1 /* Disassemble z8000 code.
2 Copyright 1992, 1993, 1998, 2000, 2001, 2002, 2003
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 /* 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;
475 static char *intr_names[] = {
483 unparse_instr (instr_data_s *instr_data, int is_segmented)
485 unsigned short datum_value;
486 unsigned int tabl_datum, datum_class;
487 int loop, loop_limit;
488 char out_str[80], tmp_str[25];
490 sprintf (out_str, "%s\t", z8k_table[instr_data->tabl_index].name);
492 loop_limit = z8k_table[instr_data->tabl_index].noperands;
493 for (loop = 0; loop < loop_limit; loop++)
496 strcat (out_str, ",");
498 tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
499 datum_class = tabl_datum & CLASS_MASK;
500 datum_value = tabl_datum & ~CLASS_MASK;
505 sprintf (tmp_str, "0x%0lx(r%ld)", instr_data->address,
506 instr_data->arg_reg[datum_value]);
507 strcat (out_str, tmp_str);
511 sprintf (tmp_str, "rr%ld(#0x%lx)", instr_data->arg_reg[datum_value],
512 instr_data->immediate);
514 sprintf (tmp_str, "r%ld(#0x%lx)", instr_data->arg_reg[datum_value],
515 instr_data->immediate);
516 strcat (out_str, tmp_str);
520 sprintf (tmp_str, "rr%ld(r%ld)", instr_data->arg_reg[datum_value],
521 instr_data->arg_reg[ARG_RX]);
523 sprintf (tmp_str, "r%ld(r%ld)", instr_data->arg_reg[datum_value],
524 instr_data->arg_reg[ARG_RX]);
525 strcat (out_str, tmp_str);
528 sprintf (tmp_str, "0x%0lx", instr_data->displacement);
529 strcat (out_str, tmp_str);
532 if (datum_value == ARG_IMM2) /* True with EI/DI instructions only. */
534 sprintf (tmp_str, "%s", intr_names[instr_data->interrupts]);
535 strcat (out_str, tmp_str);
538 sprintf (tmp_str, "#0x%0lx", instr_data->immediate);
539 strcat (out_str, tmp_str);
542 sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
543 strcat (out_str, tmp_str);
546 sprintf (tmp_str, "%s", ctrl_names[instr_data->ctrl_code]);
547 strcat (out_str, tmp_str);
551 sprintf (tmp_str, "0x%0lx", instr_data->address);
552 strcat (out_str, tmp_str);
556 sprintf (tmp_str, "@rr%ld", instr_data->arg_reg[datum_value]);
558 sprintf (tmp_str, "@r%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, "0x%0lx", instr_data->flags);
567 strcat (out_str, tmp_str);
570 if (instr_data->arg_reg[datum_value] >= 0x8)
571 sprintf (tmp_str, "rl%ld",
572 instr_data->arg_reg[datum_value] - 0x8);
574 sprintf (tmp_str, "rh%ld", instr_data->arg_reg[datum_value]);
575 strcat (out_str, tmp_str);
578 sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
579 strcat (out_str, tmp_str);
582 sprintf (tmp_str, "rq%ld", instr_data->arg_reg[datum_value]);
583 strcat (out_str, tmp_str);
586 sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
587 strcat (out_str, tmp_str);
591 sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
593 sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
594 strcat (out_str, tmp_str);
602 strcpy (instr_data->instr_asmsrc, out_str);