1 /* Disassembler interface for targets using CGEN. -*- C -*- 2 CGEN: Cpu tools GENerator 3 4 THIS FILE IS MACHINE GENERATED WITH CGEN. 5 - the resultant file is machine generated, cgen-dis.in isn't 6 7 Copyright (C) 1996-2016 Free Software Foundation, Inc. 8 9 This file is part of libopcodes. 10 11 This library is free software; you can redistribute it and/or modify 12 it under the terms of the GNU General Public License as published by 13 the Free Software Foundation; either version 3, or (at your option) 14 any later version. 15 16 It is distributed in the hope that it will be useful, but WITHOUT 17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 18 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 19 License for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with this program; if not, write to the Free Software Foundation, Inc., 23 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 24 25 /* ??? Eventually more and more of this stuff can go to cpu-independent files. 26 Keep that in mind. */ 27 28 #include "sysdep.h" 29 #include <stdio.h> 30 #include "ansidecl.h" 31 #include "dis-asm.h" 32 #include "bfd.h" 33 #include "symcat.h" 34 #include "libiberty.h" 35 #include "ip2k-desc.h" 36 #include "ip2k-opc.h" 37 #include "opintl.h" 38 39 /* Default text to print if an instruction isn't recognized. */ 40 #define UNKNOWN_INSN_MSG _("*unknown*") 41 42 static void print_normal 43 (CGEN_CPU_DESC, void *, long, unsigned int, bfd_vma, int); 44 static void print_address 45 (CGEN_CPU_DESC, void *, bfd_vma, unsigned int, bfd_vma, int) ATTRIBUTE_UNUSED; 46 static void print_keyword 47 (CGEN_CPU_DESC, void *, CGEN_KEYWORD *, long, unsigned int) ATTRIBUTE_UNUSED; 48 static void print_insn_normal 49 (CGEN_CPU_DESC, void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int); 50 static int print_insn 51 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, unsigned); 52 static int default_print_insn 53 (CGEN_CPU_DESC, bfd_vma, disassemble_info *) ATTRIBUTE_UNUSED; 54 static int read_insn 55 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, int, CGEN_EXTRACT_INFO *, 56 unsigned long *); 57 58 /* -- disassembler routines inserted here. */ 60 61 /* -- dis.c */ 62 63 static void 64 print_fr (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 65 void * dis_info, 66 long value, 67 unsigned int attrs ATTRIBUTE_UNUSED, 68 bfd_vma pc ATTRIBUTE_UNUSED, 69 int length ATTRIBUTE_UNUSED) 70 { 71 disassemble_info *info = (disassemble_info *) dis_info; 72 const CGEN_KEYWORD_ENTRY *ke; 73 extern CGEN_KEYWORD ip2k_cgen_opval_register_names; 74 long offsettest; 75 long offsetvalue; 76 77 if (value == 0) /* This is (IP). */ 78 { 79 (*info->fprintf_func) (info->stream, "%s", "(IP)"); 80 return; 81 } 82 83 offsettest = value >> 7; 84 offsetvalue = value & 0x7F; 85 86 /* Check to see if first two bits are 10 -> (DP). */ 87 if (offsettest == 2) 88 { 89 if (offsetvalue == 0) 90 (*info->fprintf_func) (info->stream, "%s","(DP)"); 91 else 92 (*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue, "(DP)"); 93 return; 94 } 95 96 /* Check to see if first two bits are 11 -> (SP). */ 97 if (offsettest == 3) 98 { 99 if (offsetvalue == 0) 100 (*info->fprintf_func) (info->stream, "%s", "(SP)"); 101 else 102 (*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue,"(SP)"); 103 return; 104 } 105 106 /* Attempt to print as a register keyword. */ 107 ke = cgen_keyword_lookup_value (& ip2k_cgen_opval_register_names, value); 108 109 if (ke != NULL) 110 (*info->fprintf_func) (info->stream, "%s", ke->name); 111 else 112 /* Print as an address literal. */ 113 (*info->fprintf_func) (info->stream, "$%02lx", value); 114 } 115 116 static void 117 print_dollarhex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 118 void * dis_info, 119 long value, 120 unsigned int attrs ATTRIBUTE_UNUSED, 121 bfd_vma pc ATTRIBUTE_UNUSED, 122 int length ATTRIBUTE_UNUSED) 123 { 124 disassemble_info *info = (disassemble_info *) dis_info; 125 126 (*info->fprintf_func) (info->stream, "$%lx", value); 127 } 128 129 static void 130 print_dollarhex8 (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 131 void * dis_info, 132 long value, 133 unsigned int attrs ATTRIBUTE_UNUSED, 134 bfd_vma pc ATTRIBUTE_UNUSED, 135 int length ATTRIBUTE_UNUSED) 136 { 137 disassemble_info *info = (disassemble_info *) dis_info; 138 139 (*info->fprintf_func) (info->stream, "$%02lx", value); 140 } 141 142 static void 143 print_dollarhex_addr16h (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 144 void * dis_info, 145 long value, 146 unsigned int attrs ATTRIBUTE_UNUSED, 147 bfd_vma pc ATTRIBUTE_UNUSED, 148 int length ATTRIBUTE_UNUSED) 149 { 150 disassemble_info *info = (disassemble_info *) dis_info; 151 152 /* This is a loadh instruction. Shift the value to the left 153 by 8 bits so that disassembled code will reassemble properly. */ 154 value = ((value << 8) & 0xFF00); 155 156 (*info->fprintf_func) (info->stream, "$%04lx", value); 157 } 158 159 static void 160 print_dollarhex_addr16l (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 161 void * dis_info, 162 long value, 163 unsigned int attrs ATTRIBUTE_UNUSED, 164 bfd_vma pc ATTRIBUTE_UNUSED, 165 int length ATTRIBUTE_UNUSED) 166 { 167 disassemble_info *info = (disassemble_info *) dis_info; 168 169 (*info->fprintf_func) (info->stream, "$%04lx", value); 170 } 171 172 static void 173 print_dollarhex_p (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 174 void * dis_info, 175 long value, 176 unsigned int attrs ATTRIBUTE_UNUSED, 177 bfd_vma pc ATTRIBUTE_UNUSED, 178 int length ATTRIBUTE_UNUSED) 179 { 180 disassemble_info *info = (disassemble_info *) dis_info; 181 182 value = ((value << 14) & 0x1C000); 183 ;value = (value & 0x1FFFF); 184 (*info->fprintf_func) (info->stream, "$%05lx", value); 185 } 186 187 static void 188 print_dollarhex_cj (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 189 void * dis_info, 190 long value, 191 unsigned int attrs ATTRIBUTE_UNUSED, 192 bfd_vma pc ATTRIBUTE_UNUSED, 193 int length ATTRIBUTE_UNUSED) 194 { 195 disassemble_info *info = (disassemble_info *) dis_info; 196 197 value = ((value << 1) & 0x1FFFF); 198 (*info->fprintf_func) (info->stream, "$%05lx", value); 199 } 200 201 static void 202 print_decimal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 203 void * dis_info, 204 long value, 205 unsigned int attrs ATTRIBUTE_UNUSED, 206 bfd_vma pc ATTRIBUTE_UNUSED, 207 int length ATTRIBUTE_UNUSED) 208 { 209 disassemble_info *info = (disassemble_info *) dis_info; 210 211 (*info->fprintf_func) (info->stream, "%ld", value); 212 } 213 214 215 216 /* -- */ 217 218 void ip2k_cgen_print_operand 219 (CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *, void const *, bfd_vma, int); 220 221 /* Main entry point for printing operands. 222 XINFO is a `void *' and not a `disassemble_info *' to not put a requirement 223 of dis-asm.h on cgen.h. 224 225 This function is basically just a big switch statement. Earlier versions 226 used tables to look up the function to use, but 227 - if the table contains both assembler and disassembler functions then 228 the disassembler contains much of the assembler and vice-versa, 229 - there's a lot of inlining possibilities as things grow, 230 - using a switch statement avoids the function call overhead. 231 232 This function could be moved into `print_insn_normal', but keeping it 233 separate makes clear the interface between `print_insn_normal' and each of 234 the handlers. */ 235 236 void 237 ip2k_cgen_print_operand (CGEN_CPU_DESC cd, 238 int opindex, 239 void * xinfo, 240 CGEN_FIELDS *fields, 241 void const *attrs ATTRIBUTE_UNUSED, 242 bfd_vma pc, 243 int length) 244 { 245 disassemble_info *info = (disassemble_info *) xinfo; 246 247 switch (opindex) 248 { 249 case IP2K_OPERAND_ADDR16CJP : 250 print_dollarhex_cj (cd, info, fields->f_addr16cjp, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length); 251 break; 252 case IP2K_OPERAND_ADDR16H : 253 print_dollarhex_addr16h (cd, info, fields->f_imm8, 0, pc, length); 254 break; 255 case IP2K_OPERAND_ADDR16L : 256 print_dollarhex_addr16l (cd, info, fields->f_imm8, 0, pc, length); 257 break; 258 case IP2K_OPERAND_ADDR16P : 259 print_dollarhex_p (cd, info, fields->f_page3, 0, pc, length); 260 break; 261 case IP2K_OPERAND_BITNO : 262 print_decimal (cd, info, fields->f_bitno, 0, pc, length); 263 break; 264 case IP2K_OPERAND_CBIT : 265 print_normal (cd, info, 0, 0, pc, length); 266 break; 267 case IP2K_OPERAND_DCBIT : 268 print_normal (cd, info, 0, 0, pc, length); 269 break; 270 case IP2K_OPERAND_FR : 271 print_fr (cd, info, fields->f_reg, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length); 272 break; 273 case IP2K_OPERAND_LIT8 : 274 print_dollarhex8 (cd, info, fields->f_imm8, 0|(1<<CGEN_OPERAND_SIGNED), pc, length); 275 break; 276 case IP2K_OPERAND_PABITS : 277 print_normal (cd, info, 0, 0, pc, length); 278 break; 279 case IP2K_OPERAND_RETI3 : 280 print_dollarhex (cd, info, fields->f_reti3, 0, pc, length); 281 break; 282 case IP2K_OPERAND_ZBIT : 283 print_normal (cd, info, 0, 0, pc, length); 284 break; 285 286 default : 287 /* xgettext:c-format */ 288 fprintf (stderr, _("Unrecognized field %d while printing insn.\n"), 289 opindex); 290 abort (); 291 } 292 } 293 294 cgen_print_fn * const ip2k_cgen_print_handlers[] = 295 { 296 print_insn_normal, 297 }; 298 299 300 void 301 ip2k_cgen_init_dis (CGEN_CPU_DESC cd) 302 { 303 ip2k_cgen_init_opcode_table (cd); 304 ip2k_cgen_init_ibld_table (cd); 305 cd->print_handlers = & ip2k_cgen_print_handlers[0]; 306 cd->print_operand = ip2k_cgen_print_operand; 307 } 308 309 310 /* Default print handler. */ 312 313 static void 314 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 315 void *dis_info, 316 long value, 317 unsigned int attrs, 318 bfd_vma pc ATTRIBUTE_UNUSED, 319 int length ATTRIBUTE_UNUSED) 320 { 321 disassemble_info *info = (disassemble_info *) dis_info; 322 323 /* Print the operand as directed by the attributes. */ 324 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) 325 ; /* nothing to do */ 326 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) 327 (*info->fprintf_func) (info->stream, "%ld", value); 328 else 329 (*info->fprintf_func) (info->stream, "0x%lx", value); 330 } 331 332 /* Default address handler. */ 333 334 static void 335 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 336 void *dis_info, 337 bfd_vma value, 338 unsigned int attrs, 339 bfd_vma pc ATTRIBUTE_UNUSED, 340 int length ATTRIBUTE_UNUSED) 341 { 342 disassemble_info *info = (disassemble_info *) dis_info; 343 344 /* Print the operand as directed by the attributes. */ 345 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) 346 ; /* Nothing to do. */ 347 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR)) 348 (*info->print_address_func) (value, info); 349 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR)) 350 (*info->print_address_func) (value, info); 351 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) 352 (*info->fprintf_func) (info->stream, "%ld", (long) value); 353 else 354 (*info->fprintf_func) (info->stream, "0x%lx", (long) value); 355 } 356 357 /* Keyword print handler. */ 358 359 static void 360 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 361 void *dis_info, 362 CGEN_KEYWORD *keyword_table, 363 long value, 364 unsigned int attrs ATTRIBUTE_UNUSED) 365 { 366 disassemble_info *info = (disassemble_info *) dis_info; 367 const CGEN_KEYWORD_ENTRY *ke; 368 369 ke = cgen_keyword_lookup_value (keyword_table, value); 370 if (ke != NULL) 371 (*info->fprintf_func) (info->stream, "%s", ke->name); 372 else 373 (*info->fprintf_func) (info->stream, "???"); 374 } 375 376 /* Default insn printer. 378 379 DIS_INFO is defined as `void *' so the disassembler needn't know anything 380 about disassemble_info. */ 381 382 static void 383 print_insn_normal (CGEN_CPU_DESC cd, 384 void *dis_info, 385 const CGEN_INSN *insn, 386 CGEN_FIELDS *fields, 387 bfd_vma pc, 388 int length) 389 { 390 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); 391 disassemble_info *info = (disassemble_info *) dis_info; 392 const CGEN_SYNTAX_CHAR_TYPE *syn; 393 394 CGEN_INIT_PRINT (cd); 395 396 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) 397 { 398 if (CGEN_SYNTAX_MNEMONIC_P (*syn)) 399 { 400 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn)); 401 continue; 402 } 403 if (CGEN_SYNTAX_CHAR_P (*syn)) 404 { 405 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn)); 406 continue; 407 } 408 409 /* We have an operand. */ 410 ip2k_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info, 411 fields, CGEN_INSN_ATTRS (insn), pc, length); 412 } 413 } 414 415 /* Subroutine of print_insn. Reads an insn into the given buffers and updates 417 the extract info. 418 Returns 0 if all is well, non-zero otherwise. */ 419 420 static int 421 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 422 bfd_vma pc, 423 disassemble_info *info, 424 bfd_byte *buf, 425 int buflen, 426 CGEN_EXTRACT_INFO *ex_info, 427 unsigned long *insn_value) 428 { 429 int status = (*info->read_memory_func) (pc, buf, buflen, info); 430 431 if (status != 0) 432 { 433 (*info->memory_error_func) (status, pc, info); 434 return -1; 435 } 436 437 ex_info->dis_info = info; 438 ex_info->valid = (1 << buflen) - 1; 439 ex_info->insn_bytes = buf; 440 441 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG); 442 return 0; 443 } 444 445 /* Utility to print an insn. 446 BUF is the base part of the insn, target byte order, BUFLEN bytes long. 447 The result is the size of the insn in bytes or zero for an unknown insn 448 or -1 if an error occurs fetching data (memory_error_func will have 449 been called). */ 450 451 static int 452 print_insn (CGEN_CPU_DESC cd, 453 bfd_vma pc, 454 disassemble_info *info, 455 bfd_byte *buf, 456 unsigned int buflen) 457 { 458 CGEN_INSN_INT insn_value; 459 const CGEN_INSN_LIST *insn_list; 460 CGEN_EXTRACT_INFO ex_info; 461 int basesize; 462 463 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */ 464 basesize = cd->base_insn_bitsize < buflen * 8 ? 465 cd->base_insn_bitsize : buflen * 8; 466 insn_value = cgen_get_insn_value (cd, buf, basesize); 467 468 469 /* Fill in ex_info fields like read_insn would. Don't actually call 470 read_insn, since the incoming buffer is already read (and possibly 471 modified a la m32r). */ 472 ex_info.valid = (1 << buflen) - 1; 473 ex_info.dis_info = info; 474 ex_info.insn_bytes = buf; 475 476 /* The instructions are stored in hash lists. 477 Pick the first one and keep trying until we find the right one. */ 478 479 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value); 480 while (insn_list != NULL) 481 { 482 const CGEN_INSN *insn = insn_list->insn; 483 CGEN_FIELDS fields; 484 int length; 485 unsigned long insn_value_cropped; 486 487 #ifdef CGEN_VALIDATE_INSN_SUPPORTED 488 /* Not needed as insn shouldn't be in hash lists if not supported. */ 489 /* Supported by this cpu? */ 490 if (! ip2k_cgen_insn_supported (cd, insn)) 491 { 492 insn_list = CGEN_DIS_NEXT_INSN (insn_list); 493 continue; 494 } 495 #endif 496 497 /* Basic bit mask must be correct. */ 498 /* ??? May wish to allow target to defer this check until the extract 499 handler. */ 500 501 /* Base size may exceed this instruction's size. Extract the 502 relevant part from the buffer. */ 503 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen && 504 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) 505 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn), 506 info->endian == BFD_ENDIAN_BIG); 507 else 508 insn_value_cropped = insn_value; 509 510 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn)) 511 == CGEN_INSN_BASE_VALUE (insn)) 512 { 513 /* Printing is handled in two passes. The first pass parses the 514 machine insn and extracts the fields. The second pass prints 515 them. */ 516 517 /* Make sure the entire insn is loaded into insn_value, if it 518 can fit. */ 519 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) && 520 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) 521 { 522 unsigned long full_insn_value; 523 int rc = read_insn (cd, pc, info, buf, 524 CGEN_INSN_BITSIZE (insn) / 8, 525 & ex_info, & full_insn_value); 526 if (rc != 0) 527 return rc; 528 length = CGEN_EXTRACT_FN (cd, insn) 529 (cd, insn, &ex_info, full_insn_value, &fields, pc); 530 } 531 else 532 length = CGEN_EXTRACT_FN (cd, insn) 533 (cd, insn, &ex_info, insn_value_cropped, &fields, pc); 534 535 /* Length < 0 -> error. */ 536 if (length < 0) 537 return length; 538 if (length > 0) 539 { 540 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length); 541 /* Length is in bits, result is in bytes. */ 542 return length / 8; 543 } 544 } 545 546 insn_list = CGEN_DIS_NEXT_INSN (insn_list); 547 } 548 549 return 0; 550 } 551 552 /* Default value for CGEN_PRINT_INSN. 553 The result is the size of the insn in bytes or zero for an unknown insn 554 or -1 if an error occured fetching bytes. */ 555 556 #ifndef CGEN_PRINT_INSN 557 #define CGEN_PRINT_INSN default_print_insn 558 #endif 559 560 static int 561 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info) 562 { 563 bfd_byte buf[CGEN_MAX_INSN_SIZE]; 564 int buflen; 565 int status; 566 567 /* Attempt to read the base part of the insn. */ 568 buflen = cd->base_insn_bitsize / 8; 569 status = (*info->read_memory_func) (pc, buf, buflen, info); 570 571 /* Try again with the minimum part, if min < base. */ 572 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize)) 573 { 574 buflen = cd->min_insn_bitsize / 8; 575 status = (*info->read_memory_func) (pc, buf, buflen, info); 576 } 577 578 if (status != 0) 579 { 580 (*info->memory_error_func) (status, pc, info); 581 return -1; 582 } 583 584 return print_insn (cd, pc, info, buf, buflen); 585 } 586 587 /* Main entry point. 588 Print one instruction from PC on INFO->STREAM. 589 Return the size of the instruction (in bytes). */ 590 591 typedef struct cpu_desc_list 592 { 593 struct cpu_desc_list *next; 594 CGEN_BITSET *isa; 595 int mach; 596 int endian; 597 CGEN_CPU_DESC cd; 598 } cpu_desc_list; 599 600 int 601 print_insn_ip2k (bfd_vma pc, disassemble_info *info) 602 { 603 static cpu_desc_list *cd_list = 0; 604 cpu_desc_list *cl = 0; 605 static CGEN_CPU_DESC cd = 0; 606 static CGEN_BITSET *prev_isa; 607 static int prev_mach; 608 static int prev_endian; 609 int length; 610 CGEN_BITSET *isa; 611 int mach; 612 int endian = (info->endian == BFD_ENDIAN_BIG 613 ? CGEN_ENDIAN_BIG 614 : CGEN_ENDIAN_LITTLE); 615 enum bfd_architecture arch; 616 617 /* ??? gdb will set mach but leave the architecture as "unknown" */ 618 #ifndef CGEN_BFD_ARCH 619 #define CGEN_BFD_ARCH bfd_arch_ip2k 620 #endif 621 arch = info->arch; 622 if (arch == bfd_arch_unknown) 623 arch = CGEN_BFD_ARCH; 624 625 /* There's no standard way to compute the machine or isa number 626 so we leave it to the target. */ 627 #ifdef CGEN_COMPUTE_MACH 628 mach = CGEN_COMPUTE_MACH (info); 629 #else 630 mach = info->mach; 631 #endif 632 633 #ifdef CGEN_COMPUTE_ISA 634 { 635 static CGEN_BITSET *permanent_isa; 636 637 if (!permanent_isa) 638 permanent_isa = cgen_bitset_create (MAX_ISAS); 639 isa = permanent_isa; 640 cgen_bitset_clear (isa); 641 cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info)); 642 } 643 #else 644 isa = info->insn_sets; 645 #endif 646 647 /* If we've switched cpu's, try to find a handle we've used before */ 648 if (cd 649 && (cgen_bitset_compare (isa, prev_isa) != 0 650 || mach != prev_mach 651 || endian != prev_endian)) 652 { 653 cd = 0; 654 for (cl = cd_list; cl; cl = cl->next) 655 { 656 if (cgen_bitset_compare (cl->isa, isa) == 0 && 657 cl->mach == mach && 658 cl->endian == endian) 659 { 660 cd = cl->cd; 661 prev_isa = cd->isas; 662 break; 663 } 664 } 665 } 666 667 /* If we haven't initialized yet, initialize the opcode table. */ 668 if (! cd) 669 { 670 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach); 671 const char *mach_name; 672 673 if (!arch_type) 674 abort (); 675 mach_name = arch_type->printable_name; 676 677 prev_isa = cgen_bitset_copy (isa); 678 prev_mach = mach; 679 prev_endian = endian; 680 cd = ip2k_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa, 681 CGEN_CPU_OPEN_BFDMACH, mach_name, 682 CGEN_CPU_OPEN_ENDIAN, prev_endian, 683 CGEN_CPU_OPEN_END); 684 if (!cd) 685 abort (); 686 687 /* Save this away for future reference. */ 688 cl = xmalloc (sizeof (struct cpu_desc_list)); 689 cl->cd = cd; 690 cl->isa = prev_isa; 691 cl->mach = mach; 692 cl->endian = endian; 693 cl->next = cd_list; 694 cd_list = cl; 695 696 ip2k_cgen_init_dis (cd); 697 } 698 699 /* We try to have as much common code as possible. 700 But at this point some targets need to take over. */ 701 /* ??? Some targets may need a hook elsewhere. Try to avoid this, 702 but if not possible try to move this hook elsewhere rather than 703 have two hooks. */ 704 length = CGEN_PRINT_INSN (cd, pc, info); 705 if (length > 0) 706 return length; 707 if (length < 0) 708 return -1; 709 710 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); 711 return cd->default_insn_bitsize / 8; 712 } 713
