| 1 | /* Disassembler interface for targets using CGEN. -*- C -*- |
| 2 | CGEN: Cpu tools GENerator |
| 3 | |
| 4 | THIS FILE IS USED TO GENERATE @prefix@-dis.c. |
| 5 | |
| 6 | Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. |
| 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 |
| 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. */ |
| 23 | |
| 24 | #include "sysdep.h" |
| 25 | #include <stdio.h> |
| 26 | #include "ansidecl.h" |
| 27 | #include "dis-asm.h" |
| 28 | #include "bfd.h" |
| 29 | #include "symcat.h" |
| 30 | #include "@prefix@-opc.h" |
| 31 | #include "opintl.h" |
| 32 | |
| 33 | #undef INLINE |
| 34 | #ifdef __GNUC__ |
| 35 | #define INLINE __inline__ |
| 36 | #else |
| 37 | #define INLINE |
| 38 | #endif |
| 39 | |
| 40 | /* Default text to print if an instruction isn't recognized. */ |
| 41 | #define UNKNOWN_INSN_MSG _("*unknown*") |
| 42 | |
| 43 | static int extract_normal |
| 44 | PARAMS ((CGEN_OPCODE_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_BYTES, |
| 45 | unsigned int, int, int, int, long *)); |
| 46 | static void print_normal |
| 47 | PARAMS ((CGEN_OPCODE_DESC, PTR, long, unsigned int, bfd_vma, int)); |
| 48 | static void print_address |
| 49 | PARAMS ((CGEN_OPCODE_DESC, PTR, bfd_vma, unsigned int, bfd_vma, int)); |
| 50 | static void print_keyword |
| 51 | PARAMS ((CGEN_OPCODE_DESC, PTR, CGEN_KEYWORD *, long, unsigned int)); |
| 52 | static int extract_insn_normal |
| 53 | PARAMS ((CGEN_OPCODE_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *, |
| 54 | unsigned long, CGEN_FIELDS *, bfd_vma)); |
| 55 | static void print_insn_normal |
| 56 | PARAMS ((CGEN_OPCODE_DESC, PTR, const CGEN_INSN *, CGEN_FIELDS *, |
| 57 | bfd_vma, int)); |
| 58 | static int print_insn PARAMS ((CGEN_OPCODE_DESC, bfd_vma, |
| 59 | disassemble_info *, char *, int)); |
| 60 | static int default_print_insn |
| 61 | PARAMS ((CGEN_OPCODE_DESC, bfd_vma, disassemble_info *)); |
| 62 | \f |
| 63 | /* -- disassembler routines inserted here */ |
| 64 | \f |
| 65 | #if ! CGEN_INT_INSN_P |
| 66 | |
| 67 | /* Subroutine of extract_normal. */ |
| 68 | |
| 69 | static INLINE long |
| 70 | extract_1 (od, ex_info, start, length, word_length, bufp) |
| 71 | CGEN_OPCODE_DESC od; |
| 72 | CGEN_EXTRACT_INFO *info; |
| 73 | int start,length,word_length; |
| 74 | unsigned char *bufp; |
| 75 | { |
| 76 | unsigned long x,mask; |
| 77 | int shift; |
| 78 | int big_p = CGEN_OPCODE_INSN_ENDIAN (od) == CGEN_ENDIAN_BIG; |
| 79 | |
| 80 | /* FIXME: Need to use ex_info to ensure bytes have been fetched. */ |
| 81 | |
| 82 | switch (word_length) |
| 83 | { |
| 84 | case 8: |
| 85 | x = *bufp; |
| 86 | break; |
| 87 | case 16: |
| 88 | if (big_p) |
| 89 | x = bfd_getb16 (bufp); |
| 90 | else |
| 91 | x = bfd_getl16 (bufp); |
| 92 | break; |
| 93 | case 24: |
| 94 | /* ??? This may need reworking as these cases don't necessarily |
| 95 | want the first byte and the last two bytes handled like this. */ |
| 96 | if (big_p) |
| 97 | x = (bfd_getb8 (bufp) << 16) | bfd_getb16 (bufp + 1); |
| 98 | else |
| 99 | x = bfd_getl16 (bufp) | (bfd_getb8 (bufp + 2) << 16); |
| 100 | break; |
| 101 | case 32: |
| 102 | if (big_p) |
| 103 | x = bfd_getb32 (bufp); |
| 104 | else |
| 105 | x = bfd_getl32 (bufp); |
| 106 | break; |
| 107 | default : |
| 108 | abort (); |
| 109 | } |
| 110 | |
| 111 | /* Written this way to avoid undefined behaviour. */ |
| 112 | mask = (((1L << (length - 1)) - 1) << 1) | 1; |
| 113 | if (CGEN_INSN_LSB0_P) |
| 114 | shift = start; |
| 115 | else |
| 116 | shift = (word_length - (start + length)); |
| 117 | return (x >> shift) & mask; |
| 118 | } |
| 119 | |
| 120 | #endif /* ! CGEN_INT_INSN_P */ |
| 121 | |
| 122 | /* Default extraction routine. |
| 123 | |
| 124 | ATTRS is a mask of the boolean attributes. We only need `unsigned', |
| 125 | but for generality we take a bitmask of all of them. */ |
| 126 | |
| 127 | /* ??? This doesn't handle bfd_vma's. Create another function when |
| 128 | necessary. */ |
| 129 | |
| 130 | static int |
| 131 | extract_normal (od, ex_info, insn_value, attrs, start, length, total_length, valuep) |
| 132 | CGEN_OPCODE_DESC od; |
| 133 | CGEN_EXTRACT_INFO *ex_info; |
| 134 | CGEN_INSN_BYTES insn_value; |
| 135 | unsigned int attrs; |
| 136 | int start, length, total_length; |
| 137 | long *valuep; |
| 138 | { |
| 139 | unsigned long value; |
| 140 | |
| 141 | /* If LENGTH is zero, this operand doesn't contribute to the value |
| 142 | so give it a standard value of zero. */ |
| 143 | if (length == 0) |
| 144 | { |
| 145 | *valuep = 0; |
| 146 | return 1; |
| 147 | } |
| 148 | |
| 149 | #if CGEN_INT_INSN_P |
| 150 | |
| 151 | { |
| 152 | /* Written this way to avoid undefined behaviour. */ |
| 153 | unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1; |
| 154 | |
| 155 | if (CGEN_INSN_LSB0_P) |
| 156 | value = insn_value >> start; |
| 157 | else |
| 158 | value = insn_value >> (total_length - (start + length)); |
| 159 | value &= mask; |
| 160 | /* sign extend? */ |
| 161 | if (! (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_UNSIGNED)) |
| 162 | && (value & (1L << (length - 1)))) |
| 163 | value |= ~mask; |
| 164 | } |
| 165 | |
| 166 | #else |
| 167 | |
| 168 | /* The hard case is probably too slow for the normal cases. |
| 169 | It's certainly more difficult to understand than the normal case. |
| 170 | Thus this is split into two. Keep it that way. The hard case is defined |
| 171 | to be when a field straddles a (loosely defined) word boundary |
| 172 | (??? which may require target specific help to determine). */ |
| 173 | |
| 174 | #if 0 /*wip*/ |
| 175 | |
| 176 | #define HARD_CASE_P 0 /* FIXME:wip */ |
| 177 | |
| 178 | if (HARD_CASE_P) |
| 179 | { |
| 180 | } |
| 181 | #endif |
| 182 | else |
| 183 | { |
| 184 | unsigned char *bufp = (unsigned char *) insn_value; |
| 185 | |
| 186 | if (length > 32) |
| 187 | abort (); |
| 188 | |
| 189 | /* Adjust start,total_length,bufp to point to the pseudo-word that holds |
| 190 | the value. For example in a 48 bit insn where the value to insert |
| 191 | (say an immediate value) is the last 16 bits then word_length here |
| 192 | would be 16. To handle a 24 bit insn with an 18 bit immediate, |
| 193 | extract_1 handles 24 bits (using a combination of bfd_get8,16). */ |
| 194 | |
| 195 | if (total_length > 32) |
| 196 | { |
| 197 | int needed_width = start % 8 + length; |
| 198 | int fetch_length = (needed_width <= 8 ? 8 |
| 199 | : needed_width <= 16 ? 16 |
| 200 | : 32); |
| 201 | |
| 202 | if (CGEN_INSN_LSB0_P) |
| 203 | { |
| 204 | if (CGEN_INSN_WORD_ENDIAN (od) == CGEN_ENDIAN_BIG) |
| 205 | { |
| 206 | abort (); /* wip */ |
| 207 | } |
| 208 | else |
| 209 | { |
| 210 | int offset = start & ~7; |
| 211 | |
| 212 | bufp += offset / 8; |
| 213 | start -= offset; |
| 214 | total_length -= offset; |
| 215 | } |
| 216 | } |
| 217 | else |
| 218 | { |
| 219 | if (CGEN_INSN_WORD_ENDIAN (od) == CGEN_ENDIAN_BIG) |
| 220 | { |
| 221 | int offset = start & ~7; |
| 222 | |
| 223 | bufp += offset / 8; |
| 224 | start -= offset; |
| 225 | total_length -= offset; |
| 226 | } |
| 227 | else |
| 228 | { |
| 229 | abort (); /* wip */ |
| 230 | } |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | /* FIXME: which bytes are being extracted have been lost. */ |
| 235 | value = extract_1 (od, ex_info, start, length, total_length, bufp); |
| 236 | } |
| 237 | |
| 238 | #endif /* ! CGEN_INT_INSN_P */ |
| 239 | |
| 240 | *valuep = value; |
| 241 | |
| 242 | /* FIXME: for now */ |
| 243 | return 1; |
| 244 | } |
| 245 | |
| 246 | /* Default print handler. */ |
| 247 | |
| 248 | static void |
| 249 | print_normal (od, dis_info, value, attrs, pc, length) |
| 250 | CGEN_OPCODE_DESC od; |
| 251 | PTR dis_info; |
| 252 | long value; |
| 253 | unsigned int attrs; |
| 254 | bfd_vma pc; |
| 255 | int length; |
| 256 | { |
| 257 | disassemble_info *info = (disassemble_info *) dis_info; |
| 258 | |
| 259 | #ifdef CGEN_PRINT_NORMAL |
| 260 | CGEN_PRINT_NORMAL (od, info, value, attrs, pc, length); |
| 261 | #endif |
| 262 | |
| 263 | /* Print the operand as directed by the attributes. */ |
| 264 | if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) |
| 265 | ; /* nothing to do */ |
| 266 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_UNSIGNED)) |
| 267 | (*info->fprintf_func) (info->stream, "0x%lx", value); |
| 268 | else |
| 269 | (*info->fprintf_func) (info->stream, "%ld", value); |
| 270 | } |
| 271 | |
| 272 | /* Default address handler. */ |
| 273 | |
| 274 | static void |
| 275 | print_address (od, dis_info, value, attrs, pc, length) |
| 276 | CGEN_OPCODE_DESC od; |
| 277 | PTR dis_info; |
| 278 | bfd_vma value; |
| 279 | unsigned int attrs; |
| 280 | bfd_vma pc; |
| 281 | int length; |
| 282 | { |
| 283 | disassemble_info *info = (disassemble_info *) dis_info; |
| 284 | |
| 285 | #ifdef CGEN_PRINT_ADDRESS |
| 286 | CGEN_PRINT_ADDRESS (od, info, value, attrs, pc, length); |
| 287 | #endif |
| 288 | |
| 289 | /* Print the operand as directed by the attributes. */ |
| 290 | if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) |
| 291 | ; /* nothing to do */ |
| 292 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR)) |
| 293 | (*info->print_address_func) (value, info); |
| 294 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR)) |
| 295 | (*info->print_address_func) (value, info); |
| 296 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_UNSIGNED)) |
| 297 | (*info->fprintf_func) (info->stream, "0x%lx", (long) value); |
| 298 | else |
| 299 | (*info->fprintf_func) (info->stream, "%ld", (long) value); |
| 300 | } |
| 301 | |
| 302 | /* Keyword print handler. */ |
| 303 | |
| 304 | static void |
| 305 | print_keyword (od, dis_info, keyword_table, value, attrs) |
| 306 | CGEN_OPCODE_DESC od; |
| 307 | PTR dis_info; |
| 308 | CGEN_KEYWORD *keyword_table; |
| 309 | long value; |
| 310 | unsigned int attrs; |
| 311 | { |
| 312 | disassemble_info *info = (disassemble_info *) dis_info; |
| 313 | const CGEN_KEYWORD_ENTRY *ke; |
| 314 | |
| 315 | ke = cgen_keyword_lookup_value (keyword_table, value); |
| 316 | if (ke != NULL) |
| 317 | (*info->fprintf_func) (info->stream, "%s", ke->name); |
| 318 | else |
| 319 | (*info->fprintf_func) (info->stream, "???"); |
| 320 | } |
| 321 | \f |
| 322 | /* Default insn extractor. |
| 323 | |
| 324 | INSN_VALUE is the first CGEN_BASE_INSN_SIZE bytes, translated to host order. |
| 325 | The extracted fields are stored in FIELDS. |
| 326 | EX_INFO is used to handle reading variable length insns. |
| 327 | Return the length of the insn in bits, or 0 if no match, |
| 328 | or -1 if an error occurs fetching data (memory_error_func will have |
| 329 | been called). */ |
| 330 | |
| 331 | static int |
| 332 | extract_insn_normal (od, insn, ex_info, insn_value, fields, pc) |
| 333 | CGEN_OPCODE_DESC od; |
| 334 | const CGEN_INSN *insn; |
| 335 | CGEN_EXTRACT_INFO *ex_info; |
| 336 | unsigned long insn_value; |
| 337 | CGEN_FIELDS *fields; |
| 338 | bfd_vma pc; |
| 339 | { |
| 340 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); |
| 341 | const unsigned char *syn; |
| 342 | |
| 343 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); |
| 344 | |
| 345 | CGEN_INIT_EXTRACT (od); |
| 346 | |
| 347 | for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) |
| 348 | { |
| 349 | int length; |
| 350 | |
| 351 | if (CGEN_SYNTAX_CHAR_P (*syn)) |
| 352 | continue; |
| 353 | |
| 354 | length = @arch@_cgen_extract_operand (od, CGEN_SYNTAX_FIELD (*syn), |
| 355 | ex_info, insn_value, fields, pc); |
| 356 | if (length <= 0) |
| 357 | return length; |
| 358 | } |
| 359 | |
| 360 | /* We recognized and successfully extracted this insn. */ |
| 361 | return CGEN_INSN_BITSIZE (insn); |
| 362 | } |
| 363 | |
| 364 | /* Default insn printer. |
| 365 | |
| 366 | DIS_INFO is defined as `PTR' so the disassembler needn't know anything |
| 367 | about disassemble_info. */ |
| 368 | |
| 369 | static void |
| 370 | print_insn_normal (od, dis_info, insn, fields, pc, length) |
| 371 | CGEN_OPCODE_DESC od; |
| 372 | PTR dis_info; |
| 373 | const CGEN_INSN *insn; |
| 374 | CGEN_FIELDS *fields; |
| 375 | bfd_vma pc; |
| 376 | int length; |
| 377 | { |
| 378 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); |
| 379 | disassemble_info *info = (disassemble_info *) dis_info; |
| 380 | const unsigned char *syn; |
| 381 | |
| 382 | CGEN_INIT_PRINT (od); |
| 383 | |
| 384 | for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) |
| 385 | { |
| 386 | if (CGEN_SYNTAX_MNEMONIC_P (*syn)) |
| 387 | { |
| 388 | (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn)); |
| 389 | continue; |
| 390 | } |
| 391 | if (CGEN_SYNTAX_CHAR_P (*syn)) |
| 392 | { |
| 393 | (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn)); |
| 394 | continue; |
| 395 | } |
| 396 | |
| 397 | /* We have an operand. */ |
| 398 | @arch@_cgen_print_operand (od, CGEN_SYNTAX_FIELD (*syn), info, |
| 399 | fields, CGEN_INSN_ATTRS (insn), pc, length); |
| 400 | } |
| 401 | } |
| 402 | \f |
| 403 | /* Utility to print an insn. |
| 404 | BUF is the base part of the insn, target byte order, BUFLEN bytes long. |
| 405 | The result is the size of the insn in bytes or zero for an unknown insn |
| 406 | or -1 if an error occurs fetching data (memory_error_func will have |
| 407 | been called). */ |
| 408 | |
| 409 | static int |
| 410 | print_insn (od, pc, info, buf, buflen) |
| 411 | CGEN_OPCODE_DESC od; |
| 412 | bfd_vma pc; |
| 413 | disassemble_info *info; |
| 414 | char *buf; |
| 415 | int buflen; |
| 416 | { |
| 417 | unsigned long insn_value; |
| 418 | const CGEN_INSN_LIST *insn_list; |
| 419 | CGEN_EXTRACT_INFO ex_info; |
| 420 | |
| 421 | ex_info.dis_info = info; |
| 422 | ex_info.valid = (1 << CGEN_BASE_INSN_SIZE) - 1; |
| 423 | ex_info.bytes = buf; |
| 424 | |
| 425 | switch (buflen) |
| 426 | { |
| 427 | case 1: |
| 428 | insn_value = buf[0]; |
| 429 | break; |
| 430 | case 2: |
| 431 | insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf); |
| 432 | break; |
| 433 | case 4: |
| 434 | insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf); |
| 435 | break; |
| 436 | default: |
| 437 | abort (); |
| 438 | } |
| 439 | |
| 440 | /* The instructions are stored in hash lists. |
| 441 | Pick the first one and keep trying until we find the right one. */ |
| 442 | |
| 443 | insn_list = CGEN_DIS_LOOKUP_INSN (od, buf, insn_value); |
| 444 | while (insn_list != NULL) |
| 445 | { |
| 446 | const CGEN_INSN *insn = insn_list->insn; |
| 447 | CGEN_FIELDS fields; |
| 448 | int length; |
| 449 | |
| 450 | #if 0 /* not needed as insn shouldn't be in hash lists if not supported */ |
| 451 | /* Supported by this cpu? */ |
| 452 | if (! @arch@_cgen_insn_supported (od, insn)) |
| 453 | continue; |
| 454 | #endif |
| 455 | |
| 456 | /* Basic bit mask must be correct. */ |
| 457 | /* ??? May wish to allow target to defer this check until the extract |
| 458 | handler. */ |
| 459 | if ((insn_value & CGEN_INSN_MASK (insn)) == CGEN_INSN_VALUE (insn)) |
| 460 | { |
| 461 | /* Printing is handled in two passes. The first pass parses the |
| 462 | machine insn and extracts the fields. The second pass prints |
| 463 | them. */ |
| 464 | |
| 465 | length = (*CGEN_EXTRACT_FN (insn)) (od, insn, &ex_info, insn_value, |
| 466 | &fields, pc); |
| 467 | /* length < 0 -> error */ |
| 468 | if (length < 0) |
| 469 | return length; |
| 470 | if (length > 0) |
| 471 | { |
| 472 | (*CGEN_PRINT_FN (insn)) (od, info, insn, &fields, pc, length); |
| 473 | /* length is in bits, result is in bytes */ |
| 474 | return length / 8; |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | insn_list = CGEN_DIS_NEXT_INSN (insn_list); |
| 479 | } |
| 480 | |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | /* Default value for CGEN_PRINT_INSN. |
| 485 | The result is the size of the insn in bytes or zero for an unknown insn |
| 486 | or -1 if an error occured fetching bytes. */ |
| 487 | |
| 488 | #ifndef CGEN_PRINT_INSN |
| 489 | #define CGEN_PRINT_INSN default_print_insn |
| 490 | #endif |
| 491 | |
| 492 | static int |
| 493 | default_print_insn (od, pc, info) |
| 494 | CGEN_OPCODE_DESC od; |
| 495 | bfd_vma pc; |
| 496 | disassemble_info *info; |
| 497 | { |
| 498 | char buf[CGEN_MAX_INSN_SIZE]; |
| 499 | int status; |
| 500 | |
| 501 | /* Read the base part of the insn. */ |
| 502 | |
| 503 | status = (*info->read_memory_func) (pc, buf, CGEN_BASE_INSN_SIZE, info); |
| 504 | if (status != 0) |
| 505 | { |
| 506 | (*info->memory_error_func) (status, pc, info); |
| 507 | return -1; |
| 508 | } |
| 509 | |
| 510 | return print_insn (od, pc, info, buf, CGEN_BASE_INSN_SIZE); |
| 511 | } |
| 512 | |
| 513 | /* Main entry point. |
| 514 | Print one instruction from PC on INFO->STREAM. |
| 515 | Return the size of the instruction (in bytes). */ |
| 516 | |
| 517 | int |
| 518 | print_insn_@arch@ (pc, info) |
| 519 | bfd_vma pc; |
| 520 | disassemble_info *info; |
| 521 | { |
| 522 | int length; |
| 523 | static CGEN_OPCODE_DESC od = 0; |
| 524 | int mach = info->mach; |
| 525 | int big_p = info->endian == BFD_ENDIAN_BIG; |
| 526 | |
| 527 | /* If we haven't initialized yet, initialize the opcode table. */ |
| 528 | if (! od) |
| 529 | { |
| 530 | od = @arch@_cgen_opcode_open (mach, |
| 531 | big_p ? |
| 532 | CGEN_ENDIAN_BIG |
| 533 | : CGEN_ENDIAN_LITTLE); |
| 534 | @arch@_cgen_init_dis (od); |
| 535 | } |
| 536 | /* If we've switched cpu's, re-initialize. */ |
| 537 | /* ??? Perhaps we should use BFD_ENDIAN. */ |
| 538 | else if (mach != CGEN_OPCODE_MACH (od) |
| 539 | || (CGEN_OPCODE_ENDIAN (od) |
| 540 | != (big_p ? CGEN_ENDIAN_BIG : CGEN_ENDIAN_LITTLE))) |
| 541 | { |
| 542 | cgen_set_cpu (od, mach, big_p ? CGEN_ENDIAN_BIG : CGEN_ENDIAN_LITTLE); |
| 543 | } |
| 544 | |
| 545 | /* We try to have as much common code as possible. |
| 546 | But at this point some targets need to take over. */ |
| 547 | /* ??? Some targets may need a hook elsewhere. Try to avoid this, |
| 548 | but if not possible try to move this hook elsewhere rather than |
| 549 | have two hooks. */ |
| 550 | length = CGEN_PRINT_INSN (od, pc, info); |
| 551 | if (length > 0) |
| 552 | return length; |
| 553 | if (length < 0) |
| 554 | return -1; |
| 555 | |
| 556 | (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); |
| 557 | return CGEN_DEFAULT_INSN_SIZE; |
| 558 | } |