| 1 | /* C-SKY disassembler. |
| 2 | Copyright (C) 1988-2019 Free Software Foundation, Inc. |
| 3 | Contributed by C-SKY Microsystems and Mentor Graphics. |
| 4 | |
| 5 | This file is part of the GNU opcodes library. |
| 6 | |
| 7 | This library is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | It is distributed in the hope that it will be useful, but WITHOUT |
| 13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| 15 | License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include "config.h" |
| 24 | #include <stdio.h> |
| 25 | #include "bfd_stdint.h" |
| 26 | #include "disassemble.h" |
| 27 | #include "elf-bfd.h" |
| 28 | #include "opcode/csky.h" |
| 29 | #include "libiberty.h" |
| 30 | #include "csky-opc.h" |
| 31 | #include "floatformat.h" |
| 32 | |
| 33 | #define CSKY_INST_TYPE unsigned long |
| 34 | #define HAS_SUB_OPERAND (unsigned int)0xffffffff |
| 35 | |
| 36 | enum sym_type |
| 37 | { |
| 38 | CUR_TEXT, |
| 39 | CUR_DATA |
| 40 | }; |
| 41 | |
| 42 | struct csky_dis_info |
| 43 | { |
| 44 | /* Mem to disassemble. */ |
| 45 | bfd_vma mem; |
| 46 | /* Disassemble info. */ |
| 47 | disassemble_info *info; |
| 48 | /* Opcode information. */ |
| 49 | struct csky_opcode_info const *opinfo; |
| 50 | /* The value of operand to show. */ |
| 51 | int value; |
| 52 | /* Whether to look up/print a symbol name. */ |
| 53 | int need_output_symbol; |
| 54 | } dis_info; |
| 55 | |
| 56 | |
| 57 | enum sym_type last_type; |
| 58 | int last_map_sym = 1; |
| 59 | bfd_vma last_map_addr = 0; |
| 60 | |
| 61 | /* Only for objdump tool. */ |
| 62 | #define INIT_MACH_FLAG 0xffffffff |
| 63 | #define BINARY_MACH_FLAG 0x0 |
| 64 | |
| 65 | static unsigned int mach_flag = INIT_MACH_FLAG; |
| 66 | |
| 67 | static void |
| 68 | print_insn_data (bfd_vma pc ATTRIBUTE_UNUSED, |
| 69 | struct disassemble_info *info, |
| 70 | long given) |
| 71 | { |
| 72 | switch (info->bytes_per_chunk) |
| 73 | { |
| 74 | case 1: |
| 75 | info->fprintf_func (info->stream, ".byte\t0x%02lx", given); |
| 76 | break; |
| 77 | case 2: |
| 78 | info->fprintf_func (info->stream, ".short\t0x%04lx", given); |
| 79 | break; |
| 80 | case 4: |
| 81 | info->fprintf_func (info->stream, ".long\t0x%08lx", given); |
| 82 | break; |
| 83 | default: |
| 84 | abort (); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | static int |
| 89 | get_sym_code_type (struct disassemble_info *info, |
| 90 | int n, |
| 91 | enum sym_type *sym_type) |
| 92 | { |
| 93 | const char *name; |
| 94 | name = bfd_asymbol_name (info->symtab[n]); |
| 95 | if (name[0] == '$' && (name[1] == 't' || name[1] == 'd') |
| 96 | && (name[2] == 0 || name[2] == '.')) |
| 97 | { |
| 98 | *sym_type = ((name[1] == 't') ? CUR_TEXT : CUR_DATA); |
| 99 | return TRUE; |
| 100 | } |
| 101 | return FALSE; |
| 102 | } |
| 103 | |
| 104 | static int |
| 105 | csky_get_operand_mask (struct operand const *oprnd) |
| 106 | { |
| 107 | int mask = 0; |
| 108 | if (oprnd->mask == HAS_SUB_OPERAND) |
| 109 | { |
| 110 | struct soperand *sop = (struct soperand *)oprnd; |
| 111 | mask |= csky_get_operand_mask (&sop->subs[0]); |
| 112 | mask |= csky_get_operand_mask (&sop->subs[1]); |
| 113 | return mask; |
| 114 | } |
| 115 | return oprnd->mask; |
| 116 | } |
| 117 | |
| 118 | static int |
| 119 | csky_get_mask (struct csky_opcode_info const *pinfo) |
| 120 | { |
| 121 | int i = 0; |
| 122 | int mask = 0; |
| 123 | /* List type. */ |
| 124 | if (pinfo->operand_num == -1) |
| 125 | mask |= csky_get_operand_mask (&pinfo->oprnd.oprnds[i]); |
| 126 | else |
| 127 | for (; i < pinfo->operand_num; i++) |
| 128 | mask |= csky_get_operand_mask (&pinfo->oprnd.oprnds[i]); |
| 129 | |
| 130 | mask = ~mask; |
| 131 | return mask; |
| 132 | } |
| 133 | |
| 134 | static unsigned int |
| 135 | csky_chars_to_number (unsigned char * buf, int n) |
| 136 | { |
| 137 | int i; |
| 138 | unsigned int val = 0; |
| 139 | |
| 140 | if (dis_info.info->endian == BFD_ENDIAN_BIG) |
| 141 | for (i = 0; i < n; i++) |
| 142 | val = val << 8 | buf[i]; |
| 143 | else |
| 144 | for (i = n - 1; i >= 0; i--) |
| 145 | val = val << 8 | buf[i]; |
| 146 | return val; |
| 147 | } |
| 148 | |
| 149 | static struct csky_opcode const *g_opcodeP; |
| 150 | |
| 151 | static struct csky_opcode const * |
| 152 | csky_find_inst_info (struct csky_opcode_info const **pinfo, |
| 153 | CSKY_INST_TYPE inst, int length) |
| 154 | { |
| 155 | int i; |
| 156 | unsigned int mask; |
| 157 | struct csky_opcode const *p; |
| 158 | |
| 159 | p = g_opcodeP; |
| 160 | while (p->mnemonic) |
| 161 | { |
| 162 | /* Get the opcode mask. */ |
| 163 | for (i = 0; i < OP_TABLE_NUM; i++) |
| 164 | if (length == 2) |
| 165 | { |
| 166 | mask = csky_get_mask (&p->op16[i]); |
| 167 | if (mask != 0 && (inst & mask) == p->op16[i].opcode) |
| 168 | { |
| 169 | *pinfo = &p->op16[i]; |
| 170 | g_opcodeP = p; |
| 171 | return p; |
| 172 | } |
| 173 | } |
| 174 | else if (length == 4) |
| 175 | { |
| 176 | mask = csky_get_mask (&p->op32[i]); |
| 177 | if (mask != 0 |
| 178 | && ((unsigned long)(inst & mask) |
| 179 | == (unsigned long)p->op32[i].opcode)) |
| 180 | { |
| 181 | *pinfo = &p->op32[i]; |
| 182 | g_opcodeP = p; |
| 183 | return p; |
| 184 | } |
| 185 | } |
| 186 | p++; |
| 187 | } |
| 188 | |
| 189 | return NULL; |
| 190 | } |
| 191 | |
| 192 | static bfd_boolean |
| 193 | is_extern_symbol (struct disassemble_info *info, int addr) |
| 194 | { |
| 195 | unsigned int rel_count = 0; |
| 196 | |
| 197 | if (info->section == NULL) |
| 198 | return 0; |
| 199 | if ((info->section->flags & SEC_RELOC) != 0) /* Fit .o file. */ |
| 200 | { |
| 201 | struct reloc_cache_entry *pt = info->section->relocation; |
| 202 | for (; rel_count < info->section->reloc_count; rel_count++, pt++) |
| 203 | if ((long unsigned int)addr == pt->address) |
| 204 | return TRUE; |
| 205 | return FALSE; |
| 206 | } |
| 207 | return FALSE; |
| 208 | } |
| 209 | |
| 210 | |
| 211 | /* Suppress printing of mapping symbols emitted by the assembler to mark |
| 212 | the beginning of code and data sequences. */ |
| 213 | |
| 214 | bfd_boolean |
| 215 | csky_symbol_is_valid (asymbol *sym, |
| 216 | struct disassemble_info *info ATTRIBUTE_UNUSED) |
| 217 | { |
| 218 | const char *name; |
| 219 | |
| 220 | if (sym == NULL) |
| 221 | return FALSE; |
| 222 | name = bfd_asymbol_name (sym); |
| 223 | return name && *name != '$'; |
| 224 | } |
| 225 | |
| 226 | disassembler_ftype |
| 227 | csky_get_disassembler (bfd *abfd) |
| 228 | { |
| 229 | if (abfd != NULL) |
| 230 | mach_flag = elf_elfheader (abfd)->e_flags; |
| 231 | return print_insn_csky; |
| 232 | } |
| 233 | |
| 234 | static int |
| 235 | csky_output_operand (char *str, struct operand const *oprnd, |
| 236 | CSKY_INST_TYPE inst, int reloc ATTRIBUTE_UNUSED) |
| 237 | { |
| 238 | int ret = 0;; |
| 239 | int bit = 0; |
| 240 | int result = 0; |
| 241 | bfd_vma value; |
| 242 | int mask = oprnd->mask; |
| 243 | int max = 0; |
| 244 | char buf[128]; |
| 245 | |
| 246 | /* Get operand value with mask. */ |
| 247 | value = inst & mask; |
| 248 | for (; mask; mask >>= 1, value >>=1) |
| 249 | if (mask & 0x1) |
| 250 | { |
| 251 | result |= ((value & 0x1) << bit); |
| 252 | max |= (1 << bit); |
| 253 | bit++; |
| 254 | } |
| 255 | value = result; |
| 256 | |
| 257 | /* Here is general instructions that have no reloc. */ |
| 258 | switch (oprnd->type) |
| 259 | { |
| 260 | case OPRND_TYPE_CTRLREG: |
| 261 | if (IS_CSKY_V1 (mach_flag)) |
| 262 | { |
| 263 | /* In V1 only cr0-cr12 have alias names. */ |
| 264 | if (value <= 12) |
| 265 | strcat (str, csky_ctrl_regs[value].name); |
| 266 | /* Others using crn(n > 12). */ |
| 267 | else if (value <= 30) |
| 268 | { |
| 269 | sprintf (buf, "cr%d", (int)value); |
| 270 | strcat (str, buf); |
| 271 | } |
| 272 | else |
| 273 | return -1; |
| 274 | } |
| 275 | else |
| 276 | { |
| 277 | int sel; |
| 278 | int crx; |
| 279 | sel = value >> 5; |
| 280 | crx = value & 0x1f; |
| 281 | sprintf (buf, "cr<%d, %d>", crx, sel); |
| 282 | strcat (str, buf); |
| 283 | } |
| 284 | break; |
| 285 | case OPRND_TYPE_DUMMY_REG: |
| 286 | mask = dis_info.opinfo->oprnd.oprnds[0].mask; |
| 287 | value = inst & mask; |
| 288 | for (; mask; mask >>= 1, value >>=1) |
| 289 | if (mask & 0x1) |
| 290 | { |
| 291 | result |= ((value & 0x1) << bit); |
| 292 | bit++; |
| 293 | } |
| 294 | value = result; |
| 295 | strcat (str, csky_general_reg[value]); |
| 296 | break; |
| 297 | case OPRND_TYPE_GREG0_7: |
| 298 | case OPRND_TYPE_GREG0_15: |
| 299 | case OPRND_TYPE_GREG16_31: |
| 300 | case OPRND_TYPE_REGnsplr: |
| 301 | case OPRND_TYPE_AREG: |
| 302 | if (IS_CSKY_V2 (mach_flag) && value == 14) |
| 303 | strcat (str, "sp"); |
| 304 | else |
| 305 | strcat (str, csky_general_reg[value]); |
| 306 | dis_info.value = value; |
| 307 | break; |
| 308 | case OPRND_TYPE_CPREG: |
| 309 | strcat (str, csky_cp_reg[value]); |
| 310 | break; |
| 311 | case OPRND_TYPE_FREG: |
| 312 | sprintf (buf, "fr%d", (int)value); |
| 313 | strcat (str, buf); |
| 314 | break; |
| 315 | case OPRND_TYPE_VREG: |
| 316 | sprintf (buf, "vr%d", (int)value); |
| 317 | strcat (str, buf); |
| 318 | break; |
| 319 | case OPRND_TYPE_CPCREG: |
| 320 | strcat (str, csky_cp_creg[value]); |
| 321 | break; |
| 322 | case OPRND_TYPE_CPIDX: |
| 323 | strcat (str, csky_cp_idx[value]); |
| 324 | break; |
| 325 | case OPRND_TYPE_IMM2b_JMPIX: |
| 326 | value = (value + 2) << 3; |
| 327 | sprintf (buf, "%d", (int)value); |
| 328 | strcat (str, buf); |
| 329 | break; |
| 330 | case OPRND_TYPE_IMM_LDST: |
| 331 | case OPRND_TYPE_IMM_FLDST: |
| 332 | value <<= oprnd->shift; |
| 333 | sprintf (buf, "0x%x", (unsigned int)value); |
| 334 | strcat (str, buf); |
| 335 | break; |
| 336 | case OPRND_TYPE_IMM7b_LS2: |
| 337 | case OPRND_TYPE_IMM8b_LS2: |
| 338 | sprintf (buf, "%d", (int)(value << 2)); |
| 339 | strcat (str, buf); |
| 340 | ret = 0; |
| 341 | break; |
| 342 | case OPRND_TYPE_IMM5b_BMASKI: |
| 343 | if ((value != 0) && (value > 31 || value < 8)) |
| 344 | { |
| 345 | ret = -1; |
| 346 | break; |
| 347 | } |
| 348 | sprintf (buf, "%d", (int)value); |
| 349 | strcat (str, buf); |
| 350 | ret = 0; |
| 351 | break; |
| 352 | case OPRND_TYPE_IMM5b_1_31: |
| 353 | if (value > 31 || value < 1) |
| 354 | { |
| 355 | ret = -1; |
| 356 | break; |
| 357 | } |
| 358 | sprintf (buf, "%d", (int)value); |
| 359 | strcat (str, buf); |
| 360 | ret = 0; |
| 361 | break; |
| 362 | case OPRND_TYPE_IMM5b_7_31: |
| 363 | if (value > 31 || value < 7) |
| 364 | { |
| 365 | ret = -1; |
| 366 | break; |
| 367 | } |
| 368 | sprintf (buf, "%d", (int)value); |
| 369 | strcat (str, buf); |
| 370 | ret = 0; |
| 371 | break; |
| 372 | case OPRND_TYPE_MSB2SIZE: |
| 373 | case OPRND_TYPE_LSB2SIZE: |
| 374 | { |
| 375 | static int size; |
| 376 | if (oprnd->type == OPRND_TYPE_MSB2SIZE) |
| 377 | size = value; |
| 378 | else |
| 379 | { |
| 380 | str[strlen (str) - 2] = '\0'; |
| 381 | sprintf (buf, "%d, %d", (int)(size + value), (int)value); |
| 382 | strcat (str, buf); |
| 383 | } |
| 384 | break; |
| 385 | } |
| 386 | case OPRND_TYPE_IMM1b: |
| 387 | case OPRND_TYPE_IMM2b: |
| 388 | case OPRND_TYPE_IMM4b: |
| 389 | case OPRND_TYPE_IMM5b: |
| 390 | case OPRND_TYPE_IMM7b: |
| 391 | case OPRND_TYPE_IMM8b: |
| 392 | case OPRND_TYPE_IMM12b: |
| 393 | case OPRND_TYPE_IMM15b: |
| 394 | case OPRND_TYPE_IMM16b: |
| 395 | case OPRND_TYPE_IMM16b_MOVIH: |
| 396 | case OPRND_TYPE_IMM16b_ORI: |
| 397 | sprintf (buf, "%d", (int)value); |
| 398 | strcat (str, buf); |
| 399 | ret = 0; |
| 400 | break; |
| 401 | case OPRND_TYPE_OFF8b: |
| 402 | case OPRND_TYPE_OFF16b: |
| 403 | { |
| 404 | unsigned char ibytes[4]; |
| 405 | int shift = oprnd->shift; |
| 406 | int status; |
| 407 | unsigned int mem_val; |
| 408 | |
| 409 | dis_info.info->stop_vma = 0; |
| 410 | |
| 411 | value = ((dis_info.mem + (value << shift) |
| 412 | + ((IS_CSKY_V1 (mach_flag)) ? 2 : 0)) |
| 413 | & 0xfffffffc); |
| 414 | status = dis_info.info->read_memory_func (value, ibytes, 4, |
| 415 | dis_info.info); |
| 416 | if (status != 0) |
| 417 | { |
| 418 | dis_info.info->memory_error_func (status, dis_info.mem, |
| 419 | dis_info.info); |
| 420 | return -1; |
| 421 | } |
| 422 | mem_val = csky_chars_to_number (ibytes, 4); |
| 423 | /* Remove [] around literal value to match ABI syntax. */ |
| 424 | sprintf (buf, "0x%X", mem_val); |
| 425 | strcat (str, buf); |
| 426 | /* For jmpi/jsri, we'll try to get a symbol for the target. */ |
| 427 | if (dis_info.info->print_address_func && mem_val != 0) |
| 428 | { |
| 429 | dis_info.value = mem_val; |
| 430 | dis_info.need_output_symbol = 1; |
| 431 | } |
| 432 | else |
| 433 | { |
| 434 | sprintf (buf, "\t// from address pool at 0x%x", |
| 435 | (unsigned int)value); |
| 436 | strcat (str, buf); |
| 437 | } |
| 438 | break; |
| 439 | } |
| 440 | case OPRND_TYPE_BLOOP_OFF4b: |
| 441 | case OPRND_TYPE_BLOOP_OFF12b: |
| 442 | case OPRND_TYPE_OFF11b: |
| 443 | case OPRND_TYPE_OFF16b_LSL1: |
| 444 | case OPRND_TYPE_IMM_OFF18b: |
| 445 | case OPRND_TYPE_OFF26b: |
| 446 | { |
| 447 | int shift = oprnd->shift; |
| 448 | if (value & ((max >> 1) + 1)) |
| 449 | value |= ~max; |
| 450 | if (is_extern_symbol (dis_info.info, dis_info.mem)) |
| 451 | value = 0; |
| 452 | else if (IS_CSKY_V1 (mach_flag)) |
| 453 | value = dis_info.mem + 2 + (value << shift); |
| 454 | else |
| 455 | value = dis_info.mem + (value << shift); |
| 456 | dis_info.need_output_symbol = 1; |
| 457 | dis_info.value= value; |
| 458 | sprintf (buf, "0x%x", (unsigned int)value); |
| 459 | strcat (str, buf); |
| 460 | break; |
| 461 | } |
| 462 | case OPRND_TYPE_CONSTANT: |
| 463 | case OPRND_TYPE_FCONSTANT: |
| 464 | { |
| 465 | int shift = oprnd->shift; |
| 466 | char ibytes[8]; |
| 467 | int status; |
| 468 | bfd_vma addr; |
| 469 | int nbytes; |
| 470 | |
| 471 | dis_info.info->stop_vma = 0; |
| 472 | value <<= shift; |
| 473 | |
| 474 | if (IS_CSKY_V1 (mach_flag)) |
| 475 | addr = (dis_info.mem + 2 + value) & 0xfffffffc; |
| 476 | else |
| 477 | addr = (dis_info.mem + value) & 0xfffffffc; |
| 478 | |
| 479 | if (oprnd->type == OPRND_TYPE_FCONSTANT |
| 480 | && dis_info.opinfo->opcode != CSKYV2_INST_FLRW) |
| 481 | nbytes = 8; |
| 482 | else |
| 483 | nbytes = 4; |
| 484 | |
| 485 | status = dis_info.info->read_memory_func (addr, (bfd_byte *)ibytes, |
| 486 | nbytes, dis_info.info); |
| 487 | if (status != 0) |
| 488 | /* Address out of bounds. -> lrw rx, [pc, 0ffset]. */ |
| 489 | sprintf (buf, "[pc, %d]\t// from address pool at %x", (int)value, |
| 490 | (unsigned int)addr); |
| 491 | else |
| 492 | { |
| 493 | dis_info.value = addr; |
| 494 | value = csky_chars_to_number ((unsigned char *)ibytes, 4); |
| 495 | } |
| 496 | |
| 497 | if (oprnd->type == OPRND_TYPE_FCONSTANT) |
| 498 | { |
| 499 | double f; |
| 500 | |
| 501 | if (dis_info.opinfo->opcode == CSKYV2_INST_FLRW) |
| 502 | /* flrws. */ |
| 503 | floatformat_to_double ((dis_info.info->endian == BFD_ENDIAN_BIG |
| 504 | ? &floatformat_ieee_single_big |
| 505 | : &floatformat_ieee_single_little), |
| 506 | ibytes, &f); |
| 507 | else |
| 508 | floatformat_to_double ((dis_info.info->endian == BFD_ENDIAN_BIG |
| 509 | ? &floatformat_ieee_double_big |
| 510 | : &floatformat_ieee_double_little), |
| 511 | ibytes, &f); |
| 512 | sprintf (buf, "%f", f); |
| 513 | } |
| 514 | else |
| 515 | { |
| 516 | dis_info.need_output_symbol = 1; |
| 517 | sprintf (buf, "0x%x", (unsigned int)value); |
| 518 | } |
| 519 | |
| 520 | strcat (str, buf); |
| 521 | break; |
| 522 | } |
| 523 | case OPRND_TYPE_ELRW_CONSTANT: |
| 524 | { |
| 525 | int shift = oprnd->shift; |
| 526 | char ibytes[4]; |
| 527 | int status; |
| 528 | bfd_vma addr; |
| 529 | dis_info.info->stop_vma = 0; |
| 530 | |
| 531 | value = 0x80 + ((~value) & 0x7f); |
| 532 | |
| 533 | value = value << shift; |
| 534 | addr = (dis_info.mem + value) & 0xfffffffc; |
| 535 | |
| 536 | status = dis_info.info->read_memory_func (addr, (bfd_byte *)ibytes, |
| 537 | 4, dis_info.info); |
| 538 | if (status != 0) |
| 539 | /* Address out of bounds. -> lrw rx, [pc, 0ffset]. */ |
| 540 | sprintf (buf, "[pc, %d]\t// from address pool at %x", (int) value, |
| 541 | (unsigned int)addr); |
| 542 | else |
| 543 | { |
| 544 | dis_info.value = addr; |
| 545 | value = csky_chars_to_number ((unsigned char *)ibytes, 4); |
| 546 | dis_info.need_output_symbol = 1; |
| 547 | sprintf (buf, "0x%x", (unsigned int)value); |
| 548 | } |
| 549 | |
| 550 | strcat (str, buf); |
| 551 | break; |
| 552 | } |
| 553 | case OPRND_TYPE_SFLOAT: |
| 554 | case OPRND_TYPE_DFLOAT: |
| 555 | { |
| 556 | /* This is for fmovis/fmovid, which have an internal 13-bit |
| 557 | encoding that they convert to single/double precision |
| 558 | (respectively). We'll convert the 13-bit encoding to an IEEE |
| 559 | double and then to host double format to print it. |
| 560 | Sign bit: bit 20. |
| 561 | 4-bit exponent: bits 19:16, biased by 11. |
| 562 | 8-bit mantissa: split between 24:21 and 7:4. */ |
| 563 | uint64_t imm4; |
| 564 | uint64_t imm8; |
| 565 | uint64_t dbnum; |
| 566 | unsigned char valbytes[8]; |
| 567 | double fvalue; |
| 568 | |
| 569 | imm4 = ((inst >> 16) & 0xf); |
| 570 | imm4 = (uint64_t)(1023 - (imm4 - 11)) << 52; |
| 571 | |
| 572 | imm8 = (uint64_t)((inst >> 4) & 0xf) << 44; |
| 573 | imm8 |= (uint64_t)((inst >> 21) & 0xf) << 48; |
| 574 | |
| 575 | dbnum = (uint64_t)((inst >> 20) & 1) << 63; |
| 576 | dbnum |= imm4 | imm8; |
| 577 | |
| 578 | /* Do this a byte at a time so we don't have to |
| 579 | worry about the host's endianness. */ |
| 580 | valbytes[0] = dbnum & 0xff; |
| 581 | valbytes[1] = (dbnum >> 8) & 0xff; |
| 582 | valbytes[2] = (dbnum >> 16) & 0xff; |
| 583 | valbytes[3] = (dbnum >> 24) & 0xff; |
| 584 | valbytes[4] = (dbnum >> 32) & 0xff; |
| 585 | valbytes[5] = (dbnum >> 40) & 0xff; |
| 586 | valbytes[6] = (dbnum >> 48) & 0xff; |
| 587 | valbytes[7] = (dbnum >> 56) & 0xff; |
| 588 | |
| 589 | floatformat_to_double (&floatformat_ieee_double_little, valbytes, |
| 590 | &fvalue); |
| 591 | |
| 592 | sprintf (buf, "%f", fvalue); |
| 593 | strcat (str, buf); |
| 594 | break; |
| 595 | } |
| 596 | case OPRND_TYPE_LABEL_WITH_BRACKET: |
| 597 | sprintf (buf, "[0x%x]", (unsigned int)value); |
| 598 | strcat (str, buf); |
| 599 | strcat (str, "\t// the offset is based on .data"); |
| 600 | break; |
| 601 | case OPRND_TYPE_OIMM3b: |
| 602 | case OPRND_TYPE_OIMM4b: |
| 603 | case OPRND_TYPE_OIMM5b: |
| 604 | case OPRND_TYPE_OIMM5b_IDLY: |
| 605 | case OPRND_TYPE_OIMM8b: |
| 606 | case OPRND_TYPE_OIMM12b: |
| 607 | case OPRND_TYPE_OIMM16b: |
| 608 | case OPRND_TYPE_OIMM18b: |
| 609 | value += 1; |
| 610 | sprintf (buf, "%d", (int)value); |
| 611 | strcat (str, buf); |
| 612 | break; |
| 613 | case OPRND_TYPE_OIMM5b_BMASKI: |
| 614 | if (value > 32 || value < 16) |
| 615 | { |
| 616 | ret = -1; |
| 617 | break; |
| 618 | } |
| 619 | sprintf (buf, "%d", (int)(value + 1)); |
| 620 | strcat (str, buf); |
| 621 | ret = 0; |
| 622 | break; |
| 623 | case OPRND_TYPE_FREGLIST_DASH: |
| 624 | if (IS_CSKY_V2 (mach_flag)) |
| 625 | { |
| 626 | int vrx = value & 0xf; |
| 627 | int vry = vrx + (value >> 4); |
| 628 | sprintf (buf, "fr%d-fr%d", vrx, vry); |
| 629 | strcat (str, buf); |
| 630 | } |
| 631 | break; |
| 632 | case OPRND_TYPE_REGLIST_DASH: |
| 633 | if (IS_CSKY_V1 (mach_flag)) |
| 634 | { |
| 635 | strcat (str, csky_general_reg[value]); |
| 636 | strcat (str, "-r15"); |
| 637 | } |
| 638 | else |
| 639 | { |
| 640 | strcat (str, csky_general_reg[value >> 5]); |
| 641 | strcat (str, "-"); |
| 642 | strcat (str, csky_general_reg[(value & 0x1f) + (value >> 5)]); |
| 643 | } |
| 644 | break; |
| 645 | case OPRND_TYPE_PSR_BITS_LIST: |
| 646 | { |
| 647 | struct psrbit const *bits; |
| 648 | int first_oprnd = TRUE; |
| 649 | int i = 0; |
| 650 | if (IS_CSKY_V1 (mach_flag)) |
| 651 | { |
| 652 | if (value == 0) |
| 653 | { |
| 654 | strcat (str, "af"); |
| 655 | break; |
| 656 | } |
| 657 | bits = cskyv1_psr_bits; |
| 658 | } |
| 659 | else |
| 660 | bits = cskyv2_psr_bits; |
| 661 | while (value != 0 && bits[i].name != NULL) |
| 662 | { |
| 663 | if (value & bits[i].value) |
| 664 | { |
| 665 | if (!first_oprnd) |
| 666 | strcat (str, ", "); |
| 667 | strcat (str, bits[i].name); |
| 668 | value &= ~bits[i].value; |
| 669 | first_oprnd = FALSE; |
| 670 | } |
| 671 | i++; |
| 672 | } |
| 673 | break; |
| 674 | } |
| 675 | case OPRND_TYPE_REGbsp: |
| 676 | if (IS_CSKY_V1 (mach_flag)) |
| 677 | strcat (str, "(sp)"); |
| 678 | else |
| 679 | strcat (str, "(sp)"); |
| 680 | break; |
| 681 | case OPRND_TYPE_REGsp: |
| 682 | if (IS_CSKY_V1 (mach_flag)) |
| 683 | strcat (str, "sp"); |
| 684 | else |
| 685 | strcat (str, "sp"); |
| 686 | break; |
| 687 | case OPRND_TYPE_REGnr4_r7: |
| 688 | case OPRND_TYPE_AREG_WITH_BRACKET: |
| 689 | if (IS_CSKY_V1 (mach_flag) && (value < 4 || value > 7)) |
| 690 | { |
| 691 | strcat (str, "("); |
| 692 | strcat (str, csky_general_reg[value]); |
| 693 | strcat (str, ")"); |
| 694 | } |
| 695 | else |
| 696 | { |
| 697 | strcat (str, "("); |
| 698 | strcat (str, csky_general_reg[value]); |
| 699 | strcat (str, ")"); |
| 700 | } |
| 701 | break; |
| 702 | case OPRND_TYPE_AREG_WITH_LSHIFT: |
| 703 | strcat (str, csky_general_reg[value >> 5]); |
| 704 | strcat (str, " << "); |
| 705 | if ((value & 0x1f) == 0x1) |
| 706 | strcat (str, "0"); |
| 707 | else if ((value & 0x1f) == 0x2) |
| 708 | strcat (str, "1"); |
| 709 | else if ((value & 0x1f) == 0x4) |
| 710 | strcat (str, "2"); |
| 711 | else if ((value & 0x1f) == 0x8) |
| 712 | strcat (str, "3"); |
| 713 | break; |
| 714 | case OPRND_TYPE_AREG_WITH_LSHIFT_FPU: |
| 715 | strcat (str, csky_general_reg[value >> 2]); |
| 716 | strcat (str, " << "); |
| 717 | if ((value & 0x3) == 0x0) |
| 718 | strcat (str, "0"); |
| 719 | else if ((value & 0x3) == 0x1) |
| 720 | strcat (str, "1"); |
| 721 | else if ((value & 0x3) == 0x2) |
| 722 | strcat (str, "2"); |
| 723 | else if ((value & 0x3) == 0x3) |
| 724 | strcat (str, "3"); |
| 725 | break; |
| 726 | case OPRND_TYPE_FREG_WITH_INDEX: |
| 727 | { |
| 728 | unsigned freg_val = value & 0xf; |
| 729 | unsigned index_val = (value >> 4) & 0xf; |
| 730 | sprintf (buf, "vr%d[%d]", freg_val, index_val); |
| 731 | strcat(str, buf); |
| 732 | break; |
| 733 | } |
| 734 | case OPRND_TYPE_REGr4_r7: |
| 735 | if (IS_CSKY_V1 (mach_flag)) |
| 736 | strcat (str, "r4-r7"); |
| 737 | break; |
| 738 | case OPRND_TYPE_CONST1: |
| 739 | strcat (str, "1"); |
| 740 | break; |
| 741 | case OPRND_TYPE_REG_r1a: |
| 742 | case OPRND_TYPE_REG_r1b: |
| 743 | strcat (str, "r1"); |
| 744 | break; |
| 745 | case OPRND_TYPE_REG_r28: |
| 746 | strcat (str, "r28"); |
| 747 | break; |
| 748 | case OPRND_TYPE_REGLIST_DASH_COMMA: |
| 749 | /* 16-bit reglist. */ |
| 750 | if (value & 0xf) |
| 751 | { |
| 752 | strcat (str, "r4"); |
| 753 | if ((value & 0xf) > 1) |
| 754 | { |
| 755 | strcat (str, "-"); |
| 756 | strcat (str, csky_general_reg[(value & 0xf) + 3]); |
| 757 | } |
| 758 | if (value & ~0xf) |
| 759 | strcat (str, ", "); |
| 760 | } |
| 761 | if (value & 0x10) |
| 762 | { |
| 763 | /* r15. */ |
| 764 | strcat (str, "r15"); |
| 765 | if (value & ~0x1f) |
| 766 | strcat (str, ", "); |
| 767 | } |
| 768 | if (dis_info.opinfo->oprnd.oprnds[0].mask != OPRND_MASK_0_4) |
| 769 | { |
| 770 | /* 32bits reglist. */ |
| 771 | value >>= 5; |
| 772 | if (value & 0x3) |
| 773 | { |
| 774 | strcat (str, "r16"); |
| 775 | if ((value & 0x7) > 1) |
| 776 | { |
| 777 | strcat (str, "-"); |
| 778 | strcat (str, csky_general_reg[(value & 0xf) + 15]); |
| 779 | } |
| 780 | if (value & ~0x7) |
| 781 | strcat (str, ", "); |
| 782 | } |
| 783 | if (value & 0x8) |
| 784 | /* r15. */ |
| 785 | strcat (str, "r28"); |
| 786 | } |
| 787 | break; |
| 788 | case OPRND_TYPE_UNCOND10b: |
| 789 | case OPRND_TYPE_UNCOND16b: |
| 790 | case OPRND_TYPE_COND10b: |
| 791 | case OPRND_TYPE_COND16b: |
| 792 | { |
| 793 | int shift = oprnd->shift; |
| 794 | |
| 795 | if (value & ((max >> 1) + 1)) |
| 796 | value |= ~max; |
| 797 | if (is_extern_symbol (dis_info.info, dis_info.mem)) |
| 798 | value = 0; |
| 799 | else |
| 800 | value = dis_info.mem + (value << shift); |
| 801 | sprintf (buf, "0x%x", (unsigned int)value); |
| 802 | strcat (str, buf); |
| 803 | dis_info.need_output_symbol = 1; |
| 804 | dis_info.value = value; |
| 805 | } |
| 806 | break; |
| 807 | |
| 808 | default: |
| 809 | ret = -1; |
| 810 | break; |
| 811 | } |
| 812 | return ret; |
| 813 | } |
| 814 | |
| 815 | static int |
| 816 | csky_print_operand (char *str, struct operand const *oprnd, |
| 817 | CSKY_INST_TYPE inst, int reloc) |
| 818 | { |
| 819 | int ret = -1; |
| 820 | char *lc = ""; |
| 821 | char *rc = ""; |
| 822 | if (oprnd->mask == HAS_SUB_OPERAND) |
| 823 | { |
| 824 | struct soperand *sop = (struct soperand *)oprnd; |
| 825 | if (oprnd->type == OPRND_TYPE_BRACKET) |
| 826 | { |
| 827 | lc = "("; |
| 828 | rc = ")"; |
| 829 | } |
| 830 | else if (oprnd->type == OPRND_TYPE_ABRACKET) |
| 831 | { |
| 832 | lc = "<"; |
| 833 | rc = ">"; |
| 834 | } |
| 835 | strcat (str, lc); |
| 836 | ret = csky_print_operand (str, &sop->subs[0], inst, reloc); |
| 837 | if (ret) |
| 838 | return ret; |
| 839 | strcat (str, ", "); |
| 840 | ret = csky_print_operand (str, &sop->subs[1], inst, reloc); |
| 841 | strcat (str, rc); |
| 842 | return ret; |
| 843 | } |
| 844 | return csky_output_operand (str, oprnd, inst, reloc); |
| 845 | } |
| 846 | |
| 847 | static int |
| 848 | csky_print_operands (char *str, struct csky_opcode_info const *pinfo, |
| 849 | struct disassemble_info *info, CSKY_INST_TYPE inst, |
| 850 | int reloc) |
| 851 | { |
| 852 | int i = 0; |
| 853 | int ret = 0; |
| 854 | if (pinfo->operand_num) |
| 855 | strcat (str, " \t"); |
| 856 | if (pinfo->operand_num == -1) |
| 857 | { |
| 858 | ret = csky_print_operand (str, &pinfo->oprnd.oprnds[i], inst, reloc); |
| 859 | if (ret) |
| 860 | return ret; |
| 861 | } |
| 862 | else |
| 863 | for (; i < pinfo->operand_num; i++) |
| 864 | { |
| 865 | if (i != 0) |
| 866 | strcat (str, ", "); |
| 867 | ret = csky_print_operand (str, &pinfo->oprnd.oprnds[i], inst, reloc); |
| 868 | if (ret) |
| 869 | return ret; |
| 870 | } |
| 871 | info->fprintf_func (info->stream, "%s", str); |
| 872 | if (dis_info.need_output_symbol) |
| 873 | { |
| 874 | info->fprintf_func (info->stream, "\t// "); |
| 875 | info->print_address_func (dis_info.value, dis_info.info); |
| 876 | } |
| 877 | return 0; |
| 878 | } |
| 879 | |
| 880 | static void |
| 881 | number_to_chars_littleendian (char *buf, CSKY_INST_TYPE val, int n) |
| 882 | { |
| 883 | if (n <= 0) |
| 884 | abort (); |
| 885 | while (n--) |
| 886 | { |
| 887 | *buf++ = val & 0xff; |
| 888 | val >>= 8; |
| 889 | } |
| 890 | } |
| 891 | |
| 892 | #define CSKY_READ_DATA() \ |
| 893 | { \ |
| 894 | status = info->read_memory_func (memaddr, buf, 2, info); \ |
| 895 | if (status) \ |
| 896 | { \ |
| 897 | info->memory_error_func (status, memaddr, info); \ |
| 898 | return -1; \ |
| 899 | } \ |
| 900 | if (info->endian == BFD_ENDIAN_BIG) \ |
| 901 | inst |= (buf[0] << 8) | buf[1]; \ |
| 902 | else if (info->endian == BFD_ENDIAN_LITTLE) \ |
| 903 | inst |= (buf[1] << 8) | buf[0]; \ |
| 904 | else \ |
| 905 | abort(); \ |
| 906 | info->bytes_per_chunk += 2; \ |
| 907 | memaddr += 2; \ |
| 908 | } |
| 909 | |
| 910 | int |
| 911 | print_insn_csky (bfd_vma memaddr, struct disassemble_info *info) |
| 912 | { |
| 913 | unsigned char buf[4]; |
| 914 | CSKY_INST_TYPE inst = 0; |
| 915 | int status; |
| 916 | char str[256]; |
| 917 | long given; |
| 918 | int is_data = FALSE; |
| 919 | void (*printer) (bfd_vma, struct disassemble_info *, long); |
| 920 | unsigned int size = 4; |
| 921 | |
| 922 | memset (str, 0, sizeof (str)); |
| 923 | info->bytes_per_chunk = 0; |
| 924 | info->bytes_per_chunk = 0; |
| 925 | dis_info.mem = memaddr; |
| 926 | dis_info.info = info; |
| 927 | dis_info.need_output_symbol = 0; |
| 928 | if (mach_flag != INIT_MACH_FLAG && mach_flag != BINARY_MACH_FLAG) |
| 929 | info->mach = mach_flag; |
| 930 | else if (mach_flag == INIT_MACH_FLAG) |
| 931 | mach_flag = info->mach; |
| 932 | |
| 933 | if (mach_flag == BINARY_MACH_FLAG && info->endian == BFD_ENDIAN_UNKNOWN) |
| 934 | info->endian = BFD_ENDIAN_LITTLE; |
| 935 | |
| 936 | /* First check the full symtab for a mapping symbol, even if there |
| 937 | are no usable non-mapping symbols for this address. */ |
| 938 | if (info->symtab_size != 0 |
| 939 | && bfd_asymbol_flavour (*info->symtab) == bfd_target_elf_flavour) |
| 940 | { |
| 941 | bfd_vma addr; |
| 942 | int n; |
| 943 | int last_sym = -1; |
| 944 | enum sym_type type = CUR_TEXT; |
| 945 | |
| 946 | if (memaddr <= last_map_addr) |
| 947 | last_map_sym = -1; |
| 948 | /* Start scanning at the start of the function, or wherever |
| 949 | we finished last time. */ |
| 950 | n = 0; |
| 951 | if (n < last_map_sym) |
| 952 | n = last_map_sym; |
| 953 | |
| 954 | /* Scan up to the location being disassembled. */ |
| 955 | for (; n < info->symtab_size; n++) |
| 956 | { |
| 957 | addr = bfd_asymbol_value (info->symtab[n]); |
| 958 | if (addr > memaddr) |
| 959 | break; |
| 960 | if ((info->section == NULL |
| 961 | || info->section == info->symtab[n]->section) |
| 962 | && get_sym_code_type (info, n, &type)) |
| 963 | last_sym = n; |
| 964 | } |
| 965 | last_map_sym = last_sym; |
| 966 | last_type = type; |
| 967 | is_data = (last_type == CUR_DATA); |
| 968 | if (is_data) |
| 969 | { |
| 970 | size = 4 - ( memaddr & 3); |
| 971 | for (n = last_sym + 1; n < info->symtab_size; n++) |
| 972 | { |
| 973 | addr = bfd_asymbol_value (info->symtab[n]); |
| 974 | if (addr > memaddr) |
| 975 | { |
| 976 | if (addr - memaddr < size) |
| 977 | size = addr - memaddr; |
| 978 | break; |
| 979 | } |
| 980 | } |
| 981 | /* If the next symbol is after three bytes, we need to |
| 982 | print only part of the data, so that we can use either |
| 983 | .byte or .short. */ |
| 984 | if (size == 3) |
| 985 | size = (memaddr & 1) ? 1 : 2; |
| 986 | } |
| 987 | } |
| 988 | info->bytes_per_line = 4; |
| 989 | |
| 990 | if (is_data) |
| 991 | { |
| 992 | int i; |
| 993 | |
| 994 | /* Size was already set above. */ |
| 995 | info->bytes_per_chunk = size; |
| 996 | printer = print_insn_data; |
| 997 | |
| 998 | status = info->read_memory_func (memaddr, (bfd_byte *) buf, size, info); |
| 999 | given = 0; |
| 1000 | if (info->endian == BFD_ENDIAN_LITTLE) |
| 1001 | for (i = size - 1; i >= 0; i--) |
| 1002 | given = buf[i] | (given << 8); |
| 1003 | else |
| 1004 | for (i = 0; i < (int) size; i++) |
| 1005 | given = buf[i] | (given << 8); |
| 1006 | |
| 1007 | printer (memaddr, info, given); |
| 1008 | return info->bytes_per_chunk; |
| 1009 | } |
| 1010 | |
| 1011 | /* Handle instructions. */ |
| 1012 | CSKY_READ_DATA(); |
| 1013 | if ((inst & 0xc000) == 0xc000 && IS_CSKY_V2 (mach_flag)) |
| 1014 | { |
| 1015 | /* It's a 32-bit instruction. */ |
| 1016 | inst <<= 16; |
| 1017 | CSKY_READ_DATA(); |
| 1018 | if (info->buffer && (info->endian == BFD_ENDIAN_LITTLE)) |
| 1019 | { |
| 1020 | char* src = (char *)(info->buffer |
| 1021 | + ((memaddr - 4 - info->buffer_vma) |
| 1022 | * info->octets_per_byte)); |
| 1023 | if (info->endian == BFD_ENDIAN_LITTLE) |
| 1024 | number_to_chars_littleendian (src, inst, 4); |
| 1025 | } |
| 1026 | } |
| 1027 | |
| 1028 | if (IS_CSKY_V1 (mach_flag)) |
| 1029 | g_opcodeP = csky_v1_opcodes; |
| 1030 | else |
| 1031 | g_opcodeP = csky_v2_opcodes; |
| 1032 | |
| 1033 | do |
| 1034 | { |
| 1035 | struct csky_opcode const *op; |
| 1036 | struct csky_opcode_info const *pinfo = NULL; |
| 1037 | int reloc; |
| 1038 | |
| 1039 | memset (str, 0, sizeof (str)); |
| 1040 | op = csky_find_inst_info (&pinfo, inst, info->bytes_per_chunk); |
| 1041 | if (!op) |
| 1042 | { |
| 1043 | if (IS_CSKY_V1 (mach_flag)) |
| 1044 | info->fprintf_func (info->stream, ".short: 0x%04x", |
| 1045 | (unsigned short)inst); |
| 1046 | else |
| 1047 | info->fprintf_func (info->stream, ".long: 0x%08x", |
| 1048 | (unsigned int)inst); |
| 1049 | return info->bytes_per_chunk; |
| 1050 | } |
| 1051 | |
| 1052 | if (info->bytes_per_chunk == 2) |
| 1053 | reloc = op->reloc16; |
| 1054 | else |
| 1055 | reloc = op->reloc32; |
| 1056 | dis_info.opinfo = pinfo; |
| 1057 | strcat (str, op->mnemonic); |
| 1058 | |
| 1059 | if (csky_print_operands (str, pinfo, info, inst, reloc)) |
| 1060 | g_opcodeP++; |
| 1061 | else |
| 1062 | break; |
| 1063 | } while (1); |
| 1064 | |
| 1065 | return info->bytes_per_chunk; |
| 1066 | } |