opcodes/rl78-dis.c

   1 /* Disassembler code for Renesas RL78.
   2    Copyright (C) 2011-2015 Free Software Foundation, Inc.
   3    Contributed by Red Hat.
   4    Written by DJ Delorie.
   5
   6    This file is part of the GNU opcodes library.
   7
   8    This library is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3, or (at your option)
  11    any later version.
  12
  13    It is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include <stdio.h>
  25
  26 #include "bfd.h"
  27 #include "dis-asm.h"
  28 #include "opcode/rl78.h"
  29
  30 #define DEBUG_SEMANTICS 0
  31
  32 typedef struct
  33 {
  34   bfd_vma pc;
  35   disassemble_info * dis;
  36 } RL78_Data;
  37
  38 static int
  39 rl78_get_byte (void * vdata)
  40 {
  41   bfd_byte buf[1];
  42   RL78_Data *rl78_data = (RL78_Data *) vdata;
  43
  44   rl78_data->dis->read_memory_func (rl78_data->pc,
  45                                   buf,
  46                                   1,
  47                                   rl78_data->dis);
  48
  49   rl78_data->pc ++;
  50   return buf[0];
  51 }
  52
  53 static char const *
  54 register_names[] =
  55 {
  56   "",
  57   "x", "a", "c", "b", "e", "d", "l", "h",
  58   "ax", "bc", "de", "hl",
  59   "sp", "psw", "cs", "es", "pmc", "mem"
  60 };
  61
  62 static char const *
  63 condition_names[] =
  64 {
  65   "t", "f", "c", "nc", "h", "nh", "z", "nz"
  66 };
  67
  68 static int
  69 indirect_type (int t)
  70 {
  71   switch (t)
  72     {
  73     case RL78_Operand_Indirect:
  74     case RL78_Operand_BitIndirect:
  75     case RL78_Operand_PostInc:
  76     case RL78_Operand_PreDec:
  77       return 1;
  78     default:
  79       return 0;
  80     }
  81 }
  82
  83 int
  84 print_insn_rl78 (bfd_vma addr, disassemble_info * dis)
  85 {
  86   int rv;
  87   RL78_Data rl78_data;
  88   RL78_Opcode_Decoded opcode;
  89   const char * s;
  90 #if DEBUG_SEMANTICS
  91   static char buf[200];
  92 #endif
  93
  94   rl78_data.pc = addr;
  95   rl78_data.dis = dis;
  96
  97   rv = rl78_decode_opcode (addr, &opcode, rl78_get_byte, &rl78_data);
  98
  99   dis->bytes_per_line = 10;
 100
 101 #define PR (dis->fprintf_func)
 102 #define PS (dis->stream)
 103 #define PC(c) PR (PS, "%c", c)
 104
 105   s = opcode.syntax;
 106
 107 #if DEBUG_SEMANTICS
 108
 109   switch (opcode.id)
 110     {
 111     case RLO_unknown: s = "uknown"; break;
 112     case RLO_add: s = "add: %e0%0 += %e1%1"; break;
 113     case RLO_addc: s = "addc: %e0%0 += %e1%1 + CY"; break;
 114     case RLO_and: s = "and: %e0%0 &= %e1%1"; break;
 115     case RLO_branch: s = "branch: pc = %e0%0"; break;
 116     case RLO_branch_cond: s = "branch_cond: pc = %e0%0 if %c1 / %e1%1"; break;
 117     case RLO_branch_cond_clear: s = "branch_cond_clear: pc = %e0%0 if %c1 / %e1%1, %e1%1 = 0"; break;
 118     case RLO_call: s = "call: pc = %e1%0"; break;
 119     case RLO_cmp: s = "cmp: %e0%0 - %e1%1"; break;
 120     case RLO_mov: s = "mov: %e0%0 = %e1%1"; break;
 121     case RLO_or: s = "or: %e0%0 |= %e1%1"; break;
 122     case RLO_rol: s = "rol: %e0%0 <<= %e1%1"; break;
 123     case RLO_rolc: s = "rol: %e0%0 <<= %e1%1,CY"; break;
 124     case RLO_ror: s = "ror: %e0%0 >>= %e1%1"; break;
 125     case RLO_rorc: s = "ror: %e0%0 >>= %e1%1,CY"; break;
 126     case RLO_sar: s = "sar: %e0%0 >>= %e1%1 signed"; break;
 127     case RLO_sel: s = "sel: rb = %1"; break;
 128     case RLO_shr: s = "shr: %e0%0 >>= %e1%1 unsigned"; break;
 129     case RLO_shl: s = "shl: %e0%0 <<= %e1%1"; break;
 130     case RLO_skip: s = "skip: if %c1"; break;
 131     case RLO_sub: s = "sub: %e0%0 -= %e1%1"; break;
 132     case RLO_subc: s = "subc: %e0%0 -= %e1%1 - CY"; break;
 133     case RLO_xch: s = "xch: %e0%0 <-> %e1%1"; break;
 134     case RLO_xor: s = "xor: %e0%0 ^= %e1%1"; break;
 135     }
 136
 137   sprintf(buf, "%s%%W%%f\t\033[32m%s\033[0m", s, opcode.syntax);
 138   s = buf;
 139
 140 #endif
 141
 142   for (; *s; s++)
 143     {
 144       if (*s != '%')
 145         {
 146           PC (*s);
 147         }
 148       else
 149         {
 150           RL78_Opcode_Operand * oper;
 151           int do_hex = 0;
 152           int do_addr = 0;
 153           int do_es = 0;
 154           int do_sfr = 0;
 155           int do_cond = 0;
 156           int do_bang = 0;
 157
 158           while (1)
 159             {
 160               s ++;
 161               switch (*s)
 162                 {
 163                 case 'x':
 164                   do_hex = 1;
 165                   break;
 166                 case '!':
 167                   do_bang = 1;
 168                   break;
 169                 case 'e':
 170                   do_es = 1;
 171                   break;
 172                 case 'a':
 173                   do_addr = 1;
 174                   break;
 175                 case 's':
 176                   do_sfr = 1;
 177                   break;
 178                 case 'c':
 179                   do_cond = 1;
 180                   break;
 181                 default:
 182                   goto no_more_modifiers;
 183                 }
 184             }
 185         no_more_modifiers:;
 186
 187           switch (*s)
 188             {
 189             case '%':
 190               PC ('%');
 191               break;
 192
 193 #if DEBUG_SEMANTICS
 194
 195             case 'W':
 196               if (opcode.size == RL78_Word)
 197                 PR (PS, " \033[33mW\033[0m");
 198               break;
 199
 200             case 'f':
 201               if (opcode.flags)
 202                 {
 203                   char *comma = "";
 204                   PR (PS, "  \033[35m");
 205
 206                   if (opcode.flags & RL78_PSW_Z)
 207                     { PR (PS, "Z"); comma = ","; }
 208                   if (opcode.flags & RL78_PSW_AC)
 209                     { PR (PS, "%sAC", comma); comma = ","; }
 210                   if (opcode.flags & RL78_PSW_CY)
 211                     { PR (PS, "%sCY", comma); comma = ","; }
 212                   PR (PS, "\033[0m");
 213                 }
 214               break;
 215
 216 #endif
 217
 218             case '0':
 219             case '1':
 220               oper = *s == '0' ? &opcode.op[0] : &opcode.op[1];
 221             if (do_es)
 222               {
 223                 if (oper->use_es && indirect_type (oper->type))
 224                   PR (PS, "es:");
 225               }
 226
 227             if (do_bang)
 228               PC ('!');
 229
 230             if (do_cond)
 231               {
 232                 PR (PS, "%s", condition_names[oper->condition]);
 233                 break;
 234               }
 235
 236             switch (oper->type)
 237               {
 238               case RL78_Operand_Immediate:
 239                 if (do_addr)
 240                   dis->print_address_func (oper->addend, dis);
 241                 else if (do_hex
 242                          || oper->addend > 999
 243                          || oper->addend < -999)
 244                   PR (PS, "%#x", oper->addend);
 245                 else
 246                   PR (PS, "%d", oper->addend);
 247                 break;
 248
 249               case RL78_Operand_Register:
 250                 PR (PS, "%s", register_names[oper->reg]);
 251                 break;
 252
 253               case RL78_Operand_Bit:
 254                 PR (PS, "%s.%d", register_names[oper->reg], oper->bit_number);
 255                 break;
 256
 257               case RL78_Operand_Indirect:
 258               case RL78_Operand_BitIndirect:
 259                 switch (oper->reg)
 260                   {
 261                   case RL78_Reg_None:
 262                     if (oper->addend == 0xffffa && do_sfr && opcode.size == RL78_Byte)
 263                       PR (PS, "psw");
 264                     else if (oper->addend == 0xffff8 && do_sfr && opcode.size == RL78_Word)
 265                       PR (PS, "sp");
 266                     else if (oper->addend >= 0xffe20)
 267                       PR (PS, "%#x", oper->addend);
 268                     else
 269                       {
 270                         int faddr = oper->addend;
 271                         if (do_es && ! oper->use_es)
 272                           faddr += 0xf0000;
 273                         dis->print_address_func (faddr, dis);
 274                       }
 275                     break;
 276
 277                   case RL78_Reg_B:
 278                   case RL78_Reg_C:
 279                   case RL78_Reg_BC:
 280                     PR (PS, "%d[%s]", oper->addend, register_names[oper->reg]);
 281                     break;
 282
 283                   default:
 284                     PR (PS, "[%s", register_names[oper->reg]);
 285                     if (oper->reg2 != RL78_Reg_None)
 286                       PR (PS, "+%s", register_names[oper->reg2]);
 287                     if (oper->addend)
 288                       PR (PS, "+%d", oper->addend);
 289                     PC (']');
 290                     break;
 291
 292                   }
 293                 if (oper->type == RL78_Operand_BitIndirect)
 294                   PR (PS, ".%d", oper->bit_number);
 295                 break;
 296
 297 #if DEBUG_SEMANTICS
 298                 /* Shouldn't happen - push and pop don't print
 299                    [SP] directly.  But we *do* use them for
 300                    semantic debugging.  */
 301               case RL78_Operand_PostInc:
 302                 PR (PS, "[%s++]", register_names[oper->reg]);
 303                 break;
 304               case RL78_Operand_PreDec:
 305                 PR (PS, "[--%s]", register_names[oper->reg]);
 306                 break;
 307 #endif
 308
 309               default:
 310                 /* If we ever print this, that means the
 311                    programmer tried to print an operand with a
 312                    type we don't expect.  Print the line and
 313                    operand number from rl78-decode.opc for
 314                    them.  */
 315                 PR (PS, "???%d.%d", opcode.lineno, *s - '0');
 316                 break;
 317               }
 318             }
 319         }
 320     }
 321
 322 #if DEBUG_SEMANTICS
 323
 324   PR (PS, "\t\033[34m(line %d)\033[0m", opcode.lineno);
 325
 326 #endif
 327
 328   return rv;
 329 }