Mercurial > hg-old > index.cgi
annotate src/pseudo.c @ 52:b9856da2674a
Added file inclusion
| author | lost |
|---|---|
| date | Sun, 04 Jan 2009 20:16:38 +0000 |
| parents | e672232caffe |
| children | 493cb8ea50a0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 pseudo.c |
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3 Copyright © 2009 William Astle |
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4 |
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5 This file is part of LWASM. |
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6 |
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7 LWASM is free software: you can redistribute it and/or modify it under the |
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8 terms of the GNU General Public License as published by the Free Software |
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9 Foundation, either version 3 of the License, or (at your option) any later |
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10 version. |
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11 |
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12 This program is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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15 more details. |
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16 |
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17 You should have received a copy of the GNU General Public License along with |
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18 this program. If not, see <http://www.gnu.org/licenses/>. |
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19 |
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20 |
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21 This file implements the various pseudo operations. |
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22 */ |
| 0 | 23 |
| 24 #include <stdlib.h> | |
| 50 | 25 #include <string.h> |
| 0 | 26 #include "lwasm.h" |
| 27 #include "instab.h" | |
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28 #include "expr.h" |
| 52 | 29 #include "util.h" |
| 0 | 30 |
| 52 | 31 extern int lwasm_read_file(asmstate_t *as, const char *filename); |
| 0 | 32 |
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33 OPFUNC(pseudo_org) |
| 0 | 34 { |
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35 int rval; |
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36 lwasm_expr_stack_t *s; |
| 52 | 37 |
| 38 if (as -> passnum != 1) | |
| 39 { | |
| 40 // org is not needed to be processed on pass 2 | |
| 41 // this will prevent phasing errors for forward references that | |
| 42 // resolve on the second pass | |
| 43 // we saved the org address in l -> codeaddr on pass 1 | |
| 44 as -> addr = l -> codeaddr; | |
| 45 return; | |
| 46 } | |
| 0 | 47 |
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48 if (l -> sym) |
| 0 | 49 { |
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50 register_error(as, l, 1, "No symbol allowed with ORG"); |
| 0 | 51 } |
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52 s = lwasm_evaluate_expr(as, l, *p, NULL); |
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53 if (!s) |
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54 { |
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55 register_error(as, l, 1, "Bad expression"); |
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56 return; |
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57 } |
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58 if (!lwasm_expr_is_constant(s)) |
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59 { |
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60 register_error(as, l, 1, "Illegal incomplete reference (pass 1)"); |
| 50 | 61 lwasm_expr_stack_free(s); |
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62 return; |
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63 } |
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64 rval = lwasm_expr_get_value(s) & 0xffff; |
| 50 | 65 lwasm_expr_stack_free(s); |
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66 l -> codeaddr = rval; |
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67 l -> addrset = 1; |
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68 as -> addr = rval; |
| 0 | 69 } |
| 70 | |
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71 /* |
| 52 | 72 The operand for include is a string optionally enclosed in " |
| 73 */ | |
| 74 OPFUNC(pseudo_include) | |
| 0 | 75 { |
| 76 int v1; | |
| 52 | 77 char *fn; |
| 0 | 78 |
| 52 | 79 // only include files on pass 1 |
| 80 // but make sure local include context is right | |
| 81 // for the next line... | |
| 0 | 82 if (as -> passnum != 1) |
| 52 | 83 { |
| 84 as -> context += 1; | |
| 0 | 85 return; |
| 52 | 86 } |
| 87 | |
| 88 while (**p && isspace(**p)) | |
| 89 (*p)++; | |
| 90 | |
| 91 if (!**p) | |
| 0 | 92 { |
| 52 | 93 register_error(as, l, 1, "Bad file name"); |
| 0 | 94 return; |
| 95 } | |
| 52 | 96 |
| 97 if (**p == '"') | |
| 98 { | |
| 99 // search for ending " | |
| 100 (*p)++; | |
| 101 for (v1 = 0; *((*p)+v1) && *((*p)+v1) != '"'; v1++) | |
| 102 /* do nothing */ ; | |
| 103 if (*((*p)+v1) != '"') | |
| 104 { | |
| 105 register_error(as, l, 1, "Bad file name"); | |
| 106 return; | |
| 107 } | |
| 108 } | |
| 109 else | |
| 0 | 110 { |
| 52 | 111 // search for a space type character |
| 112 for (v1 = 0; *((*p)+v1) && !isspace(*((*p)+v1)); v1++) | |
| 113 ; | |
| 0 | 114 } |
| 52 | 115 |
| 116 fn = lwasm_alloc(v1 + 1); | |
| 117 memcpy(fn, *p, v1); | |
| 118 fn[v1] = '\0'; | |
| 119 | |
| 120 // end local label context on include | |
| 121 as -> context += 1; | |
| 122 if (lwasm_read_file(as, fn) < 0) | |
| 123 { | |
| 124 register_error(as, l, 1, "File include error (%s)", fn); | |
| 125 } | |
| 126 lwasm_free(fn); | |
| 0 | 127 } |
| 128 | |
| 50 | 129 OPFUNC(pseudo_rmb) |
| 0 | 130 { |
| 50 | 131 int rval; |
| 132 lwasm_expr_stack_t *s; | |
| 0 | 133 |
| 50 | 134 s = lwasm_evaluate_expr(as, l, *p, NULL); |
| 135 if (!s) | |
| 0 | 136 { |
| 50 | 137 register_error(as, l, 1, "Bad expression"); |
| 0 | 138 return; |
| 139 } | |
| 50 | 140 if (!lwasm_expr_is_constant(s)) |
| 0 | 141 { |
| 50 | 142 register_error(as, l, 1, "Illegal incomplete reference (pass 1)"); |
| 143 lwasm_expr_stack_free(s); | |
| 0 | 144 return; |
| 145 } | |
| 50 | 146 rval = lwasm_expr_get_value(s); |
| 147 lwasm_expr_stack_free(s); | |
| 148 l -> nocodelen = rval; | |
| 149 as -> addr += rval; | |
| 0 | 150 } |
| 50 | 151 /* |
| 0 | 152 void pseudo_rmd(asmstate_t *as, sourceline_t *cl, char **optr) |
| 153 { | |
| 154 int rval, v1; | |
| 155 | |
| 156 rval = eval_expr(as, cl, optr, &v1); | |
| 157 if (rval < 0) | |
| 158 { | |
| 159 errorp1(ERR_FORWARD); | |
| 160 return; | |
| 161 } | |
| 162 if (v1 < 0) | |
| 163 { | |
| 164 errorp1(ERR_BADOPER); | |
| 165 return; | |
| 166 } | |
| 167 cl -> len = v1 * 2; | |
| 168 cl -> nocode = 1; | |
| 169 } | |
| 170 | |
| 171 void pseudo_rmq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 172 { | |
| 173 int rval, v1; | |
| 174 | |
| 175 rval = eval_expr(as, cl, optr, &v1); | |
| 176 if (rval < 0) | |
| 177 { | |
| 178 errorp1(ERR_FORWARD); | |
| 179 return; | |
| 180 } | |
| 181 if (v1 < 0) | |
| 182 { | |
| 183 errorp1(ERR_BADOPER); | |
| 184 return; | |
| 185 } | |
| 186 cl -> len = v1 * 4; | |
| 187 cl -> nocode = 1; | |
| 188 } | |
| 189 | |
| 190 void pseudo_zmb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 191 { | |
| 192 int rval, v1; | |
| 193 | |
| 194 rval = eval_expr(as, cl, optr, &v1); | |
| 195 if (rval < 0) | |
| 196 { | |
| 197 errorp1(ERR_FORWARD); | |
| 198 return; | |
| 199 } | |
| 200 if (v1 < 0) | |
| 201 { | |
| 202 errorp1(ERR_BADOPER); | |
| 203 return; | |
| 204 } | |
| 205 while (v1--) | |
| 206 emit(0); | |
| 207 } | |
| 208 | |
| 209 void pseudo_zmd(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 210 { | |
| 211 int rval, v1; | |
| 212 | |
| 213 rval = eval_expr(as, cl, optr, &v1); | |
| 214 if (rval < 0) | |
| 215 { | |
| 216 errorp1(ERR_FORWARD); | |
| 217 return; | |
| 218 } | |
| 219 if (v1 < 0) | |
| 220 { | |
| 221 errorp1(ERR_BADOPER); | |
| 222 return; | |
| 223 } | |
| 224 while (v1--) | |
| 225 { | |
| 226 emit(0); | |
| 227 emit(0); | |
| 228 } | |
| 229 } | |
| 230 | |
| 231 void pseudo_zmq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 232 { | |
| 233 int rval, v1; | |
| 234 | |
| 235 rval = eval_expr(as, cl, optr, &v1); | |
| 236 if (rval < 0) | |
| 237 { | |
| 238 errorp1(ERR_FORWARD); | |
| 239 return; | |
| 240 } | |
| 241 if (v1 < 0) | |
| 242 { | |
| 243 errorp1(ERR_BADOPER); | |
| 244 return; | |
| 245 } | |
| 246 while (v1--) | |
| 247 { | |
| 248 emit(0); | |
| 249 emit(0); | |
| 250 emit(0); | |
| 251 emit(0); | |
| 252 } | |
| 253 } | |
| 254 | |
| 255 void pseudo_end(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 256 { | |
| 257 int rval, v1; | |
| 258 | |
| 259 while (**optr && isspace(**optr)) | |
| 260 ; | |
| 261 if (**optr && **optr != '*' && **optr != ';') | |
| 262 { | |
| 263 rval = eval_expr(as, cl, optr, &v1); | |
| 264 if (rval < 0) | |
| 265 { | |
| 266 errorp1(ERR_FORWARD); | |
| 267 return; | |
| 268 } | |
| 269 } | |
| 270 else | |
| 271 { | |
| 272 v1 = 0; | |
| 273 } | |
| 274 if (as -> passnum == 2) | |
| 275 as -> execaddr = v1; | |
| 276 } | |
| 277 | |
| 278 void pseudo_align(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 279 { | |
| 280 int rval, v1; | |
| 281 int cn; | |
| 282 | |
| 283 rval = eval_expr(as, cl, optr, &v1); | |
| 284 if (rval < 0) | |
| 285 { | |
| 286 errorp1(ERR_FORWARD); | |
| 287 return; | |
| 288 } | |
| 289 cn = cl -> addr % v1; | |
| 290 if (cn) | |
| 291 cn = v1 - cn; | |
| 292 | |
| 293 while (cn) | |
| 294 { | |
| 295 emit(0); | |
| 296 cn--; | |
| 297 } | |
| 298 } | |
| 50 | 299 */ |
| 300 OPFUNC(pseudo_equ) | |
| 0 | 301 { |
| 50 | 302 lwasm_expr_stack_t *s; |
| 303 int rval; | |
| 52 | 304 |
| 305 // equ is not needed to be processed on pass 2 | |
| 306 if (as -> passnum != 1) | |
| 307 return; | |
| 308 | |
| 50 | 309 if (l -> sym == NULL) |
| 0 | 310 { |
| 50 | 311 register_error(as, l, 1, "No symbol specified"); |
| 0 | 312 return; |
| 313 } | |
| 50 | 314 |
| 315 s = lwasm_evaluate_expr(as, l, *p, NULL); | |
| 316 | |
| 317 if (!s) | |
| 0 | 318 { |
| 50 | 319 register_error(as, l, 1, "Bad expression"); |
| 320 rval = 0; | |
| 0 | 321 } |
| 50 | 322 else |
| 0 | 323 { |
| 50 | 324 if (!lwasm_expr_is_constant(s)) |
| 325 register_error(as, l, 1, "Invalid incomplete reference (pass 1)"); | |
| 326 rval = lwasm_expr_get_value(s); | |
| 327 lwasm_expr_stack_free(s); | |
| 0 | 328 } |
| 50 | 329 l -> symaddr = rval & 0xFFFF; |
| 330 l -> addrset = 2; | |
| 331 if (strchr(l -> sym, '@') || strchr(l -> sym, '?')) | |
| 332 lwasm_set_symbol(as, l -> sym, as -> context, l -> symaddr); | |
| 333 else | |
| 334 lwasm_set_symbol(as, l -> sym, -1, l -> symaddr); | |
| 0 | 335 } |
| 50 | 336 /* |
| 0 | 337 void pseudo_set(asmstate_t *as, sourceline_t *cl, char **optr) |
| 338 { | |
| 339 int rval, v1; | |
| 340 | |
| 341 if (cl -> hassym == 0) | |
| 342 { | |
| 343 errorp1(ERR_NOSYM); | |
| 344 return; | |
| 345 } | |
| 346 rval = eval_expr(as, cl, optr, &v1); | |
| 347 // eval_expr returns -1 if there was a forward ref | |
| 348 // or -2 if the expr was invalid | |
| 349 if (rval == -2) | |
| 350 { | |
| 351 // carp | |
| 352 errorp1(ERR_FORWARD); | |
| 353 } | |
| 354 if (rval < 0) | |
| 355 { | |
| 356 // remove symbol ref | |
| 357 cl -> hassym = 0; | |
| 358 // mark as a "comment" so it isn't processed next time | |
| 359 cl -> opcode = -1; | |
| 360 return; | |
| 361 } | |
| 362 cl -> code_symloc = v1; | |
| 363 cl -> isset = 1; | |
| 364 cl -> isequ = 1; | |
| 365 cl -> symaddr = v1 & 0xFFFF; | |
| 366 } | |
| 367 | |
| 368 void pseudo_setdp(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 369 { | |
| 370 int rval, v1; | |
| 371 | |
| 372 if (cl -> hassym) | |
| 373 { | |
| 374 register_error(as, cl, ERR_SYM); | |
| 375 cl -> hassym = 0; | |
| 376 return; | |
| 377 } | |
| 378 else | |
| 379 { | |
| 380 rval = eval_expr(as, cl, optr, &v1); | |
| 381 if (rval == -1) | |
| 382 { | |
| 383 errorp1(ERR_FORWARD); | |
| 384 } | |
| 385 if (rval < 0) | |
| 386 { | |
| 387 cl -> opcode = -1; | |
| 388 return; | |
| 389 } | |
| 390 } | |
| 391 // setdp needs to resolve properly on pass 2 | |
| 392 if (v1 > 0xff || v1 < 0) | |
| 393 { | |
| 394 errorp1(ERR_OVERFLOW); | |
| 395 } | |
| 396 as -> dpval = v1 & 0xff; | |
| 397 cl -> dpval = v1 & 0xff; | |
| 398 cl -> issetdp = 1; | |
| 399 cl -> numcodebytes = 0; | |
| 400 //printf("%s\n", "SETDP2"); | |
| 401 } | |
| 402 | |
| 403 void pseudo_fcc(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 404 { | |
| 405 int cn = 0; | |
| 406 int delim = 0; | |
| 407 | |
| 408 delim = *(*optr)++; | |
| 409 if (!delim) | |
| 410 { | |
| 411 errorp1(ERR_BADOPER); | |
| 412 } | |
| 413 else | |
| 414 { | |
| 415 while (**optr && **optr != delim) | |
| 416 { | |
| 417 emit(**optr); | |
| 418 (*optr)++; | |
| 419 cn += 1; | |
| 420 } | |
| 421 } | |
| 422 cl -> len = cn; | |
| 423 } | |
| 424 | |
| 425 void pseudo_fcs(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 426 { | |
| 427 int cn = 0; | |
| 428 int delim = 0; | |
| 429 | |
| 430 delim = *(*optr)++; | |
| 431 if (!delim) | |
| 432 { | |
| 433 errorp1(ERR_BADOPER); | |
| 434 } | |
| 435 else | |
| 436 { | |
| 437 while (**optr && **optr != delim) | |
| 438 { | |
| 439 if (!*((*optr) + 1) || *((*optr) + 1) == delim) | |
| 440 emit((**optr) | 0x80); | |
| 441 else | |
| 442 emit(**optr); | |
| 443 (*optr)++; | |
| 444 cn += 1; | |
| 445 } | |
| 446 } | |
| 447 cl -> len = cn; | |
| 448 } | |
| 449 | |
| 450 void pseudo_fcn(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 451 { | |
| 452 int cn = 0; | |
| 453 int delim = 0; | |
| 454 | |
| 455 delim = *(*optr)++; | |
| 456 if (!delim) | |
| 457 { | |
| 458 errorp1(ERR_BADOPER); | |
| 459 } | |
| 460 else | |
| 461 { | |
| 462 while (**optr && **optr != delim) | |
| 463 { | |
| 464 emit(**optr); | |
| 465 (*optr)++; | |
| 466 cn += 1; | |
| 467 } | |
| 468 } | |
| 469 emit(0); | |
| 470 cl -> len = cn + 1; | |
| 471 } | |
| 472 | |
| 473 void pseudo_fcb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 474 { | |
| 475 int rval, v1; | |
| 476 | |
| 477 fcb_again: | |
| 478 rval = eval_expr(as, cl, optr, &v1); | |
| 479 if (v1 < -127 || v1 > 0xff) | |
| 480 errorp2(ERR_OVERFLOW); | |
| 481 emit(v1 & 0xff); | |
| 482 if (**optr == ',') | |
| 483 { | |
| 484 (*optr)++; | |
| 485 goto fcb_again; | |
| 486 } | |
| 487 } | |
| 488 | |
| 489 void pseudo_fdb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 490 { | |
| 491 int rval, v1; | |
| 492 | |
| 493 fdb_again: | |
| 494 rval = eval_expr(as, cl, optr, &v1); | |
| 495 emit((v1 >> 8) & 0xff); | |
| 496 emit(v1 & 0xff); | |
| 497 if (**optr == ',') | |
| 498 { | |
| 499 (*optr)++; | |
| 500 goto fdb_again; | |
| 501 } | |
| 502 } | |
| 503 | |
| 504 void pseudo_fqb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 505 { | |
| 506 int rval, v1; | |
| 507 | |
| 508 fqb_again: | |
| 509 rval = eval_expr(as, cl, optr, &v1); | |
| 510 emit((v1 >> 24) & 0xff); | |
| 511 emit((v1 >> 16) & 0xff); | |
| 512 emit((v1 >> 8) & 0xff); | |
| 513 emit(v1 & 0xff); | |
| 514 if (**optr == ',') | |
| 515 { | |
| 516 (*optr)++; | |
| 517 goto fqb_again; | |
| 518 } | |
| 519 } | |
| 520 | |
| 521 // don't need to do anything if we are executing one of these | |
| 522 void pseudo_endc(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 523 { | |
| 524 return; | |
| 525 } | |
| 526 | |
| 527 // if "else" executes, we must be going into an "ignore" state | |
| 528 void pseudo_else(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 529 { | |
| 530 as -> skipcond = 1; | |
| 531 as -> skipcount = 1; | |
| 532 } | |
| 533 | |
| 534 void pseudo_ifne(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 535 { | |
| 536 int v1; | |
| 537 int rval; | |
| 538 // printf("ifne %s\n", *optr); | |
| 539 rval = eval_expr(as, cl, optr, &v1); | |
| 540 if (rval < 0) | |
| 541 { | |
| 542 errorp1(ERR_BADCOND); | |
| 543 } | |
| 544 else | |
| 545 { | |
| 546 // printf("Condition value: %d\n", v1); | |
| 547 if (!v1) | |
| 548 { | |
| 549 // printf("condition no match\n"); | |
| 550 as -> skipcond = 1; | |
| 551 as -> skipcount = 1; | |
| 552 } | |
| 553 } | |
| 554 } | |
| 555 void pseudo_ifeq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 556 { | |
| 557 int v1; | |
| 558 int rval; | |
| 559 | |
| 560 rval = eval_expr(as, cl, optr, &v1); | |
| 561 if (rval < 0) | |
| 562 { | |
| 563 errorp1(ERR_BADCOND); | |
| 564 } | |
| 565 else | |
| 566 { | |
| 567 if (v1) | |
| 568 { | |
| 569 as -> skipcond = 1; | |
| 570 as -> skipcount = 1; | |
| 571 } | |
| 572 } | |
| 573 } | |
| 574 void pseudo_iflt(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 575 { | |
| 576 int v1; | |
| 577 int rval; | |
| 578 | |
| 579 rval = eval_expr(as, cl, optr, &v1); | |
| 580 if (rval < 0) | |
| 581 { | |
| 582 errorp1(ERR_BADCOND); | |
| 583 } | |
| 584 else | |
| 585 { | |
| 586 if (v1 >= 0) | |
| 587 { | |
| 588 as -> skipcond = 1; | |
| 589 as -> skipcount = 1; | |
| 590 } | |
| 591 } | |
| 592 } | |
| 593 void pseudo_ifle(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 594 { | |
| 595 int v1; | |
| 596 int rval; | |
| 597 | |
| 598 rval = eval_expr(as, cl, optr, &v1); | |
| 599 if (rval < 0) | |
| 600 { | |
| 601 errorp1(ERR_BADCOND); | |
| 602 } | |
| 603 else | |
| 604 { | |
| 605 if (v1 > 0) | |
| 606 { | |
| 607 as -> skipcond = 1; | |
| 608 as -> skipcount = 1; | |
| 609 } | |
| 610 } | |
| 611 } | |
| 612 void pseudo_ifgt(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 613 { | |
| 614 int v1; | |
| 615 int rval; | |
| 616 | |
| 617 rval = eval_expr(as, cl, optr, &v1); | |
| 618 if (rval < 0) | |
| 619 { | |
| 620 errorp1(ERR_BADCOND); | |
| 621 } | |
| 622 else | |
| 623 { | |
| 624 if (v1 <= 0) | |
| 625 { | |
| 626 as -> skipcond = 1; | |
| 627 as -> skipcount = 1; | |
| 628 } | |
| 629 } | |
| 630 } | |
| 631 void pseudo_ifge(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 632 { | |
| 633 int v1; | |
| 634 int rval; | |
| 635 | |
| 636 rval = eval_expr(as, cl, optr, &v1); | |
| 637 if (rval < 0) | |
| 638 { | |
| 639 errorp1(ERR_BADCOND); | |
| 640 } | |
| 641 else | |
| 642 { | |
| 643 if (v1 < 0) | |
| 644 { | |
| 645 as -> skipcond = 1; | |
| 646 as -> skipcount = 1; | |
| 647 } | |
| 648 } | |
| 649 } | |
| 650 | |
| 651 void pseudo_error(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 652 { | |
| 653 cl -> user_error = strdup(*optr); | |
| 654 errorp1(ERR_USER); | |
| 655 } | |
|
47
804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
lost
parents:
4
diff
changeset
|
656 */ |