opcodes/w65-dis.c

   1 /* Disassemble WDC 65816 instructions.
   2    Copyright 1995, 1998, 2000, 2001, 2002, 2005
   3    Free Software Foundation, Inc.
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 #include <stdio.h>
  20 #include "sysdep.h"
  21 #define STATIC_TABLE
  22 #define DEFINE_TABLE
  23
  24 #include "w65-opc.h"
  25 #include "dis-asm.h"
  26
  27 static fprintf_ftype fpr;
  28 static void *stream;
  29 static struct disassemble_info *local_info;
  30
  31 static void print_operand PARAMS ((int, char *, int *));
  32
  33 #if 0
  34 static char *lname[] = { "r0","r1","r2","r3","r4","r5","r6","r7","s0" };
  35
  36 static char *
  37 findname (val)
  38      unsigned int val;
  39 {
  40   if (val >= 0x10 && val <= 0x20)
  41     return lname[(val - 0x10) / 2];
  42   return 0;
  43 }
  44 #endif
  45 static void
  46 print_operand (lookup, format, args)
  47      int lookup;
  48      char *format;
  49      int *args;
  50 {
  51   int val;
  52   int c;
  53
  54   while (*format)
  55     {
  56       switch (c = *format++)
  57         {
  58         case '$':
  59           val = args[(*format++) - '0'];
  60           if (lookup)
  61             {
  62 #if 0
  63               name = findname (val);
  64               if (name)
  65                 fpr (stream, "%s", name);
  66               else
  67 #endif
  68                 local_info->print_address_func (val, local_info);
  69             }
  70           else
  71             fpr (stream, "0x%x", val);
  72
  73           break;
  74         default:
  75           fpr (stream, "%c", c);
  76           break;
  77         }
  78     }
  79 }
  80
  81 int
  82 print_insn_w65 (memaddr, info)
  83      bfd_vma memaddr;
  84      struct disassemble_info *info;
  85 {
  86   int status = 0;
  87   unsigned char insn[4];
  88   const struct opinfo *op;
  89   int i;
  90   int X = 0;
  91   int M = 0;
  92   int args[2];
  93   stream = info->stream;
  94   fpr = info->fprintf_func;
  95   local_info = info;
  96   for (i = 0; i < 4 && status == 0; i++)
  97     {
  98       status = info->read_memory_func (memaddr + i, insn + i, 1, info);
  99     }
 100
 101   for (op = optable; op->val != insn[0]; op++)
 102     ;
 103
 104   fpr (stream, "%s", op->name);
 105
 106   /* Prepare all the posible operand values.  */
 107   {
 108     int size = 1;
 109     int asR_W65_ABS8 = insn[1];
 110     int asR_W65_ABS16 = (insn[2] << 8) + asR_W65_ABS8;
 111     int asR_W65_ABS24 = (insn[3] << 16) + asR_W65_ABS16;
 112     int asR_W65_PCR8 = ((char) (asR_W65_ABS8)) + memaddr + 2;
 113     int asR_W65_PCR16 = ((short) (asR_W65_ABS16)) + memaddr + 3;
 114
 115     switch (op->amode)
 116       {
 117         DISASM ();
 118       }
 119
 120     return size;
 121   }
 122 }