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252b5132 RH |
1 | /* Instruction printing code for the ARM |
2 | Copyright (C) 1994, 95, 96, 97, 1998 Free Software Foundation, Inc. | |
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 | ||
22 | #include "dis-asm.h" | |
23 | #define DEFINE_TABLE | |
24 | #include "arm-opc.h" | |
25 | #include "coff/internal.h" | |
26 | #include "libcoff.h" | |
27 | #include "opintl.h" | |
28 | ||
29 | /* FIXME: This shouldn't be done here */ | |
30 | #include "elf-bfd.h" | |
31 | #include "elf/internal.h" | |
32 | #include "elf/arm.h" | |
33 | ||
34 | static char *arm_conditional[] = | |
35 | {"eq", "ne", "cs", "cc", "mi", "pl", "vs", "vc", | |
36 | "hi", "ls", "ge", "lt", "gt", "le", "", "nv"}; | |
37 | ||
38 | static char *arm_regnames[] = | |
39 | {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
40 | "r8", "r9", "sl", "fp", "ip", "sp", "lr", "pc"}; | |
41 | ||
42 | static char *arm_fp_const[] = | |
43 | {"0.0", "1.0", "2.0", "3.0", "4.0", "5.0", "0.5", "10.0"}; | |
44 | ||
45 | static char *arm_shift[] = | |
46 | {"lsl", "lsr", "asr", "ror"}; | |
47 | ||
48 | static int print_insn_arm PARAMS ((bfd_vma, struct disassemble_info *, | |
49 | long)); | |
50 | ||
51 | static void | |
52 | arm_decode_shift (given, func, stream) | |
53 | long given; | |
54 | fprintf_ftype func; | |
55 | void *stream; | |
56 | { | |
57 | func (stream, "%s", arm_regnames[given & 0xf]); | |
58 | if ((given & 0xff0) != 0) | |
59 | { | |
60 | if ((given & 0x10) == 0) | |
61 | { | |
62 | int amount = (given & 0xf80) >> 7; | |
63 | int shift = (given & 0x60) >> 5; | |
64 | if (amount == 0) | |
65 | { | |
66 | if (shift == 3) | |
67 | { | |
68 | func (stream, ", rrx"); | |
69 | return; | |
70 | } | |
71 | amount = 32; | |
72 | } | |
73 | func (stream, ", %s #%d", arm_shift[shift], amount); | |
74 | } | |
75 | else | |
76 | func (stream, ", %s %s", arm_shift[(given & 0x60) >> 5], | |
77 | arm_regnames[(given & 0xf00) >> 8]); | |
78 | } | |
79 | } | |
80 | ||
81 | /* Print one instruction from PC on INFO->STREAM. | |
82 | Return the size of the instruction (always 4 on ARM). */ | |
83 | ||
84 | static int | |
85 | print_insn_arm (pc, info, given) | |
86 | bfd_vma pc; | |
87 | struct disassemble_info *info; | |
88 | long given; | |
89 | { | |
90 | struct arm_opcode * insn; | |
91 | void * stream = info->stream; | |
92 | fprintf_ftype func = info->fprintf_func; | |
93 | ||
94 | for (insn = arm_opcodes; insn->assembler; insn++) | |
95 | { | |
96 | if ((given & insn->mask) == insn->value) | |
97 | { | |
98 | char * c; | |
99 | ||
100 | for (c = insn->assembler; *c; c++) | |
101 | { | |
102 | if (*c == '%') | |
103 | { | |
104 | switch (*++c) | |
105 | { | |
106 | case '%': | |
107 | func (stream, "%%"); | |
108 | break; | |
109 | ||
110 | case 'a': | |
111 | if (((given & 0x000f0000) == 0x000f0000) | |
112 | && ((given & 0x02000000) == 0)) | |
113 | { | |
114 | int offset = given & 0xfff; | |
115 | ||
116 | func (stream, "[pc"); | |
117 | ||
118 | if (given & 0x01000000) | |
119 | { | |
120 | if ((given & 0x00800000) == 0) | |
121 | offset = - offset; | |
122 | ||
123 | /* pre-indexed */ | |
124 | func (stream, ", #%x]", offset); | |
125 | ||
126 | offset += pc + 8; | |
127 | ||
128 | /* Cope with the possibility of write-back being used. | |
129 | Probably a very dangerous thing for the programmer | |
130 | to do, but who are we to argue ? */ | |
131 | if (given & 0x00200000) | |
132 | func (stream, "!"); | |
133 | } | |
134 | else | |
135 | { | |
136 | /* post indexed */ | |
137 | func (stream, "], #%x", offset); | |
138 | ||
139 | offset = pc + 8; /* ie ignore the offset */ | |
140 | } | |
141 | ||
142 | func (stream, "\t; "); | |
143 | info->print_address_func (offset, info); | |
144 | } | |
145 | else | |
146 | { | |
147 | func (stream, "[%s", | |
148 | arm_regnames[(given >> 16) & 0xf]); | |
149 | if ((given & 0x01000000) != 0) | |
150 | { | |
151 | if ((given & 0x02000000) == 0) | |
152 | { | |
153 | int offset = given & 0xfff; | |
154 | if (offset) | |
155 | func (stream, ", %s#%d", | |
156 | (((given & 0x00800000) == 0) | |
157 | ? "-" : ""), offset); | |
158 | } | |
159 | else | |
160 | { | |
161 | func (stream, ", %s", | |
162 | (((given & 0x00800000) == 0) | |
163 | ? "-" : "")); | |
164 | arm_decode_shift (given, func, stream); | |
165 | } | |
166 | ||
167 | func (stream, "]%s", | |
168 | ((given & 0x00200000) != 0) ? "!" : ""); | |
169 | } | |
170 | else | |
171 | { | |
172 | if ((given & 0x02000000) == 0) | |
173 | { | |
174 | int offset = given & 0xfff; | |
175 | if (offset) | |
176 | func (stream, "], %s#%d", | |
177 | (((given & 0x00800000) == 0) | |
178 | ? "-" : ""), offset); | |
179 | else | |
180 | func (stream, "]"); | |
181 | } | |
182 | else | |
183 | { | |
184 | func (stream, "], %s", | |
185 | (((given & 0x00800000) == 0) | |
186 | ? "-" : "")); | |
187 | arm_decode_shift (given, func, stream); | |
188 | } | |
189 | } | |
190 | } | |
191 | break; | |
192 | ||
193 | case 's': | |
194 | if ((given & 0x004f0000) == 0x004f0000) | |
195 | { | |
196 | /* PC relative with immediate offset */ | |
197 | int offset = ((given & 0xf00) >> 4) | (given & 0xf); | |
886796f9 | 198 | |
252b5132 RH |
199 | if ((given & 0x00800000) == 0) |
200 | offset = -offset; | |
886796f9 NC |
201 | |
202 | func (stream, "[pc, #%x]\t; ", offset); | |
203 | ||
252b5132 RH |
204 | (*info->print_address_func) |
205 | (offset + pc + 8, info); | |
206 | } | |
207 | else | |
208 | { | |
209 | func (stream, "[%s", | |
210 | arm_regnames[(given >> 16) & 0xf]); | |
211 | if ((given & 0x01000000) != 0) | |
212 | { | |
213 | /* pre-indexed */ | |
214 | if ((given & 0x00400000) == 0x00400000) | |
215 | { | |
216 | /* immediate */ | |
217 | int offset = ((given & 0xf00) >> 4) | (given & 0xf); | |
218 | if (offset) | |
219 | func (stream, ", %s#%d", | |
220 | (((given & 0x00800000) == 0) | |
221 | ? "-" : ""), offset); | |
222 | } | |
223 | else | |
224 | { | |
225 | /* register */ | |
226 | func (stream, ", %s%s", | |
227 | (((given & 0x00800000) == 0) | |
228 | ? "-" : ""), | |
229 | arm_regnames[given & 0xf]); | |
230 | } | |
231 | ||
232 | func (stream, "]%s", | |
233 | ((given & 0x00200000) != 0) ? "!" : ""); | |
234 | } | |
235 | else | |
236 | { | |
237 | /* post-indexed */ | |
238 | if ((given & 0x00400000) == 0x00400000) | |
239 | { | |
240 | /* immediate */ | |
241 | int offset = ((given & 0xf00) >> 4) | (given & 0xf); | |
242 | if (offset) | |
243 | func (stream, "], %s#%d", | |
244 | (((given & 0x00800000) == 0) | |
245 | ? "-" : ""), offset); | |
246 | else | |
247 | func (stream, "]"); | |
248 | } | |
249 | else | |
250 | { | |
251 | /* register */ | |
252 | func (stream, "], %s%s", | |
253 | (((given & 0x00800000) == 0) | |
254 | ? "-" : ""), | |
255 | arm_regnames[given & 0xf]); | |
256 | } | |
257 | } | |
258 | } | |
259 | break; | |
260 | ||
261 | case 'b': | |
262 | (*info->print_address_func) | |
263 | (BDISP (given) * 4 + pc + 8, info); | |
264 | break; | |
265 | ||
266 | case 'c': | |
267 | func (stream, "%s", | |
268 | arm_conditional [(given >> 28) & 0xf]); | |
269 | break; | |
270 | ||
271 | case 'm': | |
272 | { | |
273 | int started = 0; | |
274 | int reg; | |
275 | ||
276 | func (stream, "{"); | |
277 | for (reg = 0; reg < 16; reg++) | |
278 | if ((given & (1 << reg)) != 0) | |
279 | { | |
280 | if (started) | |
281 | func (stream, ", "); | |
282 | started = 1; | |
283 | func (stream, "%s", arm_regnames[reg]); | |
284 | } | |
285 | func (stream, "}"); | |
286 | } | |
287 | break; | |
288 | ||
289 | case 'o': | |
290 | if ((given & 0x02000000) != 0) | |
291 | { | |
292 | int rotate = (given & 0xf00) >> 7; | |
293 | int immed = (given & 0xff); | |
294 | func (stream, "#%d", | |
295 | ((immed << (32 - rotate)) | |
296 | | (immed >> rotate)) & 0xffffffff); | |
297 | } | |
298 | else | |
299 | arm_decode_shift (given, func, stream); | |
300 | break; | |
301 | ||
302 | case 'p': | |
303 | if ((given & 0x0000f000) == 0x0000f000) | |
304 | func (stream, "p"); | |
305 | break; | |
306 | ||
307 | case 't': | |
308 | if ((given & 0x01200000) == 0x00200000) | |
309 | func (stream, "t"); | |
310 | break; | |
311 | ||
312 | case 'h': | |
313 | if ((given & 0x00000020) == 0x00000020) | |
314 | func (stream, "h"); | |
315 | else | |
316 | func (stream, "b"); | |
317 | break; | |
318 | ||
319 | case 'A': | |
320 | func (stream, "[%s", arm_regnames [(given >> 16) & 0xf]); | |
321 | if ((given & 0x01000000) != 0) | |
322 | { | |
323 | int offset = given & 0xff; | |
324 | if (offset) | |
325 | func (stream, ", %s#%d]%s", | |
326 | ((given & 0x00800000) == 0 ? "-" : ""), | |
327 | offset * 4, | |
328 | ((given & 0x00200000) != 0 ? "!" : "")); | |
329 | else | |
330 | func (stream, "]"); | |
331 | } | |
332 | else | |
333 | { | |
334 | int offset = given & 0xff; | |
335 | if (offset) | |
336 | func (stream, "], %s#%d", | |
337 | ((given & 0x00800000) == 0 ? "-" : ""), | |
338 | offset * 4); | |
339 | else | |
340 | func (stream, "]"); | |
341 | } | |
342 | break; | |
343 | ||
344 | case 'C': | |
345 | switch (given & 0x00090000) | |
346 | { | |
347 | default: | |
348 | func (stream, "_???"); | |
349 | break; | |
350 | case 0x90000: | |
351 | func (stream, "_all"); | |
352 | break; | |
353 | case 0x10000: | |
354 | func (stream, "_ctl"); | |
355 | break; | |
356 | case 0x80000: | |
357 | func (stream, "_flg"); | |
358 | break; | |
359 | } | |
360 | break; | |
361 | ||
362 | case 'F': | |
363 | switch (given & 0x00408000) | |
364 | { | |
365 | case 0: | |
366 | func (stream, "4"); | |
367 | break; | |
368 | case 0x8000: | |
369 | func (stream, "1"); | |
370 | break; | |
371 | case 0x00400000: | |
372 | func (stream, "2"); | |
373 | break; | |
374 | default: | |
375 | func (stream, "3"); | |
376 | } | |
377 | break; | |
378 | ||
379 | case 'P': | |
380 | switch (given & 0x00080080) | |
381 | { | |
382 | case 0: | |
383 | func (stream, "s"); | |
384 | break; | |
385 | case 0x80: | |
386 | func (stream, "d"); | |
387 | break; | |
388 | case 0x00080000: | |
389 | func (stream, "e"); | |
390 | break; | |
391 | default: | |
392 | func (stream, _("<illegal precision>")); | |
393 | break; | |
394 | } | |
395 | break; | |
396 | case 'Q': | |
397 | switch (given & 0x00408000) | |
398 | { | |
399 | case 0: | |
400 | func (stream, "s"); | |
401 | break; | |
402 | case 0x8000: | |
403 | func (stream, "d"); | |
404 | break; | |
405 | case 0x00400000: | |
406 | func (stream, "e"); | |
407 | break; | |
408 | default: | |
409 | func (stream, "p"); | |
410 | break; | |
411 | } | |
412 | break; | |
413 | case 'R': | |
414 | switch (given & 0x60) | |
415 | { | |
416 | case 0: | |
417 | break; | |
418 | case 0x20: | |
419 | func (stream, "p"); | |
420 | break; | |
421 | case 0x40: | |
422 | func (stream, "m"); | |
423 | break; | |
424 | default: | |
425 | func (stream, "z"); | |
426 | break; | |
427 | } | |
428 | break; | |
429 | ||
430 | case '0': case '1': case '2': case '3': case '4': | |
431 | case '5': case '6': case '7': case '8': case '9': | |
432 | { | |
433 | int bitstart = *c++ - '0'; | |
434 | int bitend = 0; | |
435 | while (*c >= '0' && *c <= '9') | |
436 | bitstart = (bitstart * 10) + *c++ - '0'; | |
437 | ||
438 | switch (*c) | |
439 | { | |
440 | case '-': | |
441 | c++; | |
442 | while (*c >= '0' && *c <= '9') | |
443 | bitend = (bitend * 10) + *c++ - '0'; | |
444 | if (!bitend) | |
445 | abort (); | |
446 | switch (*c) | |
447 | { | |
448 | case 'r': | |
449 | { | |
450 | long reg; | |
451 | reg = given >> bitstart; | |
452 | reg &= (2 << (bitend - bitstart)) - 1; | |
453 | func (stream, "%s", arm_regnames[reg]); | |
454 | } | |
455 | break; | |
456 | case 'd': | |
457 | { | |
458 | long reg; | |
459 | reg = given >> bitstart; | |
460 | reg &= (2 << (bitend - bitstart)) - 1; | |
461 | func (stream, "%d", reg); | |
462 | } | |
463 | break; | |
464 | case 'x': | |
465 | { | |
466 | long reg; | |
467 | reg = given >> bitstart; | |
468 | reg &= (2 << (bitend - bitstart)) - 1; | |
469 | func (stream, "0x%08x", reg); | |
470 | } | |
471 | break; | |
472 | case 'f': | |
473 | { | |
474 | long reg; | |
475 | reg = given >> bitstart; | |
476 | reg &= (2 << (bitend - bitstart)) - 1; | |
477 | if (reg > 7) | |
478 | func (stream, "#%s", | |
479 | arm_fp_const[reg & 7]); | |
480 | else | |
481 | func (stream, "f%d", reg); | |
482 | } | |
483 | break; | |
484 | default: | |
485 | abort (); | |
486 | } | |
487 | break; | |
488 | case '`': | |
489 | c++; | |
490 | if ((given & (1 << bitstart)) == 0) | |
491 | func (stream, "%c", *c); | |
492 | break; | |
493 | case '\'': | |
494 | c++; | |
495 | if ((given & (1 << bitstart)) != 0) | |
496 | func (stream, "%c", *c); | |
497 | break; | |
498 | case '?': | |
499 | ++c; | |
500 | if ((given & (1 << bitstart)) != 0) | |
501 | func (stream, "%c", *c++); | |
502 | else | |
503 | func (stream, "%c", *++c); | |
504 | break; | |
505 | default: | |
506 | abort (); | |
507 | } | |
508 | break; | |
509 | ||
510 | default: | |
511 | abort (); | |
512 | } | |
513 | } | |
514 | } | |
515 | else | |
516 | func (stream, "%c", *c); | |
517 | } | |
518 | return 4; | |
519 | } | |
520 | } | |
521 | abort (); | |
522 | } | |
523 | ||
524 | /* Print one instruction from PC on INFO->STREAM. | |
525 | Return the size of the instruction. */ | |
526 | ||
527 | static int | |
528 | print_insn_thumb (pc, info, given) | |
529 | bfd_vma pc; | |
530 | struct disassemble_info *info; | |
531 | long given; | |
532 | { | |
533 | struct thumb_opcode *insn; | |
534 | void *stream = info->stream; | |
535 | fprintf_ftype func = info->fprintf_func; | |
536 | ||
537 | for (insn = thumb_opcodes; insn->assembler; insn++) | |
538 | { | |
539 | if ((given & insn->mask) == insn->value) | |
540 | { | |
541 | char *c = insn->assembler; | |
542 | ||
543 | /* Special processing for Thumb 2 instruction BL sequence: */ | |
544 | if (!*c) /* check for empty (not NULL) assembler string */ | |
545 | { | |
546 | info->bytes_per_chunk = 4; | |
547 | info->bytes_per_line = 4; | |
548 | ||
549 | func (stream, "%04x\tbl\t", given & 0xffff); | |
550 | (*info->print_address_func) | |
551 | (BDISP23 (given) * 2 + pc + 4, info); | |
552 | return 4; | |
553 | } | |
554 | else | |
555 | { | |
556 | info->bytes_per_chunk = 2; | |
557 | info->bytes_per_line = 4; | |
558 | ||
559 | given &= 0xffff; | |
560 | func (stream, "%04x\t", given); | |
561 | for (; *c; c++) | |
562 | { | |
563 | if (*c == '%') | |
564 | { | |
565 | int domaskpc = 0; | |
566 | int domasklr = 0; | |
567 | switch (*++c) | |
568 | { | |
569 | case '%': | |
570 | func (stream, "%%"); | |
571 | break; | |
572 | ||
573 | case 'S': | |
574 | { | |
575 | long reg; | |
576 | reg = (given >> 3) & 0x7; | |
577 | if (given & (1 << 6)) | |
578 | reg += 8; | |
579 | func (stream, "%s", arm_regnames[reg]); | |
580 | } | |
581 | break; | |
582 | ||
583 | case 'D': | |
584 | { | |
585 | long reg; | |
586 | reg = given & 0x7; | |
587 | if (given & (1 << 7)) | |
588 | reg += 8; | |
589 | func (stream, "%s", arm_regnames[reg]); | |
590 | } | |
591 | break; | |
592 | ||
593 | case 'T': | |
594 | func (stream, "%s", | |
595 | arm_conditional [(given >> 8) & 0xf]); | |
596 | break; | |
597 | ||
598 | case 'N': | |
599 | if (given & (1 << 8)) | |
600 | domasklr = 1; | |
601 | /* fall through */ | |
602 | case 'O': | |
603 | if (*c == 'O' && (given & (1 << 8))) | |
604 | domaskpc = 1; | |
605 | /* fall through */ | |
606 | case 'M': | |
607 | { | |
608 | int started = 0; | |
609 | int reg; | |
610 | func (stream, "{"); | |
611 | /* It would be nice if we could spot | |
612 | ranges, and generate the rS-rE format: */ | |
613 | for (reg = 0; (reg < 8); reg++) | |
614 | if ((given & (1 << reg)) != 0) | |
615 | { | |
616 | if (started) | |
617 | func (stream, ", "); | |
618 | started = 1; | |
619 | func (stream, "%s", arm_regnames[reg]); | |
620 | } | |
621 | ||
622 | if (domasklr) | |
623 | { | |
624 | if (started) | |
625 | func (stream, ", "); | |
626 | started = 1; | |
627 | func (stream, "lr"); | |
628 | } | |
629 | ||
630 | if (domaskpc) | |
631 | { | |
632 | if (started) | |
633 | func (stream, ", "); | |
634 | func (stream, "pc"); | |
635 | } | |
636 | ||
637 | func (stream, "}"); | |
638 | } | |
639 | break; | |
640 | ||
641 | ||
642 | case '0': case '1': case '2': case '3': case '4': | |
643 | case '5': case '6': case '7': case '8': case '9': | |
644 | { | |
645 | int bitstart = *c++ - '0'; | |
646 | int bitend = 0; | |
647 | while (*c >= '0' && *c <= '9') | |
648 | bitstart = (bitstart * 10) + *c++ - '0'; | |
649 | ||
650 | switch (*c) | |
651 | { | |
652 | case '-': | |
653 | { | |
654 | long reg; | |
655 | c++; | |
656 | while (*c >= '0' && *c <= '9') | |
657 | bitend = (bitend * 10) + *c++ - '0'; | |
658 | if (!bitend) | |
659 | abort (); | |
660 | reg = given >> bitstart; | |
661 | reg &= (2 << (bitend - bitstart)) - 1; | |
662 | switch (*c) | |
663 | { | |
664 | case 'r': | |
665 | func (stream, "%s", arm_regnames[reg]); | |
666 | break; | |
667 | ||
668 | case 'd': | |
669 | func (stream, "%d", reg); | |
670 | break; | |
671 | ||
672 | case 'H': | |
673 | func (stream, "%d", reg << 1); | |
674 | break; | |
675 | ||
676 | case 'W': | |
677 | func (stream, "%d", reg << 2); | |
678 | break; | |
679 | ||
680 | case 'a': | |
681 | /* PC-relative address -- the bottom two | |
682 | bits of the address are dropped before | |
683 | the calculation. */ | |
684 | info->print_address_func | |
685 | (((pc + 4) & ~3) + (reg << 2), info); | |
686 | break; | |
687 | ||
688 | case 'x': | |
689 | func (stream, "0x%04x", reg); | |
690 | break; | |
691 | ||
692 | case 'I': | |
693 | reg = ((reg ^ (1 << bitend)) - (1 << bitend)); | |
694 | func (stream, "%d", reg); | |
695 | break; | |
696 | ||
697 | case 'B': | |
698 | reg = ((reg ^ (1 << bitend)) - (1 << bitend)); | |
699 | (*info->print_address_func) | |
700 | (reg * 2 + pc + 4, info); | |
701 | break; | |
702 | ||
703 | default: | |
704 | abort(); | |
705 | } | |
706 | } | |
707 | break; | |
708 | ||
709 | case '\'': | |
710 | c++; | |
711 | if ((given & (1 << bitstart)) != 0) | |
712 | func (stream, "%c", *c); | |
713 | break; | |
714 | ||
715 | case '?': | |
716 | ++c; | |
717 | if ((given & (1 << bitstart)) != 0) | |
718 | func (stream, "%c", *c++); | |
719 | else | |
720 | func (stream, "%c", *++c); | |
721 | break; | |
722 | ||
723 | default: | |
724 | abort(); | |
725 | } | |
726 | } | |
727 | break; | |
728 | ||
729 | default: | |
730 | abort (); | |
731 | } | |
732 | } | |
733 | else | |
734 | func (stream, "%c", *c); | |
735 | } | |
736 | } | |
737 | return 2; | |
738 | } | |
739 | } | |
740 | ||
741 | /* no match */ | |
742 | abort (); | |
743 | } | |
744 | ||
745 | /* NOTE: There are no checks in these routines that the relevant number of data bytes exist */ | |
746 | ||
747 | int | |
748 | print_insn_big_arm (pc, info) | |
749 | bfd_vma pc; | |
750 | struct disassemble_info *info; | |
751 | { | |
752 | unsigned char b[4]; | |
753 | long given; | |
754 | int status; | |
755 | coff_symbol_type *cs; | |
756 | elf_symbol_type *es; | |
757 | int is_thumb; | |
758 | ||
759 | is_thumb = false; | |
760 | if (info->symbols != NULL) | |
761 | { | |
762 | if (bfd_asymbol_flavour (*info->symbols) == bfd_target_coff_flavour) | |
763 | { | |
764 | cs = coffsymbol (*info->symbols); | |
765 | is_thumb = (cs->native->u.syment.n_sclass == C_THUMBEXT | |
766 | || cs->native->u.syment.n_sclass == C_THUMBSTAT | |
767 | || cs->native->u.syment.n_sclass == C_THUMBLABEL | |
768 | || cs->native->u.syment.n_sclass == C_THUMBEXTFUNC | |
769 | || cs->native->u.syment.n_sclass == C_THUMBSTATFUNC); | |
770 | ||
771 | } | |
772 | else if (bfd_asymbol_flavour (*info->symbols) == bfd_target_elf_flavour) | |
773 | { | |
774 | es = *(elf_symbol_type **)(info->symbols); | |
775 | is_thumb = ELF_ST_TYPE (es->internal_elf_sym.st_info) == | |
776 | STT_ARM_TFUNC; | |
777 | } | |
778 | } | |
779 | ||
780 | info->bytes_per_chunk = 4; | |
781 | info->display_endian = BFD_ENDIAN_BIG; | |
782 | ||
783 | /* Always fetch word aligned values. */ | |
784 | ||
785 | status = (*info->read_memory_func) (pc & ~ 0x3, (bfd_byte *) &b[0], 4, info); | |
786 | if (status != 0) | |
787 | { | |
788 | (*info->memory_error_func) (status, pc, info); | |
789 | return -1; | |
790 | } | |
791 | ||
792 | if (is_thumb) | |
793 | { | |
794 | if (pc & 0x2) | |
795 | { | |
796 | given = (b[2] << 8) | b[3]; | |
797 | ||
798 | status = info->read_memory_func ((pc + 4) & ~ 0x3, (bfd_byte *) b, 4, info); | |
799 | if (status != 0) | |
800 | { | |
801 | info->memory_error_func (status, pc + 4, info); | |
802 | return -1; | |
803 | } | |
804 | ||
805 | given |= (b[0] << 24) | (b[1] << 16); | |
806 | } | |
807 | else | |
808 | { | |
809 | given = (b[0] << 8) | b[1] | (b[2] << 24) | (b[3] << 16); | |
810 | } | |
811 | } | |
812 | else | |
813 | { | |
814 | given = (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | (b[3]); | |
815 | } | |
816 | ||
817 | if (is_thumb) | |
818 | { | |
819 | status = print_insn_thumb (pc, info, given); | |
820 | } | |
821 | else | |
822 | { | |
823 | status = print_insn_arm (pc, info, given); | |
824 | } | |
825 | ||
826 | return status; | |
827 | } | |
828 | ||
829 | int | |
830 | print_insn_little_arm (pc, info) | |
831 | bfd_vma pc; | |
832 | struct disassemble_info * info; | |
833 | { | |
834 | unsigned char b[4]; | |
835 | long given; | |
836 | int status; | |
837 | coff_symbol_type *cs; | |
838 | elf_symbol_type *es; | |
839 | int is_thumb; | |
840 | ||
841 | is_thumb = false; | |
842 | if (info->symbols != NULL) | |
843 | { | |
844 | if (bfd_asymbol_flavour (*info->symbols) == bfd_target_coff_flavour) | |
845 | { | |
846 | cs = coffsymbol (*info->symbols); | |
847 | is_thumb = (cs->native->u.syment.n_sclass == C_THUMBEXT | |
848 | || cs->native->u.syment.n_sclass == C_THUMBSTAT | |
849 | || cs->native->u.syment.n_sclass == C_THUMBLABEL | |
850 | || cs->native->u.syment.n_sclass == C_THUMBEXTFUNC | |
851 | || cs->native->u.syment.n_sclass == C_THUMBSTATFUNC); | |
852 | ||
853 | } | |
854 | else if (bfd_asymbol_flavour (*info->symbols) == bfd_target_elf_flavour) | |
855 | { | |
856 | es = *(elf_symbol_type **)(info->symbols); | |
857 | is_thumb = ELF_ST_TYPE (es->internal_elf_sym.st_info) == | |
858 | STT_ARM_TFUNC; | |
859 | } | |
860 | } | |
861 | ||
862 | info->bytes_per_chunk = 4; | |
863 | info->display_endian = BFD_ENDIAN_LITTLE; | |
864 | ||
865 | status = (*info->read_memory_func) (pc, (bfd_byte *) &b[0], 4, info); | |
866 | if (status != 0 && is_thumb) | |
867 | { | |
868 | info->bytes_per_chunk = 2; | |
869 | ||
870 | status = info->read_memory_func (pc, (bfd_byte *) b, 2, info); | |
871 | b[3] = b[2] = 0; | |
872 | } | |
873 | if (status != 0) | |
874 | { | |
875 | (*info->memory_error_func) (status, pc, info); | |
876 | return -1; | |
877 | } | |
878 | ||
879 | given = (b[0]) | (b[1] << 8) | (b[2] << 16) | (b[3] << 24); | |
880 | ||
881 | if (is_thumb) | |
882 | { | |
883 | status = print_insn_thumb (pc, info, given); | |
884 | } | |
885 | else | |
886 | { | |
887 | status = print_insn_arm (pc, info, given); | |
888 | } | |
889 | ||
890 | return status; | |
891 | } |