| 1 | /* Disassemble MN10200 instructions.
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| 2 | Copyright 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software; you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 2 of the License, or
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| 7 | (at your option) any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program; if not, write to the Free Software
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| 16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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| 17 |
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| 18 |
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| 19 | #include <stdio.h>
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| 20 |
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| 21 | #include "sysdep.h"
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| 22 | #include "opcode/mn10200.h"
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| 23 | #include "dis-asm.h"
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| 24 | #include "opintl.h"
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| 25 |
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| 26 | static void disassemble PARAMS ((bfd_vma, struct disassemble_info *,
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| 27 | unsigned long insn, unsigned long,
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| 28 | unsigned int));
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| 29 |
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| 30 | int
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| 31 | print_insn_mn10200 (memaddr, info)
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| 32 | bfd_vma memaddr;
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| 33 | struct disassemble_info *info;
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| 34 | {
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| 35 | int status;
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| 36 | bfd_byte buffer[4];
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| 37 | unsigned long insn;
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| 38 | unsigned long extension = 0;
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| 39 | unsigned int consume;
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| 40 |
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| 41 | /* First figure out how big the opcode is. */
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| 42 | status = (*info->read_memory_func) (memaddr, buffer, 1, info);
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| 43 | if (status != 0)
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| 44 | {
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| 45 | (*info->memory_error_func) (status, memaddr, info);
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| 46 | return -1;
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| 47 | }
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| 48 |
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| 49 | insn = *(unsigned char *) buffer;
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| 50 |
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| 51 | /* These are one byte insns. */
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| 52 | if ((insn & 0xf0) == 0x00
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| 53 | || (insn & 0xf0) == 0x10
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| 54 | || (insn & 0xf0) == 0x20
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| 55 | || (insn & 0xf0) == 0x30
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| 56 | || ((insn & 0xf0) == 0x80
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| 57 | && (insn & 0x0c) >> 2 != (insn & 0x03))
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| 58 | || (insn & 0xf0) == 0x90
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| 59 | || (insn & 0xf0) == 0xa0
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| 60 | || (insn & 0xf0) == 0xb0
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| 61 | || (insn & 0xff) == 0xeb
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| 62 | || (insn & 0xff) == 0xf6
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| 63 | || (insn & 0xff) == 0xfe
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| 64 | || (insn & 0xff) == 0xff)
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| 65 | {
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| 66 | extension = 0;
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| 67 | consume = 1;
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| 68 | }
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| 69 |
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| 70 | /* These are two byte insns. */
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| 71 | else if ((insn & 0xf0) == 0x40
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| 72 | || (insn & 0xf0) == 0x50
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| 73 | || (insn & 0xf0) == 0x60
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| 74 | || (insn & 0xf0) == 0x70
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| 75 | || (insn & 0xf0) == 0x80
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| 76 | || (insn & 0xfc) == 0xd0
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| 77 | || (insn & 0xfc) == 0xd4
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| 78 | || (insn & 0xfc) == 0xd8
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| 79 | || (insn & 0xfc) == 0xe0
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| 80 | || (insn & 0xfc) == 0xe4
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| 81 | || (insn & 0xff) == 0xe8
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| 82 | || (insn & 0xff) == 0xe9
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| 83 | || (insn & 0xff) == 0xea
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| 84 | || (insn & 0xff) == 0xf0
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| 85 | || (insn & 0xff) == 0xf1
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| 86 | || (insn & 0xff) == 0xf2
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| 87 | || (insn & 0xff) == 0xf3)
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| 88 | {
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| 89 | status = (*info->read_memory_func) (memaddr, buffer, 2, info);
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| 90 | if (status != 0)
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| 91 | {
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| 92 | (*info->memory_error_func) (status, memaddr, info);
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| 93 | return -1;
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| 94 | }
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| 95 | insn = bfd_getb16 (buffer);
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| 96 | consume = 2;
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| 97 | }
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| 98 |
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| 99 | /* These are three byte insns with a 16bit operand in little
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| 100 | endian form. */
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| 101 | else if ((insn & 0xf0) == 0xc0
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| 102 | || (insn & 0xfc) == 0xdc
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| 103 | || (insn & 0xfc) == 0xec
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| 104 | || (insn & 0xff) == 0xf8
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| 105 | || (insn & 0xff) == 0xf9
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| 106 | || (insn & 0xff) == 0xfa
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| 107 | || (insn & 0xff) == 0xfb
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| 108 | || (insn & 0xff) == 0xfc
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| 109 | || (insn & 0xff) == 0xfd)
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| 110 | {
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| 111 | status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info);
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| 112 | if (status != 0)
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| 113 | {
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| 114 | (*info->memory_error_func) (status, memaddr, info);
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| 115 | return -1;
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| 116 | }
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| 117 | insn <<= 16;
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| 118 | insn |= bfd_getl16 (buffer);
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| 119 | extension = 0;
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| 120 | consume = 3;
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| 121 | }
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| 122 | /* These are three byte insns too, but we don't have to mess with
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| 123 | endianness stuff. */
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| 124 | else if ((insn & 0xff) == 0xf5)
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| 125 | {
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| 126 | status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info);
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| 127 | if (status != 0)
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| 128 | {
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| 129 | (*info->memory_error_func) (status, memaddr, info);
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| 130 | return -1;
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| 131 | }
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| 132 | insn <<= 16;
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| 133 | insn |= bfd_getb16 (buffer);
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| 134 | extension = 0;
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| 135 | consume = 3;
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| 136 | }
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| 137 |
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| 138 | /* These are four byte insns. */
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| 139 | else if ((insn & 0xff) == 0xf7)
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| 140 | {
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| 141 | status = (*info->read_memory_func) (memaddr, buffer, 2, info);
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| 142 | if (status != 0)
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| 143 | {
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| 144 | (*info->memory_error_func) (status, memaddr, info);
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| 145 | return -1;
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| 146 | }
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| 147 | insn = bfd_getb16 (buffer);
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| 148 | insn <<= 16;
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| 149 | status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info);
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| 150 | if (status != 0)
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| 151 | {
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| 152 | (*info->memory_error_func) (status, memaddr, info);
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| 153 | return -1;
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| 154 | }
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| 155 | insn |= bfd_getl16 (buffer);
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| 156 | extension = 0;
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| 157 | consume = 4;
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| 158 | }
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| 159 |
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| 160 | /* These are five byte insns. */
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| 161 | else if ((insn & 0xff) == 0xf4)
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| 162 | {
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| 163 | status = (*info->read_memory_func) (memaddr, buffer, 2, info);
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| 164 | if (status != 0)
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| 165 | {
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| 166 | (*info->memory_error_func) (status, memaddr, info);
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| 167 | return -1;
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| 168 | }
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| 169 | insn = bfd_getb16 (buffer);
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| 170 | insn <<= 16;
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| 171 |
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| 172 | status = (*info->read_memory_func) (memaddr + 4, buffer, 1, info);
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| 173 | if (status != 0)
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| 174 | {
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| 175 | (*info->memory_error_func) (status, memaddr, info);
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| 176 | return -1;
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| 177 | }
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| 178 | insn |= (*(unsigned char *)buffer << 8) & 0xff00;
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| 179 |
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| 180 | status = (*info->read_memory_func) (memaddr + 3, buffer, 1, info);
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| 181 | if (status != 0)
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| 182 | {
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| 183 | (*info->memory_error_func) (status, memaddr, info);
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| 184 | return -1;
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| 185 | }
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| 186 | insn |= (*(unsigned char *)buffer) & 0xff;
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| 187 |
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| 188 | status = (*info->read_memory_func) (memaddr + 2, buffer, 1, info);
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| 189 | if (status != 0)
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| 190 | {
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| 191 | (*info->memory_error_func) (status, memaddr, info);
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| 192 | return -1;
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| 193 | }
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| 194 | extension = (*(unsigned char *)buffer) & 0xff;
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| 195 | consume = 5;
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| 196 | }
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| 197 | else
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| 198 | {
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| 199 | (*info->fprintf_func) (info->stream, _("unknown\t0x%02x"), insn);
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| 200 | return 1;
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| 201 | }
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| 202 |
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| 203 | disassemble (memaddr, info, insn, extension, consume);
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| 204 |
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| 205 | return consume;
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| 206 | }
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| 207 |
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| 208 | static void
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| 209 | disassemble (memaddr, info, insn, extension, size)
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| 210 | bfd_vma memaddr;
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| 211 | struct disassemble_info *info;
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| 212 | unsigned long insn;
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| 213 | unsigned long extension;
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| 214 | unsigned int size;
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| 215 | {
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| 216 | struct mn10200_opcode *op = (struct mn10200_opcode *)mn10200_opcodes;
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| 217 | const struct mn10200_operand *operand;
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| 218 | int match = 0;
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| 219 |
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| 220 | /* Find the opcode. */
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| 221 | while (op->name)
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| 222 | {
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| 223 | int mysize, extra_shift;
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| 224 |
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| 225 | if (op->format == FMT_1)
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| 226 | mysize = 1;
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| 227 | else if (op->format == FMT_2
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| 228 | || op->format == FMT_4)
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| 229 | mysize = 2;
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| 230 | else if (op->format == FMT_3
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| 231 | || op->format == FMT_5)
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| 232 | mysize = 3;
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| 233 | else if (op->format == FMT_6)
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| 234 | mysize = 4;
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| 235 | else if (op->format == FMT_7)
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| 236 | mysize = 5;
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| 237 | else
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| 238 | abort ();
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| 239 |
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| 240 | if (op->format == FMT_2 || op->format == FMT_5)
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| 241 | extra_shift = 8;
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| 242 | else if (op->format == FMT_3
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| 243 | || op->format == FMT_6
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| 244 | || op->format == FMT_7)
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| 245 | extra_shift = 16;
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| 246 | else
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| 247 | extra_shift = 0;
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| 248 |
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| 249 | if ((op->mask & insn) == op->opcode
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| 250 | && size == (unsigned int) mysize)
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| 251 | {
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| 252 | const unsigned char *opindex_ptr;
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| 253 | unsigned int nocomma;
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| 254 | int paren = 0;
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| 255 |
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| 256 | match = 1;
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| 257 | (*info->fprintf_func) (info->stream, "%s\t", op->name);
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| 258 |
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| 259 | /* Now print the operands. */
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| 260 | for (opindex_ptr = op->operands, nocomma = 1;
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| 261 | *opindex_ptr != 0;
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| 262 | opindex_ptr++)
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| 263 | {
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| 264 | unsigned long value;
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| 265 |
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| 266 | operand = &mn10200_operands[*opindex_ptr];
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| 267 |
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| 268 | if ((operand->flags & MN10200_OPERAND_EXTENDED) != 0)
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| 269 | {
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| 270 | value = (insn & 0xffff) << 8;
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| 271 | value |= extension;
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| 272 | }
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| 273 | else
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| 274 | {
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| 275 | value = ((insn >> (operand->shift))
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| 276 | & ((1L << operand->bits) - 1L));
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| 277 | }
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| 278 |
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| 279 | if ((operand->flags & MN10200_OPERAND_SIGNED) != 0)
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| 280 | value = ((long)(value << (32 - operand->bits))
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| 281 | >> (32 - operand->bits));
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| 282 |
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| 283 | if (!nocomma
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| 284 | && (!paren
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| 285 | || ((operand->flags & MN10200_OPERAND_PAREN) == 0)))
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| 286 | (*info->fprintf_func) (info->stream, ",");
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| 287 |
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| 288 | nocomma = 0;
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| 289 |
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| 290 | if ((operand->flags & MN10200_OPERAND_DREG) != 0)
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| 291 | {
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| 292 | value = ((insn >> (operand->shift + extra_shift))
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| 293 | & ((1 << operand->bits) - 1));
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| 294 | (*info->fprintf_func) (info->stream, "d%d", value);
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| 295 | }
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| 296 |
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| 297 | else if ((operand->flags & MN10200_OPERAND_AREG) != 0)
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| 298 | {
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| 299 | value = ((insn >> (operand->shift + extra_shift))
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| 300 | & ((1 << operand->bits) - 1));
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| 301 | (*info->fprintf_func) (info->stream, "a%d", value);
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| 302 | }
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| 303 |
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| 304 | else if ((operand->flags & MN10200_OPERAND_PSW) != 0)
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| 305 | (*info->fprintf_func) (info->stream, "psw");
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| 306 |
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| 307 | else if ((operand->flags & MN10200_OPERAND_MDR) != 0)
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| 308 | (*info->fprintf_func) (info->stream, "mdr");
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| 309 |
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| 310 | else if ((operand->flags & MN10200_OPERAND_PAREN) != 0)
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| 311 | {
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| 312 | if (paren)
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| 313 | (*info->fprintf_func) (info->stream, ")");
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| 314 | else
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| 315 | {
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| 316 | (*info->fprintf_func) (info->stream, "(");
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| 317 | nocomma = 1;
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| 318 | }
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| 319 | paren = !paren;
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| 320 | }
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| 321 |
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| 322 | else if ((operand->flags & MN10200_OPERAND_PCREL) != 0)
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| 323 | (*info->print_address_func) ((value + memaddr + mysize) & 0xffffff, info);
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| 324 |
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| 325 | else if ((operand->flags & MN10200_OPERAND_MEMADDR) != 0)
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| 326 | (*info->print_address_func) (value, info);
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| 327 |
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| 328 | else
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| 329 | (*info->fprintf_func) (info->stream, "%ld", value);
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| 330 | }
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| 331 | /* All done. */
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| 332 | break;
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| 333 | }
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| 334 | op++;
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| 335 | }
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| 336 |
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| 337 | if (!match)
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| 338 | {
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| 339 | (*info->fprintf_func) (info->stream, _("unknown\t0x%04lx"), insn);
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| 340 | }
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| 341 | }
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