546 lines
16 KiB
C
546 lines
16 KiB
C
/* D10V-specific support for 32-bit ELF
|
|
Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
|
|
2007 Free Software Foundation, Inc.
|
|
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., 51 Franklin Street - Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
#include "bfd.h"
|
|
#include "sysdep.h"
|
|
#include "libbfd.h"
|
|
#include "elf-bfd.h"
|
|
#include "elf/d10v.h"
|
|
|
|
/* Use REL instead of RELA to save space. */
|
|
#define USE_REL 1
|
|
|
|
static reloc_howto_type elf_d10v_howto_table[] =
|
|
{
|
|
/* 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_dont,/* 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). */
|
|
8, /* Bitsize. */
|
|
TRUE, /* PC_relative. */
|
|
0, /* Bitpos. */
|
|
complain_overflow_signed, /* 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). */
|
|
8, /* Bitsize. */
|
|
TRUE, /* PC_relative. */
|
|
15, /* Bitpos. */
|
|
complain_overflow_signed, /* 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). */
|
|
16, /* 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). */
|
|
16, /* 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_dont,/* 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. */
|
|
};
|
|
|
|
/* Map BFD reloc types to D10V ELF reloc types. */
|
|
|
|
struct d10v_reloc_map
|
|
{
|
|
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 },
|
|
};
|
|
|
|
static reloc_howto_type *
|
|
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
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 (bfd *abfd ATTRIBUTE_UNUSED,
|
|
arelent *cache_ptr,
|
|
Elf_Internal_Rela *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 (asection *sec,
|
|
struct bfd_link_info *info,
|
|
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:
|
|
return NULL;
|
|
}
|
|
|
|
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
|
}
|
|
|
|
/* 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. */
|
|
|
|
static bfd_boolean
|
|
elf32_d10v_check_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;
|
|
|
|
if (info->relocatable)
|
|
return TRUE;
|
|
|
|
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);
|
|
if (!elf_bad_symtab (abfd))
|
|
sym_hashes_end -= symtab_hdr->sh_info;
|
|
|
|
rel_end = relocs + sec->reloc_count;
|
|
for (rel = relocs; rel < rel_end; rel++)
|
|
{
|
|
struct elf_link_hash_entry *h;
|
|
unsigned long r_symndx;
|
|
|
|
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))
|
|
{
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
|
Reconstruct it for later use during GC. */
|
|
case R_D10V_GNU_VTINHERIT:
|
|
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
|
return FALSE;
|
|
break;
|
|
|
|
/* This relocation describes which C++ vtable entries are actually
|
|
used. Record for later use during GC. */
|
|
case R_D10V_GNU_VTENTRY:
|
|
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
|
|
return FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static bfd_vma
|
|
extract_rel_addend (bfd *abfd,
|
|
bfd_byte *where,
|
|
reloc_howto_type *howto)
|
|
{
|
|
bfd_vma insn, val;
|
|
|
|
switch (howto->size)
|
|
{
|
|
case 0:
|
|
insn = bfd_get_8 (abfd, where);
|
|
break;
|
|
case 1:
|
|
insn = bfd_get_16 (abfd, where);
|
|
break;
|
|
case 2:
|
|
insn = bfd_get_32 (abfd, where);
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
|
|
val = (insn & howto->dst_mask) >> howto->bitpos << howto->rightshift;
|
|
/* We should really be testing for signed addends here, but we don't
|
|
have that info directly in the howto. */
|
|
if (howto->pc_relative)
|
|
{
|
|
bfd_vma sign;
|
|
sign = howto->dst_mask & (~howto->dst_mask >> 1 | ~(-(bfd_vma) 1 >> 1));
|
|
sign = sign >> howto->bitpos << howto->rightshift;
|
|
val = (val ^ sign) - sign;
|
|
}
|
|
return val;
|
|
}
|
|
|
|
static void
|
|
insert_rel_addend (bfd *abfd,
|
|
bfd_byte *where,
|
|
reloc_howto_type *howto,
|
|
bfd_vma addend)
|
|
{
|
|
bfd_vma insn;
|
|
|
|
addend = (addend >> howto->rightshift << howto->bitpos) & howto->dst_mask;
|
|
insn = ~howto->dst_mask;
|
|
switch (howto->size)
|
|
{
|
|
case 0:
|
|
insn &= bfd_get_8 (abfd, where);
|
|
insn |= addend;
|
|
bfd_put_8 (abfd, insn, where);
|
|
break;
|
|
case 1:
|
|
insn &= bfd_get_16 (abfd, where);
|
|
insn |= addend;
|
|
bfd_put_16 (abfd, insn, where);
|
|
break;
|
|
case 2:
|
|
insn &= bfd_get_32 (abfd, where);
|
|
insn |= addend;
|
|
bfd_put_32 (abfd, insn, where);
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
/* Relocate a D10V ELF section. */
|
|
|
|
static bfd_boolean
|
|
elf32_d10v_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)
|
|
{
|
|
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;
|
|
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);
|
|
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
|
|
&& ((sec->flags & SEC_MERGE) != 0
|
|
|| (info->relocatable
|
|
&& sec->output_offset != 0)))
|
|
{
|
|
bfd_vma addend;
|
|
bfd_byte *where = contents + rel->r_offset;
|
|
|
|
addend = extract_rel_addend (input_bfd, where, howto);
|
|
|
|
if (info->relocatable)
|
|
addend += sec->output_offset;
|
|
else
|
|
{
|
|
asection *msec = sec;
|
|
addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
|
|
addend);
|
|
addend -= relocation;
|
|
addend += msec->output_section->vma + msec->output_offset;
|
|
}
|
|
insert_rel_addend (input_bfd, where, howto, addend);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
bfd_boolean unresolved_reloc, warned;
|
|
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
|
r_symndx, symtab_hdr, sym_hashes,
|
|
h, sec, relocation,
|
|
unresolved_reloc, warned);
|
|
}
|
|
|
|
if (sec != NULL && elf_discarded_section (sec))
|
|
{
|
|
/* For relocs against symbols from removed linkonce sections,
|
|
or sections discarded by a linker script, we just want the
|
|
section contents zeroed. Avoid any special processing. */
|
|
_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
|
|
rel->r_info = 0;
|
|
rel->r_addend = 0;
|
|
continue;
|
|
}
|
|
|
|
if (info->relocatable)
|
|
continue;
|
|
|
|
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);
|
|
}
|
|
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset,
|
|
relocation, (bfd_vma) 0);
|
|
|
|
if (r != bfd_reloc_ok)
|
|
{
|
|
const char * msg = (const char *) 0;
|
|
|
|
switch (r)
|
|
{
|
|
case bfd_reloc_overflow:
|
|
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;
|
|
|
|
case bfd_reloc_undefined:
|
|
if (!((*info->callbacks->undefined_symbol)
|
|
(info, name, input_bfd, input_section,
|
|
rel->r_offset, TRUE)))
|
|
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
|
|
#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_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"
|