498 lines
15 KiB
C
498 lines
15 KiB
C
/* OR32-specific support for 32-bit ELF
|
|
Copyright 2002, 2004, 2005 Free Software Foundation, Inc.
|
|
Contributed by Ivan Guzvinec <ivang@opencores.org>
|
|
|
|
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/or32.h"
|
|
#include "libiberty.h"
|
|
|
|
/* Try to minimize the amount of space occupied by relocation tables
|
|
on the ROM (not that the ROM won't be swamped by other ELF overhead). */
|
|
#define USE_REL 1
|
|
|
|
/* Set the right machine number for an OR32 ELF file. */
|
|
|
|
static bfd_boolean
|
|
or32_elf_object_p (bfd *abfd)
|
|
{
|
|
(void) bfd_default_set_arch_mach (abfd, bfd_arch_or32, 0);
|
|
return TRUE;
|
|
}
|
|
|
|
/* The final processing done just before writing out an OR32 ELF object file.
|
|
This gets the OR32 architecture right based on the machine number. */
|
|
|
|
static void
|
|
or32_elf_final_write_processing (bfd *abfd,
|
|
bfd_boolean linker ATTRIBUTE_UNUSED)
|
|
{
|
|
elf_elfheader (abfd)->e_flags &=~ EF_OR32_MACH;
|
|
}
|
|
|
|
static bfd_reloc_status_type
|
|
or32_elf_32_reloc (bfd *abfd,
|
|
arelent *reloc_entry,
|
|
asymbol *symbol,
|
|
void * data,
|
|
asection *input_section,
|
|
bfd *output_bfd,
|
|
char **error_message ATTRIBUTE_UNUSED)
|
|
{
|
|
if (output_bfd != NULL)
|
|
{
|
|
unsigned long insn;
|
|
bfd_size_type addr = reloc_entry->address;
|
|
|
|
reloc_entry->address += input_section->output_offset;
|
|
|
|
insn = bfd_get_32 (abfd, (bfd_byte *) data + addr);
|
|
insn += symbol->section->output_section->vma;
|
|
insn += symbol->section->output_offset;
|
|
insn += symbol->value;
|
|
bfd_put_32 (abfd, insn, (bfd_byte *) data + addr);
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
static bfd_reloc_status_type
|
|
or32_elf_16_reloc (bfd *abfd,
|
|
arelent *reloc_entry,
|
|
asymbol *symbol,
|
|
void * data,
|
|
asection *input_section,
|
|
bfd *output_bfd,
|
|
char **error_message ATTRIBUTE_UNUSED)
|
|
{
|
|
if (output_bfd != NULL)
|
|
{
|
|
unsigned short insn;
|
|
bfd_size_type addr = reloc_entry->address;
|
|
|
|
reloc_entry->address += input_section->output_offset;
|
|
|
|
insn = bfd_get_16 (abfd, (bfd_byte *) data + addr);
|
|
insn += symbol->section->output_section->vma;
|
|
insn += symbol->section->output_offset;
|
|
insn += symbol->value;
|
|
bfd_put_16 (abfd, insn, (bfd_byte *) data + addr);
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
static bfd_reloc_status_type
|
|
or32_elf_8_reloc (bfd *abfd ATTRIBUTE_UNUSED,
|
|
arelent *reloc_entry,
|
|
asymbol *symbol,
|
|
void * data,
|
|
asection *input_section,
|
|
bfd *output_bfd,
|
|
char **error_message ATTRIBUTE_UNUSED)
|
|
{
|
|
if (output_bfd != NULL)
|
|
{
|
|
unsigned char insn;
|
|
bfd_size_type addr = reloc_entry->address;
|
|
|
|
reloc_entry->address += input_section->output_offset;
|
|
|
|
insn = bfd_get_8 (abfd, (bfd_byte *) data + addr);
|
|
insn += symbol->section->output_section->vma;
|
|
insn += symbol->section->output_offset;
|
|
insn += symbol->value;
|
|
bfd_put_8 (abfd, insn, (bfd_byte *) data + addr);
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
/* Do a R_OR32_CONSTH relocation. This has to be done in combination
|
|
with a R_OR32_CONST reloc, because there is a carry from the LO16 to
|
|
the HI16. Here we just save the information we need; we do the
|
|
actual relocation when we see the LO16. OR32 ELF requires that the
|
|
LO16 immediately follow the HI16. As a GNU extension, we permit an
|
|
arbitrary number of HI16 relocs to be associated with a single LO16
|
|
reloc. This extension permits gcc to output the HI and LO relocs
|
|
itself. This code is copied from the elf32-mips.c. */
|
|
|
|
struct or32_consth
|
|
{
|
|
struct or32_consth *next;
|
|
bfd_byte *addr;
|
|
bfd_vma addend;
|
|
};
|
|
|
|
/* FIXME: This should not be a static variable. */
|
|
|
|
static struct or32_consth *or32_consth_list;
|
|
|
|
static bfd_reloc_status_type
|
|
or32_elf_consth_reloc (bfd *abfd ATTRIBUTE_UNUSED,
|
|
arelent *reloc_entry,
|
|
asymbol *symbol,
|
|
void * data,
|
|
asection *input_section,
|
|
bfd *output_bfd,
|
|
char **error_message ATTRIBUTE_UNUSED)
|
|
{
|
|
bfd_reloc_status_type ret;
|
|
bfd_vma relocation;
|
|
struct or32_consth *n;
|
|
|
|
ret = bfd_reloc_ok;
|
|
|
|
if (bfd_is_und_section (symbol->section)
|
|
&& output_bfd == NULL)
|
|
ret = bfd_reloc_undefined;
|
|
|
|
if (bfd_is_com_section (symbol->section))
|
|
relocation = 0;
|
|
else
|
|
relocation = symbol->value;
|
|
|
|
relocation += symbol->section->output_section->vma;
|
|
relocation += symbol->section->output_offset;
|
|
relocation += reloc_entry->addend;
|
|
|
|
if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
|
|
return bfd_reloc_outofrange;
|
|
|
|
/* Save the information, and let LO16 do the actual relocation. */
|
|
n = bfd_malloc (sizeof *n);
|
|
if (n == NULL)
|
|
return bfd_reloc_outofrange;
|
|
n->addr = (bfd_byte *) data + reloc_entry->address;
|
|
n->addend = relocation;
|
|
n->next = or32_consth_list;
|
|
or32_consth_list = n;
|
|
|
|
if (output_bfd != NULL)
|
|
reloc_entry->address += input_section->output_offset;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Do a R_OR32_CONST relocation. This is a straightforward 16 bit
|
|
inplace relocation; this function exists in order to do the
|
|
R_OR32_CONSTH relocation described above. */
|
|
|
|
static bfd_reloc_status_type
|
|
or32_elf_const_reloc (bfd *abfd,
|
|
arelent *reloc_entry,
|
|
asymbol *symbol,
|
|
void * data,
|
|
asection *input_section,
|
|
bfd *output_bfd,
|
|
char **error_message)
|
|
{
|
|
if (or32_consth_list != NULL)
|
|
{
|
|
struct or32_consth *l;
|
|
|
|
l = or32_consth_list;
|
|
while (l != NULL)
|
|
{
|
|
unsigned long insn;
|
|
unsigned long val;
|
|
unsigned long vallo;
|
|
struct or32_consth *next;
|
|
|
|
/* Do the HI16 relocation. Note that we actually don't need
|
|
to know anything about the LO16 itself, except where to
|
|
find the low 16 bits of the addend needed by the LO16. */
|
|
insn = bfd_get_32 (abfd, l->addr);
|
|
vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
|
|
& 0xffff);
|
|
val = ((insn & 0xffff) << 16) + vallo;
|
|
val += l->addend;
|
|
|
|
insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff);
|
|
bfd_put_32 (abfd, insn, l->addr);
|
|
|
|
next = l->next;
|
|
free (l);
|
|
l = next;
|
|
}
|
|
|
|
or32_consth_list = NULL;
|
|
}
|
|
|
|
if (output_bfd != NULL)
|
|
{
|
|
unsigned long insn, tmp;
|
|
bfd_size_type addr = reloc_entry->address;
|
|
|
|
reloc_entry->address += input_section->output_offset;
|
|
|
|
insn = bfd_get_32 (abfd, (bfd_byte *) data + addr);
|
|
tmp = insn & 0x0000ffff;
|
|
tmp += symbol->section->output_section->vma;
|
|
tmp += symbol->section->output_offset;
|
|
tmp += symbol->value;
|
|
insn = (insn & 0xffff0000) | (tmp & 0x0000ffff);
|
|
bfd_put_32 (abfd, insn, (bfd_byte *) data + addr);
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
/* Now do the LO16 reloc in the usual way. */
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
|
input_section, output_bfd, error_message);
|
|
}
|
|
|
|
static bfd_reloc_status_type
|
|
or32_elf_jumptarg_reloc (bfd *abfd,
|
|
arelent *reloc_entry,
|
|
asymbol *symbol ATTRIBUTE_UNUSED,
|
|
void * data,
|
|
asection *input_section,
|
|
bfd *output_bfd,
|
|
char **error_message ATTRIBUTE_UNUSED)
|
|
{
|
|
if (output_bfd != NULL)
|
|
{
|
|
unsigned long insn, tmp;
|
|
bfd_size_type addr = reloc_entry->address;
|
|
|
|
reloc_entry->address += input_section->output_offset;
|
|
|
|
insn = bfd_get_32 (abfd, (bfd_byte *) data + addr);
|
|
tmp = insn | 0xfc000000;
|
|
tmp -= (input_section->output_offset >> 2);
|
|
insn = (insn & 0xfc000000) | (tmp & 0x03ffffff);
|
|
bfd_put_32 (abfd, insn, (bfd_byte *) data + addr);
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
static reloc_howto_type elf_or32_howto_table[] =
|
|
{
|
|
/* This reloc does nothing. */
|
|
HOWTO (R_OR32_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_OR32_NONE", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* A standard 32 bit relocation. */
|
|
HOWTO (R_OR32_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 */
|
|
or32_elf_32_reloc, /* special_function */
|
|
"R_OR32_32", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* A standard 16 bit relocation. */
|
|
HOWTO (R_OR32_16, /* type */
|
|
0, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
or32_elf_16_reloc, /* special_function */
|
|
"R_OR32_16", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* A standard 8 bit relocation. */
|
|
HOWTO (R_OR32_8, /* type */
|
|
0, /* rightshift */
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
|
8, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
or32_elf_8_reloc, /* special_function */
|
|
"R_OR32_8", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x000000ff, /* src_mask */
|
|
0x000000ff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* A standard low 16 bit relocation. */
|
|
HOWTO (R_OR32_CONST, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
or32_elf_const_reloc, /* special_function */
|
|
"R_OR32_CONST", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* A standard high 16 bit relocation. */
|
|
HOWTO (R_OR32_CONSTH, /* type */
|
|
16, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
or32_elf_consth_reloc, /* special_function */
|
|
"R_OR32_CONSTH", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff0000, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* A standard branch relocation. */
|
|
HOWTO (R_OR32_JUMPTARG, /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
28, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
or32_elf_jumptarg_reloc,/* special_function */
|
|
"R_OR32_JUMPTARG", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0x03ffffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* GNU extension to record C++ vtable hierarchy. */
|
|
HOWTO (R_OR32_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_OR32_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_OR32_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_OR32_GNU_VTENTRY", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
};
|
|
|
|
/* Map BFD reloc types to OR32 ELF reloc types. */
|
|
|
|
struct or32_reloc_map
|
|
{
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
|
unsigned char elf_reloc_val;
|
|
};
|
|
|
|
static const struct or32_reloc_map or32_reloc_map[] =
|
|
{
|
|
{ BFD_RELOC_NONE, R_OR32_NONE },
|
|
{ BFD_RELOC_32, R_OR32_32 },
|
|
{ BFD_RELOC_16, R_OR32_16 },
|
|
{ BFD_RELOC_8, R_OR32_8 },
|
|
{ BFD_RELOC_LO16, R_OR32_CONST },
|
|
{ BFD_RELOC_HI16, R_OR32_CONSTH },
|
|
{ BFD_RELOC_32_GOT_PCREL, R_OR32_JUMPTARG },
|
|
{ BFD_RELOC_VTABLE_INHERIT, R_OR32_GNU_VTINHERIT },
|
|
{ BFD_RELOC_VTABLE_ENTRY, R_OR32_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 = ARRAY_SIZE (or32_reloc_map); i--;)
|
|
if (or32_reloc_map[i].bfd_reloc_val == code)
|
|
return &elf_or32_howto_table[or32_reloc_map[i].elf_reloc_val];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Set the howto pointer for an OR32 ELF reloc. */
|
|
|
|
static void
|
|
or32_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_OR32_max);
|
|
cache_ptr->howto = &elf_or32_howto_table[r_type];
|
|
}
|
|
|
|
#define TARGET_LITTLE_SYM bfd_elf32_or32_little_vec
|
|
#define TARGET_LITTLE_NAME "elf32-littleor32"
|
|
#define TARGET_BIG_SYM bfd_elf32_or32_big_vec
|
|
#define TARGET_BIG_NAME "elf32-or32"
|
|
#define ELF_ARCH bfd_arch_or32
|
|
#define ELF_MACHINE_CODE EM_OR32
|
|
#define ELF_MAXPAGESIZE 0x1000
|
|
|
|
#define elf_info_to_howto 0
|
|
#define elf_info_to_howto_rel or32_info_to_howto_rel
|
|
#define elf_backend_object_p or32_elf_object_p
|
|
#define elf_backend_final_write_processing \
|
|
or32_elf_final_write_processing
|
|
|
|
#include "elf32-target.h"
|