| 1 | /* Disassemble WDC 65816 instructions. |
| 2 | Copyright (C) 1995, 1998 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 | #define STATIC_TABLE |
| 20 | #define DEFINE_TABLE |
| 21 | |
| 22 | #include "w65-opc.h" |
| 23 | #include "dis-asm.h" |
| 24 | |
| 25 | static fprintf_ftype fpr; |
| 26 | static void *stream; |
| 27 | static struct disassemble_info *local_info; |
| 28 | #if 0 |
| 29 | static char *lname[] = {"r0","r1","r2","r3","r4","r5","r6","r7","s0"}; |
| 30 | |
| 31 | static char *findname (val) |
| 32 | unsigned int val; |
| 33 | { |
| 34 | if (val >= 0x10 && val <= 0x20) |
| 35 | return lname[(val - 0x10) / 2]; |
| 36 | return 0; |
| 37 | } |
| 38 | #endif |
| 39 | static void |
| 40 | print_operand (lookup, format, args) |
| 41 | int lookup; |
| 42 | char *format; |
| 43 | unsigned int *args; |
| 44 | { |
| 45 | int val; |
| 46 | int c; |
| 47 | |
| 48 | while (*format) |
| 49 | { |
| 50 | switch ( c = *format++) |
| 51 | { |
| 52 | case '$': |
| 53 | val = args[(*format++) - '0']; |
| 54 | if (lookup) |
| 55 | { |
| 56 | #if 0 |
| 57 | name = findname(val); |
| 58 | if (name) |
| 59 | fpr(stream, "%s", name); |
| 60 | else |
| 61 | #endif |
| 62 | local_info->print_address_func (val, local_info); |
| 63 | } |
| 64 | else |
| 65 | fpr (stream, "0x%x", val); |
| 66 | |
| 67 | break; |
| 68 | default: |
| 69 | fpr(stream,"%c", c); |
| 70 | break; |
| 71 | } |
| 72 | } |
| 73 | } |
| 74 | int |
| 75 | print_insn_w65(memaddr, info) |
| 76 | bfd_vma memaddr; |
| 77 | struct disassemble_info *info; |
| 78 | { |
| 79 | |
| 80 | |
| 81 | int status = 0; |
| 82 | unsigned char insn[4]; |
| 83 | register struct opinfo *op; |
| 84 | int i; |
| 85 | int X =0; |
| 86 | int M = 0; |
| 87 | int args[2]; |
| 88 | stream = info->stream; |
| 89 | fpr = info->fprintf_func; |
| 90 | local_info = info; |
| 91 | for (i = 0; i <4 && status == 0; i++) |
| 92 | { |
| 93 | status = info->read_memory_func(memaddr+i, insn + i, 1, info); |
| 94 | } |
| 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 | DISASM(); |
| 113 | } |
| 114 | |
| 115 | return size; |
| 116 | } |
| 117 | |
| 118 | } |