Commit | Line | Data |
---|---|---|
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); | |
198 | if ((given & 0x00800000) == 0) | |
199 | offset = -offset; | |
200 | (*info->print_address_func) | |
201 | (offset + pc + 8, info); | |
202 | } | |
203 | else | |
204 | { | |
205 | func (stream, "[%s", | |
206 | arm_regnames[(given >> 16) & 0xf]); | |
207 | if ((given & 0x01000000) != 0) | |
208 | { | |
209 | /* pre-indexed */ | |
210 | if ((given & 0x00400000) == 0x00400000) | |
211 | { | |
212 | /* immediate */ | |
213 | int offset = ((given & 0xf00) >> 4) | (given & 0xf); | |
214 | if (offset) | |
215 | func (stream, ", %s#%d", | |
216 | (((given & 0x00800000) == 0) | |
217 | ? "-" : ""), offset); | |
218 | } | |
219 | else | |
220 | { | |
221 | /* register */ | |
222 | func (stream, ", %s%s", | |
223 | (((given & 0x00800000) == 0) | |
224 | ? "-" : ""), | |
225 | arm_regnames[given & 0xf]); | |
226 | } | |
227 | ||
228 | func (stream, "]%s", | |
229 | ((given & 0x00200000) != 0) ? "!" : ""); | |
230 | } | |
231 | else | |
232 | { | |
233 | /* post-indexed */ | |
234 | if ((given & 0x00400000) == 0x00400000) | |
235 | { | |
236 | /* immediate */ | |
237 | int offset = ((given & 0xf00) >> 4) | (given & 0xf); | |
238 | if (offset) | |
239 | func (stream, "], %s#%d", | |
240 | (((given & 0x00800000) == 0) | |
241 | ? "-" : ""), offset); | |
242 | else | |
243 | func (stream, "]"); | |
244 | } | |
245 | else | |
246 | { | |
247 | /* register */ | |
248 | func (stream, "], %s%s", | |
249 | (((given & 0x00800000) == 0) | |
250 | ? "-" : ""), | |
251 | arm_regnames[given & 0xf]); | |
252 | } | |
253 | } | |
254 | } | |
255 | break; | |
256 | ||
257 | case 'b': | |
258 | (*info->print_address_func) | |
259 | (BDISP (given) * 4 + pc + 8, info); | |
260 | break; | |
261 | ||
262 | case 'c': | |
263 | func (stream, "%s", | |
264 | arm_conditional [(given >> 28) & 0xf]); | |
265 | break; | |
266 | ||
267 | case 'm': | |
268 | { | |
269 | int started = 0; | |
270 | int reg; | |
271 | ||
272 | func (stream, "{"); | |
273 | for (reg = 0; reg < 16; reg++) | |
274 | if ((given & (1 << reg)) != 0) | |
275 | { | |
276 | if (started) | |
277 | func (stream, ", "); | |
278 | started = 1; | |
279 | func (stream, "%s", arm_regnames[reg]); | |
280 | } | |
281 | func (stream, "}"); | |
282 | } | |
283 | break; | |
284 | ||
285 | case 'o': | |
286 | if ((given & 0x02000000) != 0) | |
287 | { | |
288 | int rotate = (given & 0xf00) >> 7; | |
289 | int immed = (given & 0xff); | |
290 | func (stream, "#%d", | |
291 | ((immed << (32 - rotate)) | |
292 | | (immed >> rotate)) & 0xffffffff); | |
293 | } | |
294 | else | |
295 | arm_decode_shift (given, func, stream); | |
296 | break; | |
297 | ||
298 | case 'p': | |
299 | if ((given & 0x0000f000) == 0x0000f000) | |
300 | func (stream, "p"); | |
301 | break; | |
302 | ||
303 | case 't': | |
304 | if ((given & 0x01200000) == 0x00200000) | |
305 | func (stream, "t"); | |
306 | break; | |
307 | ||
308 | case 'h': | |
309 | if ((given & 0x00000020) == 0x00000020) | |
310 | func (stream, "h"); | |
311 | else | |
312 | func (stream, "b"); | |
313 | break; | |
314 | ||
315 | case 'A': | |
316 | func (stream, "[%s", arm_regnames [(given >> 16) & 0xf]); | |
317 | if ((given & 0x01000000) != 0) | |
318 | { | |
319 | int offset = given & 0xff; | |
320 | if (offset) | |
321 | func (stream, ", %s#%d]%s", | |
322 | ((given & 0x00800000) == 0 ? "-" : ""), | |
323 | offset * 4, | |
324 | ((given & 0x00200000) != 0 ? "!" : "")); | |
325 | else | |
326 | func (stream, "]"); | |
327 | } | |
328 | else | |
329 | { | |
330 | int offset = given & 0xff; | |
331 | if (offset) | |
332 | func (stream, "], %s#%d", | |
333 | ((given & 0x00800000) == 0 ? "-" : ""), | |
334 | offset * 4); | |
335 | else | |
336 | func (stream, "]"); | |
337 | } | |
338 | break; | |
339 | ||
340 | case 'C': | |
341 | switch (given & 0x00090000) | |
342 | { | |
343 | default: | |
344 | func (stream, "_???"); | |
345 | break; | |
346 | case 0x90000: | |
347 | func (stream, "_all"); | |
348 | break; | |
349 | case 0x10000: | |
350 | func (stream, "_ctl"); | |
351 | break; | |
352 | case 0x80000: | |
353 | func (stream, "_flg"); | |
354 | break; | |
355 | } | |
356 | break; | |
357 | ||
358 | case 'F': | |
359 | switch (given & 0x00408000) | |
360 | { | |
361 | case 0: | |
362 | func (stream, "4"); | |
363 | break; | |
364 | case 0x8000: | |
365 | func (stream, "1"); | |
366 | break; | |
367 | case 0x00400000: | |
368 | func (stream, "2"); | |
369 | break; | |
370 | default: | |
371 | func (stream, "3"); | |
372 | } | |
373 | break; | |
374 | ||
375 | case 'P': | |
376 | switch (given & 0x00080080) | |
377 | { | |
378 | case 0: | |
379 | func (stream, "s"); | |
380 | break; | |
381 | case 0x80: | |
382 | func (stream, "d"); | |
383 | break; | |
384 | case 0x00080000: | |
385 | func (stream, "e"); | |
386 | break; | |
387 | default: | |
388 | func (stream, _("<illegal precision>")); | |
389 | break; | |
390 | } | |
391 | break; | |
392 | case 'Q': | |
393 | switch (given & 0x00408000) | |
394 | { | |
395 | case 0: | |
396 | func (stream, "s"); | |
397 | break; | |
398 | case 0x8000: | |
399 | func (stream, "d"); | |
400 | break; | |
401 | case 0x00400000: | |
402 | func (stream, "e"); | |
403 | break; | |
404 | default: | |
405 | func (stream, "p"); | |
406 | break; | |
407 | } | |
408 | break; | |
409 | case 'R': | |
410 | switch (given & 0x60) | |
411 | { | |
412 | case 0: | |
413 | break; | |
414 | case 0x20: | |
415 | func (stream, "p"); | |
416 | break; | |
417 | case 0x40: | |
418 | func (stream, "m"); | |
419 | break; | |
420 | default: | |
421 | func (stream, "z"); | |
422 | break; | |
423 | } | |
424 | break; | |
425 | ||
426 | case '0': case '1': case '2': case '3': case '4': | |
427 | case '5': case '6': case '7': case '8': case '9': | |
428 | { | |
429 | int bitstart = *c++ - '0'; | |
430 | int bitend = 0; | |
431 | while (*c >= '0' && *c <= '9') | |
432 | bitstart = (bitstart * 10) + *c++ - '0'; | |
433 | ||
434 | switch (*c) | |
435 | { | |
436 | case '-': | |
437 | c++; | |
438 | while (*c >= '0' && *c <= '9') | |
439 | bitend = (bitend * 10) + *c++ - '0'; | |
440 | if (!bitend) | |
441 | abort (); | |
442 | switch (*c) | |
443 | { | |
444 | case 'r': | |
445 | { | |
446 | long reg; | |
447 | reg = given >> bitstart; | |
448 | reg &= (2 << (bitend - bitstart)) - 1; | |
449 | func (stream, "%s", arm_regnames[reg]); | |
450 | } | |
451 | break; | |
452 | case 'd': | |
453 | { | |
454 | long reg; | |
455 | reg = given >> bitstart; | |
456 | reg &= (2 << (bitend - bitstart)) - 1; | |
457 | func (stream, "%d", reg); | |
458 | } | |
459 | break; | |
460 | case 'x': | |
461 | { | |
462 | long reg; | |
463 | reg = given >> bitstart; | |
464 | reg &= (2 << (bitend - bitstart)) - 1; | |
465 | func (stream, "0x%08x", reg); | |
466 | } | |
467 | break; | |
468 | case 'f': | |
469 | { | |
470 | long reg; | |
471 | reg = given >> bitstart; | |
472 | reg &= (2 << (bitend - bitstart)) - 1; | |
473 | if (reg > 7) | |
474 | func (stream, "#%s", | |
475 | arm_fp_const[reg & 7]); | |
476 | else | |
477 | func (stream, "f%d", reg); | |
478 | } | |
479 | break; | |
480 | default: | |
481 | abort (); | |
482 | } | |
483 | break; | |
484 | case '`': | |
485 | c++; | |
486 | if ((given & (1 << bitstart)) == 0) | |
487 | func (stream, "%c", *c); | |
488 | break; | |
489 | case '\'': | |
490 | c++; | |
491 | if ((given & (1 << bitstart)) != 0) | |
492 | func (stream, "%c", *c); | |
493 | break; | |
494 | case '?': | |
495 | ++c; | |
496 | if ((given & (1 << bitstart)) != 0) | |
497 | func (stream, "%c", *c++); | |
498 | else | |
499 | func (stream, "%c", *++c); | |
500 | break; | |
501 | default: | |
502 | abort (); | |
503 | } | |
504 | break; | |
505 | ||
506 | default: | |
507 | abort (); | |
508 | } | |
509 | } | |
510 | } | |
511 | else | |
512 | func (stream, "%c", *c); | |
513 | } | |
514 | return 4; | |
515 | } | |
516 | } | |
517 | abort (); | |
518 | } | |
519 | ||
520 | /* Print one instruction from PC on INFO->STREAM. | |
521 | Return the size of the instruction. */ | |
522 | ||
523 | static int | |
524 | print_insn_thumb (pc, info, given) | |
525 | bfd_vma pc; | |
526 | struct disassemble_info *info; | |
527 | long given; | |
528 | { | |
529 | struct thumb_opcode *insn; | |
530 | void *stream = info->stream; | |
531 | fprintf_ftype func = info->fprintf_func; | |
532 | ||
533 | for (insn = thumb_opcodes; insn->assembler; insn++) | |
534 | { | |
535 | if ((given & insn->mask) == insn->value) | |
536 | { | |
537 | char *c = insn->assembler; | |
538 | ||
539 | /* Special processing for Thumb 2 instruction BL sequence: */ | |
540 | if (!*c) /* check for empty (not NULL) assembler string */ | |
541 | { | |
542 | info->bytes_per_chunk = 4; | |
543 | info->bytes_per_line = 4; | |
544 | ||
545 | func (stream, "%04x\tbl\t", given & 0xffff); | |
546 | (*info->print_address_func) | |
547 | (BDISP23 (given) * 2 + pc + 4, info); | |
548 | return 4; | |
549 | } | |
550 | else | |
551 | { | |
552 | info->bytes_per_chunk = 2; | |
553 | info->bytes_per_line = 4; | |
554 | ||
555 | given &= 0xffff; | |
556 | func (stream, "%04x\t", given); | |
557 | for (; *c; c++) | |
558 | { | |
559 | if (*c == '%') | |
560 | { | |
561 | int domaskpc = 0; | |
562 | int domasklr = 0; | |
563 | switch (*++c) | |
564 | { | |
565 | case '%': | |
566 | func (stream, "%%"); | |
567 | break; | |
568 | ||
569 | case 'S': | |
570 | { | |
571 | long reg; | |
572 | reg = (given >> 3) & 0x7; | |
573 | if (given & (1 << 6)) | |
574 | reg += 8; | |
575 | func (stream, "%s", arm_regnames[reg]); | |
576 | } | |
577 | break; | |
578 | ||
579 | case 'D': | |
580 | { | |
581 | long reg; | |
582 | reg = given & 0x7; | |
583 | if (given & (1 << 7)) | |
584 | reg += 8; | |
585 | func (stream, "%s", arm_regnames[reg]); | |
586 | } | |
587 | break; | |
588 | ||
589 | case 'T': | |
590 | func (stream, "%s", | |
591 | arm_conditional [(given >> 8) & 0xf]); | |
592 | break; | |
593 | ||
594 | case 'N': | |
595 | if (given & (1 << 8)) | |
596 | domasklr = 1; | |
597 | /* fall through */ | |
598 | case 'O': | |
599 | if (*c == 'O' && (given & (1 << 8))) | |
600 | domaskpc = 1; | |
601 | /* fall through */ | |
602 | case 'M': | |
603 | { | |
604 | int started = 0; | |
605 | int reg; | |
606 | func (stream, "{"); | |
607 | /* It would be nice if we could spot | |
608 | ranges, and generate the rS-rE format: */ | |
609 | for (reg = 0; (reg < 8); reg++) | |
610 | if ((given & (1 << reg)) != 0) | |
611 | { | |
612 | if (started) | |
613 | func (stream, ", "); | |
614 | started = 1; | |
615 | func (stream, "%s", arm_regnames[reg]); | |
616 | } | |
617 | ||
618 | if (domasklr) | |
619 | { | |
620 | if (started) | |
621 | func (stream, ", "); | |
622 | started = 1; | |
623 | func (stream, "lr"); | |
624 | } | |
625 | ||
626 | if (domaskpc) | |
627 | { | |
628 | if (started) | |
629 | func (stream, ", "); | |
630 | func (stream, "pc"); | |
631 | } | |
632 | ||
633 | func (stream, "}"); | |
634 | } | |
635 | break; | |
636 | ||
637 | ||
638 | case '0': case '1': case '2': case '3': case '4': | |
639 | case '5': case '6': case '7': case '8': case '9': | |
640 | { | |
641 | int bitstart = *c++ - '0'; | |
642 | int bitend = 0; | |
643 | while (*c >= '0' && *c <= '9') | |
644 | bitstart = (bitstart * 10) + *c++ - '0'; | |
645 | ||
646 | switch (*c) | |
647 | { | |
648 | case '-': | |
649 | { | |
650 | long reg; | |
651 | c++; | |
652 | while (*c >= '0' && *c <= '9') | |
653 | bitend = (bitend * 10) + *c++ - '0'; | |
654 | if (!bitend) | |
655 | abort (); | |
656 | reg = given >> bitstart; | |
657 | reg &= (2 << (bitend - bitstart)) - 1; | |
658 | switch (*c) | |
659 | { | |
660 | case 'r': | |
661 | func (stream, "%s", arm_regnames[reg]); | |
662 | break; | |
663 | ||
664 | case 'd': | |
665 | func (stream, "%d", reg); | |
666 | break; | |
667 | ||
668 | case 'H': | |
669 | func (stream, "%d", reg << 1); | |
670 | break; | |
671 | ||
672 | case 'W': | |
673 | func (stream, "%d", reg << 2); | |
674 | break; | |
675 | ||
676 | case 'a': | |
677 | /* PC-relative address -- the bottom two | |
678 | bits of the address are dropped before | |
679 | the calculation. */ | |
680 | info->print_address_func | |
681 | (((pc + 4) & ~3) + (reg << 2), info); | |
682 | break; | |
683 | ||
684 | case 'x': | |
685 | func (stream, "0x%04x", reg); | |
686 | break; | |
687 | ||
688 | case 'I': | |
689 | reg = ((reg ^ (1 << bitend)) - (1 << bitend)); | |
690 | func (stream, "%d", reg); | |
691 | break; | |
692 | ||
693 | case 'B': | |
694 | reg = ((reg ^ (1 << bitend)) - (1 << bitend)); | |
695 | (*info->print_address_func) | |
696 | (reg * 2 + pc + 4, info); | |
697 | break; | |
698 | ||
699 | default: | |
700 | abort(); | |
701 | } | |
702 | } | |
703 | break; | |
704 | ||
705 | case '\'': | |
706 | c++; | |
707 | if ((given & (1 << bitstart)) != 0) | |
708 | func (stream, "%c", *c); | |
709 | break; | |
710 | ||
711 | case '?': | |
712 | ++c; | |
713 | if ((given & (1 << bitstart)) != 0) | |
714 | func (stream, "%c", *c++); | |
715 | else | |
716 | func (stream, "%c", *++c); | |
717 | break; | |
718 | ||
719 | default: | |
720 | abort(); | |
721 | } | |
722 | } | |
723 | break; | |
724 | ||
725 | default: | |
726 | abort (); | |
727 | } | |
728 | } | |
729 | else | |
730 | func (stream, "%c", *c); | |
731 | } | |
732 | } | |
733 | return 2; | |
734 | } | |
735 | } | |
736 | ||
737 | /* no match */ | |
738 | abort (); | |
739 | } | |
740 | ||
741 | /* NOTE: There are no checks in these routines that the relevant number of data bytes exist */ | |
742 | ||
743 | int | |
744 | print_insn_big_arm (pc, info) | |
745 | bfd_vma pc; | |
746 | struct disassemble_info *info; | |
747 | { | |
748 | unsigned char b[4]; | |
749 | long given; | |
750 | int status; | |
751 | coff_symbol_type *cs; | |
752 | elf_symbol_type *es; | |
753 | int is_thumb; | |
754 | ||
755 | is_thumb = false; | |
756 | if (info->symbols != NULL) | |
757 | { | |
758 | if (bfd_asymbol_flavour (*info->symbols) == bfd_target_coff_flavour) | |
759 | { | |
760 | cs = coffsymbol (*info->symbols); | |
761 | is_thumb = (cs->native->u.syment.n_sclass == C_THUMBEXT | |
762 | || cs->native->u.syment.n_sclass == C_THUMBSTAT | |
763 | || cs->native->u.syment.n_sclass == C_THUMBLABEL | |
764 | || cs->native->u.syment.n_sclass == C_THUMBEXTFUNC | |
765 | || cs->native->u.syment.n_sclass == C_THUMBSTATFUNC); | |
766 | ||
767 | } | |
768 | else if (bfd_asymbol_flavour (*info->symbols) == bfd_target_elf_flavour) | |
769 | { | |
770 | es = *(elf_symbol_type **)(info->symbols); | |
771 | is_thumb = ELF_ST_TYPE (es->internal_elf_sym.st_info) == | |
772 | STT_ARM_TFUNC; | |
773 | } | |
774 | } | |
775 | ||
776 | info->bytes_per_chunk = 4; | |
777 | info->display_endian = BFD_ENDIAN_BIG; | |
778 | ||
779 | /* Always fetch word aligned values. */ | |
780 | ||
781 | status = (*info->read_memory_func) (pc & ~ 0x3, (bfd_byte *) &b[0], 4, info); | |
782 | if (status != 0) | |
783 | { | |
784 | (*info->memory_error_func) (status, pc, info); | |
785 | return -1; | |
786 | } | |
787 | ||
788 | if (is_thumb) | |
789 | { | |
790 | if (pc & 0x2) | |
791 | { | |
792 | given = (b[2] << 8) | b[3]; | |
793 | ||
794 | status = info->read_memory_func ((pc + 4) & ~ 0x3, (bfd_byte *) b, 4, info); | |
795 | if (status != 0) | |
796 | { | |
797 | info->memory_error_func (status, pc + 4, info); | |
798 | return -1; | |
799 | } | |
800 | ||
801 | given |= (b[0] << 24) | (b[1] << 16); | |
802 | } | |
803 | else | |
804 | { | |
805 | given = (b[0] << 8) | b[1] | (b[2] << 24) | (b[3] << 16); | |
806 | } | |
807 | } | |
808 | else | |
809 | { | |
810 | given = (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | (b[3]); | |
811 | } | |
812 | ||
813 | if (is_thumb) | |
814 | { | |
815 | status = print_insn_thumb (pc, info, given); | |
816 | } | |
817 | else | |
818 | { | |
819 | status = print_insn_arm (pc, info, given); | |
820 | } | |
821 | ||
822 | return status; | |
823 | } | |
824 | ||
825 | int | |
826 | print_insn_little_arm (pc, info) | |
827 | bfd_vma pc; | |
828 | struct disassemble_info * info; | |
829 | { | |
830 | unsigned char b[4]; | |
831 | long given; | |
832 | int status; | |
833 | coff_symbol_type *cs; | |
834 | elf_symbol_type *es; | |
835 | int is_thumb; | |
836 | ||
837 | is_thumb = false; | |
838 | if (info->symbols != NULL) | |
839 | { | |
840 | if (bfd_asymbol_flavour (*info->symbols) == bfd_target_coff_flavour) | |
841 | { | |
842 | cs = coffsymbol (*info->symbols); | |
843 | is_thumb = (cs->native->u.syment.n_sclass == C_THUMBEXT | |
844 | || cs->native->u.syment.n_sclass == C_THUMBSTAT | |
845 | || cs->native->u.syment.n_sclass == C_THUMBLABEL | |
846 | || cs->native->u.syment.n_sclass == C_THUMBEXTFUNC | |
847 | || cs->native->u.syment.n_sclass == C_THUMBSTATFUNC); | |
848 | ||
849 | } | |
850 | else if (bfd_asymbol_flavour (*info->symbols) == bfd_target_elf_flavour) | |
851 | { | |
852 | es = *(elf_symbol_type **)(info->symbols); | |
853 | is_thumb = ELF_ST_TYPE (es->internal_elf_sym.st_info) == | |
854 | STT_ARM_TFUNC; | |
855 | } | |
856 | } | |
857 | ||
858 | info->bytes_per_chunk = 4; | |
859 | info->display_endian = BFD_ENDIAN_LITTLE; | |
860 | ||
861 | status = (*info->read_memory_func) (pc, (bfd_byte *) &b[0], 4, info); | |
862 | if (status != 0 && is_thumb) | |
863 | { | |
864 | info->bytes_per_chunk = 2; | |
865 | ||
866 | status = info->read_memory_func (pc, (bfd_byte *) b, 2, info); | |
867 | b[3] = b[2] = 0; | |
868 | } | |
869 | if (status != 0) | |
870 | { | |
871 | (*info->memory_error_func) (status, pc, info); | |
872 | return -1; | |
873 | } | |
874 | ||
875 | given = (b[0]) | (b[1] << 8) | (b[2] << 16) | (b[3] << 24); | |
876 | ||
877 | if (is_thumb) | |
878 | { | |
879 | status = print_insn_thumb (pc, info, given); | |
880 | } | |
881 | else | |
882 | { | |
883 | status = print_insn_arm (pc, info, given); | |
884 | } | |
885 | ||
886 | return status; | |
887 | } |