| 1 | /* Print mips instructions for GDB, the GNU debugger, or for objdump. |
| 2 | Copyright 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 3 | 2000, 2001 |
| 4 | Free Software Foundation, Inc. |
| 5 | Contributed by Nobuyuki Hikichi(hikichi@sra.co.jp). |
| 6 | |
| 7 | This file is part of GDB, GAS, and the GNU binutils. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | #include "sysdep.h" |
| 24 | #include "dis-asm.h" |
| 25 | #include "opcode/mips.h" |
| 26 | #include "opintl.h" |
| 27 | |
| 28 | /* FIXME: These are needed to figure out if the code is mips16 or |
| 29 | not. The low bit of the address is often a good indicator. No |
| 30 | symbol table is available when this code runs out in an embedded |
| 31 | system as when it is used for disassembler support in a monitor. */ |
| 32 | |
| 33 | #if !defined(EMBEDDED_ENV) |
| 34 | #define SYMTAB_AVAILABLE 1 |
| 35 | #include "elf-bfd.h" |
| 36 | #include "elf/mips.h" |
| 37 | #endif |
| 38 | |
| 39 | /* Mips instructions are at maximum this many bytes long. */ |
| 40 | #define INSNLEN 4 |
| 41 | |
| 42 | static int _print_insn_mips |
| 43 | PARAMS ((bfd_vma, struct disassemble_info *, enum bfd_endian)); |
| 44 | static int print_insn_mips |
| 45 | PARAMS ((bfd_vma, unsigned long int, struct disassemble_info *)); |
| 46 | static void print_insn_arg |
| 47 | PARAMS ((const char *, unsigned long, bfd_vma, struct disassemble_info *)); |
| 48 | static void mips_isa_type |
| 49 | PARAMS ((int, int *, int *)); |
| 50 | static int print_insn_mips16 |
| 51 | PARAMS ((bfd_vma, struct disassemble_info *)); |
| 52 | static int is_newabi |
| 53 | PARAMS ((Elf_Internal_Ehdr *)); |
| 54 | static void print_mips16_insn_arg |
| 55 | PARAMS ((int, const struct mips_opcode *, int, boolean, int, bfd_vma, |
| 56 | struct disassemble_info *)); |
| 57 | \f |
| 58 | /* FIXME: These should be shared with gdb somehow. */ |
| 59 | |
| 60 | /* The mips16 register names. */ |
| 61 | static const char * const mips16_reg_names[] = { |
| 62 | "s0", "s1", "v0", "v1", "a0", "a1", "a2", "a3" |
| 63 | }; |
| 64 | |
| 65 | static const char * const mips32_reg_names[] = { |
| 66 | "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3", |
| 67 | "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", |
| 68 | "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", |
| 69 | "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra", |
| 70 | "sr", "lo", "hi", "bad", "cause", "pc", |
| 71 | "fv0", "$f1", "fv1", "$f3", "ft0", "$f5", "ft1", "$f7", |
| 72 | "ft2", "$f9", "ft3", "$f11", "fa0", "$f13", "fa1", "$f15", |
| 73 | "ft4", "f17", "ft5", "f19", "fs0", "f21", "fs1", "f23", |
| 74 | "fs2", "$f25", "fs3", "$f27", "fs4", "$f29", "fs5", "$f31", |
| 75 | "fsr", "fir", "fp", "inx", "rand", "tlblo", "ctxt", "tlbhi", |
| 76 | "epc", "prid" |
| 77 | }; |
| 78 | |
| 79 | static const char * const mips64_reg_names[] = { |
| 80 | "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3", |
| 81 | "a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3", |
| 82 | "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", |
| 83 | "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra", |
| 84 | "sr", "lo", "hi", "bad", "cause", "pc", |
| 85 | "fv0", "$f1", "fv1", "$f3", "ft0", "ft1", "ft2", "ft3", |
| 86 | "ft4", "ft5", "ft6", "ft7", "fa0", "fa1", "fa2", "fa3", |
| 87 | "fa4", "fa5", "fa6", "fa7", "ft8", "ft9", "ft10", "ft11", |
| 88 | "fs0", "fs1", "fs2", "fs3", "fs4", "fs5", "fs6", "fs7", |
| 89 | "fsr", "fir", "fp", "inx", "rand", "tlblo", "ctxt", "tlbhi", |
| 90 | "epc", "prid" |
| 91 | }; |
| 92 | |
| 93 | /* Scalar register names. _print_insn_mips() decides which register name |
| 94 | table to use. */ |
| 95 | static const char * const *reg_names = NULL; |
| 96 | \f |
| 97 | /* Print insn arguments for 32/64-bit code. */ |
| 98 | |
| 99 | static void |
| 100 | print_insn_arg (d, l, pc, info) |
| 101 | const char *d; |
| 102 | register unsigned long int l; |
| 103 | bfd_vma pc; |
| 104 | struct disassemble_info *info; |
| 105 | { |
| 106 | int delta; |
| 107 | |
| 108 | switch (*d) |
| 109 | { |
| 110 | case ',': |
| 111 | case '(': |
| 112 | case ')': |
| 113 | (*info->fprintf_func) (info->stream, "%c", *d); |
| 114 | break; |
| 115 | |
| 116 | case 's': |
| 117 | case 'b': |
| 118 | case 'r': |
| 119 | case 'v': |
| 120 | (*info->fprintf_func) (info->stream, "%s", |
| 121 | reg_names[(l >> OP_SH_RS) & OP_MASK_RS]); |
| 122 | break; |
| 123 | |
| 124 | case 't': |
| 125 | case 'w': |
| 126 | (*info->fprintf_func) (info->stream, "%s", |
| 127 | reg_names[(l >> OP_SH_RT) & OP_MASK_RT]); |
| 128 | break; |
| 129 | |
| 130 | case 'i': |
| 131 | case 'u': |
| 132 | (*info->fprintf_func) (info->stream, "0x%x", |
| 133 | (l >> OP_SH_IMMEDIATE) & OP_MASK_IMMEDIATE); |
| 134 | break; |
| 135 | |
| 136 | case 'j': /* Same as i, but sign-extended. */ |
| 137 | case 'o': |
| 138 | delta = (l >> OP_SH_DELTA) & OP_MASK_DELTA; |
| 139 | if (delta & 0x8000) |
| 140 | delta |= ~0xffff; |
| 141 | (*info->fprintf_func) (info->stream, "%d", |
| 142 | delta); |
| 143 | break; |
| 144 | |
| 145 | case 'h': |
| 146 | (*info->fprintf_func) (info->stream, "0x%x", |
| 147 | (unsigned int) ((l >> OP_SH_PREFX) |
| 148 | & OP_MASK_PREFX)); |
| 149 | break; |
| 150 | |
| 151 | case 'k': |
| 152 | (*info->fprintf_func) (info->stream, "0x%x", |
| 153 | (unsigned int) ((l >> OP_SH_CACHE) |
| 154 | & OP_MASK_CACHE)); |
| 155 | break; |
| 156 | |
| 157 | case 'a': |
| 158 | (*info->print_address_func) |
| 159 | ((((pc + 4) & ~(bfd_vma) 0x0fffffff) |
| 160 | | (((l >> OP_SH_TARGET) & OP_MASK_TARGET) << 2)), |
| 161 | info); |
| 162 | break; |
| 163 | |
| 164 | case 'p': |
| 165 | /* Sign extend the displacement. */ |
| 166 | delta = (l >> OP_SH_DELTA) & OP_MASK_DELTA; |
| 167 | if (delta & 0x8000) |
| 168 | delta |= ~0xffff; |
| 169 | (*info->print_address_func) |
| 170 | ((delta << 2) + pc + INSNLEN, |
| 171 | info); |
| 172 | break; |
| 173 | |
| 174 | case 'd': |
| 175 | (*info->fprintf_func) (info->stream, "%s", |
| 176 | reg_names[(l >> OP_SH_RD) & OP_MASK_RD]); |
| 177 | break; |
| 178 | |
| 179 | case 'U': |
| 180 | { |
| 181 | /* First check for both rd and rt being equal. */ |
| 182 | unsigned int reg = (l >> OP_SH_RD) & OP_MASK_RD; |
| 183 | if (reg == ((l >> OP_SH_RT) & OP_MASK_RT)) |
| 184 | (*info->fprintf_func) (info->stream, "%s", |
| 185 | reg_names[reg]); |
| 186 | else |
| 187 | { |
| 188 | /* If one is zero use the other. */ |
| 189 | if (reg == 0) |
| 190 | (*info->fprintf_func) (info->stream, "%s", |
| 191 | reg_names[(l >> OP_SH_RT) & OP_MASK_RT]); |
| 192 | else if (((l >> OP_SH_RT) & OP_MASK_RT) == 0) |
| 193 | (*info->fprintf_func) (info->stream, "%s", |
| 194 | reg_names[reg]); |
| 195 | else /* Bogus, result depends on processor. */ |
| 196 | (*info->fprintf_func) (info->stream, "%s or %s", |
| 197 | reg_names[reg], |
| 198 | reg_names[(l >> OP_SH_RT) & OP_MASK_RT]); |
| 199 | } |
| 200 | } |
| 201 | break; |
| 202 | |
| 203 | case 'z': |
| 204 | (*info->fprintf_func) (info->stream, "%s", reg_names[0]); |
| 205 | break; |
| 206 | |
| 207 | case '<': |
| 208 | (*info->fprintf_func) (info->stream, "0x%x", |
| 209 | (l >> OP_SH_SHAMT) & OP_MASK_SHAMT); |
| 210 | break; |
| 211 | |
| 212 | case 'c': |
| 213 | (*info->fprintf_func) (info->stream, "0x%x", |
| 214 | (l >> OP_SH_CODE) & OP_MASK_CODE); |
| 215 | break; |
| 216 | |
| 217 | case 'q': |
| 218 | (*info->fprintf_func) (info->stream, "0x%x", |
| 219 | (l >> OP_SH_CODE2) & OP_MASK_CODE2); |
| 220 | break; |
| 221 | |
| 222 | case 'C': |
| 223 | (*info->fprintf_func) (info->stream, "0x%x", |
| 224 | (l >> OP_SH_COPZ) & OP_MASK_COPZ); |
| 225 | break; |
| 226 | |
| 227 | case 'B': |
| 228 | (*info->fprintf_func) (info->stream, "0x%x", |
| 229 | (l >> OP_SH_CODE20) & OP_MASK_CODE20); |
| 230 | break; |
| 231 | |
| 232 | case 'J': |
| 233 | (*info->fprintf_func) (info->stream, "0x%x", |
| 234 | (l >> OP_SH_CODE19) & OP_MASK_CODE19); |
| 235 | break; |
| 236 | |
| 237 | case 'S': |
| 238 | case 'V': |
| 239 | (*info->fprintf_func) (info->stream, "$f%d", |
| 240 | (l >> OP_SH_FS) & OP_MASK_FS); |
| 241 | break; |
| 242 | |
| 243 | case 'T': |
| 244 | case 'W': |
| 245 | (*info->fprintf_func) (info->stream, "$f%d", |
| 246 | (l >> OP_SH_FT) & OP_MASK_FT); |
| 247 | break; |
| 248 | |
| 249 | case 'D': |
| 250 | (*info->fprintf_func) (info->stream, "$f%d", |
| 251 | (l >> OP_SH_FD) & OP_MASK_FD); |
| 252 | break; |
| 253 | |
| 254 | case 'R': |
| 255 | (*info->fprintf_func) (info->stream, "$f%d", |
| 256 | (l >> OP_SH_FR) & OP_MASK_FR); |
| 257 | break; |
| 258 | |
| 259 | case 'E': |
| 260 | (*info->fprintf_func) (info->stream, "$%d", |
| 261 | (l >> OP_SH_RT) & OP_MASK_RT); |
| 262 | break; |
| 263 | |
| 264 | case 'G': |
| 265 | (*info->fprintf_func) (info->stream, "$%d", |
| 266 | (l >> OP_SH_RD) & OP_MASK_RD); |
| 267 | break; |
| 268 | |
| 269 | case 'N': |
| 270 | (*info->fprintf_func) (info->stream, "$fcc%d", |
| 271 | (l >> OP_SH_BCC) & OP_MASK_BCC); |
| 272 | break; |
| 273 | |
| 274 | case 'M': |
| 275 | (*info->fprintf_func) (info->stream, "$fcc%d", |
| 276 | (l >> OP_SH_CCC) & OP_MASK_CCC); |
| 277 | break; |
| 278 | |
| 279 | case 'P': |
| 280 | (*info->fprintf_func) (info->stream, "%d", |
| 281 | (l >> OP_SH_PERFREG) & OP_MASK_PERFREG); |
| 282 | break; |
| 283 | |
| 284 | case 'H': |
| 285 | (*info->fprintf_func) (info->stream, "%d", |
| 286 | (l >> OP_SH_SEL) & OP_MASK_SEL); |
| 287 | break; |
| 288 | |
| 289 | default: |
| 290 | /* xgettext:c-format */ |
| 291 | (*info->fprintf_func) (info->stream, |
| 292 | _("# internal error, undefined modifier(%c)"), |
| 293 | *d); |
| 294 | break; |
| 295 | } |
| 296 | } |
| 297 | \f |
| 298 | /* Figure out the MIPS ISA and CPU based on the machine number. */ |
| 299 | |
| 300 | static void |
| 301 | mips_isa_type (mach, isa, cputype) |
| 302 | int mach; |
| 303 | int *isa; |
| 304 | int *cputype; |
| 305 | { |
| 306 | switch (mach) |
| 307 | { |
| 308 | case bfd_mach_mips3000: |
| 309 | *cputype = CPU_R3000; |
| 310 | *isa = ISA_MIPS1; |
| 311 | break; |
| 312 | case bfd_mach_mips3900: |
| 313 | *cputype = CPU_R3900; |
| 314 | *isa = ISA_MIPS1; |
| 315 | break; |
| 316 | case bfd_mach_mips4000: |
| 317 | *cputype = CPU_R4000; |
| 318 | *isa = ISA_MIPS3; |
| 319 | break; |
| 320 | case bfd_mach_mips4010: |
| 321 | *cputype = CPU_R4010; |
| 322 | *isa = ISA_MIPS2; |
| 323 | break; |
| 324 | case bfd_mach_mips4100: |
| 325 | *cputype = CPU_VR4100; |
| 326 | *isa = ISA_MIPS3; |
| 327 | break; |
| 328 | case bfd_mach_mips4111: |
| 329 | *cputype = CPU_R4111; |
| 330 | *isa = ISA_MIPS3; |
| 331 | break; |
| 332 | case bfd_mach_mips4300: |
| 333 | *cputype = CPU_R4300; |
| 334 | *isa = ISA_MIPS3; |
| 335 | break; |
| 336 | case bfd_mach_mips4400: |
| 337 | *cputype = CPU_R4400; |
| 338 | *isa = ISA_MIPS3; |
| 339 | break; |
| 340 | case bfd_mach_mips4600: |
| 341 | *cputype = CPU_R4600; |
| 342 | *isa = ISA_MIPS3; |
| 343 | break; |
| 344 | case bfd_mach_mips4650: |
| 345 | *cputype = CPU_R4650; |
| 346 | *isa = ISA_MIPS3; |
| 347 | break; |
| 348 | case bfd_mach_mips5000: |
| 349 | *cputype = CPU_R5000; |
| 350 | *isa = ISA_MIPS4; |
| 351 | break; |
| 352 | case bfd_mach_mips6000: |
| 353 | *cputype = CPU_R6000; |
| 354 | *isa = ISA_MIPS2; |
| 355 | break; |
| 356 | case bfd_mach_mips8000: |
| 357 | *cputype = CPU_R8000; |
| 358 | *isa = ISA_MIPS4; |
| 359 | break; |
| 360 | case bfd_mach_mips10000: |
| 361 | *cputype = CPU_R10000; |
| 362 | *isa = ISA_MIPS4; |
| 363 | break; |
| 364 | case bfd_mach_mips12000: |
| 365 | *cputype = CPU_R12000; |
| 366 | *isa = ISA_MIPS4; |
| 367 | break; |
| 368 | case bfd_mach_mips16: |
| 369 | *cputype = CPU_MIPS16; |
| 370 | *isa = ISA_MIPS3; |
| 371 | break; |
| 372 | case bfd_mach_mips5: |
| 373 | *cputype = CPU_MIPS5; |
| 374 | *isa = ISA_MIPS5; |
| 375 | break; |
| 376 | case bfd_mach_mips_sb1: |
| 377 | *cputype = CPU_SB1; |
| 378 | *isa = ISA_MIPS64; |
| 379 | break; |
| 380 | case bfd_mach_mipsisa32: |
| 381 | * cputype = CPU_MIPS32; |
| 382 | * isa = ISA_MIPS32; |
| 383 | break; |
| 384 | case bfd_mach_mipsisa64: |
| 385 | * cputype = CPU_MIPS64; |
| 386 | * isa = ISA_MIPS64; |
| 387 | break; |
| 388 | |
| 389 | default: |
| 390 | *cputype = CPU_R3000; |
| 391 | *isa = ISA_MIPS3; |
| 392 | break; |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | /* Check if the object uses NewABI conventions. */ |
| 397 | |
| 398 | static int |
| 399 | is_newabi (header) |
| 400 | Elf_Internal_Ehdr *header; |
| 401 | { |
| 402 | if ((header->e_flags |
| 403 | & (E_MIPS_ABI_EABI32 | E_MIPS_ABI_EABI64 | EF_MIPS_ABI2)) != 0 |
| 404 | || (header->e_ident[EI_CLASS] == ELFCLASS64 |
| 405 | && (header->e_flags & E_MIPS_ABI_O64) == 0)) |
| 406 | return 1; |
| 407 | |
| 408 | return 0; |
| 409 | } |
| 410 | \f |
| 411 | /* Print the mips instruction at address MEMADDR in debugged memory, |
| 412 | on using INFO. Returns length of the instruction, in bytes, which is |
| 413 | always INSNLEN. BIGENDIAN must be 1 if this is big-endian code, 0 if |
| 414 | this is little-endian code. */ |
| 415 | |
| 416 | static int |
| 417 | print_insn_mips (memaddr, word, info) |
| 418 | bfd_vma memaddr; |
| 419 | unsigned long int word; |
| 420 | struct disassemble_info *info; |
| 421 | { |
| 422 | register const struct mips_opcode *op; |
| 423 | int target_processor, mips_isa; |
| 424 | static boolean init = 0; |
| 425 | static const struct mips_opcode *mips_hash[OP_MASK_OP + 1]; |
| 426 | |
| 427 | /* Build a hash table to shorten the search time. */ |
| 428 | if (! init) |
| 429 | { |
| 430 | unsigned int i; |
| 431 | |
| 432 | for (i = 0; i <= OP_MASK_OP; i++) |
| 433 | { |
| 434 | for (op = mips_opcodes; op < &mips_opcodes[NUMOPCODES]; op++) |
| 435 | { |
| 436 | if (op->pinfo == INSN_MACRO) |
| 437 | continue; |
| 438 | if (i == ((op->match >> OP_SH_OP) & OP_MASK_OP)) |
| 439 | { |
| 440 | mips_hash[i] = op; |
| 441 | break; |
| 442 | } |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | init = 1; |
| 447 | } |
| 448 | |
| 449 | #if ! SYMTAB_AVAILABLE |
| 450 | /* This is running out on a target machine, not in a host tool. |
| 451 | FIXME: Where does mips_target_info come from? */ |
| 452 | target_processor = mips_target_info.processor; |
| 453 | mips_isa = mips_target_info.isa; |
| 454 | #else |
| 455 | mips_isa_type (info->mach, &mips_isa, &target_processor); |
| 456 | #endif |
| 457 | |
| 458 | info->bytes_per_chunk = INSNLEN; |
| 459 | info->display_endian = info->endian; |
| 460 | |
| 461 | op = mips_hash[(word >> OP_SH_OP) & OP_MASK_OP]; |
| 462 | if (op != NULL) |
| 463 | { |
| 464 | for (; op < &mips_opcodes[NUMOPCODES]; op++) |
| 465 | { |
| 466 | if (op->pinfo != INSN_MACRO && (word & op->mask) == op->match) |
| 467 | { |
| 468 | register const char *d; |
| 469 | |
| 470 | if (! OPCODE_IS_MEMBER (op, mips_isa, target_processor)) |
| 471 | continue; |
| 472 | |
| 473 | (*info->fprintf_func) (info->stream, "%s", op->name); |
| 474 | |
| 475 | d = op->args; |
| 476 | if (d != NULL && *d != '\0') |
| 477 | { |
| 478 | (*info->fprintf_func) (info->stream, "\t"); |
| 479 | for (; *d != '\0'; d++) |
| 480 | print_insn_arg (d, word, memaddr, info); |
| 481 | } |
| 482 | |
| 483 | return INSNLEN; |
| 484 | } |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | /* Handle undefined instructions. */ |
| 489 | (*info->fprintf_func) (info->stream, "0x%x", word); |
| 490 | return INSNLEN; |
| 491 | } |
| 492 | \f |
| 493 | /* In an environment where we do not know the symbol type of the |
| 494 | instruction we are forced to assume that the low order bit of the |
| 495 | instructions' address may mark it as a mips16 instruction. If we |
| 496 | are single stepping, or the pc is within the disassembled function, |
| 497 | this works. Otherwise, we need a clue. Sometimes. */ |
| 498 | |
| 499 | static int |
| 500 | _print_insn_mips (memaddr, info, endianness) |
| 501 | bfd_vma memaddr; |
| 502 | struct disassemble_info *info; |
| 503 | enum bfd_endian endianness; |
| 504 | { |
| 505 | bfd_byte buffer[INSNLEN]; |
| 506 | int status; |
| 507 | |
| 508 | #if 1 |
| 509 | /* FIXME: If odd address, this is CLEARLY a mips 16 instruction. */ |
| 510 | /* Only a few tools will work this way. */ |
| 511 | if (memaddr & 0x01) |
| 512 | return print_insn_mips16 (memaddr, info); |
| 513 | #endif |
| 514 | |
| 515 | #if SYMTAB_AVAILABLE |
| 516 | if (info->mach == 16 |
| 517 | || (info->flavour == bfd_target_elf_flavour |
| 518 | && info->symbols != NULL |
| 519 | && ((*(elf_symbol_type **) info->symbols)->internal_elf_sym.st_other |
| 520 | == STO_MIPS16))) |
| 521 | return print_insn_mips16 (memaddr, info); |
| 522 | #endif |
| 523 | |
| 524 | /* Use mips64_reg_names for new ABI. */ |
| 525 | reg_names = mips32_reg_names; |
| 526 | |
| 527 | if (info->flavour == bfd_target_elf_flavour && info->symbols != NULL) |
| 528 | { |
| 529 | Elf_Internal_Ehdr *header; |
| 530 | |
| 531 | header = elf_elfheader (bfd_asymbol_bfd (*(info->symbols))); |
| 532 | if (is_newabi (header)) |
| 533 | reg_names = mips64_reg_names; |
| 534 | } |
| 535 | |
| 536 | status = (*info->read_memory_func) (memaddr, buffer, INSNLEN, info); |
| 537 | if (status == 0) |
| 538 | { |
| 539 | unsigned long insn; |
| 540 | |
| 541 | if (endianness == BFD_ENDIAN_BIG) |
| 542 | insn = (unsigned long) bfd_getb32 (buffer); |
| 543 | else |
| 544 | insn = (unsigned long) bfd_getl32 (buffer); |
| 545 | |
| 546 | return print_insn_mips (memaddr, insn, info); |
| 547 | } |
| 548 | else |
| 549 | { |
| 550 | (*info->memory_error_func) (status, memaddr, info); |
| 551 | return -1; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | int |
| 556 | print_insn_big_mips (memaddr, info) |
| 557 | bfd_vma memaddr; |
| 558 | struct disassemble_info *info; |
| 559 | { |
| 560 | return _print_insn_mips (memaddr, info, BFD_ENDIAN_BIG); |
| 561 | } |
| 562 | |
| 563 | int |
| 564 | print_insn_little_mips (memaddr, info) |
| 565 | bfd_vma memaddr; |
| 566 | struct disassemble_info *info; |
| 567 | { |
| 568 | return _print_insn_mips (memaddr, info, BFD_ENDIAN_LITTLE); |
| 569 | } |
| 570 | \f |
| 571 | /* Disassemble mips16 instructions. */ |
| 572 | |
| 573 | static int |
| 574 | print_insn_mips16 (memaddr, info) |
| 575 | bfd_vma memaddr; |
| 576 | struct disassemble_info *info; |
| 577 | { |
| 578 | int status; |
| 579 | bfd_byte buffer[2]; |
| 580 | int length; |
| 581 | int insn; |
| 582 | boolean use_extend; |
| 583 | int extend = 0; |
| 584 | const struct mips_opcode *op, *opend; |
| 585 | |
| 586 | info->bytes_per_chunk = 2; |
| 587 | info->display_endian = info->endian; |
| 588 | info->insn_info_valid = 1; |
| 589 | info->branch_delay_insns = 0; |
| 590 | info->data_size = 0; |
| 591 | info->insn_type = dis_nonbranch; |
| 592 | info->target = 0; |
| 593 | info->target2 = 0; |
| 594 | |
| 595 | status = (*info->read_memory_func) (memaddr, buffer, 2, info); |
| 596 | if (status != 0) |
| 597 | { |
| 598 | (*info->memory_error_func) (status, memaddr, info); |
| 599 | return -1; |
| 600 | } |
| 601 | |
| 602 | length = 2; |
| 603 | |
| 604 | if (info->endian == BFD_ENDIAN_BIG) |
| 605 | insn = bfd_getb16 (buffer); |
| 606 | else |
| 607 | insn = bfd_getl16 (buffer); |
| 608 | |
| 609 | /* Handle the extend opcode specially. */ |
| 610 | use_extend = false; |
| 611 | if ((insn & 0xf800) == 0xf000) |
| 612 | { |
| 613 | use_extend = true; |
| 614 | extend = insn & 0x7ff; |
| 615 | |
| 616 | memaddr += 2; |
| 617 | |
| 618 | status = (*info->read_memory_func) (memaddr, buffer, 2, info); |
| 619 | if (status != 0) |
| 620 | { |
| 621 | (*info->fprintf_func) (info->stream, "extend 0x%x", |
| 622 | (unsigned int) extend); |
| 623 | (*info->memory_error_func) (status, memaddr, info); |
| 624 | return -1; |
| 625 | } |
| 626 | |
| 627 | if (info->endian == BFD_ENDIAN_BIG) |
| 628 | insn = bfd_getb16 (buffer); |
| 629 | else |
| 630 | insn = bfd_getl16 (buffer); |
| 631 | |
| 632 | /* Check for an extend opcode followed by an extend opcode. */ |
| 633 | if ((insn & 0xf800) == 0xf000) |
| 634 | { |
| 635 | (*info->fprintf_func) (info->stream, "extend 0x%x", |
| 636 | (unsigned int) extend); |
| 637 | info->insn_type = dis_noninsn; |
| 638 | return length; |
| 639 | } |
| 640 | |
| 641 | length += 2; |
| 642 | } |
| 643 | |
| 644 | /* FIXME: Should probably use a hash table on the major opcode here. */ |
| 645 | |
| 646 | opend = mips16_opcodes + bfd_mips16_num_opcodes; |
| 647 | for (op = mips16_opcodes; op < opend; op++) |
| 648 | { |
| 649 | if (op->pinfo != INSN_MACRO && (insn & op->mask) == op->match) |
| 650 | { |
| 651 | const char *s; |
| 652 | |
| 653 | if (strchr (op->args, 'a') != NULL) |
| 654 | { |
| 655 | if (use_extend) |
| 656 | { |
| 657 | (*info->fprintf_func) (info->stream, "extend 0x%x", |
| 658 | (unsigned int) extend); |
| 659 | info->insn_type = dis_noninsn; |
| 660 | return length - 2; |
| 661 | } |
| 662 | |
| 663 | use_extend = false; |
| 664 | |
| 665 | memaddr += 2; |
| 666 | |
| 667 | status = (*info->read_memory_func) (memaddr, buffer, 2, |
| 668 | info); |
| 669 | if (status == 0) |
| 670 | { |
| 671 | use_extend = true; |
| 672 | if (info->endian == BFD_ENDIAN_BIG) |
| 673 | extend = bfd_getb16 (buffer); |
| 674 | else |
| 675 | extend = bfd_getl16 (buffer); |
| 676 | length += 2; |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | (*info->fprintf_func) (info->stream, "%s", op->name); |
| 681 | if (op->args[0] != '\0') |
| 682 | (*info->fprintf_func) (info->stream, "\t"); |
| 683 | |
| 684 | for (s = op->args; *s != '\0'; s++) |
| 685 | { |
| 686 | if (*s == ',' |
| 687 | && s[1] == 'w' |
| 688 | && (((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX) |
| 689 | == ((insn >> MIPS16OP_SH_RY) & MIPS16OP_MASK_RY))) |
| 690 | { |
| 691 | /* Skip the register and the comma. */ |
| 692 | ++s; |
| 693 | continue; |
| 694 | } |
| 695 | if (*s == ',' |
| 696 | && s[1] == 'v' |
| 697 | && (((insn >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ) |
| 698 | == ((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX))) |
| 699 | { |
| 700 | /* Skip the register and the comma. */ |
| 701 | ++s; |
| 702 | continue; |
| 703 | } |
| 704 | print_mips16_insn_arg (*s, op, insn, use_extend, extend, memaddr, |
| 705 | info); |
| 706 | } |
| 707 | |
| 708 | if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0) |
| 709 | { |
| 710 | info->branch_delay_insns = 1; |
| 711 | if (info->insn_type != dis_jsr) |
| 712 | info->insn_type = dis_branch; |
| 713 | } |
| 714 | |
| 715 | return length; |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | if (use_extend) |
| 720 | (*info->fprintf_func) (info->stream, "0x%x", extend | 0xf000); |
| 721 | (*info->fprintf_func) (info->stream, "0x%x", insn); |
| 722 | info->insn_type = dis_noninsn; |
| 723 | |
| 724 | return length; |
| 725 | } |
| 726 | |
| 727 | /* Disassemble an operand for a mips16 instruction. */ |
| 728 | |
| 729 | static void |
| 730 | print_mips16_insn_arg (type, op, l, use_extend, extend, memaddr, info) |
| 731 | char type; |
| 732 | const struct mips_opcode *op; |
| 733 | int l; |
| 734 | boolean use_extend; |
| 735 | int extend; |
| 736 | bfd_vma memaddr; |
| 737 | struct disassemble_info *info; |
| 738 | { |
| 739 | switch (type) |
| 740 | { |
| 741 | case ',': |
| 742 | case '(': |
| 743 | case ')': |
| 744 | (*info->fprintf_func) (info->stream, "%c", type); |
| 745 | break; |
| 746 | |
| 747 | case 'y': |
| 748 | case 'w': |
| 749 | (*info->fprintf_func) (info->stream, "%s", |
| 750 | mips16_reg_names[((l >> MIPS16OP_SH_RY) |
| 751 | & MIPS16OP_MASK_RY)]); |
| 752 | break; |
| 753 | |
| 754 | case 'x': |
| 755 | case 'v': |
| 756 | (*info->fprintf_func) (info->stream, "%s", |
| 757 | mips16_reg_names[((l >> MIPS16OP_SH_RX) |
| 758 | & MIPS16OP_MASK_RX)]); |
| 759 | break; |
| 760 | |
| 761 | case 'z': |
| 762 | (*info->fprintf_func) (info->stream, "%s", |
| 763 | mips16_reg_names[((l >> MIPS16OP_SH_RZ) |
| 764 | & MIPS16OP_MASK_RZ)]); |
| 765 | break; |
| 766 | |
| 767 | case 'Z': |
| 768 | (*info->fprintf_func) (info->stream, "%s", |
| 769 | mips16_reg_names[((l >> MIPS16OP_SH_MOVE32Z) |
| 770 | & MIPS16OP_MASK_MOVE32Z)]); |
| 771 | break; |
| 772 | |
| 773 | case '0': |
| 774 | (*info->fprintf_func) (info->stream, "%s", mips32_reg_names[0]); |
| 775 | break; |
| 776 | |
| 777 | case 'S': |
| 778 | (*info->fprintf_func) (info->stream, "%s", mips32_reg_names[29]); |
| 779 | break; |
| 780 | |
| 781 | case 'P': |
| 782 | (*info->fprintf_func) (info->stream, "$pc"); |
| 783 | break; |
| 784 | |
| 785 | case 'R': |
| 786 | (*info->fprintf_func) (info->stream, "%s", mips32_reg_names[31]); |
| 787 | break; |
| 788 | |
| 789 | case 'X': |
| 790 | (*info->fprintf_func) (info->stream, "%s", |
| 791 | mips32_reg_names[((l >> MIPS16OP_SH_REGR32) |
| 792 | & MIPS16OP_MASK_REGR32)]); |
| 793 | break; |
| 794 | |
| 795 | case 'Y': |
| 796 | (*info->fprintf_func) (info->stream, "%s", |
| 797 | mips32_reg_names[MIPS16OP_EXTRACT_REG32R (l)]); |
| 798 | break; |
| 799 | |
| 800 | case '<': |
| 801 | case '>': |
| 802 | case '[': |
| 803 | case ']': |
| 804 | case '4': |
| 805 | case '5': |
| 806 | case 'H': |
| 807 | case 'W': |
| 808 | case 'D': |
| 809 | case 'j': |
| 810 | case '6': |
| 811 | case '8': |
| 812 | case 'V': |
| 813 | case 'C': |
| 814 | case 'U': |
| 815 | case 'k': |
| 816 | case 'K': |
| 817 | case 'p': |
| 818 | case 'q': |
| 819 | case 'A': |
| 820 | case 'B': |
| 821 | case 'E': |
| 822 | { |
| 823 | int immed, nbits, shift, signedp, extbits, pcrel, extu, branch; |
| 824 | |
| 825 | shift = 0; |
| 826 | signedp = 0; |
| 827 | extbits = 16; |
| 828 | pcrel = 0; |
| 829 | extu = 0; |
| 830 | branch = 0; |
| 831 | switch (type) |
| 832 | { |
| 833 | case '<': |
| 834 | nbits = 3; |
| 835 | immed = (l >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ; |
| 836 | extbits = 5; |
| 837 | extu = 1; |
| 838 | break; |
| 839 | case '>': |
| 840 | nbits = 3; |
| 841 | immed = (l >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX; |
| 842 | extbits = 5; |
| 843 | extu = 1; |
| 844 | break; |
| 845 | case '[': |
| 846 | nbits = 3; |
| 847 | immed = (l >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ; |
| 848 | extbits = 6; |
| 849 | extu = 1; |
| 850 | break; |
| 851 | case ']': |
| 852 | nbits = 3; |
| 853 | immed = (l >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX; |
| 854 | extbits = 6; |
| 855 | extu = 1; |
| 856 | break; |
| 857 | case '4': |
| 858 | nbits = 4; |
| 859 | immed = (l >> MIPS16OP_SH_IMM4) & MIPS16OP_MASK_IMM4; |
| 860 | signedp = 1; |
| 861 | extbits = 15; |
| 862 | break; |
| 863 | case '5': |
| 864 | nbits = 5; |
| 865 | immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5; |
| 866 | info->insn_type = dis_dref; |
| 867 | info->data_size = 1; |
| 868 | break; |
| 869 | case 'H': |
| 870 | nbits = 5; |
| 871 | shift = 1; |
| 872 | immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5; |
| 873 | info->insn_type = dis_dref; |
| 874 | info->data_size = 2; |
| 875 | break; |
| 876 | case 'W': |
| 877 | nbits = 5; |
| 878 | shift = 2; |
| 879 | immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5; |
| 880 | if ((op->pinfo & MIPS16_INSN_READ_PC) == 0 |
| 881 | && (op->pinfo & MIPS16_INSN_READ_SP) == 0) |
| 882 | { |
| 883 | info->insn_type = dis_dref; |
| 884 | info->data_size = 4; |
| 885 | } |
| 886 | break; |
| 887 | case 'D': |
| 888 | nbits = 5; |
| 889 | shift = 3; |
| 890 | immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5; |
| 891 | info->insn_type = dis_dref; |
| 892 | info->data_size = 8; |
| 893 | break; |
| 894 | case 'j': |
| 895 | nbits = 5; |
| 896 | immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5; |
| 897 | signedp = 1; |
| 898 | break; |
| 899 | case '6': |
| 900 | nbits = 6; |
| 901 | immed = (l >> MIPS16OP_SH_IMM6) & MIPS16OP_MASK_IMM6; |
| 902 | break; |
| 903 | case '8': |
| 904 | nbits = 8; |
| 905 | immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8; |
| 906 | break; |
| 907 | case 'V': |
| 908 | nbits = 8; |
| 909 | shift = 2; |
| 910 | immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8; |
| 911 | /* FIXME: This might be lw, or it might be addiu to $sp or |
| 912 | $pc. We assume it's load. */ |
| 913 | info->insn_type = dis_dref; |
| 914 | info->data_size = 4; |
| 915 | break; |
| 916 | case 'C': |
| 917 | nbits = 8; |
| 918 | shift = 3; |
| 919 | immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8; |
| 920 | info->insn_type = dis_dref; |
| 921 | info->data_size = 8; |
| 922 | break; |
| 923 | case 'U': |
| 924 | nbits = 8; |
| 925 | immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8; |
| 926 | extu = 1; |
| 927 | break; |
| 928 | case 'k': |
| 929 | nbits = 8; |
| 930 | immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8; |
| 931 | signedp = 1; |
| 932 | break; |
| 933 | case 'K': |
| 934 | nbits = 8; |
| 935 | shift = 3; |
| 936 | immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8; |
| 937 | signedp = 1; |
| 938 | break; |
| 939 | case 'p': |
| 940 | nbits = 8; |
| 941 | immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8; |
| 942 | signedp = 1; |
| 943 | pcrel = 1; |
| 944 | branch = 1; |
| 945 | info->insn_type = dis_condbranch; |
| 946 | break; |
| 947 | case 'q': |
| 948 | nbits = 11; |
| 949 | immed = (l >> MIPS16OP_SH_IMM11) & MIPS16OP_MASK_IMM11; |
| 950 | signedp = 1; |
| 951 | pcrel = 1; |
| 952 | branch = 1; |
| 953 | info->insn_type = dis_branch; |
| 954 | break; |
| 955 | case 'A': |
| 956 | nbits = 8; |
| 957 | shift = 2; |
| 958 | immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8; |
| 959 | pcrel = 1; |
| 960 | /* FIXME: This can be lw or la. We assume it is lw. */ |
| 961 | info->insn_type = dis_dref; |
| 962 | info->data_size = 4; |
| 963 | break; |
| 964 | case 'B': |
| 965 | nbits = 5; |
| 966 | shift = 3; |
| 967 | immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5; |
| 968 | pcrel = 1; |
| 969 | info->insn_type = dis_dref; |
| 970 | info->data_size = 8; |
| 971 | break; |
| 972 | case 'E': |
| 973 | nbits = 5; |
| 974 | shift = 2; |
| 975 | immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5; |
| 976 | pcrel = 1; |
| 977 | break; |
| 978 | default: |
| 979 | abort (); |
| 980 | } |
| 981 | |
| 982 | if (! use_extend) |
| 983 | { |
| 984 | if (signedp && immed >= (1 << (nbits - 1))) |
| 985 | immed -= 1 << nbits; |
| 986 | immed <<= shift; |
| 987 | if ((type == '<' || type == '>' || type == '[' || type == ']') |
| 988 | && immed == 0) |
| 989 | immed = 8; |
| 990 | } |
| 991 | else |
| 992 | { |
| 993 | if (extbits == 16) |
| 994 | immed |= ((extend & 0x1f) << 11) | (extend & 0x7e0); |
| 995 | else if (extbits == 15) |
| 996 | immed |= ((extend & 0xf) << 11) | (extend & 0x7f0); |
| 997 | else |
| 998 | immed = ((extend >> 6) & 0x1f) | (extend & 0x20); |
| 999 | immed &= (1 << extbits) - 1; |
| 1000 | if (! extu && immed >= (1 << (extbits - 1))) |
| 1001 | immed -= 1 << extbits; |
| 1002 | } |
| 1003 | |
| 1004 | if (! pcrel) |
| 1005 | (*info->fprintf_func) (info->stream, "%d", immed); |
| 1006 | else |
| 1007 | { |
| 1008 | bfd_vma baseaddr; |
| 1009 | bfd_vma val; |
| 1010 | |
| 1011 | if (branch) |
| 1012 | { |
| 1013 | immed *= 2; |
| 1014 | baseaddr = memaddr + 2; |
| 1015 | } |
| 1016 | else if (use_extend) |
| 1017 | baseaddr = memaddr - 2; |
| 1018 | else |
| 1019 | { |
| 1020 | int status; |
| 1021 | bfd_byte buffer[2]; |
| 1022 | |
| 1023 | baseaddr = memaddr; |
| 1024 | |
| 1025 | /* If this instruction is in the delay slot of a jr |
| 1026 | instruction, the base address is the address of the |
| 1027 | jr instruction. If it is in the delay slot of jalr |
| 1028 | instruction, the base address is the address of the |
| 1029 | jalr instruction. This test is unreliable: we have |
| 1030 | no way of knowing whether the previous word is |
| 1031 | instruction or data. */ |
| 1032 | status = (*info->read_memory_func) (memaddr - 4, buffer, 2, |
| 1033 | info); |
| 1034 | if (status == 0 |
| 1035 | && (((info->endian == BFD_ENDIAN_BIG |
| 1036 | ? bfd_getb16 (buffer) |
| 1037 | : bfd_getl16 (buffer)) |
| 1038 | & 0xf800) == 0x1800)) |
| 1039 | baseaddr = memaddr - 4; |
| 1040 | else |
| 1041 | { |
| 1042 | status = (*info->read_memory_func) (memaddr - 2, buffer, |
| 1043 | 2, info); |
| 1044 | if (status == 0 |
| 1045 | && (((info->endian == BFD_ENDIAN_BIG |
| 1046 | ? bfd_getb16 (buffer) |
| 1047 | : bfd_getl16 (buffer)) |
| 1048 | & 0xf81f) == 0xe800)) |
| 1049 | baseaddr = memaddr - 2; |
| 1050 | } |
| 1051 | } |
| 1052 | val = (baseaddr & ~((1 << shift) - 1)) + immed; |
| 1053 | (*info->print_address_func) (val, info); |
| 1054 | info->target = val; |
| 1055 | } |
| 1056 | } |
| 1057 | break; |
| 1058 | |
| 1059 | case 'a': |
| 1060 | if (! use_extend) |
| 1061 | extend = 0; |
| 1062 | l = ((l & 0x1f) << 23) | ((l & 0x3e0) << 13) | (extend << 2); |
| 1063 | (*info->print_address_func) (((memaddr + 4) & 0xf0000000) | l, info); |
| 1064 | info->insn_type = dis_jsr; |
| 1065 | info->target = ((memaddr + 4) & 0xf0000000) | l; |
| 1066 | info->branch_delay_insns = 1; |
| 1067 | break; |
| 1068 | |
| 1069 | case 'l': |
| 1070 | case 'L': |
| 1071 | { |
| 1072 | int need_comma, amask, smask; |
| 1073 | |
| 1074 | need_comma = 0; |
| 1075 | |
| 1076 | l = (l >> MIPS16OP_SH_IMM6) & MIPS16OP_MASK_IMM6; |
| 1077 | |
| 1078 | amask = (l >> 3) & 7; |
| 1079 | |
| 1080 | if (amask > 0 && amask < 5) |
| 1081 | { |
| 1082 | (*info->fprintf_func) (info->stream, "%s", mips32_reg_names[4]); |
| 1083 | if (amask > 1) |
| 1084 | (*info->fprintf_func) (info->stream, "-%s", |
| 1085 | mips32_reg_names[amask + 3]); |
| 1086 | need_comma = 1; |
| 1087 | } |
| 1088 | |
| 1089 | smask = (l >> 1) & 3; |
| 1090 | if (smask == 3) |
| 1091 | { |
| 1092 | (*info->fprintf_func) (info->stream, "%s??", |
| 1093 | need_comma ? "," : ""); |
| 1094 | need_comma = 1; |
| 1095 | } |
| 1096 | else if (smask > 0) |
| 1097 | { |
| 1098 | (*info->fprintf_func) (info->stream, "%s%s", |
| 1099 | need_comma ? "," : "", |
| 1100 | mips32_reg_names[16]); |
| 1101 | if (smask > 1) |
| 1102 | (*info->fprintf_func) (info->stream, "-%s", |
| 1103 | mips32_reg_names[smask + 15]); |
| 1104 | need_comma = 1; |
| 1105 | } |
| 1106 | |
| 1107 | if (l & 1) |
| 1108 | { |
| 1109 | (*info->fprintf_func) (info->stream, "%s%s", |
| 1110 | need_comma ? "," : "", |
| 1111 | mips32_reg_names[31]); |
| 1112 | need_comma = 1; |
| 1113 | } |
| 1114 | |
| 1115 | if (amask == 5 || amask == 6) |
| 1116 | { |
| 1117 | (*info->fprintf_func) (info->stream, "%s$f0", |
| 1118 | need_comma ? "," : ""); |
| 1119 | if (amask == 6) |
| 1120 | (*info->fprintf_func) (info->stream, "-$f1"); |
| 1121 | } |
| 1122 | } |
| 1123 | break; |
| 1124 | |
| 1125 | default: |
| 1126 | /* xgettext:c-format */ |
| 1127 | (*info->fprintf_func) |
| 1128 | (info->stream, |
| 1129 | _("# internal disassembler error, unrecognised modifier (%c)"), |
| 1130 | type); |
| 1131 | abort (); |
| 1132 | } |
| 1133 | } |