1 /* Print Z80, Z180, EZ80 and R800 instructions 2 Copyright (C) 2005-2020 Free Software Foundation, Inc. 3 Contributed by Arnold Metselaar <arnold_m@operamail.com> 4 5 This file is part of the GNU opcodes library. 6 7 This library is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 It is distributed in the hope that it will be useful, but WITHOUT 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 15 License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 #include "sysdep.h" 23 #include "disassemble.h" 24 #include <stdio.h> 25 26 struct buffer 27 { 28 bfd_vma base; 29 int n_fetch; 30 int n_used; 31 signed char data[6]; 32 long inss; /* instruction set bit mask, taken from bfd_mach */ 33 int nn_len; /* address length: 2 - Z80 mode, 3 - ADL mode*/ 34 } ; 35 36 typedef int (*func)(struct buffer *, disassemble_info *, const char *); 37 38 struct tab_elt 39 { 40 unsigned char val; 41 unsigned char mask; 42 func fp; 43 const char * text; 44 unsigned inss; /* bit mask of supported bfd_mach_* or 0 for all mach */ 45 } ; 46 47 #define INSS_ALL 0 48 #define INSS_Z80 ((1 << bfd_mach_z80) | (1 << bfd_mach_z80strict) | (1 << bfd_mach_z80full)) 49 #define INSS_R800 (1 << bfd_mach_r800) 50 #define INSS_GBZ80 (1 << bfd_mach_gbz80) 51 #define INSS_Z180 (1 << bfd_mach_z180) 52 #define INSS_EZ80_Z80 (1 << bfd_mach_ez80_z80) 53 #define INSS_EZ80_ADL (1 << bfd_mach_ez80_adl) 54 #define INSS_EZ80 (INSS_EZ80_ADL | INSS_EZ80_Z80) 55 #define INSS_Z80N (1 << bfd_mach_z80n) 56 57 #define TXTSIZ 24 58 /* Names of 16-bit registers. */ 59 static const char * rr_str[] = { "bc", "de", "hl", "sp" }; 60 /* Names of 8-bit registers. */ 61 static const char * r_str[] = { "b", "c", "d", "e", "h", "l", "(hl)", "a" }; 62 /* Texts for condition codes. */ 63 static const char * cc_str[] = { "nz", "z", "nc", "c", "po", "pe", "p", "m" }; 64 /* Instruction names for 8-bit arithmetic, operand "a" is often implicit */ 65 static const char * arit_str[] = 66 { 67 "add a,", "adc a,", "sub ", "sbc a,", "and ", "xor ", "or ", "cp " 68 } ; 69 static const char * arit_str_gbz80[] = 70 { 71 "add a,", "adc a,", "sub a,", "sbc a,", "and ", "xor ", "or ", "cp " 72 } ; 73 static const char * arit_str_ez80[] = 74 { 75 "add a,", "adc a,", "sub a,", "sbc a,", "and a,", "xor a,", "or a,", "cp a," 76 } ; 77 78 79 static int 80 mach_inst (struct buffer *buf, const struct tab_elt *p) 81 { 82 return !p->inss || (p->inss & buf->inss); 83 } 84 85 static int 86 fetch_data (struct buffer *buf, disassemble_info * info, int n) 87 { 88 int r; 89 90 if (buf->n_fetch + n > (int)sizeof (buf->data)) 91 abort (); 92 93 r = info->read_memory_func (buf->base + buf->n_fetch, 94 (unsigned char*) buf->data + buf->n_fetch, 95 n, info); 96 if (r == 0) 97 buf->n_fetch += n; 98 return !r; 99 } 100 101 static int 102 prt (struct buffer *buf, disassemble_info * info, const char *txt) 103 { 104 info->fprintf_func (info->stream, "%s", txt); 105 buf->n_used = buf->n_fetch; 106 return 1; 107 } 108 109 static int 110 prt_e (struct buffer *buf, disassemble_info * info, const char *txt) 111 { 112 char e; 113 int target_addr; 114 115 if (fetch_data (buf, info, 1)) 116 { 117 e = buf->data[1]; 118 target_addr = (buf->base + 2 + e) & 0xffff; 119 buf->n_used = buf->n_fetch; 120 info->fprintf_func (info->stream, "%s0x%04x", txt, target_addr); 121 } 122 else 123 buf->n_used = -1; 124 125 return buf->n_used; 126 } 127 128 static int 129 jr_cc (struct buffer *buf, disassemble_info * info, const char *txt) 130 { 131 char mytxt[TXTSIZ]; 132 133 snprintf (mytxt, TXTSIZ, txt, cc_str[(buf->data[0] >> 3) & 3]); 134 return prt_e (buf, info, mytxt); 135 } 136 137 static int 138 prt_nn (struct buffer *buf, disassemble_info * info, const char *txt) 139 { 140 int nn; 141 unsigned char *p; 142 int i; 143 144 p = (unsigned char*) buf->data + buf->n_fetch; 145 if (fetch_data (buf, info, buf->nn_len)) 146 { 147 nn = 0; 148 i = buf->nn_len; 149 while (i--) 150 nn = nn * 0x100 + p[i]; 151 info->fprintf_func (info->stream, txt, nn); 152 buf->n_used = buf->n_fetch; 153 } 154 else 155 buf->n_used = -1; 156 return buf->n_used; 157 } 158 159 static int 160 prt_rr_nn (struct buffer *buf, disassemble_info * info, const char *txt) 161 { 162 char mytxt[TXTSIZ]; 163 int rr; 164 165 rr = (buf->data[buf->n_fetch - 1] >> 4) & 3; 166 snprintf (mytxt, TXTSIZ, txt, rr_str[rr]); 167 return prt_nn (buf, info, mytxt); 168 } 169 170 static int 171 prt_rr (struct buffer *buf, disassemble_info * info, const char *txt) 172 { 173 info->fprintf_func (info->stream, "%s%s", txt, 174 rr_str[(buf->data[buf->n_fetch - 1] >> 4) & 3]); 175 buf->n_used = buf->n_fetch; 176 return buf->n_used; 177 } 178 179 static int 180 prt_n (struct buffer *buf, disassemble_info * info, const char *txt) 181 { 182 int n; 183 unsigned char *p; 184 185 p = (unsigned char*) buf->data + buf->n_fetch; 186 187 if (fetch_data (buf, info, 1)) 188 { 189 n = p[0]; 190 info->fprintf_func (info->stream, txt, n); 191 buf->n_used = buf->n_fetch; 192 } 193 else 194 buf->n_used = -1; 195 196 return buf->n_used; 197 } 198 199 static int 200 prt_n_n (struct buffer *buf, disassemble_info * info, const char *txt) 201 { 202 char mytxt[TXTSIZ]; 203 int n; 204 unsigned char *p; 205 206 p = (unsigned char*) buf->data + buf->n_fetch; 207 208 if (fetch_data (buf, info, 1)) 209 { 210 n = p[0]; 211 snprintf (mytxt, TXTSIZ, txt, n); 212 buf->n_used = buf->n_fetch; 213 } 214 else 215 buf->n_used = -1; 216 217 return prt_n (buf, info, mytxt); 218 } 219 220 static int 221 prt_r_n (struct buffer *buf, disassemble_info * info, const char *txt) 222 { 223 char mytxt[TXTSIZ]; 224 int r; 225 226 r = (buf->data[buf->n_fetch - 1] >> 3) & 7; 227 snprintf (mytxt, TXTSIZ, txt, r_str[r]); 228 return prt_n (buf, info, mytxt); 229 } 230 231 static int 232 ld_r_n (struct buffer *buf, disassemble_info * info, const char *txt) 233 { 234 char mytxt[TXTSIZ]; 235 236 snprintf (mytxt, TXTSIZ, txt, r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7]); 237 return prt_n (buf, info, mytxt); 238 } 239 240 static int 241 prt_r (struct buffer *buf, disassemble_info * info, const char *txt) 242 { 243 info->fprintf_func (info->stream, txt, 244 r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7]); 245 buf->n_used = buf->n_fetch; 246 return buf->n_used; 247 } 248 249 static int 250 ld_r_r (struct buffer *buf, disassemble_info * info, const char *txt) 251 { 252 info->fprintf_func (info->stream, txt, 253 r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7], 254 r_str[buf->data[buf->n_fetch - 1] & 7]); 255 buf->n_used = buf->n_fetch; 256 return buf->n_used; 257 } 258 259 static int 260 prt_d (struct buffer *buf, disassemble_info * info, const char *txt) 261 { 262 int d; 263 signed char *p; 264 265 p = buf->data + buf->n_fetch; 266 267 if (fetch_data (buf, info, 1)) 268 { 269 d = p[0]; 270 info->fprintf_func (info->stream, txt, d); 271 buf->n_used = buf->n_fetch; 272 } 273 else 274 buf->n_used = -1; 275 276 return buf->n_used; 277 } 278 279 static int 280 prt_rr_d (struct buffer *buf, disassemble_info * info, const char *txt) 281 { 282 char mytxt[TXTSIZ]; 283 int rr; 284 285 rr = (buf->data[buf->n_fetch - 1] >> 4) & 3; 286 if (rr == 3) /* SP is not supported */ 287 return 0; 288 289 snprintf (mytxt, TXTSIZ, txt, rr_str[rr]); 290 return prt_d (buf, info, mytxt); 291 } 292 293 static int 294 arit_r (struct buffer *buf, disassemble_info * info, const char *txt) 295 { 296 const char * const *arit; 297 298 if (buf->inss & INSS_EZ80) 299 arit = arit_str_ez80; 300 else if (buf->inss & INSS_GBZ80) 301 arit = arit_str_gbz80; 302 else 303 arit = arit_str; 304 305 info->fprintf_func (info->stream, txt, 306 arit[(buf->data[buf->n_fetch - 1] >> 3) & 7], 307 r_str[buf->data[buf->n_fetch - 1] & 7]); 308 buf->n_used = buf->n_fetch; 309 return buf->n_used; 310 } 311 312 static int 313 prt_cc (struct buffer *buf, disassemble_info * info, const char *txt) 314 { 315 info->fprintf_func (info->stream, "%s%s", txt, 316 cc_str[(buf->data[0] >> 3) & 7]); 317 buf->n_used = buf->n_fetch; 318 return buf->n_used; 319 } 320 321 static int 322 pop_rr (struct buffer *buf, disassemble_info * info, const char *txt) 323 { 324 static char *rr_stack[] = { "bc","de","hl","af"}; 325 326 info->fprintf_func (info->stream, "%s %s", txt, 327 rr_stack[(buf->data[0] >> 4) & 3]); 328 buf->n_used = buf->n_fetch; 329 return buf->n_used; 330 } 331 332 333 static int 334 jp_cc_nn (struct buffer *buf, disassemble_info * info, const char *txt) 335 { 336 char mytxt[TXTSIZ]; 337 338 snprintf (mytxt,TXTSIZ, 339 "%s%s,0x%%04x", txt, cc_str[(buf->data[0] >> 3) & 7]); 340 return prt_nn (buf, info, mytxt); 341 } 342 343 static int 344 arit_n (struct buffer *buf, disassemble_info * info, const char *txt) 345 { 346 char mytxt[TXTSIZ]; 347 const char * const *arit; 348 349 if (buf->inss & INSS_EZ80) 350 arit = arit_str_ez80; 351 else if (buf->inss & INSS_GBZ80) 352 arit = arit_str_gbz80; 353 else 354 arit = arit_str; 355 356 snprintf (mytxt,TXTSIZ, txt, arit[(buf->data[0] >> 3) & 7]); 357 return prt_n (buf, info, mytxt); 358 } 359 360 static int 361 rst (struct buffer *buf, disassemble_info * info, const char *txt) 362 { 363 info->fprintf_func (info->stream, txt, buf->data[0] & 0x38); 364 buf->n_used = buf->n_fetch; 365 return buf->n_used; 366 } 367 368 369 static int 370 cis (struct buffer *buf, disassemble_info * info, const char *txt ATTRIBUTE_UNUSED) 371 { 372 static char * opar[] = { "ld", "cp", "in", "out" }; 373 char * op; 374 char c; 375 376 c = buf->data[1]; 377 op = ((0x13 & c) == 0x13) ? "ot" : (opar[c & 3]); 378 info->fprintf_func (info->stream, 379 "%s%c%s", op, 380 (c & 0x08) ? 'd' : 'i', 381 (c & 0x10) ? "r" : ""); 382 buf->n_used = 2; 383 return buf->n_used; 384 } 385 386 static int 387 cism (struct buffer *buf, disassemble_info * info, const char *txt ATTRIBUTE_UNUSED) 388 { 389 static char * opar[] = { "in%cm%s", "ot%cm%s" }; 390 char * op; 391 char c; 392 393 c = buf->data[1]; 394 op = opar[c & 1]; 395 info->fprintf_func (info->stream, 396 op, 397 (c & 0x08) ? 'd' : 'i', 398 (c & 0x10) ? "r" : ""); 399 buf->n_used = 2; 400 return buf->n_used; 401 } 402 403 static int 404 dump (struct buffer *buf, disassemble_info * info, const char *txt) 405 { 406 int i; 407 408 info->fprintf_func (info->stream, "defb "); 409 for (i = 0; txt[i]; ++i) 410 info->fprintf_func (info->stream, i ? ", 0x%02x" : "0x%02x", 411 (unsigned char) buf->data[i]); 412 buf->n_used = i; 413 return buf->n_used; 414 } 415 416 /* Table to disassemble machine codes with prefix 0xED. */ 417 struct tab_elt opc_ed[] = 418 { 419 { 0x30, 0xFF, prt, "mul d,e", INSS_Z80N }, 420 { 0x31, 0xFF, prt, "add hl,a", INSS_Z80N }, 421 { 0x31, 0xFF, prt, "ld iy,(hl)", INSS_EZ80 }, 422 { 0x30, 0xFE, dump, "xx", INSS_ALL }, /* do not move this line */ 423 { 0x00, 0xC7, prt_r_n, "in0 %s,(0x%%02x)", INSS_Z180|INSS_EZ80 }, 424 { 0x01, 0xC7, prt_r_n, "out0 (0x%%02x),%s", INSS_Z180|INSS_EZ80 }, 425 { 0x32, 0xFF, prt_d, "lea ix,ix%+d", INSS_EZ80 }, 426 { 0x33, 0xFF, prt_d, "lea iy,iy%+d", INSS_EZ80 }, 427 { 0x02, 0xCF, prt_rr_d, "lea %s,ix%%+d", INSS_EZ80 }, 428 { 0x03, 0xCF, prt_rr_d, "lea %s,iy%%+d", INSS_EZ80 }, 429 { 0x04, 0xC7, prt_r, "tst %s", INSS_Z180}, 430 { 0x04, 0xC7, prt_r, "tst a,%s", INSS_EZ80 }, 431 { 0x07, 0xFF, prt, "ld bc,(hl)", INSS_EZ80 }, 432 { 0x3F, 0xFF, prt, "ld (hl),ix", INSS_EZ80 }, 433 { 0x0F, 0xCF, prt_rr, "ld (hl),", INSS_EZ80 }, 434 { 0x17, 0xFF, prt, "ld de,(hl)", INSS_EZ80 }, 435 { 0x23, 0xFF, prt, "swapnib", INSS_Z80N }, 436 { 0x24, 0xFF, prt, "mirror", INSS_Z80N }, 437 { 0x27, 0xFF, prt, "ld hl,(hl)", INSS_EZ80 }, 438 { 0x27, 0xFF, prt_n, "test 0x%02x", INSS_Z80N }, 439 { 0x28, 0xFF, prt, "bsla de,b", INSS_Z80N }, 440 { 0x29, 0xFF, prt, "bsra de,b", INSS_Z80N }, 441 { 0x2A, 0xFF, prt, "bsrl de,b", INSS_Z80N }, 442 { 0x2B, 0xFF, prt, "bsrf de,b", INSS_Z80N }, 443 { 0x2C, 0xFF, prt, "bslc de,b", INSS_Z80N }, 444 { 0x32, 0xFF, prt, "add de,a", INSS_Z80N }, 445 { 0x33, 0xFF, prt, "add bc,a", INSS_Z80N }, 446 { 0x34, 0xFF, prt_nn, "add hl,0x%04x", INSS_Z80N }, 447 { 0x35, 0xFF, prt_nn, "add de,0x%04x", INSS_Z80N }, 448 { 0x36, 0xFF, prt_nn, "add bc,0x%04x", INSS_Z80N }, 449 { 0x37, 0xFF, prt, "ld ix,(hl)", INSS_EZ80 }, 450 { 0x3E, 0xFF, prt, "ld (hl),iy", INSS_EZ80 }, 451 { 0x70, 0xFF, prt, "in f,(c)", INSS_Z80 | INSS_R800 | INSS_Z80N }, 452 { 0x70, 0xFF, dump, "xx", INSS_ALL }, 453 { 0x40, 0xC7, prt_r, "in %s,(bc)", INSS_EZ80 }, 454 { 0x40, 0xC7, prt_r, "in %s,(c)", INSS_ALL }, 455 { 0x71, 0xFF, prt, "out (c),0", INSS_Z80 | INSS_Z80N }, 456 { 0x71, 0xFF, dump, "xx", INSS_ALL }, 457 { 0x41, 0xC7, prt_r, "out (bc),%s", INSS_EZ80 }, 458 { 0x41, 0xC7, prt_r, "out (c),%s", INSS_ALL }, 459 { 0x42, 0xCF, prt_rr, "sbc hl,", INSS_ALL }, 460 { 0x43, 0xCF, prt_rr_nn, "ld (0x%%04x),%s", INSS_ALL }, 461 { 0x44, 0xFF, prt, "neg", INSS_ALL }, 462 { 0x45, 0xFF, prt, "retn", INSS_ALL }, 463 { 0x46, 0xFF, prt, "im 0", INSS_ALL }, 464 { 0x47, 0xFF, prt, "ld i,a", INSS_ALL }, 465 { 0x4A, 0xCF, prt_rr, "adc hl,", INSS_ALL }, 466 { 0x4B, 0xCF, prt_rr_nn, "ld %s,(0x%%04x)", INSS_ALL }, 467 { 0x4C, 0xCF, prt_rr, "mlt ", INSS_Z180|INSS_EZ80 }, 468 { 0x4D, 0xFF, prt, "reti", INSS_ALL }, 469 { 0x4F, 0xFF, prt, "ld r,a", INSS_ALL }, 470 { 0x54, 0xFF, prt_d, "lea ix,iy%+d", INSS_EZ80 }, 471 { 0x55, 0xFF, prt_d, "lea iy,ix%+d", INSS_EZ80 }, 472 { 0x56, 0xFF, prt, "im 1", INSS_ALL }, 473 { 0x57, 0xFF, prt, "ld a,i", INSS_ALL }, 474 { 0x5E, 0xFF, prt, "im 2", INSS_ALL }, 475 { 0x5F, 0xFF, prt, "ld a,r", INSS_ALL }, 476 { 0x64, 0xFF, prt_n, "tst 0x%02x", INSS_Z180 }, 477 { 0x64, 0xFF, prt_n, "tst a,0x%02x", INSS_EZ80 }, 478 { 0x65, 0xFF, prt_d, "pea ix%+d", INSS_EZ80 }, 479 { 0x66, 0xFF, prt_d, "pea iy%+d", INSS_EZ80 }, 480 { 0x67, 0xFF, prt, "rrd", INSS_ALL }, 481 { 0x6D, 0xFF, prt, "ld mb,a", INSS_EZ80 }, 482 { 0x6E, 0xFF, prt, "ld a,mb", INSS_EZ80 }, 483 { 0x6F, 0xFF, prt, "rld", INSS_ALL }, 484 { 0x74, 0xFF, prt_n, "tstio 0x%02x", INSS_Z180|INSS_EZ80 }, 485 { 0x76, 0xFF, prt, "slp", INSS_Z180|INSS_EZ80 }, 486 { 0x7D, 0xFF, prt, "stmix", INSS_EZ80 }, 487 { 0x7E, 0xFF, prt, "rsmix", INSS_EZ80 }, 488 { 0x82, 0xE6, cism, "", INSS_Z180|INSS_EZ80 }, 489 { 0x84, 0xFF, prt, "ini2", INSS_EZ80 }, 490 { 0x8A, 0xFF, prt_n_n, "push 0x%02x%%02x", INSS_Z80N }, 491 { 0x8C, 0xFF, prt, "ind2", INSS_EZ80 }, 492 { 0x90, 0xFF, prt, "outinb", INSS_Z80N }, 493 { 0x91, 0xFF, prt_n_n, "nextreg 0x%02x,0x%%02x", INSS_Z80N }, 494 { 0x92, 0xFF, prt_n, "nextreg 0x%02x,a", INSS_Z80N }, 495 { 0x93, 0xFF, prt, "pixeldn", INSS_Z80N }, 496 { 0x94, 0xFF, prt, "ini2r", INSS_EZ80 }, 497 { 0x94, 0xFF, prt, "pixelad", INSS_Z80N }, 498 { 0x95, 0xFF, prt, "setae", INSS_Z80N }, 499 { 0x98, 0xFF, prt, "jp (c)", INSS_Z80N }, 500 { 0x9c, 0xFF, prt, "ind2r", INSS_EZ80 }, 501 { 0xA0, 0xE4, cis, "", INSS_ALL }, 502 { 0xA4, 0xFF, prt, "outi2", INSS_EZ80 }, 503 { 0xA4, 0xFF, prt, "ldix", INSS_Z80N }, 504 { 0xAC, 0xFF, prt, "outd2", INSS_EZ80 }, 505 { 0xAC, 0xFF, prt, "lddx", INSS_Z80N }, 506 { 0xA5, 0xFF, prt, "ldws", INSS_Z80N }, 507 { 0xB4, 0xFF, prt, "oti2r", INSS_EZ80 }, 508 { 0xB4, 0xFF, prt, "ldirx", INSS_Z80N }, 509 { 0xB7, 0xFF, prt, "ldpirx", INSS_Z80N }, 510 { 0xBC, 0xFF, prt, "otd2r", INSS_EZ80 }, 511 { 0xBC, 0xFF, prt, "lddrx", INSS_Z80N }, 512 { 0xC2, 0xFF, prt, "inirx", INSS_EZ80 }, 513 { 0xC3, 0xFF, prt, "otirx", INSS_EZ80 }, 514 { 0xC7, 0xFF, prt, "ld i,hl", INSS_EZ80 }, 515 { 0xCA, 0xFF, prt, "indrx", INSS_EZ80 }, 516 { 0xCB, 0xFF, prt, "otdrx", INSS_EZ80 }, 517 { 0xC3, 0xFF, prt, "muluw hl,bc", INSS_R800 }, 518 { 0xC5, 0xE7, prt_r, "mulub a,%s", INSS_R800 }, 519 { 0xD7, 0xFF, prt, "ld hl,i", INSS_EZ80 }, 520 { 0xF3, 0xFF, prt, "muluw hl,sp", INSS_R800 }, 521 { 0x00, 0x00, dump, "xx", INSS_ALL } 522 }; 523 524 static int 525 pref_ed (struct buffer *buf, disassemble_info *info, 526 const char *txt ATTRIBUTE_UNUSED) 527 { 528 struct tab_elt *p; 529 530 if (fetch_data (buf, info, 1)) 531 { 532 for (p = opc_ed; p->val != (buf->data[1] & p->mask) || !mach_inst (buf, p); ++p) 533 ; 534 p->fp (buf, info, p->text); 535 } 536 else 537 buf->n_used = -1; 538 539 return buf->n_used; 540 } 541 542 /* Instruction names for the instructions addressing single bits. */ 543 static char *cb1_str[] = { "", "bit", "res", "set"}; 544 /* Instruction names for shifts and rotates. */ 545 static char *cb2_str[] = 546 { 547 "rlc", "rrc", "rl", "rr", "sla", "sra", "sli", "srl" 548 }; 549 550 static int 551 pref_cb (struct buffer *buf, disassemble_info *info, 552 const char *txt ATTRIBUTE_UNUSED) 553 { 554 const char *op_txt; 555 int idx; 556 if (fetch_data (buf, info, 1)) 557 { 558 buf->n_used = 2; 559 if ((buf->data[1] & 0xc0) == 0) 560 { 561 idx = (buf->data[1] >> 3) & 7; 562 if ((buf->inss & INSS_GBZ80) && (idx == 6)) 563 op_txt = "swap"; 564 else 565 op_txt = cb2_str[idx]; 566 info->fprintf_func (info->stream, "%s %s", 567 op_txt, 568 r_str[buf->data[1] & 7]); 569 } 570 else 571 info->fprintf_func (info->stream, "%s %d,%s", 572 cb1_str[(buf->data[1] >> 6) & 3], 573 (buf->data[1] >> 3) & 7, 574 r_str[buf->data[1] & 7]); 575 } 576 else 577 buf->n_used = -1; 578 579 return buf->n_used; 580 } 581 582 static int 583 addvv (struct buffer * buf, disassemble_info * info, const char *txt) 584 { 585 info->fprintf_func (info->stream, "add %s,%s", txt, txt); 586 587 return buf->n_used = buf->n_fetch; 588 } 589 590 static int 591 ld_v_v (struct buffer * buf, disassemble_info * info, const char *txt) 592 { 593 char mytxt[TXTSIZ]; 594 595 snprintf (mytxt, TXTSIZ, "ld %s%%s,%s%%s", txt, txt); 596 return ld_r_r (buf, info, mytxt); 597 } 598 599 static int 600 prt_d_n (struct buffer *buf, disassemble_info * info, const char *txt) 601 { 602 char mytxt[TXTSIZ]; 603 int d; 604 signed char *p; 605 606 p = buf->data + buf->n_fetch; 607 608 if (fetch_data (buf, info, 1)) 609 { 610 d = p[0]; 611 snprintf (mytxt, TXTSIZ, txt, d); 612 return prt_n (buf, info, mytxt); 613 } 614 else 615 buf->n_used = -1; 616 617 return buf->n_used; 618 } 619 620 static int 621 arit_d (struct buffer *buf, disassemble_info * info, const char *txt) 622 { 623 char mytxt[TXTSIZ]; 624 signed char c; 625 const char * const *arit; 626 627 arit = (buf->inss & INSS_EZ80) ? arit_str_ez80 : arit_str; 628 c = buf->data[buf->n_fetch - 1]; 629 snprintf (mytxt, TXTSIZ, txt, arit[(c >> 3) & 7]); 630 return prt_d (buf, info, mytxt); 631 } 632 633 static int 634 ld_r_d (struct buffer *buf, disassemble_info * info, const char *txt) 635 { 636 char mytxt[TXTSIZ]; 637 signed char c; 638 639 c = buf->data[buf->n_fetch - 1]; 640 snprintf (mytxt, TXTSIZ, txt, r_str[(c >> 3) & 7]); 641 return prt_d (buf, info, mytxt); 642 } 643 644 static int 645 ld_d_r (struct buffer *buf, disassemble_info * info, const char *txt) 646 { 647 char mytxt[TXTSIZ]; 648 signed char c; 649 650 c = buf->data[buf->n_fetch - 1]; 651 snprintf (mytxt, TXTSIZ, txt, r_str[c & 7]); 652 return prt_d (buf, info, mytxt); 653 } 654 655 static int 656 ld_ii_ii (struct buffer *buf, disassemble_info * info, const char *txt) 657 { 658 char mytxt[TXTSIZ]; 659 signed char c; 660 int p; 661 static const char *ii[2] = { "ix", "iy" }; 662 663 p = (buf->data[buf->n_fetch - 2] == (signed char) 0xdd) ? 0 : 1; 664 c = buf->data[buf->n_fetch - 1]; 665 if ((c & 0x07) != 0x07) 666 p = 1 - p; /* 0 -> 1, 1 -> 0 */ 667 snprintf (mytxt, TXTSIZ, txt, ii[p]); 668 return prt_d (buf, info, mytxt); 669 } 670 671 static int 672 pref_xd_cb (struct buffer * buf, disassemble_info * info, const char *txt) 673 { 674 if (fetch_data (buf, info, 2)) 675 { 676 int d; 677 char arg[TXTSIZ]; 678 signed char *p; 679 680 buf->n_used = 4; 681 p = buf->data; 682 d = p[2]; 683 684 if (((p[3] & 0xC0) == 0x40) || ((p[3] & 7) == 0x06)) 685 snprintf (arg, TXTSIZ, "(%s%+d)", txt, d); 686 else 687 snprintf (arg, TXTSIZ, "(%s%+d),%s", txt, d, r_str[p[3] & 7]); 688 689 if ((p[3] & 0xc0) == 0) 690 info->fprintf_func (info->stream, "%s %s", 691 cb2_str[(buf->data[3] >> 3) & 7], 692 arg); 693 else 694 info->fprintf_func (info->stream, "%s %d,%s", 695 cb1_str[(buf->data[3] >> 6) & 3], 696 (buf->data[3] >> 3) & 7, 697 arg); 698 } 699 else 700 buf->n_used = -1; 701 702 return buf->n_used; 703 } 704 705 /* Table to disassemble machine codes with prefix 0xDD or 0xFD. */ 706 static struct tab_elt opc_ind[] = 707 { 708 { 0x07, 0xFF, prt_d, "ld bc,(%s%%+d)", INSS_EZ80 }, 709 { 0x0F, 0xFF, prt_d, "ld (%s%%+d),bc", INSS_EZ80 }, 710 { 0x17, 0xFF, prt_d, "ld de,(%s%%+d)", INSS_EZ80 }, 711 { 0x1F, 0xFF, prt_d, "ld (%s%%+d),de", INSS_EZ80 }, 712 { 0x24, 0xF7, prt_r, "inc %s%%s", INSS_ALL }, 713 { 0x25, 0xF7, prt_r, "dec %s%%s", INSS_ALL }, 714 { 0x26, 0xF7, ld_r_n, "ld %s%%s,0x%%%%02x", INSS_ALL }, 715 { 0x27, 0xFF, prt_d, "ld hl,(%s%%+d)", INSS_EZ80 }, 716 { 0x2F, 0xFF, prt_d, "ld (%s%%+d),hl", INSS_EZ80 }, 717 { 0x21, 0xFF, prt_nn, "ld %s,0x%%04x", INSS_ALL }, 718 { 0x22, 0xFF, prt_nn, "ld (0x%%04x),%s", INSS_ALL }, 719 { 0x2A, 0xFF, prt_nn, "ld %s,(0x%%04x)", INSS_ALL }, 720 { 0x23, 0xFF, prt, "inc %s", INSS_ALL }, 721 { 0x2B, 0xFF, prt, "dec %s", INSS_ALL }, 722 { 0x29, 0xFF, addvv, "%s", INSS_ALL }, 723 { 0x31, 0xFF, ld_ii_ii, "ld %%s,(%s%%%%+d)", INSS_EZ80 }, 724 { 0x37, 0xFF, ld_ii_ii, "ld %%s,(%s%%%%+d)", INSS_EZ80 }, 725 { 0x3E, 0xFE, ld_ii_ii, "ld (%s%%%%+d),%%s", INSS_EZ80 }, 726 { 0x09, 0xCF, prt_rr, "add %s,", INSS_ALL }, 727 { 0x34, 0xFF, prt_d, "inc (%s%%+d)", INSS_ALL }, 728 { 0x35, 0xFF, prt_d, "dec (%s%%+d)", INSS_ALL }, 729 { 0x36, 0xFF, prt_d_n, "ld (%s%%+d),0x%%%%02x", INSS_ALL }, 730 731 { 0x76, 0xFF, dump, "h", INSS_ALL }, 732 { 0x46, 0xC7, ld_r_d, "ld %%s,(%s%%%%+d)", INSS_ALL }, 733 { 0x70, 0xF8, ld_d_r, "ld (%s%%%%+d),%%s", INSS_ALL }, 734 { 0x64, 0xF6, ld_v_v, "%s", INSS_ALL }, 735 { 0x60, 0xF0, ld_r_r, "ld %s%%s,%%s", INSS_ALL }, 736 { 0x44, 0xC6, ld_r_r, "ld %%s,%s%%s", INSS_ALL }, 737 738 { 0x86, 0xC7, arit_d, "%%s(%s%%%%+d)", INSS_ALL }, 739 { 0x84, 0xC6, arit_r, "%%s%s%%s", INSS_ALL }, 740 741 { 0xE1, 0xFF, prt, "pop %s", INSS_ALL }, 742 { 0xE5, 0xFF, prt, "push %s", INSS_ALL }, 743 { 0xCB, 0xFF, pref_xd_cb, "%s", INSS_ALL }, 744 { 0xE3, 0xFF, prt, "ex (sp),%s", INSS_ALL }, 745 { 0xE9, 0xFF, prt, "jp (%s)", INSS_ALL }, 746 { 0xF9, 0xFF, prt, "ld sp,%s", INSS_ALL }, 747 { 0x00, 0x00, dump, "?", INSS_ALL }, 748 } ; 749 750 static int 751 pref_ind (struct buffer *buf, disassemble_info *info, const char *txt) 752 { 753 if (fetch_data (buf, info, 1)) 754 { 755 char mytxt[TXTSIZ]; 756 struct tab_elt *p; 757 758 for (p = opc_ind; p->val != (buf->data[1] & p->mask) || !mach_inst (buf, p); ++p) 759 ; 760 snprintf (mytxt, TXTSIZ, p->text, txt); 761 p->fp (buf, info, mytxt); 762 } 763 else 764 buf->n_used = -1; 765 766 return buf->n_used; 767 } 768 769 static int 770 print_insn_z80_buf (struct buffer *buf, disassemble_info *info); 771 772 static int 773 suffix (struct buffer *buf, disassemble_info *info, const char *txt) 774 { 775 char mybuf[TXTSIZ*4]; 776 fprintf_ftype old_fprintf; 777 void *old_stream; 778 char *p; 779 780 switch (txt[2]) 781 { 782 case 'l': /* SIL or LIL */ 783 buf->nn_len = 3; 784 break; 785 case 's': /* SIS or LIS */ 786 buf->nn_len = 2; 787 break; 788 default: 789 abort (); 790 } 791 if (!fetch_data (buf, info, 1) 792 || buf->data[1] == 0x40 793 || buf->data[1] == 0x49 794 || buf->data[1] == 0x52 795 || buf->data[1] == 0x5b) 796 { 797 /* Double prefix, or end of data. */ 798 info->fprintf_func (info->stream, ".db 0x%02x ; %s", (unsigned)buf->data[0], txt); 799 buf->n_used = 1; 800 return buf->n_used; 801 } 802 803 old_fprintf = info->fprintf_func; 804 old_stream = info->stream; 805 info->fprintf_func = (fprintf_ftype) &sprintf; 806 info->stream = mybuf; 807 mybuf[0] = 0; 808 buf->base++; 809 if (print_insn_z80_buf (buf, info) >= 0) 810 buf->n_used++; 811 info->fprintf_func = old_fprintf; 812 info->stream = old_stream; 813 814 for (p = mybuf; *p; ++p) 815 if (*p == ' ') 816 break; 817 if (*p) 818 { 819 *p++ = '\0'; 820 info->fprintf_func (info->stream, "%s.%s %s", mybuf, txt, p); 821 } 822 else 823 info->fprintf_func (info->stream, "%s.%s", mybuf, txt); 824 return buf->n_used; 825 } 826 827 /* Table to disassemble machine codes without prefix. */ 828 static const struct tab_elt 829 opc_main[] = 830 { 831 { 0x00, 0xFF, prt, "nop", INSS_ALL }, 832 { 0x01, 0xCF, prt_rr_nn, "ld %s,0x%%04x", INSS_ALL }, 833 { 0x02, 0xFF, prt, "ld (bc),a", INSS_ALL }, 834 { 0x03, 0xCF, prt_rr, "inc ", INSS_ALL }, 835 { 0x04, 0xC7, prt_r, "inc %s", INSS_ALL }, 836 { 0x05, 0xC7, prt_r, "dec %s", INSS_ALL }, 837 { 0x06, 0xC7, ld_r_n, "ld %s,0x%%02x", INSS_ALL }, 838 { 0x07, 0xFF, prt, "rlca", INSS_ALL }, 839 { 0x08, 0xFF, prt, "ex af,af'", ~INSS_GBZ80 }, 840 { 0x09, 0xCF, prt_rr, "add hl,", INSS_ALL }, 841 { 0x0A, 0xFF, prt, "ld a,(bc)", INSS_ALL }, 842 { 0x0B, 0xCF, prt_rr, "dec ", INSS_ALL }, 843 { 0x0F, 0xFF, prt, "rrca", INSS_ALL }, 844 { 0x10, 0xFF, prt_e, "djnz ", ~INSS_GBZ80 }, 845 { 0x12, 0xFF, prt, "ld (de),a", INSS_ALL }, 846 { 0x17, 0xFF, prt, "rla", INSS_ALL }, 847 { 0x18, 0xFF, prt_e, "jr ", INSS_ALL }, 848 { 0x1A, 0xFF, prt, "ld a,(de)", INSS_ALL }, 849 { 0x1F, 0xFF, prt, "rra", INSS_ALL }, 850 { 0x20, 0xE7, jr_cc, "jr %s,", INSS_ALL }, 851 { 0x22, 0xFF, prt_nn, "ld (0x%04x),hl", ~INSS_GBZ80 }, 852 { 0x27, 0xFF, prt, "daa", INSS_ALL }, 853 { 0x2A, 0xFF, prt_nn, "ld hl,(0x%04x)", ~INSS_GBZ80 }, 854 { 0x2F, 0xFF, prt, "cpl", INSS_ALL }, 855 { 0x32, 0xFF, prt_nn, "ld (0x%04x),a", INSS_ALL }, 856 { 0x37, 0xFF, prt, "scf", INSS_ALL }, 857 { 0x3A, 0xFF, prt_nn, "ld a,(0x%04x)", INSS_ALL }, 858 { 0x3F, 0xFF, prt, "ccf", INSS_ALL }, 859 860 { 0x76, 0xFF, prt, "halt", INSS_ALL }, 861 862 { 0x40, 0xFF, suffix, "sis", INSS_EZ80 }, 863 { 0x49, 0xFF, suffix, "lis", INSS_EZ80 }, 864 { 0x52, 0xFF, suffix, "sil", INSS_EZ80 }, 865 { 0x5B, 0xFF, suffix, "lil", INSS_EZ80 }, 866 867 { 0x40, 0xC0, ld_r_r, "ld %s,%s", INSS_ALL}, 868 869 { 0x80, 0xC0, arit_r, "%s%s", INSS_ALL }, 870 871 { 0xC0, 0xC7, prt_cc, "ret ", INSS_ALL }, 872 { 0xC1, 0xCF, pop_rr, "pop", INSS_ALL }, 873 { 0xC2, 0xC7, jp_cc_nn, "jp ", INSS_ALL }, 874 { 0xC3, 0xFF, prt_nn, "jp 0x%04x", INSS_ALL }, 875 { 0xC4, 0xC7, jp_cc_nn, "call ", INSS_ALL }, 876 { 0xC5, 0xCF, pop_rr, "push", INSS_ALL }, 877 { 0xC6, 0xC7, arit_n, "%s0x%%02x", INSS_ALL }, 878 { 0xC7, 0xC7, rst, "rst 0x%02x", INSS_ALL }, 879 { 0xC9, 0xFF, prt, "ret", INSS_ALL }, 880 { 0xCB, 0xFF, pref_cb, "", INSS_ALL }, 881 { 0xCD, 0xFF, prt_nn, "call 0x%04x", INSS_ALL }, 882 { 0xD3, 0xFF, prt_n, "out (0x%02x),a", ~INSS_GBZ80 }, 883 { 0xD9, 0xFF, prt, "exx", ~INSS_GBZ80 }, 884 { 0xDB, 0xFF, prt_n, "in a,(0x%02x)", ~INSS_GBZ80 }, 885 { 0xDD, 0xFF, pref_ind, "ix", ~INSS_GBZ80 }, 886 { 0xE3, 0xFF, prt, "ex (sp),hl", ~INSS_GBZ80 }, 887 { 0xE9, 0xFF, prt, "jp (hl)", INSS_ALL }, 888 { 0xEB, 0xFF, prt, "ex de,hl", ~INSS_GBZ80 }, 889 { 0xED, 0xFF, pref_ed, "", ~INSS_GBZ80 }, 890 { 0xF3, 0xFF, prt, "di", INSS_ALL }, 891 { 0xF9, 0xFF, prt, "ld sp,hl", INSS_ALL }, 892 { 0xFB, 0xFF, prt, "ei", INSS_ALL }, 893 { 0xFD, 0xFF, pref_ind, "iy", ~INSS_GBZ80 }, 894 { 0x00, 0x00, prt, "????", INSS_ALL }, 895 } ; 896 897 /* Separate GBZ80 main opcode table due to many differences */ 898 static const struct tab_elt 899 opc_main_gbz80[] = 900 { 901 { 0x00, 0xFF, prt,"nop", INSS_ALL }, 902 { 0x01, 0xCF, prt_rr_nn, "ld %s,0x%%04x", INSS_ALL }, 903 { 0x02, 0xFF, prt, "ld (bc),a", INSS_ALL }, 904 { 0x03, 0xCF, prt_rr, "inc ", INSS_ALL }, 905 { 0x04, 0xC7, prt_r, "inc %s", INSS_ALL }, 906 { 0x05, 0xC7, prt_r, "dec %s", INSS_ALL }, 907 { 0x06, 0xC7, ld_r_n, "ld %s,0x%%02x", INSS_ALL }, 908 { 0x07, 0xFF, prt, "rlca", INSS_ALL }, 909 { 0x08, 0xFF, prt_nn, "ld (0x%04x),sp", INSS_GBZ80 }, 910 { 0x09, 0xCF, prt_rr, "add hl,", INSS_ALL }, 911 { 0x0A, 0xFF, prt, "ld a,(bc)", INSS_ALL }, 912 { 0x0B, 0xCF, prt_rr, "dec ", INSS_ALL }, 913 { 0x0F, 0xFF, prt, "rrca", INSS_ALL }, 914 { 0x10, 0xFF, prt, "stop", INSS_GBZ80 }, 915 { 0x12, 0xFF, prt, "ld (de),a", INSS_ALL }, 916 { 0x17, 0xFF, prt, "rla", INSS_ALL }, 917 { 0x18, 0xFF, prt_e, "jr ", INSS_ALL }, 918 { 0x1A, 0xFF, prt, "ld a,(de)", INSS_ALL }, 919 { 0x1F, 0xFF, prt, "rra", INSS_ALL }, 920 { 0x20, 0xE7, jr_cc, "jr %s,", INSS_ALL }, 921 { 0x22, 0xFF, prt, "ld (hl+),a", INSS_GBZ80 }, 922 { 0x27, 0xFF, prt, "daa", INSS_ALL }, 923 { 0x2A, 0xFF, prt, "ld a,(hl+)", INSS_GBZ80 }, 924 { 0x2F, 0xFF, prt, "cpl", INSS_ALL }, 925 { 0x32, 0xFF, prt, "ld (hl-),a", INSS_GBZ80 }, 926 { 0x37, 0xFF, prt, "scf", INSS_ALL }, 927 { 0x3A, 0xFF, prt, "ld a,(hl-)", INSS_GBZ80 }, 928 { 0x3F, 0xFF, prt, "ccf", INSS_ALL }, 929 { 0x76, 0xFF, prt, "halt", INSS_ALL }, 930 { 0x40, 0xC0, ld_r_r, "ld %s,%s", INSS_ALL}, 931 { 0x80, 0xC0, arit_r, "%s%s", INSS_ALL }, 932 { 0xC0, 0xE7, prt_cc, "ret ", INSS_ALL }, 933 { 0xC1, 0xCF, pop_rr, "pop", INSS_ALL }, 934 { 0xC2, 0xE7, jp_cc_nn, "jp ", INSS_ALL }, 935 { 0xC3, 0xFF, prt_nn, "jp 0x%04x", INSS_ALL }, 936 { 0xC4, 0xE7, jp_cc_nn, "call ", INSS_ALL }, 937 { 0xC5, 0xCF, pop_rr, "push", INSS_ALL }, 938 { 0xC6, 0xC7, arit_n, "%s0x%%02x", INSS_ALL }, 939 { 0xC7, 0xC7, rst, "rst 0x%02x", INSS_ALL }, 940 { 0xC9, 0xFF, prt, "ret", INSS_ALL }, 941 { 0xCB, 0xFF, pref_cb, "", INSS_ALL }, 942 { 0xCD, 0xFF, prt_nn, "call 0x%04x", INSS_ALL }, 943 { 0xD9, 0xFF, prt, "reti", INSS_GBZ80 }, 944 { 0xE0, 0xFF, prt_n, "ldh (0x%02x),a", INSS_GBZ80 }, 945 { 0xE2, 0xFF, prt, "ldh (c),a", INSS_GBZ80 }, 946 { 0xE8, 0xFF, prt_d, "add sp,%d", INSS_GBZ80 }, 947 { 0xE9, 0xFF, prt, "jp (hl)", INSS_ALL }, 948 { 0xEA, 0xFF, prt_nn, "ld (0x%04x),a", INSS_GBZ80 }, 949 { 0xF0, 0xFF, prt_n, "ldh a,(0x%02x)", INSS_GBZ80 }, 950 { 0xF2, 0xFF, prt, "ldh a,(c)", INSS_GBZ80 }, 951 { 0xF3, 0xFF, prt, "di", INSS_ALL }, 952 { 0xF8, 0xFF, prt_d, "ldhl sp,%d", INSS_GBZ80 }, 953 { 0xF9, 0xFF, prt, "ld sp,hl", INSS_ALL }, 954 { 0xFA, 0xFF, prt_nn, "ld a,(0x%04x)", INSS_GBZ80 }, 955 { 0xFB, 0xFF, prt, "ei", INSS_ALL }, 956 { 0x00, 0x00, dump, "?", INSS_ALL }, 957 } ; 958 959 int 960 print_insn_z80 (bfd_vma addr, disassemble_info * info) 961 { 962 struct buffer buf; 963 964 buf.base = addr; 965 buf.inss = 1 << info->mach; 966 buf.nn_len = info->mach == bfd_mach_ez80_adl ? 3 : 2; 967 info->bytes_per_line = (buf.inss & INSS_EZ80) ? 6 : 4; /* <ss pp oo nn mm MM> OR <pp oo nn mm> */ 968 969 return print_insn_z80_buf (&buf, info); 970 } 971 972 static int 973 print_insn_z80_buf (struct buffer *buf, disassemble_info *info) 974 { 975 const struct tab_elt *p; 976 977 buf->n_fetch = 0; 978 buf->n_used = 0; 979 if (! fetch_data (buf, info, 1)) 980 return -1; 981 982 p = (buf->inss & INSS_GBZ80) ? opc_main_gbz80 : opc_main; 983 984 for (; p->val != (buf->data[0] & p->mask) || !mach_inst (buf, p); ++p) 985 ; 986 p->fp (buf, info, p->text); 987 988 return buf->n_used; 989 } 990