Commit | Line | Data |
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bfc10abe DE |
1 | /* Disassembler interface for targets using CGEN. -*- C -*- |
2 | CGEN: Cpu tools GENerator | |
3 | ||
1c8f439e | 4 | THIS FILE IS USED TO GENERATE @prefix@-dis.c. |
bfc10abe | 5 | |
1c8f439e | 6 | Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. |
bfc10abe DE |
7 | |
8 | This file is part of the GNU Binutils and GDB, the GNU debugger. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
1c8f439e DE |
21 | along with this program; if not, write to the Free Software Foundation, Inc., |
22 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
bfc10abe DE |
23 | |
24 | #include "sysdep.h" | |
25 | #include <stdio.h> | |
26 | #include "ansidecl.h" | |
27 | #include "dis-asm.h" | |
28 | #include "bfd.h" | |
833d2990 | 29 | #include "symcat.h" |
1c8f439e DE |
30 | #include "@prefix@-opc.h" |
31 | #include "opintl.h" | |
bfc10abe | 32 | |
1c8f439e DE |
33 | #undef INLINE |
34 | #ifdef __GNUC__ | |
35 | #define INLINE __inline__ | |
36 | #else | |
37 | #define INLINE | |
bfc10abe DE |
38 | #endif |
39 | ||
1c8f439e DE |
40 | /* Default text to print if an instruction isn't recognized. */ |
41 | #define UNKNOWN_INSN_MSG _("*unknown*") | |
42 | ||
5730d39d DE |
43 | /* Used by the ifield rtx function. */ |
44 | #define FLD(f) (fields->f) | |
45 | ||
1c8f439e | 46 | static int extract_normal |
5730d39d DE |
47 | PARAMS ((CGEN_OPCODE_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, |
48 | unsigned int, unsigned int, unsigned int, unsigned int, | |
49 | unsigned int, unsigned int, bfd_vma, long *)); | |
1c8f439e DE |
50 | static void print_normal |
51 | PARAMS ((CGEN_OPCODE_DESC, PTR, long, unsigned int, bfd_vma, int)); | |
52 | static void print_address | |
53 | PARAMS ((CGEN_OPCODE_DESC, PTR, bfd_vma, unsigned int, bfd_vma, int)); | |
54 | static void print_keyword | |
55 | PARAMS ((CGEN_OPCODE_DESC, PTR, CGEN_KEYWORD *, long, unsigned int)); | |
bfc10abe | 56 | static int extract_insn_normal |
1c8f439e | 57 | PARAMS ((CGEN_OPCODE_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *, |
5730d39d | 58 | CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma)); |
bfc10abe | 59 | static void print_insn_normal |
1c8f439e DE |
60 | PARAMS ((CGEN_OPCODE_DESC, PTR, const CGEN_INSN *, CGEN_FIELDS *, |
61 | bfd_vma, int)); | |
62 | static int print_insn PARAMS ((CGEN_OPCODE_DESC, bfd_vma, | |
63 | disassemble_info *, char *, int)); | |
64 | static int default_print_insn | |
65 | PARAMS ((CGEN_OPCODE_DESC, bfd_vma, disassemble_info *)); | |
66 | \f | |
67 | /* -- disassembler routines inserted here */ | |
bfc10abe | 68 | \f |
1c8f439e DE |
69 | #if ! CGEN_INT_INSN_P |
70 | ||
5730d39d DE |
71 | /* Subroutine of extract_normal. |
72 | Ensure sufficient bytes are cached in EX_INFO. | |
73 | OFFSET is the offset in bytes from the start of the insn of the value. | |
74 | BYTES is the length of the needed value. | |
75 | Returns 1 for success, 0 for failure. */ | |
76 | ||
77 | static INLINE int | |
78 | fill_cache (od, ex_info, offset, bytes, pc) | |
79 | CGEN_OPCODE_DESC od; | |
80 | CGEN_EXTRACT_INFO *ex_info; | |
81 | int offset, bytes; | |
82 | bfd_vma pc; | |
83 | { | |
84 | /* It's doubtful that the middle part has already been fetched so | |
85 | we don't optimize that case. kiss. */ | |
86 | int mask; | |
87 | disassemble_info *info = (disassemble_info *) ex_info->dis_info; | |
88 | ||
89 | /* First do a quick check. */ | |
90 | mask = (1 << bytes) - 1; | |
91 | if (((ex_info->valid >> offset) & mask) == mask) | |
92 | return 1; | |
93 | ||
94 | /* Search for the first byte we need to read. */ | |
95 | for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1) | |
96 | if (! (mask & ex_info->valid)) | |
97 | break; | |
98 | ||
99 | if (bytes) | |
100 | { | |
101 | int status; | |
102 | ||
103 | pc += offset; | |
104 | status = (*info->read_memory_func) | |
105 | (pc, ex_info->insn_bytes + offset, bytes, info); | |
106 | ||
107 | if (status != 0) | |
108 | { | |
109 | (*info->memory_error_func) (status, pc, info); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | ex_info->valid |= ((1 << bytes) - 1) << offset; | |
114 | } | |
115 | ||
116 | return 1; | |
117 | } | |
118 | ||
1c8f439e DE |
119 | /* Subroutine of extract_normal. */ |
120 | ||
121 | static INLINE long | |
5730d39d | 122 | extract_1 (od, ex_info, start, length, word_length, bufp, pc) |
1c8f439e | 123 | CGEN_OPCODE_DESC od; |
5730d39d | 124 | CGEN_EXTRACT_INFO *ex_info; |
1c8f439e DE |
125 | int start,length,word_length; |
126 | unsigned char *bufp; | |
5730d39d | 127 | bfd_vma pc; |
1c8f439e DE |
128 | { |
129 | unsigned long x,mask; | |
130 | int shift; | |
131 | int big_p = CGEN_OPCODE_INSN_ENDIAN (od) == CGEN_ENDIAN_BIG; | |
132 | ||
1c8f439e DE |
133 | switch (word_length) |
134 | { | |
135 | case 8: | |
136 | x = *bufp; | |
137 | break; | |
138 | case 16: | |
139 | if (big_p) | |
140 | x = bfd_getb16 (bufp); | |
141 | else | |
142 | x = bfd_getl16 (bufp); | |
143 | break; | |
144 | case 24: | |
145 | /* ??? This may need reworking as these cases don't necessarily | |
146 | want the first byte and the last two bytes handled like this. */ | |
147 | if (big_p) | |
5730d39d | 148 | x = (bufp[0] << 16) | bfd_getb16 (bufp + 1); |
1c8f439e | 149 | else |
5730d39d | 150 | x = bfd_getl16 (bufp) | (bufp[2] << 16); |
1c8f439e DE |
151 | break; |
152 | case 32: | |
153 | if (big_p) | |
154 | x = bfd_getb32 (bufp); | |
155 | else | |
156 | x = bfd_getl32 (bufp); | |
157 | break; | |
158 | default : | |
159 | abort (); | |
160 | } | |
161 | ||
162 | /* Written this way to avoid undefined behaviour. */ | |
163 | mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
164 | if (CGEN_INSN_LSB0_P) | |
5730d39d | 165 | shift = (start + 1) - length; |
1c8f439e DE |
166 | else |
167 | shift = (word_length - (start + length)); | |
168 | return (x >> shift) & mask; | |
169 | } | |
170 | ||
171 | #endif /* ! CGEN_INT_INSN_P */ | |
172 | ||
bfc10abe DE |
173 | /* Default extraction routine. |
174 | ||
5730d39d DE |
175 | INSN_VALUE is the first CGEN_BASE_INSN_SIZE bits of the insn in host order, |
176 | or sometimes less for cases like the m32r where the base insn size is 32 | |
177 | but some insns are 16 bits. | |
178 | ATTRS is a mask of the boolean attributes. We only need `UNSIGNED', | |
179 | but for generality we take a bitmask of all of them. | |
180 | WORD_OFFSET is the offset in bits from the start of the insn of the value. | |
181 | WORD_LENGTH is the length of the word in bits in which the value resides. | |
182 | START is the starting bit number in the word, architecture origin. | |
183 | LENGTH is the length of VALUE in bits. | |
184 | TOTAL_LENGTH is the total length of the insn in bits. | |
185 | ||
186 | Returns 1 for success, 0 for failure. */ | |
187 | ||
188 | /* ??? The return code isn't properly used. wip. */ | |
bfc10abe | 189 | |
1c8f439e DE |
190 | /* ??? This doesn't handle bfd_vma's. Create another function when |
191 | necessary. */ | |
192 | ||
bfc10abe | 193 | static int |
5730d39d DE |
194 | extract_normal (od, ex_info, insn_value, attrs, word_offset, start, length, |
195 | word_length, total_length, pc, valuep) | |
1c8f439e DE |
196 | CGEN_OPCODE_DESC od; |
197 | CGEN_EXTRACT_INFO *ex_info; | |
5730d39d | 198 | CGEN_INSN_INT insn_value; |
bfc10abe | 199 | unsigned int attrs; |
5730d39d DE |
200 | unsigned int word_offset, start, length, word_length, total_length; |
201 | bfd_vma pc; | |
bfc10abe DE |
202 | long *valuep; |
203 | { | |
5730d39d | 204 | CGEN_INSN_INT value; |
1c8f439e DE |
205 | |
206 | /* If LENGTH is zero, this operand doesn't contribute to the value | |
207 | so give it a standard value of zero. */ | |
208 | if (length == 0) | |
209 | { | |
210 | *valuep = 0; | |
211 | return 1; | |
212 | } | |
213 | ||
5730d39d DE |
214 | if (CGEN_INT_INSN_P |
215 | && word_offset != 0) | |
216 | abort (); | |
1c8f439e | 217 | |
5730d39d DE |
218 | if (word_length > 32) |
219 | abort (); | |
1c8f439e | 220 | |
5730d39d DE |
221 | /* For architectures with insns smaller than the insn-base-bitsize, |
222 | word_length may be too big. */ | |
223 | #if CGEN_MIN_INSN_BITSIZE < CGEN_BASE_INSN_BITSIZE | |
224 | if (word_offset == 0 | |
225 | && word_length > total_length) | |
226 | word_length = total_length; | |
227 | #endif | |
bfc10abe | 228 | |
5730d39d | 229 | /* Does the value reside in INSN_VALUE? */ |
bfc10abe | 230 | |
5730d39d DE |
231 | if (word_offset == 0) |
232 | { | |
233 | /* Written this way to avoid undefined behaviour. */ | |
234 | CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
1c8f439e | 235 | |
5730d39d DE |
236 | if (CGEN_INSN_LSB0_P) |
237 | value = insn_value >> ((start + 1) - length); | |
238 | else | |
239 | value = insn_value >> (word_length - (start + length)); | |
240 | value &= mask; | |
241 | /* sign extend? */ | |
242 | if (! CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_UNSIGNED) | |
243 | && (value & (1L << (length - 1)))) | |
244 | value |= ~mask; | |
245 | } | |
1c8f439e | 246 | |
5730d39d | 247 | #if ! CGEN_INT_INSN_P |
1c8f439e | 248 | |
bfc10abe | 249 | else |
1c8f439e | 250 | { |
5730d39d | 251 | unsigned char *bufp = ex_info->insn_bytes + word_offset / 8; |
1c8f439e | 252 | |
5730d39d | 253 | if (word_length > 32) |
1c8f439e DE |
254 | abort (); |
255 | ||
5730d39d DE |
256 | if (fill_cache (od, ex_info, word_offset / 8, word_length / 8, pc) == 0) |
257 | return 0; | |
1c8f439e | 258 | |
5730d39d | 259 | value = extract_1 (od, ex_info, start, length, word_length, bufp, pc); |
1c8f439e DE |
260 | } |
261 | ||
262 | #endif /* ! CGEN_INT_INSN_P */ | |
bfc10abe DE |
263 | |
264 | *valuep = value; | |
833d2990 | 265 | |
bfc10abe DE |
266 | return 1; |
267 | } | |
268 | ||
269 | /* Default print handler. */ | |
270 | ||
271 | static void | |
1c8f439e DE |
272 | print_normal (od, dis_info, value, attrs, pc, length) |
273 | CGEN_OPCODE_DESC od; | |
ab0bd049 | 274 | PTR dis_info; |
bfc10abe DE |
275 | long value; |
276 | unsigned int attrs; | |
1c8f439e | 277 | bfd_vma pc; |
bfc10abe DE |
278 | int length; |
279 | { | |
1c8f439e DE |
280 | disassemble_info *info = (disassemble_info *) dis_info; |
281 | ||
282 | #ifdef CGEN_PRINT_NORMAL | |
283 | CGEN_PRINT_NORMAL (od, info, value, attrs, pc, length); | |
284 | #endif | |
bfc10abe DE |
285 | |
286 | /* Print the operand as directed by the attributes. */ | |
1c8f439e DE |
287 | if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) |
288 | ; /* nothing to do */ | |
289 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_UNSIGNED)) | |
bfc10abe DE |
290 | (*info->fprintf_func) (info->stream, "0x%lx", value); |
291 | else | |
292 | (*info->fprintf_func) (info->stream, "%ld", value); | |
293 | } | |
294 | ||
1c8f439e DE |
295 | /* Default address handler. */ |
296 | ||
297 | static void | |
298 | print_address (od, dis_info, value, attrs, pc, length) | |
299 | CGEN_OPCODE_DESC od; | |
300 | PTR dis_info; | |
301 | bfd_vma value; | |
302 | unsigned int attrs; | |
303 | bfd_vma pc; | |
304 | int length; | |
305 | { | |
306 | disassemble_info *info = (disassemble_info *) dis_info; | |
307 | ||
308 | #ifdef CGEN_PRINT_ADDRESS | |
309 | CGEN_PRINT_ADDRESS (od, info, value, attrs, pc, length); | |
310 | #endif | |
311 | ||
312 | /* Print the operand as directed by the attributes. */ | |
313 | if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) | |
314 | ; /* nothing to do */ | |
315 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR)) | |
316 | (*info->print_address_func) (value, info); | |
317 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR)) | |
318 | (*info->print_address_func) (value, info); | |
319 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_UNSIGNED)) | |
320 | (*info->fprintf_func) (info->stream, "0x%lx", (long) value); | |
321 | else | |
322 | (*info->fprintf_func) (info->stream, "%ld", (long) value); | |
323 | } | |
324 | ||
bfc10abe DE |
325 | /* Keyword print handler. */ |
326 | ||
327 | static void | |
1c8f439e DE |
328 | print_keyword (od, dis_info, keyword_table, value, attrs) |
329 | CGEN_OPCODE_DESC od; | |
ab0bd049 | 330 | PTR dis_info; |
bfc10abe DE |
331 | CGEN_KEYWORD *keyword_table; |
332 | long value; | |
1c8f439e | 333 | unsigned int attrs; |
bfc10abe | 334 | { |
1c8f439e | 335 | disassemble_info *info = (disassemble_info *) dis_info; |
bfc10abe DE |
336 | const CGEN_KEYWORD_ENTRY *ke; |
337 | ||
338 | ke = cgen_keyword_lookup_value (keyword_table, value); | |
339 | if (ke != NULL) | |
340 | (*info->fprintf_func) (info->stream, "%s", ke->name); | |
341 | else | |
342 | (*info->fprintf_func) (info->stream, "???"); | |
343 | } | |
344 | \f | |
bfc10abe DE |
345 | /* Default insn extractor. |
346 | ||
1c8f439e DE |
347 | INSN_VALUE is the first CGEN_BASE_INSN_SIZE bytes, translated to host order. |
348 | The extracted fields are stored in FIELDS. | |
349 | EX_INFO is used to handle reading variable length insns. | |
350 | Return the length of the insn in bits, or 0 if no match, | |
351 | or -1 if an error occurs fetching data (memory_error_func will have | |
352 | been called). */ | |
bfc10abe DE |
353 | |
354 | static int | |
1c8f439e DE |
355 | extract_insn_normal (od, insn, ex_info, insn_value, fields, pc) |
356 | CGEN_OPCODE_DESC od; | |
bfc10abe | 357 | const CGEN_INSN *insn; |
1c8f439e | 358 | CGEN_EXTRACT_INFO *ex_info; |
5730d39d | 359 | CGEN_INSN_INT insn_value; |
bfc10abe | 360 | CGEN_FIELDS *fields; |
1c8f439e | 361 | bfd_vma pc; |
bfc10abe DE |
362 | { |
363 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
364 | const unsigned char *syn; | |
365 | ||
366 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); | |
367 | ||
1c8f439e | 368 | CGEN_INIT_EXTRACT (od); |
bfc10abe DE |
369 | |
370 | for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) | |
371 | { | |
372 | int length; | |
373 | ||
374 | if (CGEN_SYNTAX_CHAR_P (*syn)) | |
375 | continue; | |
376 | ||
1c8f439e DE |
377 | length = @arch@_cgen_extract_operand (od, CGEN_SYNTAX_FIELD (*syn), |
378 | ex_info, insn_value, fields, pc); | |
379 | if (length <= 0) | |
380 | return length; | |
bfc10abe DE |
381 | } |
382 | ||
383 | /* We recognized and successfully extracted this insn. */ | |
384 | return CGEN_INSN_BITSIZE (insn); | |
385 | } | |
386 | ||
387 | /* Default insn printer. | |
388 | ||
ab0bd049 | 389 | DIS_INFO is defined as `PTR' so the disassembler needn't know anything |
1c8f439e | 390 | about disassemble_info. */ |
bfc10abe DE |
391 | |
392 | static void | |
1c8f439e DE |
393 | print_insn_normal (od, dis_info, insn, fields, pc, length) |
394 | CGEN_OPCODE_DESC od; | |
ab0bd049 | 395 | PTR dis_info; |
bfc10abe DE |
396 | const CGEN_INSN *insn; |
397 | CGEN_FIELDS *fields; | |
398 | bfd_vma pc; | |
399 | int length; | |
400 | { | |
401 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
1c8f439e | 402 | disassemble_info *info = (disassemble_info *) dis_info; |
bfc10abe DE |
403 | const unsigned char *syn; |
404 | ||
1c8f439e | 405 | CGEN_INIT_PRINT (od); |
bfc10abe DE |
406 | |
407 | for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) | |
408 | { | |
409 | if (CGEN_SYNTAX_MNEMONIC_P (*syn)) | |
410 | { | |
411 | (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn)); | |
412 | continue; | |
413 | } | |
414 | if (CGEN_SYNTAX_CHAR_P (*syn)) | |
415 | { | |
416 | (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn)); | |
417 | continue; | |
418 | } | |
419 | ||
420 | /* We have an operand. */ | |
1c8f439e DE |
421 | @arch@_cgen_print_operand (od, CGEN_SYNTAX_FIELD (*syn), info, |
422 | fields, CGEN_INSN_ATTRS (insn), pc, length); | |
bfc10abe DE |
423 | } |
424 | } | |
425 | \f | |
1c8f439e DE |
426 | /* Utility to print an insn. |
427 | BUF is the base part of the insn, target byte order, BUFLEN bytes long. | |
428 | The result is the size of the insn in bytes or zero for an unknown insn | |
429 | or -1 if an error occurs fetching data (memory_error_func will have | |
430 | been called). */ | |
bfc10abe DE |
431 | |
432 | static int | |
1c8f439e DE |
433 | print_insn (od, pc, info, buf, buflen) |
434 | CGEN_OPCODE_DESC od; | |
bfc10abe DE |
435 | bfd_vma pc; |
436 | disassemble_info *info; | |
437 | char *buf; | |
438 | int buflen; | |
439 | { | |
bfc10abe DE |
440 | unsigned long insn_value; |
441 | const CGEN_INSN_LIST *insn_list; | |
1c8f439e DE |
442 | CGEN_EXTRACT_INFO ex_info; |
443 | ||
444 | ex_info.dis_info = info; | |
445 | ex_info.valid = (1 << CGEN_BASE_INSN_SIZE) - 1; | |
5730d39d | 446 | ex_info.insn_bytes = buf; |
bfc10abe DE |
447 | |
448 | switch (buflen) | |
449 | { | |
1c8f439e | 450 | case 1: |
bfc10abe DE |
451 | insn_value = buf[0]; |
452 | break; | |
1c8f439e | 453 | case 2: |
bfc10abe DE |
454 | insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf); |
455 | break; | |
1c8f439e | 456 | case 4: |
bfc10abe DE |
457 | insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf); |
458 | break; | |
459 | default: | |
460 | abort (); | |
461 | } | |
462 | ||
463 | /* The instructions are stored in hash lists. | |
464 | Pick the first one and keep trying until we find the right one. */ | |
465 | ||
1c8f439e | 466 | insn_list = CGEN_DIS_LOOKUP_INSN (od, buf, insn_value); |
bfc10abe DE |
467 | while (insn_list != NULL) |
468 | { | |
469 | const CGEN_INSN *insn = insn_list->insn; | |
bfc10abe DE |
470 | CGEN_FIELDS fields; |
471 | int length; | |
472 | ||
473 | #if 0 /* not needed as insn shouldn't be in hash lists if not supported */ | |
474 | /* Supported by this cpu? */ | |
1c8f439e | 475 | if (! @arch@_cgen_insn_supported (od, insn)) |
bfc10abe DE |
476 | continue; |
477 | #endif | |
478 | ||
479 | /* Basic bit mask must be correct. */ | |
480 | /* ??? May wish to allow target to defer this check until the extract | |
481 | handler. */ | |
5730d39d DE |
482 | if ((insn_value & CGEN_INSN_BASE_MASK (insn)) |
483 | == CGEN_INSN_BASE_VALUE (insn)) | |
bfc10abe DE |
484 | { |
485 | /* Printing is handled in two passes. The first pass parses the | |
486 | machine insn and extracts the fields. The second pass prints | |
487 | them. */ | |
488 | ||
1c8f439e DE |
489 | length = (*CGEN_EXTRACT_FN (insn)) (od, insn, &ex_info, insn_value, |
490 | &fields, pc); | |
491 | /* length < 0 -> error */ | |
492 | if (length < 0) | |
493 | return length; | |
bfc10abe DE |
494 | if (length > 0) |
495 | { | |
1c8f439e | 496 | (*CGEN_PRINT_FN (insn)) (od, info, insn, &fields, pc, length); |
bfc10abe DE |
497 | /* length is in bits, result is in bytes */ |
498 | return length / 8; | |
499 | } | |
500 | } | |
501 | ||
502 | insn_list = CGEN_DIS_NEXT_INSN (insn_list); | |
503 | } | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
1c8f439e DE |
508 | /* Default value for CGEN_PRINT_INSN. |
509 | The result is the size of the insn in bytes or zero for an unknown insn | |
510 | or -1 if an error occured fetching bytes. */ | |
511 | ||
512 | #ifndef CGEN_PRINT_INSN | |
513 | #define CGEN_PRINT_INSN default_print_insn | |
514 | #endif | |
515 | ||
516 | static int | |
517 | default_print_insn (od, pc, info) | |
518 | CGEN_OPCODE_DESC od; | |
519 | bfd_vma pc; | |
520 | disassemble_info *info; | |
521 | { | |
522 | char buf[CGEN_MAX_INSN_SIZE]; | |
523 | int status; | |
524 | ||
525 | /* Read the base part of the insn. */ | |
526 | ||
527 | status = (*info->read_memory_func) (pc, buf, CGEN_BASE_INSN_SIZE, info); | |
528 | if (status != 0) | |
529 | { | |
530 | (*info->memory_error_func) (status, pc, info); | |
531 | return -1; | |
532 | } | |
533 | ||
534 | return print_insn (od, pc, info, buf, CGEN_BASE_INSN_SIZE); | |
535 | } | |
536 | ||
bfc10abe DE |
537 | /* Main entry point. |
538 | Print one instruction from PC on INFO->STREAM. | |
539 | Return the size of the instruction (in bytes). */ | |
540 | ||
541 | int | |
542 | print_insn_@arch@ (pc, info) | |
543 | bfd_vma pc; | |
544 | disassemble_info *info; | |
545 | { | |
1c8f439e DE |
546 | int length; |
547 | static CGEN_OPCODE_DESC od = 0; | |
bfc10abe DE |
548 | int mach = info->mach; |
549 | int big_p = info->endian == BFD_ENDIAN_BIG; | |
550 | ||
1c8f439e DE |
551 | /* If we haven't initialized yet, initialize the opcode table. */ |
552 | if (! od) | |
bfc10abe | 553 | { |
1c8f439e DE |
554 | od = @arch@_cgen_opcode_open (mach, |
555 | big_p ? | |
556 | CGEN_ENDIAN_BIG | |
557 | : CGEN_ENDIAN_LITTLE); | |
558 | @arch@_cgen_init_dis (od); | |
bfc10abe | 559 | } |
1c8f439e DE |
560 | /* If we've switched cpu's, re-initialize. */ |
561 | /* ??? Perhaps we should use BFD_ENDIAN. */ | |
562 | else if (mach != CGEN_OPCODE_MACH (od) | |
563 | || (CGEN_OPCODE_ENDIAN (od) | |
564 | != (big_p ? CGEN_ENDIAN_BIG : CGEN_ENDIAN_LITTLE))) | |
bfc10abe | 565 | { |
1c8f439e | 566 | cgen_set_cpu (od, mach, big_p ? CGEN_ENDIAN_BIG : CGEN_ENDIAN_LITTLE); |
bfc10abe DE |
567 | } |
568 | ||
569 | /* We try to have as much common code as possible. | |
570 | But at this point some targets need to take over. */ | |
571 | /* ??? Some targets may need a hook elsewhere. Try to avoid this, | |
572 | but if not possible try to move this hook elsewhere rather than | |
573 | have two hooks. */ | |
1c8f439e DE |
574 | length = CGEN_PRINT_INSN (od, pc, info); |
575 | if (length > 0) | |
bfc10abe | 576 | return length; |
1c8f439e DE |
577 | if (length < 0) |
578 | return -1; | |
bfc10abe DE |
579 | |
580 | (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); | |
581 | return CGEN_DEFAULT_INSN_SIZE; | |
582 | } |