opcodes/csky-dis.c

   1 /* C-SKY disassembler.
   2    Copyright (C) 1988-2018 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 <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 }