459 lines
9.6 KiB
C
459 lines
9.6 KiB
C
/* Disassemble h8300 instructions.
|
|
Copyright 1993, 1994, 1996, 1998, 2000, 2001, 2002
|
|
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. */
|
|
|
|
#define DEFINE_TABLE
|
|
|
|
#include "sysdep.h"
|
|
#define h8_opcodes h8ops
|
|
#include "opcode/h8300.h"
|
|
#include "dis-asm.h"
|
|
#include "opintl.h"
|
|
#include "libiberty.h"
|
|
|
|
struct h8_instruction
|
|
{
|
|
int length;
|
|
const struct h8_opcode *opcode;
|
|
};
|
|
|
|
struct h8_instruction *h8_instructions;
|
|
|
|
static void bfd_h8_disassemble_init PARAMS ((void));
|
|
static unsigned int bfd_h8_disassemble
|
|
PARAMS ((bfd_vma, disassemble_info *, int));
|
|
|
|
/* Run through the opcodes and sort them into order to make them easy
|
|
to disassemble. */
|
|
static void
|
|
bfd_h8_disassemble_init ()
|
|
{
|
|
unsigned int i;
|
|
unsigned int nopcodes;
|
|
const struct h8_opcode *p;
|
|
struct h8_instruction *pi;
|
|
|
|
nopcodes = sizeof (h8_opcodes) / sizeof (struct h8_opcode);
|
|
|
|
h8_instructions = (struct h8_instruction *)
|
|
xmalloc (nopcodes * sizeof (struct h8_instruction));
|
|
|
|
for (p = h8_opcodes, pi = h8_instructions; p->name; p++, pi++)
|
|
{
|
|
int n1 = 0;
|
|
int n2 = 0;
|
|
|
|
if ((int) p->data.nib[0] < 16)
|
|
n1 = (int) p->data.nib[0];
|
|
else
|
|
n1 = 0;
|
|
|
|
if ((int) p->data.nib[1] < 16)
|
|
n2 = (int) p->data.nib[1];
|
|
else
|
|
n2 = 0;
|
|
|
|
/* Just make sure there are an even number of nibbles in it, and
|
|
that the count is the same as the length. */
|
|
for (i = 0; p->data.nib[i] != E; i++)
|
|
;
|
|
|
|
if (i & 1)
|
|
abort ();
|
|
|
|
pi->length = i / 2;
|
|
pi->opcode = p;
|
|
}
|
|
|
|
/* Add entry for the NULL vector terminator. */
|
|
pi->length = 0;
|
|
pi->opcode = p;
|
|
}
|
|
|
|
static unsigned int
|
|
bfd_h8_disassemble (addr, info, mode)
|
|
bfd_vma addr;
|
|
disassemble_info *info;
|
|
int mode;
|
|
{
|
|
/* Find the first entry in the table for this opcode. */
|
|
static const char *regnames[] =
|
|
{
|
|
"r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
|
|
"r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"
|
|
};
|
|
static const char *wregnames[] =
|
|
{
|
|
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
|
|
"e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"
|
|
};
|
|
static const char *lregnames[] =
|
|
{
|
|
"er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7",
|
|
"er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"
|
|
};
|
|
int rs = 0;
|
|
int rd = 0;
|
|
int rdisp = 0;
|
|
int abs = 0;
|
|
int bit = 0;
|
|
int plen = 0;
|
|
static bfd_boolean init = 0;
|
|
const struct h8_instruction *qi;
|
|
char const **pregnames = mode != 0 ? lregnames : wregnames;
|
|
int status;
|
|
int l;
|
|
unsigned char data[20];
|
|
void *stream = info->stream;
|
|
fprintf_ftype fprintf = info->fprintf_func;
|
|
|
|
if (!init)
|
|
{
|
|
bfd_h8_disassemble_init ();
|
|
init = 1;
|
|
}
|
|
|
|
status = info->read_memory_func (addr, data, 2, info);
|
|
if (status != 0)
|
|
{
|
|
info->memory_error_func (status, addr, info);
|
|
return -1;
|
|
}
|
|
|
|
for (l = 2; status == 0 && l < 10; l += 2)
|
|
status = info->read_memory_func (addr + l, data + l, 2, info);
|
|
|
|
/* Find the exact opcode/arg combo. */
|
|
for (qi = h8_instructions; qi->opcode->name; qi++)
|
|
{
|
|
const struct h8_opcode *q = qi->opcode;
|
|
op_type *nib = q->data.nib;
|
|
unsigned int len = 0;
|
|
|
|
while (1)
|
|
{
|
|
op_type looking_for = *nib;
|
|
int thisnib = data[len >> 1];
|
|
|
|
thisnib = (len & 1) ? (thisnib & 0xf) : ((thisnib >> 4) & 0xf);
|
|
|
|
if (looking_for < 16 && looking_for >= 0)
|
|
{
|
|
if (looking_for != thisnib)
|
|
goto fail;
|
|
}
|
|
else
|
|
{
|
|
if ((int) looking_for & (int) B31)
|
|
{
|
|
if (!(((int) thisnib & 0x8) != 0))
|
|
goto fail;
|
|
|
|
looking_for = (op_type) ((int) looking_for & ~(int) B31);
|
|
}
|
|
|
|
if ((int) looking_for & (int) B30)
|
|
{
|
|
if (!(((int) thisnib & 0x8) == 0))
|
|
goto fail;
|
|
|
|
looking_for = (op_type) ((int) looking_for & ~(int) B30);
|
|
}
|
|
|
|
if (looking_for & DBIT)
|
|
{
|
|
/* Exclude adds/subs by looking at bit 0 and 2, and
|
|
make sure the operand size, either w or l,
|
|
matches by looking at bit 1. */
|
|
if ((looking_for & 7) != (thisnib & 7))
|
|
goto fail;
|
|
|
|
abs = (thisnib & 0x8) ? 2 : 1;
|
|
}
|
|
else if (looking_for & (REG | IND | INC | DEC))
|
|
{
|
|
if (looking_for & SRC)
|
|
rs = thisnib;
|
|
else
|
|
rd = thisnib;
|
|
}
|
|
else if (looking_for & L_16)
|
|
{
|
|
abs = (data[len >> 1]) * 256 + data[(len + 2) >> 1];
|
|
plen = 16;
|
|
}
|
|
else if (looking_for & ABSJMP)
|
|
{
|
|
abs = (data[1] << 16) | (data[2] << 8) | (data[3]);
|
|
}
|
|
else if (looking_for & MEMIND)
|
|
{
|
|
abs = data[1];
|
|
}
|
|
else if (looking_for & L_32)
|
|
{
|
|
int i = len >> 1;
|
|
|
|
abs = (data[i] << 24)
|
|
| (data[i + 1] << 16)
|
|
| (data[i + 2] << 8)
|
|
| (data[i + 3]);
|
|
|
|
plen = 32;
|
|
}
|
|
else if (looking_for & L_24)
|
|
{
|
|
int i = len >> 1;
|
|
|
|
abs = (data[i] << 16) | (data[i + 1] << 8) | (data[i + 2]);
|
|
plen = 24;
|
|
}
|
|
else if (looking_for & IGNORE)
|
|
{
|
|
;
|
|
}
|
|
else if (looking_for & DISPREG)
|
|
{
|
|
rdisp = thisnib;
|
|
}
|
|
else if (looking_for & KBIT)
|
|
{
|
|
switch (thisnib)
|
|
{
|
|
case 9:
|
|
abs = 4;
|
|
break;
|
|
case 8:
|
|
abs = 2;
|
|
break;
|
|
case 0:
|
|
abs = 1;
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
}
|
|
else if (looking_for & L_8)
|
|
{
|
|
plen = 8;
|
|
abs = data[len >> 1];
|
|
}
|
|
else if (looking_for & L_3)
|
|
{
|
|
bit = thisnib & 0x7;
|
|
}
|
|
else if (looking_for & L_2)
|
|
{
|
|
plen = 2;
|
|
abs = thisnib & 0x3;
|
|
}
|
|
else if (looking_for & MACREG)
|
|
{
|
|
abs = (thisnib == 3);
|
|
}
|
|
else if (looking_for == E)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < qi->length; i++)
|
|
fprintf (stream, "%02x ", data[i]);
|
|
|
|
for (; i < 6; i++)
|
|
fprintf (stream, " ");
|
|
|
|
fprintf (stream, "%s\t", q->name);
|
|
|
|
/* Gross. Disgusting. */
|
|
if (strcmp (q->name, "ldm.l") == 0)
|
|
{
|
|
int count, high;
|
|
|
|
count = (data[1] >> 4) & 0x3;
|
|
high = data[3] & 0x7;
|
|
|
|
fprintf (stream, "@sp+,er%d-er%d", high - count, high);
|
|
return qi->length;
|
|
}
|
|
|
|
if (strcmp (q->name, "stm.l") == 0)
|
|
{
|
|
int count, low;
|
|
|
|
count = (data[1] >> 4) & 0x3;
|
|
low = data[3] & 0x7;
|
|
|
|
fprintf (stream, "er%d-er%d,@-sp", low, low + count);
|
|
return qi->length;
|
|
}
|
|
|
|
/* Fill in the args. */
|
|
{
|
|
op_type *args = q->args.nib;
|
|
int hadone = 0;
|
|
|
|
while (*args != E)
|
|
{
|
|
int x = *args;
|
|
|
|
if (hadone)
|
|
fprintf (stream, ",");
|
|
|
|
if (x & L_3)
|
|
{
|
|
fprintf (stream, "#0x%x", (unsigned) bit);
|
|
}
|
|
else if (x & (IMM | KBIT | DBIT))
|
|
{
|
|
/* Bletch. For shal #2,er0 and friends. */
|
|
if (*(args + 1) & SRC_IN_DST)
|
|
abs = 2;
|
|
|
|
fprintf (stream, "#0x%x", (unsigned) abs);
|
|
}
|
|
else if (x & REG)
|
|
{
|
|
int rn = (x & DST) ? rd : rs;
|
|
|
|
switch (x & SIZE)
|
|
{
|
|
case L_8:
|
|
fprintf (stream, "%s", regnames[rn]);
|
|
break;
|
|
case L_16:
|
|
fprintf (stream, "%s", wregnames[rn]);
|
|
break;
|
|
case L_P:
|
|
case L_32:
|
|
fprintf (stream, "%s", lregnames[rn]);
|
|
break;
|
|
}
|
|
}
|
|
else if (x & MACREG)
|
|
{
|
|
fprintf (stream, "mac%c", abs ? 'l' : 'h');
|
|
}
|
|
else if (x & INC)
|
|
{
|
|
fprintf (stream, "@%s+", pregnames[rs]);
|
|
}
|
|
else if (x & DEC)
|
|
{
|
|
fprintf (stream, "@-%s", pregnames[rd]);
|
|
}
|
|
else if (x & IND)
|
|
{
|
|
int rn = (x & DST) ? rd : rs;
|
|
fprintf (stream, "@%s", pregnames[rn]);
|
|
}
|
|
else if (x & ABS8MEM)
|
|
{
|
|
fprintf (stream, "@0x%x:8", (unsigned) abs);
|
|
}
|
|
else if (x & (ABS | ABSJMP))
|
|
{
|
|
fprintf (stream, "@0x%x:%d", (unsigned) abs, plen);
|
|
}
|
|
else if (x & MEMIND)
|
|
{
|
|
fprintf (stream, "@@%d (%x)", abs, abs);
|
|
}
|
|
else if (x & PCREL)
|
|
{
|
|
if (x & L_16)
|
|
{
|
|
abs += 2;
|
|
fprintf (stream,
|
|
".%s%d (%x)",
|
|
(short) abs > 0 ? "+" : "",
|
|
(short) abs, addr + (short) abs + 2);
|
|
}
|
|
else
|
|
{
|
|
fprintf (stream,
|
|
".%s%d (%x)",
|
|
(char) abs > 0 ? "+" : "",
|
|
(char) abs, addr + (char) abs + 2);
|
|
}
|
|
}
|
|
else if (x & DISP)
|
|
{
|
|
fprintf (stream, "@(0x%x:%d,%s)",
|
|
abs, plen, pregnames[rdisp]);
|
|
}
|
|
else if (x & CCR)
|
|
{
|
|
fprintf (stream, "ccr");
|
|
}
|
|
else if (x & EXR)
|
|
{
|
|
fprintf (stream, "exr");
|
|
}
|
|
else
|
|
/* xgettext:c-format */
|
|
fprintf (stream, _("Hmmmm %x"), x);
|
|
|
|
hadone = 1;
|
|
args++;
|
|
}
|
|
}
|
|
|
|
return qi->length;
|
|
}
|
|
else
|
|
/* xgettext:c-format */
|
|
fprintf (stream, _("Don't understand %x \n"), looking_for);
|
|
}
|
|
|
|
len++;
|
|
nib++;
|
|
}
|
|
|
|
fail:
|
|
;
|
|
}
|
|
|
|
/* Fell off the end. */
|
|
fprintf (stream, "%02x %02x .word\tH'%x,H'%x",
|
|
data[0], data[1],
|
|
data[0], data[1]);
|
|
return 2;
|
|
}
|
|
|
|
int
|
|
print_insn_h8300 (addr, info)
|
|
bfd_vma addr;
|
|
disassemble_info *info;
|
|
{
|
|
return bfd_h8_disassemble (addr, info, 0);
|
|
}
|
|
|
|
int
|
|
print_insn_h8300h (addr, info)
|
|
bfd_vma addr;
|
|
disassemble_info *info;
|
|
{
|
|
return bfd_h8_disassemble (addr, info, 1);
|
|
}
|
|
|
|
int
|
|
print_insn_h8300s (addr, info)
|
|
bfd_vma addr;
|
|
disassemble_info *info;
|
|
{
|
|
return bfd_h8_disassemble (addr, info, 2);
|
|
}
|