| 1 | /* Disassemble h8500 instructions. |
| 2 | Copyright (C) 1993-2015 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of the GNU opcodes library. |
| 5 | |
| 6 | This library is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | It is distributed in the hope that it will be useful, but WITHOUT |
| 12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 13 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| 14 | License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "sysdep.h" |
| 22 | #include <stdio.h> |
| 23 | |
| 24 | #define DISASSEMBLER_TABLE |
| 25 | #define DEFINE_TABLE |
| 26 | |
| 27 | #include "h8500-opc.h" |
| 28 | #include "dis-asm.h" |
| 29 | #include "opintl.h" |
| 30 | |
| 31 | /* Maximum length of an instruction. */ |
| 32 | #define MAXLEN 8 |
| 33 | |
| 34 | #include <setjmp.h> |
| 35 | |
| 36 | struct private |
| 37 | { |
| 38 | /* Points to first byte not fetched. */ |
| 39 | bfd_byte *max_fetched; |
| 40 | bfd_byte the_buffer[MAXLEN]; |
| 41 | bfd_vma insn_start; |
| 42 | OPCODES_SIGJMP_BUF bailout; |
| 43 | }; |
| 44 | |
| 45 | /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive) |
| 46 | to ADDR (exclusive) are valid. Returns 1 for success, longjmps |
| 47 | on error. */ |
| 48 | #define FETCH_DATA(info, addr) \ |
| 49 | ((addr) <= ((struct private *)(info->private_data))->max_fetched \ |
| 50 | ? 1 : fetch_data ((info), (addr))) |
| 51 | |
| 52 | static int |
| 53 | fetch_data (struct disassemble_info *info, bfd_byte *addr) |
| 54 | { |
| 55 | int status; |
| 56 | struct private *priv = (struct private *) info->private_data; |
| 57 | bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer); |
| 58 | |
| 59 | status = (*info->read_memory_func) (start, |
| 60 | priv->max_fetched, |
| 61 | addr - priv->max_fetched, |
| 62 | info); |
| 63 | if (status != 0) |
| 64 | { |
| 65 | (*info->memory_error_func) (status, start, info); |
| 66 | OPCODES_SIGLONGJMP (priv->bailout, 1); |
| 67 | } |
| 68 | else |
| 69 | priv->max_fetched = addr; |
| 70 | return 1; |
| 71 | } |
| 72 | |
| 73 | static char *crname[] = { "sr", "ccr", "*", "br", "ep", "dp", "*", "tp" }; |
| 74 | |
| 75 | int |
| 76 | print_insn_h8500 (bfd_vma addr, disassemble_info *info) |
| 77 | { |
| 78 | const h8500_opcode_info *opcode; |
| 79 | void *stream = info->stream; |
| 80 | fprintf_ftype func = info->fprintf_func; |
| 81 | struct private priv; |
| 82 | bfd_byte *buffer = priv.the_buffer; |
| 83 | |
| 84 | info->private_data = (PTR) & priv; |
| 85 | priv.max_fetched = priv.the_buffer; |
| 86 | priv.insn_start = addr; |
| 87 | if (OPCODES_SIGSETJMP (priv.bailout) != 0) |
| 88 | /* Error return. */ |
| 89 | return -1; |
| 90 | |
| 91 | /* Run down the table to find the one which matches. */ |
| 92 | for (opcode = h8500_table; opcode->name; opcode++) |
| 93 | { |
| 94 | int byte; |
| 95 | int rn = 0; |
| 96 | int rd = 0; |
| 97 | int rs = 0; |
| 98 | int disp = 0; |
| 99 | int abs_val = 0; |
| 100 | int imm = 0; |
| 101 | int pcrel = 0; |
| 102 | int qim = 0; |
| 103 | int i; |
| 104 | int cr = 0; |
| 105 | |
| 106 | for (byte = 0; byte < opcode->length; byte++) |
| 107 | { |
| 108 | FETCH_DATA (info, buffer + byte + 1); |
| 109 | if ((buffer[byte] & opcode->bytes[byte].mask) |
| 110 | != (opcode->bytes[byte].contents)) |
| 111 | goto next; |
| 112 | |
| 113 | else |
| 114 | { |
| 115 | /* Extract any info parts. */ |
| 116 | switch (opcode->bytes[byte].insert) |
| 117 | { |
| 118 | case 0: |
| 119 | case FP: |
| 120 | break; |
| 121 | default: |
| 122 | /* xgettext:c-format */ |
| 123 | func (stream, _("can't cope with insert %d\n"), |
| 124 | opcode->bytes[byte].insert); |
| 125 | break; |
| 126 | case RN: |
| 127 | rn = buffer[byte] & 0x7; |
| 128 | break; |
| 129 | case RS: |
| 130 | rs = buffer[byte] & 0x7; |
| 131 | break; |
| 132 | case CRB: |
| 133 | cr = buffer[byte] & 0x7; |
| 134 | if (cr == 0) |
| 135 | goto next; |
| 136 | break; |
| 137 | case CRW: |
| 138 | cr = buffer[byte] & 0x7; |
| 139 | if (cr != 0) |
| 140 | goto next; |
| 141 | break; |
| 142 | case DISP16: |
| 143 | FETCH_DATA (info, buffer + byte + 2); |
| 144 | disp = (buffer[byte] << 8) | (buffer[byte + 1]); |
| 145 | break; |
| 146 | case FPIND_D8: |
| 147 | case DISP8: |
| 148 | disp = ((char) (buffer[byte])); |
| 149 | break; |
| 150 | case RD: |
| 151 | case RDIND: |
| 152 | rd = buffer[byte] & 0x7; |
| 153 | break; |
| 154 | case ABS24: |
| 155 | FETCH_DATA (info, buffer + byte + 3); |
| 156 | abs_val = |
| 157 | (buffer[byte] << 16) |
| 158 | | (buffer[byte + 1] << 8) |
| 159 | | (buffer[byte + 2]); |
| 160 | break; |
| 161 | case ABS16: |
| 162 | FETCH_DATA (info, buffer + byte + 2); |
| 163 | abs_val = (buffer[byte] << 8) | (buffer[byte + 1]); |
| 164 | break; |
| 165 | case ABS8: |
| 166 | abs_val = (buffer[byte]); |
| 167 | break; |
| 168 | case IMM16: |
| 169 | FETCH_DATA (info, buffer + byte + 2); |
| 170 | imm = (buffer[byte] << 8) | (buffer[byte + 1]); |
| 171 | break; |
| 172 | case IMM4: |
| 173 | imm = (buffer[byte]) & 0xf; |
| 174 | break; |
| 175 | case IMM8: |
| 176 | case RLIST: |
| 177 | imm = (buffer[byte]); |
| 178 | break; |
| 179 | case PCREL16: |
| 180 | FETCH_DATA (info, buffer + byte + 2); |
| 181 | pcrel = (buffer[byte] << 8) | (buffer[byte + 1]); |
| 182 | break; |
| 183 | case PCREL8: |
| 184 | pcrel = (buffer[byte]); |
| 185 | break; |
| 186 | case QIM: |
| 187 | switch (buffer[byte] & 0x7) |
| 188 | { |
| 189 | case 0: |
| 190 | qim = 1; |
| 191 | break; |
| 192 | case 1: |
| 193 | qim = 2; |
| 194 | break; |
| 195 | case 4: |
| 196 | qim = -1; |
| 197 | break; |
| 198 | case 5: |
| 199 | qim = -2; |
| 200 | break; |
| 201 | } |
| 202 | break; |
| 203 | |
| 204 | } |
| 205 | } |
| 206 | } |
| 207 | /* We get here when all the masks have passed so we can output |
| 208 | the operands. */ |
| 209 | FETCH_DATA (info, buffer + opcode->length); |
| 210 | (func) (stream, "%s\t", opcode->name); |
| 211 | for (i = 0; i < opcode->nargs; i++) |
| 212 | { |
| 213 | if (i) |
| 214 | (func) (stream, ","); |
| 215 | switch (opcode->arg_type[i]) |
| 216 | { |
| 217 | case FP: |
| 218 | func (stream, "fp"); |
| 219 | break; |
| 220 | case RNIND_D16: |
| 221 | func (stream, "@(0x%x:16,r%d)", disp, rn); |
| 222 | break; |
| 223 | case RNIND_D8: |
| 224 | func (stream, "@(0x%x:8 (%d),r%d)", disp & 0xff, disp, rn); |
| 225 | break; |
| 226 | case RDIND_D16: |
| 227 | func (stream, "@(0x%x:16,r%d)", disp, rd); |
| 228 | break; |
| 229 | case RDIND_D8: |
| 230 | func (stream, "@(0x%x:8 (%d), r%d)", disp & 0xff, disp, rd); |
| 231 | break; |
| 232 | case FPIND_D8: |
| 233 | func (stream, "@(0x%x:8 (%d), fp)", disp & 0xff, disp); |
| 234 | break; |
| 235 | case CRB: |
| 236 | case CRW: |
| 237 | func (stream, "%s", crname[cr]); |
| 238 | break; |
| 239 | case RN: |
| 240 | func (stream, "r%d", rn); |
| 241 | break; |
| 242 | case RD: |
| 243 | func (stream, "r%d", rd); |
| 244 | break; |
| 245 | case RS: |
| 246 | func (stream, "r%d", rs); |
| 247 | break; |
| 248 | case RNDEC: |
| 249 | func (stream, "@-r%d", rn); |
| 250 | break; |
| 251 | case RNINC: |
| 252 | func (stream, "@r%d+", rn); |
| 253 | break; |
| 254 | case RNIND: |
| 255 | func (stream, "@r%d", rn); |
| 256 | break; |
| 257 | case RDIND: |
| 258 | func (stream, "@r%d", rd); |
| 259 | break; |
| 260 | case SPINC: |
| 261 | func (stream, "@sp+"); |
| 262 | break; |
| 263 | case SPDEC: |
| 264 | func (stream, "@-sp"); |
| 265 | break; |
| 266 | case ABS24: |
| 267 | func (stream, "@0x%0x:24", abs_val); |
| 268 | break; |
| 269 | case ABS16: |
| 270 | func (stream, "@0x%0x:16", abs_val & 0xffff); |
| 271 | break; |
| 272 | case ABS8: |
| 273 | func (stream, "@0x%0x:8", abs_val & 0xff); |
| 274 | break; |
| 275 | case IMM16: |
| 276 | func (stream, "#0x%0x:16", imm & 0xffff); |
| 277 | break; |
| 278 | case RLIST: |
| 279 | { |
| 280 | int j; |
| 281 | int nc = 0; |
| 282 | |
| 283 | func (stream, "("); |
| 284 | for (j = 0; j < 8; j++) |
| 285 | { |
| 286 | if (imm & (1 << j)) |
| 287 | { |
| 288 | func (stream, "r%d", j); |
| 289 | if (nc) |
| 290 | func (stream, ","); |
| 291 | nc = 1; |
| 292 | } |
| 293 | } |
| 294 | func (stream, ")"); |
| 295 | } |
| 296 | break; |
| 297 | case IMM8: |
| 298 | func (stream, "#0x%0x:8", imm & 0xff); |
| 299 | break; |
| 300 | case PCREL16: |
| 301 | func (stream, "0x%0x:16", |
| 302 | (int)(pcrel + addr + opcode->length) & 0xffff); |
| 303 | break; |
| 304 | case PCREL8: |
| 305 | func (stream, "#0x%0x:8", |
| 306 | (int)((char) pcrel + addr + opcode->length) & 0xffff); |
| 307 | break; |
| 308 | case QIM: |
| 309 | func (stream, "#%d:q", qim); |
| 310 | break; |
| 311 | case IMM4: |
| 312 | func (stream, "#%d:4", imm); |
| 313 | break; |
| 314 | } |
| 315 | } |
| 316 | return opcode->length; |
| 317 | next: |
| 318 | ; |
| 319 | } |
| 320 | |
| 321 | /* Couldn't understand anything. */ |
| 322 | /* xgettext:c-format */ |
| 323 | func (stream, _("%02x\t\t*unknown*"), buffer[0]); |
| 324 | return 1; |
| 325 | } |