z80-dis.c revision 1.1.1.7
1/* Print Z80, Z180, EZ80 and R800 instructions 2 Copyright (C) 2005-2022 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 26struct 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 36typedef int (*func)(struct buffer *, disassemble_info *, const char *); 37 38struct 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. */ 59static const char * rr_str[] = { "bc", "de", "hl", "sp" }; 60/* Names of 8-bit registers. */ 61static const char * r_str[] = { "b", "c", "d", "e", "h", "l", "(hl)", "a" }; 62/* Texts for condition codes. */ 63static const char * cc_str[] = { "nz", "z", "nc", "c", "po", "pe", "p", "m" }; 64/* Instruction names for 8-bit arithmetic, operand "a" is often implicit */ 65static const char * arit_str[] = 66{ 67 "add a,", "adc a,", "sub ", "sbc a,", "and ", "xor ", "or ", "cp " 68} ; 69static const char * arit_str_gbz80[] = 70{ 71 "add a,", "adc a,", "sub a,", "sbc a,", "and ", "xor ", "or ", "cp " 72} ; 73static 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 79static int 80mach_inst (struct buffer *buf, const struct tab_elt *p) 81{ 82 return !p->inss || (p->inss & buf->inss); 83} 84 85static int 86fetch_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 else 99 info->memory_error_func (r, buf->base + buf->n_fetch, info); 100 return !r; 101} 102 103static int 104prt (struct buffer *buf, disassemble_info * info, const char *txt) 105{ 106 info->fprintf_func (info->stream, "%s", txt); 107 buf->n_used = buf->n_fetch; 108 return 1; 109} 110 111static int 112prt_e (struct buffer *buf, disassemble_info * info, const char *txt) 113{ 114 char e; 115 int target_addr; 116 117 if (fetch_data (buf, info, 1)) 118 { 119 e = buf->data[1]; 120 target_addr = (buf->base + 2 + e) & 0xffff; 121 buf->n_used = buf->n_fetch; 122 info->fprintf_func (info->stream, "%s0x%04x", txt, target_addr); 123 } 124 else 125 buf->n_used = -1; 126 127 return buf->n_used; 128} 129 130static int 131jr_cc (struct buffer *buf, disassemble_info * info, const char *txt) 132{ 133 char mytxt[TXTSIZ]; 134 135 snprintf (mytxt, TXTSIZ, txt, cc_str[(buf->data[0] >> 3) & 3]); 136 return prt_e (buf, info, mytxt); 137} 138 139static int 140prt_nn (struct buffer *buf, disassemble_info * info, const char *txt) 141{ 142 int nn; 143 unsigned char *p; 144 int i; 145 146 p = (unsigned char*) buf->data + buf->n_fetch; 147 if (fetch_data (buf, info, buf->nn_len)) 148 { 149 nn = 0; 150 i = buf->nn_len; 151 while (i--) 152 nn = nn * 0x100 + p[i]; 153 info->fprintf_func (info->stream, txt, nn); 154 buf->n_used = buf->n_fetch; 155 } 156 else 157 buf->n_used = -1; 158 return buf->n_used; 159} 160 161static int 162prt_rr_nn (struct buffer *buf, disassemble_info * info, const char *txt) 163{ 164 char mytxt[TXTSIZ]; 165 int rr; 166 167 rr = (buf->data[buf->n_fetch - 1] >> 4) & 3; 168 snprintf (mytxt, TXTSIZ, txt, rr_str[rr]); 169 return prt_nn (buf, info, mytxt); 170} 171 172static int 173prt_rr (struct buffer *buf, disassemble_info * info, const char *txt) 174{ 175 info->fprintf_func (info->stream, "%s%s", txt, 176 rr_str[(buf->data[buf->n_fetch - 1] >> 4) & 3]); 177 buf->n_used = buf->n_fetch; 178 return buf->n_used; 179} 180 181static int 182prt_n (struct buffer *buf, disassemble_info * info, const char *txt) 183{ 184 int n; 185 unsigned char *p; 186 187 p = (unsigned char*) buf->data + buf->n_fetch; 188 189 if (fetch_data (buf, info, 1)) 190 { 191 n = p[0]; 192 info->fprintf_func (info->stream, txt, n); 193 buf->n_used = buf->n_fetch; 194 } 195 else 196 buf->n_used = -1; 197 198 return buf->n_used; 199} 200 201static int 202prt_n_n (struct buffer *buf, disassemble_info * info, const char *txt) 203{ 204 char mytxt[TXTSIZ]; 205 int n; 206 unsigned char *p; 207 208 p = (unsigned char*) buf->data + buf->n_fetch; 209 210 if (fetch_data (buf, info, 1)) 211 { 212 n = p[0]; 213 snprintf (mytxt, TXTSIZ, txt, n); 214 buf->n_used = buf->n_fetch; 215 } 216 else 217 buf->n_used = -1; 218 219 return prt_n (buf, info, mytxt); 220} 221 222static int 223prt_r_n (struct buffer *buf, disassemble_info * info, const char *txt) 224{ 225 char mytxt[TXTSIZ]; 226 int r; 227 228 r = (buf->data[buf->n_fetch - 1] >> 3) & 7; 229 snprintf (mytxt, TXTSIZ, txt, r_str[r]); 230 return prt_n (buf, info, mytxt); 231} 232 233static int 234ld_r_n (struct buffer *buf, disassemble_info * info, const char *txt) 235{ 236 char mytxt[TXTSIZ]; 237 238 snprintf (mytxt, TXTSIZ, txt, r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7]); 239 return prt_n (buf, info, mytxt); 240} 241 242static int 243prt_r (struct buffer *buf, disassemble_info * info, const char *txt) 244{ 245 info->fprintf_func (info->stream, txt, 246 r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7]); 247 buf->n_used = buf->n_fetch; 248 return buf->n_used; 249} 250 251static int 252ld_r_r (struct buffer *buf, disassemble_info * info, const char *txt) 253{ 254 info->fprintf_func (info->stream, txt, 255 r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7], 256 r_str[buf->data[buf->n_fetch - 1] & 7]); 257 buf->n_used = buf->n_fetch; 258 return buf->n_used; 259} 260 261static int 262prt_d (struct buffer *buf, disassemble_info * info, const char *txt) 263{ 264 int d; 265 signed char *p; 266 267 p = buf->data + buf->n_fetch; 268 269 if (fetch_data (buf, info, 1)) 270 { 271 d = p[0]; 272 info->fprintf_func (info->stream, txt, d); 273 buf->n_used = buf->n_fetch; 274 } 275 else 276 buf->n_used = -1; 277 278 return buf->n_used; 279} 280 281static int 282prt_rr_d (struct buffer *buf, disassemble_info * info, const char *txt) 283{ 284 char mytxt[TXTSIZ]; 285 int rr; 286 287 rr = (buf->data[buf->n_fetch - 1] >> 4) & 3; 288 if (rr == 3) /* SP is not supported */ 289 return 0; 290 291 snprintf (mytxt, TXTSIZ, txt, rr_str[rr]); 292 return prt_d (buf, info, mytxt); 293} 294 295static int 296arit_r (struct buffer *buf, disassemble_info * info, const char *txt) 297{ 298 const char * const *arit; 299 300 if (buf->inss & INSS_EZ80) 301 arit = arit_str_ez80; 302 else if (buf->inss & INSS_GBZ80) 303 arit = arit_str_gbz80; 304 else 305 arit = arit_str; 306 307 info->fprintf_func (info->stream, txt, 308 arit[(buf->data[buf->n_fetch - 1] >> 3) & 7], 309 r_str[buf->data[buf->n_fetch - 1] & 7]); 310 buf->n_used = buf->n_fetch; 311 return buf->n_used; 312} 313 314static int 315prt_cc (struct buffer *buf, disassemble_info * info, const char *txt) 316{ 317 info->fprintf_func (info->stream, "%s%s", txt, 318 cc_str[(buf->data[0] >> 3) & 7]); 319 buf->n_used = buf->n_fetch; 320 return buf->n_used; 321} 322 323static int 324pop_rr (struct buffer *buf, disassemble_info * info, const char *txt) 325{ 326 static char *rr_stack[] = { "bc","de","hl","af"}; 327 328 info->fprintf_func (info->stream, "%s %s", txt, 329 rr_stack[(buf->data[0] >> 4) & 3]); 330 buf->n_used = buf->n_fetch; 331 return buf->n_used; 332} 333 334 335static int 336jp_cc_nn (struct buffer *buf, disassemble_info * info, const char *txt) 337{ 338 char mytxt[TXTSIZ]; 339 340 snprintf (mytxt,TXTSIZ, 341 "%s%s,0x%%04x", txt, cc_str[(buf->data[0] >> 3) & 7]); 342 return prt_nn (buf, info, mytxt); 343} 344 345static int 346arit_n (struct buffer *buf, disassemble_info * info, const char *txt) 347{ 348 char mytxt[TXTSIZ]; 349 const char * const *arit; 350 351 if (buf->inss & INSS_EZ80) 352 arit = arit_str_ez80; 353 else if (buf->inss & INSS_GBZ80) 354 arit = arit_str_gbz80; 355 else 356 arit = arit_str; 357 358 snprintf (mytxt,TXTSIZ, txt, arit[(buf->data[0] >> 3) & 7]); 359 return prt_n (buf, info, mytxt); 360} 361 362static int 363rst (struct buffer *buf, disassemble_info * info, const char *txt) 364{ 365 info->fprintf_func (info->stream, txt, buf->data[0] & 0x38); 366 buf->n_used = buf->n_fetch; 367 return buf->n_used; 368} 369 370 371static int 372cis (struct buffer *buf, disassemble_info * info, const char *txt ATTRIBUTE_UNUSED) 373{ 374 static char * opar[] = { "ld", "cp", "in", "out" }; 375 char * op; 376 char c; 377 378 c = buf->data[1]; 379 op = ((0x13 & c) == 0x13) ? "ot" : (opar[c & 3]); 380 info->fprintf_func (info->stream, 381 "%s%c%s", op, 382 (c & 0x08) ? 'd' : 'i', 383 (c & 0x10) ? "r" : ""); 384 buf->n_used = 2; 385 return buf->n_used; 386} 387 388static int 389cism (struct buffer *buf, disassemble_info * info, const char *txt ATTRIBUTE_UNUSED) 390{ 391 static char * opar[] = { "in%cm%s", "ot%cm%s" }; 392 char * op; 393 char c; 394 395 c = buf->data[1]; 396 op = opar[c & 1]; 397 info->fprintf_func (info->stream, 398 op, 399 (c & 0x08) ? 'd' : 'i', 400 (c & 0x10) ? "r" : ""); 401 buf->n_used = 2; 402 return buf->n_used; 403} 404 405static int 406dump (struct buffer *buf, disassemble_info * info, const char *txt) 407{ 408 int i; 409 410 info->fprintf_func (info->stream, "defb "); 411 for (i = 0; txt[i]; ++i) 412 info->fprintf_func (info->stream, i ? ", 0x%02x" : "0x%02x", 413 (unsigned char) buf->data[i]); 414 buf->n_used = i; 415 return buf->n_used; 416} 417 418/* Table to disassemble machine codes with prefix 0xED. */ 419static const struct tab_elt opc_ed[] = 420{ 421 { 0x30, 0xFF, prt, "mul d,e", INSS_Z80N }, 422 { 0x31, 0xFF, prt, "add hl,a", INSS_Z80N }, 423 { 0x31, 0xFF, prt, "ld iy,(hl)", INSS_EZ80 }, 424 { 0x30, 0xFE, dump, "xx", INSS_ALL }, /* do not move this line */ 425 { 0x00, 0xC7, prt_r_n, "in0 %s,(0x%%02x)", INSS_Z180|INSS_EZ80 }, 426 { 0x01, 0xC7, prt_r_n, "out0 (0x%%02x),%s", INSS_Z180|INSS_EZ80 }, 427 { 0x32, 0xFF, prt_d, "lea ix,ix%+d", INSS_EZ80 }, 428 { 0x33, 0xFF, prt_d, "lea iy,iy%+d", INSS_EZ80 }, 429 { 0x02, 0xCF, prt_rr_d, "lea %s,ix%%+d", INSS_EZ80 }, 430 { 0x03, 0xCF, prt_rr_d, "lea %s,iy%%+d", INSS_EZ80 }, 431 { 0x04, 0xC7, prt_r, "tst %s", INSS_Z180}, 432 { 0x04, 0xC7, prt_r, "tst a,%s", INSS_EZ80 }, 433 { 0x07, 0xFF, prt, "ld bc,(hl)", INSS_EZ80 }, 434 { 0x3F, 0xFF, prt, "ld (hl),ix", INSS_EZ80 }, 435 { 0x0F, 0xCF, prt_rr, "ld (hl),", INSS_EZ80 }, 436 { 0x17, 0xFF, prt, "ld de,(hl)", INSS_EZ80 }, 437 { 0x23, 0xFF, prt, "swapnib", INSS_Z80N }, 438 { 0x24, 0xFF, prt, "mirror", INSS_Z80N }, 439 { 0x27, 0xFF, prt, "ld hl,(hl)", INSS_EZ80 }, 440 { 0x27, 0xFF, prt_n, "test 0x%02x", INSS_Z80N }, 441 { 0x28, 0xFF, prt, "bsla de,b", INSS_Z80N }, 442 { 0x29, 0xFF, prt, "bsra de,b", INSS_Z80N }, 443 { 0x2A, 0xFF, prt, "bsrl de,b", INSS_Z80N }, 444 { 0x2B, 0xFF, prt, "bsrf de,b", INSS_Z80N }, 445 { 0x2C, 0xFF, prt, "bslc de,b", INSS_Z80N }, 446 { 0x32, 0xFF, prt, "add de,a", INSS_Z80N }, 447 { 0x33, 0xFF, prt, "add bc,a", INSS_Z80N }, 448 { 0x34, 0xFF, prt_nn, "add hl,0x%04x", INSS_Z80N }, 449 { 0x35, 0xFF, prt_nn, "add de,0x%04x", INSS_Z80N }, 450 { 0x36, 0xFF, prt_nn, "add bc,0x%04x", INSS_Z80N }, 451 { 0x37, 0xFF, prt, "ld ix,(hl)", INSS_EZ80 }, 452 { 0x3E, 0xFF, prt, "ld (hl),iy", INSS_EZ80 }, 453 { 0x70, 0xFF, prt, "in f,(c)", INSS_Z80 | INSS_R800 | INSS_Z80N }, 454 { 0x70, 0xFF, dump, "xx", INSS_ALL }, 455 { 0x40, 0xC7, prt_r, "in %s,(bc)", INSS_EZ80 }, 456 { 0x40, 0xC7, prt_r, "in %s,(c)", INSS_ALL }, 457 { 0x71, 0xFF, prt, "out (c),0", INSS_Z80 | INSS_Z80N }, 458 { 0x71, 0xFF, dump, "xx", INSS_ALL }, 459 { 0x41, 0xC7, prt_r, "out (bc),%s", INSS_EZ80 }, 460 { 0x41, 0xC7, prt_r, "out (c),%s", INSS_ALL }, 461 { 0x42, 0xCF, prt_rr, "sbc hl,", INSS_ALL }, 462 { 0x43, 0xCF, prt_rr_nn, "ld (0x%%04x),%s", INSS_ALL }, 463 { 0x44, 0xFF, prt, "neg", INSS_ALL }, 464 { 0x45, 0xFF, prt, "retn", INSS_ALL }, 465 { 0x46, 0xFF, prt, "im 0", INSS_ALL }, 466 { 0x47, 0xFF, prt, "ld i,a", INSS_ALL }, 467 { 0x4A, 0xCF, prt_rr, "adc hl,", INSS_ALL }, 468 { 0x4B, 0xCF, prt_rr_nn, "ld %s,(0x%%04x)", INSS_ALL }, 469 { 0x4C, 0xCF, prt_rr, "mlt ", INSS_Z180|INSS_EZ80 }, 470 { 0x4D, 0xFF, prt, "reti", INSS_ALL }, 471 { 0x4F, 0xFF, prt, "ld r,a", INSS_ALL }, 472 { 0x54, 0xFF, prt_d, "lea ix,iy%+d", INSS_EZ80 }, 473 { 0x55, 0xFF, prt_d, "lea iy,ix%+d", INSS_EZ80 }, 474 { 0x56, 0xFF, prt, "im 1", INSS_ALL }, 475 { 0x57, 0xFF, prt, "ld a,i", INSS_ALL }, 476 { 0x5E, 0xFF, prt, "im 2", INSS_ALL }, 477 { 0x5F, 0xFF, prt, "ld a,r", INSS_ALL }, 478 { 0x64, 0xFF, prt_n, "tst 0x%02x", INSS_Z180 }, 479 { 0x64, 0xFF, prt_n, "tst a,0x%02x", INSS_EZ80 }, 480 { 0x65, 0xFF, prt_d, "pea ix%+d", INSS_EZ80 }, 481 { 0x66, 0xFF, prt_d, "pea iy%+d", INSS_EZ80 }, 482 { 0x67, 0xFF, prt, "rrd", INSS_ALL }, 483 { 0x6D, 0xFF, prt, "ld mb,a", INSS_EZ80 }, 484 { 0x6E, 0xFF, prt, "ld a,mb", INSS_EZ80 }, 485 { 0x6F, 0xFF, prt, "rld", INSS_ALL }, 486 { 0x74, 0xFF, prt_n, "tstio 0x%02x", INSS_Z180|INSS_EZ80 }, 487 { 0x76, 0xFF, prt, "slp", INSS_Z180|INSS_EZ80 }, 488 { 0x7D, 0xFF, prt, "stmix", INSS_EZ80 }, 489 { 0x7E, 0xFF, prt, "rsmix", INSS_EZ80 }, 490 { 0x82, 0xE6, cism, "", INSS_Z180|INSS_EZ80 }, 491 { 0x84, 0xFF, prt, "ini2", INSS_EZ80 }, 492 { 0x8A, 0xFF, prt_n_n, "push 0x%02x%%02x", INSS_Z80N }, 493 { 0x8C, 0xFF, prt, "ind2", INSS_EZ80 }, 494 { 0x90, 0xFF, prt, "outinb", INSS_Z80N }, 495 { 0x91, 0xFF, prt_n_n, "nextreg 0x%02x,0x%%02x", INSS_Z80N }, 496 { 0x92, 0xFF, prt_n, "nextreg 0x%02x,a", INSS_Z80N }, 497 { 0x93, 0xFF, prt, "pixeldn", INSS_Z80N }, 498 { 0x94, 0xFF, prt, "ini2r", INSS_EZ80 }, 499 { 0x94, 0xFF, prt, "pixelad", INSS_Z80N }, 500 { 0x95, 0xFF, prt, "setae", INSS_Z80N }, 501 { 0x98, 0xFF, prt, "jp (c)", INSS_Z80N }, 502 { 0x9c, 0xFF, prt, "ind2r", INSS_EZ80 }, 503 { 0xA0, 0xE4, cis, "", INSS_ALL }, 504 { 0xA4, 0xFF, prt, "outi2", INSS_EZ80 }, 505 { 0xA4, 0xFF, prt, "ldix", INSS_Z80N }, 506 { 0xAC, 0xFF, prt, "outd2", INSS_EZ80 }, 507 { 0xAC, 0xFF, prt, "lddx", INSS_Z80N }, 508 { 0xA5, 0xFF, prt, "ldws", INSS_Z80N }, 509 { 0xB4, 0xFF, prt, "oti2r", INSS_EZ80 }, 510 { 0xB4, 0xFF, prt, "ldirx", INSS_Z80N }, 511 { 0xB7, 0xFF, prt, "ldpirx", INSS_Z80N }, 512 { 0xBC, 0xFF, prt, "otd2r", INSS_EZ80 }, 513 { 0xBC, 0xFF, prt, "lddrx", INSS_Z80N }, 514 { 0xC2, 0xFF, prt, "inirx", INSS_EZ80 }, 515 { 0xC3, 0xFF, prt, "otirx", INSS_EZ80 }, 516 { 0xC7, 0xFF, prt, "ld i,hl", INSS_EZ80 }, 517 { 0xCA, 0xFF, prt, "indrx", INSS_EZ80 }, 518 { 0xCB, 0xFF, prt, "otdrx", INSS_EZ80 }, 519 { 0xC3, 0xFF, prt, "muluw hl,bc", INSS_R800 }, 520 { 0xC5, 0xE7, prt_r, "mulub a,%s", INSS_R800 }, 521 { 0xD7, 0xFF, prt, "ld hl,i", INSS_EZ80 }, 522 { 0xF3, 0xFF, prt, "muluw hl,sp", INSS_R800 }, 523 { 0x00, 0x00, dump, "xx", INSS_ALL } 524}; 525 526static int 527pref_ed (struct buffer *buf, disassemble_info *info, 528 const char *txt ATTRIBUTE_UNUSED) 529{ 530 const struct tab_elt *p; 531 532 if (fetch_data (buf, info, 1)) 533 { 534 for (p = opc_ed; p->val != (buf->data[1] & p->mask) || !mach_inst (buf, p); ++p) 535 ; 536 p->fp (buf, info, p->text); 537 } 538 else 539 buf->n_used = -1; 540 541 return buf->n_used; 542} 543 544/* Instruction names for the instructions addressing single bits. */ 545static char *cb1_str[] = { "", "bit", "res", "set"}; 546/* Instruction names for shifts and rotates. */ 547static char *cb2_str[] = 548{ 549 "rlc", "rrc", "rl", "rr", "sla", "sra", "sli", "srl" 550}; 551 552static int 553pref_cb (struct buffer *buf, disassemble_info *info, 554 const char *txt ATTRIBUTE_UNUSED) 555{ 556 const char *op_txt; 557 int idx; 558 if (fetch_data (buf, info, 1)) 559 { 560 buf->n_used = 2; 561 if ((buf->data[1] & 0xc0) == 0) 562 { 563 idx = (buf->data[1] >> 3) & 7; 564 if ((buf->inss & INSS_GBZ80) && (idx == 6)) 565 op_txt = "swap"; 566 else 567 op_txt = cb2_str[idx]; 568 info->fprintf_func (info->stream, "%s %s", 569 op_txt, 570 r_str[buf->data[1] & 7]); 571 } 572 else 573 info->fprintf_func (info->stream, "%s %d,%s", 574 cb1_str[(buf->data[1] >> 6) & 3], 575 (buf->data[1] >> 3) & 7, 576 r_str[buf->data[1] & 7]); 577 } 578 else 579 buf->n_used = -1; 580 581 return buf->n_used; 582} 583 584static int 585addvv (struct buffer * buf, disassemble_info * info, const char *txt) 586{ 587 info->fprintf_func (info->stream, "add %s,%s", txt, txt); 588 589 return buf->n_used = buf->n_fetch; 590} 591 592static int 593ld_v_v (struct buffer * buf, disassemble_info * info, const char *txt) 594{ 595 char mytxt[TXTSIZ]; 596 597 snprintf (mytxt, TXTSIZ, "ld %s%%s,%s%%s", txt, txt); 598 return ld_r_r (buf, info, mytxt); 599} 600 601static int 602prt_d_n (struct buffer *buf, disassemble_info * info, const char *txt) 603{ 604 char mytxt[TXTSIZ]; 605 int d; 606 signed char *p; 607 608 p = buf->data + buf->n_fetch; 609 610 if (fetch_data (buf, info, 1)) 611 { 612 d = p[0]; 613 snprintf (mytxt, TXTSIZ, txt, d); 614 return prt_n (buf, info, mytxt); 615 } 616 else 617 buf->n_used = -1; 618 619 return buf->n_used; 620} 621 622static int 623arit_d (struct buffer *buf, disassemble_info * info, const char *txt) 624{ 625 char mytxt[TXTSIZ]; 626 signed char c; 627 const char * const *arit; 628 629 arit = (buf->inss & INSS_EZ80) ? arit_str_ez80 : arit_str; 630 c = buf->data[buf->n_fetch - 1]; 631 snprintf (mytxt, TXTSIZ, txt, arit[(c >> 3) & 7]); 632 return prt_d (buf, info, mytxt); 633} 634 635static int 636ld_r_d (struct buffer *buf, disassemble_info * info, const char *txt) 637{ 638 char mytxt[TXTSIZ]; 639 signed char c; 640 641 c = buf->data[buf->n_fetch - 1]; 642 snprintf (mytxt, TXTSIZ, txt, r_str[(c >> 3) & 7]); 643 return prt_d (buf, info, mytxt); 644} 645 646static int 647ld_d_r (struct buffer *buf, disassemble_info * info, const char *txt) 648{ 649 char mytxt[TXTSIZ]; 650 signed char c; 651 652 c = buf->data[buf->n_fetch - 1]; 653 snprintf (mytxt, TXTSIZ, txt, r_str[c & 7]); 654 return prt_d (buf, info, mytxt); 655} 656 657static int 658ld_ii_ii (struct buffer *buf, disassemble_info * info, const char *txt) 659{ 660 char mytxt[TXTSIZ]; 661 signed char c; 662 int p; 663 static const char *ii[2] = { "ix", "iy" }; 664 665 p = (buf->data[buf->n_fetch - 2] == (signed char) 0xdd) ? 0 : 1; 666 c = buf->data[buf->n_fetch - 1]; 667 if ((c & 0x07) != 0x07) 668 p = 1 - p; /* 0 -> 1, 1 -> 0 */ 669 snprintf (mytxt, TXTSIZ, txt, ii[p]); 670 return prt_d (buf, info, mytxt); 671} 672 673static int 674pref_xd_cb (struct buffer * buf, disassemble_info * info, const char *txt) 675{ 676 if (fetch_data (buf, info, 2)) 677 { 678 int d; 679 char arg[TXTSIZ]; 680 signed char *p; 681 682 buf->n_used = 4; 683 p = buf->data; 684 d = p[2]; 685 686 if (((p[3] & 0xC0) == 0x40) || ((p[3] & 7) == 0x06)) 687 snprintf (arg, TXTSIZ, "(%s%+d)", txt, d); 688 else 689 snprintf (arg, TXTSIZ, "(%s%+d),%s", txt, d, r_str[p[3] & 7]); 690 691 if ((p[3] & 0xc0) == 0) 692 info->fprintf_func (info->stream, "%s %s", 693 cb2_str[(buf->data[3] >> 3) & 7], 694 arg); 695 else 696 info->fprintf_func (info->stream, "%s %d,%s", 697 cb1_str[(buf->data[3] >> 6) & 3], 698 (buf->data[3] >> 3) & 7, 699 arg); 700 } 701 else 702 buf->n_used = -1; 703 704 return buf->n_used; 705} 706 707/* Table to disassemble machine codes with prefix 0xDD or 0xFD. */ 708static struct tab_elt opc_ind[] = 709{ 710 { 0x07, 0xFF, prt_d, "ld bc,(%s%%+d)", INSS_EZ80 }, 711 { 0x0F, 0xFF, prt_d, "ld (%s%%+d),bc", INSS_EZ80 }, 712 { 0x17, 0xFF, prt_d, "ld de,(%s%%+d)", INSS_EZ80 }, 713 { 0x1F, 0xFF, prt_d, "ld (%s%%+d),de", INSS_EZ80 }, 714 { 0x24, 0xF7, prt_r, "inc %s%%s", INSS_ALL }, 715 { 0x25, 0xF7, prt_r, "dec %s%%s", INSS_ALL }, 716 { 0x26, 0xF7, ld_r_n, "ld %s%%s,0x%%%%02x", INSS_ALL }, 717 { 0x27, 0xFF, prt_d, "ld hl,(%s%%+d)", INSS_EZ80 }, 718 { 0x2F, 0xFF, prt_d, "ld (%s%%+d),hl", INSS_EZ80 }, 719 { 0x21, 0xFF, prt_nn, "ld %s,0x%%04x", INSS_ALL }, 720 { 0x22, 0xFF, prt_nn, "ld (0x%%04x),%s", INSS_ALL }, 721 { 0x2A, 0xFF, prt_nn, "ld %s,(0x%%04x)", INSS_ALL }, 722 { 0x23, 0xFF, prt, "inc %s", INSS_ALL }, 723 { 0x2B, 0xFF, prt, "dec %s", INSS_ALL }, 724 { 0x29, 0xFF, addvv, "%s", INSS_ALL }, 725 { 0x31, 0xFF, ld_ii_ii, "ld %%s,(%s%%%%+d)", INSS_EZ80 }, 726 { 0x37, 0xFF, ld_ii_ii, "ld %%s,(%s%%%%+d)", INSS_EZ80 }, 727 { 0x3E, 0xFE, ld_ii_ii, "ld (%s%%%%+d),%%s", INSS_EZ80 }, 728 { 0x09, 0xCF, prt_rr, "add %s,", INSS_ALL }, 729 { 0x34, 0xFF, prt_d, "inc (%s%%+d)", INSS_ALL }, 730 { 0x35, 0xFF, prt_d, "dec (%s%%+d)", INSS_ALL }, 731 { 0x36, 0xFF, prt_d_n, "ld (%s%%+d),0x%%%%02x", INSS_ALL }, 732 733 { 0x76, 0xFF, dump, "h", INSS_ALL }, 734 { 0x46, 0xC7, ld_r_d, "ld %%s,(%s%%%%+d)", INSS_ALL }, 735 { 0x70, 0xF8, ld_d_r, "ld (%s%%%%+d),%%s", INSS_ALL }, 736 { 0x64, 0xF6, ld_v_v, "%s", INSS_ALL }, 737 { 0x60, 0xF0, ld_r_r, "ld %s%%s,%%s", INSS_ALL }, 738 { 0x44, 0xC6, ld_r_r, "ld %%s,%s%%s", INSS_ALL }, 739 740 { 0x86, 0xC7, arit_d, "%%s(%s%%%%+d)", INSS_ALL }, 741 { 0x84, 0xC6, arit_r, "%%s%s%%s", INSS_ALL }, 742 743 { 0xE1, 0xFF, prt, "pop %s", INSS_ALL }, 744 { 0xE5, 0xFF, prt, "push %s", INSS_ALL }, 745 { 0xCB, 0xFF, pref_xd_cb, "%s", INSS_ALL }, 746 { 0xE3, 0xFF, prt, "ex (sp),%s", INSS_ALL }, 747 { 0xE9, 0xFF, prt, "jp (%s)", INSS_ALL }, 748 { 0xF9, 0xFF, prt, "ld sp,%s", INSS_ALL }, 749 { 0x00, 0x00, dump, "?", INSS_ALL }, 750} ; 751 752static int 753pref_ind (struct buffer *buf, disassemble_info *info, const char *txt) 754{ 755 if (fetch_data (buf, info, 1)) 756 { 757 char mytxt[TXTSIZ]; 758 struct tab_elt *p; 759 760 for (p = opc_ind; p->val != (buf->data[1] & p->mask) || !mach_inst (buf, p); ++p) 761 ; 762 snprintf (mytxt, TXTSIZ, p->text, txt); 763 p->fp (buf, info, mytxt); 764 } 765 else 766 buf->n_used = -1; 767 768 return buf->n_used; 769} 770 771static int 772print_insn_z80_buf (struct buffer *buf, disassemble_info *info); 773 774static int 775suffix (struct buffer *buf, disassemble_info *info, const char *txt) 776{ 777 char mybuf[TXTSIZ*4]; 778 fprintf_ftype old_fprintf; 779 void *old_stream; 780 char *p; 781 782 switch (txt[2]) 783 { 784 case 'l': /* SIL or LIL */ 785 buf->nn_len = 3; 786 break; 787 case 's': /* SIS or LIS */ 788 buf->nn_len = 2; 789 break; 790 default: 791 abort (); 792 } 793 if (!fetch_data (buf, info, 1) 794 || buf->data[1] == 0x40 795 || buf->data[1] == 0x49 796 || buf->data[1] == 0x52 797 || buf->data[1] == 0x5b) 798 { 799 /* Double prefix, or end of data. */ 800 info->fprintf_func (info->stream, ".db 0x%02x ; %s", (unsigned)buf->data[0], txt); 801 buf->n_used = 1; 802 return buf->n_used; 803 } 804 805 old_fprintf = info->fprintf_func; 806 old_stream = info->stream; 807 info->fprintf_func = (fprintf_ftype) &sprintf; 808 info->stream = mybuf; 809 mybuf[0] = 0; 810 buf->base++; 811 if (print_insn_z80_buf (buf, info) >= 0) 812 buf->n_used++; 813 info->fprintf_func = old_fprintf; 814 info->stream = old_stream; 815 816 for (p = mybuf; *p; ++p) 817 if (*p == ' ') 818 break; 819 if (*p) 820 { 821 *p++ = '\0'; 822 info->fprintf_func (info->stream, "%s.%s %s", mybuf, txt, p); 823 } 824 else 825 info->fprintf_func (info->stream, "%s.%s", mybuf, txt); 826 return buf->n_used; 827} 828 829/* Table to disassemble machine codes without prefix. */ 830static const struct tab_elt 831opc_main[] = 832{ 833 { 0x00, 0xFF, prt, "nop", INSS_ALL }, 834 { 0x01, 0xCF, prt_rr_nn, "ld %s,0x%%04x", INSS_ALL }, 835 { 0x02, 0xFF, prt, "ld (bc),a", INSS_ALL }, 836 { 0x03, 0xCF, prt_rr, "inc ", INSS_ALL }, 837 { 0x04, 0xC7, prt_r, "inc %s", INSS_ALL }, 838 { 0x05, 0xC7, prt_r, "dec %s", INSS_ALL }, 839 { 0x06, 0xC7, ld_r_n, "ld %s,0x%%02x", INSS_ALL }, 840 { 0x07, 0xFF, prt, "rlca", INSS_ALL }, 841 { 0x08, 0xFF, prt, "ex af,af'", ~INSS_GBZ80 }, 842 { 0x09, 0xCF, prt_rr, "add hl,", INSS_ALL }, 843 { 0x0A, 0xFF, prt, "ld a,(bc)", INSS_ALL }, 844 { 0x0B, 0xCF, prt_rr, "dec ", INSS_ALL }, 845 { 0x0F, 0xFF, prt, "rrca", INSS_ALL }, 846 { 0x10, 0xFF, prt_e, "djnz ", ~INSS_GBZ80 }, 847 { 0x12, 0xFF, prt, "ld (de),a", INSS_ALL }, 848 { 0x17, 0xFF, prt, "rla", INSS_ALL }, 849 { 0x18, 0xFF, prt_e, "jr ", INSS_ALL }, 850 { 0x1A, 0xFF, prt, "ld a,(de)", INSS_ALL }, 851 { 0x1F, 0xFF, prt, "rra", INSS_ALL }, 852 { 0x20, 0xE7, jr_cc, "jr %s,", INSS_ALL }, 853 { 0x22, 0xFF, prt_nn, "ld (0x%04x),hl", ~INSS_GBZ80 }, 854 { 0x27, 0xFF, prt, "daa", INSS_ALL }, 855 { 0x2A, 0xFF, prt_nn, "ld hl,(0x%04x)", ~INSS_GBZ80 }, 856 { 0x2F, 0xFF, prt, "cpl", INSS_ALL }, 857 { 0x32, 0xFF, prt_nn, "ld (0x%04x),a", INSS_ALL }, 858 { 0x37, 0xFF, prt, "scf", INSS_ALL }, 859 { 0x3A, 0xFF, prt_nn, "ld a,(0x%04x)", INSS_ALL }, 860 { 0x3F, 0xFF, prt, "ccf", INSS_ALL }, 861 862 { 0x76, 0xFF, prt, "halt", INSS_ALL }, 863 864 { 0x40, 0xFF, suffix, "sis", INSS_EZ80 }, 865 { 0x49, 0xFF, suffix, "lis", INSS_EZ80 }, 866 { 0x52, 0xFF, suffix, "sil", INSS_EZ80 }, 867 { 0x5B, 0xFF, suffix, "lil", INSS_EZ80 }, 868 869 { 0x40, 0xC0, ld_r_r, "ld %s,%s", INSS_ALL}, 870 871 { 0x80, 0xC0, arit_r, "%s%s", INSS_ALL }, 872 873 { 0xC0, 0xC7, prt_cc, "ret ", INSS_ALL }, 874 { 0xC1, 0xCF, pop_rr, "pop", INSS_ALL }, 875 { 0xC2, 0xC7, jp_cc_nn, "jp ", INSS_ALL }, 876 { 0xC3, 0xFF, prt_nn, "jp 0x%04x", INSS_ALL }, 877 { 0xC4, 0xC7, jp_cc_nn, "call ", INSS_ALL }, 878 { 0xC5, 0xCF, pop_rr, "push", INSS_ALL }, 879 { 0xC6, 0xC7, arit_n, "%s0x%%02x", INSS_ALL }, 880 { 0xC7, 0xC7, rst, "rst 0x%02x", INSS_ALL }, 881 { 0xC9, 0xFF, prt, "ret", INSS_ALL }, 882 { 0xCB, 0xFF, pref_cb, "", INSS_ALL }, 883 { 0xCD, 0xFF, prt_nn, "call 0x%04x", INSS_ALL }, 884 { 0xD3, 0xFF, prt_n, "out (0x%02x),a", ~INSS_GBZ80 }, 885 { 0xD9, 0xFF, prt, "exx", ~INSS_GBZ80 }, 886 { 0xDB, 0xFF, prt_n, "in a,(0x%02x)", ~INSS_GBZ80 }, 887 { 0xDD, 0xFF, pref_ind, "ix", ~INSS_GBZ80 }, 888 { 0xE3, 0xFF, prt, "ex (sp),hl", ~INSS_GBZ80 }, 889 { 0xE9, 0xFF, prt, "jp (hl)", INSS_ALL }, 890 { 0xEB, 0xFF, prt, "ex de,hl", ~INSS_GBZ80 }, 891 { 0xED, 0xFF, pref_ed, "", ~INSS_GBZ80 }, 892 { 0xF3, 0xFF, prt, "di", INSS_ALL }, 893 { 0xF9, 0xFF, prt, "ld sp,hl", INSS_ALL }, 894 { 0xFB, 0xFF, prt, "ei", INSS_ALL }, 895 { 0xFD, 0xFF, pref_ind, "iy", ~INSS_GBZ80 }, 896 { 0x00, 0x00, prt, "????", INSS_ALL }, 897} ; 898 899/* Separate GBZ80 main opcode table due to many differences */ 900static const struct tab_elt 901opc_main_gbz80[] = 902{ 903 { 0x00, 0xFF, prt,"nop", INSS_ALL }, 904 { 0x01, 0xCF, prt_rr_nn, "ld %s,0x%%04x", INSS_ALL }, 905 { 0x02, 0xFF, prt, "ld (bc),a", INSS_ALL }, 906 { 0x03, 0xCF, prt_rr, "inc ", INSS_ALL }, 907 { 0x04, 0xC7, prt_r, "inc %s", INSS_ALL }, 908 { 0x05, 0xC7, prt_r, "dec %s", INSS_ALL }, 909 { 0x06, 0xC7, ld_r_n, "ld %s,0x%%02x", INSS_ALL }, 910 { 0x07, 0xFF, prt, "rlca", INSS_ALL }, 911 { 0x08, 0xFF, prt_nn, "ld (0x%04x),sp", INSS_GBZ80 }, 912 { 0x09, 0xCF, prt_rr, "add hl,", INSS_ALL }, 913 { 0x0A, 0xFF, prt, "ld a,(bc)", INSS_ALL }, 914 { 0x0B, 0xCF, prt_rr, "dec ", INSS_ALL }, 915 { 0x0F, 0xFF, prt, "rrca", INSS_ALL }, 916 { 0x10, 0xFF, prt, "stop", INSS_GBZ80 }, 917 { 0x12, 0xFF, prt, "ld (de),a", INSS_ALL }, 918 { 0x17, 0xFF, prt, "rla", INSS_ALL }, 919 { 0x18, 0xFF, prt_e, "jr ", INSS_ALL }, 920 { 0x1A, 0xFF, prt, "ld a,(de)", INSS_ALL }, 921 { 0x1F, 0xFF, prt, "rra", INSS_ALL }, 922 { 0x20, 0xE7, jr_cc, "jr %s,", INSS_ALL }, 923 { 0x22, 0xFF, prt, "ld (hl+),a", INSS_GBZ80 }, 924 { 0x27, 0xFF, prt, "daa", INSS_ALL }, 925 { 0x2A, 0xFF, prt, "ld a,(hl+)", INSS_GBZ80 }, 926 { 0x2F, 0xFF, prt, "cpl", INSS_ALL }, 927 { 0x32, 0xFF, prt, "ld (hl-),a", INSS_GBZ80 }, 928 { 0x37, 0xFF, prt, "scf", INSS_ALL }, 929 { 0x3A, 0xFF, prt, "ld a,(hl-)", INSS_GBZ80 }, 930 { 0x3F, 0xFF, prt, "ccf", INSS_ALL }, 931 { 0x76, 0xFF, prt, "halt", INSS_ALL }, 932 { 0x40, 0xC0, ld_r_r, "ld %s,%s", INSS_ALL}, 933 { 0x80, 0xC0, arit_r, "%s%s", INSS_ALL }, 934 { 0xC0, 0xE7, prt_cc, "ret ", INSS_ALL }, 935 { 0xC1, 0xCF, pop_rr, "pop", INSS_ALL }, 936 { 0xC2, 0xE7, jp_cc_nn, "jp ", INSS_ALL }, 937 { 0xC3, 0xFF, prt_nn, "jp 0x%04x", INSS_ALL }, 938 { 0xC4, 0xE7, jp_cc_nn, "call ", INSS_ALL }, 939 { 0xC5, 0xCF, pop_rr, "push", INSS_ALL }, 940 { 0xC6, 0xC7, arit_n, "%s0x%%02x", INSS_ALL }, 941 { 0xC7, 0xC7, rst, "rst 0x%02x", INSS_ALL }, 942 { 0xC9, 0xFF, prt, "ret", INSS_ALL }, 943 { 0xCB, 0xFF, pref_cb, "", INSS_ALL }, 944 { 0xCD, 0xFF, prt_nn, "call 0x%04x", INSS_ALL }, 945 { 0xD9, 0xFF, prt, "reti", INSS_GBZ80 }, 946 { 0xE0, 0xFF, prt_n, "ldh (0x%02x),a", INSS_GBZ80 }, 947 { 0xE2, 0xFF, prt, "ldh (c),a", INSS_GBZ80 }, 948 { 0xE8, 0xFF, prt_d, "add sp,%d", INSS_GBZ80 }, 949 { 0xE9, 0xFF, prt, "jp (hl)", INSS_ALL }, 950 { 0xEA, 0xFF, prt_nn, "ld (0x%04x),a", INSS_GBZ80 }, 951 { 0xF0, 0xFF, prt_n, "ldh a,(0x%02x)", INSS_GBZ80 }, 952 { 0xF2, 0xFF, prt, "ldh a,(c)", INSS_GBZ80 }, 953 { 0xF3, 0xFF, prt, "di", INSS_ALL }, 954 { 0xF8, 0xFF, prt_d, "ldhl sp,%d", INSS_GBZ80 }, 955 { 0xF9, 0xFF, prt, "ld sp,hl", INSS_ALL }, 956 { 0xFA, 0xFF, prt_nn, "ld a,(0x%04x)", INSS_GBZ80 }, 957 { 0xFB, 0xFF, prt, "ei", INSS_ALL }, 958 { 0x00, 0x00, dump, "?", INSS_ALL }, 959} ; 960 961int 962print_insn_z80 (bfd_vma addr, disassemble_info * info) 963{ 964 struct buffer buf; 965 966 buf.base = addr; 967 buf.inss = 1 << info->mach; 968 buf.nn_len = info->mach == bfd_mach_ez80_adl ? 3 : 2; 969 info->bytes_per_line = (buf.inss & INSS_EZ80) ? 6 : 4; /* <ss pp oo nn mm MM> OR <pp oo nn mm> */ 970 971 return print_insn_z80_buf (&buf, info); 972} 973 974static int 975print_insn_z80_buf (struct buffer *buf, disassemble_info *info) 976{ 977 const struct tab_elt *p; 978 979 buf->n_fetch = 0; 980 buf->n_used = 0; 981 if (! fetch_data (buf, info, 1)) 982 return -1; 983 984 p = (buf->inss & INSS_GBZ80) ? opc_main_gbz80 : opc_main; 985 986 for (; p->val != (buf->data[0] & p->mask) || !mach_inst (buf, p); ++p) 987 ; 988 p->fp (buf, info, p->text); 989 990 return buf->n_used; 991} 992