| 1 | /* Disassemble SH instructions. |
| 2 | Copyright (C) 1993, 94, 95, 96, 97, 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 "sh-opc.h" |
| 23 | #include "dis-asm.h" |
| 24 | |
| 25 | #define LITTLE_BIT 2 |
| 26 | |
| 27 | static int |
| 28 | print_insn_shx (memaddr, info) |
| 29 | bfd_vma memaddr; |
| 30 | struct disassemble_info *info; |
| 31 | { |
| 32 | fprintf_ftype fprintf_fn = info->fprintf_func; |
| 33 | void *stream = info->stream; |
| 34 | unsigned char insn[2]; |
| 35 | unsigned char nibs[4]; |
| 36 | int status; |
| 37 | bfd_vma relmask = ~ (bfd_vma) 0; |
| 38 | sh_opcode_info *op; |
| 39 | |
| 40 | status = info->read_memory_func (memaddr, insn, 2, info); |
| 41 | |
| 42 | if (status != 0) |
| 43 | { |
| 44 | info->memory_error_func (status, memaddr, info); |
| 45 | return -1; |
| 46 | } |
| 47 | |
| 48 | if (info->flags & LITTLE_BIT) |
| 49 | { |
| 50 | nibs[0] = (insn[1] >> 4) & 0xf; |
| 51 | nibs[1] = insn[1] & 0xf; |
| 52 | |
| 53 | nibs[2] = (insn[0] >> 4) & 0xf; |
| 54 | nibs[3] = insn[0] & 0xf; |
| 55 | } |
| 56 | else |
| 57 | { |
| 58 | nibs[0] = (insn[0] >> 4) & 0xf; |
| 59 | nibs[1] = insn[0] & 0xf; |
| 60 | |
| 61 | nibs[2] = (insn[1] >> 4) & 0xf; |
| 62 | nibs[3] = insn[1] & 0xf; |
| 63 | } |
| 64 | |
| 65 | for (op = sh_table; op->name; op++) |
| 66 | { |
| 67 | int n; |
| 68 | int imm = 0; |
| 69 | int rn = 0; |
| 70 | int rm = 0; |
| 71 | int rb = 0; |
| 72 | int disp_pc; |
| 73 | bfd_vma disp_pc_addr = 0; |
| 74 | |
| 75 | for (n = 0; n < 4; n++) |
| 76 | { |
| 77 | int i = op->nibbles[n]; |
| 78 | |
| 79 | if (i < 16) |
| 80 | { |
| 81 | if (nibs[n] == i) |
| 82 | continue; |
| 83 | goto fail; |
| 84 | } |
| 85 | switch (i) |
| 86 | { |
| 87 | case BRANCH_8: |
| 88 | imm = (nibs[2] << 4) | (nibs[3]); |
| 89 | if (imm & 0x80) |
| 90 | imm |= ~0xff; |
| 91 | imm = ((char)imm) * 2 + 4 ; |
| 92 | goto ok; |
| 93 | case BRANCH_12: |
| 94 | imm = ((nibs[1]) << 8) | (nibs[2] << 4) | (nibs[3]); |
| 95 | if (imm & 0x800) |
| 96 | imm |= ~0xfff; |
| 97 | imm = imm * 2 + 4; |
| 98 | goto ok; |
| 99 | case IMM_4: |
| 100 | imm = nibs[3]; |
| 101 | goto ok; |
| 102 | case IMM_4BY2: |
| 103 | imm = nibs[3] <<1; |
| 104 | goto ok; |
| 105 | case IMM_4BY4: |
| 106 | imm = nibs[3] <<2; |
| 107 | goto ok; |
| 108 | case IMM_8: |
| 109 | imm = (nibs[2] << 4) | nibs[3]; |
| 110 | goto ok; |
| 111 | case PCRELIMM_8BY2: |
| 112 | imm = ((nibs[2] << 4) | nibs[3]) <<1; |
| 113 | relmask = ~ (bfd_vma) 1; |
| 114 | goto ok; |
| 115 | case PCRELIMM_8BY4: |
| 116 | imm = ((nibs[2] << 4) | nibs[3]) <<2; |
| 117 | relmask = ~ (bfd_vma) 3; |
| 118 | goto ok; |
| 119 | case IMM_8BY2: |
| 120 | imm = ((nibs[2] << 4) | nibs[3]) <<1; |
| 121 | goto ok; |
| 122 | case IMM_8BY4: |
| 123 | imm = ((nibs[2] << 4) | nibs[3]) <<2; |
| 124 | goto ok; |
| 125 | case DISP_8: |
| 126 | imm = (nibs[2] << 4) | (nibs[3]); |
| 127 | goto ok; |
| 128 | case DISP_4: |
| 129 | imm = nibs[3]; |
| 130 | goto ok; |
| 131 | case REG_N: |
| 132 | rn = nibs[n]; |
| 133 | break; |
| 134 | case REG_M: |
| 135 | rm = nibs[n]; |
| 136 | break; |
| 137 | case REG_NM: |
| 138 | rn = (nibs[n] & 0xc) >> 2; |
| 139 | rm = (nibs[n] & 0x3); |
| 140 | break; |
| 141 | case REG_B: |
| 142 | rb = nibs[n] & 0x07; |
| 143 | break; |
| 144 | default: |
| 145 | abort(); |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | ok: |
| 150 | fprintf_fn (stream,"%s\t", op->name); |
| 151 | disp_pc = 0; |
| 152 | for (n = 0; n < 3 && op->arg[n] != A_END; n++) |
| 153 | { |
| 154 | if (n && op->arg[1] != A_END) |
| 155 | fprintf_fn (stream, ","); |
| 156 | switch (op->arg[n]) |
| 157 | { |
| 158 | case A_IMM: |
| 159 | fprintf_fn (stream, "#%d", (char)(imm)); |
| 160 | break; |
| 161 | case A_R0: |
| 162 | fprintf_fn (stream, "r0"); |
| 163 | break; |
| 164 | case A_REG_N: |
| 165 | fprintf_fn (stream, "r%d", rn); |
| 166 | break; |
| 167 | case A_INC_N: |
| 168 | fprintf_fn (stream, "@r%d+", rn); |
| 169 | break; |
| 170 | case A_DEC_N: |
| 171 | fprintf_fn (stream, "@-r%d", rn); |
| 172 | break; |
| 173 | case A_IND_N: |
| 174 | fprintf_fn (stream, "@r%d", rn); |
| 175 | break; |
| 176 | case A_DISP_REG_N: |
| 177 | fprintf_fn (stream, "@(%d,r%d)", imm, rn); |
| 178 | break; |
| 179 | case A_REG_M: |
| 180 | fprintf_fn (stream, "r%d", rm); |
| 181 | break; |
| 182 | case A_INC_M: |
| 183 | fprintf_fn (stream, "@r%d+", rm); |
| 184 | break; |
| 185 | case A_DEC_M: |
| 186 | fprintf_fn (stream, "@-r%d", rm); |
| 187 | break; |
| 188 | case A_IND_M: |
| 189 | fprintf_fn (stream, "@r%d", rm); |
| 190 | break; |
| 191 | case A_DISP_REG_M: |
| 192 | fprintf_fn (stream, "@(%d,r%d)", imm, rm); |
| 193 | break; |
| 194 | case A_REG_B: |
| 195 | fprintf_fn (stream, "r%d_bank", rb); |
| 196 | break; |
| 197 | case A_DISP_PC: |
| 198 | disp_pc = 1; |
| 199 | disp_pc_addr = imm + 4 + (memaddr & relmask); |
| 200 | (*info->print_address_func) (disp_pc_addr, info); |
| 201 | break; |
| 202 | case A_IND_R0_REG_N: |
| 203 | fprintf_fn (stream, "@(r0,r%d)", rn); |
| 204 | break; |
| 205 | case A_IND_R0_REG_M: |
| 206 | fprintf_fn (stream, "@(r0,r%d)", rm); |
| 207 | break; |
| 208 | case A_DISP_GBR: |
| 209 | fprintf_fn (stream, "@(%d,gbr)",imm); |
| 210 | break; |
| 211 | case A_R0_GBR: |
| 212 | fprintf_fn (stream, "@(r0,gbr)"); |
| 213 | break; |
| 214 | case A_BDISP12: |
| 215 | case A_BDISP8: |
| 216 | (*info->print_address_func) (imm + memaddr, info); |
| 217 | break; |
| 218 | case A_SR: |
| 219 | fprintf_fn (stream, "sr"); |
| 220 | break; |
| 221 | case A_GBR: |
| 222 | fprintf_fn (stream, "gbr"); |
| 223 | break; |
| 224 | case A_VBR: |
| 225 | fprintf_fn (stream, "vbr"); |
| 226 | break; |
| 227 | case A_SSR: |
| 228 | fprintf_fn (stream, "ssr"); |
| 229 | break; |
| 230 | case A_SPC: |
| 231 | fprintf_fn (stream, "spc"); |
| 232 | break; |
| 233 | case A_MACH: |
| 234 | fprintf_fn (stream, "mach"); |
| 235 | break; |
| 236 | case A_MACL: |
| 237 | fprintf_fn (stream ,"macl"); |
| 238 | break; |
| 239 | case A_PR: |
| 240 | fprintf_fn (stream, "pr"); |
| 241 | break; |
| 242 | case A_SGR: |
| 243 | fprintf_fn (stream, "sgr"); |
| 244 | break; |
| 245 | case A_DBR: |
| 246 | fprintf_fn (stream, "dbr"); |
| 247 | break; |
| 248 | case FD_REG_N: |
| 249 | if (0) |
| 250 | goto d_reg_n; |
| 251 | case F_REG_N: |
| 252 | fprintf_fn (stream, "fr%d", rn); |
| 253 | break; |
| 254 | case F_REG_M: |
| 255 | fprintf_fn (stream, "fr%d", rm); |
| 256 | break; |
| 257 | case DX_REG_N: |
| 258 | if (rn & 1) |
| 259 | { |
| 260 | fprintf_fn (stream, "xd%d", rn & ~1); |
| 261 | break; |
| 262 | } |
| 263 | d_reg_n: |
| 264 | case D_REG_N: |
| 265 | fprintf_fn (stream, "dr%d", rn); |
| 266 | break; |
| 267 | case DX_REG_M: |
| 268 | if (rm & 1) |
| 269 | { |
| 270 | fprintf_fn (stream, "xd%d", rm & ~1); |
| 271 | break; |
| 272 | } |
| 273 | case D_REG_M: |
| 274 | fprintf_fn (stream, "dr%d", rm); |
| 275 | break; |
| 276 | case FPSCR_M: |
| 277 | case FPSCR_N: |
| 278 | fprintf_fn (stream, "fpscr"); |
| 279 | break; |
| 280 | case FPUL_M: |
| 281 | case FPUL_N: |
| 282 | fprintf_fn (stream, "fpul"); |
| 283 | break; |
| 284 | case F_FR0: |
| 285 | fprintf_fn (stream, "fr0"); |
| 286 | break; |
| 287 | case V_REG_N: |
| 288 | fprintf_fn (stream, "fv%d", rn*4); |
| 289 | break; |
| 290 | case V_REG_M: |
| 291 | fprintf_fn (stream, "fv%d", rm*4); |
| 292 | break; |
| 293 | case XMTRX_M4: |
| 294 | fprintf_fn (stream, "xmtrx"); |
| 295 | break; |
| 296 | default: |
| 297 | abort(); |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | #if 0 |
| 302 | /* This code prints instructions in delay slots on the same line |
| 303 | as the instruction which needs the delay slots. This can be |
| 304 | confusing, since other disassembler don't work this way, and |
| 305 | it means that the instructions are not all in a line. So I |
| 306 | disabled it. Ian. */ |
| 307 | if (!(info->flags & 1) |
| 308 | && (op->name[0] == 'j' |
| 309 | || (op->name[0] == 'b' |
| 310 | && (op->name[1] == 'r' |
| 311 | || op->name[1] == 's')) |
| 312 | || (op->name[0] == 'r' && op->name[1] == 't') |
| 313 | || (op->name[0] == 'b' && op->name[2] == '.'))) |
| 314 | { |
| 315 | info->flags |= 1; |
| 316 | fprintf_fn (stream, "\t(slot "); |
| 317 | print_insn_shx (memaddr + 2, info); |
| 318 | info->flags &= ~1; |
| 319 | fprintf_fn (stream, ")"); |
| 320 | return 4; |
| 321 | } |
| 322 | #endif |
| 323 | |
| 324 | if (disp_pc && strcmp (op->name, "mova") != 0) |
| 325 | { |
| 326 | int size; |
| 327 | bfd_byte bytes[4]; |
| 328 | |
| 329 | if (relmask == ~ (bfd_vma) 1) |
| 330 | size = 2; |
| 331 | else |
| 332 | size = 4; |
| 333 | status = info->read_memory_func (disp_pc_addr, bytes, size, info); |
| 334 | if (status == 0) |
| 335 | { |
| 336 | unsigned int val; |
| 337 | |
| 338 | if (size == 2) |
| 339 | { |
| 340 | if ((info->flags & LITTLE_BIT) != 0) |
| 341 | val = bfd_getl16 (bytes); |
| 342 | else |
| 343 | val = bfd_getb16 (bytes); |
| 344 | } |
| 345 | else |
| 346 | { |
| 347 | if ((info->flags & LITTLE_BIT) != 0) |
| 348 | val = bfd_getl32 (bytes); |
| 349 | else |
| 350 | val = bfd_getb32 (bytes); |
| 351 | } |
| 352 | fprintf_fn (stream, "\t! 0x%x", val); |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | return 2; |
| 357 | fail: |
| 358 | ; |
| 359 | |
| 360 | } |
| 361 | fprintf_fn (stream, ".word 0x%x%x%x%x", nibs[0], nibs[1], nibs[2], nibs[3]); |
| 362 | return 2; |
| 363 | } |
| 364 | |
| 365 | int |
| 366 | print_insn_shl (memaddr, info) |
| 367 | bfd_vma memaddr; |
| 368 | struct disassemble_info *info; |
| 369 | { |
| 370 | int r; |
| 371 | |
| 372 | info->flags = LITTLE_BIT; |
| 373 | r = print_insn_shx (memaddr, info); |
| 374 | return r; |
| 375 | } |
| 376 | |
| 377 | int |
| 378 | print_insn_sh (memaddr, info) |
| 379 | bfd_vma memaddr; |
| 380 | struct disassemble_info *info; |
| 381 | { |
| 382 | int r; |
| 383 | |
| 384 | info->flags = 0; |
| 385 | r = print_insn_shx (memaddr, info); |
| 386 | return r; |
| 387 | } |