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|
/* V850-specific support for 32-bit ELF
Copyright (C) 1994, 1995 Free Software Foundation, Inc.
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"
static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
static void v850_info_to_howto_rel
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
static bfd_reloc_status_type bfd_elf32_v850_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
/* 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
enum reloc_type
{
R_V850_NONE = 0,
R_V850_9_PCREL,
R_V850_22_PCREL,
R_V850_HI16_S,
R_V850_HI16,
R_V850_LO16,
R_V850_32,
R_V850_16,
R_V850_8,
R_V850_max
};
static reloc_howto_type elf_v850_howto_table[] =
{
/* This reloc does nothing. */
HOWTO (R_V850_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_V850_NONE", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* A PC relative 9 bit branch. */
HOWTO (R_V850_9_PCREL, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
26, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf32_v850_reloc, /* special_function */
"R_V850_9_PCREL", /* name */
false, /* partial_inplace */
0x00ffffff, /* src_mask */
0x00ffffff, /* dst_mask */
true), /* pcrel_offset */
/* A PC relative 22 bit branch. */
HOWTO (R_V850_22_PCREL, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
22, /* bitsize */
true, /* pc_relative */
7, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf32_v850_reloc, /* special_function */
"R_V850_22_PCREL", /* name */
false, /* partial_inplace */
0x07ffff80, /* src_mask */
0x07ffff80, /* dst_mask */
true), /* pcrel_offset */
/* High 16 bits of symbol value. */
HOWTO (R_V850_HI16_S, /* 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_elf32_v850_reloc, /* special_function */
"R_V850_HI16_S", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* High 16 bits of symbol value. */
HOWTO (R_V850_HI16, /* 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_elf32_v850_reloc, /* special_function */
"R_V850_HI16", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Low 16 bits of symbol value. */
HOWTO (R_V850_LO16, /* 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_V850_LO16", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Simple 32bit reloc. */
HOWTO (R_V850_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_V850_32", /* name */
true, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* Simple 16bit reloc. */
HOWTO (R_V850_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_V850_16", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Simple 8bit reloc. */
HOWTO (R_V850_8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_V850_8", /* name */
true, /* partial_inplace */
0xff, /* src_mask */
0xff, /* dst_mask */
false), /* pcrel_offset */
};
/* Map BFD reloc types to V850 ELF reloc types. */
struct v850_reloc_map
{
unsigned char bfd_reloc_val;
unsigned char elf_reloc_val;
};
static const struct v850_reloc_map v850_reloc_map[] =
{
{ BFD_RELOC_NONE, R_V850_NONE, },
{ BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL, },
{ BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL, },
{ BFD_RELOC_HI16_S, R_V850_HI16_S, },
{ BFD_RELOC_HI16, R_V850_HI16, },
{ BFD_RELOC_LO16, R_V850_LO16, },
{ BFD_RELOC_32, R_V850_32, },
{ BFD_RELOC_16, R_V850_16, },
{ BFD_RELOC_8, R_V850_8, },
};
static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
bfd *abfd;
bfd_reloc_code_real_type code;
{
unsigned int i;
for (i = 0;
i < sizeof (v850_reloc_map) / sizeof (struct v850_reloc_map);
i++)
{
if (v850_reloc_map[i].bfd_reloc_val == code)
return &elf_v850_howto_table[v850_reloc_map[i].elf_reloc_val];
}
return NULL;
}
/* Set the howto pointer for an V850 ELF reloc. */
static void
v850_info_to_howto_rel (abfd, cache_ptr, dst)
bfd *abfd;
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_V850_max);
cache_ptr->howto = &elf_v850_howto_table[r_type];
}
static bfd_reloc_status_type
bfd_elf32_v850_reloc (abfd, reloc, symbol, data, isection, obfd, err)
bfd *abfd;
arelent *reloc;
asymbol *symbol;
PTR data;
asection *isection;
bfd *obfd;
char **err;
{
if (obfd != (bfd *) NULL
&& (symbol->flags & BSF_SECTION_SYM) == 0
&& (! reloc->howto->partial_inplace
|| reloc->addend == 0))
{
reloc->address += isection->output_offset;
return bfd_reloc_ok;
}
else if (obfd != NULL)
{
return bfd_reloc_continue;
}
/* We handle final linking of some relocs ourselves. */
{
long relocation, insn;
/* Is the address of the relocation really within the section? */
if (reloc->address > isection->_cooked_size)
return bfd_reloc_outofrange;
/* Work out which section the relocation is targetted at and the
initial relocation command value. */
/* Get symbol value. (Common symbols are special.) */
if (bfd_is_com_section (symbol->section))
relocation = 0;
else
relocation = symbol->value;
/* Convert input-section-relative symbol value to absolute + addend. */
relocation += symbol->section->output_section->vma;
relocation += symbol->section->output_offset;
relocation += reloc->addend;
if (reloc->howto->pc_relative == true)
{
/* Here the variable relocation holds the final address of the
symbol we are relocating against, plus any addend. */
relocation -= isection->output_section->vma + isection->output_offset;
/* Deal with pcrel_offset */
relocation -= reloc->address;
}
/* I've got no clue... */
reloc->addend = 0;
if (reloc->howto->type == R_V850_22_PCREL)
{
if (relocation > 0x1ffff || relocation < -0x200000)
return bfd_reloc_overflow;
if ((relocation % 2) != 0)
return bfd_reloc_dangerous;
insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc->address);
insn |= (((relocation & 0xfffe) << 16)
| ((relocation & 0x3f0000) >> 16));
bfd_put_32 (abfd, insn, (bfd_byte *)data + reloc->address);
return bfd_reloc_ok;
}
else if (reloc->howto->type == R_V850_9_PCREL)
{
if (relocation > 0xff || relocation < -0x100)
return bfd_reloc_overflow;
if ((relocation % 2) != 0)
return bfd_reloc_dangerous;
insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc->address);
insn |= ((relocation & 0x1f0) << 7) | ((relocation & 0x0e) << 3);
bfd_put_16 (abfd, insn, (bfd_byte *)data + reloc->address);
return bfd_reloc_ok;
}
else if (reloc->howto->type == R_V850_HI16_S)
{
relocation += bfd_get_16 (abfd, (bfd_byte *) data + reloc->address);
relocation = (relocation >> 16) + ((relocation & 0x8000) != 0);
bfd_put_16 (abfd, relocation, (bfd_byte *)data + reloc->address);
return bfd_reloc_ok;
}
else if (reloc->howto->type == R_V850_HI16)
{
relocation += bfd_get_16 (abfd, (bfd_byte *) data + reloc->address);
relocation = (relocation >> 16);
bfd_put_16 (abfd, relocation, (bfd_byte *)data + reloc->address);
return bfd_reloc_ok;
}
}
return bfd_reloc_continue;
}
static boolean bfd_elf32_v850_is_local_label PARAMS ((bfd *, asymbol *));
/*ARGSUSED*/
static boolean
bfd_elf32_v850_is_local_label (abfd, symbol)
bfd *abfd;
asymbol *symbol;
{
return ((symbol->name[0] == '.' && (symbol->name[1] == 'L' || symbol->name[1] == '.'))
|| (symbol->name[0] == '_' && symbol->name[1] == '.' && symbol->name[2] == 'L'
&& symbol->name[3] == '_'));
}
#define bfd_elf32_bfd_is_local_label bfd_elf32_v850_is_local_label
#define TARGET_LITTLE_SYM bfd_elf32_v850_vec
#define TARGET_LITTLE_NAME "elf32-v850"
#define ELF_ARCH bfd_arch_v850
#define ELF_MACHINE_CODE EM_CYGNUS_V850
#define ELF_MAXPAGESIZE 0x1000
#define elf_info_to_howto 0
#define elf_info_to_howto_rel v850_info_to_howto_rel
#define elf_symbol_leading_char '_'
#include "elf32-target.h"
|
