opcodes/disassemble.c

   1 /* Select disassembly routine for specified architecture.
   2    Copyright (C) 1994-2019 Free Software Foundation, Inc.
   3
   4    This file is part of the GNU opcodes library.
   5
   6    This library is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  19    MA 02110-1301, USA.  */
  20
  21 #include "sysdep.h"
  22 #include "disassemble.h"
  23 #include "safe-ctype.h"
  24 #include <assert.h>
  25
  26 #ifdef ARCH_all
  27 #define ARCH_aarch64
  28 #define ARCH_alpha
  29 #define ARCH_arc
  30 #define ARCH_arm
  31 #define ARCH_avr
  32 #define ARCH_bfin
  33 #define ARCH_cr16
  34 #define ARCH_cris
  35 #define ARCH_crx
  36 #define ARCH_csky
  37 #define ARCH_d10v
  38 #define ARCH_d30v
  39 #define ARCH_dlx
  40 #define ARCH_bpf
  41 #define ARCH_epiphany
  42 #define ARCH_fr30
  43 #define ARCH_frv
  44 #define ARCH_ft32
  45 #define ARCH_h8300
  46 #define ARCH_hppa
  47 #define ARCH_i386
  48 #define ARCH_ia64
  49 #define ARCH_ip2k
  50 #define ARCH_iq2000
  51 #define ARCH_lm32
  52 #define ARCH_m32c
  53 #define ARCH_m32r
  54 #define ARCH_m68hc11
  55 #define ARCH_m68hc12
  56 #define ARCH_m68k
  57 #define ARCH_mcore
  58 #define ARCH_mep
  59 #define ARCH_metag
  60 #define ARCH_microblaze
  61 #define ARCH_mips
  62 #define ARCH_mmix
  63 #define ARCH_mn10200
  64 #define ARCH_mn10300
  65 #define ARCH_moxie
  66 #define ARCH_mt
  67 #define ARCH_msp430
  68 #define ARCH_nds32
  69 #define ARCH_nfp
  70 #define ARCH_nios2
  71 #define ARCH_ns32k
  72 #define ARCH_or1k
  73 #define ARCH_pdp11
  74 #define ARCH_pj
  75 #define ARCH_powerpc
  76 #define ARCH_pru
  77 #define ARCH_riscv
  78 #define ARCH_rs6000
  79 #define ARCH_rl78
  80 #define ARCH_rx
  81 #define ARCH_s12z
  82 #define ARCH_s390
  83 #define ARCH_score
  84 #define ARCH_sh
  85 #define ARCH_sparc
  86 #define ARCH_spu
  87 #define ARCH_tic30
  88 #define ARCH_tic4x
  89 #define ARCH_tic54x
  90 #define ARCH_tic6x
  91 #define ARCH_tilegx
  92 #define ARCH_tilepro
  93 #define ARCH_v850
  94 #define ARCH_vax
  95 #define ARCH_visium
  96 #define ARCH_wasm32
  97 #define ARCH_xstormy16
  98 #define ARCH_xc16x
  99 #define ARCH_xgate
 100 #define ARCH_xtensa
 101 #define ARCH_z80
 102 #define ARCH_z8k
 103 #endif
 104
 105 #ifdef ARCH_m32c
 106 #include "m32c-desc.h"
 107 #endif
 108
 109 #ifdef ARCH_bpf
 110 /* XXX this should be including bpf-desc.h instead of this hackery,
 111    but at the moment it is not possible to include several CGEN
 112    generated *-desc.h files simultaneously.  To be fixed in
 113    CGEN...  */
 114
 115 # ifdef ARCH_m32c
 116 enum epbf_isa_attr
 117 {
 118  ISA_EBPFLE, ISA_EBPFBE, ISA_EBPFMAX
 119 };
 120 # else
 121 #  include "bpf-desc.h"
 122 #  define ISA_EBPFMAX ISA_MAX
 123 # endif
 124 #endif /* ARCH_bpf */
 125
 126 disassembler_ftype
 127 disassembler (enum bfd_architecture a,
 128               bfd_boolean big ATTRIBUTE_UNUSED,
 129               unsigned long mach ATTRIBUTE_UNUSED,
 130               bfd *abfd ATTRIBUTE_UNUSED)
 131 {
 132   disassembler_ftype disassemble;
 133
 134   switch (a)
 135     {
 136       /* If you add a case to this table, also add it to the
 137          ARCH_all definition right above this function.  */
 138 #ifdef ARCH_aarch64
 139     case bfd_arch_aarch64:
 140       disassemble = print_insn_aarch64;
 141       break;
 142 #endif
 143 #ifdef ARCH_alpha
 144     case bfd_arch_alpha:
 145       disassemble = print_insn_alpha;
 146       break;
 147 #endif
 148 #ifdef ARCH_arc
 149     case bfd_arch_arc:
 150       disassemble = arc_get_disassembler (abfd);
 151       break;
 152 #endif
 153 #ifdef ARCH_arm
 154     case bfd_arch_arm:
 155       if (big)
 156         disassemble = print_insn_big_arm;
 157       else
 158         disassemble = print_insn_little_arm;
 159       break;
 160 #endif
 161 #ifdef ARCH_avr
 162     case bfd_arch_avr:
 163       disassemble = print_insn_avr;
 164       break;
 165 #endif
 166 #ifdef ARCH_bfin
 167     case bfd_arch_bfin:
 168       disassemble = print_insn_bfin;
 169       break;
 170 #endif
 171 #ifdef ARCH_cr16
 172     case bfd_arch_cr16:
 173       disassemble = print_insn_cr16;
 174       break;
 175 #endif
 176 #ifdef ARCH_cris
 177     case bfd_arch_cris:
 178       disassemble = cris_get_disassembler (abfd);
 179       break;
 180 #endif
 181 #ifdef ARCH_crx
 182     case bfd_arch_crx:
 183       disassemble = print_insn_crx;
 184       break;
 185 #endif
 186 #ifdef ARCH_csky
 187     case bfd_arch_csky:
 188       disassemble = csky_get_disassembler (abfd);
 189       break;
 190 #endif
 191
 192 #ifdef ARCH_d10v
 193     case bfd_arch_d10v:
 194       disassemble = print_insn_d10v;
 195       break;
 196 #endif
 197 #ifdef ARCH_d30v
 198     case bfd_arch_d30v:
 199       disassemble = print_insn_d30v;
 200       break;
 201 #endif
 202 #ifdef ARCH_dlx
 203     case bfd_arch_dlx:
 204       /* As far as I know we only handle big-endian DLX objects.  */
 205       disassemble = print_insn_dlx;
 206       break;
 207 #endif
 208 #ifdef ARCH_h8300
 209     case bfd_arch_h8300:
 210       if (mach == bfd_mach_h8300h || mach == bfd_mach_h8300hn)
 211         disassemble = print_insn_h8300h;
 212       else if (mach == bfd_mach_h8300s
 213                || mach == bfd_mach_h8300sn
 214                || mach == bfd_mach_h8300sx
 215                || mach == bfd_mach_h8300sxn)
 216         disassemble = print_insn_h8300s;
 217       else
 218         disassemble = print_insn_h8300;
 219       break;
 220 #endif
 221 #ifdef ARCH_hppa
 222     case bfd_arch_hppa:
 223       disassemble = print_insn_hppa;
 224       break;
 225 #endif
 226 #ifdef ARCH_i386
 227     case bfd_arch_i386:
 228     case bfd_arch_iamcu:
 229     case bfd_arch_l1om:
 230     case bfd_arch_k1om:
 231       disassemble = print_insn_i386;
 232       break;
 233 #endif
 234 #ifdef ARCH_ia64
 235     case bfd_arch_ia64:
 236       disassemble = print_insn_ia64;
 237       break;
 238 #endif
 239 #ifdef ARCH_ip2k
 240     case bfd_arch_ip2k:
 241       disassemble = print_insn_ip2k;
 242       break;
 243 #endif
 244 #ifdef ARCH_bpf
 245     case bfd_arch_bpf:
 246       disassemble = print_insn_bpf;
 247       break;
 248 #endif
 249 #ifdef ARCH_epiphany
 250     case bfd_arch_epiphany:
 251       disassemble = print_insn_epiphany;
 252       break;
 253 #endif
 254 #ifdef ARCH_fr30
 255     case bfd_arch_fr30:
 256       disassemble = print_insn_fr30;
 257       break;
 258 #endif
 259 #ifdef ARCH_lm32
 260     case bfd_arch_lm32:
 261       disassemble = print_insn_lm32;
 262       break;
 263 #endif
 264 #ifdef ARCH_m32r
 265     case bfd_arch_m32r:
 266       disassemble = print_insn_m32r;
 267       break;
 268 #endif
 269 #if defined(ARCH_m68hc11) || defined(ARCH_m68hc12) \
 270     || defined(ARCH_9s12x) || defined(ARCH_m9s12xg)
 271     case bfd_arch_m68hc11:
 272       disassemble = print_insn_m68hc11;
 273       break;
 274     case bfd_arch_m68hc12:
 275       disassemble = print_insn_m68hc12;
 276       break;
 277     case bfd_arch_m9s12x:
 278       disassemble = print_insn_m9s12x;
 279       break;
 280     case bfd_arch_m9s12xg:
 281       disassemble = print_insn_m9s12xg;
 282       break;
 283 #endif
 284 #if defined(ARCH_s12z)
 285     case bfd_arch_s12z:
 286       disassemble = print_insn_s12z;
 287       break;
 288 #endif
 289 #ifdef ARCH_m68k
 290     case bfd_arch_m68k:
 291       disassemble = print_insn_m68k;
 292       break;
 293 #endif
 294 #ifdef ARCH_mt
 295     case bfd_arch_mt:
 296       disassemble = print_insn_mt;
 297       break;
 298 #endif
 299 #ifdef ARCH_microblaze
 300     case bfd_arch_microblaze:
 301       disassemble = print_insn_microblaze;
 302       break;
 303 #endif
 304 #ifdef ARCH_msp430
 305     case bfd_arch_msp430:
 306       disassemble = print_insn_msp430;
 307       break;
 308 #endif
 309 #ifdef ARCH_nds32
 310     case bfd_arch_nds32:
 311       disassemble = print_insn_nds32;
 312       break;
 313 #endif
 314 #ifdef ARCH_nfp
 315     case bfd_arch_nfp:
 316       disassemble = print_insn_nfp;
 317       break;
 318 #endif
 319 #ifdef ARCH_ns32k
 320     case bfd_arch_ns32k:
 321       disassemble = print_insn_ns32k;
 322       break;
 323 #endif
 324 #ifdef ARCH_mcore
 325     case bfd_arch_mcore:
 326       disassemble = print_insn_mcore;
 327       break;
 328 #endif
 329 #ifdef ARCH_mep
 330     case bfd_arch_mep:
 331       disassemble = print_insn_mep;
 332       break;
 333 #endif
 334 #ifdef ARCH_metag
 335     case bfd_arch_metag:
 336       disassemble = print_insn_metag;
 337       break;
 338 #endif
 339 #ifdef ARCH_mips
 340     case bfd_arch_mips:
 341       if (big)
 342         disassemble = print_insn_big_mips;
 343       else
 344         disassemble = print_insn_little_mips;
 345       break;
 346 #endif
 347 #ifdef ARCH_mmix
 348     case bfd_arch_mmix:
 349       disassemble = print_insn_mmix;
 350       break;
 351 #endif
 352 #ifdef ARCH_mn10200
 353     case bfd_arch_mn10200:
 354       disassemble = print_insn_mn10200;
 355       break;
 356 #endif
 357 #ifdef ARCH_mn10300
 358     case bfd_arch_mn10300:
 359       disassemble = print_insn_mn10300;
 360       break;
 361 #endif
 362 #ifdef ARCH_nios2
 363     case bfd_arch_nios2:
 364       if (big)
 365         disassemble = print_insn_big_nios2;
 366       else
 367         disassemble = print_insn_little_nios2;
 368       break;
 369 #endif
 370 #ifdef ARCH_or1k
 371     case bfd_arch_or1k:
 372       disassemble = print_insn_or1k;
 373       break;
 374 #endif
 375 #ifdef ARCH_pdp11
 376     case bfd_arch_pdp11:
 377       disassemble = print_insn_pdp11;
 378       break;
 379 #endif
 380 #ifdef ARCH_pj
 381     case bfd_arch_pj:
 382       disassemble = print_insn_pj;
 383       break;
 384 #endif
 385 #ifdef ARCH_powerpc
 386     case bfd_arch_powerpc:
 387 #endif
 388 #ifdef ARCH_rs6000
 389     case bfd_arch_rs6000:
 390 #endif
 391 #if defined ARCH_powerpc || defined ARCH_rs6000
 392       if (big)
 393         disassemble = print_insn_big_powerpc;
 394       else
 395         disassemble = print_insn_little_powerpc;
 396       break;
 397 #endif
 398 #ifdef ARCH_pru
 399     case bfd_arch_pru:
 400       disassemble = print_insn_pru;
 401       break;
 402 #endif
 403 #ifdef ARCH_riscv
 404     case bfd_arch_riscv:
 405       disassemble = print_insn_riscv;
 406       break;
 407 #endif
 408 #ifdef ARCH_rl78
 409     case bfd_arch_rl78:
 410       disassemble = rl78_get_disassembler (abfd);
 411       break;
 412 #endif
 413 #ifdef ARCH_rx
 414     case bfd_arch_rx:
 415       disassemble = print_insn_rx;
 416       break;
 417 #endif
 418 #ifdef ARCH_s390
 419     case bfd_arch_s390:
 420       disassemble = print_insn_s390;
 421       break;
 422 #endif
 423 #ifdef ARCH_score
 424     case bfd_arch_score:
 425       if (big)
 426         disassemble = print_insn_big_score;
 427       else
 428         disassemble = print_insn_little_score;
 429      break;
 430 #endif
 431 #ifdef ARCH_sh
 432     case bfd_arch_sh:
 433       disassemble = print_insn_sh;
 434       break;
 435 #endif
 436 #ifdef ARCH_sparc
 437     case bfd_arch_sparc:
 438       disassemble = print_insn_sparc;
 439       break;
 440 #endif
 441 #ifdef ARCH_spu
 442     case bfd_arch_spu:
 443       disassemble = print_insn_spu;
 444       break;
 445 #endif
 446 #ifdef ARCH_tic30
 447     case bfd_arch_tic30:
 448       disassemble = print_insn_tic30;
 449       break;
 450 #endif
 451 #ifdef ARCH_tic4x
 452     case bfd_arch_tic4x:
 453       disassemble = print_insn_tic4x;
 454       break;
 455 #endif
 456 #ifdef ARCH_tic54x
 457     case bfd_arch_tic54x:
 458       disassemble = print_insn_tic54x;
 459       break;
 460 #endif
 461 #ifdef ARCH_tic6x
 462     case bfd_arch_tic6x:
 463       disassemble = print_insn_tic6x;
 464       break;
 465 #endif
 466 #ifdef ARCH_ft32
 467     case bfd_arch_ft32:
 468       disassemble = print_insn_ft32;
 469       break;
 470 #endif
 471 #ifdef ARCH_v850
 472     case bfd_arch_v850:
 473     case bfd_arch_v850_rh850:
 474       disassemble = print_insn_v850;
 475       break;
 476 #endif
 477 #ifdef ARCH_wasm32
 478     case bfd_arch_wasm32:
 479       disassemble = print_insn_wasm32;
 480       break;
 481 #endif
 482 #ifdef ARCH_xgate
 483     case bfd_arch_xgate:
 484       disassemble = print_insn_xgate;
 485       break;
 486 #endif
 487 #ifdef ARCH_xstormy16
 488     case bfd_arch_xstormy16:
 489       disassemble = print_insn_xstormy16;
 490       break;
 491 #endif
 492 #ifdef ARCH_xc16x
 493     case bfd_arch_xc16x:
 494       disassemble = print_insn_xc16x;
 495       break;
 496 #endif
 497 #ifdef ARCH_xtensa
 498     case bfd_arch_xtensa:
 499       disassemble = print_insn_xtensa;
 500       break;
 501 #endif
 502 #ifdef ARCH_z80
 503     case bfd_arch_z80:
 504       disassemble = print_insn_z80;
 505       break;
 506 #endif
 507 #ifdef ARCH_z8k
 508     case bfd_arch_z8k:
 509       if (mach == bfd_mach_z8001)
 510         disassemble = print_insn_z8001;
 511       else
 512         disassemble = print_insn_z8002;
 513       break;
 514 #endif
 515 #ifdef ARCH_vax
 516     case bfd_arch_vax:
 517       disassemble = print_insn_vax;
 518       break;
 519 #endif
 520 #ifdef ARCH_visium
 521      case bfd_arch_visium:
 522        disassemble = print_insn_visium;
 523        break;
 524 #endif
 525 #ifdef ARCH_frv
 526     case bfd_arch_frv:
 527       disassemble = print_insn_frv;
 528       break;
 529 #endif
 530 #ifdef ARCH_moxie
 531     case bfd_arch_moxie:
 532       disassemble = print_insn_moxie;
 533       break;
 534 #endif
 535 #ifdef ARCH_iq2000
 536     case bfd_arch_iq2000:
 537       disassemble = print_insn_iq2000;
 538       break;
 539 #endif
 540 #ifdef ARCH_m32c
 541     case bfd_arch_m32c:
 542       disassemble = print_insn_m32c;
 543       break;
 544 #endif
 545 #ifdef ARCH_tilegx
 546     case bfd_arch_tilegx:
 547       disassemble = print_insn_tilegx;
 548       break;
 549 #endif
 550 #ifdef ARCH_tilepro
 551     case bfd_arch_tilepro:
 552       disassemble = print_insn_tilepro;
 553       break;
 554 #endif
 555     default:
 556       return 0;
 557     }
 558   return disassemble;
 559 }
 560
 561 void
 562 disassembler_usage (FILE *stream ATTRIBUTE_UNUSED)
 563 {
 564 #ifdef ARCH_aarch64
 565   print_aarch64_disassembler_options (stream);
 566 #endif
 567 #ifdef ARCH_arc
 568   print_arc_disassembler_options (stream);
 569 #endif
 570 #ifdef ARCH_arm
 571   print_arm_disassembler_options (stream);
 572 #endif
 573 #ifdef ARCH_mips
 574   print_mips_disassembler_options (stream);
 575 #endif
 576 #ifdef ARCH_nfp
 577   print_nfp_disassembler_options (stream);
 578 #endif
 579 #ifdef ARCH_powerpc
 580   print_ppc_disassembler_options (stream);
 581 #endif
 582 #ifdef ARCH_riscv
 583   print_riscv_disassembler_options (stream);
 584 #endif
 585 #ifdef ARCH_i386
 586   print_i386_disassembler_options (stream);
 587 #endif
 588 #ifdef ARCH_s390
 589   print_s390_disassembler_options (stream);
 590 #endif
 591 #ifdef ARCH_wasm32
 592   print_wasm32_disassembler_options (stream);
 593 #endif
 594
 595   return;
 596 }
 597
 598 void
 599 disassemble_init_for_target (struct disassemble_info * info)
 600 {
 601   if (info == NULL)
 602     return;
 603
 604   switch (info->arch)
 605     {
 606 #ifdef ARCH_aarch64
 607     case bfd_arch_aarch64:
 608       info->symbol_is_valid = aarch64_symbol_is_valid;
 609       info->disassembler_needs_relocs = TRUE;
 610       break;
 611 #endif
 612 #ifdef ARCH_arm
 613     case bfd_arch_arm:
 614       info->symbol_is_valid = arm_symbol_is_valid;
 615       info->disassembler_needs_relocs = TRUE;
 616       break;
 617 #endif
 618 #ifdef ARCH_csky
 619     case bfd_arch_csky:
 620       info->symbol_is_valid = csky_symbol_is_valid;
 621       info->disassembler_needs_relocs = TRUE;
 622       break;
 623 #endif
 624
 625 #ifdef ARCH_ia64
 626     case bfd_arch_ia64:
 627       info->skip_zeroes = 16;
 628       break;
 629 #endif
 630 #ifdef ARCH_tic4x
 631     case bfd_arch_tic4x:
 632       info->skip_zeroes = 32;
 633       break;
 634 #endif
 635 #ifdef ARCH_mep
 636     case bfd_arch_mep:
 637       info->skip_zeroes = 256;
 638       info->skip_zeroes_at_end = 0;
 639       break;
 640 #endif
 641 #ifdef ARCH_metag
 642     case bfd_arch_metag:
 643       info->disassembler_needs_relocs = TRUE;
 644       break;
 645 #endif
 646 #ifdef ARCH_m32c
 647     case bfd_arch_m32c:
 648       /* This processor in fact is little endian.  The value set here
 649          reflects the way opcodes are written in the cgen description.  */
 650       info->endian = BFD_ENDIAN_BIG;
 651       if (!info->private_data)
 652         {
 653           info->private_data = cgen_bitset_create (ISA_MAX);
 654           if (info->mach == bfd_mach_m16c)
 655             cgen_bitset_set (info->private_data, ISA_M16C);
 656           else
 657             cgen_bitset_set (info->private_data, ISA_M32C);
 658         }
 659       break;
 660 #endif
 661 #ifdef ARCH_bpf
 662     case bfd_arch_bpf:
 663       if (!info->private_data)
 664         {
 665           info->private_data = cgen_bitset_create (ISA_EBPFMAX);
 666           if (info->endian == BFD_ENDIAN_BIG)
 667             cgen_bitset_set (info->private_data, ISA_EBPFBE);
 668           else
 669             cgen_bitset_set (info->private_data, ISA_EBPFLE);
 670         }
 671       break;
 672 #endif
 673 #ifdef ARCH_pru
 674     case bfd_arch_pru:
 675       info->disassembler_needs_relocs = TRUE;
 676       break;
 677 #endif
 678 #ifdef ARCH_powerpc
 679     case bfd_arch_powerpc:
 680 #endif
 681 #ifdef ARCH_rs6000
 682     case bfd_arch_rs6000:
 683 #endif
 684 #if defined (ARCH_powerpc) || defined (ARCH_rs6000)
 685       disassemble_init_powerpc (info);
 686       break;
 687 #endif
 688 #ifdef ARCH_riscv
 689     case bfd_arch_riscv:
 690       info->symbol_is_valid = riscv_symbol_is_valid;
 691       break;
 692 #endif
 693 #ifdef ARCH_wasm32
 694     case bfd_arch_wasm32:
 695       disassemble_init_wasm32 (info);
 696       break;
 697 #endif
 698 #ifdef ARCH_s390
 699     case bfd_arch_s390:
 700       disassemble_init_s390 (info);
 701       break;
 702 #endif
 703 #ifdef ARCH_nds32
 704     case bfd_arch_nds32:
 705       disassemble_init_nds32 (info);
 706       break;
 707  #endif
 708     default:
 709       break;
 710     }
 711 }
 712
 713 void
 714 disassemble_free_target (struct disassemble_info *info)
 715 {
 716   if (info == NULL)
 717     return;
 718
 719   switch (info->arch)
 720     {
 721     default:
 722       return;
 723
 724 #ifdef ARCH_bpf
 725     case bfd_arch_bpf:
 726 #endif
 727 #ifdef ARCH_m32c
 728     case bfd_arch_m32c:
 729 #endif
 730 #if defined ARCH_bpf || defined ARCH_m32c
 731       if (info->private_data)
 732         {
 733           CGEN_BITSET *mask = info->private_data;
 734           free (mask->bits);
 735         }
 736       break;
 737 #endif
 738
 739 #ifdef ARCH_arc
 740     case bfd_arch_arc:
 741       break;
 742 #endif
 743 #ifdef ARCH_cris
 744     case bfd_arch_cris:
 745       break;
 746 #endif
 747 #ifdef ARCH_mmix
 748     case bfd_arch_mmix:
 749       break;
 750 #endif
 751 #ifdef ARCH_nfp
 752     case bfd_arch_nfp:
 753       break;
 754 #endif
 755 #ifdef ARCH_powerpc
 756     case bfd_arch_powerpc:
 757       break;
 758 #endif
 759 #ifdef ARCH_riscv
 760     case bfd_arch_riscv:
 761       break;
 762 #endif
 763 #ifdef ARCH_rs6000
 764     case bfd_arch_rs6000:
 765       break;
 766 #endif
 767     }
 768
 769   free (info->private_data);
 770 }
 771
 772 /* Remove whitespace and consecutive commas from OPTIONS.  */
 773
 774 char *
 775 remove_whitespace_and_extra_commas (char *options)
 776 {
 777   char *str;
 778   size_t i, len;
 779
 780   if (options == NULL)
 781     return NULL;
 782
 783   /* Strip off all trailing whitespace and commas.  */
 784   for (len = strlen (options); len > 0; len--)
 785     {
 786       if (!ISSPACE (options[len - 1]) && options[len - 1] != ',')
 787         break;
 788       options[len - 1] = '\0';
 789     }
 790
 791   /* Convert all remaining whitespace to commas.  */
 792   for (i = 0; options[i] != '\0'; i++)
 793     if (ISSPACE (options[i]))
 794       options[i] = ',';
 795
 796   /* Remove consecutive commas.  */
 797   for (str = options; *str != '\0'; str++)
 798     if (*str == ',' && (*(str + 1) == ',' || str == options))
 799       {
 800         char *next = str + 1;
 801         while (*next == ',')
 802           next++;
 803         len = strlen (next);
 804         if (str != options)
 805           str++;
 806         memmove (str, next, len);
 807         next[len - (size_t)(next - str)] = '\0';
 808       }
 809   return (strlen (options) != 0) ? options : NULL;
 810 }
 811
 812 /* Like STRCMP, but treat ',' the same as '\0' so that we match
 813    strings like "foobar" against "foobar,xxyyzz,...".  */
 814
 815 int
 816 disassembler_options_cmp (const char *s1, const char *s2)
 817 {
 818   unsigned char c1, c2;
 819
 820   do
 821     {
 822       c1 = (unsigned char) *s1++;
 823       if (c1 == ',')
 824         c1 = '\0';
 825       c2 = (unsigned char) *s2++;
 826       if (c2 == ',')
 827         c2 = '\0';
 828       if (c1 == '\0')
 829         return c1 - c2;
 830     }
 831   while (c1 == c2);
 832
 833   return c1 - c2;
 834 }