1 /* Disassemble z8000 code.
2 Copyright 1992, 1993, 1998, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GNU Binutils.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
30 /* These are all indexed by nibble number (i.e only every other entry
31 of bytes is used, and every 4th entry of words). */
32 unsigned char nibbles
[24];
33 unsigned char bytes
[24];
34 unsigned short words
[24];
36 /* Nibble number of first word not yet fetched. */
42 char instr_asmsrc
[80];
43 unsigned long arg_reg
[0x0f];
44 unsigned long immediate
;
45 unsigned long displacement
;
46 unsigned long address
;
47 unsigned long cond_code
;
48 unsigned long ctrl_code
;
50 unsigned long interrupts
;
53 static int fetch_data
PARAMS ((struct disassemble_info
*, int));
56 /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
57 to ADDR (exclusive) are valid. Returns 1 for success, longjmps
59 #define FETCH_DATA(info, nibble) \
60 ((nibble) < ((instr_data_s *) (info->private_data))->max_fetched \
61 ? 1 : fetch_data ((info), (nibble)))
64 fetch_data (info
, nibble
)
65 struct disassemble_info
*info
;
68 unsigned char mybuf
[20];
70 instr_data_s
*priv
= (instr_data_s
*) info
->private_data
;
72 if ((nibble
% 4) != 0)
75 status
= (*info
->read_memory_func
) (priv
->insn_start
,
81 (*info
->memory_error_func
) (status
, priv
->insn_start
, info
);
82 longjmp (priv
->bailout
, 1);
87 unsigned char *p
= mybuf
;
89 for (i
= 0; i
< nibble
;)
91 priv
->words
[i
] = (p
[0] << 8) | p
[1];
94 priv
->nibbles
[i
++] = *p
>> 4;
95 priv
->nibbles
[i
++] = *p
& 0xf;
99 priv
->nibbles
[i
++] = *p
>> 4;
100 priv
->nibbles
[i
++] = *p
& 0xf;
105 priv
->max_fetched
= nibble
;
109 static char *codes
[16] = {
128 static char *ctrl_names
[8] = {
139 static int seg_length
;
140 static int print_insn_z8k
PARAMS ((bfd_vma
, disassemble_info
*, int));
141 int z8k_lookup_instr
PARAMS ((unsigned char *, disassemble_info
*));
142 static void output_instr
143 PARAMS ((instr_data_s
*, unsigned long, disassemble_info
*));
144 static void unpack_instr
PARAMS ((instr_data_s
*, int, disassemble_info
*));
145 static void unparse_instr
PARAMS ((instr_data_s
*, int));
148 print_insn_z8k (addr
, info
, is_segmented
)
150 disassemble_info
*info
;
153 instr_data_s instr_data
;
155 info
->private_data
= (PTR
) &instr_data
;
156 instr_data
.max_fetched
= 0;
157 instr_data
.insn_start
= addr
;
158 if (setjmp (instr_data
.bailout
) != 0)
162 instr_data
.tabl_index
= z8k_lookup_instr (instr_data
.nibbles
, info
);
163 if (instr_data
.tabl_index
> 0)
165 unpack_instr (&instr_data
, is_segmented
, info
);
166 unparse_instr (&instr_data
, is_segmented
);
167 output_instr (&instr_data
, addr
, info
);
168 return z8k_table
[instr_data
.tabl_index
].length
+ seg_length
;
172 FETCH_DATA (info
, 4);
173 (*info
->fprintf_func
) (info
->stream
, ".word %02x%02x",
174 instr_data
.bytes
[0], instr_data
.bytes
[2]);
180 print_insn_z8001 (addr
, info
)
182 disassemble_info
*info
;
184 return print_insn_z8k (addr
, info
, 1);
188 print_insn_z8002 (addr
, info
)
190 disassemble_info
*info
;
192 return print_insn_z8k (addr
, info
, 0);
196 z8k_lookup_instr (nibbles
, info
)
197 unsigned char *nibbles
;
198 disassemble_info
*info
;
201 int nibl_index
, tabl_index
;
203 unsigned short instr_nibl
;
204 unsigned short tabl_datum
, datum_class
, datum_value
;
208 while (!nibl_matched
&& z8k_table
[tabl_index
].name
)
212 nibl_index
< z8k_table
[tabl_index
].length
* 2 && nibl_matched
;
215 if ((nibl_index
% 4) == 0)
216 /* Fetch one word at a time. */
217 FETCH_DATA (info
, nibl_index
+ 4);
218 instr_nibl
= nibbles
[nibl_index
];
220 tabl_datum
= z8k_table
[tabl_index
].byte_info
[nibl_index
];
221 datum_class
= tabl_datum
& CLASS_MASK
;
222 datum_value
= ~CLASS_MASK
& tabl_datum
;
227 if (datum_value
!= instr_nibl
)
231 if (!((~instr_nibl
) & 0x4))
235 if (!(instr_nibl
& 0x4))
239 if (!((~instr_nibl
) & 0x8))
243 if (!(instr_nibl
& 0x8))
247 if (!((~instr_nibl
) & 0x8))
252 if (!(instr_nibl
& 0x8))
261 if ((instr_nibl
| 0x2) != (datum_value
| 0x2))
279 output_instr (instr_data
, addr
, info
)
280 instr_data_s
*instr_data
;
281 unsigned long addr ATTRIBUTE_UNUSED
;
282 disassemble_info
*info
;
284 int loop
, loop_limit
;
288 strcpy (out_str
, "\t");
290 loop_limit
= (z8k_table
[instr_data
->tabl_index
].length
+ seg_length
) * 2;
291 FETCH_DATA (info
, loop_limit
);
292 for (loop
= 0; loop
< loop_limit
; loop
++)
294 sprintf (tmp_str
, "%x", instr_data
->nibbles
[loop
]);
295 strcat (out_str
, tmp_str
);
300 strcat (out_str
, " ");
303 strcat (out_str
, instr_data
->instr_asmsrc
);
305 (*info
->fprintf_func
) (info
->stream
, "%s", out_str
);
309 unpack_instr (instr_data
, is_segmented
, info
)
310 instr_data_s
*instr_data
;
312 disassemble_info
*info
;
314 int nibl_count
, loop
;
315 unsigned short instr_nibl
, instr_byte
, instr_word
;
317 unsigned int tabl_datum
, datum_class
;
318 unsigned short datum_value
;
323 while (z8k_table
[instr_data
->tabl_index
].byte_info
[loop
] != 0)
325 FETCH_DATA (info
, nibl_count
+ 4 - (nibl_count
% 4));
326 instr_nibl
= instr_data
->nibbles
[nibl_count
];
327 instr_byte
= instr_data
->bytes
[nibl_count
& ~1];
328 instr_word
= instr_data
->words
[nibl_count
& ~3];
330 tabl_datum
= z8k_table
[instr_data
->tabl_index
].byte_info
[loop
];
331 datum_class
= tabl_datum
& CLASS_MASK
;
332 datum_value
= tabl_datum
& ~CLASS_MASK
;
340 instr_data
->displacement
= instr_data
->insn_start
+ 4
341 + (signed short) (instr_word
& 0xffff);
345 if (instr_word
& 0x800)
347 /* neg. 12 bit displacement */
348 instr_data
->displacement
= instr_data
->insn_start
+ 2
349 - (signed short) ((instr_word
& 0xfff) | 0xf000) * 2;
353 instr_data
->displacement
= instr_data
->insn_start
+ 2
354 - (instr_word
& 0x0fff) * 2;
366 instr_data
->immediate
= instr_nibl
;
369 instr_data
->immediate
= (-instr_byte
);
373 instr_data
->immediate
= instr_byte
;
377 instr_data
->immediate
= instr_word
;
381 FETCH_DATA (info
, nibl_count
+ 8);
382 instr_long
= (instr_data
->words
[nibl_count
] << 16)
383 | (instr_data
->words
[nibl_count
+ 4]);
384 instr_data
->immediate
= instr_long
;
388 instr_data
->immediate
= instr_nibl
- 1;
391 instr_data
->immediate
= instr_nibl
+ 1;
394 instr_data
->immediate
= 1;
397 instr_data
->immediate
= 2;
400 instr_data
->immediate
= instr_nibl
& 0x3;
407 instr_data
->cond_code
= instr_nibl
;
412 if (instr_nibl
& 0x8)
414 FETCH_DATA (info
, nibl_count
+ 8);
415 instr_long
= (instr_data
->words
[nibl_count
] << 16)
416 | (instr_data
->words
[nibl_count
+ 4]);
417 instr_data
->address
= ((instr_word
& 0x7f00) << 8)
418 + (instr_long
& 0xffff);
424 instr_data
->address
= ((instr_word
& 0x7f00) << 8)
425 + (instr_word
& 0x00ff);
431 instr_data
->address
= instr_word
;
437 instr_data
->ctrl_code
= instr_nibl
& 0x7;
440 instr_data
->displacement
=
441 instr_data
->insn_start
+ 2 - (instr_byte
& 0x7f) * 2;
445 instr_data
->displacement
=
446 instr_data
->insn_start
+ 2 - (instr_byte
& 0x7f) * 2;
450 instr_data
->interrupts
= instr_nibl
& 0x3;
453 instr_data
->interrupts
= instr_nibl
& 0x3;
456 instr_data
->ctrl_code
= instr_nibl
& 0x7;
459 instr_data
->flags
= instr_nibl
;
462 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
465 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
468 instr_data
->displacement
=
469 instr_data
->insn_start
+ 2 + (signed char) instr_byte
* 2;
483 unparse_instr (instr_data
, is_segmented
)
484 instr_data_s
*instr_data
;
487 unsigned short datum_value
;
488 unsigned int tabl_datum
, datum_class
;
489 int loop
, loop_limit
;
490 char out_str
[80], tmp_str
[25];
492 sprintf (out_str
, "\t%s\t", z8k_table
[instr_data
->tabl_index
].name
);
494 loop_limit
= z8k_table
[instr_data
->tabl_index
].noperands
;
495 for (loop
= 0; loop
< loop_limit
; loop
++)
498 strcat (out_str
, ",");
500 tabl_datum
= z8k_table
[instr_data
->tabl_index
].arg_info
[loop
];
501 datum_class
= tabl_datum
& CLASS_MASK
;
502 datum_value
= tabl_datum
& ~CLASS_MASK
;
507 sprintf (tmp_str
, "0x%0lx(R%ld)", instr_data
->address
,
508 instr_data
->arg_reg
[datum_value
]);
509 strcat (out_str
, tmp_str
);
512 sprintf (tmp_str
, "r%ld(#%lx)", instr_data
->arg_reg
[datum_value
],
513 instr_data
->immediate
);
514 strcat (out_str
, tmp_str
);
517 sprintf (tmp_str
, "r%ld(R%ld)", instr_data
->arg_reg
[datum_value
],
518 instr_data
->arg_reg
[ARG_RX
]);
519 strcat (out_str
, tmp_str
);
522 sprintf (tmp_str
, "0x%0lx", instr_data
->displacement
);
523 strcat (out_str
, tmp_str
);
526 sprintf (tmp_str
, "#0x%0lx", instr_data
->immediate
);
527 strcat (out_str
, tmp_str
);
530 sprintf (tmp_str
, "%s", codes
[instr_data
->cond_code
]);
531 strcat (out_str
, tmp_str
);
534 sprintf (tmp_str
, "%s", ctrl_names
[instr_data
->ctrl_code
]);
535 strcat (out_str
, tmp_str
);
539 sprintf (tmp_str
, "0x%0lx", instr_data
->address
);
540 strcat (out_str
, tmp_str
);
544 sprintf (tmp_str
, "@rr%ld", instr_data
->arg_reg
[datum_value
]);
546 sprintf (tmp_str
, "@r%ld", instr_data
->arg_reg
[datum_value
]);
547 strcat (out_str
, tmp_str
);
550 sprintf (tmp_str
, "0x%0lx", instr_data
->flags
);
551 strcat (out_str
, tmp_str
);
554 if (instr_data
->arg_reg
[datum_value
] >= 0x8)
555 sprintf (tmp_str
, "rl%ld",
556 instr_data
->arg_reg
[datum_value
] - 0x8);
558 sprintf (tmp_str
, "rh%ld", instr_data
->arg_reg
[datum_value
]);
559 strcat (out_str
, tmp_str
);
562 sprintf (tmp_str
, "r%ld", instr_data
->arg_reg
[datum_value
]);
563 strcat (out_str
, tmp_str
);
566 sprintf (tmp_str
, "rq%ld", instr_data
->arg_reg
[datum_value
]);
567 strcat (out_str
, tmp_str
);
570 sprintf (tmp_str
, "rr%ld", instr_data
->arg_reg
[datum_value
]);
571 strcat (out_str
, tmp_str
);
575 sprintf (tmp_str
, "rr%ld", instr_data
->arg_reg
[datum_value
]);
577 sprintf (tmp_str
, "r%ld", instr_data
->arg_reg
[datum_value
]);
578 strcat (out_str
, tmp_str
);
586 strcpy (instr_data
->instr_asmsrc
, out_str
);
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