.c (coff_arm_relocate_section): Likewise. * coff-i960.c (coff_i960_relocate_section): Likewise. * coff-mcore.c (coff_mcore_relocate_section): Likewise. * coff-mips.c (mips_relocate_section): Likewise. * coff-ppc.c (coff_ppc_relocate_section): Likewise. * coff-sh.c (sh_relocate_section): Likewise. * coff-tic80.c (coff_tic80_relocate_section): Likewise. * cofflink.c (_bfd_coff_generic_relocate_section): Likewise. * elf-m10200.c (mn10200_elf_relocate_section): Likewise. * elf-m10300.c (mn10300_elf_relocate_section): Likewise. * elf32-d10v.c (elf32_d10v_relocate_section): Likewise. * elf32-fr30.c (fr30_elf_relocate_section): Likewise. * elf32-hppa.c (elf32_hppa_relocate_section): Likewise. * elf32-i370.c (i370_elf_relocate_section): Likewise. * elf32-m32r.c (m32r_elf_relocate_section): Likewise. * elf32-mcore.c (mcore_elf_relocate_section): Likewise. * elf32-sh.c (sh_elf_relocate_section): Likewise. * elf32-v850.c (v850_elf_relocate_section): Likewise. * elflink.c (_bfd_elf_link_record_dynamic_symbol): Likewise. * elflink.h (elf_link_output_extsym): Likewise. * pe-mips.c (coff_pe_mips_relocate_section): Likewise. * reloc.c (bfd_generic_get_relocated_section_conten): Likewise. * reloc16.c (_bfd_ppc_xcoff_relocate_section): Likewise. * elf-hppa.h (elf_hppa_relocate_section): Pass "false" to the undefined_symbol callback when building shared library with -Bsymbolic and undefined symbols are allowed. Otherwise, pass "true". * elf32-arm.h (elf32_arm_relocate_section): Likewise. * elf32-i386.c (elf_i386_relocate_section): Likewise. * elf32-m68k.c (elf_m68k_relocate_section): Likewise. * elf32-mips.c (mips_elf_calculate_relocation): Likewise. (elf32_mips_get_relocated_section_content): Likewise. * elf32-ppc.c (ppc_elf_relocate_section): Likewise. * elf32-sparc.c (elf32_sparc_relocate_section): Likewise. * elf64-alpha.c (elf64_alpha_relocate_section): Likewise. * elf64-sparc.c (sparc64_elf_relocate_section): Likewise.
2000-03-01 20:40:54 +01:00
rel->r_offset, true)))
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return false;
break;
case bfd_reloc_outofrange:
msg = _ ("internal error: out of range error");
goto common_error;
case bfd_reloc_notsupported:
msg = _ ("internal error: unsupported relocation error");
goto common_error;
case bfd_reloc_dangerous:
msg = _ ("internal error: dangerous error");
goto common_error;
default:
msg = _ ("internal error: unknown error");
/* fall through */
common_error:
if (!((*info->callbacks->warning)
(info, msg, name, input_bfd, input_section,
rel->r_offset)))
return false;
break;
}
}
}
return true;
}
#define ELF_ARCH bfd_arch_d10v
#define ELF_MACHINE_CODE EM_D10V
#define ELF_MACHINE_ALT1 EM_CYGNUS_D10V
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#define ELF_MAXPAGESIZE 0x1000
#define TARGET_BIG_SYM bfd_elf32_d10v_vec
#define TARGET_BIG_NAME "elf32-d10v"
#define elf_info_to_howto 0
#define elf_info_to_howto_rel d10v_info_to_howto_rel
#define elf_backend_object_p 0
#define elf_backend_final_write_processing 0
#define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook
#define elf_backend_gc_sweep_hook elf32_d10v_gc_sweep_hook
#define elf_backend_check_relocs elf32_d10v_check_relocs
#define elf_backend_relocate_section elf32_d10v_relocate_section
#define elf_backend_can_gc_sections 1
#include "elf32-target.h"