1 /* Disassemble z8000 code.
2 Copyright 1992, 1993, 1998, 2000, 2001, 2002, 2003, 2005, 2007
3 Free Software Foundation, Inc.
5 This file is part of the GNU opcodes library.
7 This library 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 3, or (at your option)
12 It is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this file; see the file COPYING. If not, write to the
19 Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
32 /* These are all indexed by nibble number (i.e only every other entry
33 of bytes is used, and every 4th entry of words). */
34 unsigned char nibbles
[24];
35 unsigned char bytes
[24];
36 unsigned short words
[24];
38 /* Nibble number of first word not yet fetched. */
44 char instr_asmsrc
[80];
45 unsigned long arg_reg
[0x0f];
46 unsigned long immediate
;
47 unsigned long displacement
;
48 unsigned long address
;
49 unsigned long cond_code
;
50 unsigned long ctrl_code
;
52 unsigned long interrupts
;
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 (struct disassemble_info
*info
, int nibble
)
66 unsigned char mybuf
[20];
68 instr_data_s
*priv
= (instr_data_s
*) info
->private_data
;
70 if ((nibble
% 4) != 0)
73 status
= (*info
->read_memory_func
) (priv
->insn_start
,
79 (*info
->memory_error_func
) (status
, priv
->insn_start
, info
);
80 longjmp (priv
->bailout
, 1);
85 unsigned char *p
= mybuf
;
87 for (i
= 0; i
< nibble
;)
89 priv
->words
[i
] = (p
[0] << 8) | p
[1];
92 priv
->nibbles
[i
++] = *p
>> 4;
93 priv
->nibbles
[i
++] = *p
& 0xf;
97 priv
->nibbles
[i
++] = *p
>> 4;
98 priv
->nibbles
[i
++] = *p
& 0xf;
103 priv
->max_fetched
= nibble
;
107 static char *codes
[16] =
127 static char *ctrl_names
[8] =
139 static int seg_length
;
140 int z8k_lookup_instr (unsigned char *, disassemble_info
*);
141 static void output_instr (instr_data_s
*, unsigned long, disassemble_info
*);
142 static void unpack_instr (instr_data_s
*, int, disassemble_info
*);
143 static void unparse_instr (instr_data_s
*, int);
146 print_insn_z8k (bfd_vma addr
, disassemble_info
*info
, int is_segmented
)
148 instr_data_s instr_data
;
150 info
->private_data
= (PTR
) &instr_data
;
151 instr_data
.max_fetched
= 0;
152 instr_data
.insn_start
= addr
;
153 if (setjmp (instr_data
.bailout
) != 0)
157 info
->bytes_per_chunk
= 2;
158 info
->bytes_per_line
= 6;
159 info
->display_endian
= BFD_ENDIAN_BIG
;
161 instr_data
.tabl_index
= z8k_lookup_instr (instr_data
.nibbles
, info
);
162 if (instr_data
.tabl_index
>= 0)
164 unpack_instr (&instr_data
, is_segmented
, info
);
165 unparse_instr (&instr_data
, is_segmented
);
166 output_instr (&instr_data
, addr
, info
);
167 return z8k_table
[instr_data
.tabl_index
].length
+ seg_length
;
171 FETCH_DATA (info
, 4);
172 (*info
->fprintf_func
) (info
->stream
, ".word %02x%02x",
173 instr_data
.bytes
[0], instr_data
.bytes
[2]);
179 print_insn_z8001 (bfd_vma addr
, disassemble_info
*info
)
181 return print_insn_z8k (addr
, info
, 1);
185 print_insn_z8002 (bfd_vma addr
, disassemble_info
*info
)
187 return print_insn_z8k (addr
, info
, 0);
191 z8k_lookup_instr (unsigned char *nibbles
, disassemble_info
*info
)
193 int nibl_index
, tabl_index
;
196 unsigned short instr_nibl
;
197 unsigned short tabl_datum
, datum_class
, datum_value
;
201 FETCH_DATA (info
, 4);
202 while (!nibl_matched
&& z8k_table
[tabl_index
].name
)
206 nibl_index
< z8k_table
[tabl_index
].length
* 2 && nibl_matched
;
209 if ((nibl_index
% 4) == 0)
211 /* Fetch data only if it isn't already there. */
212 if (nibl_index
>= 4 || (nibl_index
< 4 && need_fetch
))
213 FETCH_DATA (info
, nibl_index
+ 4); /* Fetch one word at a time. */
219 instr_nibl
= nibbles
[nibl_index
];
221 tabl_datum
= z8k_table
[tabl_index
].byte_info
[nibl_index
];
222 datum_class
= tabl_datum
& CLASS_MASK
;
223 datum_value
= ~CLASS_MASK
& tabl_datum
;
228 if (datum_value
!= instr_nibl
)
234 if (!((~instr_nibl
) & 0x4))
238 if (!(instr_nibl
& 0x4))
242 if (!((~instr_nibl
) & 0x8))
246 if (!(instr_nibl
& 0x8))
250 if (!((~instr_nibl
) & 0x8))
255 if (!(instr_nibl
& 0x8))
264 if ((instr_nibl
| 0x2) != (datum_value
| 0x2))
281 output_instr (instr_data_s
*instr_data
,
282 unsigned long addr ATTRIBUTE_UNUSED
,
283 disassemble_info
*info
)
290 num_bytes
= (z8k_table
[instr_data
->tabl_index
].length
+ seg_length
) * 2;
291 FETCH_DATA (info
, num_bytes
);
293 strcat (out_str
, instr_data
->instr_asmsrc
);
295 (*info
->fprintf_func
) (info
->stream
, "%s", out_str
);
299 unpack_instr (instr_data_s
*instr_data
, int is_segmented
, disassemble_info
*info
)
301 int nibl_count
, loop
;
302 unsigned short instr_nibl
, instr_byte
, instr_word
;
304 unsigned int tabl_datum
, datum_class
;
305 unsigned short datum_value
;
311 while (z8k_table
[instr_data
->tabl_index
].byte_info
[loop
] != 0)
313 FETCH_DATA (info
, nibl_count
+ 4 - (nibl_count
% 4));
314 instr_nibl
= instr_data
->nibbles
[nibl_count
];
315 instr_byte
= instr_data
->bytes
[nibl_count
& ~1];
316 instr_word
= instr_data
->words
[nibl_count
& ~3];
318 tabl_datum
= z8k_table
[instr_data
->tabl_index
].byte_info
[loop
];
319 datum_class
= tabl_datum
& CLASS_MASK
;
320 datum_value
= tabl_datum
& ~CLASS_MASK
;
328 instr_data
->displacement
= instr_data
->insn_start
+ 4
329 + (signed short) (instr_word
& 0xffff);
333 if (instr_word
& 0x800)
334 /* Negative 12 bit displacement. */
335 instr_data
->displacement
= instr_data
->insn_start
+ 2
336 - (signed short) ((instr_word
& 0xfff) | 0xf000) * 2;
338 instr_data
->displacement
= instr_data
->insn_start
+ 2
339 - (instr_word
& 0x0fff) * 2;
351 instr_data
->immediate
= instr_nibl
;
354 instr_data
->immediate
= (- instr_nibl
) & 0xf;
357 instr_data
->immediate
= (- instr_byte
) & 0xff;
361 instr_data
->immediate
= instr_byte
;
365 instr_data
->immediate
= instr_word
;
369 FETCH_DATA (info
, nibl_count
+ 8);
370 instr_long
= (instr_data
->words
[nibl_count
] << 16)
371 | (instr_data
->words
[nibl_count
+ 4]);
372 instr_data
->immediate
= instr_long
;
376 instr_data
->immediate
= instr_nibl
- 1;
379 instr_data
->immediate
= instr_nibl
+ 1;
382 instr_data
->immediate
= 1;
385 instr_data
->immediate
= 2;
388 instr_data
->immediate
= instr_nibl
& 0x3;
395 instr_data
->cond_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) << 16)
406 + (instr_long
& 0xffff);
412 instr_data
->address
= ((instr_word
& 0x7f00) << 16)
413 + (instr_word
& 0x00ff);
419 instr_data
->address
= instr_word
;
425 instr_data
->ctrl_code
= instr_nibl
& 0x7;
428 instr_data
->displacement
=
429 instr_data
->insn_start
+ 2 - (instr_byte
& 0x7f) * 2;
433 instr_data
->displacement
=
434 instr_data
->insn_start
+ 2 - (instr_byte
& 0x7f) * 2;
438 instr_data
->interrupts
= instr_nibl
& 0x3;
441 instr_data
->interrupts
= instr_nibl
& 0x3;
445 instr_data
->ctrl_code
= instr_nibl
& 0x7;
448 instr_data
->flags
= instr_nibl
;
451 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
454 instr_data
->arg_reg
[datum_value
] = instr_nibl
;
457 instr_data
->displacement
=
458 instr_data
->insn_start
+ 2 + (signed char) instr_byte
* 2;
462 instr_data
->immediate
= ((instr_nibl
>> 1) & 0x1) + 1;
476 print_intr(char *tmp_str
, unsigned long interrupts
)
481 if (! (interrupts
& 2))
483 strcat (tmp_str
, "vi");
486 if (! (interrupts
& 1))
488 if (comma
) strcat (tmp_str
, ",");
489 strcat (tmp_str
, "nvi");
494 print_flags(char *tmp_str
, unsigned long flags
)
501 strcat (tmp_str
, "c");
506 if (comma
) strcat (tmp_str
, ",");
507 strcat (tmp_str
, "z");
512 if (comma
) strcat (tmp_str
, ",");
513 strcat (tmp_str
, "s");
518 if (comma
) strcat (tmp_str
, ",");
519 strcat (tmp_str
, "p");
524 unparse_instr (instr_data_s
*instr_data
, int is_segmented
)
526 unsigned short datum_value
;
527 unsigned int tabl_datum
, datum_class
;
528 int loop
, loop_limit
;
529 char out_str
[80], tmp_str
[25];
531 sprintf (out_str
, "%s\t", z8k_table
[instr_data
->tabl_index
].name
);
533 loop_limit
= z8k_table
[instr_data
->tabl_index
].noperands
;
534 for (loop
= 0; loop
< loop_limit
; loop
++)
537 strcat (out_str
, ",");
539 tabl_datum
= z8k_table
[instr_data
->tabl_index
].arg_info
[loop
];
540 datum_class
= tabl_datum
& CLASS_MASK
;
541 datum_value
= tabl_datum
& ~CLASS_MASK
;
546 sprintf (tmp_str
, "0x%0lx(r%ld)", instr_data
->address
,
547 instr_data
->arg_reg
[datum_value
]);
548 strcat (out_str
, tmp_str
);
552 sprintf (tmp_str
, "rr%ld(#0x%lx)", instr_data
->arg_reg
[datum_value
],
553 instr_data
->immediate
);
555 sprintf (tmp_str
, "r%ld(#0x%lx)", instr_data
->arg_reg
[datum_value
],
556 instr_data
->immediate
);
557 strcat (out_str
, tmp_str
);
561 sprintf (tmp_str
, "rr%ld(r%ld)", instr_data
->arg_reg
[datum_value
],
562 instr_data
->arg_reg
[ARG_RX
]);
564 sprintf (tmp_str
, "r%ld(r%ld)", instr_data
->arg_reg
[datum_value
],
565 instr_data
->arg_reg
[ARG_RX
]);
566 strcat (out_str
, tmp_str
);
569 sprintf (tmp_str
, "0x%0lx", instr_data
->displacement
);
570 strcat (out_str
, tmp_str
);
573 if (datum_value
== ARG_IMM2
) /* True with EI/DI instructions only. */
575 print_intr (tmp_str
, instr_data
->interrupts
);
576 strcat (out_str
, tmp_str
);
579 sprintf (tmp_str
, "#0x%0lx", instr_data
->immediate
);
580 strcat (out_str
, tmp_str
);
583 sprintf (tmp_str
, "%s", codes
[instr_data
->cond_code
]);
584 strcat (out_str
, tmp_str
);
587 sprintf (tmp_str
, "%s", ctrl_names
[instr_data
->ctrl_code
]);
588 strcat (out_str
, tmp_str
);
592 sprintf (tmp_str
, "0x%0lx", instr_data
->address
);
593 strcat (out_str
, tmp_str
);
597 sprintf (tmp_str
, "@rr%ld", instr_data
->arg_reg
[datum_value
]);
599 sprintf (tmp_str
, "@r%ld", instr_data
->arg_reg
[datum_value
]);
600 strcat (out_str
, tmp_str
);
603 sprintf (tmp_str
, "@r%ld", instr_data
->arg_reg
[datum_value
]);
604 strcat (out_str
, tmp_str
);
607 print_flags(tmp_str
, instr_data
->flags
);
608 strcat (out_str
, tmp_str
);
611 if (instr_data
->arg_reg
[datum_value
] >= 0x8)
612 sprintf (tmp_str
, "rl%ld",
613 instr_data
->arg_reg
[datum_value
] - 0x8);
615 sprintf (tmp_str
, "rh%ld", instr_data
->arg_reg
[datum_value
]);
616 strcat (out_str
, tmp_str
);
619 sprintf (tmp_str
, "r%ld", instr_data
->arg_reg
[datum_value
]);
620 strcat (out_str
, tmp_str
);
623 sprintf (tmp_str
, "rq%ld", instr_data
->arg_reg
[datum_value
]);
624 strcat (out_str
, tmp_str
);
627 sprintf (tmp_str
, "rr%ld", instr_data
->arg_reg
[datum_value
]);
628 strcat (out_str
, tmp_str
);
632 sprintf (tmp_str
, "rr%ld", instr_data
->arg_reg
[datum_value
]);
634 sprintf (tmp_str
, "r%ld", instr_data
->arg_reg
[datum_value
]);
635 strcat (out_str
, tmp_str
);
643 strcpy (instr_data
->instr_asmsrc
, out_str
);
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