Commit | Line | Data |
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252b5132 | 1 | /* Instruction printing code for the ARM |
01c7f630 | 2 | Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 Free Software Foundation, Inc. |
252b5132 RH |
3 | Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org) |
4 | Modification by James G. Smith (jsmith@cygnus.co.uk) | |
5 | ||
6 | This file is part of libopcodes. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 2 of the License, or (at your option) | |
11 | any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, but WITHOUT | |
14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
16 | more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
cb6a5892 | 22 | #include "sysdep.h" |
252b5132 RH |
23 | #include "dis-asm.h" |
24 | #define DEFINE_TABLE | |
25 | #include "arm-opc.h" | |
26 | #include "coff/internal.h" | |
27 | #include "libcoff.h" | |
28 | #include "opintl.h" | |
29 | ||
30 | /* FIXME: This shouldn't be done here */ | |
31 | #include "elf-bfd.h" | |
32 | #include "elf/internal.h" | |
33 | #include "elf/arm.h" | |
34 | ||
01c7f630 NC |
35 | #ifndef streq |
36 | #define streq(a,b) (strcmp ((a), (b)) == 0) | |
37 | #endif | |
38 | #ifndef strneq | |
39 | #define strneq(a,b,n) (strncmp ((a), (b), (n)) == 0) | |
40 | #endif | |
41 | ||
5876e06d | 42 | static char * arm_conditional[] = |
252b5132 RH |
43 | {"eq", "ne", "cs", "cc", "mi", "pl", "vs", "vc", |
44 | "hi", "ls", "ge", "lt", "gt", "le", "", "nv"}; | |
45 | ||
5876e06d | 46 | static char * arm_regnames_raw[] = |
252b5132 | 47 | {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
dd92f639 NC |
48 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"}; |
49 | ||
5876e06d | 50 | static char * arm_regnames_standard[] = |
dd92f639 NC |
51 | {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
52 | "r8", "r9", "r10", "r11", "r12", "sp", "lr", "pc"}; | |
53 | ||
5876e06d | 54 | static char * arm_regnames_apcs[] = |
dd92f639 NC |
55 | {"a1", "a2", "a3", "a4", "v1", "v2", "v3", "v4", |
56 | "v5", "v6", "sl", "fp", "ip", "sp", "lr", "pc"}; | |
57 | ||
58 | /* Choose which register name set to use. */ | |
5876e06d | 59 | static char ** arm_regnames = arm_regnames_standard; |
252b5132 | 60 | |
01c7f630 NC |
61 | static boolean force_thumb = false; |
62 | ||
5876e06d | 63 | static char * arm_fp_const[] = |
252b5132 RH |
64 | {"0.0", "1.0", "2.0", "3.0", "4.0", "5.0", "0.5", "10.0"}; |
65 | ||
5876e06d | 66 | static char * arm_shift[] = |
252b5132 | 67 | {"lsl", "lsr", "asr", "ror"}; |
01c7f630 NC |
68 | \f |
69 | /* Forward declarations. */ | |
70 | static void arm_decode_shift PARAMS ((long, fprintf_ftype, void *)); | |
71 | static int print_insn_arm PARAMS ((bfd_vma, struct disassemble_info *, long)); | |
72 | static int print_insn_thumb PARAMS ((bfd_vma, struct disassemble_info *, long)); | |
73 | static void parse_disassembler_option PARAMS ((char *)); | |
74 | static void parse_disassembler_options PARAMS ((char *)); | |
75 | \f | |
76 | /* Functions. */ | |
252b5132 RH |
77 | static void |
78 | arm_decode_shift (given, func, stream) | |
79 | long given; | |
80 | fprintf_ftype func; | |
5876e06d | 81 | void * stream; |
252b5132 RH |
82 | { |
83 | func (stream, "%s", arm_regnames[given & 0xf]); | |
5876e06d | 84 | |
252b5132 RH |
85 | if ((given & 0xff0) != 0) |
86 | { | |
87 | if ((given & 0x10) == 0) | |
88 | { | |
89 | int amount = (given & 0xf80) >> 7; | |
90 | int shift = (given & 0x60) >> 5; | |
5876e06d | 91 | |
252b5132 RH |
92 | if (amount == 0) |
93 | { | |
94 | if (shift == 3) | |
95 | { | |
96 | func (stream, ", rrx"); | |
97 | return; | |
98 | } | |
5876e06d | 99 | |
252b5132 RH |
100 | amount = 32; |
101 | } | |
5876e06d | 102 | |
252b5132 RH |
103 | func (stream, ", %s #%d", arm_shift[shift], amount); |
104 | } | |
105 | else | |
106 | func (stream, ", %s %s", arm_shift[(given & 0x60) >> 5], | |
107 | arm_regnames[(given & 0xf00) >> 8]); | |
108 | } | |
109 | } | |
110 | ||
111 | /* Print one instruction from PC on INFO->STREAM. | |
112 | Return the size of the instruction (always 4 on ARM). */ | |
113 | ||
114 | static int | |
115 | print_insn_arm (pc, info, given) | |
5876e06d NC |
116 | bfd_vma pc; |
117 | struct disassemble_info * info; | |
118 | long given; | |
252b5132 RH |
119 | { |
120 | struct arm_opcode * insn; | |
121 | void * stream = info->stream; | |
122 | fprintf_ftype func = info->fprintf_func; | |
123 | ||
124 | for (insn = arm_opcodes; insn->assembler; insn++) | |
125 | { | |
126 | if ((given & insn->mask) == insn->value) | |
127 | { | |
128 | char * c; | |
129 | ||
130 | for (c = insn->assembler; *c; c++) | |
131 | { | |
132 | if (*c == '%') | |
133 | { | |
134 | switch (*++c) | |
135 | { | |
136 | case '%': | |
137 | func (stream, "%%"); | |
138 | break; | |
139 | ||
140 | case 'a': | |
141 | if (((given & 0x000f0000) == 0x000f0000) | |
142 | && ((given & 0x02000000) == 0)) | |
143 | { | |
144 | int offset = given & 0xfff; | |
145 | ||
146 | func (stream, "[pc"); | |
147 | ||
148 | if (given & 0x01000000) | |
149 | { | |
150 | if ((given & 0x00800000) == 0) | |
151 | offset = - offset; | |
152 | ||
153 | /* pre-indexed */ | |
154 | func (stream, ", #%x]", offset); | |
155 | ||
156 | offset += pc + 8; | |
157 | ||
158 | /* Cope with the possibility of write-back being used. | |
159 | Probably a very dangerous thing for the programmer | |
160 | to do, but who are we to argue ? */ | |
161 | if (given & 0x00200000) | |
162 | func (stream, "!"); | |
163 | } | |
164 | else | |
165 | { | |
166 | /* post indexed */ | |
167 | func (stream, "], #%x", offset); | |
168 | ||
169 | offset = pc + 8; /* ie ignore the offset */ | |
170 | } | |
171 | ||
172 | func (stream, "\t; "); | |
173 | info->print_address_func (offset, info); | |
174 | } | |
175 | else | |
176 | { | |
177 | func (stream, "[%s", | |
178 | arm_regnames[(given >> 16) & 0xf]); | |
179 | if ((given & 0x01000000) != 0) | |
180 | { | |
181 | if ((given & 0x02000000) == 0) | |
182 | { | |
183 | int offset = given & 0xfff; | |
184 | if (offset) | |
185 | func (stream, ", %s#%d", | |
186 | (((given & 0x00800000) == 0) | |
187 | ? "-" : ""), offset); | |
188 | } | |
189 | else | |
190 | { | |
191 | func (stream, ", %s", | |
192 | (((given & 0x00800000) == 0) | |
193 | ? "-" : "")); | |
194 | arm_decode_shift (given, func, stream); | |
195 | } | |
196 | ||
197 | func (stream, "]%s", | |
198 | ((given & 0x00200000) != 0) ? "!" : ""); | |
199 | } | |
200 | else | |
201 | { | |
202 | if ((given & 0x02000000) == 0) | |
203 | { | |
204 | int offset = given & 0xfff; | |
205 | if (offset) | |
206 | func (stream, "], %s#%d", | |
207 | (((given & 0x00800000) == 0) | |
208 | ? "-" : ""), offset); | |
209 | else | |
210 | func (stream, "]"); | |
211 | } | |
212 | else | |
213 | { | |
214 | func (stream, "], %s", | |
215 | (((given & 0x00800000) == 0) | |
216 | ? "-" : "")); | |
217 | arm_decode_shift (given, func, stream); | |
218 | } | |
219 | } | |
220 | } | |
221 | break; | |
222 | ||
223 | case 's': | |
224 | if ((given & 0x004f0000) == 0x004f0000) | |
225 | { | |
226 | /* PC relative with immediate offset */ | |
227 | int offset = ((given & 0xf00) >> 4) | (given & 0xf); | |
886796f9 | 228 | |
252b5132 RH |
229 | if ((given & 0x00800000) == 0) |
230 | offset = -offset; | |
886796f9 NC |
231 | |
232 | func (stream, "[pc, #%x]\t; ", offset); | |
233 | ||
252b5132 RH |
234 | (*info->print_address_func) |
235 | (offset + pc + 8, info); | |
236 | } | |
237 | else | |
238 | { | |
239 | func (stream, "[%s", | |
240 | arm_regnames[(given >> 16) & 0xf]); | |
241 | if ((given & 0x01000000) != 0) | |
242 | { | |
243 | /* pre-indexed */ | |
244 | if ((given & 0x00400000) == 0x00400000) | |
245 | { | |
246 | /* immediate */ | |
247 | int offset = ((given & 0xf00) >> 4) | (given & 0xf); | |
248 | if (offset) | |
249 | func (stream, ", %s#%d", | |
250 | (((given & 0x00800000) == 0) | |
251 | ? "-" : ""), offset); | |
252 | } | |
253 | else | |
254 | { | |
255 | /* register */ | |
256 | func (stream, ", %s%s", | |
257 | (((given & 0x00800000) == 0) | |
258 | ? "-" : ""), | |
259 | arm_regnames[given & 0xf]); | |
260 | } | |
261 | ||
262 | func (stream, "]%s", | |
263 | ((given & 0x00200000) != 0) ? "!" : ""); | |
264 | } | |
265 | else | |
266 | { | |
267 | /* post-indexed */ | |
268 | if ((given & 0x00400000) == 0x00400000) | |
269 | { | |
270 | /* immediate */ | |
271 | int offset = ((given & 0xf00) >> 4) | (given & 0xf); | |
272 | if (offset) | |
273 | func (stream, "], %s#%d", | |
274 | (((given & 0x00800000) == 0) | |
275 | ? "-" : ""), offset); | |
276 | else | |
277 | func (stream, "]"); | |
278 | } | |
279 | else | |
280 | { | |
281 | /* register */ | |
282 | func (stream, "], %s%s", | |
283 | (((given & 0x00800000) == 0) | |
284 | ? "-" : ""), | |
285 | arm_regnames[given & 0xf]); | |
286 | } | |
287 | } | |
288 | } | |
289 | break; | |
290 | ||
291 | case 'b': | |
292 | (*info->print_address_func) | |
293 | (BDISP (given) * 4 + pc + 8, info); | |
294 | break; | |
295 | ||
296 | case 'c': | |
297 | func (stream, "%s", | |
298 | arm_conditional [(given >> 28) & 0xf]); | |
299 | break; | |
300 | ||
301 | case 'm': | |
302 | { | |
303 | int started = 0; | |
304 | int reg; | |
305 | ||
306 | func (stream, "{"); | |
307 | for (reg = 0; reg < 16; reg++) | |
308 | if ((given & (1 << reg)) != 0) | |
309 | { | |
310 | if (started) | |
311 | func (stream, ", "); | |
312 | started = 1; | |
313 | func (stream, "%s", arm_regnames[reg]); | |
314 | } | |
315 | func (stream, "}"); | |
316 | } | |
317 | break; | |
318 | ||
319 | case 'o': | |
320 | if ((given & 0x02000000) != 0) | |
321 | { | |
322 | int rotate = (given & 0xf00) >> 7; | |
323 | int immed = (given & 0xff); | |
9f20bbfd NC |
324 | immed = (((immed << (32 - rotate)) |
325 | | (immed >> rotate)) & 0xffffffff); | |
326 | func (stream, "#%d\t; 0x%x", immed, immed); | |
252b5132 RH |
327 | } |
328 | else | |
329 | arm_decode_shift (given, func, stream); | |
330 | break; | |
331 | ||
332 | case 'p': | |
333 | if ((given & 0x0000f000) == 0x0000f000) | |
334 | func (stream, "p"); | |
335 | break; | |
336 | ||
337 | case 't': | |
338 | if ((given & 0x01200000) == 0x00200000) | |
339 | func (stream, "t"); | |
340 | break; | |
341 | ||
342 | case 'h': | |
343 | if ((given & 0x00000020) == 0x00000020) | |
344 | func (stream, "h"); | |
345 | else | |
346 | func (stream, "b"); | |
347 | break; | |
348 | ||
349 | case 'A': | |
350 | func (stream, "[%s", arm_regnames [(given >> 16) & 0xf]); | |
351 | if ((given & 0x01000000) != 0) | |
352 | { | |
353 | int offset = given & 0xff; | |
354 | if (offset) | |
355 | func (stream, ", %s#%d]%s", | |
356 | ((given & 0x00800000) == 0 ? "-" : ""), | |
357 | offset * 4, | |
358 | ((given & 0x00200000) != 0 ? "!" : "")); | |
359 | else | |
360 | func (stream, "]"); | |
361 | } | |
362 | else | |
363 | { | |
364 | int offset = given & 0xff; | |
365 | if (offset) | |
366 | func (stream, "], %s#%d", | |
367 | ((given & 0x00800000) == 0 ? "-" : ""), | |
368 | offset * 4); | |
369 | else | |
370 | func (stream, "]"); | |
371 | } | |
372 | break; | |
373 | ||
374 | case 'C': | |
375 | switch (given & 0x00090000) | |
376 | { | |
377 | default: | |
378 | func (stream, "_???"); | |
379 | break; | |
380 | case 0x90000: | |
381 | func (stream, "_all"); | |
382 | break; | |
383 | case 0x10000: | |
384 | func (stream, "_ctl"); | |
385 | break; | |
386 | case 0x80000: | |
387 | func (stream, "_flg"); | |
388 | break; | |
389 | } | |
390 | break; | |
391 | ||
392 | case 'F': | |
393 | switch (given & 0x00408000) | |
394 | { | |
395 | case 0: | |
396 | func (stream, "4"); | |
397 | break; | |
398 | case 0x8000: | |
399 | func (stream, "1"); | |
400 | break; | |
401 | case 0x00400000: | |
402 | func (stream, "2"); | |
403 | break; | |
404 | default: | |
405 | func (stream, "3"); | |
406 | } | |
407 | break; | |
408 | ||
409 | case 'P': | |
410 | switch (given & 0x00080080) | |
411 | { | |
412 | case 0: | |
413 | func (stream, "s"); | |
414 | break; | |
415 | case 0x80: | |
416 | func (stream, "d"); | |
417 | break; | |
418 | case 0x00080000: | |
419 | func (stream, "e"); | |
420 | break; | |
421 | default: | |
422 | func (stream, _("<illegal precision>")); | |
423 | break; | |
424 | } | |
425 | break; | |
426 | case 'Q': | |
427 | switch (given & 0x00408000) | |
428 | { | |
429 | case 0: | |
430 | func (stream, "s"); | |
431 | break; | |
432 | case 0x8000: | |
433 | func (stream, "d"); | |
434 | break; | |
435 | case 0x00400000: | |
436 | func (stream, "e"); | |
437 | break; | |
438 | default: | |
439 | func (stream, "p"); | |
440 | break; | |
441 | } | |
442 | break; | |
443 | case 'R': | |
444 | switch (given & 0x60) | |
445 | { | |
446 | case 0: | |
447 | break; | |
448 | case 0x20: | |
449 | func (stream, "p"); | |
450 | break; | |
451 | case 0x40: | |
452 | func (stream, "m"); | |
453 | break; | |
454 | default: | |
455 | func (stream, "z"); | |
456 | break; | |
457 | } | |
458 | break; | |
459 | ||
460 | case '0': case '1': case '2': case '3': case '4': | |
461 | case '5': case '6': case '7': case '8': case '9': | |
462 | { | |
463 | int bitstart = *c++ - '0'; | |
464 | int bitend = 0; | |
465 | while (*c >= '0' && *c <= '9') | |
466 | bitstart = (bitstart * 10) + *c++ - '0'; | |
467 | ||
468 | switch (*c) | |
469 | { | |
470 | case '-': | |
471 | c++; | |
472 | while (*c >= '0' && *c <= '9') | |
473 | bitend = (bitend * 10) + *c++ - '0'; | |
474 | if (!bitend) | |
475 | abort (); | |
476 | switch (*c) | |
477 | { | |
478 | case 'r': | |
479 | { | |
480 | long reg; | |
481 | reg = given >> bitstart; | |
482 | reg &= (2 << (bitend - bitstart)) - 1; | |
483 | func (stream, "%s", arm_regnames[reg]); | |
484 | } | |
485 | break; | |
486 | case 'd': | |
487 | { | |
488 | long reg; | |
489 | reg = given >> bitstart; | |
490 | reg &= (2 << (bitend - bitstart)) - 1; | |
491 | func (stream, "%d", reg); | |
492 | } | |
493 | break; | |
494 | case 'x': | |
495 | { | |
496 | long reg; | |
497 | reg = given >> bitstart; | |
498 | reg &= (2 << (bitend - bitstart)) - 1; | |
499 | func (stream, "0x%08x", reg); | |
5876e06d NC |
500 | |
501 | /* Some SWI instructions have special meanings. */ | |
502 | if ((given & 0x0fffffff) == 0x0FF00000) | |
503 | func (stream, "\t; IMB"); | |
504 | else if ((given & 0x0fffffff) == 0x0FF00001) | |
505 | func (stream, "\t; IMBRange"); | |
252b5132 RH |
506 | } |
507 | break; | |
cfbd315c DL |
508 | case 'X': |
509 | { | |
510 | long reg; | |
511 | reg = given >> bitstart; | |
512 | reg &= (2 << (bitend - bitstart)) - 1; | |
513 | func (stream, "%01x", reg & 0xf); | |
514 | } | |
515 | break; | |
252b5132 RH |
516 | case 'f': |
517 | { | |
518 | long reg; | |
519 | reg = given >> bitstart; | |
520 | reg &= (2 << (bitend - bitstart)) - 1; | |
521 | if (reg > 7) | |
522 | func (stream, "#%s", | |
523 | arm_fp_const[reg & 7]); | |
524 | else | |
525 | func (stream, "f%d", reg); | |
526 | } | |
527 | break; | |
528 | default: | |
529 | abort (); | |
530 | } | |
531 | break; | |
532 | case '`': | |
533 | c++; | |
534 | if ((given & (1 << bitstart)) == 0) | |
535 | func (stream, "%c", *c); | |
536 | break; | |
537 | case '\'': | |
538 | c++; | |
539 | if ((given & (1 << bitstart)) != 0) | |
540 | func (stream, "%c", *c); | |
541 | break; | |
542 | case '?': | |
543 | ++c; | |
544 | if ((given & (1 << bitstart)) != 0) | |
545 | func (stream, "%c", *c++); | |
546 | else | |
547 | func (stream, "%c", *++c); | |
548 | break; | |
549 | default: | |
550 | abort (); | |
551 | } | |
552 | break; | |
553 | ||
554 | default: | |
555 | abort (); | |
556 | } | |
557 | } | |
558 | } | |
559 | else | |
560 | func (stream, "%c", *c); | |
561 | } | |
562 | return 4; | |
563 | } | |
564 | } | |
565 | abort (); | |
566 | } | |
567 | ||
568 | /* Print one instruction from PC on INFO->STREAM. | |
569 | Return the size of the instruction. */ | |
570 | ||
571 | static int | |
572 | print_insn_thumb (pc, info, given) | |
5876e06d NC |
573 | bfd_vma pc; |
574 | struct disassemble_info * info; | |
575 | long given; | |
252b5132 | 576 | { |
5876e06d NC |
577 | struct thumb_opcode * insn; |
578 | void * stream = info->stream; | |
579 | fprintf_ftype func = info->fprintf_func; | |
252b5132 RH |
580 | |
581 | for (insn = thumb_opcodes; insn->assembler; insn++) | |
582 | { | |
583 | if ((given & insn->mask) == insn->value) | |
584 | { | |
5876e06d | 585 | char * c = insn->assembler; |
252b5132 RH |
586 | |
587 | /* Special processing for Thumb 2 instruction BL sequence: */ | |
588 | if (!*c) /* check for empty (not NULL) assembler string */ | |
589 | { | |
590 | info->bytes_per_chunk = 4; | |
591 | info->bytes_per_line = 4; | |
592 | ||
cb268829 | 593 | func (stream, "bl\t"); |
252b5132 RH |
594 | (*info->print_address_func) |
595 | (BDISP23 (given) * 2 + pc + 4, info); | |
596 | return 4; | |
597 | } | |
598 | else | |
599 | { | |
600 | info->bytes_per_chunk = 2; | |
601 | info->bytes_per_line = 4; | |
602 | ||
603 | given &= 0xffff; | |
cb268829 | 604 | |
252b5132 RH |
605 | for (; *c; c++) |
606 | { | |
607 | if (*c == '%') | |
608 | { | |
609 | int domaskpc = 0; | |
610 | int domasklr = 0; | |
5876e06d | 611 | |
252b5132 RH |
612 | switch (*++c) |
613 | { | |
614 | case '%': | |
615 | func (stream, "%%"); | |
616 | break; | |
617 | ||
618 | case 'S': | |
619 | { | |
620 | long reg; | |
621 | reg = (given >> 3) & 0x7; | |
622 | if (given & (1 << 6)) | |
623 | reg += 8; | |
624 | func (stream, "%s", arm_regnames[reg]); | |
625 | } | |
626 | break; | |
627 | ||
628 | case 'D': | |
629 | { | |
630 | long reg; | |
5876e06d | 631 | |
252b5132 RH |
632 | reg = given & 0x7; |
633 | if (given & (1 << 7)) | |
634 | reg += 8; | |
635 | func (stream, "%s", arm_regnames[reg]); | |
636 | } | |
637 | break; | |
638 | ||
639 | case 'T': | |
640 | func (stream, "%s", | |
641 | arm_conditional [(given >> 8) & 0xf]); | |
642 | break; | |
643 | ||
644 | case 'N': | |
645 | if (given & (1 << 8)) | |
646 | domasklr = 1; | |
647 | /* fall through */ | |
648 | case 'O': | |
649 | if (*c == 'O' && (given & (1 << 8))) | |
650 | domaskpc = 1; | |
651 | /* fall through */ | |
652 | case 'M': | |
653 | { | |
654 | int started = 0; | |
655 | int reg; | |
5876e06d | 656 | |
252b5132 RH |
657 | func (stream, "{"); |
658 | /* It would be nice if we could spot | |
659 | ranges, and generate the rS-rE format: */ | |
660 | for (reg = 0; (reg < 8); reg++) | |
661 | if ((given & (1 << reg)) != 0) | |
662 | { | |
663 | if (started) | |
664 | func (stream, ", "); | |
665 | started = 1; | |
666 | func (stream, "%s", arm_regnames[reg]); | |
667 | } | |
668 | ||
669 | if (domasklr) | |
670 | { | |
671 | if (started) | |
672 | func (stream, ", "); | |
673 | started = 1; | |
674 | func (stream, "lr"); | |
675 | } | |
676 | ||
677 | if (domaskpc) | |
678 | { | |
679 | if (started) | |
680 | func (stream, ", "); | |
681 | func (stream, "pc"); | |
682 | } | |
683 | ||
684 | func (stream, "}"); | |
685 | } | |
686 | break; | |
687 | ||
688 | ||
689 | case '0': case '1': case '2': case '3': case '4': | |
690 | case '5': case '6': case '7': case '8': case '9': | |
691 | { | |
692 | int bitstart = *c++ - '0'; | |
693 | int bitend = 0; | |
5876e06d | 694 | |
252b5132 RH |
695 | while (*c >= '0' && *c <= '9') |
696 | bitstart = (bitstart * 10) + *c++ - '0'; | |
697 | ||
698 | switch (*c) | |
699 | { | |
700 | case '-': | |
701 | { | |
702 | long reg; | |
5876e06d | 703 | |
252b5132 RH |
704 | c++; |
705 | while (*c >= '0' && *c <= '9') | |
706 | bitend = (bitend * 10) + *c++ - '0'; | |
707 | if (!bitend) | |
708 | abort (); | |
709 | reg = given >> bitstart; | |
710 | reg &= (2 << (bitend - bitstart)) - 1; | |
711 | switch (*c) | |
712 | { | |
713 | case 'r': | |
714 | func (stream, "%s", arm_regnames[reg]); | |
715 | break; | |
716 | ||
717 | case 'd': | |
718 | func (stream, "%d", reg); | |
719 | break; | |
720 | ||
721 | case 'H': | |
722 | func (stream, "%d", reg << 1); | |
723 | break; | |
724 | ||
725 | case 'W': | |
726 | func (stream, "%d", reg << 2); | |
727 | break; | |
728 | ||
729 | case 'a': | |
730 | /* PC-relative address -- the bottom two | |
731 | bits of the address are dropped before | |
732 | the calculation. */ | |
733 | info->print_address_func | |
734 | (((pc + 4) & ~3) + (reg << 2), info); | |
735 | break; | |
736 | ||
737 | case 'x': | |
738 | func (stream, "0x%04x", reg); | |
739 | break; | |
740 | ||
741 | case 'I': | |
742 | reg = ((reg ^ (1 << bitend)) - (1 << bitend)); | |
743 | func (stream, "%d", reg); | |
744 | break; | |
745 | ||
746 | case 'B': | |
747 | reg = ((reg ^ (1 << bitend)) - (1 << bitend)); | |
748 | (*info->print_address_func) | |
749 | (reg * 2 + pc + 4, info); | |
750 | break; | |
751 | ||
752 | default: | |
5876e06d | 753 | abort (); |
252b5132 RH |
754 | } |
755 | } | |
756 | break; | |
757 | ||
758 | case '\'': | |
759 | c++; | |
760 | if ((given & (1 << bitstart)) != 0) | |
761 | func (stream, "%c", *c); | |
762 | break; | |
763 | ||
764 | case '?': | |
765 | ++c; | |
766 | if ((given & (1 << bitstart)) != 0) | |
767 | func (stream, "%c", *c++); | |
768 | else | |
769 | func (stream, "%c", *++c); | |
770 | break; | |
771 | ||
772 | default: | |
5876e06d | 773 | abort (); |
252b5132 RH |
774 | } |
775 | } | |
776 | break; | |
777 | ||
778 | default: | |
779 | abort (); | |
780 | } | |
781 | } | |
782 | else | |
783 | func (stream, "%c", *c); | |
784 | } | |
785 | } | |
786 | return 2; | |
787 | } | |
788 | } | |
789 | ||
790 | /* no match */ | |
791 | abort (); | |
792 | } | |
793 | ||
dd92f639 NC |
794 | /* Select a different register name set. |
795 | Returns true if the name set selected is the APCS name set. */ | |
796 | int | |
797 | arm_toggle_regnames () | |
798 | { | |
799 | if (arm_regnames == arm_regnames_standard) | |
800 | arm_regnames = arm_regnames_apcs; | |
801 | else | |
802 | arm_regnames = arm_regnames_standard; | |
803 | ||
804 | return arm_regnames == arm_regnames_apcs; | |
805 | } | |
806 | ||
807 | static void | |
01c7f630 NC |
808 | parse_disassembler_option (option) |
809 | char * option; | |
dd92f639 | 810 | { |
01c7f630 | 811 | if (option == NULL) |
dd92f639 NC |
812 | return; |
813 | ||
01c7f630 | 814 | if (strneq (option, "reg-names-", 10)) |
dd92f639 | 815 | { |
01c7f630 | 816 | option += 10; |
dd92f639 | 817 | |
01c7f630 | 818 | if (streq (option, "std")) |
dd92f639 | 819 | arm_regnames = arm_regnames_standard; |
01c7f630 | 820 | else if (streq (option, "apcs")) |
dd92f639 | 821 | arm_regnames = arm_regnames_apcs; |
01c7f630 | 822 | else if (streq (option, "raw")) |
dd92f639 NC |
823 | arm_regnames = arm_regnames_raw; |
824 | else | |
01c7f630 | 825 | fprintf (stderr, "Unrecognised register name set: %s\n", option); |
dd92f639 | 826 | } |
01c7f630 NC |
827 | else if (streq (option, "force-thumb")) |
828 | force_thumb = 1; | |
829 | else if (streq (option, "no-force-thumb")) | |
830 | force_thumb = 0; | |
dd92f639 | 831 | else |
01c7f630 | 832 | fprintf (stderr, "Unrecognised disassembler option: %s\n", option); |
dd92f639 NC |
833 | |
834 | return; | |
835 | } | |
836 | ||
01c7f630 NC |
837 | static void |
838 | parse_disassembler_options (options) | |
839 | char * options; | |
840 | { | |
841 | char * space; | |
842 | ||
843 | if (options == NULL) | |
844 | return; | |
845 | ||
846 | do | |
847 | { | |
848 | space = strchr (options, ' '); | |
849 | ||
850 | if (space) | |
851 | { | |
852 | * space = '\0'; | |
853 | parse_disassembler_option (options); | |
854 | * space = ' '; | |
855 | options = space + 1; | |
856 | } | |
857 | else | |
858 | parse_disassembler_option (options); | |
859 | } | |
860 | while (space); | |
861 | } | |
862 | ||
863 | /* NOTE: There are no checks in these routines that the relevant number of | |
864 | data bytes exist. */ | |
252b5132 RH |
865 | |
866 | int | |
867 | print_insn_big_arm (pc, info) | |
868 | bfd_vma pc; | |
5876e06d | 869 | struct disassemble_info * info; |
252b5132 RH |
870 | { |
871 | unsigned char b[4]; | |
872 | long given; | |
873 | int status; | |
5876e06d NC |
874 | coff_symbol_type * cs; |
875 | elf_symbol_type * es; | |
252b5132 RH |
876 | int is_thumb; |
877 | ||
dd92f639 NC |
878 | if (info->disassembler_options) |
879 | { | |
880 | parse_disassembler_options (info->disassembler_options); | |
881 | ||
882 | /* To avoid repeated parsing of this option, we remove it here. */ | |
883 | info->disassembler_options = NULL; | |
884 | } | |
885 | ||
01c7f630 NC |
886 | is_thumb = force_thumb; |
887 | ||
888 | if (!is_thumb && info->symbols != NULL) | |
252b5132 | 889 | { |
5876e06d NC |
890 | if (bfd_asymbol_flavour (*info->symbols) == bfd_target_coff_flavour) |
891 | { | |
892 | cs = coffsymbol (*info->symbols); | |
893 | is_thumb = ( cs->native->u.syment.n_sclass == C_THUMBEXT | |
894 | || cs->native->u.syment.n_sclass == C_THUMBSTAT | |
895 | || cs->native->u.syment.n_sclass == C_THUMBLABEL | |
896 | || cs->native->u.syment.n_sclass == C_THUMBEXTFUNC | |
897 | || cs->native->u.syment.n_sclass == C_THUMBSTATFUNC); | |
898 | } | |
899 | else if (bfd_asymbol_flavour (*info->symbols) == bfd_target_elf_flavour) | |
900 | { | |
901 | es = *(elf_symbol_type **)(info->symbols); | |
902 | is_thumb = ELF_ST_TYPE (es->internal_elf_sym.st_info) == | |
903 | STT_ARM_TFUNC; | |
904 | } | |
905 | } | |
252b5132 RH |
906 | |
907 | info->bytes_per_chunk = 4; | |
908 | info->display_endian = BFD_ENDIAN_BIG; | |
909 | ||
910 | /* Always fetch word aligned values. */ | |
911 | ||
912 | status = (*info->read_memory_func) (pc & ~ 0x3, (bfd_byte *) &b[0], 4, info); | |
913 | if (status != 0) | |
914 | { | |
915 | (*info->memory_error_func) (status, pc, info); | |
916 | return -1; | |
917 | } | |
918 | ||
919 | if (is_thumb) | |
920 | { | |
921 | if (pc & 0x2) | |
922 | { | |
923 | given = (b[2] << 8) | b[3]; | |
924 | ||
925 | status = info->read_memory_func ((pc + 4) & ~ 0x3, (bfd_byte *) b, 4, info); | |
926 | if (status != 0) | |
927 | { | |
928 | info->memory_error_func (status, pc + 4, info); | |
929 | return -1; | |
930 | } | |
931 | ||
932 | given |= (b[0] << 24) | (b[1] << 16); | |
933 | } | |
934 | else | |
5876e06d | 935 | given = (b[0] << 8) | b[1] | (b[2] << 24) | (b[3] << 16); |
252b5132 RH |
936 | } |
937 | else | |
5876e06d | 938 | given = (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | (b[3]); |
252b5132 RH |
939 | |
940 | if (is_thumb) | |
5876e06d | 941 | status = print_insn_thumb (pc, info, given); |
252b5132 | 942 | else |
5876e06d | 943 | status = print_insn_arm (pc, info, given); |
252b5132 RH |
944 | |
945 | return status; | |
946 | } | |
947 | ||
948 | int | |
949 | print_insn_little_arm (pc, info) | |
950 | bfd_vma pc; | |
951 | struct disassemble_info * info; | |
952 | { | |
953 | unsigned char b[4]; | |
954 | long given; | |
955 | int status; | |
5876e06d NC |
956 | coff_symbol_type * cs; |
957 | elf_symbol_type * es; | |
252b5132 RH |
958 | int is_thumb; |
959 | ||
dd92f639 NC |
960 | if (info->disassembler_options) |
961 | { | |
962 | parse_disassembler_options (info->disassembler_options); | |
963 | ||
964 | /* To avoid repeated parsing of this option, we remove it here. */ | |
965 | info->disassembler_options = NULL; | |
966 | } | |
01c7f630 NC |
967 | |
968 | is_thumb = force_thumb; | |
dd92f639 | 969 | |
01c7f630 | 970 | if (!is_thumb && info->symbols != NULL) |
252b5132 | 971 | { |
5876e06d NC |
972 | if (bfd_asymbol_flavour (*info->symbols) == bfd_target_coff_flavour) |
973 | { | |
974 | cs = coffsymbol (*info->symbols); | |
975 | is_thumb = ( cs->native->u.syment.n_sclass == C_THUMBEXT | |
976 | || cs->native->u.syment.n_sclass == C_THUMBSTAT | |
977 | || cs->native->u.syment.n_sclass == C_THUMBLABEL | |
978 | || cs->native->u.syment.n_sclass == C_THUMBEXTFUNC | |
979 | || cs->native->u.syment.n_sclass == C_THUMBSTATFUNC); | |
980 | } | |
981 | else if (bfd_asymbol_flavour (*info->symbols) == bfd_target_elf_flavour) | |
982 | { | |
983 | es = *(elf_symbol_type **)(info->symbols); | |
984 | is_thumb = ELF_ST_TYPE (es->internal_elf_sym.st_info) == | |
985 | STT_ARM_TFUNC; | |
986 | } | |
987 | } | |
252b5132 | 988 | |
252b5132 RH |
989 | info->bytes_per_chunk = 4; |
990 | info->display_endian = BFD_ENDIAN_LITTLE; | |
991 | ||
992 | status = (*info->read_memory_func) (pc, (bfd_byte *) &b[0], 4, info); | |
993 | if (status != 0 && is_thumb) | |
994 | { | |
995 | info->bytes_per_chunk = 2; | |
996 | ||
997 | status = info->read_memory_func (pc, (bfd_byte *) b, 2, info); | |
998 | b[3] = b[2] = 0; | |
999 | } | |
01c7f630 | 1000 | |
252b5132 RH |
1001 | if (status != 0) |
1002 | { | |
01c7f630 | 1003 | info->memory_error_func (status, pc, info); |
252b5132 RH |
1004 | return -1; |
1005 | } | |
1006 | ||
1007 | given = (b[0]) | (b[1] << 8) | (b[2] << 16) | (b[3] << 24); | |
1008 | ||
1009 | if (is_thumb) | |
5876e06d | 1010 | status = print_insn_thumb (pc, info, given); |
252b5132 | 1011 | else |
5876e06d | 1012 | status = print_insn_arm (pc, info, given); |
252b5132 RH |
1013 | |
1014 | return status; | |
1015 | } |