342 lines
8.7 KiB
C
342 lines
8.7 KiB
C
/* Disassemble MN10200 instructions.
|
|
Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
|
|
|
|
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 <stdio.h>
|
|
|
|
#include "ansidecl.h"
|
|
#include "opcode/mn10200.h"
|
|
#include "dis-asm.h"
|
|
#include "opintl.h"
|
|
|
|
static void disassemble PARAMS ((bfd_vma, struct disassemble_info *,
|
|
unsigned long insn, unsigned long,
|
|
unsigned int));
|
|
|
|
int
|
|
print_insn_mn10200 (memaddr, info)
|
|
bfd_vma memaddr;
|
|
struct disassemble_info *info;
|
|
{
|
|
int status;
|
|
bfd_byte buffer[4];
|
|
unsigned long insn;
|
|
unsigned long extension = 0;
|
|
unsigned int consume;
|
|
|
|
/* First figure out how big the opcode is. */
|
|
status = (*info->read_memory_func) (memaddr, buffer, 1, info);
|
|
if (status != 0)
|
|
{
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|
return -1;
|
|
}
|
|
|
|
insn = *(unsigned char *) buffer;
|
|
|
|
/* These are one byte insns. */
|
|
if ((insn & 0xf0) == 0x00
|
|
|| (insn & 0xf0) == 0x10
|
|
|| (insn & 0xf0) == 0x20
|
|
|| (insn & 0xf0) == 0x30
|
|
|| ((insn & 0xf0) == 0x80
|
|
&& (insn & 0x0c) >> 2 != (insn & 0x03))
|
|
|| (insn & 0xf0) == 0x90
|
|
|| (insn & 0xf0) == 0xa0
|
|
|| (insn & 0xf0) == 0xb0
|
|
|| (insn & 0xff) == 0xeb
|
|
|| (insn & 0xff) == 0xf6
|
|
|| (insn & 0xff) == 0xfe
|
|
|| (insn & 0xff) == 0xff)
|
|
{
|
|
extension = 0;
|
|
consume = 1;
|
|
}
|
|
|
|
/* These are two byte insns. */
|
|
else if ((insn & 0xf0) == 0x40
|
|
|| (insn & 0xf0) == 0x50
|
|
|| (insn & 0xf0) == 0x60
|
|
|| (insn & 0xf0) == 0x70
|
|
|| (insn & 0xf0) == 0x80
|
|
|| (insn & 0xfc) == 0xd0
|
|
|| (insn & 0xfc) == 0xd4
|
|
|| (insn & 0xfc) == 0xd8
|
|
|| (insn & 0xfc) == 0xe0
|
|
|| (insn & 0xfc) == 0xe4
|
|
|| (insn & 0xff) == 0xe8
|
|
|| (insn & 0xff) == 0xe9
|
|
|| (insn & 0xff) == 0xea
|
|
|| (insn & 0xff) == 0xf0
|
|
|| (insn & 0xff) == 0xf1
|
|
|| (insn & 0xff) == 0xf2
|
|
|| (insn & 0xff) == 0xf3)
|
|
{
|
|
status = (*info->read_memory_func) (memaddr, buffer, 2, info);
|
|
if (status != 0)
|
|
{
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|
return -1;
|
|
}
|
|
insn = bfd_getb16 (buffer);
|
|
consume = 2;
|
|
}
|
|
|
|
/* These are three byte insns with a 16bit operand in little
|
|
endian form. */
|
|
else if ((insn & 0xf0) == 0xc0
|
|
|| (insn & 0xfc) == 0xdc
|
|
|| (insn & 0xfc) == 0xec
|
|
|| (insn & 0xff) == 0xf8
|
|
|| (insn & 0xff) == 0xf9
|
|
|| (insn & 0xff) == 0xfa
|
|
|| (insn & 0xff) == 0xfb
|
|
|| (insn & 0xff) == 0xfc
|
|
|| (insn & 0xff) == 0xfd)
|
|
{
|
|
status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info);
|
|
if (status != 0)
|
|
{
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|
return -1;
|
|
}
|
|
insn <<= 16;
|
|
insn |= bfd_getl16 (buffer);
|
|
extension = 0;
|
|
consume = 3;
|
|
}
|
|
/* These are three byte insns too, but we don't have to mess with
|
|
endianness stuff. */
|
|
else if ((insn & 0xff) == 0xf5)
|
|
{
|
|
status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info);
|
|
if (status != 0)
|
|
{
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|
return -1;
|
|
}
|
|
insn <<= 16;
|
|
insn |= bfd_getb16 (buffer);
|
|
extension = 0;
|
|
consume = 3;
|
|
}
|
|
|
|
/* These are four byte insns. */
|
|
else if ((insn & 0xff) == 0xf7)
|
|
{
|
|
status = (*info->read_memory_func) (memaddr, buffer, 2, info);
|
|
if (status != 0)
|
|
{
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|
return -1;
|
|
}
|
|
insn = bfd_getb16 (buffer);
|
|
insn <<= 16;
|
|
status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info);
|
|
if (status != 0)
|
|
{
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|
return -1;
|
|
}
|
|
insn |= bfd_getl16 (buffer);
|
|
extension = 0;
|
|
consume = 4;
|
|
}
|
|
|
|
/* These are five byte insns. */
|
|
else if ((insn & 0xff) == 0xf4)
|
|
{
|
|
status = (*info->read_memory_func) (memaddr, buffer, 2, info);
|
|
if (status != 0)
|
|
{
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|
return -1;
|
|
}
|
|
insn = bfd_getb16 (buffer);
|
|
insn <<= 16;
|
|
|
|
status = (*info->read_memory_func) (memaddr + 4, buffer, 1, info);
|
|
if (status != 0)
|
|
{
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|
return -1;
|
|
}
|
|
insn |= (*(unsigned char *)buffer << 8) & 0xff00;
|
|
|
|
status = (*info->read_memory_func) (memaddr + 3, buffer, 1, info);
|
|
if (status != 0)
|
|
{
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|
return -1;
|
|
}
|
|
insn |= (*(unsigned char *)buffer) & 0xff;
|
|
|
|
status = (*info->read_memory_func) (memaddr + 2, buffer, 1, info);
|
|
if (status != 0)
|
|
{
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|
return -1;
|
|
}
|
|
extension = (*(unsigned char *)buffer) & 0xff;
|
|
consume = 5;
|
|
}
|
|
else
|
|
{
|
|
(*info->fprintf_func) (info->stream, _("unknown\t0x%02x"), insn);
|
|
return 1;
|
|
}
|
|
|
|
disassemble (memaddr, info, insn, extension, consume);
|
|
|
|
return consume;
|
|
}
|
|
|
|
static void
|
|
disassemble (memaddr, info, insn, extension, size)
|
|
bfd_vma memaddr;
|
|
struct disassemble_info *info;
|
|
unsigned long insn;
|
|
unsigned long extension;
|
|
unsigned int size;
|
|
{
|
|
struct mn10200_opcode *op = (struct mn10200_opcode *)mn10200_opcodes;
|
|
const struct mn10200_operand *operand;
|
|
int match = 0;
|
|
|
|
/* Find the opcode. */
|
|
while (op->name)
|
|
{
|
|
int mysize, extra_shift;
|
|
|
|
if (op->format == FMT_1)
|
|
mysize = 1;
|
|
else if (op->format == FMT_2
|
|
|| op->format == FMT_4)
|
|
mysize = 2;
|
|
else if (op->format == FMT_3
|
|
|| op->format == FMT_5)
|
|
mysize = 3;
|
|
else if (op->format == FMT_6)
|
|
mysize = 4;
|
|
else if (op->format == FMT_7)
|
|
mysize = 5;
|
|
else
|
|
abort ();
|
|
|
|
if (op->format == FMT_2 || op->format == FMT_5)
|
|
extra_shift = 8;
|
|
else if (op->format == FMT_3
|
|
|| op->format == FMT_6
|
|
|| op->format == FMT_7)
|
|
extra_shift = 16;
|
|
else
|
|
extra_shift = 0;
|
|
|
|
if ((op->mask & insn) == op->opcode
|
|
&& size == (unsigned int) mysize)
|
|
{
|
|
const unsigned char *opindex_ptr;
|
|
unsigned int nocomma;
|
|
int paren = 0;
|
|
|
|
match = 1;
|
|
(*info->fprintf_func) (info->stream, "%s\t", op->name);
|
|
|
|
/* Now print the operands. */
|
|
for (opindex_ptr = op->operands, nocomma = 1;
|
|
*opindex_ptr != 0;
|
|
opindex_ptr++)
|
|
{
|
|
unsigned long value;
|
|
|
|
operand = &mn10200_operands[*opindex_ptr];
|
|
|
|
if ((operand->flags & MN10200_OPERAND_EXTENDED) != 0)
|
|
{
|
|
value = (insn & 0xffff) << 8;
|
|
value |= extension;
|
|
}
|
|
else
|
|
{
|
|
value = ((insn >> (operand->shift))
|
|
& ((1L << operand->bits) - 1L));
|
|
}
|
|
|
|
if ((operand->flags & MN10200_OPERAND_SIGNED) != 0)
|
|
value = ((long)(value << (32 - operand->bits))
|
|
>> (32 - operand->bits));
|
|
|
|
if (!nocomma
|
|
&& (!paren
|
|
|| ((operand->flags & MN10200_OPERAND_PAREN) == 0)))
|
|
(*info->fprintf_func) (info->stream, ",");
|
|
|
|
nocomma = 0;
|
|
|
|
if ((operand->flags & MN10200_OPERAND_DREG) != 0)
|
|
{
|
|
value = ((insn >> (operand->shift + extra_shift))
|
|
& ((1 << operand->bits) - 1));
|
|
(*info->fprintf_func) (info->stream, "d%d", value);
|
|
}
|
|
|
|
else if ((operand->flags & MN10200_OPERAND_AREG) != 0)
|
|
{
|
|
value = ((insn >> (operand->shift + extra_shift))
|
|
& ((1 << operand->bits) - 1));
|
|
(*info->fprintf_func) (info->stream, "a%d", value);
|
|
}
|
|
|
|
else if ((operand->flags & MN10200_OPERAND_PSW) != 0)
|
|
(*info->fprintf_func) (info->stream, "psw");
|
|
|
|
else if ((operand->flags & MN10200_OPERAND_MDR) != 0)
|
|
(*info->fprintf_func) (info->stream, "mdr");
|
|
|
|
else if ((operand->flags & MN10200_OPERAND_PAREN) != 0)
|
|
{
|
|
if (paren)
|
|
(*info->fprintf_func) (info->stream, ")");
|
|
else
|
|
{
|
|
(*info->fprintf_func) (info->stream, "(");
|
|
nocomma = 1;
|
|
}
|
|
paren = !paren;
|
|
}
|
|
|
|
else if ((operand->flags & MN10200_OPERAND_PCREL) != 0)
|
|
(*info->print_address_func) ((value + memaddr + mysize) & 0xffffff, info);
|
|
|
|
else if ((operand->flags & MN10200_OPERAND_MEMADDR) != 0)
|
|
(*info->print_address_func) (value, info);
|
|
|
|
else
|
|
(*info->fprintf_func) (info->stream, "%ld", value);
|
|
}
|
|
/* All done. */
|
|
break;
|
|
}
|
|
op++;
|
|
}
|
|
|
|
if (!match)
|
|
{
|
|
(*info->fprintf_func) (info->stream, _("unknown\t0x%04lx"), insn);
|
|
}
|
|
}
|