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1 | /* C-SKY disassembler. | |
2 | Copyright (C) 1988-2024 Free Software Foundation, Inc. | |
3 | Contributed by C-SKY Microsystems and Mentor Graphics. | |
4 | ||
5 | This file is part of the GNU opcodes library. | |
6 | ||
7 | This library 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 3, or (at your option) | |
10 | any later version. | |
11 | ||
12 | It is distributed in the hope that it will be useful, but WITHOUT | |
13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | License for more details. | |
16 | ||
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., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
21 | ||
22 | #include "sysdep.h" | |
23 | #include "config.h" | |
24 | #include <stdio.h> | |
25 | #include <stdint.h> | |
26 | #include <elf/csky.h> | |
27 | #include "disassemble.h" | |
28 | #include "elf-bfd.h" | |
29 | #include "opcode/csky.h" | |
30 | #include "libiberty.h" | |
31 | #include "csky-opc.h" | |
32 | #include "floatformat.h" | |
33 | ||
34 | #define CSKY_INST_TYPE unsigned long | |
35 | #define HAS_SUB_OPERAND (unsigned int)0xffffffff | |
36 | #define CSKY_DEFAULT_ISA 0xffffffff | |
37 | ||
38 | enum sym_type | |
39 | { | |
40 | CUR_TEXT, | |
41 | CUR_DATA | |
42 | }; | |
43 | ||
44 | struct csky_dis_info | |
45 | { | |
46 | /* Mem to disassemble. */ | |
47 | bfd_vma mem; | |
48 | /* Disassemble info. */ | |
49 | disassemble_info *info; | |
50 | /* Opcode information. */ | |
51 | struct csky_opcode_info const *opinfo; | |
52 | uint64_t isa; | |
53 | /* The value of operand to show. */ | |
54 | int value; | |
55 | /* Whether to look up/print a symbol name. */ | |
56 | int need_output_symbol; | |
57 | } dis_info; | |
58 | ||
59 | ||
60 | enum sym_type last_type; | |
61 | int last_map_sym = 1; | |
62 | bfd_vma last_map_addr = 0; | |
63 | int using_abi = 0; | |
64 | ||
65 | /* Only for objdump tool. */ | |
66 | #define INIT_MACH_FLAG 0xffffffff | |
67 | #define BINARY_MACH_FLAG 0x0 | |
68 | ||
69 | static unsigned int mach_flag = INIT_MACH_FLAG; | |
70 | ||
71 | static void | |
72 | print_insn_data (bfd_vma pc ATTRIBUTE_UNUSED, | |
73 | struct disassemble_info *info, | |
74 | long given) | |
75 | { | |
76 | switch (info->bytes_per_chunk) | |
77 | { | |
78 | case 1: | |
79 | info->fprintf_func (info->stream, ".byte\t0x%02lx", given); | |
80 | break; | |
81 | case 2: | |
82 | info->fprintf_func (info->stream, ".short\t0x%04lx", given); | |
83 | break; | |
84 | case 4: | |
85 | info->fprintf_func (info->stream, ".long\t0x%08lx", given); | |
86 | break; | |
87 | default: | |
88 | abort (); | |
89 | } | |
90 | } | |
91 | ||
92 | static int | |
93 | get_sym_code_type (struct disassemble_info *info, | |
94 | int n, | |
95 | enum sym_type *sym_type) | |
96 | { | |
97 | const char *name; | |
98 | name = bfd_asymbol_name (info->symtab[n]); | |
99 | if (name[0] == '$' && (name[1] == 't' || name[1] == 'd') | |
100 | && (name[2] == 0 || name[2] == '.')) | |
101 | { | |
102 | *sym_type = ((name[1] == 't') ? CUR_TEXT : CUR_DATA); | |
103 | return true; | |
104 | } | |
105 | return false; | |
106 | } | |
107 | ||
108 | static int | |
109 | csky_get_operand_mask (struct operand const *oprnd) | |
110 | { | |
111 | int mask = 0; | |
112 | if (oprnd->mask == HAS_SUB_OPERAND) | |
113 | { | |
114 | struct soperand *sop = (struct soperand *)oprnd; | |
115 | mask |= csky_get_operand_mask (&sop->subs[0]); | |
116 | mask |= csky_get_operand_mask (&sop->subs[1]); | |
117 | return mask; | |
118 | } | |
119 | return oprnd->mask; | |
120 | } | |
121 | ||
122 | static int | |
123 | csky_get_mask (struct csky_opcode_info const *pinfo) | |
124 | { | |
125 | int i = 0; | |
126 | int mask = 0; | |
127 | /* List type. */ | |
128 | if (pinfo->operand_num == -1) | |
129 | mask |= csky_get_operand_mask (&pinfo->oprnd.oprnds[i]); | |
130 | else | |
131 | for (; i < pinfo->operand_num; i++) | |
132 | mask |= csky_get_operand_mask (&pinfo->oprnd.oprnds[i]); | |
133 | ||
134 | mask = ~mask; | |
135 | return mask; | |
136 | } | |
137 | ||
138 | static unsigned int | |
139 | csky_chars_to_number (unsigned char * buf, int n) | |
140 | { | |
141 | int i; | |
142 | unsigned int val = 0; | |
143 | ||
144 | if (dis_info.info->endian == BFD_ENDIAN_BIG) | |
145 | for (i = 0; i < n; i++) | |
146 | val = val << 8 | buf[i]; | |
147 | else | |
148 | for (i = n - 1; i >= 0; i--) | |
149 | val = val << 8 | buf[i]; | |
150 | return val; | |
151 | } | |
152 | ||
153 | static struct csky_opcode const *g_opcodeP; | |
154 | ||
155 | static struct csky_opcode const * | |
156 | csky_find_inst_info (struct csky_opcode_info const **pinfo, | |
157 | CSKY_INST_TYPE inst, int length) | |
158 | { | |
159 | int i; | |
160 | unsigned int mask; | |
161 | struct csky_opcode const *p; | |
162 | ||
163 | p = g_opcodeP; | |
164 | while (p->mnemonic) | |
165 | { | |
166 | if (!(p->isa_flag16 & dis_info.isa) | |
167 | && !(p->isa_flag32 & dis_info.isa)) | |
168 | { | |
169 | p++; | |
170 | continue; | |
171 | } | |
172 | ||
173 | /* Get the opcode mask. */ | |
174 | for (i = 0; i < OP_TABLE_NUM; i++) | |
175 | if (length == 2) | |
176 | { | |
177 | mask = csky_get_mask (&p->op16[i]); | |
178 | if (mask != 0 && (inst & mask) == p->op16[i].opcode) | |
179 | { | |
180 | *pinfo = &p->op16[i]; | |
181 | g_opcodeP = p; | |
182 | return p; | |
183 | } | |
184 | } | |
185 | else if (length == 4) | |
186 | { | |
187 | mask = csky_get_mask (&p->op32[i]); | |
188 | if (mask != 0 | |
189 | && ((unsigned long)(inst & mask) | |
190 | == (unsigned long)p->op32[i].opcode)) | |
191 | { | |
192 | *pinfo = &p->op32[i]; | |
193 | g_opcodeP = p; | |
194 | return p; | |
195 | } | |
196 | } | |
197 | p++; | |
198 | } | |
199 | ||
200 | return NULL; | |
201 | } | |
202 | ||
203 | static bool | |
204 | is_extern_symbol (struct disassemble_info *info, int addr) | |
205 | { | |
206 | unsigned int rel_count = 0; | |
207 | ||
208 | if (info->section == NULL) | |
209 | return 0; | |
210 | if ((info->section->flags & SEC_RELOC) != 0) /* Fit .o file. */ | |
211 | { | |
212 | struct reloc_cache_entry *pt = info->section->relocation; | |
213 | for (; rel_count < info->section->reloc_count; rel_count++, pt++) | |
214 | if ((long unsigned int)addr == pt->address) | |
215 | return true; | |
216 | return false; | |
217 | } | |
218 | return false; | |
219 | } | |
220 | ||
221 | ||
222 | /* Suppress printing of mapping symbols emitted by the assembler to mark | |
223 | the beginning of code and data sequences. */ | |
224 | ||
225 | bool | |
226 | csky_symbol_is_valid (asymbol *sym, | |
227 | struct disassemble_info *info ATTRIBUTE_UNUSED) | |
228 | { | |
229 | const char *name; | |
230 | ||
231 | if (sym == NULL) | |
232 | return false; | |
233 | name = bfd_asymbol_name (sym); | |
234 | return name && *name != '$'; | |
235 | } | |
236 | ||
237 | disassembler_ftype | |
238 | csky_get_disassembler (bfd *abfd) | |
239 | { | |
240 | obj_attribute *attr; | |
241 | const char *sec_name = NULL; | |
242 | if (!abfd || bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
243 | dis_info.isa = CSKY_DEFAULT_ISA; | |
244 | else | |
245 | { | |
246 | mach_flag = elf_elfheader (abfd)->e_flags; | |
247 | ||
248 | sec_name = get_elf_backend_data (abfd)->obj_attrs_section; | |
249 | /* Skip any input that hasn't attribute section. | |
250 | This enables to link object files without attribute section with | |
251 | any others. */ | |
252 | if (bfd_get_section_by_name (abfd, sec_name) != NULL) | |
253 | { | |
254 | attr = elf_known_obj_attributes_proc (abfd); | |
255 | dis_info.isa = attr[Tag_CSKY_ISA_EXT_FLAGS].i; | |
256 | dis_info.isa <<= 32; | |
257 | dis_info.isa |= attr[Tag_CSKY_ISA_FLAGS].i; | |
258 | } | |
259 | else | |
260 | dis_info.isa = CSKY_DEFAULT_ISA; | |
261 | } | |
262 | ||
263 | return print_insn_csky; | |
264 | } | |
265 | ||
266 | /* Parse the string of disassembler options. */ | |
267 | static void | |
268 | parse_csky_dis_options (const char *opts_in) | |
269 | { | |
270 | char *opts = xstrdup (opts_in); | |
271 | char *opt = opts; | |
272 | char *opt_end = opts; | |
273 | ||
274 | for (; opt_end != NULL; opt = opt_end + 1) | |
275 | { | |
276 | if ((opt_end = strchr (opt, ',')) != NULL) | |
277 | *opt_end = 0; | |
278 | if (strcmp (opt, "abi-names") == 0) | |
279 | using_abi = 1; | |
280 | else | |
281 | fprintf (stderr, | |
282 | "unrecognized disassembler option: %s", opt); | |
283 | } | |
284 | } | |
285 | ||
286 | /* Get general register name. */ | |
287 | static const char * | |
288 | get_gr_name (int regno) | |
289 | { | |
290 | return csky_get_general_reg_name (mach_flag, regno, using_abi); | |
291 | } | |
292 | ||
293 | /* Get control register name. */ | |
294 | static const char * | |
295 | get_cr_name (unsigned int regno, int bank) | |
296 | { | |
297 | return csky_get_control_reg_name (mach_flag, bank, regno, using_abi); | |
298 | } | |
299 | ||
300 | static int | |
301 | csky_output_operand (char *str, struct operand const *oprnd, | |
302 | CSKY_INST_TYPE inst, int reloc ATTRIBUTE_UNUSED) | |
303 | { | |
304 | int ret = 0;; | |
305 | int bit = 0; | |
306 | int result = 0; | |
307 | bfd_vma value; | |
308 | int mask = oprnd->mask; | |
309 | int max = 0; | |
310 | char buf[128]; | |
311 | ||
312 | /* Get operand value with mask. */ | |
313 | value = inst & mask; | |
314 | for (; mask; mask >>= 1, value >>=1) | |
315 | if (mask & 0x1) | |
316 | { | |
317 | result |= ((value & 0x1) << bit); | |
318 | max |= (1 << bit); | |
319 | bit++; | |
320 | } | |
321 | value = result; | |
322 | ||
323 | /* Here is general instructions that have no reloc. */ | |
324 | switch (oprnd->type) | |
325 | { | |
326 | case OPRND_TYPE_CTRLREG: | |
327 | if (IS_CSKY_V1(mach_flag) && ((value & 0x1f) == 0x1f)) | |
328 | return -1; | |
329 | strcat (str, get_cr_name((value & 0x1f), (value >> 5))); | |
330 | break; | |
331 | case OPRND_TYPE_DUMMY_REG: | |
332 | mask = dis_info.opinfo->oprnd.oprnds[0].mask; | |
333 | value = inst & mask; | |
334 | for (; mask; mask >>= 1, value >>=1) | |
335 | if (mask & 0x1) | |
336 | { | |
337 | result |= ((value & 0x1) << bit); | |
338 | bit++; | |
339 | } | |
340 | value = result; | |
341 | strcat (str, get_gr_name (value)); | |
342 | break; | |
343 | case OPRND_TYPE_GREG0_7: | |
344 | case OPRND_TYPE_GREG0_15: | |
345 | case OPRND_TYPE_GREG16_31: | |
346 | case OPRND_TYPE_REGnsplr: | |
347 | case OPRND_TYPE_AREG: | |
348 | strcat (str, get_gr_name (value)); | |
349 | break; | |
350 | case OPRND_TYPE_CPREG: | |
351 | sprintf (buf, "cpr%d", (int)value); | |
352 | strcat (str, buf); | |
353 | break; | |
354 | case OPRND_TYPE_FREG: | |
355 | sprintf (buf, "fr%d", (int)value); | |
356 | strcat (str, buf); | |
357 | break; | |
358 | case OPRND_TYPE_VREG: | |
359 | dis_info.value = value; | |
360 | sprintf (buf, "vr%d", (int)value); | |
361 | strcat (str, buf); | |
362 | break; | |
363 | case OPRND_TYPE_CPCREG: | |
364 | sprintf (buf, "cpcr%d", (int)value); | |
365 | strcat (str, buf); | |
366 | break; | |
367 | case OPRND_TYPE_CPIDX: | |
368 | sprintf (buf, "cp%d", (int)value); | |
369 | strcat (str, buf); | |
370 | break; | |
371 | case OPRND_TYPE_IMM2b_JMPIX: | |
372 | value = (value + 2) << 3; | |
373 | sprintf (buf, "%d", (int)value); | |
374 | strcat (str, buf); | |
375 | break; | |
376 | case OPRND_TYPE_IMM_LDST: | |
377 | case OPRND_TYPE_IMM_FLDST: | |
378 | value <<= oprnd->shift; | |
379 | sprintf (buf, "0x%x", (unsigned int)value); | |
380 | strcat (str, buf); | |
381 | break; | |
382 | case OPRND_TYPE_IMM7b_LS2: | |
383 | case OPRND_TYPE_IMM8b_LS2: | |
384 | sprintf (buf, "%d", (int)(value << 2)); | |
385 | strcat (str, buf); | |
386 | ret = 0; | |
387 | break; | |
388 | case OPRND_TYPE_IMM5b_BMASKI: | |
389 | if ((value != 0) && (value > 31 || value < 8)) | |
390 | { | |
391 | ret = -1; | |
392 | break; | |
393 | } | |
394 | sprintf (buf, "%d", (int)value); | |
395 | strcat (str, buf); | |
396 | ret = 0; | |
397 | break; | |
398 | case OPRND_TYPE_IMM5b_1_31: | |
399 | if (value > 31 || value < 1) | |
400 | { | |
401 | ret = -1; | |
402 | break; | |
403 | } | |
404 | sprintf (buf, "%d", (int)value); | |
405 | strcat (str, buf); | |
406 | ret = 0; | |
407 | break; | |
408 | case OPRND_TYPE_IMM5b_7_31: | |
409 | if (value > 31 || value < 7) | |
410 | { | |
411 | ret = -1; | |
412 | break; | |
413 | } | |
414 | sprintf (buf, "%d", (int)value); | |
415 | strcat (str, buf); | |
416 | ret = 0; | |
417 | break; | |
418 | case OPRND_TYPE_IMM5b_VSH: | |
419 | { | |
420 | char num[128]; | |
421 | value = ((value & 0x1) << 4) | (value >> 1); | |
422 | sprintf (num, "%d", (int)value); | |
423 | strcat (str, num); | |
424 | ret = 0; | |
425 | break; | |
426 | } | |
427 | case OPRND_TYPE_MSB2SIZE: | |
428 | case OPRND_TYPE_LSB2SIZE: | |
429 | { | |
430 | static int size; | |
431 | if (oprnd->type == OPRND_TYPE_MSB2SIZE) | |
432 | size = value; | |
433 | else | |
434 | { | |
435 | str[strlen (str) - 2] = '\0'; | |
436 | sprintf (buf, "%d, %d", (int)(size + value), (int)value); | |
437 | strcat (str, buf); | |
438 | } | |
439 | break; | |
440 | } | |
441 | case OPRND_TYPE_IMM1b: | |
442 | case OPRND_TYPE_IMM2b: | |
443 | case OPRND_TYPE_IMM4b: | |
444 | case OPRND_TYPE_IMM5b: | |
445 | case OPRND_TYPE_IMM5b_LS: | |
446 | case OPRND_TYPE_IMM7b: | |
447 | case OPRND_TYPE_IMM8b: | |
448 | case OPRND_TYPE_IMM12b: | |
449 | case OPRND_TYPE_IMM15b: | |
450 | case OPRND_TYPE_IMM16b: | |
451 | case OPRND_TYPE_IMM16b_MOVIH: | |
452 | case OPRND_TYPE_IMM16b_ORI: | |
453 | sprintf (buf, "%d", (int)value); | |
454 | strcat (str, buf); | |
455 | ret = 0; | |
456 | break; | |
457 | case OPRND_TYPE_OFF8b: | |
458 | case OPRND_TYPE_OFF16b: | |
459 | { | |
460 | unsigned char ibytes[4]; | |
461 | int shift = oprnd->shift; | |
462 | int status; | |
463 | unsigned int mem_val; | |
464 | ||
465 | dis_info.info->stop_vma = 0; | |
466 | ||
467 | value = ((dis_info.mem + (value << shift) | |
468 | + ((IS_CSKY_V1 (mach_flag)) ? 2 : 0)) | |
469 | & 0xfffffffc); | |
470 | status = dis_info.info->read_memory_func (value, ibytes, 4, | |
471 | dis_info.info); | |
472 | if (status != 0) | |
473 | { | |
474 | dis_info.info->memory_error_func (status, dis_info.mem, | |
475 | dis_info.info); | |
476 | return -1; | |
477 | } | |
478 | mem_val = csky_chars_to_number (ibytes, 4); | |
479 | /* Remove [] around literal value to match ABI syntax. */ | |
480 | sprintf (buf, "0x%X", mem_val); | |
481 | strcat (str, buf); | |
482 | /* For jmpi/jsri, we'll try to get a symbol for the target. */ | |
483 | if (dis_info.info->print_address_func && mem_val != 0) | |
484 | { | |
485 | dis_info.value = mem_val; | |
486 | dis_info.need_output_symbol = 1; | |
487 | } | |
488 | else | |
489 | { | |
490 | sprintf (buf, "\t// from address pool at 0x%x", | |
491 | (unsigned int)value); | |
492 | strcat (str, buf); | |
493 | } | |
494 | break; | |
495 | } | |
496 | case OPRND_TYPE_BLOOP_OFF4b: | |
497 | case OPRND_TYPE_BLOOP_OFF12b: | |
498 | case OPRND_TYPE_OFF11b: | |
499 | case OPRND_TYPE_OFF16b_LSL1: | |
500 | case OPRND_TYPE_IMM_OFF18b: | |
501 | case OPRND_TYPE_OFF26b: | |
502 | { | |
503 | int shift = oprnd->shift; | |
504 | if (value & ((max >> 1) + 1)) | |
505 | value |= ~max; | |
506 | if (is_extern_symbol (dis_info.info, dis_info.mem)) | |
507 | value = 0; | |
508 | else if (IS_CSKY_V1 (mach_flag)) | |
509 | value = dis_info.mem + 2 + (value << shift); | |
510 | else | |
511 | value = dis_info.mem + (value << shift); | |
512 | dis_info.need_output_symbol = 1; | |
513 | dis_info.value= value; | |
514 | sprintf (buf, "0x%x", (unsigned int)value); | |
515 | strcat (str, buf); | |
516 | break; | |
517 | } | |
518 | case OPRND_TYPE_CONSTANT: | |
519 | case OPRND_TYPE_FCONSTANT: | |
520 | { | |
521 | int shift = oprnd->shift; | |
522 | bfd_byte ibytes[8]; | |
523 | int status; | |
524 | bfd_vma addr; | |
525 | int nbytes; | |
526 | ||
527 | dis_info.info->stop_vma = 0; | |
528 | value <<= shift; | |
529 | ||
530 | if (IS_CSKY_V1 (mach_flag)) | |
531 | addr = (dis_info.mem + 2 + value) & 0xfffffffc; | |
532 | else | |
533 | addr = (dis_info.mem + value) & 0xfffffffc; | |
534 | ||
535 | if (oprnd->type == OPRND_TYPE_FCONSTANT | |
536 | && dis_info.opinfo->opcode != CSKYV2_INST_FLRW) | |
537 | nbytes = 8; | |
538 | else | |
539 | nbytes = 4; | |
540 | ||
541 | status = dis_info.info->read_memory_func (addr, ibytes, | |
542 | nbytes, dis_info.info); | |
543 | if (status != 0) | |
544 | /* Address out of bounds. -> lrw rx, [pc, 0ffset]. */ | |
545 | sprintf (buf, "[pc, %d]\t// from address pool at %x", (int)value, | |
546 | (unsigned int)addr); | |
547 | else if (oprnd->type == OPRND_TYPE_FCONSTANT) | |
548 | { | |
549 | double f; | |
550 | ||
551 | if (dis_info.opinfo->opcode == CSKYV2_INST_FLRW) | |
552 | /* flrws. */ | |
553 | floatformat_to_double ((dis_info.info->endian == BFD_ENDIAN_BIG | |
554 | ? &floatformat_ieee_single_big | |
555 | : &floatformat_ieee_single_little), | |
556 | ibytes, &f); | |
557 | else | |
558 | floatformat_to_double ((dis_info.info->endian == BFD_ENDIAN_BIG | |
559 | ? &floatformat_ieee_double_big | |
560 | : &floatformat_ieee_double_little), | |
561 | ibytes, &f); | |
562 | sprintf (buf, "%.7g", f); | |
563 | } | |
564 | else | |
565 | { | |
566 | dis_info.value = addr; | |
567 | dis_info.need_output_symbol = 1; | |
568 | value = csky_chars_to_number (ibytes, 4); | |
569 | sprintf (buf, "0x%x", (unsigned int) value); | |
570 | } | |
571 | ||
572 | strcat (str, buf); | |
573 | break; | |
574 | } | |
575 | case OPRND_TYPE_ELRW_CONSTANT: | |
576 | { | |
577 | int shift = oprnd->shift; | |
578 | char ibytes[4]; | |
579 | int status; | |
580 | bfd_vma addr; | |
581 | dis_info.info->stop_vma = 0; | |
582 | ||
583 | value = 0x80 + ((~value) & 0x7f); | |
584 | ||
585 | value = value << shift; | |
586 | addr = (dis_info.mem + value) & 0xfffffffc; | |
587 | ||
588 | status = dis_info.info->read_memory_func (addr, (bfd_byte *)ibytes, | |
589 | 4, dis_info.info); | |
590 | if (status != 0) | |
591 | /* Address out of bounds. -> lrw rx, [pc, 0ffset]. */ | |
592 | sprintf (buf, "[pc, %d]\t// from address pool at %x", (int) value, | |
593 | (unsigned int)addr); | |
594 | else | |
595 | { | |
596 | dis_info.value = addr; | |
597 | value = csky_chars_to_number ((unsigned char *)ibytes, 4); | |
598 | dis_info.need_output_symbol = 1; | |
599 | sprintf (buf, "0x%x", (unsigned int)value); | |
600 | } | |
601 | ||
602 | strcat (str, buf); | |
603 | break; | |
604 | } | |
605 | case OPRND_TYPE_SFLOAT: | |
606 | case OPRND_TYPE_DFLOAT: | |
607 | { | |
608 | /* This is for fmovis/fmovid, which have an internal 13-bit | |
609 | encoding that they convert to single/double precision | |
610 | (respectively). We'll convert the 13-bit encoding to an IEEE | |
611 | double and then to host double format to print it. | |
612 | Sign bit: bit 20. | |
613 | 4-bit exponent: bits 19:16, biased by 11. | |
614 | 8-bit mantissa: split between 24:21 and 7:4. */ | |
615 | uint64_t imm4; | |
616 | uint64_t imm8; | |
617 | uint64_t dbnum; | |
618 | unsigned char valbytes[8]; | |
619 | double fvalue; | |
620 | ||
621 | imm4 = ((inst >> 16) & 0xf); | |
622 | imm4 = (uint64_t)(1023 - (imm4 - 11)) << 52; | |
623 | ||
624 | imm8 = (uint64_t)((inst >> 4) & 0xf) << 44; | |
625 | imm8 |= (uint64_t)((inst >> 21) & 0xf) << 48; | |
626 | ||
627 | dbnum = (uint64_t)((inst >> 20) & 1) << 63; | |
628 | dbnum |= imm4 | imm8; | |
629 | ||
630 | /* Do this a byte at a time so we don't have to | |
631 | worry about the host's endianness. */ | |
632 | valbytes[0] = dbnum & 0xff; | |
633 | valbytes[1] = (dbnum >> 8) & 0xff; | |
634 | valbytes[2] = (dbnum >> 16) & 0xff; | |
635 | valbytes[3] = (dbnum >> 24) & 0xff; | |
636 | valbytes[4] = (dbnum >> 32) & 0xff; | |
637 | valbytes[5] = (dbnum >> 40) & 0xff; | |
638 | valbytes[6] = (dbnum >> 48) & 0xff; | |
639 | valbytes[7] = (dbnum >> 56) & 0xff; | |
640 | ||
641 | floatformat_to_double (&floatformat_ieee_double_little, valbytes, | |
642 | &fvalue); | |
643 | ||
644 | sprintf (buf, "%.7g", fvalue); | |
645 | strcat (str, buf); | |
646 | break; | |
647 | } | |
648 | case OPRND_TYPE_HFLOAT_FMOVI: | |
649 | case OPRND_TYPE_SFLOAT_FMOVI: | |
650 | { | |
651 | int imm4; | |
652 | int imm8; | |
653 | imm4 = ((inst >> 16) & 0xf); | |
654 | imm4 = (138 - imm4) << 23; | |
655 | ||
656 | imm8 = ((inst >> 8) & 0x3); | |
657 | imm8 |= (((inst >> 20) & 0x3f) << 2); | |
658 | imm8 <<= 15; | |
659 | ||
660 | value = ((inst >> 5) & 1) << 31; | |
661 | value |= imm4 | imm8; | |
662 | ||
663 | imm4 = 138 - (imm4 >> 23); | |
664 | imm8 >>= 15; | |
665 | if ((inst >> 5) & 1) | |
666 | { | |
667 | imm8 = 0 - imm8; | |
668 | } | |
669 | ||
670 | float f = 0; | |
671 | memcpy (&f, &value, sizeof (float)); | |
672 | sprintf (buf, "%.7g\t// imm9:%4d, imm4:%2d", f, imm8, imm4); | |
673 | strcat (str, buf); | |
674 | ||
675 | break; | |
676 | } | |
677 | ||
678 | case OPRND_TYPE_DFLOAT_FMOVI: | |
679 | { | |
680 | uint64_t imm4; | |
681 | uint64_t imm8; | |
682 | uint64_t dvalue; | |
683 | imm4 = ((inst >> 16) & 0xf); | |
684 | imm4 = (1034 - imm4) << 52; | |
685 | ||
686 | imm8 = ((inst >> 8) & 0x3); | |
687 | imm8 |= (((inst >> 20) & 0x3f) << 2); | |
688 | imm8 <<= 44; | |
689 | ||
690 | dvalue = (((uint64_t)inst >> 5) & 1) << 63; | |
691 | dvalue |= imm4 | imm8; | |
692 | ||
693 | imm4 = 1034 - (imm4 >> 52); | |
694 | imm8 >>= 44; | |
695 | if (inst >> 5) | |
696 | { | |
697 | imm8 = 0 - imm8; | |
698 | } | |
699 | double d = 0; | |
700 | memcpy (&d, &dvalue, sizeof (double)); | |
701 | sprintf (buf, "%.7g\t// imm9:%4ld, imm4:%2ld", d, (long) imm8, (long) imm4); | |
702 | strcat (str, buf); | |
703 | ||
704 | break; | |
705 | } | |
706 | case OPRND_TYPE_LABEL_WITH_BRACKET: | |
707 | sprintf (buf, "[0x%x]", (unsigned int)value); | |
708 | strcat (str, buf); | |
709 | strcat (str, "\t// the offset is based on .data"); | |
710 | break; | |
711 | case OPRND_TYPE_OIMM3b: | |
712 | case OPRND_TYPE_OIMM4b: | |
713 | case OPRND_TYPE_OIMM5b: | |
714 | case OPRND_TYPE_OIMM5b_IDLY: | |
715 | case OPRND_TYPE_OIMM8b: | |
716 | case OPRND_TYPE_OIMM12b: | |
717 | case OPRND_TYPE_OIMM16b: | |
718 | case OPRND_TYPE_OIMM18b: | |
719 | value += 1; | |
720 | sprintf (buf, "%d", (int)value); | |
721 | strcat (str, buf); | |
722 | break; | |
723 | case OPRND_TYPE_OIMM5b_BMASKI: | |
724 | if (value > 32 || value < 16) | |
725 | { | |
726 | ret = -1; | |
727 | break; | |
728 | } | |
729 | sprintf (buf, "%d", (int)(value + 1)); | |
730 | strcat (str, buf); | |
731 | ret = 0; | |
732 | break; | |
733 | case OPRND_TYPE_FREGLIST_DASH: | |
734 | if (IS_CSKY_V2 (mach_flag)) | |
735 | { | |
736 | int vrx = 0; | |
737 | int vry = 0; | |
738 | if (dis_info.isa & CSKY_ISA_FLOAT_7E60 | |
739 | && (strstr (str, "fstm") != NULL | |
740 | || strstr (str, "fldm") != NULL)) | |
741 | { | |
742 | vrx = value & 0x1f; | |
743 | vry = vrx + (value >> 5); | |
744 | } | |
745 | else | |
746 | { | |
747 | vrx = value & 0xf; | |
748 | vry = vrx + (value >> 4); | |
749 | } | |
750 | sprintf (buf, "fr%d-fr%d", vrx, vry); | |
751 | strcat (str, buf); | |
752 | } | |
753 | break; | |
754 | case OPRND_TYPE_REGLIST_DASH: | |
755 | if (IS_CSKY_V1 (mach_flag)) | |
756 | { | |
757 | sprintf (buf, "%s-r15", get_gr_name (value)); | |
758 | strcat (str, buf); | |
759 | } | |
760 | else | |
761 | { | |
762 | if ((value & 0x1f) + (value >> 5) > 31) | |
763 | { | |
764 | ret = -1; | |
765 | break; | |
766 | } | |
767 | strcat (str, get_gr_name ((value >> 5))); | |
768 | strcat (str, "-"); | |
769 | strcat (str, get_gr_name ((value & 0x1f) + (value >> 5))); | |
770 | } | |
771 | break; | |
772 | case OPRND_TYPE_PSR_BITS_LIST: | |
773 | { | |
774 | struct psrbit const *bits; | |
775 | int first_oprnd = true; | |
776 | int i = 0; | |
777 | if (IS_CSKY_V1 (mach_flag)) | |
778 | { | |
779 | if (value == 0) | |
780 | { | |
781 | strcat (str, "af"); | |
782 | break; | |
783 | } | |
784 | bits = cskyv1_psr_bits; | |
785 | } | |
786 | else | |
787 | bits = cskyv2_psr_bits; | |
788 | while (value != 0 && bits[i].name != NULL) | |
789 | { | |
790 | if (value & bits[i].value) | |
791 | { | |
792 | if (!first_oprnd) | |
793 | strcat (str, ", "); | |
794 | strcat (str, bits[i].name); | |
795 | value &= ~bits[i].value; | |
796 | first_oprnd = false; | |
797 | } | |
798 | i++; | |
799 | } | |
800 | break; | |
801 | } | |
802 | case OPRND_TYPE_REGbsp: | |
803 | if (IS_CSKY_V1 (mach_flag)) | |
804 | sprintf(buf, "(%s)", get_gr_name (0)); | |
805 | else | |
806 | sprintf(buf, "(%s)", get_gr_name (14)); | |
807 | strcat (str, buf); | |
808 | break; | |
809 | case OPRND_TYPE_REGsp: | |
810 | if (IS_CSKY_V1 (mach_flag)) | |
811 | strcat (str, get_gr_name (0)); | |
812 | else | |
813 | strcat (str, get_gr_name (14)); | |
814 | break; | |
815 | case OPRND_TYPE_REGnr4_r7: | |
816 | case OPRND_TYPE_AREG_WITH_BRACKET: | |
817 | strcat (str, "("); | |
818 | strcat (str, get_gr_name (value)); | |
819 | strcat (str, ")"); | |
820 | break; | |
821 | case OPRND_TYPE_AREG_WITH_LSHIFT: | |
822 | strcat (str, get_gr_name (value >> 5)); | |
823 | strcat (str, " << "); | |
824 | if ((value & 0x1f) == 0x1) | |
825 | strcat (str, "0"); | |
826 | else if ((value & 0x1f) == 0x2) | |
827 | strcat (str, "1"); | |
828 | else if ((value & 0x1f) == 0x4) | |
829 | strcat (str, "2"); | |
830 | else if ((value & 0x1f) == 0x8) | |
831 | strcat (str, "3"); | |
832 | break; | |
833 | case OPRND_TYPE_AREG_WITH_LSHIFT_FPU: | |
834 | strcat (str, get_gr_name (value >> 2)); | |
835 | strcat (str, " << "); | |
836 | if ((value & 0x3) == 0x0) | |
837 | strcat (str, "0"); | |
838 | else if ((value & 0x3) == 0x1) | |
839 | strcat (str, "1"); | |
840 | else if ((value & 0x3) == 0x2) | |
841 | strcat (str, "2"); | |
842 | else if ((value & 0x3) == 0x3) | |
843 | strcat (str, "3"); | |
844 | break; | |
845 | case OPRND_TYPE_VREG_WITH_INDEX: | |
846 | { | |
847 | unsigned freg_val = value & 0xf; | |
848 | unsigned index_val = (value >> 4) & 0xf; | |
849 | sprintf (buf, "vr%d[%d]", freg_val, index_val); | |
850 | strcat(str, buf); | |
851 | break; | |
852 | } | |
853 | case OPRND_TYPE_FREG_WITH_INDEX: | |
854 | { | |
855 | unsigned freg_val = value & 0xf; | |
856 | unsigned index_val = (value >> 4) & 0xf; | |
857 | sprintf (buf, "fr%d[%d]", freg_val, index_val); | |
858 | strcat(str, buf); | |
859 | break; | |
860 | } | |
861 | case OPRND_TYPE_REGr4_r7: | |
862 | if (IS_CSKY_V1 (mach_flag)) | |
863 | { | |
864 | sprintf (buf, "%s-%s", get_gr_name (4), get_gr_name (7)); | |
865 | strcat (str, buf); | |
866 | } | |
867 | break; | |
868 | case OPRND_TYPE_CONST1: | |
869 | strcat (str, "1"); | |
870 | break; | |
871 | case OPRND_TYPE_REG_r1a: | |
872 | case OPRND_TYPE_REG_r1b: | |
873 | strcat (str, get_gr_name (1)); | |
874 | break; | |
875 | case OPRND_TYPE_REG_r28: | |
876 | strcat (str, get_gr_name (28)); | |
877 | break; | |
878 | case OPRND_TYPE_REGLIST_DASH_COMMA: | |
879 | /* 16-bit reglist. */ | |
880 | if (value & 0xf) | |
881 | { | |
882 | strcat (str, get_gr_name (4)); | |
883 | if ((value & 0xf) > 1) | |
884 | { | |
885 | strcat (str, "-"); | |
886 | strcat (str, get_gr_name ((value & 0xf) + 3)); | |
887 | } | |
888 | if (value & ~0xf) | |
889 | strcat (str, ", "); | |
890 | } | |
891 | if (value & 0x10) | |
892 | { | |
893 | /* r15. */ | |
894 | strcat (str, get_gr_name (15)); | |
895 | if (value & ~0x1f) | |
896 | strcat (str, ", "); | |
897 | } | |
898 | if (dis_info.opinfo->oprnd.oprnds[0].mask != OPRND_MASK_0_4) | |
899 | { | |
900 | /* 32bits reglist. */ | |
901 | value >>= 5; | |
902 | if (value & 0x3) | |
903 | { | |
904 | strcat (str, get_gr_name (16)); | |
905 | if ((value & 0x7) > 1) | |
906 | { | |
907 | strcat (str, "-"); | |
908 | strcat (str, get_gr_name ((value & 0x7) + 15)); | |
909 | } | |
910 | if (value & ~0x7) | |
911 | strcat (str, ", "); | |
912 | } | |
913 | if (value & 0x8) | |
914 | /* r15. */ | |
915 | strcat (str, get_gr_name (28)); | |
916 | } | |
917 | break; | |
918 | case OPRND_TYPE_UNCOND10b: | |
919 | case OPRND_TYPE_UNCOND16b: | |
920 | case OPRND_TYPE_COND10b: | |
921 | case OPRND_TYPE_COND16b: | |
922 | { | |
923 | int shift = oprnd->shift; | |
924 | ||
925 | if (value & ((max >> 1) + 1)) | |
926 | value |= ~max; | |
927 | if (is_extern_symbol (dis_info.info, dis_info.mem)) | |
928 | value = 0; | |
929 | else | |
930 | value = dis_info.mem + (value << shift); | |
931 | sprintf (buf, "0x%x", (unsigned int)value); | |
932 | strcat (str, buf); | |
933 | dis_info.need_output_symbol = 1; | |
934 | dis_info.value = value; | |
935 | } | |
936 | break; | |
937 | ||
938 | default: | |
939 | ret = -1; | |
940 | break; | |
941 | } | |
942 | return ret; | |
943 | } | |
944 | ||
945 | static int | |
946 | csky_print_operand (char *str, struct operand const *oprnd, | |
947 | CSKY_INST_TYPE inst, int reloc) | |
948 | { | |
949 | int ret = -1; | |
950 | char *lc = ""; | |
951 | char *rc = ""; | |
952 | if (oprnd->mask == HAS_SUB_OPERAND) | |
953 | { | |
954 | struct soperand *sop = (struct soperand *)oprnd; | |
955 | if (oprnd->type == OPRND_TYPE_BRACKET) | |
956 | { | |
957 | lc = "("; | |
958 | rc = ")"; | |
959 | } | |
960 | else if (oprnd->type == OPRND_TYPE_ABRACKET) | |
961 | { | |
962 | lc = "<"; | |
963 | rc = ">"; | |
964 | } | |
965 | strcat (str, lc); | |
966 | ret = csky_print_operand (str, &sop->subs[0], inst, reloc); | |
967 | if (ret) | |
968 | return ret; | |
969 | strcat (str, ", "); | |
970 | ret = csky_print_operand (str, &sop->subs[1], inst, reloc); | |
971 | strcat (str, rc); | |
972 | return ret; | |
973 | } | |
974 | return csky_output_operand (str, oprnd, inst, reloc); | |
975 | } | |
976 | ||
977 | static int | |
978 | csky_print_operands (char *str, struct csky_opcode_info const *pinfo, | |
979 | struct disassemble_info *info, CSKY_INST_TYPE inst, | |
980 | int reloc) | |
981 | { | |
982 | int i = 0; | |
983 | int ret = 0; | |
984 | if (pinfo->operand_num) | |
985 | strcat (str, " \t"); | |
986 | if (pinfo->operand_num == -1) | |
987 | { | |
988 | ret = csky_print_operand (str, &pinfo->oprnd.oprnds[i], inst, reloc); | |
989 | if (ret) | |
990 | return ret; | |
991 | } | |
992 | else | |
993 | for (; i < pinfo->operand_num; i++) | |
994 | { | |
995 | if (i != 0) | |
996 | strcat (str, ", "); | |
997 | ret = csky_print_operand (str, &pinfo->oprnd.oprnds[i], inst, reloc); | |
998 | if (ret) | |
999 | return ret; | |
1000 | } | |
1001 | info->fprintf_func (info->stream, "%s", str); | |
1002 | if (dis_info.need_output_symbol) | |
1003 | { | |
1004 | info->fprintf_func (info->stream, "\t// "); | |
1005 | info->print_address_func (dis_info.value, dis_info.info); | |
1006 | } | |
1007 | return 0; | |
1008 | } | |
1009 | ||
1010 | static void | |
1011 | number_to_chars_littleendian (char *buf, CSKY_INST_TYPE val, int n) | |
1012 | { | |
1013 | if (n <= 0) | |
1014 | abort (); | |
1015 | while (n--) | |
1016 | { | |
1017 | *buf++ = val & 0xff; | |
1018 | val >>= 8; | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | #define CSKY_READ_DATA() \ | |
1023 | { \ | |
1024 | status = info->read_memory_func (memaddr, buf, 2, info); \ | |
1025 | if (status) \ | |
1026 | { \ | |
1027 | info->memory_error_func (status, memaddr, info); \ | |
1028 | return -1; \ | |
1029 | } \ | |
1030 | if (info->endian == BFD_ENDIAN_BIG) \ | |
1031 | inst |= (buf[0] << 8) | buf[1]; \ | |
1032 | else if (info->endian == BFD_ENDIAN_LITTLE) \ | |
1033 | inst |= (buf[1] << 8) | buf[0]; \ | |
1034 | else \ | |
1035 | abort(); \ | |
1036 | info->bytes_per_chunk += 2; \ | |
1037 | memaddr += 2; \ | |
1038 | } | |
1039 | ||
1040 | int | |
1041 | print_insn_csky (bfd_vma memaddr, struct disassemble_info *info) | |
1042 | { | |
1043 | unsigned char buf[4]; | |
1044 | CSKY_INST_TYPE inst = 0; | |
1045 | int status; | |
1046 | char str[256]; | |
1047 | unsigned long given; | |
1048 | int is_data = false; | |
1049 | void (*printer) (bfd_vma, struct disassemble_info *, long); | |
1050 | unsigned int size = 4; | |
1051 | ||
1052 | memset (str, 0, sizeof (str)); | |
1053 | info->bytes_per_chunk = 0; | |
1054 | info->bytes_per_chunk = 0; | |
1055 | dis_info.mem = memaddr; | |
1056 | dis_info.info = info; | |
1057 | dis_info.need_output_symbol = 0; | |
1058 | ||
1059 | if (info->disassembler_options) | |
1060 | { | |
1061 | parse_csky_dis_options (info->disassembler_options); | |
1062 | info->disassembler_options = NULL; | |
1063 | } | |
1064 | ||
1065 | if (mach_flag != INIT_MACH_FLAG && mach_flag != BINARY_MACH_FLAG) | |
1066 | info->mach = mach_flag; | |
1067 | else if (mach_flag == INIT_MACH_FLAG) | |
1068 | { | |
1069 | mach_flag = info->mach; | |
1070 | dis_info.isa = CSKY_DEFAULT_ISA; | |
1071 | } | |
1072 | ||
1073 | if (mach_flag == BINARY_MACH_FLAG && info->endian == BFD_ENDIAN_UNKNOWN) | |
1074 | { | |
1075 | info->endian = BFD_ENDIAN_LITTLE; | |
1076 | dis_info.isa = CSKY_DEFAULT_ISA; | |
1077 | } | |
1078 | ||
1079 | /* First check the full symtab for a mapping symbol, even if there | |
1080 | are no usable non-mapping symbols for this address. */ | |
1081 | if (info->symtab_size != 0 | |
1082 | && bfd_asymbol_flavour (*info->symtab) == bfd_target_elf_flavour) | |
1083 | { | |
1084 | bfd_vma addr; | |
1085 | int n; | |
1086 | int last_sym = -1; | |
1087 | enum sym_type type = CUR_TEXT; | |
1088 | ||
1089 | if (memaddr <= last_map_addr) | |
1090 | last_map_sym = -1; | |
1091 | /* Start scanning at the start of the function, or wherever | |
1092 | we finished last time. */ | |
1093 | n = 0; | |
1094 | if (n < last_map_sym) | |
1095 | n = last_map_sym; | |
1096 | ||
1097 | /* Scan up to the location being disassembled. */ | |
1098 | for (; n < info->symtab_size; n++) | |
1099 | { | |
1100 | addr = bfd_asymbol_value (info->symtab[n]); | |
1101 | if (addr > memaddr) | |
1102 | break; | |
1103 | if ((info->section == NULL | |
1104 | || info->section == info->symtab[n]->section) | |
1105 | && get_sym_code_type (info, n, &type)) | |
1106 | last_sym = n; | |
1107 | } | |
1108 | last_map_sym = last_sym; | |
1109 | last_type = type; | |
1110 | is_data = (last_type == CUR_DATA); | |
1111 | if (is_data) | |
1112 | { | |
1113 | size = 4 - ( memaddr & 3); | |
1114 | for (n = last_sym + 1; n < info->symtab_size; n++) | |
1115 | { | |
1116 | addr = bfd_asymbol_value (info->symtab[n]); | |
1117 | if (addr > memaddr) | |
1118 | { | |
1119 | if (addr - memaddr < size) | |
1120 | size = addr - memaddr; | |
1121 | break; | |
1122 | } | |
1123 | } | |
1124 | /* If the next symbol is after three bytes, we need to | |
1125 | print only part of the data, so that we can use either | |
1126 | .byte or .short. */ | |
1127 | if (size == 3) | |
1128 | size = (memaddr & 1) ? 1 : 2; | |
1129 | } | |
1130 | } | |
1131 | info->bytes_per_line = 4; | |
1132 | ||
1133 | if (is_data) | |
1134 | { | |
1135 | int i; | |
1136 | ||
1137 | /* Size was already set above. */ | |
1138 | info->bytes_per_chunk = size; | |
1139 | printer = print_insn_data; | |
1140 | ||
1141 | status = info->read_memory_func (memaddr, (bfd_byte *) buf, size, info); | |
1142 | given = 0; | |
1143 | if (info->endian == BFD_ENDIAN_LITTLE) | |
1144 | for (i = size - 1; i >= 0; i--) | |
1145 | given = buf[i] | (given << 8); | |
1146 | else | |
1147 | for (i = 0; i < (int) size; i++) | |
1148 | given = buf[i] | (given << 8); | |
1149 | ||
1150 | printer (memaddr, info, given); | |
1151 | return info->bytes_per_chunk; | |
1152 | } | |
1153 | ||
1154 | /* Handle instructions. */ | |
1155 | CSKY_READ_DATA(); | |
1156 | if ((inst & 0xc000) == 0xc000 && IS_CSKY_V2 (mach_flag)) | |
1157 | { | |
1158 | /* It's a 32-bit instruction. */ | |
1159 | inst <<= 16; | |
1160 | CSKY_READ_DATA(); | |
1161 | if (info->buffer && (info->endian == BFD_ENDIAN_LITTLE)) | |
1162 | { | |
1163 | char* src = (char *)(info->buffer | |
1164 | + ((memaddr - 4 - info->buffer_vma) | |
1165 | * info->octets_per_byte)); | |
1166 | if (info->endian == BFD_ENDIAN_LITTLE) | |
1167 | number_to_chars_littleendian (src, inst, 4); | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | if (IS_CSKY_V1 (mach_flag)) | |
1172 | g_opcodeP = csky_v1_opcodes; | |
1173 | else | |
1174 | g_opcodeP = csky_v2_opcodes; | |
1175 | ||
1176 | do | |
1177 | { | |
1178 | struct csky_opcode const *op; | |
1179 | struct csky_opcode_info const *pinfo = NULL; | |
1180 | int reloc; | |
1181 | ||
1182 | memset (str, 0, sizeof (str)); | |
1183 | op = csky_find_inst_info (&pinfo, inst, info->bytes_per_chunk); | |
1184 | if (!op) | |
1185 | { | |
1186 | if (IS_CSKY_V1 (mach_flag)) | |
1187 | info->fprintf_func (info->stream, ".short: 0x%04x", | |
1188 | (unsigned short)inst); | |
1189 | else | |
1190 | info->fprintf_func (info->stream, ".long: 0x%08x", | |
1191 | (unsigned int)inst); | |
1192 | return info->bytes_per_chunk; | |
1193 | } | |
1194 | ||
1195 | if (info->bytes_per_chunk == 2) | |
1196 | reloc = op->reloc16; | |
1197 | else | |
1198 | reloc = op->reloc32; | |
1199 | dis_info.opinfo = pinfo; | |
1200 | strcat (str, op->mnemonic); | |
1201 | ||
1202 | if (csky_print_operands (str, pinfo, info, inst, reloc)) | |
1203 | g_opcodeP++; | |
1204 | else | |
1205 | break; | |
1206 | } while (1); | |
1207 | ||
1208 | return info->bytes_per_chunk; | |
1209 | } |