1 /* C-SKY disassembler. 2 Copyright (C) 1988-2020 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 } 1067