281 lines
8.9 KiB
C
281 lines
8.9 KiB
C
/* Motorola 68HC11-specific support for 32-bit ELF
|
|
Copyright 1999, 2000 Free Software Foundation, Inc.
|
|
Contributed by Stephane Carrez (stcarrez@worldnet.fr)
|
|
(Heavily copied from the D10V port 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/m68hc11.h"
|
|
|
|
static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
|
|
PARAMS ((bfd * abfd, bfd_reloc_code_real_type code));
|
|
static void m68hc11_info_to_howto_rel
|
|
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
|
|
|
|
/* Use REL instead of RELA to save space */
|
|
#define USE_REL
|
|
|
|
/* The Motorola 68HC11 microcontroler only addresses 64Kb.
|
|
We must handle 8 and 16-bit relocations. The 32-bit relocation
|
|
is defined but not used except by gas when -gstabs is used (which
|
|
is wrong).
|
|
The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */
|
|
static reloc_howto_type elf_m68hc11_howto_table[] = {
|
|
/* This reloc does nothing. */
|
|
HOWTO (R_M68HC11_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_M68HC11_NONE", /* name */
|
|
false, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 8 bit absolute relocation */
|
|
HOWTO (R_M68HC11_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 */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_M68HC11_8", /* name */
|
|
false, /* partial_inplace */
|
|
0x00ff, /* src_mask */
|
|
0x00ff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 8 bit absolute relocation (upper address) */
|
|
HOWTO (R_M68HC11_HI8, /* type */
|
|
8, /* rightshift */
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
|
8, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_M68HC11_HI8", /* name */
|
|
false, /* partial_inplace */
|
|
0x00ff, /* src_mask */
|
|
0x00ff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 8 bit absolute relocation (upper address) */
|
|
HOWTO (R_M68HC11_LO8, /* 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_M68HC11_LO8", /* name */
|
|
false, /* partial_inplace */
|
|
0x00ff, /* src_mask */
|
|
0x00ff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 8 bit PC-rel relocation */
|
|
HOWTO (R_M68HC11_PCREL_8, /* type */
|
|
0, /* rightshift */
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
|
8, /* bitsize */
|
|
true, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_M68HC11_PCREL_8", /* name */
|
|
false, /* partial_inplace */
|
|
0x0, /* src_mask */
|
|
0x00ff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 16 bit absolute relocation */
|
|
HOWTO (R_M68HC11_16, /* type */
|
|
0, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont /*bitfield */ , /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_M68HC11_16", /* name */
|
|
false, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 32 bit absolute relocation. This one is never used for the
|
|
code relocation. It's used by gas for -gstabs generation. */
|
|
HOWTO (R_M68HC11_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_M68HC11_32", /* name */
|
|
false, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 3 bit absolute relocation */
|
|
HOWTO (R_M68HC11_3B, /* type */
|
|
0, /* rightshift */
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
|
3, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_M68HC11_4B", /* name */
|
|
false, /* partial_inplace */
|
|
0x003, /* src_mask */
|
|
0x003, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 16 bit PC-rel relocation */
|
|
HOWTO (R_M68HC11_PCREL_16, /* type */
|
|
0, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
true, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_M68HC11_PCREL_16", /* name */
|
|
false, /* partial_inplace */
|
|
0x0, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* GNU extension to record C++ vtable hierarchy */
|
|
HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */
|
|
0, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
NULL, /* special_function */
|
|
"R_M68HC11_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_M68HC11_GNU_VTENTRY, /* type */
|
|
0, /* rightshift */
|
|
1, /* 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_M68HC11_GNU_VTENTRY", /* name */
|
|
false, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
};
|
|
|
|
/* Map BFD reloc types to M68HC11 ELF reloc types. */
|
|
|
|
struct m68hc11_reloc_map
|
|
{
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
|
unsigned char elf_reloc_val;
|
|
};
|
|
|
|
static const struct m68hc11_reloc_map m68hc11_reloc_map[] = {
|
|
{BFD_RELOC_NONE, R_M68HC11_NONE,},
|
|
{BFD_RELOC_8, R_M68HC11_8},
|
|
{BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8},
|
|
{BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8},
|
|
{BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8},
|
|
{BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16},
|
|
{BFD_RELOC_16, R_M68HC11_16},
|
|
{BFD_RELOC_32, R_M68HC11_32},
|
|
{BFD_RELOC_M68HC11_3B, R_M68HC11_3B},
|
|
|
|
/* The following relocs are defined but they probably don't work yet. */
|
|
{BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT},
|
|
{BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY},
|
|
};
|
|
|
|
static reloc_howto_type *
|
|
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
|
bfd_reloc_code_real_type code;
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0;
|
|
i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map);
|
|
i++)
|
|
{
|
|
if (m68hc11_reloc_map[i].bfd_reloc_val == code)
|
|
return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Set the howto pointer for an M68HC11 ELF reloc. */
|
|
|
|
static void
|
|
m68hc11_info_to_howto_rel (abfd, cache_ptr, dst)
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
|
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_M68HC11_max);
|
|
cache_ptr->howto = &elf_m68hc11_howto_table[r_type];
|
|
}
|
|
|
|
/* Below is the only difference between elf32-m68hc12.c and elf32-m68hc11.c.
|
|
The Motorola spec says to use a different Elf machine code. */
|
|
#define ELF_ARCH bfd_arch_m68hc11
|
|
#define ELF_MACHINE_CODE EM_68HC11
|
|
#define ELF_MAXPAGESIZE 0x1000
|
|
|
|
#define TARGET_BIG_SYM bfd_elf32_m68hc11_vec
|
|
#define TARGET_BIG_NAME "elf32-m68hc11"
|
|
|
|
#define elf_info_to_howto 0
|
|
#define elf_info_to_howto_rel m68hc11_info_to_howto_rel
|
|
#define elf_backend_object_p 0
|
|
#define elf_backend_final_write_processing 0
|
|
|
|
#include "elf32-target.h"
|