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 /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
54 to ADDR (exclusive) are valid. Returns 1 for success, longjmps
56 #define FETCH_DATA(info, nibble) \
57 ((nibble) < ((instr_data_s *) (info->private_data))->max_fetched \
58 ? 1 : fetch_data ((info), (nibble)))
61 fetch_data (info
, nibble
)
62 struct disassemble_info
*info
;
65 unsigned char mybuf
[20];
67 instr_data_s
*priv
= (instr_data_s
*) info
->private_data
;
69 if ((nibble
% 4) != 0)
72 status
= (*info
->read_memory_func
) (priv
->insn_start
,
78 (*info
->memory_error_func
) (status
, priv
->insn_start
, info
);
79 longjmp (priv
->bailout
, 1);
84 unsigned char *p
= mybuf
;
86 for (i
= 0; i
< nibble
;)
88 priv
->words
[i
] = (p
[0] << 8) | p
[1];
91 priv
->nibbles
[i
++] = *p
>> 4;
92 priv
->nibbles
[i
++] = *p
& 0xf;
96 priv
->nibbles
[i
++] = *p
>> 4;
97 priv
->nibbles
[i
++] = *p
& 0xf;
102 priv
->max_fetched
= nibble
;
106 static char *codes
[16] = {
125 static char *ctrl_names
[8] = {
136 static int seg_length
;
137 int z8k_lookup_instr
PARAMS ((unsigned char *, disassemble_info
*));
138 static void output_instr
139 PARAMS ((instr_data_s
*, unsigned long, disassemble_info
*));
140 static void unpack_instr
PARAMS ((instr_data_s
*, int, disassemble_info
*));
141 static void unparse_instr
PARAMS ((instr_data_s
*, int));
144 print_insn_z8k (addr
, info
, is_segmented
)
146 disassemble_info
*info
;
149 instr_data_s instr_data
;
151 info
->private_data
= (PTR
) &instr_data
;
152 instr_data
.max_fetched
= 0;
153 instr_data
.insn_start
= addr
;
154 if (setjmp (instr_data
.bailout
) != 0)
158 instr_data
.tabl_index
= z8k_lookup_instr (instr_data
.nibbles
, info
);
159 if (instr_data
.tabl_index
> 0)
161 unpack_instr (&instr_data
, is_segmented
, info
);
162 unparse_instr (&instr_data
, is_segmented
);
163 output_instr (&instr_data
, addr
, info
);
164 return z8k_table
[instr_data
.tabl_index
].length
+ seg_length
;
168 FETCH_DATA (info
, 4);
169 (*info
->fprintf_func
) (info
->stream
, ".word %02x%02x",
170 instr_data
.bytes
[0], instr_data
.bytes
[2]);
176 print_insn_z8001 (addr
, info
)
178 disassemble_info
*info
;
180 return print_insn_z8k (addr
, info
, 1);
184 print_insn_z8002 (addr
, info
)
186 disassemble_info
*info
;
188 return print_insn_z8k (addr
, info
, 0);
192 z8k_lookup_instr (nibbles
, info
)
193 unsigned char *nibbles
;
194 disassemble_info
*info
;
197 int nibl_index
, tabl_index
;
199 unsigned short instr_nibl
;
200 unsigned short tabl_datum
, datum_class
, datum_value
;
204 while (!nibl_matched
&& z8k_table
[tabl_index
].name
)
208 nibl_index
< z8k_table
[tabl_index
].length
* 2 && nibl_matched
;
211 if ((nibl_index
% 4) == 0)
212 /* Fetch one word at a time. */
213 FETCH_DATA (info
, nibl_index
+ 4);
214 instr_nibl
= nibbles
[nibl_index
];
216 tabl_datum
= z8k_table
[tabl_index
].byte_info
[nibl_index
];
217 datum_class
= tabl_datum
& CLASS_MASK
;
218 datum_value
= ~CLASS_MASK
& tabl_datum
;
223 if (datum_value
!= instr_nibl
)
227 if (!((~instr_nibl
) & 0x4))
231 if (!(instr_nibl
& 0x4))
235 if (!((~instr_nibl
) & 0x8))
239 if (!(instr_nibl
& 0x8))
243 if (!((~instr_nibl
) & 0x8))
248 if (!(instr_nibl
& 0x8))
257 if ((instr_nibl
| 0x2) != (datum_value
| 0x2))
275 output_instr (instr_data
, addr
, info
)
276 instr_data_s
*instr_data
;
278 disassemble_info
*info
;
280 int loop
, loop_limit
;
284 strcpy (out_str
, "\t");
286 loop_limit
= (z8k_table
[instr_data
->tabl_index
].length
+ seg_length
) * 2;
287 FETCH_DATA (info
, loop_limit
);
288 for (loop
= 0; loop
< loop_limit
; loop
++)
290 sprintf (tmp_str
, "%x", instr_data
->nibbles
[loop
]);
291 strcat (out_str
, tmp_str
);
296 strcat (out_str
, " ");
299 strcat (out_str
, instr_data
->instr_asmsrc
);
301 (*info
->fprintf_func
) (info
->stream
, "%s", out_str
);
305 unpack_instr (instr_data
, is_segmented
, info
)
306 instr_data_s
*instr_data
;
308 disassemble_info
*info
;
310 int nibl_count
, loop
;
311 unsigned short instr_nibl
, instr_byte
, instr_word
;
313 unsigned int tabl_datum
, datum_class
;
314 unsigned short datum_value
;
319 while (z8k_table
[instr_data
->tabl_index
].byte_info
[loop
] != 0)
321 FETCH_DATA (info
, nibl_count
+ 4 - (nibl_count
% 4));
322 instr_nibl
= instr_data
->nibbles
[nibl_count
];
323 instr_byte
= instr_data
->bytes
[nibl_count
& ~1];
324 instr_word
= instr_data
->words
[nibl_count
& ~3];
326 tabl_datum
= z8k_table
[instr_data
->tabl_index
].byte_info
[loop
];
327 datum_class
= tabl_datum
& CLASS_MASK
;
328 datum_value
= tabl_datum
& ~CLASS_MASK
;
336 instr_data
->displacement
= instr_data
->insn_start
+ 4
337 + (signed short) (instr_word
& 0xffff);
341 if (instr_word
& 0x800)
343 /* neg. 12 bit displacement */
344 instr_data
->displacement
= instr_data
->insn_start
+ 2
345 - (signed short) ((instr_word
& 0xfff) | 0xf000) * 2;
349 instr_data
->displacement
= instr_data
->insn_start
+ 2
350 - (instr_word
& 0x0fff) * 2;
362 instr_data
->immediate
= instr_nibl
;
365 instr_data
->immediate
= (-instr_byte
);
369 instr_data
->immediate
= instr_byte
;
373 instr_data
->immediate
= instr_word
;
377 FETCH_DATA (info
, nibl_count
+ 8);
378 instr_long
= (instr_data
->words
[nibl_count
] << 16)
379 | (instr_data
->words
[nibl_count
+ 4]);
380 instr_data
->immediate
= instr_long
;
384 instr_data
->immediate
= instr_nibl
- 1;
387 instr_data
->immediate
= instr_nibl
+ 1;
390 instr_data
->immediate
= 1;
393 instr_data
->immediate
= 2;
396 instr_data
->immediate
= instr_nibl
& 0x3;
403 instr_data
->cond_code
= instr_nibl
;
408 if (instr_nibl
& 0x8)
410 FETCH_DATA (info
, nibl_count
+ 8);
411 instr_long
= (instr_data
->words
[nibl_count
] << 16)
412 | (instr_data
->words
[nibl_count
+ 4]);
413 instr_data
->address
= ((instr_word
& 0x7f00) << 8)
414 + (instr_long
& 0xffff);
420 instr_data
->address
= ((instr_word
& 0x7f00) << 8)
421 + (instr_word
& 0x00ff);
427 instr_data
->address
= instr_word
;
433 instr_data
->ctrl_code
= instr_nibl
& 0x7;
436 instr_data
->displacement
=
437 instr_data
->insn_start
+ 2 - (instr_byte
& 0x7f) * 2;
441 instr_data
->displacement
=
442 instr_data
->insn_start
+ 2 - (instr_byte
& 0x7f) * 2;
446 instr_data
->interrupts
= instr_nibl
& 0x3;
449 instr_data
->interrupts
= instr_nibl
& 0x3;
452 instr_data
->ctrl_code
= instr_nibl
& 0x7;
455 instr_data
->flags
= instr_nibl
;
458 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
461 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
464 instr_data
->displacement
=
465 instr_data
->insn_start
+ 2 + (signed char) instr_byte
* 2;
479 unparse_instr (instr_data
, is_segmented
)
480 instr_data_s
*instr_data
;
483 unsigned short datum_value
;
484 unsigned int tabl_datum
, datum_class
;
485 int loop
, loop_limit
;
486 char out_str
[80], tmp_str
[25];
488 sprintf (out_str
, "\t%s\t", z8k_table
[instr_data
->tabl_index
].name
);
490 loop_limit
= z8k_table
[instr_data
->tabl_index
].noperands
;
491 for (loop
= 0; loop
< loop_limit
; loop
++)
494 strcat (out_str
, ",");
496 tabl_datum
= z8k_table
[instr_data
->tabl_index
].arg_info
[loop
];
497 datum_class
= tabl_datum
& CLASS_MASK
;
498 datum_value
= tabl_datum
& ~CLASS_MASK
;
503 sprintf (tmp_str
, "0x%0lx(R%ld)", instr_data
->address
,
504 instr_data
->arg_reg
[datum_value
]);
505 strcat (out_str
, tmp_str
);
508 sprintf (tmp_str
, "r%ld(#%lx)", instr_data
->arg_reg
[datum_value
],
509 instr_data
->immediate
);
510 strcat (out_str
, tmp_str
);
513 sprintf (tmp_str
, "r%ld(R%ld)", instr_data
->arg_reg
[datum_value
],
514 instr_data
->arg_reg
[ARG_RX
]);
515 strcat (out_str
, tmp_str
);
518 sprintf (tmp_str
, "0x%0lx", instr_data
->displacement
);
519 strcat (out_str
, tmp_str
);
522 sprintf (tmp_str
, "#0x%0lx", instr_data
->immediate
);
523 strcat (out_str
, tmp_str
);
526 sprintf (tmp_str
, "%s", codes
[instr_data
->cond_code
]);
527 strcat (out_str
, tmp_str
);
530 sprintf (tmp_str
, "%s", ctrl_names
[instr_data
->ctrl_code
]);
531 strcat (out_str
, tmp_str
);
535 sprintf (tmp_str
, "0x%0lx", instr_data
->address
);
536 strcat (out_str
, tmp_str
);
539 sprintf (tmp_str
, "@R%ld", instr_data
->arg_reg
[datum_value
]);
540 strcat (out_str
, tmp_str
);
543 sprintf (tmp_str
, "0x%0lx", instr_data
->flags
);
544 strcat (out_str
, tmp_str
);
547 if (instr_data
->arg_reg
[datum_value
] >= 0x8)
549 sprintf (tmp_str
, "rl%ld",
550 instr_data
->arg_reg
[datum_value
] - 0x8);
554 sprintf (tmp_str
, "rh%ld", instr_data
->arg_reg
[datum_value
]);
556 strcat (out_str
, tmp_str
);
559 sprintf (tmp_str
, "r%ld", instr_data
->arg_reg
[datum_value
]);
560 strcat (out_str
, tmp_str
);
563 sprintf (tmp_str
, "rq%ld", instr_data
->arg_reg
[datum_value
]);
564 strcat (out_str
, tmp_str
);
567 sprintf (tmp_str
, "rr%ld", instr_data
->arg_reg
[datum_value
]);
568 strcat (out_str
, tmp_str
);
572 sprintf (tmp_str
, "rr%ld", instr_data
->arg_reg
[datum_value
]);
574 sprintf (tmp_str
, "r%ld", instr_data
->arg_reg
[datum_value
]);
575 strcat (out_str
, tmp_str
);
583 strcpy (instr_data
->instr_asmsrc
, out_str
);