1 /* $NetBSD: disassem.c,v 1.14 2003/03/27 16:58:36 mycroft Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 Mark Brinicombe. 5 * Copyright (c) 1996 Brini. 6 * 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Brini. 20 * 4. The name of the company nor the name of the author may be used to 21 * endorse or promote products derived from this software without specific 22 * prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * RiscBSD kernel project 37 * 38 * db_disasm.c 39 * 40 * Kernel disassembler 41 * 42 * Created : 10/02/96 43 * 44 * Structured after the sparc/sparc/db_disasm.c by David S. Miller & 45 * Paul Kranenburg 46 * 47 * This code is not complete. Not all instructions are disassembled. 48 */ 49 50 #include <sys/cdefs.h> 51 //__FBSDID("$FreeBSD: /repoman/r/ncvs/src/sys/arm/arm/disassem.c,v 1.2 2005/01/05 21:58:47 imp Exp $"); 52 #include <sys/param.h> 53 #include <stdio.h> 54 55 #include "disassem.h" 56 #include "armreg.h" 57 //#include <ddb/ddb.h> 58 59 /* 60 * General instruction format 61 * 62 * insn[cc][mod] [operands] 63 * 64 * Those fields with an uppercase format code indicate that the field 65 * follows directly after the instruction before the separator i.e. 66 * they modify the instruction rather than just being an operand to 67 * the instruction. The only exception is the writeback flag which 68 * follows a operand. 69 * 70 * 71 * 2 - print Operand 2 of a data processing instruction 72 * d - destination register (bits 12-15) 73 * n - n register (bits 16-19) 74 * s - s register (bits 8-11) 75 * o - indirect register rn (bits 16-19) (used by swap) 76 * m - m register (bits 0-3) 77 * a - address operand of ldr/str instruction 78 * e - address operand of ldrh/strh instruction 79 * l - register list for ldm/stm instruction 80 * f - 1st fp operand (register) (bits 12-14) 81 * g - 2nd fp operand (register) (bits 16-18) 82 * h - 3rd fp operand (register/immediate) (bits 0-4) 83 * b - branch address 84 * t - thumb branch address (bits 24, 0-23) 85 * k - breakpoint comment (bits 0-3, 8-19) 86 * X - block transfer type 87 * Y - block transfer type (r13 base) 88 * c - comment field bits(0-23) 89 * p - saved or current status register 90 * F - PSR transfer fields 91 * D - destination-is-r15 (P) flag on TST, TEQ, CMP, CMN 92 * L - co-processor transfer size 93 * S - set status flag 94 * P - fp precision 95 * Q - fp precision (for ldf/stf) 96 * R - fp rounding 97 * v - co-processor data transfer registers + addressing mode 98 * W - writeback flag 99 * x - instruction in hex 100 * # - co-processor number 101 * y - co-processor data processing registers 102 * z - co-processor register transfer registers 103 */ 104 105 struct arm32_insn { 106 u_int mask; 107 u_int pattern; 108 char* name; 109 char* format; 110 }; 111 112 static const struct arm32_insn arm32_i[] = { 113 { 0x0fffffff, 0x0ff00000, "imb", "c" }, /* Before swi */ 114 { 0x0fffffff, 0x0ff00001, "imbrange", "c" }, /* Before swi */ 115 { 0x0f000000, 0x0f000000, "swi", "c" }, 116 { 0xfe000000, 0xfa000000, "blx", "t" }, /* Before b and bl */ 117 { 0x0f000000, 0x0a000000, "b", "b" }, 118 { 0x0f000000, 0x0b000000, "bl", "b" }, 119 { 0x0fe000f0, 0x00000090, "mul", "Snms" }, 120 { 0x0fe000f0, 0x00200090, "mla", "Snmsd" }, 121 { 0x0fe000f0, 0x00800090, "umull", "Sdnms" }, 122 { 0x0fe000f0, 0x00c00090, "smull", "Sdnms" }, 123 { 0x0fe000f0, 0x00a00090, "umlal", "Sdnms" }, 124 { 0x0fe000f0, 0x00e00090, "smlal", "Sdnms" }, 125 { 0x0d700000, 0x04200000, "strt", "daW" }, 126 { 0x0d700000, 0x04300000, "ldrt", "daW" }, 127 { 0x0d700000, 0x04600000, "strbt", "daW" }, 128 { 0x0d700000, 0x04700000, "ldrbt", "daW" }, 129 { 0x0c500000, 0x04000000, "str", "daW" }, 130 { 0x0c500000, 0x04100000, "ldr", "daW" }, 131 { 0x0c500000, 0x04400000, "strb", "daW" }, 132 { 0x0c500000, 0x04500000, "ldrb", "daW" }, 133 { 0x0e1f0000, 0x080d0000, "stm", "YnWl" },/* separate out r13 base */ 134 { 0x0e1f0000, 0x081d0000, "ldm", "YnWl" },/* separate out r13 base */ 135 { 0x0e100000, 0x08000000, "stm", "XnWl" }, 136 { 0x0e100000, 0x08100000, "ldm", "XnWl" }, 137 { 0x0e1000f0, 0x00100090, "ldrb", "deW" }, 138 { 0x0e1000f0, 0x00000090, "strb", "deW" }, 139 { 0x0e1000f0, 0x001000d0, "ldrsb", "deW" }, 140 { 0x0e1000f0, 0x001000b0, "ldrh", "deW" }, 141 { 0x0e1000f0, 0x000000b0, "strh", "deW" }, 142 { 0x0e1000f0, 0x001000f0, "ldrsh", "deW" }, 143 { 0x0f200090, 0x00200090, "und", "x" }, /* Before data processing */ 144 { 0x0e1000d0, 0x000000d0, "und", "x" }, /* Before data processing */ 145 { 0x0ff00ff0, 0x01000090, "swp", "dmo" }, 146 { 0x0ff00ff0, 0x01400090, "swpb", "dmo" }, 147 { 0x0fbf0fff, 0x010f0000, "mrs", "dp" }, /* Before data processing */ 148 { 0x0fb0fff0, 0x0120f000, "msr", "pFm" },/* Before data processing */ 149 { 0x0fb0f000, 0x0320f000, "msr", "pF2" },/* Before data processing */ 150 { 0x0ffffff0, 0x012fff10, "bx", "m" }, 151 { 0x0fff0ff0, 0x016f0f10, "clz", "dm" }, 152 { 0x0ffffff0, 0x012fff30, "blx", "m" }, 153 { 0xfff000f0, 0xe1200070, "bkpt", "k" }, 154 { 0x0de00000, 0x00000000, "and", "Sdn2" }, 155 { 0x0de00000, 0x00200000, "eor", "Sdn2" }, 156 { 0x0de00000, 0x00400000, "sub", "Sdn2" }, 157 { 0x0de00000, 0x00600000, "rsb", "Sdn2" }, 158 { 0x0de00000, 0x00800000, "add", "Sdn2" }, 159 { 0x0de00000, 0x00a00000, "adc", "Sdn2" }, 160 { 0x0de00000, 0x00c00000, "sbc", "Sdn2" }, 161 { 0x0de00000, 0x00e00000, "rsc", "Sdn2" }, 162 { 0x0df00000, 0x01100000, "tst", "Dn2" }, 163 { 0x0df00000, 0x01300000, "teq", "Dn2" }, 164 { 0x0df00000, 0x01500000, "cmp", "Dn2" }, 165 { 0x0df00000, 0x01700000, "cmn", "Dn2" }, 166 { 0x0de00000, 0x01800000, "orr", "Sdn2" }, 167 { 0x0de00000, 0x01a00000, "mov", "Sd2" }, 168 { 0x0de00000, 0x01c00000, "bic", "Sdn2" }, 169 { 0x0de00000, 0x01e00000, "mvn", "Sd2" }, 170 { 0x0ff08f10, 0x0e000100, "adf", "PRfgh" }, 171 { 0x0ff08f10, 0x0e100100, "muf", "PRfgh" }, 172 { 0x0ff08f10, 0x0e200100, "suf", "PRfgh" }, 173 { 0x0ff08f10, 0x0e300100, "rsf", "PRfgh" }, 174 { 0x0ff08f10, 0x0e400100, "dvf", "PRfgh" }, 175 { 0x0ff08f10, 0x0e500100, "rdf", "PRfgh" }, 176 { 0x0ff08f10, 0x0e600100, "pow", "PRfgh" }, 177 { 0x0ff08f10, 0x0e700100, "rpw", "PRfgh" }, 178 { 0x0ff08f10, 0x0e800100, "rmf", "PRfgh" }, 179 { 0x0ff08f10, 0x0e900100, "fml", "PRfgh" }, 180 { 0x0ff08f10, 0x0ea00100, "fdv", "PRfgh" }, 181 { 0x0ff08f10, 0x0eb00100, "frd", "PRfgh" }, 182 { 0x0ff08f10, 0x0ec00100, "pol", "PRfgh" }, 183 { 0x0f008f10, 0x0e000100, "fpbop", "PRfgh" }, 184 { 0x0ff08f10, 0x0e008100, "mvf", "PRfh" }, 185 { 0x0ff08f10, 0x0e108100, "mnf", "PRfh" }, 186 { 0x0ff08f10, 0x0e208100, "abs", "PRfh" }, 187 { 0x0ff08f10, 0x0e308100, "rnd", "PRfh" }, 188 { 0x0ff08f10, 0x0e408100, "sqt", "PRfh" }, 189 { 0x0ff08f10, 0x0e508100, "log", "PRfh" }, 190 { 0x0ff08f10, 0x0e608100, "lgn", "PRfh" }, 191 { 0x0ff08f10, 0x0e708100, "exp", "PRfh" }, 192 { 0x0ff08f10, 0x0e808100, "sin", "PRfh" }, 193 { 0x0ff08f10, 0x0e908100, "cos", "PRfh" }, 194 { 0x0ff08f10, 0x0ea08100, "tan", "PRfh" }, 195 { 0x0ff08f10, 0x0eb08100, "asn", "PRfh" }, 196 { 0x0ff08f10, 0x0ec08100, "acs", "PRfh" }, 197 { 0x0ff08f10, 0x0ed08100, "atn", "PRfh" }, 198 { 0x0f008f10, 0x0e008100, "fpuop", "PRfh" }, 199 { 0x0e100f00, 0x0c000100, "stf", "QLv" }, 200 { 0x0e100f00, 0x0c100100, "ldf", "QLv" }, 201 { 0x0ff00f10, 0x0e000110, "flt", "PRgd" }, 202 { 0x0ff00f10, 0x0e100110, "fix", "PRdh" }, 203 { 0x0ff00f10, 0x0e200110, "wfs", "d" }, 204 { 0x0ff00f10, 0x0e300110, "rfs", "d" }, 205 { 0x0ff00f10, 0x0e400110, "wfc", "d" }, 206 { 0x0ff00f10, 0x0e500110, "rfc", "d" }, 207 { 0x0ff0ff10, 0x0e90f110, "cmf", "PRgh" }, 208 { 0x0ff0ff10, 0x0eb0f110, "cnf", "PRgh" }, 209 { 0x0ff0ff10, 0x0ed0f110, "cmfe", "PRgh" }, 210 { 0x0ff0ff10, 0x0ef0f110, "cnfe", "PRgh" }, 211 { 0xff100010, 0xfe000010, "mcr2", "#z" }, 212 { 0x0f100010, 0x0e000010, "mcr", "#z" }, 213 { 0xff100010, 0xfe100010, "mrc2", "#z" }, 214 { 0x0f100010, 0x0e100010, "mrc", "#z" }, 215 { 0xff000010, 0xfe000000, "cdp2", "#y" }, 216 { 0x0f000010, 0x0e000000, "cdp", "#y" }, 217 { 0xfe100090, 0xfc100000, "ldc2", "L#v" }, 218 { 0x0e100090, 0x0c100000, "ldc", "L#v" }, 219 { 0xfe100090, 0xfc000000, "stc2", "L#v" }, 220 { 0x0e100090, 0x0c000000, "stc", "L#v" }, 221 { 0xf550f000, 0xf550f000, "pld", "ne" }, 222 { 0x0ff00ff0, 0x01000050, "qaad", "dmn" }, 223 { 0x0ff00ff0, 0x01400050, "qdaad", "dmn" }, 224 { 0x0ff00ff0, 0x01600050, "qdsub", "dmn" }, 225 { 0x0ff00ff0, 0x01200050, "dsub", "dmn" }, 226 { 0x0ff000f0, 0x01000080, "smlabb", "nmsd" }, // d & n inverted!! 227 { 0x0ff000f0, 0x010000a0, "smlatb", "nmsd" }, // d & n inverted!! 228 { 0x0ff000f0, 0x010000c0, "smlabt", "nmsd" }, // d & n inverted!! 229 { 0x0ff000f0, 0x010000e0, "smlatt", "nmsd" }, // d & n inverted!! 230 { 0x0ff000f0, 0x01400080, "smlalbb","ndms" }, // d & n inverted!! 231 { 0x0ff000f0, 0x014000a0, "smlaltb","ndms" }, // d & n inverted!! 232 { 0x0ff000f0, 0x014000c0, "smlalbt","ndms" }, // d & n inverted!! 233 { 0x0ff000f0, 0x014000e0, "smlaltt","ndms" }, // d & n inverted!! 234 { 0x0ff000f0, 0x01200080, "smlawb", "nmsd" }, // d & n inverted!! 235 { 0x0ff0f0f0, 0x012000a0, "smulwb","nms" }, // d & n inverted!! 236 { 0x0ff000f0, 0x012000c0, "smlawt", "nmsd" }, // d & n inverted!! 237 { 0x0ff0f0f0, 0x012000e0, "smulwt","nms" }, // d & n inverted!! 238 { 0x0ff0f0f0, 0x01600080, "smulbb","nms" }, // d & n inverted!! 239 { 0x0ff0f0f0, 0x016000a0, "smultb","nms" }, // d & n inverted!! 240 { 0x0ff0f0f0, 0x016000c0, "smulbt","nms" }, // d & n inverted!! 241 { 0x0ff0f0f0, 0x016000e0, "smultt","nms" }, // d & n inverted!! 242 { 0x00000000, 0x00000000, NULL, NULL } 243 }; 244 245 static char const arm32_insn_conditions[][4] = { 246 "eq", "ne", "cs", "cc", 247 "mi", "pl", "vs", "vc", 248 "hi", "ls", "ge", "lt", 249 "gt", "le", "", "nv" 250 }; 251 252 static char const insn_block_transfers[][4] = { 253 "da", "ia", "db", "ib" 254 }; 255 256 static char const insn_stack_block_transfers[][4] = { 257 "ed", "ea", "fd", "fa" 258 }; 259 260 static char const op_shifts[][4] = { 261 "lsl", "lsr", "asr", "ror" 262 }; 263 264 static char const insn_fpa_rounding[][2] = { 265 "", "p", "m", "z" 266 }; 267 268 static char const insn_fpa_precision[][2] = { 269 "s", "d", "e", "p" 270 }; 271 272 static char const insn_fpaconstants[][8] = { 273 "0.0", "1.0", "2.0", "3.0", 274 "4.0", "5.0", "0.5", "10.0" 275 }; 276 277 #define insn_condition(x) arm32_insn_conditions[(x >> 28) & 0x0f] 278 #define insn_blktrans(x) insn_block_transfers[(x >> 23) & 3] 279 #define insn_stkblktrans(x) insn_stack_block_transfers[(x >> 23) & 3] 280 #define op2_shift(x) op_shifts[(x >> 5) & 3] 281 #define insn_fparnd(x) insn_fpa_rounding[(x >> 5) & 0x03] 282 #define insn_fpaprec(x) insn_fpa_precision[(((x >> 18) & 2)|(x >> 7)) & 1] 283 #define insn_fpaprect(x) insn_fpa_precision[(((x >> 21) & 2)|(x >> 15)) & 1] 284 #define insn_fpaimm(x) insn_fpaconstants[x & 0x07] 285 286 /* Local prototypes */ 287 static void disasm_register_shift(const disasm_interface_t *di, u_int insn); 288 static void disasm_print_reglist(const disasm_interface_t *di, u_int insn); 289 static void disasm_insn_ldrstr(const disasm_interface_t *di, u_int insn, 290 u_int loc); 291 static void disasm_insn_ldrhstrh(const disasm_interface_t *di, u_int insn, 292 u_int loc); 293 static void disasm_insn_ldcstc(const disasm_interface_t *di, u_int insn, 294 u_int loc); 295 static u_int disassemble_readword(u_int address); 296 static void disassemble_printaddr(u_int address); 297 298 u_int 299 disasm(const disasm_interface_t *di, u_int loc, int altfmt) 300 { 301 const struct arm32_insn *i_ptr = &arm32_i[0]; 302 303 u_int insn; 304 int matchp; 305 int branch; 306 char* f_ptr; 307 int fmt; 308 309 fmt = 0; 310 matchp = 0; 311 insn = di->di_readword(loc); 312 313 /* di->di_printf("loc=%08x insn=%08x : ", loc, insn);*/ 314 315 while (i_ptr->name) { 316 if ((insn & i_ptr->mask) == i_ptr->pattern) { 317 matchp = 1; 318 break; 319 } 320 i_ptr++; 321 } 322 323 if (!matchp) { 324 di->di_printf("und%s\t%08x\n", insn_condition(insn), insn); 325 return(loc + INSN_SIZE); 326 } 327 328 /* If instruction forces condition code, don't print it. */ 329 if ((i_ptr->mask & 0xf0000000) == 0xf0000000) 330 di->di_printf("%s", i_ptr->name); 331 else 332 di->di_printf("%s%s", i_ptr->name, insn_condition(insn)); 333 334 f_ptr = i_ptr->format; 335 336 /* Insert tab if there are no instruction modifiers */ 337 338 if (*(f_ptr) < 'A' || *(f_ptr) > 'Z') { 339 ++fmt; 340 di->di_printf("\t"); 341 } 342 343 while (*f_ptr) { 344 switch (*f_ptr) { 345 /* 2 - print Operand 2 of a data processing instruction */ 346 case '2': 347 if (insn & 0x02000000) { 348 int rotate= ((insn >> 7) & 0x1e); 349 350 di->di_printf("#0x%08x", 351 (insn & 0xff) << (32 - rotate) | 352 (insn & 0xff) >> rotate); 353 } else { 354 disasm_register_shift(di, insn); 355 } 356 break; 357 /* d - destination register (bits 12-15) */ 358 case 'd': 359 di->di_printf("r%d", ((insn >> 12) & 0x0f)); 360 break; 361 /* D - insert 'p' if Rd is R15 */ 362 case 'D': 363 if (((insn >> 12) & 0x0f) == 15) 364 di->di_printf("p"); 365 break; 366 /* n - n register (bits 16-19) */ 367 case 'n': 368 di->di_printf("r%d", ((insn >> 16) & 0x0f)); 369 break; 370 /* s - s register (bits 8-11) */ 371 case 's': 372 di->di_printf("r%d", ((insn >> 8) & 0x0f)); 373 break; 374 /* o - indirect register rn (bits 16-19) (used by swap) */ 375 case 'o': 376 di->di_printf("[r%d]", ((insn >> 16) & 0x0f)); 377 break; 378 /* m - m register (bits 0-4) */ 379 case 'm': 380 di->di_printf("r%d", ((insn >> 0) & 0x0f)); 381 break; 382 /* a - address operand of ldr/str instruction */ 383 case 'a': 384 disasm_insn_ldrstr(di, insn, loc); 385 break; 386 /* e - address operand of ldrh/strh instruction */ 387 case 'e': 388 disasm_insn_ldrhstrh(di, insn, loc); 389 break; 390 /* l - register list for ldm/stm instruction */ 391 case 'l': 392 disasm_print_reglist(di, insn); 393 break; 394 /* f - 1st fp operand (register) (bits 12-14) */ 395 case 'f': 396 di->di_printf("f%d", (insn >> 12) & 7); 397 break; 398 /* g - 2nd fp operand (register) (bits 16-18) */ 399 case 'g': 400 di->di_printf("f%d", (insn >> 16) & 7); 401 break; 402 /* h - 3rd fp operand (register/immediate) (bits 0-4) */ 403 case 'h': 404 if (insn & (1 << 3)) 405 di->di_printf("#%s", insn_fpaimm(insn)); 406 else 407 di->di_printf("f%d", insn & 7); 408 break; 409 /* b - branch address */ 410 case 'b': 411 branch = ((insn << 2) & 0x03ffffff); 412 if (branch & 0x02000000) 413 branch |= 0xfc000000; 414 di->di_printaddr(loc + 8 + branch); 415 break; 416 /* t - blx address */ 417 case 't': 418 branch = ((insn << 2) & 0x03ffffff) | 419 (insn >> 23 & 0x00000002); 420 if (branch & 0x02000000) 421 branch |= 0xfc000000; 422 di->di_printaddr(loc + 8 + branch); 423 break; 424 /* X - block transfer type */ 425 case 'X': 426 di->di_printf("%s", insn_blktrans(insn)); 427 break; 428 /* Y - block transfer type (r13 base) */ 429 case 'Y': 430 di->di_printf("%s", insn_stkblktrans(insn)); 431 break; 432 /* c - comment field bits(0-23) */ 433 case 'c': 434 di->di_printf("0x%08x", (insn & 0x00ffffff)); 435 break; 436 /* k - breakpoint comment (bits 0-3, 8-19) */ 437 case 'k': 438 di->di_printf("0x%04x", 439 (insn & 0x000fff00) >> 4 | (insn & 0x0000000f)); 440 break; 441 /* p - saved or current status register */ 442 case 'p': 443 if (insn & 0x00400000) 444 di->di_printf("spsr"); 445 else 446 di->di_printf("cpsr"); 447 break; 448 /* F - PSR transfer fields */ 449 case 'F': 450 di->di_printf("_"); 451 if (insn & (1 << 16)) 452 di->di_printf("c"); 453 if (insn & (1 << 17)) 454 di->di_printf("x"); 455 if (insn & (1 << 18)) 456 di->di_printf("s"); 457 if (insn & (1 << 19)) 458 di->di_printf("f"); 459 break; 460 /* B - byte transfer flag */ 461 case 'B': 462 if (insn & 0x00400000) 463 di->di_printf("b"); 464 break; 465 /* L - co-processor transfer size */ 466 case 'L': 467 if (insn & (1 << 22)) 468 di->di_printf("l"); 469 break; 470 /* S - set status flag */ 471 case 'S': 472 if (insn & 0x00100000) 473 di->di_printf("s"); 474 break; 475 /* P - fp precision */ 476 case 'P': 477 di->di_printf("%s", insn_fpaprec(insn)); 478 break; 479 /* Q - fp precision (for ldf/stf) */ 480 case 'Q': 481 break; 482 /* R - fp rounding */ 483 case 'R': 484 di->di_printf("%s", insn_fparnd(insn)); 485 break; 486 /* W - writeback flag */ 487 case 'W': 488 if (insn & (1 << 21)) 489 di->di_printf("!"); 490 break; 491 /* # - co-processor number */ 492 case '#': 493 di->di_printf("p%d", (insn >> 8) & 0x0f); 494 break; 495 /* v - co-processor data transfer registers+addressing mode */ 496 case 'v': 497 disasm_insn_ldcstc(di, insn, loc); 498 break; 499 /* x - instruction in hex */ 500 case 'x': 501 di->di_printf("0x%08x", insn); 502 break; 503 /* y - co-processor data processing registers */ 504 case 'y': 505 di->di_printf("%d, ", (insn >> 20) & 0x0f); 506 507 di->di_printf("c%d, c%d, c%d", (insn >> 12) & 0x0f, 508 (insn >> 16) & 0x0f, insn & 0x0f); 509 510 di->di_printf(", %d", (insn >> 5) & 0x07); 511 break; 512 /* z - co-processor register transfer registers */ 513 case 'z': 514 di->di_printf("%d, ", (insn >> 21) & 0x07); 515 di->di_printf("r%d, c%d, c%d, %d", 516 (insn >> 12) & 0x0f, (insn >> 16) & 0x0f, 517 insn & 0x0f, (insn >> 5) & 0x07); 518 519 /* if (((insn >> 5) & 0x07) != 0) 520 di->di_printf(", %d", (insn >> 5) & 0x07);*/ 521 break; 522 default: 523 di->di_printf("[%c - unknown]", *f_ptr); 524 break; 525 } 526 if (*(f_ptr+1) >= 'A' && *(f_ptr+1) <= 'Z') 527 ++f_ptr; 528 else if (*(++f_ptr)) { 529 ++fmt; 530 if (fmt == 1) 531 di->di_printf("\t"); 532 else 533 di->di_printf(", "); 534 } 535 }; 536 537 di->di_printf("\n"); 538 539 return(loc + INSN_SIZE); 540 } 541 542 543 static void 544 disasm_register_shift(const disasm_interface_t *di, u_int insn) 545 { 546 di->di_printf("r%d", (insn & 0x0f)); 547 if ((insn & 0x00000ff0) == 0) 548 ; 549 else if ((insn & 0x00000ff0) == 0x00000060) 550 di->di_printf(", rrx"); 551 else { 552 if (insn & 0x10) 553 di->di_printf(", %s r%d", op2_shift(insn), 554 (insn >> 8) & 0x0f); 555 else 556 di->di_printf(", %s #%d", op2_shift(insn), 557 (insn >> 7) & 0x1f); 558 } 559 } 560 561 562 static void 563 disasm_print_reglist(const disasm_interface_t *di, u_int insn) 564 { 565 int loop; 566 int start; 567 int comma; 568 569 di->di_printf("{"); 570 start = -1; 571 comma = 0; 572 573 for (loop = 0; loop < 17; ++loop) { 574 if (start != -1) { 575 if (loop == 16 || !(insn & (1 << loop))) { 576 if (comma) 577 di->di_printf(", "); 578 else 579 comma = 1; 580 if (start == loop - 1) 581 di->di_printf("r%d", start); 582 else 583 di->di_printf("r%d-r%d", start, loop - 1); 584 start = -1; 585 } 586 } else { 587 if (insn & (1 << loop)) 588 start = loop; 589 } 590 } 591 di->di_printf("}"); 592 593 if (insn & (1 << 22)) 594 di->di_printf("^"); 595 } 596 597 static void 598 disasm_insn_ldrstr(const disasm_interface_t *di, u_int insn, u_int loc) 599 { 600 int offset; 601 602 offset = insn & 0xfff; 603 if ((insn & 0x032f0000) == 0x010f0000) { 604 /* rA = pc, immediate index */ 605 if (insn & 0x00800000) 606 loc += offset; 607 else 608 loc -= offset; 609 di->di_printaddr(loc + 8); 610 } else { 611 di->di_printf("[r%d", (insn >> 16) & 0x0f); 612 if ((insn & 0x03000fff) != 0x01000000) { 613 di->di_printf("%s, ", (insn & (1 << 24)) ? "" : "]"); 614 if (!(insn & 0x00800000)) 615 di->di_printf("-"); 616 if (insn & (1 << 25)) 617 disasm_register_shift(di, insn); 618 else 619 di->di_printf("#0x%03x", offset); 620 } 621 if (insn & (1 << 24)) 622 di->di_printf("]"); 623 } 624 } 625 626 static void 627 disasm_insn_ldrhstrh(const disasm_interface_t *di, u_int insn, u_int loc) 628 { 629 int offset; 630 631 offset = ((insn & 0xf00) >> 4) | (insn & 0xf); 632 if ((insn & 0x004f0000) == 0x004f0000) { 633 /* rA = pc, immediate index */ 634 if (insn & 0x00800000) 635 loc += offset; 636 else 637 loc -= offset; 638 di->di_printaddr(loc + 8); 639 } else { 640 di->di_printf("[r%d", (insn >> 16) & 0x0f); 641 if ((insn & 0x01400f0f) != 0x01400000) { 642 di->di_printf("%s, ", (insn & (1 << 24)) ? "" : "]"); 643 if (!(insn & 0x00800000)) 644 di->di_printf("-"); 645 if (insn & (1 << 22)) 646 di->di_printf("#0x%02x", offset); 647 else 648 di->di_printf("r%d", (insn & 0x0f)); 649 } 650 if (insn & (1 << 24)) 651 di->di_printf("]"); 652 } 653 } 654 655 static void 656 disasm_insn_ldcstc(const disasm_interface_t *di, u_int insn, u_int loc) 657 { 658 if (((insn >> 8) & 0xf) == 1) 659 di->di_printf("f%d, ", (insn >> 12) & 0x07); 660 else 661 di->di_printf("c%d, ", (insn >> 12) & 0x0f); 662 663 di->di_printf("[r%d", (insn >> 16) & 0x0f); 664 665 di->di_printf("%s, ", (insn & (1 << 24)) ? "" : "]"); 666 667 if (!(insn & (1 << 23))) 668 di->di_printf("-"); 669 670 di->di_printf("#0x%03x", (insn & 0xff) << 2); 671 672 if (insn & (1 << 24)) 673 di->di_printf("]"); 674 675 if (insn & (1 << 21)) 676 di->di_printf("!"); 677 } 678 679 static u_int 680 disassemble_readword(u_int address) 681 { 682 return(*((u_int *)address)); 683 } 684 685 static void 686 disassemble_printaddr(u_int address) 687 { 688 printf("0x%08x", address); 689 } 690 691 static const disasm_interface_t disassemble_di = { 692 disassemble_readword, disassemble_printaddr, printf 693 }; 694 695 void 696 disassemble(u_int address) 697 { 698 699 (void)disasm(&disassemble_di, address, 0); 700 } 701 702 /* End of disassem.c */ 703
