1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
|
/* NDS32-specific support for 32-bit ELF.
Copyright (C) 2012-2016 Free Software Foundation, Inc.
Contributed by Andes Technology Corporation.
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#include "sysdep.h"
#include <stdio.h>
#include "ansidecl.h"
#include "dis-asm.h"
#include "bfd.h"
#include "symcat.h"
#include "libiberty.h"
#include "opintl.h"
#include "bfd_stdint.h"
#include "hashtab.h"
#include "nds32-asm.h"
#include "opcode/nds32.h"
/* Get fields macro define. */
#define MASK_OP(insn, mask) ((insn) & (0x3f << 25 | (mask)))
/* Default text to print if an instruction isn't recognized. */
#define UNKNOWN_INSN_MSG _("*unknown*")
#define NDS32_PARSE_INSN16 0x01
#define NDS32_PARSE_INSN32 0x02
#define NDS32_PARSE_EX9IT 0x04
#define NDS32_PARSE_EX9TAB 0x08
extern struct nds32_opcode nds32_opcodes[];
extern const field_t operand_fields[];
extern const keyword_t *keywords[];
extern const keyword_t keyword_gpr[];
static void print_insn16 (bfd_vma pc, disassemble_info *info,
uint32_t insn, uint32_t parse_mode);
static void print_insn32 (bfd_vma pc, disassemble_info *info, uint32_t insn,
uint32_t parse_mode);
static uint32_t nds32_mask_opcode (uint32_t);
static void nds32_special_opcode (uint32_t, struct nds32_opcode **);
/* define in objdump.c. */
struct objdump_disasm_info
{
bfd * abfd;
asection * sec;
bfd_boolean require_sec;
arelent ** dynrelbuf;
long dynrelcount;
disassembler_ftype disassemble_fn;
arelent * reloc;
};
/* file_ptr ex9_filepos=NULL;. */
bfd_byte *ex9_data = NULL;
int ex9_ready = 0, ex9_base_offset = 0;
/* Hash function for disassemble. */
static htab_t opcode_htab;
static void
nds32_ex9_info (bfd_vma pc ATTRIBUTE_UNUSED,
disassemble_info *info, uint32_t ex9_index)
{
uint32_t insn;
static asymbol *itb = NULL;
bfd_byte buffer[4];
long unsigned int isec_vma;
/* Lookup itb symbol. */
if (!itb)
{
int i;
for (i = 0; i < info->symtab_size; i++)
if (bfd_asymbol_name (info->symtab[i])
&& (strcmp (bfd_asymbol_name (info->symtab[i]), "$_ITB_BASE_") == 0
|| strcmp (bfd_asymbol_name (info->symtab[i]),
"_ITB_BASE_") == 0))
{
itb = info->symtab[i];
break;
}
/* Lookup it only once, in case _ITB_BASE_ doesn't exist at all. */
if (itb == NULL)
itb = (void *) -1;
}
if (itb == (void *) -1)
return;
isec_vma = itb->section->vma;
isec_vma = itb->section->vma - bfd_asymbol_value (itb);
if (!itb->section || !itb->section->owner)
return;
bfd_get_section_contents (itb->section->owner, itb->section, buffer,
ex9_index * 4 - isec_vma, 4);
insn = bfd_getb32 (buffer);
/* 16-bit instructions in ex9 table. */
if (insn & 0x80000000)
print_insn16 (pc, info, (insn & 0x0000FFFF),
NDS32_PARSE_INSN16 | NDS32_PARSE_EX9IT);
/* 32-bit instructions in ex9 table. */
else
print_insn32 (pc, info, insn, NDS32_PARSE_INSN32 | NDS32_PARSE_EX9IT);
}
/* Find the value map register name. */
static keyword_t *
nds32_find_reg_keyword (keyword_t *reg, int value)
{
if (!reg)
return NULL;
while (reg->name != NULL && reg->value != value)
{
reg++;
}
if (reg->name == NULL)
return NULL;
return reg;
}
static void
nds32_parse_audio_ext (const field_t *pfd,
disassemble_info *info, uint32_t insn)
{
fprintf_ftype func = info->fprintf_func;
void *stream = info->stream;
keyword_t *psys_reg;
int int_value, new_value;
if (pfd->hw_res == HW_INT || pfd->hw_res == HW_UINT)
{
if (pfd->hw_res == HW_INT)
int_value =
N32_IMMS ((insn >> pfd->bitpos), pfd->bitsize) << pfd->shift;
else
int_value = __GF (insn, pfd->bitpos, pfd->bitsize) << pfd->shift;
if (int_value < 10)
func (stream, "#%d", int_value);
else
func (stream, "#0x%x", int_value);
return;
}
int_value =
__GF (insn, pfd->bitpos, pfd->bitsize) << pfd->shift;
new_value = int_value;
psys_reg = (keyword_t*) keywords[pfd->hw_res];
/* p = bit[4].bit[1:0], r = bit[4].bit[3:2]. */
if (strcmp (pfd->name, "im5_i") == 0)
{
new_value = int_value & 0x03;
new_value |= ((int_value & 0x10) >> 2);
}
else if (strcmp (pfd->name, "im5_m") == 0)
{
new_value = ((int_value & 0x1C) >> 2);
}
/* p = 0.bit[1:0], r = 0.bit[3:2]. */
/* q = 1.bit[1:0], s = 1.bit[5:4]. */
else if (strcmp (pfd->name, "im6_iq") == 0)
{
new_value |= 0x04;
}
else if (strcmp (pfd->name, "im6_ms") == 0)
{
new_value |= 0x04;
}
/* Rt CONCAT(c, t21, t0). */
else if (strcmp (pfd->name, "a_rt21") == 0)
{
new_value = (insn & 0x00000020) >> 5;
new_value |= (insn & 0x00000C00) >> 9;
new_value |= (insn & 0x00008000) >> 12;
}
else if (strcmp (pfd->name, "a_rte") == 0)
{
new_value = (insn & 0x00000C00) >> 9;
new_value |= (insn & 0x00008000) >> 12;
}
else if (strcmp (pfd->name, "a_rte1") == 0)
{
new_value = (insn & 0x00000C00) >> 9;
new_value |= (insn & 0x00008000) >> 12;
new_value |= 0x01;
}
else if (strcmp (pfd->name, "a_rte69") == 0)
{
new_value = int_value << 1;
}
else if (strcmp (pfd->name, "a_rte69_1") == 0)
{
new_value = int_value << 1;
new_value |= 0x01;
}
psys_reg = nds32_find_reg_keyword (psys_reg, new_value);
if (!psys_reg)
func (stream, "???");
else
func (stream, "$%s", psys_reg->name);
}
/* Dump instruction. If the opcode is unknown, return FALSE. */
static void
nds32_parse_opcode (struct nds32_opcode *opc, bfd_vma pc ATTRIBUTE_UNUSED,
disassemble_info *info, uint32_t insn,
uint32_t parse_mode)
{
int op = 0;
fprintf_ftype func = info->fprintf_func;
void *stream = info->stream;
const char *pstr_src;
char *pstr_tmp;
char tmp_string[16];
unsigned int push25gpr = 0, lsmwRb, lsmwRe, lsmwEnb4, checkbit, i;
int int_value, ifthe1st = 1;
const field_t *pfd;
keyword_t *psys_reg;
if (opc == NULL)
{
func (stream, UNKNOWN_INSN_MSG);
return;
}
if (parse_mode & NDS32_PARSE_EX9IT)
func (stream, " !");
pstr_src = opc->instruction;
if (*pstr_src == 0)
{
func (stream, "%s", opc->opcode);
return;
}
/* NDS32_PARSE_INSN16. */
if (parse_mode & NDS32_PARSE_INSN16)
{
func (stream, "%s ", opc->opcode);
}
/* NDS32_PARSE_INSN32. */
else
{
op = N32_OP6 (insn);
if (op == N32_OP6_LSMW)
func (stream, "%s.", opc->opcode);
else if (strstr (opc->instruction, "tito"))
func (stream, "%s", opc->opcode);
else
func (stream, "%s\t", opc->opcode);
}
while (*pstr_src)
{
switch (*pstr_src)
{
case '%':
case '=':
case '&':
pstr_src++;
/* Compare with operand_fields[].name. */
pstr_tmp = &tmp_string[0];
while (*pstr_src)
{
if ((*pstr_src == ',') || (*pstr_src == ' ')
|| (*pstr_src == '{') || (*pstr_src == '}')
|| (*pstr_src == '[') || (*pstr_src == ']')
|| (*pstr_src == '(') || (*pstr_src == ')')
|| (*pstr_src == '+') || (*pstr_src == '<'))
break;
*pstr_tmp++ = *pstr_src++;
}
*pstr_tmp = 0;
pfd = (const field_t *) &operand_fields[0];
while (1)
{
if (pfd->name == NULL)
return;
else if (strcmp (&tmp_string[0], pfd->name) == 0)
break;
pfd++;
}
/* For insn-16. */
if (parse_mode & NDS32_PARSE_INSN16)
{
if (pfd->hw_res == HW_GPR)
{
int_value =
__GF (insn, pfd->bitpos, pfd->bitsize) << pfd->shift;
/* push25/pop25. */
if ((opc->value == 0xfc00) || (opc->value == 0xfc80))
{
if (int_value == 0)
int_value = 6;
else
int_value = (6 + (0x01 << int_value));
push25gpr = int_value;
}
else if (strcmp (pfd->name, "rt4") == 0)
{
int_value = nds32_r45map[int_value];
}
func (stream, "$%s", keyword_gpr[int_value].name);
}
else if ((pfd->hw_res == HW_INT) || (pfd->hw_res == HW_UINT))
{
if (pfd->hw_res == HW_INT)
int_value =
N32_IMMS ((insn >> pfd->bitpos),
pfd->bitsize) << pfd->shift;
else
int_value =
__GF (insn, pfd->bitpos, pfd->bitsize) << pfd->shift;
/* movpi45. */
if (opc->value == 0xfa00)
{
int_value += 16;
func (stream, "#0x%x", int_value);
}
/* lwi45.fe. */
else if (opc->value == 0xb200)
{
int_value = 0 - (128 - int_value);
func (stream, "#%d", int_value);
}
/* beqz38/bnez38/beqs38/bnes38/j8/beqzs8/bnezs8/ifcall9. */
else if ((opc->value == 0xc000) || (opc->value == 0xc800)
|| (opc->value == 0xd000) || (opc->value == 0xd800)
|| (opc->value == 0xd500) || (opc->value == 0xe800)
|| (opc->value == 0xe900)
|| (opc->value == 0xf800))
{
info->print_address_func (int_value + pc, info);
}
/* push25/pop25. */
else if ((opc->value == 0xfc00) || (opc->value == 0xfc80))
{
func (stream, "#%d ! {$r6", int_value);
if (push25gpr != 6)
func (stream, "~$%s", keyword_gpr[push25gpr].name);
func (stream, ", $fp, $gp, $lp}");
}
/* ex9.it. */
else if ((opc->value == 0xdd40) || (opc->value == 0xea00))
{
func (stream, "#%d", int_value);
nds32_ex9_info (pc, info, int_value);
}
else if (pfd->hw_res == HW_INT)
{
if (int_value < 10)
func (stream, "#%d", int_value);
else
func (stream, "#0x%x", int_value);
}
else /* if (pfd->hw_res == HW_UINT). */
{
if (int_value < 10)
func (stream, "#%u", int_value);
else
func (stream, "#0x%x", int_value);
}
}
}
/* for audio-ext. */
else if (op == N32_OP6_AEXT)
{
nds32_parse_audio_ext (pfd, info, insn);
}
/* for insn-32. */
else if (pfd->hw_res < _HW_LAST)
{
int_value =
__GF (insn, pfd->bitpos, pfd->bitsize) << pfd->shift;
psys_reg = (keyword_t*) keywords[pfd->hw_res];
psys_reg = nds32_find_reg_keyword (psys_reg, int_value);
/* For HW_SR, dump the index when it can't
map the register name. */
if (!psys_reg && pfd->hw_res == HW_SR)
func (stream, "%d", int_value);
else if (!psys_reg)
func (stream, "???");
else
{
if (pfd->hw_res == HW_GPR || pfd->hw_res == HW_CPR
|| pfd->hw_res == HW_FDR || pfd->hw_res == HW_FSR
|| pfd->hw_res == HW_DXR || pfd->hw_res == HW_SR
|| pfd->hw_res == HW_USR)
func (stream, "$%s", psys_reg->name);
else if (pfd->hw_res == HW_DTITON
|| pfd->hw_res == HW_DTITOFF)
func (stream, ".%s", psys_reg->name);
else
func (stream, "%s", psys_reg->name);
}
}
else if ((pfd->hw_res == HW_INT) || (pfd->hw_res == HW_UINT))
{
if (pfd->hw_res == HW_INT)
int_value =
N32_IMMS ((insn >> pfd->bitpos), pfd->bitsize) << pfd->shift;
else
int_value =
__GF (insn, pfd->bitpos, pfd->bitsize) << pfd->shift;
if ((op == N32_OP6_BR1) || (op == N32_OP6_BR2))
{
info->print_address_func (int_value + pc, info);
}
else if ((op == N32_OP6_BR3) && (pfd->bitpos == 0))
{
info->print_address_func (int_value + pc, info);
}
else if (op == N32_OP6_JI)
{
/* FIXME: Handle relocation. */
if (info->flags & INSN_HAS_RELOC)
pc = 0;
/* Check if insn32 in ex9 table. */
if (parse_mode & NDS32_PARSE_EX9IT)
info->print_address_func ((pc & 0xFE000000) | int_value,
info);
/* Check if decode ex9 table, PC(31,25)|Inst(23,0)<<1. */
else if (parse_mode & NDS32_PARSE_EX9TAB)
func (stream, "PC(31,25)|#0x%x", int_value);
else
info->print_address_func (int_value + pc, info);
}
else if (op == N32_OP6_LSMW)
{
/* lmw.adm/smw.adm. */
func (stream, "#0x%x ! {", int_value);
lsmwEnb4 = int_value;
lsmwRb = ((insn >> 20) & 0x1F);
lsmwRe = ((insn >> 10) & 0x1F);
/* If [Rb, Re] specifies at least one register,
Rb(4,0) <= Re(4,0) and 0 <= Rb(4,0), Re(4,0) < 28.
Disassembling does not consider this currently because of
the convience comparing with bsp320. */
if (lsmwRb != 31 || lsmwRe != 31)
{
func (stream, "$%s", keyword_gpr[lsmwRb].name);
if (lsmwRb != lsmwRe)
func (stream, "~$%s", keyword_gpr[lsmwRe].name);
ifthe1st = 0;
}
if (lsmwEnb4 != 0)
{
/* $fp, $gp, $lp, $sp. */
checkbit = 0x08;
for (i = 0; i < 4; i++)
{
if (lsmwEnb4 & checkbit)
{
if (ifthe1st == 1)
{
ifthe1st = 0;
func (stream, "$%s", keyword_gpr[28 + i].name);
}
else
func (stream, ", $%s", keyword_gpr[28 + i].name);
}
checkbit >>= 1;
}
}
func (stream, "}");
}
else if (pfd->hw_res == HW_INT)
{
if (int_value < 10)
func (stream, "#%d", int_value);
else
func (stream, "#0x%x", int_value);
}
else /* if (pfd->hw_res == HW_UINT). */
{
if (int_value < 10)
func (stream, "#%u", int_value);
else
func (stream, "#0x%x", int_value);
}
}
break;
case '{':
case '}':
pstr_src++;
break;
case ',':
func (stream, ", ");
pstr_src++;
break;
case '+':
func (stream, " + ");
pstr_src++;
break;
case '<':
if (pstr_src[1] == '<')
{
func (stream, " << ");
pstr_src += 2;
}
else
{
func (stream, " <");
pstr_src++;
}
break;
default:
func (stream, "%c", *pstr_src++);
break;
}
}
}
/* Filter instructions with some bits must be fixed. */
static void
nds32_filter_unknown_insn (uint32_t insn, struct nds32_opcode **opc)
{
if (!(*opc))
return;
switch ((*opc)->value)
{
case JREG (JR):
case JREG (JRNEZ):
/* jr jr.xtoff */
if (__GF (insn, 6, 2) != 0 || __GF (insn, 15, 10) != 0)
*opc = NULL;
break;
case MISC (STANDBY):
if (__GF (insn, 7, 18) != 0)
*opc = NULL;
break;
case SIMD (PBSAD):
case SIMD (PBSADA):
if (__GF (insn, 5, 5) != 0)
*opc = NULL;
break;
case BR2 (IFCALL):
if (__GF (insn, 20, 5) != 0)
*opc = NULL;
break;
case JREG (JRAL):
if (__GF (insn, 5, 3) != 0 || __GF (insn, 15, 5) != 0)
*opc = NULL;
break;
case ALU1 (NOR):
case ALU1 (SLT):
case ALU1 (SLTS):
case ALU1 (SLLI):
case ALU1 (SRLI):
case ALU1 (SRAI):
case ALU1 (ROTRI):
case ALU1 (SLL):
case ALU1 (SRL):
case ALU1 (SRA):
case ALU1 (ROTR):
case ALU1 (SEB):
case ALU1 (SEH):
case ALU1 (ZEH):
case ALU1 (WSBH):
case ALU1 (SVA):
case ALU1 (SVS):
case ALU1 (CMOVZ):
case ALU1 (CMOVN):
if (__GF (insn, 5, 5) != 0)
*opc = NULL;
break;
case MISC (IRET):
case MISC (ISB):
case MISC (DSB):
if (__GF (insn, 5, 20) != 0)
*opc = NULL;
break;
}
}
static void
print_insn32 (bfd_vma pc, disassemble_info *info, uint32_t insn,
uint32_t parse_mode)
{
/* Get the final correct opcode and parse. */
struct nds32_opcode *opc;
uint32_t opcode = nds32_mask_opcode (insn);
opc = (struct nds32_opcode *) htab_find (opcode_htab, &opcode);
nds32_special_opcode (insn, &opc);
nds32_filter_unknown_insn (insn, &opc);
nds32_parse_opcode (opc, pc, info, insn, parse_mode);
}
static void
print_insn16 (bfd_vma pc, disassemble_info *info,
uint32_t insn, uint32_t parse_mode)
{
struct nds32_opcode *opc;
uint32_t opcode;
/* Get highest 7 bit in default. */
unsigned int mask = 0xfe00;
/* Classify 16-bit instruction to 4 sets by bit 13 and 14. */
switch (__GF (insn, 13, 2))
{
case 0x0:
/* mov55 movi55 */
if (__GF (insn, 11, 2) == 0)
{
mask = 0xfc00;
/* ifret16 = mov55 $sp, $sp*/
if (__GF (insn, 0, 11) == 0x3ff)
mask = 0xffff;
}
else if (__GF (insn, 9, 4) == 0xb)
mask = 0xfe07;
break;
case 0x1:
/* lwi37 swi37 */
if (__GF (insn, 11, 2) == 0x3)
mask = 0xf880;
break;
case 0x2:
mask = 0xf800;
/* Exclude beqz38, bnez38, beqs38, and bnes38. */
if (__GF (insn, 12, 1) == 0x1
&& __GF (insn, 8, 3) == 0x5)
{
if (__GF (insn, 11, 1) == 0x0)
mask = 0xff00;
else
mask = 0xffe0;
}
break;
case 0x3:
switch (__GF (insn, 11, 2))
{
case 0x1:
/* beqzs8 bnezs8 */
if (__GF (insn, 9, 2) == 0x0)
mask = 0xff00;
/* addi10s */
else if (__GF(insn, 10, 1) == 0x1)
mask = 0xfc00;
break;
case 0x2:
/* lwi37.sp swi37.sp */
mask = 0xf880;
break;
case 0x3:
if (__GF (insn, 8, 3) == 0x5)
mask = 0xff00;
else if (__GF (insn, 8, 3) == 0x4)
mask = 0xff80;
else if (__GF (insn, 9 , 2) == 0x3)
mask = 0xfe07;
break;
}
break;
}
opcode = insn & mask;
opc = (struct nds32_opcode *) htab_find (opcode_htab, &opcode);
nds32_special_opcode (insn, &opc);
/* Get the final correct opcode and parse it. */
nds32_parse_opcode (opc, pc, info, insn, parse_mode);
}
static hashval_t
htab_hash_hash (const void *p)
{
return (*(unsigned int *) p) % 49;
}
static int
htab_hash_eq (const void *p, const void *q)
{
uint32_t pinsn = ((struct nds32_opcode *) p)->value;
uint32_t qinsn = *((uint32_t *) q);
return (pinsn == qinsn);
}
/* Get the format of instruction. */
static uint32_t
nds32_mask_opcode (uint32_t insn)
{
uint32_t opcode = N32_OP6 (insn);
switch (opcode)
{
case N32_OP6_LBI:
case N32_OP6_LHI:
case N32_OP6_LWI:
case N32_OP6_LDI:
case N32_OP6_LBI_BI:
case N32_OP6_LHI_BI:
case N32_OP6_LWI_BI:
case N32_OP6_LDI_BI:
case N32_OP6_SBI:
case N32_OP6_SHI:
case N32_OP6_SWI:
case N32_OP6_SDI:
case N32_OP6_SBI_BI:
case N32_OP6_SHI_BI:
case N32_OP6_SWI_BI:
case N32_OP6_SDI_BI:
case N32_OP6_LBSI:
case N32_OP6_LHSI:
case N32_OP6_LWSI:
case N32_OP6_LBSI_BI:
case N32_OP6_LHSI_BI:
case N32_OP6_LWSI_BI:
case N32_OP6_MOVI:
case N32_OP6_SETHI:
case N32_OP6_ADDI:
case N32_OP6_SUBRI:
case N32_OP6_ANDI:
case N32_OP6_XORI:
case N32_OP6_ORI:
case N32_OP6_SLTI:
case N32_OP6_SLTSI:
case N32_OP6_CEXT:
case N32_OP6_BITCI:
return MASK_OP (insn, 0);
case N32_OP6_ALU2:
/* FFBI */
if (__GF (insn, 0, 7) == (N32_ALU2_FFBI | __BIT (6)))
return MASK_OP (insn, 0x7f);
else if (__GF (insn, 0, 7) == (N32_ALU2_MFUSR | __BIT (6))
|| __GF (insn, 0, 7) == (N32_ALU2_MTUSR | __BIT (6)))
/* RDOV CLROV */
return MASK_OP (insn, 0xf81ff);
return MASK_OP (insn, 0x1ff);
case N32_OP6_ALU1:
case N32_OP6_SIMD:
return MASK_OP (insn, 0x1f);
case N32_OP6_MEM:
return MASK_OP (insn, 0xff);
case N32_OP6_JREG:
return MASK_OP (insn, 0x7f);
case N32_OP6_LSMW:
return MASK_OP (insn, 0x23);
case N32_OP6_SBGP:
case N32_OP6_LBGP:
return MASK_OP (insn, 0x1 << 19);
case N32_OP6_HWGP:
if (__GF (insn, 18, 2) == 0x3)
return MASK_OP (insn, 0x7 << 17);
return MASK_OP (insn, 0x3 << 18);
case N32_OP6_DPREFI:
return MASK_OP (insn, 0x1 << 24);
case N32_OP6_LWC:
case N32_OP6_SWC:
case N32_OP6_LDC:
case N32_OP6_SDC:
return MASK_OP (insn, 0x1 << 12);
case N32_OP6_JI:
return MASK_OP (insn, 0x1 << 24);
case N32_OP6_BR1:
return MASK_OP (insn, 0x1 << 14);
case N32_OP6_BR2:
return MASK_OP (insn, 0xf << 16);
case N32_OP6_BR3:
return MASK_OP (insn, 0x1 << 19);
case N32_OP6_MISC:
switch (__GF (insn, 0, 5))
{
case N32_MISC_MTSR:
/* SETGIE and SETEND */
if (__GF (insn, 5, 5) == 0x1 || __GF (insn, 5, 5) == 0x2)
return MASK_OP (insn, 0x1fffff);
return MASK_OP (insn, 0x1f);
case N32_MISC_TLBOP:
if (__GF (insn, 5, 5) == 5 || __GF (insn, 5, 5) == 7)
/* PB FLUA */
return MASK_OP (insn, 0x3ff);
return MASK_OP (insn, 0x1f);
default:
return MASK_OP (insn, 0x1f);
}
case N32_OP6_COP:
if (__GF (insn, 4, 2) == 0)
{
/* FPU */
switch (__GF (insn, 0, 4))
{
case 0x0:
case 0x8:
/* FS1/F2OP FD1/F2OP */
if (__GF (insn, 6, 4) == 0xf)
return MASK_OP (insn, 0x7fff);
/* FS1 FD1 */
return MASK_OP (insn, 0x3ff);
case 0x4:
case 0xc:
/* FS2 */
return MASK_OP (insn, 0x3ff);
case 0x1:
case 0x9:
/* XR */
if (__GF (insn, 6, 4) == 0xc)
return MASK_OP (insn, 0x7fff);
/* MFCP MTCP */
return MASK_OP (insn, 0x3ff);
default:
return MASK_OP (insn, 0xff);
}
}
else if (__GF (insn, 0, 2) == 0)
return MASK_OP (insn, 0xf);
return MASK_OP (insn, 0xcf);
case N32_OP6_AEXT:
/* AUDIO */
switch (__GF (insn, 23, 2))
{
case 0x0:
if (__GF (insn, 5, 4) == 0)
/* AMxxx AMAyyS AMyyS AMAWzS AMWzS */
return MASK_OP (insn, (0x1f << 20) | 0x1ff);
else if (__GF (insn, 5, 4) == 1)
/* ALR ASR ALA ASA AUPI */
return MASK_OP (insn, (0x1f << 20) | (0xf << 5));
else if (__GF (insn, 20, 3) == 0 && __GF (insn, 6, 3) == 1)
/* ALR2 */
return MASK_OP (insn, (0x1f << 20) | (0x7 << 6));
else if (__GF (insn, 20 ,3) == 2 && __GF (insn, 6, 3) == 1)
/* AWEXT ASATS48 */
return MASK_OP (insn, (0x1f << 20) | (0xf << 5));
else if (__GF (insn, 20 ,3) == 3 && __GF (insn, 6, 3) == 1)
/* AMTAR AMTAR2 AMFAR AMFAR2 */
return MASK_OP (insn, (0x1f << 20) | (0x1f << 5));
else if (__GF (insn, 7, 2) == 3)
/* AMxxxSA */
return MASK_OP (insn, (0x1f << 20) | (0x3 << 7));
else if (__GF (insn, 6, 3) == 2)
/* AMxxxL.S */
return MASK_OP (insn, (0x1f << 20) | (0xf << 5));
else
/* AmxxxL.l AmxxxL2.S AMxxxL2.L */
return MASK_OP (insn, (0x1f << 20) | (0x7 << 6));
case 0x1:
if (__GF (insn, 20, 3) == 0)
/* AADDL ASUBL */
return MASK_OP (insn, (0x1f << 20) | (0x1 << 5));
else if (__GF (insn, 20, 3) == 1)
/* AMTARI Ix AMTARI Mx */
return MASK_OP (insn, (0x1f << 20));
else if (__GF (insn, 6, 3) == 2)
/* AMAWzSl.S AMWzSl.S */
return MASK_OP (insn, (0x1f << 20) | (0xf << 5));
else if (__GF (insn, 7, 2) == 3)
/* AMAWzSSA AMWzSSA */
return MASK_OP (insn, (0x1f << 20) | (0x3 << 7));
else
/* AMAWzSL.L AMAWzSL2.S AMAWzSL2.L AMWzSL.L AMWzSL.L AMWzSL2.S */
return MASK_OP (insn, (0x1f << 20) | (0x7 << 6));
case 0x2:
if (__GF (insn, 6, 3) == 2)
/* AMAyySl.S AMWyySl.S */
return MASK_OP (insn, (0x1f << 20) | (0xf << 5));
else if (__GF (insn, 7, 2) == 3)
/* AMAWyySSA AMWyySSA */
return MASK_OP (insn, (0x1f << 20) | (0x3 << 7));
else
/* AMAWyySL.L AMAWyySL2.S AMAWyySL2.L AMWyySL.L AMWyySL.L AMWyySL2.S */
return MASK_OP (insn, (0x1f << 20) | (0x7 << 6));
}
return MASK_OP (insn, 0x1f << 20);
default:
return (1 << 31);
}
}
/* Define cctl subtype. */
static char *cctl_subtype [] =
{
/* 0x0 */
"st0", "st0", "st0", "st2", "st2", "st3", "st3", "st4",
"st1", "st1", "st1", "st0", "st0", NULL, NULL, "st5",
/* 0x10 */
"st0", NULL, NULL, "st2", "st2", "st3", "st3", NULL,
"st1", NULL, NULL, "st0", "st0", NULL, NULL, NULL
};
/* Check the subset of opcode. */
static void
nds32_special_opcode (uint32_t insn, struct nds32_opcode **opc)
{
char *string = NULL;
uint32_t op;
if (!(*opc))
return;
/* Check if special case. */
switch ((*opc)->value)
{
case OP6 (LWC):
case OP6 (SWC):
case OP6 (LDC):
case OP6 (SDC):
case FPU_RA_IMMBI (LWC):
case FPU_RA_IMMBI (SWC):
case FPU_RA_IMMBI (LDC):
case FPU_RA_IMMBI (SDC):
/* Check if cp0 => FPU. */
if (__GF (insn, 13, 2) == 0)
{
while (!((*opc)->attr & ATTR (FPU)) && (*opc)->next)
*opc = (*opc)->next;
}
break;
case ALU1 (ADD):
case ALU1 (SUB):
case ALU1 (AND):
case ALU1 (XOR):
case ALU1 (OR):
/* Check if (add/add_slli) (sub/sub_slli) (and/and_slli). */
if (N32_SH5(insn) != 0)
string = "sh";
break;
case ALU1 (SRLI):
/* Check if nop. */
if (__GF (insn, 10, 15) == 0)
string = "nop";
break;
case MISC (CCTL):
string = cctl_subtype [__GF (insn, 5, 5)];
break;
case JREG (JR):
case JREG (JRAL):
case JREG (JR) | JREG_RET:
if (__GF (insn, 8, 2) != 0)
string = "tit";
break;
case N32_OP6_COP:
break;
case 0xea00:
/* break16 ex9 */
if (__GF (insn, 5, 4) != 0)
string = "ex9";
break;
case 0x9200:
/* nop16 */
if (__GF (insn, 0, 9) == 0)
string = "nop16";
break;
}
if (string)
{
while (strstr ((*opc)->opcode, string) == NULL
&& strstr ((*opc)->instruction, string) == NULL && (*opc)->next)
*opc = (*opc)->next;
return;
}
/* Classify instruction is COP or FPU. */
op = N32_OP6 (insn);
if (op == N32_OP6_COP && __GF (insn, 4, 2) != 0)
{
while (((*opc)->attr & ATTR (FPU)) != 0 && (*opc)->next)
*opc = (*opc)->next;
}
}
int
print_insn_nds32 (bfd_vma pc, disassemble_info *info)
{
int status;
bfd_byte buf[4];
uint32_t insn;
static int init = 1;
int i = 0;
struct nds32_opcode *opc;
struct nds32_opcode **slot;
if (init)
{
/* Build opcode table. */
opcode_htab = htab_create_alloc (1024, htab_hash_hash, htab_hash_eq,
NULL, xcalloc, free);
while (nds32_opcodes[i].opcode != NULL)
{
opc = &nds32_opcodes[i];
slot =
(struct nds32_opcode **) htab_find_slot (opcode_htab, &opc->value,
INSERT);
if (*slot == NULL)
{
/* This is the new one. */
*slot = opc;
}
else
{
/* Already exists. Append to the list. */
opc = *slot;
while (opc->next)
opc = opc->next;
opc->next = &nds32_opcodes[i];
}
i++;
}
init = 0;
}
status = info->read_memory_func (pc, (bfd_byte *) buf, 4, info);
if (status)
{
/* for the last 16-bit instruction. */
status = info->read_memory_func (pc, (bfd_byte *) buf, 2, info);
if (status)
{
(*info->memory_error_func)(status, pc, info);
return -1;
}
}
insn = bfd_getb32 (buf);
/* 16-bit instruction. */
if (insn & 0x80000000)
{
if (info->section && strstr (info->section->name, ".ex9.itable") != NULL)
{
print_insn16 (pc, info, (insn & 0x0000FFFF),
NDS32_PARSE_INSN16 | NDS32_PARSE_EX9TAB);
return 4;
}
print_insn16 (pc, info, (insn >> 16), NDS32_PARSE_INSN16);
return 2;
}
/* 32-bit instructions. */
else
{
if (info->section
&& strstr (info->section->name, ".ex9.itable") != NULL)
print_insn32 (pc, info, insn, NDS32_PARSE_INSN32 | NDS32_PARSE_EX9TAB);
else
print_insn32 (pc, info, insn, NDS32_PARSE_INSN32);
return 4;
}
}
|