opcodes/w65-dis.c

   1 /* Disassemble WDC 65816 instructions.
   2    Copyright 1995, 1998, 2000, 2001, 2002 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
  30 static void print_operand PARAMS ((int, char *, unsigned int *));
  31
  32 #if 0
  33 static char *lname[] = { "r0","r1","r2","r3","r4","r5","r6","r7","s0" };
  34
  35 static char *
  36 findname (val)
  37      unsigned int val;
  38 {
  39   if (val >= 0x10 && val <= 0x20)
  40     return lname[(val - 0x10) / 2];
  41   return 0;
  42 }
  43 #endif
  44 static void
  45 print_operand (lookup, format, args)
  46      int lookup;
  47      char *format;
  48      unsigned int *args;
  49 {
  50   int val;
  51   int c;
  52
  53   while (*format)
  54     {
  55       switch (c = *format++)
  56         {
  57         case '$':
  58           val = args[(*format++) - '0'];
  59           if (lookup)
  60             {
  61 #if 0
  62               name = findname (val);
  63               if (name)
  64                 fpr (stream, "%s", name);
  65               else
  66 #endif
  67                 local_info->print_address_func (val, local_info);
  68             }
  69           else
  70             fpr (stream, "0x%x", val);
  71
  72           break;
  73         default:
  74           fpr (stream, "%c", c);
  75           break;
  76         }
  77     }
  78 }
  79
  80 int
  81 print_insn_w65 (memaddr, info)
  82      bfd_vma memaddr;
  83      struct disassemble_info *info;
  84 {
  85   int status = 0;
  86   unsigned char insn[4];
  87   const struct opinfo *op;
  88   int i;
  89   int X = 0;
  90   int M = 0;
  91   int args[2];
  92   stream = info->stream;
  93   fpr = info->fprintf_func;
  94   local_info = info;
  95   for (i = 0; i < 4 && status == 0; i++)
  96     {
  97       status = info->read_memory_func (memaddr + i, insn + i, 1, info);
  98     }
  99
 100   for (op = optable; op->val != insn[0]; op++)
 101     ;
 102
 103   fpr (stream, "%s", op->name);
 104
 105   /* Prepare all the posible operand values.  */
 106   {
 107     int size = 1;
 108     int asR_W65_ABS8 = insn[1];
 109     int asR_W65_ABS16 = (insn[2] << 8) + asR_W65_ABS8;
 110     int asR_W65_ABS24 = (insn[3] << 16) + asR_W65_ABS16;
 111     int asR_W65_PCR8 = ((char) (asR_W65_ABS8)) + memaddr + 2;
 112     int asR_W65_PCR16 = ((short) (asR_W65_ABS16)) + memaddr + 3;
 113
 114     switch (op->amode)
 115       {
 116         DISASM ();
 117       }
 118
 119     return size;
 120   }
 121 }