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/* Disassemble h8500 instructions.
Copyright (C) 1993 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>
#define DISASSEMBLER_TABLE
#define DEFINE_TABLE
#include "h8500-opc.h"
#include "dis-asm.h"
/* Maximum length of an instruction. */
#define MAXLEN 8
#include <setjmp.h>
struct private
{
/* Points to first byte not fetched. */
bfd_byte *max_fetched;
bfd_byte the_buffer[MAXLEN];
bfd_vma insn_start;
jmp_buf bailout;
};
/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
to ADDR (exclusive) are valid. Returns 1 for success, longjmps
on error. */
#define FETCH_DATA(info, addr) \
((addr) <= ((struct private *)(info->private_data))->max_fetched \
? 1 : fetch_data ((info), (addr)))
static int
fetch_data (info, addr)
struct disassemble_info *info;
bfd_byte *addr;
{
int status;
struct private *priv = (struct private *) info->private_data;
bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer);
status = (*info->read_memory_func) (start,
priv->max_fetched,
addr - priv->max_fetched,
info);
if (status != 0)
{
(*info->memory_error_func) (status, start, info);
longjmp (priv->bailout, 1);
}
else
priv->max_fetched = addr;
return 1;
}
static char *crname[] =
{"sr", "ccr", "*", "br", "ep", "dp", "*", "tp"};
int
print_insn_h8500 (addr, info)
bfd_vma addr;
disassemble_info *info;
{
h8500_opcode_info *opcode;
void *stream = info->stream;
fprintf_ftype func = info->fprintf_func;
struct private priv;
bfd_byte *buffer = priv.the_buffer;
info->private_data = (PTR) & priv;
priv.max_fetched = priv.the_buffer;
priv.insn_start = addr;
if (setjmp (priv.bailout) != 0)
/* Error return. */
return -1;
if (0) {
static int one;
if (!one )
{
one = 1;
for (opcode = h8500_table; opcode->name; opcode++)
{
if ((opcode->bytes[0].contents & 0x8) == 0)
printf("%s\n", opcode->name);
}
}
}
/* Run down the table to find the one which matches */
for (opcode = h8500_table; opcode->name; opcode++)
{
int byte;
int rn;
int rd;
int rs;
int disp;
int abs;
int imm;
int pcrel;
int qim;
int i;
int cr;
for (byte = 0; byte < opcode->length; byte++)
{
FETCH_DATA (info, buffer + byte + 1);
if ((buffer[byte] & opcode->bytes[byte].mask)
!= (opcode->bytes[byte].contents))
{
goto next;
}
else
{
/* extract any info parts */
switch (opcode->bytes[byte].insert)
{
case 0:
case FP:
break;
default:
func (stream, "can't cope with insert %d\n",
opcode->bytes[byte].insert);
break;
case RN:
rn = buffer[byte] & 0x7;
break;
case RS:
rs = buffer[byte] & 0x7;
break;
case CRB:
cr = buffer[byte] & 0x7;
if (cr == 0)
goto next;
break;
case CRW:
cr = buffer[byte] & 0x7;
if (cr != 0)
goto next;
break;
case DISP16:
FETCH_DATA (info, buffer + byte + 2);
disp = (buffer[byte] << 8) | (buffer[byte + 1]);
break;
case FPIND_D8:
case DISP8:
disp = ((char) (buffer[byte]));
break;
case RD:
case RDIND:
rd = buffer[byte] & 0x7;
break;
case ABS24:
FETCH_DATA (info, buffer + byte + 3);
abs =
(buffer[byte] << 16)
| (buffer[byte + 1] << 8)
| (buffer[byte + 2]);
break;
case ABS16:
FETCH_DATA (info, buffer + byte + 2);
abs = (buffer[byte] << 8) | (buffer[byte + 1]);
break;
case ABS8:
abs = (buffer[byte]);
break;
case IMM16:
FETCH_DATA (info, buffer + byte + 2);
imm = (buffer[byte] << 8) | (buffer[byte + 1]);
break;
case IMM4:
imm = (buffer[byte]) & 0xf;
break;
case IMM8:
case RLIST:
imm = (buffer[byte]);
break;
case PCREL16:
FETCH_DATA (info, buffer + byte + 2);
pcrel = (buffer[byte] << 8) | (buffer[byte + 1]);
break;
case PCREL8:
pcrel = (buffer[byte]);
break;
case QIM:
switch (buffer[byte] & 0x7)
{
case 0:
qim = 1;
break;
case 1:
qim = 2;
break;
case 4:
qim = -1;
break;
case 5:
qim = -2;
break;
}
break;
}
}
}
/* We get here when all the masks have passed so we can output the
operands*/
FETCH_DATA (info, buffer + opcode->length);
for (i = 0; i < opcode->length; i++)
{
(func) (stream, "%02x ", buffer[i]);
}
for (; i < 6; i++)
{
(func) (stream, " ");
}
(func) (stream, "%s\t", opcode->name);
for (i = 0; i < opcode->nargs; i++)
{
if (i)
(func) (stream, ",");
switch (opcode->arg_type[i])
{
case FP:
func (stream, "fp");
break;
case RNIND_D16:
func (stream, "@(0x%x:16,r%d)", disp, rn);
break;
case RNIND_D8:
func (stream, "@(0x%x:8 (%d),r%d)", disp & 0xff, disp, rn);
break;
case RDIND_D16:
func (stream, "@(0x%x:16,r%d)", disp, rd);
break;
case RDIND_D8:
func (stream, "@(0x%x:8 (%d), r%d)", disp & 0xff, disp, rd);
break;
case FPIND_D8:
func (stream, "@(0x%x:8 (%d), fp)", disp & 0xff, disp, rn);
break;
case CRB:
case CRW:
func (stream, "%s", crname[cr]);
break;
case RN:
func (stream, "r%d", rn);
break;
case RD:
func (stream, "r%d", rd);
break;
case RS:
func (stream, "r%d", rs);
break;
case RNDEC:
func (stream, "@-r%d", rn);
break;
case RNINC:
func (stream, "@r%d+", rn);
break;
case RNIND:
func (stream, "@r%d", rn);
break;
case RDIND:
func (stream, "@r%d", rd);
break;
case SPINC:
func (stream, "@sp+");
break;
case SPDEC:
func (stream, "@-sp");
break;
case ABS24:
func (stream, "@0x%0x:24", abs);
break;
case ABS16:
func (stream, "@0x%0x:16", abs & 0xffff);
break;
case ABS8:
func (stream, "@0x%0x:8", abs & 0xff);
break;
case IMM16:
func (stream, "#0x%0x:16", imm & 0xffff);
break;
case RLIST:
{
int i;
int nc = 0;
func (stream, "(");
for (i = 0; i < 8; i++)
{
if (imm & (1 << i))
{
func (stream, "r%d", i);
if (nc)
func (stream, ",");
nc = 1;
}
}
func (stream, ")");
}
break;
case IMM8:
func (stream, "#0x%0x:8", imm & 0xff);
break;
case PCREL16:
func (stream, "0x%0x:16", (pcrel + addr + opcode->length) & 0xffff);
break;
case PCREL8:
func (stream, "#0x%0x:8",
((char) pcrel + addr + opcode->length) & 0xffff);
break;
case QIM:
func (stream, "#%d:q", qim);
break;
case IMM4:
func (stream, "#%d:4", imm);
break;
}
}
return opcode->length;
next:;
}
/* Couldn't understand anything */
func (stream, "%02x\t\t*unknown*", buffer[0]);
return 1;
}
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