1 /* Disassemble z8000 code.
2 Copyright 1992, 1993, 1998, 2000, 2001, 2002
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,
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 static int fetch_data PARAMS ((struct disassemble_info *, int));
59 /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
60 to ADDR (exclusive) are valid. Returns 1 for success, longjmps
62 #define FETCH_DATA(info, nibble) \
63 ((nibble) < ((instr_data_s *) (info->private_data))->max_fetched \
64 ? 1 : fetch_data ((info), (nibble)))
67 fetch_data (info, nibble)
68 struct disassemble_info *info;
71 unsigned char mybuf[20];
73 instr_data_s *priv = (instr_data_s *) info->private_data;
75 if ((nibble % 4) != 0)
78 status = (*info->read_memory_func) (priv->insn_start,
84 (*info->memory_error_func) (status, priv->insn_start, info);
85 longjmp (priv->bailout, 1);
90 unsigned char *p = mybuf;
92 for (i = 0; i < nibble;)
94 priv->words[i] = (p[0] << 8) | p[1];
97 priv->nibbles[i++] = *p >> 4;
98 priv->nibbles[i++] = *p & 0xf;
102 priv->nibbles[i++] = *p >> 4;
103 priv->nibbles[i++] = *p & 0xf;
108 priv->max_fetched = nibble;
112 static char *codes[16] =
132 static char *ctrl_names[8] =
144 static int seg_length;
145 static int print_insn_z8k PARAMS ((bfd_vma, disassemble_info *, int));
146 int z8k_lookup_instr PARAMS ((unsigned char *, disassemble_info *));
147 static void output_instr
148 PARAMS ((instr_data_s *, unsigned long, disassemble_info *));
149 static void unpack_instr PARAMS ((instr_data_s *, int, disassemble_info *));
150 static void unparse_instr PARAMS ((instr_data_s *, int));
153 print_insn_z8k (addr, info, is_segmented)
155 disassemble_info *info;
158 instr_data_s instr_data;
160 info->private_data = (PTR) &instr_data;
161 instr_data.max_fetched = 0;
162 instr_data.insn_start = addr;
163 if (setjmp (instr_data.bailout) != 0)
167 info->bytes_per_chunk = 2;
168 info->bytes_per_line = 6;
169 info->display_endian = BFD_ENDIAN_BIG;
171 instr_data.tabl_index = z8k_lookup_instr (instr_data.nibbles, info);
172 if (instr_data.tabl_index > 0)
174 unpack_instr (&instr_data, is_segmented, info);
175 unparse_instr (&instr_data, is_segmented);
176 output_instr (&instr_data, addr, info);
177 return z8k_table[instr_data.tabl_index].length + seg_length;
181 FETCH_DATA (info, 4);
182 (*info->fprintf_func) (info->stream, ".word %02x%02x",
183 instr_data.bytes[0], instr_data.bytes[2]);
189 print_insn_z8001 (addr, info)
191 disassemble_info *info;
193 return print_insn_z8k (addr, info, 1);
197 print_insn_z8002 (addr, info)
199 disassemble_info *info;
201 return print_insn_z8k (addr, info, 0);
205 z8k_lookup_instr (nibbles, info)
206 unsigned char *nibbles;
207 disassemble_info *info;
210 int nibl_index, tabl_index;
212 unsigned short instr_nibl;
213 unsigned short tabl_datum, datum_class, datum_value;
217 while (!nibl_matched && z8k_table[tabl_index].name)
221 nibl_index < z8k_table[tabl_index].length * 2 && nibl_matched;
224 if ((nibl_index % 4) == 0)
225 /* Fetch one word at a time. */
226 FETCH_DATA (info, nibl_index + 4);
227 instr_nibl = nibbles[nibl_index];
229 tabl_datum = z8k_table[tabl_index].byte_info[nibl_index];
230 datum_class = tabl_datum & CLASS_MASK;
231 datum_value = ~CLASS_MASK & tabl_datum;
236 if (datum_value != instr_nibl)
242 if (!((~instr_nibl) & 0x4))
246 if (!(instr_nibl & 0x4))
250 if (!((~instr_nibl) & 0x8))
254 if (!(instr_nibl & 0x8))
258 if (!((~instr_nibl) & 0x8))
263 if (!(instr_nibl & 0x8))
272 if ((instr_nibl | 0x2) != (datum_value | 0x2))
289 output_instr (instr_data, addr, info)
290 instr_data_s *instr_data;
291 unsigned long addr ATTRIBUTE_UNUSED;
292 disassemble_info *info;
299 num_bytes = (z8k_table[instr_data->tabl_index].length + seg_length) * 2;
300 FETCH_DATA (info, num_bytes);
302 strcat (out_str, instr_data->instr_asmsrc);
304 (*info->fprintf_func) (info->stream, "%s", out_str);
308 unpack_instr (instr_data, is_segmented, info)
309 instr_data_s *instr_data;
311 disassemble_info *info;
313 int nibl_count, loop;
314 unsigned short instr_nibl, instr_byte, instr_word;
316 unsigned int tabl_datum, datum_class;
317 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)
346 /* Negative 12 bit displacement. */
347 instr_data->displacement = instr_data->insn_start + 2
348 - (signed short) ((instr_word & 0xfff) | 0xf000) * 2;
350 instr_data->displacement = instr_data->insn_start + 2
351 - (instr_word & 0x0fff) * 2;
363 instr_data->immediate = instr_nibl;
366 instr_data->immediate = (- instr_nibl) & 0xf;
369 instr_data->immediate = (- instr_byte) & 0xff;
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;
457 instr_data->ctrl_code = instr_nibl & 0x7;
460 instr_data->flags = instr_nibl;
463 instr_data->arg_reg[datum_value] = instr_nibl;
466 instr_data->arg_reg[datum_value] = instr_nibl;
469 instr_data->displacement =
470 instr_data->insn_start + 2 + (signed char) instr_byte * 2;
474 instr_data->immediate = ((instr_nibl >> 1) & 0x1) + 1;
488 unparse_instr (instr_data, is_segmented)
489 instr_data_s *instr_data;
492 unsigned short datum_value;
493 unsigned int tabl_datum, datum_class;
494 int loop, loop_limit;
495 char out_str[80], tmp_str[25];
497 sprintf (out_str, "%s\t", z8k_table[instr_data->tabl_index].name);
499 loop_limit = z8k_table[instr_data->tabl_index].noperands;
500 for (loop = 0; loop < loop_limit; loop++)
503 strcat (out_str, ",");
505 tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
506 datum_class = tabl_datum & CLASS_MASK;
507 datum_value = tabl_datum & ~CLASS_MASK;
512 sprintf (tmp_str, "0x%0lx(r%ld)", instr_data->address,
513 instr_data->arg_reg[datum_value]);
514 strcat (out_str, tmp_str);
518 sprintf (tmp_str, "rr%ld(#0x%lx)", instr_data->arg_reg[datum_value],
519 instr_data->immediate);
521 sprintf (tmp_str, "r%ld(#0x%lx)", instr_data->arg_reg[datum_value],
522 instr_data->immediate);
523 strcat (out_str, tmp_str);
527 sprintf (tmp_str, "rr%ld(r%ld)", instr_data->arg_reg[datum_value],
528 instr_data->arg_reg[ARG_RX]);
530 sprintf (tmp_str, "r%ld(r%ld)", instr_data->arg_reg[datum_value],
531 instr_data->arg_reg[ARG_RX]);
532 strcat (out_str, tmp_str);
535 sprintf (tmp_str, "0x%0lx", instr_data->displacement);
536 strcat (out_str, tmp_str);
539 sprintf (tmp_str, "#0x%0lx", instr_data->immediate);
540 strcat (out_str, tmp_str);
543 sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
544 strcat (out_str, tmp_str);
547 sprintf (tmp_str, "%s", ctrl_names[instr_data->ctrl_code]);
548 strcat (out_str, tmp_str);
552 sprintf (tmp_str, "0x%0lx", instr_data->address);
553 strcat (out_str, tmp_str);
557 sprintf (tmp_str, "@rr%ld", instr_data->arg_reg[datum_value]);
559 sprintf (tmp_str, "@r%ld", instr_data->arg_reg[datum_value]);
560 strcat (out_str, tmp_str);
563 sprintf (tmp_str, "0x%0lx", instr_data->flags);
564 strcat (out_str, tmp_str);
567 if (instr_data->arg_reg[datum_value] >= 0x8)
568 sprintf (tmp_str, "rl%ld",
569 instr_data->arg_reg[datum_value] - 0x8);
571 sprintf (tmp_str, "rh%ld", instr_data->arg_reg[datum_value]);
572 strcat (out_str, tmp_str);
575 sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
576 strcat (out_str, tmp_str);
579 sprintf (tmp_str, "rq%ld", instr_data->arg_reg[datum_value]);
580 strcat (out_str, tmp_str);
583 sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
584 strcat (out_str, tmp_str);
588 sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
590 sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
591 strcat (out_str, tmp_str);
599 strcpy (instr_data->instr_asmsrc, out_str);