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