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 if (n == 0) 138 abort (); 139 int i; 140 int val = 0; 141 142 if (dis_info.info->endian == BFD_ENDIAN_BIG) 143 while (n--) 144 val |= buf[n] << (n*8); 145 else 146 for (i = 0; i < n; i++) 147 val |= buf[i] << (i*8); 148 return val; 149 } 150 151 static struct csky_opcode const *g_opcodeP; 152 153 static struct csky_opcode const * 154 csky_find_inst_info (struct csky_opcode_info const **pinfo, 155 CSKY_INST_TYPE inst, int length) 156 { 157 int i; 158 unsigned int mask; 159 struct csky_opcode const *p; 160 161 p = g_opcodeP; 162 while (p->mnemonic) 163 { 164 /* Get the opcode mask. */ 165 for (i = 0; i < OP_TABLE_NUM; i++) 166 if (length == 2) 167 { 168 mask = csky_get_mask (&p->op16[i]); 169 if (mask != 0 && (inst & mask) == p->op16[i].opcode) 170 { 171 *pinfo = &p->op16[i]; 172 g_opcodeP = p; 173 return p; 174 } 175 } 176 else if (length == 4) 177 { 178 mask = csky_get_mask (&p->op32[i]); 179 if (mask != 0 180 && ((unsigned long)(inst & mask) 181 == (unsigned long)p->op32[i].opcode)) 182 { 183 *pinfo = &p->op32[i]; 184 g_opcodeP = p; 185 return p; 186 } 187 } 188 p++; 189 } 190 191 return NULL; 192 } 193 194 static bfd_boolean 195 is_extern_symbol (struct disassemble_info *info, int addr) 196 { 197 unsigned int rel_count = 0; 198 199 if (info->section == NULL) 200 return 0; 201 if ((info->section->flags & SEC_RELOC) != 0) /* Fit .o file. */ 202 { 203 struct reloc_cache_entry *pt = info->section->relocation; 204 for (; rel_count < info->section->reloc_count; rel_count++, pt++) 205 if ((long unsigned int)addr == pt->address) 206 return TRUE; 207 return FALSE; 208 } 209 return FALSE; 210 } 211 212 213 /* Suppress printing of mapping symbols emitted by the assembler to mark 214 the beginning of code and data sequences. */ 215 216 bfd_boolean 217 csky_symbol_is_valid (asymbol *sym, 218 struct disassemble_info *info ATTRIBUTE_UNUSED) 219 { 220 const char *name; 221 222 if (sym == NULL) 223 return FALSE; 224 name = bfd_asymbol_name (sym); 225 return name && *name != '$'; 226 } 227 228 disassembler_ftype 229 csky_get_disassembler (bfd *abfd) 230 { 231 if (abfd != NULL) 232 mach_flag = elf_elfheader (abfd)->e_flags; 233 return print_insn_csky; 234 } 235 236 static int 237 csky_output_operand (char *str, struct operand const *oprnd, 238 CSKY_INST_TYPE inst, int reloc ATTRIBUTE_UNUSED) 239 { 240 int ret = 0;; 241 int bit = 0; 242 int result = 0; 243 bfd_vma value; 244 int mask = oprnd->mask; 245 int max = 0; 246 char buf[128]; 247 248 /* Get operand value with mask. */ 249 value = inst & mask; 250 for (; mask; mask >>= 1, value >>=1) 251 if (mask & 0x1) 252 { 253 result |= ((value & 0x1) << bit); 254 max |= (1 << bit); 255 bit++; 256 } 257 value = result; 258 259 /* Here is general instructions that have no reloc. */ 260 switch (oprnd->type) 261 { 262 case OPRND_TYPE_CTRLREG: 263 if (IS_CSKY_V1 (mach_flag)) 264 { 265 /* In V1 only cr0-cr12 have alias names. */ 266 if (value <= 12) 267 strcat (str, csky_ctrl_regs[value].name); 268 /* Others using crn(n > 12). */ 269 else if (value <= 30) 270 { 271 sprintf (buf, "cr%d", (int)value); 272 strcat (str, buf); 273 } 274 else 275 return -1; 276 } 277 else 278 { 279 int sel; 280 int crx; 281 sel = value >> 5; 282 crx = value & 0x1f; 283 sprintf (buf, "cr<%d, %d>", crx, sel); 284 strcat (str, buf); 285 } 286 break; 287 case OPRND_TYPE_DUMMY_REG: 288 mask = dis_info.opinfo->oprnd.oprnds[0].mask; 289 value = inst & mask; 290 for (; mask; mask >>= 1, value >>=1) 291 if (mask & 0x1) 292 { 293 result |= ((value & 0x1) << bit); 294 bit++; 295 } 296 value = result; 297 strcat (str, csky_general_reg[value]); 298 break; 299 case OPRND_TYPE_GREG0_7: 300 case OPRND_TYPE_GREG0_15: 301 case OPRND_TYPE_GREG16_31: 302 case OPRND_TYPE_REGnsplr: 303 case OPRND_TYPE_AREG: 304 if (IS_CSKY_V2 (mach_flag) && value == 14) 305 strcat (str, "sp"); 306 else 307 strcat (str, csky_general_reg[value]); 308 dis_info.value = value; 309 break; 310 case OPRND_TYPE_CPREG: 311 strcat (str, csky_cp_reg[value]); 312 break; 313 case OPRND_TYPE_FREG: 314 sprintf (buf, "fr%d", (int)value); 315 strcat (str, buf); 316 break; 317 case OPRND_TYPE_VREG: 318 sprintf (buf, "vr%d", (int)value); 319 strcat (str, buf); 320 break; 321 case OPRND_TYPE_CPCREG: 322 strcat (str, csky_cp_creg[value]); 323 break; 324 case OPRND_TYPE_CPIDX: 325 strcat (str, csky_cp_idx[value]); 326 break; 327 case OPRND_TYPE_IMM2b_JMPIX: 328 value = (value + 2) << 3; 329 sprintf (buf, "%d", (int)value); 330 strcat (str, buf); 331 break; 332 case OPRND_TYPE_IMM_LDST: 333 case OPRND_TYPE_IMM_FLDST: 334 value <<= oprnd->shift; 335 sprintf (buf, "0x%x", (unsigned int)value); 336 strcat (str, buf); 337 break; 338 case OPRND_TYPE_IMM7b_LS2: 339 case OPRND_TYPE_IMM8b_LS2: 340 sprintf (buf, "%d", (int)(value << 2)); 341 strcat (str, buf); 342 ret = 0; 343 break; 344 case OPRND_TYPE_IMM5b_BMASKI: 345 if ((value != 0) && (value > 31 || value < 8)) 346 { 347 ret = -1; 348 break; 349 } 350 sprintf (buf, "%d", (int)value); 351 strcat (str, buf); 352 ret = 0; 353 break; 354 case OPRND_TYPE_IMM5b_1_31: 355 if (value > 31 || value < 1) 356 { 357 ret = -1; 358 break; 359 } 360 sprintf (buf, "%d", (int)value); 361 strcat (str, buf); 362 ret = 0; 363 break; 364 case OPRND_TYPE_IMM5b_7_31: 365 if (value > 31 || value < 7) 366 { 367 ret = -1; 368 break; 369 } 370 sprintf (buf, "%d", (int)value); 371 strcat (str, buf); 372 ret = 0; 373 break; 374 case OPRND_TYPE_MSB2SIZE: 375 case OPRND_TYPE_LSB2SIZE: 376 { 377 static int size; 378 if (oprnd->type == OPRND_TYPE_MSB2SIZE) 379 size = value; 380 else 381 { 382 str[strlen (str) - 2] = '\0'; 383 sprintf (buf, "%d, %d", (int)(size + value), (int)value); 384 strcat (str, buf); 385 } 386 break; 387 } 388 case OPRND_TYPE_IMM1b: 389 case OPRND_TYPE_IMM2b: 390 case OPRND_TYPE_IMM4b: 391 case OPRND_TYPE_IMM5b: 392 case OPRND_TYPE_IMM7b: 393 case OPRND_TYPE_IMM8b: 394 case OPRND_TYPE_IMM12b: 395 case OPRND_TYPE_IMM15b: 396 case OPRND_TYPE_IMM16b: 397 case OPRND_TYPE_IMM16b_MOVIH: 398 case OPRND_TYPE_IMM16b_ORI: 399 sprintf (buf, "%d", (int)value); 400 strcat (str, buf); 401 ret = 0; 402 break; 403 case OPRND_TYPE_OFF8b: 404 case OPRND_TYPE_OFF16b: 405 { 406 unsigned char ibytes[4]; 407 int shift = oprnd->shift; 408 int status; 409 unsigned int mem_val; 410 411 dis_info.info->stop_vma = 0; 412 413 value = ((dis_info.mem + (value << shift) 414 + ((IS_CSKY_V1 (mach_flag)) ? 2 : 0)) 415 & 0xfffffffc); 416 status = dis_info.info->read_memory_func (value, ibytes, 4, 417 dis_info.info); 418 if (status != 0) 419 { 420 dis_info.info->memory_error_func (status, dis_info.mem, 421 dis_info.info); 422 return -1; 423 } 424 mem_val = csky_chars_to_number (ibytes, 4); 425 /* Remove [] around literal value to match ABI syntax. */ 426 sprintf (buf, "0x%X", mem_val); 427 strcat (str, buf); 428 /* For jmpi/jsri, we'll try to get a symbol for the target. */ 429 if (dis_info.info->print_address_func && mem_val != 0) 430 { 431 dis_info.value = mem_val; 432 dis_info.need_output_symbol = 1; 433 } 434 else 435 { 436 sprintf (buf, "\t// from address pool at 0x%x", 437 (unsigned int)value); 438 strcat (str, buf); 439 } 440 break; 441 } 442 case OPRND_TYPE_BLOOP_OFF4b: 443 case OPRND_TYPE_BLOOP_OFF12b: 444 case OPRND_TYPE_OFF11b: 445 case OPRND_TYPE_OFF16b_LSL1: 446 case OPRND_TYPE_IMM_OFF18b: 447 case OPRND_TYPE_OFF26b: 448 { 449 int shift = oprnd->shift; 450 if (value & ((max >> 1) + 1)) 451 value |= ~max; 452 if (is_extern_symbol (dis_info.info, dis_info.mem)) 453 value = 0; 454 else if (IS_CSKY_V1 (mach_flag)) 455 value = dis_info.mem + 2 + (value << shift); 456 else 457 value = dis_info.mem + (value << shift); 458 dis_info.need_output_symbol = 1; 459 dis_info.value= value; 460 sprintf (buf, "0x%x", (unsigned int)value); 461 strcat (str, buf); 462 break; 463 } 464 case OPRND_TYPE_CONSTANT: 465 case OPRND_TYPE_FCONSTANT: 466 { 467 int shift = oprnd->shift; 468 char ibytes[8]; 469 int status; 470 bfd_vma addr; 471 int nbytes; 472 473 dis_info.info->stop_vma = 0; 474 value <<= shift; 475 476 if (IS_CSKY_V1 (mach_flag)) 477 addr = (dis_info.mem + 2 + value) & 0xfffffffc; 478 else 479 addr = (dis_info.mem + value) & 0xfffffffc; 480 481 if (oprnd->type == OPRND_TYPE_FCONSTANT 482 && dis_info.opinfo->opcode != CSKYV2_INST_FLRW) 483 nbytes = 8; 484 else 485 nbytes = 4; 486 487 status = dis_info.info->read_memory_func (addr, (bfd_byte *)ibytes, 488 nbytes, dis_info.info); 489 if (status != 0) 490 /* Address out of bounds. -> lrw rx, [pc, 0ffset]. */ 491 sprintf (buf, "[pc, %d]\t// from address pool at %x", (int)value, 492 (unsigned int)addr); 493 else 494 { 495 dis_info.value = addr; 496 value = csky_chars_to_number ((unsigned char *)ibytes, 4); 497 } 498 499 if (oprnd->type == OPRND_TYPE_FCONSTANT) 500 { 501 double f; 502 503 if (dis_info.opinfo->opcode == CSKYV2_INST_FLRW) 504 /* flrws. */ 505 floatformat_to_double ((dis_info.info->endian == BFD_ENDIAN_BIG 506 ? &floatformat_ieee_single_big 507 : &floatformat_ieee_single_little), 508 ibytes, &f); 509 else 510 floatformat_to_double ((dis_info.info->endian == BFD_ENDIAN_BIG 511 ? &floatformat_ieee_double_big 512 : &floatformat_ieee_double_little), 513 ibytes, &f); 514 sprintf (buf, "%f", f); 515 } 516 else 517 { 518 dis_info.need_output_symbol = 1; 519 sprintf (buf, "0x%x", (unsigned int)value); 520 } 521 522 strcat (str, buf); 523 break; 524 } 525 case OPRND_TYPE_ELRW_CONSTANT: 526 { 527 int shift = oprnd->shift; 528 char ibytes[4]; 529 int status; 530 bfd_vma addr; 531 dis_info.info->stop_vma = 0; 532 533 value = 0x80 + ((~value) & 0x7f); 534 535 value = value << shift; 536 addr = (dis_info.mem + value) & 0xfffffffc; 537 538 status = dis_info.info->read_memory_func (addr, (bfd_byte *)ibytes, 539 4, dis_info.info); 540 if (status != 0) 541 /* Address out of bounds. -> lrw rx, [pc, 0ffset]. */ 542 sprintf (buf, "[pc, %d]\t// from address pool at %x", (int) value, 543 (unsigned int)addr); 544 else 545 { 546 dis_info.value = addr; 547 value = csky_chars_to_number ((unsigned char *)ibytes, 4); 548 dis_info.need_output_symbol = 1; 549 sprintf (buf, "0x%x", (unsigned int)value); 550 } 551 552 strcat (str, buf); 553 break; 554 } 555 case OPRND_TYPE_SFLOAT: 556 case OPRND_TYPE_DFLOAT: 557 { 558 /* This is for fmovis/fmovid, which have an internal 13-bit 559 encoding that they convert to single/double precision 560 (respectively). We'll convert the 13-bit encoding to an IEEE 561 double and then to host double format to print it. 562 Sign bit: bit 20. 563 4-bit exponent: bits 19:16, biased by 11. 564 8-bit mantissa: split between 24:21 and 7:4. */ 565 uint64_t imm4; 566 uint64_t imm8; 567 uint64_t dbnum; 568 unsigned char valbytes[8]; 569 double fvalue; 570 571 imm4 = ((inst >> 16) & 0xf); 572 imm4 = (uint64_t)(1023 - (imm4 - 11)) << 52; 573 574 imm8 = (uint64_t)((inst >> 4) & 0xf) << 44; 575 imm8 |= (uint64_t)((inst >> 21) & 0xf) << 48; 576 577 dbnum = (uint64_t)((inst >> 20) & 1) << 63; 578 dbnum |= imm4 | imm8; 579 580 /* Do this a byte at a time so we don't have to 581 worry about the host's endianness. */ 582 valbytes[0] = dbnum & 0xff; 583 valbytes[1] = (dbnum >> 8) & 0xff; 584 valbytes[2] = (dbnum >> 16) & 0xff; 585 valbytes[3] = (dbnum >> 24) & 0xff; 586 valbytes[4] = (dbnum >> 32) & 0xff; 587 valbytes[5] = (dbnum >> 40) & 0xff; 588 valbytes[6] = (dbnum >> 48) & 0xff; 589 valbytes[7] = (dbnum >> 56) & 0xff; 590 591 floatformat_to_double (&floatformat_ieee_double_little, valbytes, 592 &fvalue); 593 594 sprintf (buf, "%f", fvalue); 595 strcat (str, buf); 596 break; 597 } 598 case OPRND_TYPE_LABEL_WITH_BRACKET: 599 sprintf (buf, "[0x%x]", (unsigned int)value); 600 strcat (str, buf); 601 strcat (str, "\t// the offset is based on .data"); 602 break; 603 case OPRND_TYPE_OIMM3b: 604 case OPRND_TYPE_OIMM4b: 605 case OPRND_TYPE_OIMM5b: 606 case OPRND_TYPE_OIMM5b_IDLY: 607 case OPRND_TYPE_OIMM8b: 608 case OPRND_TYPE_OIMM12b: 609 case OPRND_TYPE_OIMM16b: 610 case OPRND_TYPE_OIMM18b: 611 value += 1; 612 sprintf (buf, "%d", (int)value); 613 strcat (str, buf); 614 break; 615 case OPRND_TYPE_OIMM5b_BMASKI: 616 if (value > 32 || value < 16) 617 { 618 ret = -1; 619 break; 620 } 621 sprintf (buf, "%d", (int)(value + 1)); 622 strcat (str, buf); 623 ret = 0; 624 break; 625 case OPRND_TYPE_FREGLIST_DASH: 626 if (IS_CSKY_V2 (mach_flag)) 627 { 628 int vrx = value & 0xf; 629 int vry = vrx + (value >> 4); 630 sprintf (buf, "fr%d-fr%d", vrx, vry); 631 strcat (str, buf); 632 } 633 break; 634 case OPRND_TYPE_REGLIST_DASH: 635 if (IS_CSKY_V1 (mach_flag)) 636 { 637 strcat (str, csky_general_reg[value]); 638 strcat (str, "-r15"); 639 } 640 else 641 { 642 strcat (str, csky_general_reg[value >> 5]); 643 strcat (str, "-"); 644 strcat (str, csky_general_reg[(value & 0x1f) + (value >> 5)]); 645 } 646 break; 647 case OPRND_TYPE_PSR_BITS_LIST: 648 { 649 struct psrbit const *bits; 650 int first_oprnd = TRUE; 651 int i = 0; 652 if (IS_CSKY_V1 (mach_flag)) 653 { 654 if (value == 0) 655 { 656 strcat (str, "af"); 657 break; 658 } 659 bits = cskyv1_psr_bits; 660 } 661 else 662 bits = cskyv2_psr_bits; 663 while (value != 0 && bits[i].name != NULL) 664 { 665 if (value & bits[i].value) 666 { 667 if (!first_oprnd) 668 strcat (str, ", "); 669 strcat (str, bits[i].name); 670 value &= ~bits[i].value; 671 first_oprnd = FALSE; 672 } 673 i++; 674 } 675 break; 676 } 677 case OPRND_TYPE_REGbsp: 678 if (IS_CSKY_V1 (mach_flag)) 679 strcat (str, "(sp)"); 680 else 681 strcat (str, "(sp)"); 682 break; 683 case OPRND_TYPE_REGsp: 684 if (IS_CSKY_V1 (mach_flag)) 685 strcat (str, "sp"); 686 else 687 strcat (str, "sp"); 688 break; 689 case OPRND_TYPE_REGnr4_r7: 690 case OPRND_TYPE_AREG_WITH_BRACKET: 691 if (IS_CSKY_V1 (mach_flag) && (value < 4 || value > 7)) 692 { 693 strcat (str, "("); 694 strcat (str, csky_general_reg[value]); 695 strcat (str, ")"); 696 } 697 else 698 { 699 strcat (str, "("); 700 strcat (str, csky_general_reg[value]); 701 strcat (str, ")"); 702 } 703 break; 704 case OPRND_TYPE_AREG_WITH_LSHIFT: 705 strcat (str, csky_general_reg[value >> 5]); 706 strcat (str, " << "); 707 if ((value & 0x1f) == 0x1) 708 strcat (str, "0"); 709 else if ((value & 0x1f) == 0x2) 710 strcat (str, "1"); 711 else if ((value & 0x1f) == 0x4) 712 strcat (str, "2"); 713 else if ((value & 0x1f) == 0x8) 714 strcat (str, "3"); 715 break; 716 case OPRND_TYPE_AREG_WITH_LSHIFT_FPU: 717 strcat (str, csky_general_reg[value >> 2]); 718 strcat (str, " << "); 719 if ((value & 0x3) == 0x0) 720 strcat (str, "0"); 721 else if ((value & 0x3) == 0x1) 722 strcat (str, "1"); 723 else if ((value & 0x3) == 0x2) 724 strcat (str, "2"); 725 else if ((value & 0x3) == 0x3) 726 strcat (str, "3"); 727 break; 728 case OPRND_TYPE_FREG_WITH_INDEX: 729 { 730 unsigned freg_val = value & 0xf; 731 unsigned index_val = (value >> 4) & 0xf; 732 sprintf (buf, "vr%d[%d]", freg_val, index_val); 733 strcat(str, buf); 734 break; 735 } 736 case OPRND_TYPE_REGr4_r7: 737 if (IS_CSKY_V1 (mach_flag)) 738 strcat (str, "r4-r7"); 739 break; 740 case OPRND_TYPE_CONST1: 741 strcat (str, "1"); 742 break; 743 case OPRND_TYPE_REG_r1a: 744 case OPRND_TYPE_REG_r1b: 745 strcat (str, "r1"); 746 break; 747 case OPRND_TYPE_REG_r28: 748 strcat (str, "r28"); 749 break; 750 case OPRND_TYPE_REGLIST_DASH_COMMA: 751 /* 16-bit reglist. */ 752 if (value & 0xf) 753 { 754 strcat (str, "r4"); 755 if ((value & 0xf) > 1) 756 { 757 strcat (str, "-"); 758 strcat (str, csky_general_reg[(value & 0xf) + 3]); 759 } 760 if (value & ~0xf) 761 strcat (str, ", "); 762 } 763 if (value & 0x10) 764 { 765 /* r15. */ 766 strcat (str, "r15"); 767 if (value & ~0x1f) 768 strcat (str, ", "); 769 } 770 if (dis_info.opinfo->oprnd.oprnds[0].mask != OPRND_MASK_0_4) 771 { 772 /* 32bits reglist. */ 773 value >>= 5; 774 if (value & 0x3) 775 { 776 strcat (str, "r16"); 777 if ((value & 0x7) > 1) 778 { 779 strcat (str, "-"); 780 strcat (str, csky_general_reg[(value & 0xf) + 15]); 781 } 782 if (value & ~0x7) 783 strcat (str, ", "); 784 } 785 if (value & 0x8) 786 /* r15. */ 787 strcat (str, "r28"); 788 } 789 break; 790 case OPRND_TYPE_UNCOND10b: 791 case OPRND_TYPE_UNCOND16b: 792 case OPRND_TYPE_COND10b: 793 case OPRND_TYPE_COND16b: 794 { 795 int shift = oprnd->shift; 796 797 if (value & ((max >> 1) + 1)) 798 value |= ~max; 799 if (is_extern_symbol (dis_info.info, dis_info.mem)) 800 value = 0; 801 else 802 value = dis_info.mem + (value << shift); 803 sprintf (buf, "0x%x", (unsigned int)value); 804 strcat (str, buf); 805 dis_info.need_output_symbol = 1; 806 dis_info.value = value; 807 } 808 break; 809 810 default: 811 ret = -1; 812 break; 813 } 814 return ret; 815 } 816 817 static int 818 csky_print_operand (char *str, struct operand const *oprnd, 819 CSKY_INST_TYPE inst, int reloc) 820 { 821 int ret = -1; 822 char *lc = ""; 823 char *rc = ""; 824 if (oprnd->mask == HAS_SUB_OPERAND) 825 { 826 struct soperand *sop = (struct soperand *)oprnd; 827 if (oprnd->type == OPRND_TYPE_BRACKET) 828 { 829 lc = "("; 830 rc = ")"; 831 } 832 else if (oprnd->type == OPRND_TYPE_ABRACKET) 833 { 834 lc = "<"; 835 rc = ">"; 836 } 837 strcat (str, lc); 838 ret = csky_print_operand (str, &sop->subs[0], inst, reloc); 839 if (ret) 840 return ret; 841 strcat (str, ", "); 842 ret = csky_print_operand (str, &sop->subs[1], inst, reloc); 843 strcat (str, rc); 844 return ret; 845 } 846 return csky_output_operand (str, oprnd, inst, reloc); 847 } 848 849 static int 850 csky_print_operands (char *str, struct csky_opcode_info const *pinfo, 851 struct disassemble_info *info, CSKY_INST_TYPE inst, 852 int reloc) 853 { 854 int i = 0; 855 int ret = 0; 856 if (pinfo->operand_num) 857 strcat (str, " \t"); 858 if (pinfo->operand_num == -1) 859 { 860 ret = csky_print_operand (str, &pinfo->oprnd.oprnds[i], inst, reloc); 861 if (ret) 862 return ret; 863 } 864 else 865 for (; i < pinfo->operand_num; i++) 866 { 867 if (i != 0) 868 strcat (str, ", "); 869 ret = csky_print_operand (str, &pinfo->oprnd.oprnds[i], inst, reloc); 870 if (ret) 871 return ret; 872 } 873 info->fprintf_func (info->stream, "%s", str); 874 if (dis_info.need_output_symbol) 875 { 876 info->fprintf_func (info->stream, "\t// "); 877 info->print_address_func (dis_info.value, dis_info.info); 878 } 879 return 0; 880 } 881 882 static void 883 number_to_chars_littleendian (char *buf, CSKY_INST_TYPE val, int n) 884 { 885 if (n <= 0) 886 abort (); 887 while (n--) 888 { 889 *buf++ = val & 0xff; 890 val >>= 8; 891 } 892 } 893 894 #define CSKY_READ_DATA() \ 895 { \ 896 status = info->read_memory_func (memaddr, buf, 2, info); \ 897 if (status) \ 898 { \ 899 info->memory_error_func (status, memaddr, info); \ 900 return -1; \ 901 } \ 902 if (info->endian == BFD_ENDIAN_BIG) \ 903 inst |= (buf[0] << 8) | buf[1]; \ 904 else if (info->endian == BFD_ENDIAN_LITTLE) \ 905 inst |= (buf[1] << 8) | buf[0]; \ 906 else \ 907 abort(); \ 908 info->bytes_per_chunk += 2; \ 909 memaddr += 2; \ 910 } 911 912 int 913 print_insn_csky (bfd_vma memaddr, struct disassemble_info *info) 914 { 915 unsigned char buf[4]; 916 CSKY_INST_TYPE inst = 0; 917 int status; 918 char str[256]; 919 long given; 920 int is_data = FALSE; 921 void (*printer) (bfd_vma, struct disassemble_info *, long); 922 unsigned int size = 4; 923 924 memset (str, 0, sizeof (str)); 925 info->bytes_per_chunk = 0; 926 info->bytes_per_chunk = 0; 927 dis_info.mem = memaddr; 928 dis_info.info = info; 929 dis_info.need_output_symbol = 0; 930 if (mach_flag != INIT_MACH_FLAG && mach_flag != BINARY_MACH_FLAG) 931 info->mach = mach_flag; 932 else if (mach_flag == INIT_MACH_FLAG) 933 mach_flag = info->mach; 934 935 if (mach_flag == BINARY_MACH_FLAG && info->endian == BFD_ENDIAN_UNKNOWN) 936 info->endian = BFD_ENDIAN_LITTLE; 937 938 /* First check the full symtab for a mapping symbol, even if there 939 are no usable non-mapping symbols for this address. */ 940 if (info->symtab_size != 0 941 && bfd_asymbol_flavour (*info->symtab) == bfd_target_elf_flavour) 942 { 943 bfd_vma addr; 944 int n; 945 int last_sym = -1; 946 enum sym_type type = CUR_TEXT; 947 948 if (memaddr <= last_map_addr) 949 last_map_sym = -1; 950 /* Start scanning at the start of the function, or wherever 951 we finished last time. */ 952 n = 0; 953 if (n < last_map_sym) 954 n = last_map_sym; 955 956 /* Scan up to the location being disassembled. */ 957 for (; n < info->symtab_size; n++) 958 { 959 addr = bfd_asymbol_value (info->symtab[n]); 960 if (addr > memaddr) 961 break; 962 if ((info->section == NULL 963 || info->section == info->symtab[n]->section) 964 && get_sym_code_type (info, n, &type)) 965 last_sym = n; 966 } 967 last_map_sym = last_sym; 968 last_type = type; 969 is_data = (last_type == CUR_DATA); 970 if (is_data) 971 { 972 size = 4 - ( memaddr & 3); 973 for (n = last_sym + 1; n < info->symtab_size; n++) 974 { 975 addr = bfd_asymbol_value (info->symtab[n]); 976 if (addr > memaddr) 977 { 978 if (addr - memaddr < size) 979 size = addr - memaddr; 980 break; 981 } 982 } 983 /* If the next symbol is after three bytes, we need to 984 print only part of the data, so that we can use either 985 .byte or .short. */ 986 if (size == 3) 987 size = (memaddr & 1) ? 1 : 2; 988 } 989 } 990 info->bytes_per_line = 4; 991 992 if (is_data) 993 { 994 int i; 995 996 /* Size was already set above. */ 997 info->bytes_per_chunk = size; 998 printer = print_insn_data; 999 1000 status = info->read_memory_func (memaddr, (bfd_byte *) buf, size, info); 1001 given = 0; 1002 if (info->endian == BFD_ENDIAN_LITTLE) 1003 for (i = size - 1; i >= 0; i--) 1004 given = buf[i] | (given << 8); 1005 else 1006 for (i = 0; i < (int) size; i++) 1007 given = buf[i] | (given << 8); 1008 1009 printer (memaddr, info, given); 1010 return info->bytes_per_chunk; 1011 } 1012 1013 /* Handle instructions. */ 1014 CSKY_READ_DATA(); 1015 if ((inst & 0xc000) == 0xc000 && IS_CSKY_V2 (mach_flag)) 1016 { 1017 /* It's a 32-bit instruction. */ 1018 inst <<= 16; 1019 CSKY_READ_DATA(); 1020 if (info->buffer && (info->endian == BFD_ENDIAN_LITTLE)) 1021 { 1022 char* src = (char *)(info->buffer 1023 + ((memaddr - 4 - info->buffer_vma) 1024 * info->octets_per_byte)); 1025 if (info->endian == BFD_ENDIAN_LITTLE) 1026 number_to_chars_littleendian (src, inst, 4); 1027 } 1028 } 1029 1030 if (IS_CSKY_V1 (mach_flag)) 1031 g_opcodeP = csky_v1_opcodes; 1032 else 1033 g_opcodeP = csky_v2_opcodes; 1034 1035 do 1036 { 1037 struct csky_opcode const *op; 1038 struct csky_opcode_info const *pinfo = NULL; 1039 int reloc; 1040 1041 memset (str, 0, sizeof (str)); 1042 op = csky_find_inst_info (&pinfo, inst, info->bytes_per_chunk); 1043 if (!op) 1044 { 1045 if (IS_CSKY_V1 (mach_flag)) 1046 info->fprintf_func (info->stream, ".short: 0x%04x", 1047 (unsigned short)inst); 1048 else 1049 info->fprintf_func (info->stream, ".long: 0x%08x", 1050 (unsigned int)inst); 1051 return info->bytes_per_chunk; 1052 } 1053 1054 if (info->bytes_per_chunk == 2) 1055 reloc = op->reloc16; 1056 else 1057 reloc = op->reloc32; 1058 dis_info.opinfo = pinfo; 1059 strcat (str, op->mnemonic); 1060 1061 if (csky_print_operands (str, pinfo, info, inst, reloc)) 1062 g_opcodeP++; 1063 else 1064 break; 1065 } while (1); 1066 1067 return info->bytes_per_chunk; 1068 } 1069