1 /* Disassemble z8000 code.
2 Copyright 1992, 1993, 1995, 1998, 2000
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. */
31 /* These are all indexed by nibble number (i.e only every other entry
32 of bytes is used, and every 4th entry of words). */
33 unsigned char nibbles
[24];
34 unsigned char bytes
[24];
35 unsigned short words
[24];
37 /* Nibble number of first word not yet fetched. */
43 char instr_asmsrc
[80];
44 unsigned long arg_reg
[0x0f];
45 unsigned long immediate
;
46 unsigned long displacement
;
47 unsigned long address
;
48 unsigned long cond_code
;
49 unsigned long ctrl_code
;
51 unsigned long interrupts
;
55 /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
56 to ADDR (exclusive) are valid. Returns 1 for success, longjmps
58 #define FETCH_DATA(info, nibble) \
59 ((nibble) < ((instr_data_s *)(info->private_data))->max_fetched \
60 ? 1 : fetch_data ((info), (nibble)))
63 fetch_data (info
, nibble
)
64 struct disassemble_info
*info
;
67 unsigned char mybuf
[20];
69 instr_data_s
*priv
= (instr_data_s
*) info
->private_data
;
71 if ((nibble
% 4) != 0)
74 status
= (*info
->read_memory_func
) (priv
->insn_start
,
80 (*info
->memory_error_func
) (status
, priv
->insn_start
, info
);
81 longjmp (priv
->bailout
, 1);
86 unsigned char *p
= mybuf
;
88 for (i
= 0; i
< nibble
;)
90 priv
->words
[i
] = (p
[0] << 8) | p
[1];
93 priv
->nibbles
[i
++] = *p
>> 4;
94 priv
->nibbles
[i
++] = *p
& 0xf;
98 priv
->nibbles
[i
++] = *p
>> 4;
99 priv
->nibbles
[i
++] = *p
& 0xf;
104 priv
->max_fetched
= nibble
;
108 static char *codes
[16] =
128 int z8k_lookup_instr
PARAMS ((unsigned char *, disassemble_info
*));
129 static void output_instr
130 PARAMS ((instr_data_s
*, unsigned long, disassemble_info
*));
131 static void unpack_instr
PARAMS ((instr_data_s
*, int, disassemble_info
*));
132 static void unparse_instr
PARAMS ((instr_data_s
*));
135 print_insn_z8k (addr
, info
, is_segmented
)
137 disassemble_info
*info
;
140 instr_data_s instr_data
;
142 info
->private_data
= (PTR
) &instr_data
;
143 instr_data
.max_fetched
= 0;
144 instr_data
.insn_start
= addr
;
145 if (setjmp (instr_data
.bailout
) != 0)
149 instr_data
.tabl_index
= z8k_lookup_instr (instr_data
.nibbles
, info
);
150 if (instr_data
.tabl_index
> 0)
152 unpack_instr (&instr_data
, is_segmented
, info
);
153 unparse_instr (&instr_data
);
154 output_instr (&instr_data
, addr
, info
);
155 return z8k_table
[instr_data
.tabl_index
].length
;
159 FETCH_DATA (info
, 4);
160 (*info
->fprintf_func
) (info
->stream
, ".word %02x%02x",
161 instr_data
.bytes
[0], instr_data
.bytes
[2]);
167 print_insn_z8001 (addr
, info
)
169 disassemble_info
*info
;
171 return print_insn_z8k (addr
, info
, 1);
175 print_insn_z8002 (addr
, info
)
177 disassemble_info
*info
;
179 return print_insn_z8k (addr
, info
, 0);
183 z8k_lookup_instr (nibbles
, info
)
184 unsigned char *nibbles
;
185 disassemble_info
*info
;
188 int nibl_index
, tabl_index
;
190 unsigned short instr_nibl
;
191 unsigned short tabl_datum
, datum_class
, datum_value
;
195 while (!nibl_matched
&& z8k_table
[tabl_index
].name
)
199 nibl_index
< z8k_table
[tabl_index
].length
* 2 && nibl_matched
;
202 if ((nibl_index
% 4) == 0)
203 /* Fetch one word at a time. */
204 FETCH_DATA (info
, nibl_index
+ 4);
205 instr_nibl
= nibbles
[nibl_index
];
207 tabl_datum
= z8k_table
[tabl_index
].byte_info
[nibl_index
];
208 datum_class
= tabl_datum
& CLASS_MASK
;
209 datum_value
= ~CLASS_MASK
& tabl_datum
;
214 if (datum_value
!= instr_nibl
)
218 if (!((~instr_nibl
) & 0x4))
222 if (!(instr_nibl
& 0x4))
226 if (!((~instr_nibl
) & 0x8))
230 if (!(instr_nibl
& 0x8))
234 if (!((~instr_nibl
) & 0x8))
239 if (!(instr_nibl
& 0x8))
248 if ((instr_nibl
| 0x2) != (datum_value
| 0x2))
267 output_instr (instr_data
, addr
, info
)
268 instr_data_s
*instr_data
;
270 disassemble_info
*info
;
272 int loop
, loop_limit
;
276 strcpy (out_str
, "\t");
278 loop_limit
= z8k_table
[instr_data
->tabl_index
].length
* 2;
279 FETCH_DATA (info
, loop_limit
);
280 for (loop
= 0; loop
< loop_limit
; loop
++)
282 sprintf (tmp_str
, "%x", instr_data
->nibbles
[loop
]);
283 strcat (out_str
, tmp_str
);
288 strcat (out_str
, " ");
291 strcat (out_str
, instr_data
->instr_asmsrc
);
293 (*info
->fprintf_func
) (info
->stream
, "%s", out_str
);
297 unpack_instr (instr_data
, is_segmented
, info
)
298 instr_data_s
*instr_data
;
300 disassemble_info
*info
;
302 int nibl_count
, loop
;
303 unsigned short instr_nibl
, instr_byte
, instr_word
;
305 unsigned short tabl_datum
, datum_class
, datum_value
;
309 while (z8k_table
[instr_data
->tabl_index
].byte_info
[loop
] != 0)
311 FETCH_DATA (info
, nibl_count
+ 4 - (nibl_count
% 4));
312 instr_nibl
= instr_data
->nibbles
[nibl_count
];
313 instr_byte
= instr_data
->bytes
[nibl_count
];
314 instr_word
= instr_data
->words
[nibl_count
];
316 tabl_datum
= z8k_table
[instr_data
->tabl_index
].byte_info
[loop
];
317 datum_class
= tabl_datum
& CLASS_MASK
;
318 datum_value
= tabl_datum
& ~CLASS_MASK
;
323 instr_data
->address
= instr_nibl
;
326 instr_data
->displacement
= instr_nibl
;
329 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
335 instr_data
->displacement
= instr_word
;
339 instr_data
->displacement
= instr_word
& 0x0fff;
350 instr_data
->immediate
= instr_nibl
;
353 instr_data
->immediate
= (-instr_byte
);
357 instr_data
->immediate
= instr_byte
;
361 instr_data
->immediate
= instr_word
;
365 FETCH_DATA (info
, nibl_count
+ 8);
366 instr_long
= (instr_data
->words
[nibl_count
] << 16)
367 | (instr_data
->words
[nibl_count
+ 4]);
368 instr_data
->immediate
= instr_long
;
372 instr_data
->immediate
= instr_nibl
- 1;
375 instr_data
->immediate
= instr_nibl
+ 1;
378 instr_data
->immediate
= 1;
381 instr_data
->immediate
= 2;
384 instr_data
->immediate
= instr_nibl
& 0x3;
391 instr_data
->cond_code
= instr_nibl
;
394 instr_data
->ctrl_code
= instr_nibl
;
400 if (instr_nibl
& 0x8)
402 FETCH_DATA (info
, nibl_count
+ 8);
403 instr_long
= (instr_data
->words
[nibl_count
] << 16)
404 | (instr_data
->words
[nibl_count
+ 4]);
405 instr_data
->address
= ((instr_word
& 0x7f00) << 8) +
406 (instr_long
& 0xffff);
411 instr_data
->address
= ((instr_word
& 0x7f00) << 8) +
412 (instr_word
& 0x00ff);
418 instr_data
->address
= instr_word
;
423 instr_data
->cond_code
= instr_nibl
& 0x7;
426 instr_data
->cond_code
= instr_nibl
& 0x7;
429 instr_data
->displacement
= instr_byte
& 0x7f;
433 instr_data
->displacement
= instr_byte
& 0x7f;
437 instr_data
->interrupts
= instr_nibl
& 0x3;
440 instr_data
->interrupts
= instr_nibl
& 0x3;
446 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
449 instr_data
->flags
= instr_nibl
;
452 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
455 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
458 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
461 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
464 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
467 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
479 unparse_instr (instr_data
)
480 instr_data_s
*instr_data
;
482 unsigned short tabl_datum
, datum_class
, datum_value
;
483 int loop
, loop_limit
;
484 char out_str
[80], tmp_str
[25];
486 sprintf (out_str
, "\t%s\t", z8k_table
[instr_data
->tabl_index
].name
);
488 loop_limit
= z8k_table
[instr_data
->tabl_index
].noperands
;
489 for (loop
= 0; loop
< loop_limit
; loop
++)
492 strcat (out_str
, ",");
494 tabl_datum
= z8k_table
[instr_data
->tabl_index
].arg_info
[loop
];
495 datum_class
= tabl_datum
& CLASS_MASK
;
496 datum_value
= tabl_datum
& ~CLASS_MASK
;
501 sprintf (tmp_str
, "0x%0lx(R%ld)", instr_data
->address
,
502 instr_data
->arg_reg
[datum_value
]);
503 strcat (out_str
, tmp_str
);
506 sprintf (tmp_str
, "r%ld(#%lx)", instr_data
->arg_reg
[datum_value
],
507 instr_data
->immediate
);
508 strcat (out_str
, tmp_str
);
511 sprintf (tmp_str
, "r%ld(R%ld)", instr_data
->arg_reg
[datum_value
],
512 instr_data
->arg_reg
[ARG_RX
]);
513 strcat (out_str
, tmp_str
);
516 sprintf (tmp_str
, "#0x%0lx", instr_data
->displacement
);
517 strcat (out_str
, tmp_str
);
520 sprintf (tmp_str
, "#0x%0lx", instr_data
->immediate
);
521 strcat (out_str
, tmp_str
);
524 sprintf (tmp_str
, "%s", codes
[instr_data
->cond_code
]);
525 strcat (out_str
, tmp_str
);
528 sprintf (tmp_str
, "0x%0lx", instr_data
->ctrl_code
);
529 strcat (out_str
, tmp_str
);
533 sprintf (tmp_str
, "#0x%0lx", instr_data
->address
);
534 strcat (out_str
, tmp_str
);
537 sprintf (tmp_str
, "@R%ld", instr_data
->arg_reg
[datum_value
]);
538 strcat (out_str
, tmp_str
);
541 sprintf (tmp_str
, "0x%0lx", instr_data
->flags
);
542 strcat (out_str
, tmp_str
);
545 if (instr_data
->arg_reg
[datum_value
] >= 0x8)
547 sprintf (tmp_str
, "rl%ld",
548 instr_data
->arg_reg
[datum_value
] - 0x8);
552 sprintf (tmp_str
, "rh%ld", instr_data
->arg_reg
[datum_value
]);
554 strcat (out_str
, tmp_str
);
557 sprintf (tmp_str
, "r%ld", instr_data
->arg_reg
[datum_value
]);
558 strcat (out_str
, tmp_str
);
561 sprintf (tmp_str
, "rq%ld", instr_data
->arg_reg
[datum_value
]);
562 strcat (out_str
, tmp_str
);
565 sprintf (tmp_str
, "rr%ld", instr_data
->arg_reg
[datum_value
]);
566 strcat (out_str
, tmp_str
);
573 strcpy (instr_data
->instr_asmsrc
, out_str
);
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