disassembler/main.c

   1 /*
   2  *   Copyright (C) 2006-2010  Michael Buesch <mb@bu3sch.de>
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License version 2
   6  *   as published by the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  */
  13
  14 #include "main.h"
  15 #include "list.h"
  16 #include "util.h"
  17 #include "args.h"
  18
  19 #include <stdio.h>
  20 #include <stdint.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24
  25 struct bin_instruction {
  26         unsigned int opcode;
  27         unsigned int operands[3];
  28 };
  29
  30 struct statement {
  31         enum {
  32                 STMT_INSN,
  33                 STMT_LABEL,
  34         } type;
  35
  36         union {
  37                 struct {
  38                         struct bin_instruction *bin;
  39                         const char *name;
  40                         const char *operands[5];
  41
  42                         int is_labelref;
  43                         unsigned int labeladdr;
  44                         struct statement *labelref;
  45                 } insn;
  46                 struct {
  47                         char *name;
  48                 } label;
  49         } u;
  50
  51         struct list_head list;
  52 };
  53
  54 struct disassembler_context {
  55         /* The architecture of the input file. */
  56         unsigned int arch;
  57
  58         struct bin_instruction *code;
  59         size_t nr_insns;
  60
  61         struct list_head stmt_list;
  62 };
  63
  64
  65 FILE *infile;
  66 FILE *outfile;
  67 const char *infile_name;
  68 const char *outfile_name;
  69
  70
  71 #define _msg_helper(type, msg, x...)    do {            \
  72         fprintf(stderr, "Disassembler " type            \
  73                 ":\n  " msg "\n" ,##x);                 \
  74                                         } while (0)
  75
  76 #define dasm_error(msg, x...)   do {            \
  77         _msg_helper("ERROR", msg ,##x);         \
  78         exit(1);                                \
  79                                 } while (0)
  80
  81 #define dasm_int_error(msg, x...) \
  82         dasm_error("Internal error (bug): " msg ,##x)
  83
  84 #define dasm_warn(msg, x...)    \
  85         _msg_helper("warning", msg ,##x)
  86
  87 #define asm_info(msg, x...)     \
  88         _msg_helper("info", msg ,##x)
  89
  90 static const char * gen_raw_code(unsigned int operand)
  91 {
  92         char *ret;
  93
  94         ret = xmalloc(6);
  95         snprintf(ret, 6, "@%X", operand);
  96
  97         return ret;
  98 }
  99
 100 static const char * disasm_mem_operand(unsigned int operand)
 101 {
 102         char *ret;
 103
 104         ret = xmalloc(9);
 105         snprintf(ret, 9, "[0x%X]", operand);
 106
 107         return ret;
 108 }
 109
 110 static const char * disasm_indirect_mem_operand(unsigned int operand)
 111 {
 112         char *ret;
 113         unsigned int offset, reg;
 114
 115         switch (cmdargs.arch) {
 116         case 5:
 117                 offset = (operand & 0x3F);
 118                 reg = ((operand >> 6) & 0x7);
 119                 break;
 120         case 15:
 121                 offset = (operand & 0x7F);
 122                 reg = ((operand >> 7) & 0x7);
 123                 break;
 124         default:
 125                 dasm_int_error("disasm_indirect_mem_operand invalid arch");
 126         }
 127         ret = xmalloc(12);
 128         snprintf(ret, 12, "[0x%02X,off%u]", offset, reg);
 129
 130         return ret;
 131 }
 132
 133 static const char * disasm_imm_operand(unsigned int operand)
 134 {
 135         char *ret;
 136         unsigned int signmask;
 137         unsigned int mask;
 138
 139         switch (cmdargs.arch) {
 140         case 5:
 141                 signmask = (1 << 9);
 142                 mask = 0x3FF;
 143                 break;
 144         case 15:
 145                 signmask = (1 << 10);
 146                 mask = 0x7FF;
 147                 break;
 148         default:
 149                 dasm_int_error("disasm_imm_operand invalid arch");
 150         }
 151
 152         operand &= mask;
 153
 154         ret = xmalloc(7);
 155         if (operand & signmask)
 156                 operand = (operand | (~mask & 0xFFFF));
 157         snprintf(ret, 7, "0x%X", operand);
 158
 159         return ret;
 160 }
 161
 162 static const char * disasm_spr_operand(unsigned int operand)
 163 {
 164         char *ret;
 165         unsigned int mask;
 166
 167         switch (cmdargs.arch) {
 168         case 5:
 169                 mask = 0x1FF;
 170                 break;
 171         case 15:
 172                 mask = 0x7FF;
 173                 break;
 174         default:
 175                 dasm_int_error("disasm_spr_operand invalid arch");
 176         }
 177
 178         ret = xmalloc(8);
 179         snprintf(ret, 8, "spr%X", (operand & mask));
 180
 181         return ret;
 182 }
 183
 184 static const char * disasm_gpr_operand(unsigned int operand)
 185 {
 186         char *ret;
 187         unsigned int mask;
 188
 189         switch (cmdargs.arch) {
 190         case 5:
 191                 mask = 0x3F;
 192                 break;
 193         case 15:
 194                 mask = 0x7F;
 195                 break;
 196         default:
 197                 dasm_int_error("disasm_gpr_operand invalid arch");
 198         }
 199
 200         ret = xmalloc(5);
 201         snprintf(ret, 5, "r%u", (operand & mask));
 202
 203         return ret;
 204 }
 205
 206 static void disasm_raw_operand(struct statement *stmt,
 207                                int oper_idx,
 208                                int out_idx)
 209 {
 210         unsigned int operand = stmt->u.insn.bin->operands[oper_idx];
 211
 212         stmt->u.insn.operands[out_idx] = gen_raw_code(operand);
 213 }
 214
 215 static void disasm_std_operand(struct statement *stmt,
 216                                int oper_idx,
 217                                int out_idx)
 218 {
 219         unsigned int operand = stmt->u.insn.bin->operands[oper_idx];
 220
 221         switch (cmdargs.arch) {
 222         case 5:
 223                 if (!(operand & 0x800)) {
 224                         stmt->u.insn.operands[out_idx] = disasm_mem_operand(operand);
 225                         return;
 226                 } else if ((operand & 0xC00) == 0xC00) {
 227                         stmt->u.insn.operands[out_idx] = disasm_imm_operand(operand);
 228                         return;
 229                 } else if ((operand & 0xFC0) == 0xBC0) {
 230                         stmt->u.insn.operands[out_idx] = disasm_gpr_operand(operand);
 231                         return;
 232                 } else if ((operand & 0xE00) == 0x800) {
 233                         stmt->u.insn.operands[out_idx] = disasm_spr_operand(operand);
 234                         return;
 235                 } else if ((operand & 0xE00) == 0xA00) {
 236                         stmt->u.insn.operands[out_idx] = disasm_indirect_mem_operand(operand);
 237                         return;
 238                 }
 239                 break;
 240         case 15:
 241                 if (!(operand & 0x1000)) {
 242                         stmt->u.insn.operands[out_idx] = disasm_mem_operand(operand);
 243                         return;
 244                 } else if ((operand & 0x1800) == 0x1800) {
 245                         stmt->u.insn.operands[out_idx] = disasm_imm_operand(operand);
 246                         return;
 247                 } else if ((operand & 0x1F80) == 0x1780) {
 248                         stmt->u.insn.operands[out_idx] = disasm_gpr_operand(operand);
 249                         return;
 250                 } else if ((operand & 0x1C00) == 0x1000) {
 251                         stmt->u.insn.operands[out_idx] = disasm_spr_operand(operand);
 252                         return;
 253                 } else if ((operand & 0x1C00) == 0x1400) {
 254                         stmt->u.insn.operands[out_idx] = disasm_indirect_mem_operand(operand);
 255                         return;
 256                 }
 257                 break;
 258         default:
 259                 dasm_int_error("disasm_std_operand invalid arch");
 260         }
 261         /* No luck. Disassemble to raw operand. */
 262         disasm_raw_operand(stmt, oper_idx, out_idx);
 263 }
 264
 265 static void disasm_opcode_raw(struct disassembler_context *ctx,
 266                               struct statement *stmt,
 267                               int raw_operands)
 268 {
 269         stmt->u.insn.name = gen_raw_code(stmt->u.insn.bin->opcode);
 270         if (raw_operands) {
 271                 disasm_raw_operand(stmt, 0, 0);
 272                 disasm_raw_operand(stmt, 1, 1);
 273                 disasm_raw_operand(stmt, 2, 2);
 274         } else {
 275                 disasm_std_operand(stmt, 0, 0);
 276                 disasm_std_operand(stmt, 1, 1);
 277                 disasm_std_operand(stmt, 2, 2);
 278         }
 279 }
 280
 281 static void disasm_constant_opcodes(struct disassembler_context *ctx,
 282                                     struct statement *stmt)
 283 {
 284         struct bin_instruction *bin = stmt->u.insn.bin;
 285
 286         switch (bin->opcode) {
 287         case 0x1C0:
 288                 stmt->u.insn.name = "add";
 289                 disasm_std_operand(stmt, 0, 0);
 290                 disasm_std_operand(stmt, 1, 1);
 291                 disasm_std_operand(stmt, 2, 2);
 292                 break;
 293         case 0x1C2:
 294                 stmt->u.insn.name = "add.";
 295                 disasm_std_operand(stmt, 0, 0);
 296                 disasm_std_operand(stmt, 1, 1);
 297                 disasm_std_operand(stmt, 2, 2);
 298                 break;
 299         case 0x1C1:
 300                 stmt->u.insn.name = "addc";
 301                 disasm_std_operand(stmt, 0, 0);
 302                 disasm_std_operand(stmt, 1, 1);
 303                 disasm_std_operand(stmt, 2, 2);
 304                 break;
 305         case 0x1C3:
 306                 stmt->u.insn.name = "addc.";
 307                 disasm_std_operand(stmt, 0, 0);
 308                 disasm_std_operand(stmt, 1, 1);
 309                 disasm_std_operand(stmt, 2, 2);
 310                 break;
 311         case 0x1D0:
 312                 stmt->u.insn.name = "sub";
 313                 disasm_std_operand(stmt, 0, 0);
 314                 disasm_std_operand(stmt, 1, 1);
 315                 disasm_std_operand(stmt, 2, 2);
 316                 break;
 317         case 0x1D2:
 318                 stmt->u.insn.name = "sub.";
 319                 disasm_std_operand(stmt, 0, 0);
 320                 disasm_std_operand(stmt, 1, 1);
 321                 disasm_std_operand(stmt, 2, 2);
 322                 break;
 323         case 0x1D1:
 324                 stmt->u.insn.name = "subc";
 325                 disasm_std_operand(stmt, 0, 0);
 326                 disasm_std_operand(stmt, 1, 1);
 327                 disasm_std_operand(stmt, 2, 2);
 328                 break;
 329         case 0x1D3:
 330                 stmt->u.insn.name = "subc.";
 331                 disasm_std_operand(stmt, 0, 0);
 332                 disasm_std_operand(stmt, 1, 1);
 333                 disasm_std_operand(stmt, 2, 2);
 334                 break;
 335         case 0x130:
 336                 stmt->u.insn.name = "sra";
 337                 disasm_std_operand(stmt, 0, 0);
 338                 disasm_std_operand(stmt, 1, 1);
 339                 disasm_std_operand(stmt, 2, 2);
 340                 break;
 341         case 0x160:
 342                 stmt->u.insn.name = "or";
 343                 disasm_std_operand(stmt, 0, 0);
 344                 disasm_std_operand(stmt, 1, 1);
 345                 disasm_std_operand(stmt, 2, 2);
 346                 break;
 347         case 0x140:
 348                 stmt->u.insn.name = "and";
 349                 disasm_std_operand(stmt, 0, 0);
 350                 disasm_std_operand(stmt, 1, 1);
 351                 disasm_std_operand(stmt, 2, 2);
 352                 break;
 353         case 0x170:
 354                 stmt->u.insn.name = "xor";
 355                 disasm_std_operand(stmt, 0, 0);
 356                 disasm_std_operand(stmt, 1, 1);
 357                 disasm_std_operand(stmt, 2, 2);
 358                 break;
 359         case 0x120:
 360                 stmt->u.insn.name = "sr";
 361                 disasm_std_operand(stmt, 0, 0);
 362                 disasm_std_operand(stmt, 1, 1);
 363                 disasm_std_operand(stmt, 2, 2);
 364                 break;
 365         case 0x110:
 366                 stmt->u.insn.name = "sl";
 367                 disasm_std_operand(stmt, 0, 0);
 368                 disasm_std_operand(stmt, 1, 1);
 369                 disasm_std_operand(stmt, 2, 2);
 370                 break;
 371         case 0x1A0:
 372                 stmt->u.insn.name = "rl";
 373                 disasm_std_operand(stmt, 0, 0);
 374                 disasm_std_operand(stmt, 1, 1);
 375                 disasm_std_operand(stmt, 2, 2);
 376                 break;
 377         case 0x1B0:
 378                 stmt->u.insn.name = "rr";
 379                 disasm_std_operand(stmt, 0, 0);
 380                 disasm_std_operand(stmt, 1, 1);
 381                 disasm_std_operand(stmt, 2, 2);
 382                 break;
 383         case 0x150:
 384                 stmt->u.insn.name = "nand";
 385                 disasm_std_operand(stmt, 0, 0);
 386                 disasm_std_operand(stmt, 1, 1);
 387                 disasm_std_operand(stmt, 2, 2);
 388                 break;
 389         case 0x040:
 390                 stmt->u.insn.name = "jand";
 391                 stmt->u.insn.is_labelref = 2;
 392                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 393                 disasm_std_operand(stmt, 0, 0);
 394                 disasm_std_operand(stmt, 1, 1);
 395                 break;
 396         case (0x040 | 0x1):
 397                 stmt->u.insn.name = "jnand";
 398                 stmt->u.insn.is_labelref = 2;
 399                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 400                 disasm_std_operand(stmt, 0, 0);
 401                 disasm_std_operand(stmt, 1, 1);
 402                 break;
 403         case 0x050:
 404                 stmt->u.insn.name = "js";
 405                 stmt->u.insn.is_labelref = 2;
 406                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 407                 disasm_std_operand(stmt, 0, 0);
 408                 disasm_std_operand(stmt, 1, 1);
 409                 break;
 410         case (0x050 | 0x1):
 411                 stmt->u.insn.name = "jns";
 412                 stmt->u.insn.is_labelref = 2;
 413                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 414                 disasm_std_operand(stmt, 0, 0);
 415                 disasm_std_operand(stmt, 1, 1);
 416                 break;
 417         case 0x0D0:
 418                 stmt->u.insn.name = "je";
 419                 stmt->u.insn.is_labelref = 2;
 420                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 421                 disasm_std_operand(stmt, 0, 0);
 422                 disasm_std_operand(stmt, 1, 1);
 423                 break;
 424         case (0x0D0 | 0x1):
 425                 stmt->u.insn.name = "jne";
 426                 stmt->u.insn.is_labelref = 2;
 427                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 428                 disasm_std_operand(stmt, 0, 0);
 429                 disasm_std_operand(stmt, 1, 1);
 430                 break;
 431         case 0x0D2:
 432                 stmt->u.insn.name = "jls";
 433                 stmt->u.insn.is_labelref = 2;
 434                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 435                 disasm_std_operand(stmt, 0, 0);
 436                 disasm_std_operand(stmt, 1, 1);
 437                 break;
 438         case (0x0D2 | 0x1):
 439                 stmt->u.insn.name = "jges";
 440                 stmt->u.insn.is_labelref = 2;
 441                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 442                 disasm_std_operand(stmt, 0, 0);
 443                 disasm_std_operand(stmt, 1, 1);
 444                 break;
 445         case 0x0D4:
 446                 stmt->u.insn.name = "jgs";
 447                 stmt->u.insn.is_labelref = 2;
 448                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 449                 disasm_std_operand(stmt, 0, 0);
 450                 disasm_std_operand(stmt, 1, 1);
 451                 break;
 452         case (0x0D4 | 0x1):
 453                 stmt->u.insn.name = "jles";
 454                 stmt->u.insn.is_labelref = 2;
 455                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 456                 disasm_std_operand(stmt, 0, 0);
 457                 disasm_std_operand(stmt, 1, 1);
 458                 break;
 459         case 0x0DA:
 460                 stmt->u.insn.name = "jl";
 461                 stmt->u.insn.is_labelref = 2;
 462                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 463                 disasm_std_operand(stmt, 0, 0);
 464                 disasm_std_operand(stmt, 1, 1);
 465                 break;
 466         case (0x0DA | 0x1):
 467                 stmt->u.insn.name = "jge";
 468                 stmt->u.insn.is_labelref = 2;
 469                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 470                 disasm_std_operand(stmt, 0, 0);
 471                 disasm_std_operand(stmt, 1, 1);
 472                 break;
 473         case 0x0DC:
 474                 stmt->u.insn.name = "jg";
 475                 stmt->u.insn.is_labelref = 2;
 476                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 477                 disasm_std_operand(stmt, 0, 0);
 478                 disasm_std_operand(stmt, 1, 1);
 479                 break;
 480         case (0x0DC | 0x1):
 481                 stmt->u.insn.name = "jle";
 482                 stmt->u.insn.is_labelref = 2;
 483                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 484                 disasm_std_operand(stmt, 0, 0);
 485                 disasm_std_operand(stmt, 1, 1);
 486                 break;
 487         case 0x002: {
 488                 char *str;
 489
 490                 switch (cmdargs.arch) {
 491                 case 5:
 492                         stmt->u.insn.name = "call";
 493                         stmt->u.insn.is_labelref = 1;
 494                         stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 495                         str = xmalloc(4);
 496                         snprintf(str, 4, "lr%u", stmt->u.insn.bin->operands[0]);
 497                         stmt->u.insn.operands[0] = str;
 498                         break;
 499                 case 15:
 500                         //FIXME: This opcode is different on r15. Decode raw for now.
 501                         disasm_opcode_raw(ctx, stmt, 1);
 502                         break;
 503                 }
 504                 break;
 505         }
 506         case 0x003: {
 507                 char *str;
 508
 509                 stmt->u.insn.name = "ret";
 510                 str = xmalloc(4);
 511                 snprintf(str, 4, "lr%u", stmt->u.insn.bin->operands[0]);
 512                 stmt->u.insn.operands[0] = str;
 513                 str = xmalloc(4);
 514                 snprintf(str, 4, "lr%u", stmt->u.insn.bin->operands[2]);
 515                 stmt->u.insn.operands[2] = str;
 516                 break;
 517         }
 518         case 0x004: {
 519                 if (cmdargs.arch != 15) {
 520                         dasm_error("arch 15 'calls' instruction found in arch %d binary",
 521                                    cmdargs.arch);
 522                 }
 523                 stmt->u.insn.name = "calls";
 524                 stmt->u.insn.is_labelref = 0;
 525                 stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 526                 if (stmt->u.insn.bin->operands[0] != 0x1780 ||
 527                     stmt->u.insn.bin->operands[1] != 0x1780)
 528                         dasm_warn("r15 calls: Invalid first or second argument");
 529                 break;
 530         }
 531         case 0x005: {
 532                 if (cmdargs.arch != 15) {
 533                         dasm_error("arch 15 'rets' instruction found in arch %d binary",
 534                                    cmdargs.arch);
 535                 }
 536                 stmt->u.insn.name = "rets";
 537                 if (stmt->u.insn.bin->operands[0] != 0x1780 ||
 538                     stmt->u.insn.bin->operands[1] != 0x1780 ||
 539                     stmt->u.insn.bin->operands[2] != 0)
 540                         dasm_warn("r15 rets: Invalid argument(s)");
 541                 break;
 542         }
 543         case 0x1E0: {
 544                 unsigned int flags, mask;
 545
 546                 switch (cmdargs.arch) {
 547                 case 5:
 548                         mask = 0x3FF;
 549                         break;
 550                 case 15:
 551                         mask = 0x7FF;
 552                         break;
 553                 default:
 554                         dasm_int_error("TKIP invalid arch");
 555                 }
 556
 557                 flags = stmt->u.insn.bin->operands[1];
 558                 switch (flags & mask) {
 559                 case 0x1:
 560                         stmt->u.insn.name = "tkiph";
 561                         break;
 562                 case (0x1 | 0x2):
 563                         stmt->u.insn.name = "tkiphs";
 564                         break;
 565                 case 0x0:
 566                         stmt->u.insn.name = "tkipl";
 567                         break;
 568                 case (0x0 | 0x2):
 569                         stmt->u.insn.name = "tkipls";
 570                         break;
 571                 default:
 572                         dasm_error("Invalid TKIP flags %X", flags);
 573                 }
 574                 disasm_std_operand(stmt, 0, 0);
 575                 disasm_std_operand(stmt, 2, 2);
 576                 break;
 577         }
 578         case 0x001: {
 579                 unsigned int mask;
 580
 581                 stmt->u.insn.name = "nap";
 582                 switch (cmdargs.arch) {
 583                 case 5:
 584                         mask = 0xBC0;
 585                         break;
 586                 case 15:
 587                         mask = 0x1780;
 588                         break;
 589                 default:
 590                         dasm_int_error("NAP invalid arch");
 591                 }
 592                 if (stmt->u.insn.bin->operands[0] != mask) {
 593                         dasm_warn("NAP: invalid first argument 0x%04X\n",
 594                                   stmt->u.insn.bin->operands[0]);
 595                 }
 596                 if (stmt->u.insn.bin->operands[1] != mask) {
 597                         dasm_warn("NAP: invalid second argument 0x%04X\n",
 598                                   stmt->u.insn.bin->operands[1]);
 599                 }
 600                 if (stmt->u.insn.bin->operands[2] != 0) {
 601                         dasm_warn("NAP: invalid third argument 0x%04X\n",
 602                                   stmt->u.insn.bin->operands[2]);
 603                 }
 604                 break;
 605         }
 606         case 0x000:
 607                 disasm_opcode_raw(ctx, stmt, 1);
 608                 break;
 609         default:
 610                 disasm_opcode_raw(ctx, stmt, (cmdargs.unknown_decode == 0));
 611                 break;
 612         }
 613 }
 614
 615 static void disasm_opcodes(struct disassembler_context *ctx)
 616 {
 617         struct bin_instruction *bin;
 618         size_t i;
 619         struct statement *stmt;
 620         char *str;
 621
 622         for (i = 0; i < ctx->nr_insns; i++) {
 623                 bin = &(ctx->code[i]);
 624
 625                 stmt = xmalloc(sizeof(struct statement));
 626                 stmt->type = STMT_INSN;
 627                 INIT_LIST_HEAD(&stmt->list);
 628                 stmt->u.insn.bin = bin;
 629                 stmt->u.insn.is_labelref = -1;
 630
 631                 switch (bin->opcode & 0xF00) {
 632                 case 0x200:
 633                         stmt->u.insn.name = "srx";
 634
 635                         str = xmalloc(3);
 636                         snprintf(str, 3, "%d", (bin->opcode & 0x0F0) >> 4);
 637                         stmt->u.insn.operands[0] = str;
 638                         str = xmalloc(3);
 639                         snprintf(str, 3, "%d", (bin->opcode & 0x00F));
 640                         stmt->u.insn.operands[1] = str;
 641
 642                         disasm_std_operand(stmt, 0, 2);
 643                         disasm_std_operand(stmt, 1, 3);
 644                         disasm_std_operand(stmt, 2, 4);
 645                         break;
 646                 case 0x300:
 647                         stmt->u.insn.name = "orx";
 648
 649                         str = xmalloc(3);
 650                         snprintf(str, 3, "%d", (bin->opcode & 0x0F0) >> 4);
 651                         stmt->u.insn.operands[0] = str;
 652                         str = xmalloc(3);
 653                         snprintf(str, 3, "%d", (bin->opcode & 0x00F));
 654                         stmt->u.insn.operands[1] = str;
 655
 656                         disasm_std_operand(stmt, 0, 2);
 657                         disasm_std_operand(stmt, 1, 3);
 658                         disasm_std_operand(stmt, 2, 4);
 659                         break;
 660                 case 0x400:
 661                         stmt->u.insn.name = "jzx";
 662
 663                         str = xmalloc(3);
 664                         snprintf(str, 3, "%d", (bin->opcode & 0x0F0) >> 4);
 665                         stmt->u.insn.operands[0] = str;
 666                         str = xmalloc(3);
 667                         snprintf(str, 3, "%d", (bin->opcode & 0x00F));
 668                         stmt->u.insn.operands[1] = str;
 669
 670                         disasm_std_operand(stmt, 0, 2);
 671                         disasm_std_operand(stmt, 1, 3);
 672                         stmt->u.insn.is_labelref = 4;
 673                         stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 674                         break;
 675                 case 0x500:
 676                         stmt->u.insn.name = "jnzx";
 677
 678                         str = xmalloc(3);
 679                         snprintf(str, 3, "%d", (bin->opcode & 0x0F0) >> 4);
 680                         stmt->u.insn.operands[0] = str;
 681                         str = xmalloc(3);
 682                         snprintf(str, 3, "%d", (bin->opcode & 0x00F));
 683                         stmt->u.insn.operands[1] = str;
 684
 685                         disasm_std_operand(stmt, 0, 2);
 686                         disasm_std_operand(stmt, 1, 3);
 687                         stmt->u.insn.is_labelref = 4;
 688                         stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 689                         break;
 690                 case 0x600:
 691                         stmt->u.insn.name = "jnext";
 692
 693                         str = xmalloc(5);
 694                         snprintf(str, 5, "0x%02X", (bin->opcode & 0x0FF));
 695                         stmt->u.insn.operands[0] = str;
 696
 697                         /* We don't disassemble the first and second operand, as
 698                          * that always is a dummy r0 operand.
 699                          * disasm_std_operand(stmt, 0, 1);
 700                          * disasm_std_operand(stmt, 1, 2);
 701                          * stmt->u.insn.is_labelref = 3;
 702                          */
 703                         stmt->u.insn.is_labelref = 1;
 704                         stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 705                         break;
 706                 case 0x700:
 707                         stmt->u.insn.name = "jext";
 708
 709                         str = xmalloc(5);
 710                         snprintf(str, 5, "0x%02X", (bin->opcode & 0x0FF));
 711                         stmt->u.insn.operands[0] = str;
 712
 713                         /* We don't disassemble the first and second operand, as
 714                          * that always is a dummy r0 operand.
 715                          * disasm_std_operand(stmt, 0, 1);
 716                          * disasm_std_operand(stmt, 1, 2);
 717                          * stmt->u.insn.is_labelref = 3;
 718                          */
 719                         stmt->u.insn.is_labelref = 1;
 720                         stmt->u.insn.labeladdr = stmt->u.insn.bin->operands[2];
 721                         break;
 722                 default:
 723                         disasm_constant_opcodes(ctx, stmt);
 724                         break;
 725                 }
 726
 727                 list_add_tail(&stmt->list, &ctx->stmt_list);
 728         }
 729 }
 730
 731 static struct statement * get_label_at(struct disassembler_context *ctx,
 732                                        unsigned int addr)
 733 {
 734         unsigned int addrcnt = 0;
 735         struct statement *stmt, *ret, *prev;
 736
 737         list_for_each_entry(stmt, &ctx->stmt_list, list) {
 738                 if (stmt->type != STMT_INSN)
 739                         continue;
 740                 if (addrcnt == addr) {
 741                         prev = list_entry(stmt->list.prev, struct statement, list);
 742                         if (prev->type == STMT_LABEL)
 743                                 return prev;
 744                         ret = xmalloc(sizeof(struct statement));
 745                         INIT_LIST_HEAD(&ret->list);
 746                         ret->type = STMT_LABEL;
 747                         list_add(&ret->list, &prev->list);
 748
 749                         return ret;
 750                 }
 751                 addrcnt++;
 752         }
 753
 754         return NULL;
 755 }
 756
 757 static void resolve_labels(struct disassembler_context *ctx)
 758 {
 759         struct statement *stmt;
 760         struct statement *label;
 761         struct statement *n;
 762         unsigned int labeladdr;
 763         unsigned int namecnt = 0;
 764
 765         /* Resolve label references */
 766         list_for_each_entry_safe(stmt, n, &ctx->stmt_list, list) {
 767                 if (stmt->type != STMT_INSN)
 768                         continue;
 769                 if (stmt->u.insn.is_labelref == -1)
 770                         continue;
 771                 labeladdr = stmt->u.insn.labeladdr;
 772                 label = get_label_at(ctx, labeladdr);
 773                 if (!label)
 774                         dasm_error("Labeladdress %X out of bounds", labeladdr);
 775                 stmt->u.insn.labelref = label;
 776         }
 777
 778         /* Name the labels */
 779         list_for_each_entry(stmt, &ctx->stmt_list, list) {
 780                 if (stmt->type != STMT_LABEL)
 781                         continue;
 782                 stmt->u.label.name = xmalloc(20);
 783                 snprintf(stmt->u.label.name, 20, "L%u", namecnt);
 784                 namecnt++;
 785         }
 786 }
 787
 788 static void emit_asm(struct disassembler_context *ctx)
 789 {
 790         struct statement *stmt;
 791         int first, i;
 792         int err;
 793         unsigned int addr = 0;
 794
 795         err = open_output_file();
 796         if (err)
 797                 exit(1);
 798
 799         fprintf(outfile, "%%arch %u\n", ctx->arch);
 800         fprintf(outfile, "%%start entry\n\n");
 801         fprintf(outfile, "entry:\n");
 802         list_for_each_entry(stmt, &ctx->stmt_list, list) {
 803                 switch (stmt->type) {
 804                 case STMT_INSN:
 805                         if (cmdargs.print_addresses)
 806                                 fprintf(outfile, "/* %03X */", addr);
 807                         fprintf(outfile, "\t%s", stmt->u.insn.name);
 808                         first = 1;
 809                         for (i = 0; i < ARRAY_SIZE(stmt->u.insn.operands); i++) {
 810                                 if (!stmt->u.insn.operands[i] &&
 811                                     stmt->u.insn.is_labelref != i)
 812                                         continue;
 813                                 if (first)
 814                                         fprintf(outfile, "\t");
 815                                 if (!first)
 816                                         fprintf(outfile, ", ");
 817                                 first = 0;
 818                                 if (stmt->u.insn.is_labelref == i) {
 819                                         fprintf(outfile, "%s",
 820                                                 stmt->u.insn.labelref->u.label.name);
 821                                 } else {
 822                                         fprintf(outfile, "%s",
 823                                                 stmt->u.insn.operands[i]);
 824                                 }
 825                         }
 826                         fprintf(outfile, "\n");
 827                         addr++;
 828                         break;
 829                 case STMT_LABEL:
 830                         fprintf(outfile, "%s:\n", stmt->u.label.name);
 831                         break;
 832                 }
 833         }
 834
 835         close_output_file();
 836 }
 837
 838 static int read_input(struct disassembler_context *ctx)
 839 {
 840         size_t size = 0, pos = 0;
 841         size_t ret;
 842         struct bin_instruction *code = NULL;
 843         unsigned char tmp[sizeof(uint64_t)];
 844         uint64_t codeword;
 845         struct fw_header hdr;
 846         int err;
 847
 848         err = open_input_file();
 849         if (err)
 850                 goto error;
 851
 852         switch (cmdargs.informat) {
 853         case FMT_RAW_LE32:
 854         case FMT_RAW_BE32:
 855                 /* Nothing */
 856                 break;
 857         case FMT_B43:
 858                 ret = fread(&hdr, 1, sizeof(hdr), infile);
 859                 if (ret != sizeof(hdr)) {
 860                         fprintf(stderr, "Corrupt input file (not fwcutter output)\n");
 861                         goto err_close;
 862                 }
 863                 if (hdr.type != FW_TYPE_UCODE) {
 864                         fprintf(stderr, "Corrupt input file. Not a microcode image.\n");
 865                         goto err_close;
 866                 }
 867                 if (hdr.ver != FW_HDR_VER) {
 868                         fprintf(stderr, "Invalid input file header version.\n");
 869                         goto err_close;
 870                 }
 871                 break;
 872         }
 873
 874         while (1) {
 875                 if (pos >= size) {
 876                         size += 512;
 877                         code = xrealloc(code, size * sizeof(struct bin_instruction));
 878                 }
 879                 ret = fread(tmp, 1, sizeof(uint64_t), infile);
 880                 if (!ret)
 881                         break;
 882                 if (ret != sizeof(uint64_t)) {
 883                         fprintf(stderr, "Corrupt input file (not 8 byte aligned)\n");
 884                         goto err_free_code;
 885                 }
 886
 887                 switch (cmdargs.informat) {
 888                 case FMT_B43:
 889                 case FMT_RAW_BE32:
 890                         codeword = 0;
 891                         codeword |= ((uint64_t)tmp[0]) << 56;
 892                         codeword |= ((uint64_t)tmp[1]) << 48;
 893                         codeword |= ((uint64_t)tmp[2]) << 40;
 894                         codeword |= ((uint64_t)tmp[3]) << 32;
 895                         codeword |= ((uint64_t)tmp[4]) << 24;
 896                         codeword |= ((uint64_t)tmp[5]) << 16;
 897                         codeword |= ((uint64_t)tmp[6]) << 8;
 898                         codeword |= ((uint64_t)tmp[7]);
 899                         codeword = ((codeword & (uint64_t)0xFFFFFFFF00000000ULL) >> 32) |
 900                                    ((codeword & (uint64_t)0x00000000FFFFFFFFULL) << 32);
 901                         break;
 902                 case FMT_RAW_LE32:
 903                         codeword = 0;
 904                         codeword |= ((uint64_t)tmp[7]) << 56;
 905                         codeword |= ((uint64_t)tmp[6]) << 48;
 906                         codeword |= ((uint64_t)tmp[5]) << 40;
 907                         codeword |= ((uint64_t)tmp[4]) << 32;
 908                         codeword |= ((uint64_t)tmp[3]) << 24;
 909                         codeword |= ((uint64_t)tmp[2]) << 16;
 910                         codeword |= ((uint64_t)tmp[1]) << 8;
 911                         codeword |= ((uint64_t)tmp[0]);
 912                         break;
 913                 }
 914
 915                 switch (cmdargs.arch) {
 916                 case 5:
 917                         if (codeword >> 48) {
 918                                 fprintf(stderr, "Instruction format error at 0x%X (upper not clear). "
 919                                         "Wrong input format or architecture?\n", (unsigned int)pos);
 920                                 goto err_free_code;
 921                         }
 922                         code[pos].opcode = (codeword >> 36) & 0xFFF;
 923                         code[pos].operands[2] = codeword & 0xFFF;
 924                         code[pos].operands[1] = (codeword >> 12) & 0xFFF;
 925                         code[pos].operands[0] = (codeword >> 24) & 0xFFF;
 926                         break;
 927                 case 15:
 928                         if (codeword >> 51) {
 929                                 fprintf(stderr, "Instruction format error at 0x%X (upper not clear). "
 930                                         "Wrong input format or architecture?\n", (unsigned int)pos);
 931                                 goto err_free_code;
 932                         }
 933                         code[pos].opcode = (codeword >> 39) & 0xFFF;
 934                         code[pos].operands[2] = codeword & 0x1FFF;
 935                         code[pos].operands[1] = (codeword >> 13) & 0x1FFF;
 936                         code[pos].operands[0] = (codeword >> 26) & 0x1FFF;
 937                         break;
 938                 default:
 939                         fprintf(stderr, "Internal error: read_input unknown arch %u\n",
 940                                 cmdargs.arch);
 941                         goto err_free_code;
 942                 }
 943
 944                 pos++;
 945         }
 946
 947         ctx->code = code;
 948         ctx->nr_insns = pos;
 949
 950         close_input_file();
 951
 952         return 0;
 953
 954 err_free_code:
 955         free(code);
 956 err_close:
 957         close_input_file();
 958 error:
 959         return -1;
 960 }
 961
 962 static void disassemble(void)
 963 {
 964         struct disassembler_context ctx;
 965         int err;
 966
 967         memset(&ctx, 0, sizeof(ctx));
 968         INIT_LIST_HEAD(&ctx.stmt_list);
 969         ctx.arch = cmdargs.arch;
 970
 971         err = read_input(&ctx);
 972         if (err)
 973                 exit(1);
 974         disasm_opcodes(&ctx);
 975         resolve_labels(&ctx);
 976         emit_asm(&ctx);
 977 }
 978
 979 int main(int argc, char **argv)
 980 {
 981         int err, res = 1;
 982
 983         err = parse_args(argc, argv);
 984         if (err < 0)
 985                 goto out;
 986         if (err > 0) {
 987                 res = 0;
 988                 goto out;
 989         }
 990         disassemble();
 991         res = 0;
 992 out:
 993         /* Lazyman simply leaks all allocated memory. */
 994         return res;
 995 }