opcodes/w65-dis.c

   1 /* Disassemble WDC 65816 instructions.
   2    Copyright (C) 1995, 1998, 2000 Free Software Foundation, Inc.
   3
   4 This program is free software; you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation; either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 #include <stdio.h>
  19 #include "sysdep.h"
  20 #define STATIC_TABLE
  21 #define DEFINE_TABLE
  22
  23 #include "w65-opc.h"
  24 #include "dis-asm.h"
  25
  26 static fprintf_ftype fpr;
  27 static void *stream;
  28 static struct disassemble_info *local_info;
  29 #if 0
  30 static char *lname[] = { "r0","r1","r2","r3","r4","r5","r6","r7","s0" };
  31
  32 static char *
  33 findname (val)
  34      unsigned int val;
  35 {
  36   if (val >= 0x10 && val <= 0x20)
  37     return lname[(val - 0x10) / 2];
  38   return 0;
  39 }
  40 #endif
  41 static void
  42 print_operand (lookup, format, args)
  43      int lookup;
  44      char *format;
  45      unsigned int *args;
  46 {
  47   int val;
  48   int c;
  49
  50   while (*format)
  51     {
  52       switch (c = *format++)
  53         {
  54         case '$':
  55           val = args[(*format++) - '0'];
  56           if (lookup)
  57             {
  58 #if 0
  59               name = findname (val);
  60               if (name)
  61                 fpr (stream, "%s", name);
  62               else
  63 #endif
  64                 local_info->print_address_func (val, local_info);
  65             }
  66           else
  67             fpr (stream, "0x%x", val);
  68
  69           break;
  70         default:
  71           fpr (stream, "%c", c);
  72           break;
  73         }
  74     }
  75 }
  76
  77 int
  78 print_insn_w65 (memaddr, info)
  79      bfd_vma memaddr;
  80      struct disassemble_info *info;
  81 {
  82   int status = 0;
  83   unsigned char insn[4];
  84   register struct opinfo *op;
  85   int i;
  86   int X = 0;
  87   int M = 0;
  88   int args[2];
  89   stream = info->stream;
  90   fpr = info->fprintf_func;
  91   local_info = info;
  92   for (i = 0; i < 4 && status == 0; i++)
  93     {
  94       status = info->read_memory_func (memaddr + i, insn + i, 1, info);
  95     }
  96
  97   for (op = optable; op->val != insn[0]; op++)
  98     ;
  99
 100   fpr (stream, "%s", op->name);
 101
 102   /* Prepare all the posible operand values.  */
 103   {
 104     int size = 1;
 105     int asR_W65_ABS8 = insn[1];
 106     int asR_W65_ABS16 = (insn[2] << 8) + asR_W65_ABS8;
 107     int asR_W65_ABS24 = (insn[3] << 16) + asR_W65_ABS16;
 108     int asR_W65_PCR8 = ((char) (asR_W65_ABS8)) + memaddr + 2;
 109     int asR_W65_PCR16 = ((short) (asR_W65_ABS16)) + memaddr + 3;
 110
 111     switch (op->amode)
 112       {
 113         DISASM ();
 114       }
 115
 116     return size;
 117   }
 118 }