1 /* Disassemble h8300 instructions.
2 Copyright 1993, 1994, 1996, 1998, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 #define h8_opcodes h8ops
23 #include "opcode/h8300.h"
26 #include "libiberty.h"
31 const struct h8_opcode
*opcode
;
34 struct h8_instruction
*h8_instructions
;
36 static void bfd_h8_disassemble_init
PARAMS ((void));
37 static unsigned int bfd_h8_disassemble
38 PARAMS ((bfd_vma
, disassemble_info
*, int));
40 /* Run through the opcodes and sort them into order to make them easy
43 bfd_h8_disassemble_init ()
46 unsigned int nopcodes
;
47 const struct h8_opcode
*p
;
48 struct h8_instruction
*pi
;
50 nopcodes
= sizeof (h8_opcodes
) / sizeof (struct h8_opcode
);
52 h8_instructions
= (struct h8_instruction
*)
53 xmalloc (nopcodes
* sizeof (struct h8_instruction
));
55 for (p
= h8_opcodes
, pi
= h8_instructions
; p
->name
; p
++, pi
++)
60 if ((int) p
->data
.nib
[0] < 16)
61 n1
= (int) p
->data
.nib
[0];
65 if ((int) p
->data
.nib
[1] < 16)
66 n2
= (int) p
->data
.nib
[1];
70 /* Just make sure there are an even number of nibbles in it, and
71 that the count is the same as the length. */
72 for (i
= 0; p
->data
.nib
[i
] != E
; i
++)
82 /* Add entry for the NULL vector terminator. */
88 bfd_h8_disassemble (addr
, info
, mode
)
90 disassemble_info
*info
;
93 /* Find the first entry in the table for this opcode. */
94 static const char *regnames
[] =
96 "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
97 "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"
99 static const char *wregnames
[] =
101 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
102 "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"
104 static const char *lregnames
[] =
106 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7",
107 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"
115 static bfd_boolean init
= 0;
116 const struct h8_instruction
*qi
;
117 char const **pregnames
= mode
!= 0 ? lregnames
: wregnames
;
120 unsigned char data
[20];
121 void *stream
= info
->stream
;
122 fprintf_ftype fprintf
= info
->fprintf_func
;
126 bfd_h8_disassemble_init ();
130 status
= info
->read_memory_func (addr
, data
, 2, info
);
133 info
->memory_error_func (status
, addr
, info
);
137 for (l
= 2; status
== 0 && l
< 10; l
+= 2)
138 status
= info
->read_memory_func (addr
+ l
, data
+ l
, 2, info
);
140 /* Find the exact opcode/arg combo. */
141 for (qi
= h8_instructions
; qi
->opcode
->name
; qi
++)
143 const struct h8_opcode
*q
= qi
->opcode
;
144 op_type
*nib
= q
->data
.nib
;
145 unsigned int len
= 0;
149 op_type looking_for
= *nib
;
150 int thisnib
= data
[len
>> 1];
152 thisnib
= (len
& 1) ? (thisnib
& 0xf) : ((thisnib
>> 4) & 0xf);
154 if (looking_for
< 16 && looking_for
>= 0)
156 if (looking_for
!= thisnib
)
161 if ((int) looking_for
& (int) B31
)
163 if (!(((int) thisnib
& 0x8) != 0))
166 looking_for
= (op_type
) ((int) looking_for
& ~(int) B31
);
169 if ((int) looking_for
& (int) B30
)
171 if (!(((int) thisnib
& 0x8) == 0))
174 looking_for
= (op_type
) ((int) looking_for
& ~(int) B30
);
177 if (looking_for
& DBIT
)
179 /* Exclude adds/subs by looking at bit 0 and 2, and
180 make sure the operand size, either w or l,
181 matches by looking at bit 1. */
182 if ((looking_for
& 7) != (thisnib
& 7))
185 abs
= (thisnib
& 0x8) ? 2 : 1;
187 else if (looking_for
& (REG
| IND
| INC
| DEC
))
189 if (looking_for
& SRC
)
194 else if (looking_for
& L_16
)
196 abs
= (data
[len
>> 1]) * 256 + data
[(len
+ 2) >> 1];
199 else if (looking_for
& ABSJMP
)
201 abs
= (data
[1] << 16) | (data
[2] << 8) | (data
[3]);
203 else if (looking_for
& MEMIND
)
207 else if (looking_for
& L_32
)
211 abs
= (data
[i
] << 24)
212 | (data
[i
+ 1] << 16)
218 else if (looking_for
& L_24
)
222 abs
= (data
[i
] << 16) | (data
[i
+ 1] << 8) | (data
[i
+ 2]);
225 else if (looking_for
& IGNORE
)
229 else if (looking_for
& DISPREG
)
233 else if (looking_for
& KBIT
)
250 else if (looking_for
& L_8
)
253 abs
= data
[len
>> 1];
255 else if (looking_for
& L_3
)
259 else if (looking_for
& L_2
)
264 else if (looking_for
& MACREG
)
266 abs
= (thisnib
== 3);
268 else if (looking_for
== E
)
272 for (i
= 0; i
< qi
->length
; i
++)
273 fprintf (stream
, "%02x ", data
[i
]);
276 fprintf (stream
, " ");
278 fprintf (stream
, "%s\t", q
->name
);
280 /* Gross. Disgusting. */
281 if (strcmp (q
->name
, "ldm.l") == 0)
285 count
= (data
[1] >> 4) & 0x3;
286 high
= data
[3] & 0x7;
288 fprintf (stream
, "@sp+,er%d-er%d", high
- count
, high
);
292 if (strcmp (q
->name
, "stm.l") == 0)
296 count
= (data
[1] >> 4) & 0x3;
299 fprintf (stream
, "er%d-er%d,@-sp", low
, low
+ count
);
303 /* Fill in the args. */
305 op_type
*args
= q
->args
.nib
;
313 fprintf (stream
, ",");
317 fprintf (stream
, "#0x%x", (unsigned) bit
);
319 else if (x
& (IMM
| KBIT
| DBIT
))
321 /* Bletch. For shal #2,er0 and friends. */
322 if (*(args
+ 1) & SRC_IN_DST
)
325 fprintf (stream
, "#0x%x", (unsigned) abs
);
329 int rn
= (x
& DST
) ? rd
: rs
;
334 fprintf (stream
, "%s", regnames
[rn
]);
337 fprintf (stream
, "%s", wregnames
[rn
]);
341 fprintf (stream
, "%s", lregnames
[rn
]);
347 fprintf (stream
, "mac%c", abs
? 'l' : 'h');
351 fprintf (stream
, "@%s+", pregnames
[rs
]);
355 fprintf (stream
, "@-%s", pregnames
[rd
]);
359 int rn
= (x
& DST
) ? rd
: rs
;
360 fprintf (stream
, "@%s", pregnames
[rn
]);
362 else if (x
& ABS8MEM
)
364 fprintf (stream
, "@0x%x:8", (unsigned) abs
);
366 else if (x
& (ABS
| ABSJMP
))
368 fprintf (stream
, "@0x%x:%d", (unsigned) abs
, plen
);
372 fprintf (stream
, "@@%d (%x)", abs
, abs
);
381 (short) abs
> 0 ? "+" : "",
382 (short) abs
, addr
+ (short) abs
+ 2);
388 (char) abs
> 0 ? "+" : "",
389 (char) abs
, addr
+ (char) abs
+ 2);
394 fprintf (stream
, "@(0x%x:%d,%s)",
395 abs
, plen
, pregnames
[rdisp
]);
399 fprintf (stream
, "ccr");
403 fprintf (stream
, "exr");
406 /* xgettext:c-format */
407 fprintf (stream
, _("Hmmmm %x"), x
);
417 /* xgettext:c-format */
418 fprintf (stream
, _("Don't understand %x \n"), looking_for
);
429 /* Fell off the end. */
430 fprintf (stream
, "%02x %02x .word\tH'%x,H'%x",
437 print_insn_h8300 (addr
, info
)
439 disassemble_info
*info
;
441 return bfd_h8_disassemble (addr
, info
, 0);
445 print_insn_h8300h (addr
, info
)
447 disassemble_info
*info
;
449 return bfd_h8_disassemble (addr
, info
, 1);
453 print_insn_h8300s (addr
, info
)
455 disassemble_info
*info
;
457 return bfd_h8_disassemble (addr
, info
, 2);
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