1 %{ 2 /* $NetBSD: aicasm_scan.l,v 1.6 2020/06/27 16:19:38 jdolecek Exp $ */ 3 /* 4 * Lexical Analyzer for the Aic7xxx SCSI Host adapter sequencer assembler. 5 * 6 * Copyright (c) 1997, 1998, 2000 Justin T. Gibbs. 7 * Copyright (c) 2001, 2002 Adaptec Inc. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions, and the following disclaimer, 15 * without modification. 16 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 17 * substantially similar to the "NO WARRANTY" disclaimer below 18 * ("Disclaimer") and any redistribution must be conditioned upon 19 * including a substantially similar Disclaimer requirement for further 20 * binary redistribution. 21 * 3. Neither the names of the above-listed copyright holders nor the names 22 * of any contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * Alternatively, this software may be distributed under the terms of the 26 * GNU General Public License ("GPL") version 2 as published by the Free 27 * Software Foundation. 28 * 29 * NO WARRANTY 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 33 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 34 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 38 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 39 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 40 * POSSIBILITY OF SUCH DAMAGES. 41 * 42 * $FreeBSD: src/sys/dev/aic7xxx/aicasm/aicasm_scan.l,v 1.21 2002/09/27 03:23:02 gibbs Exp $ 43 */ 44 45 #include <sys/types.h> 46 47 #include <inttypes.h> 48 #include <limits.h> 49 #include <regex.h> 50 #include <stdio.h> 51 #include <string.h> 52 #include <sysexits.h> 53 #ifdef __linux__ 54 #include "../queue.h" 55 #else 56 #include <sys/queue.h> 57 #endif 58 59 #include "aicasm.h" 60 #include "aicasm_symbol.h" 61 #include "aicasm_gram.h" 62 63 int yyparse(void); 64 void yy_delete_buffer(YY_BUFFER_STATE); 65 int mmlex(void); 66 int mmparse(void); 67 void mm_delete_buffer(YY_BUFFER_STATE); 68 void mm_switch_to_buffer(YY_BUFFER_STATE); 69 70 /* This is used for macro body capture too, so err on the large size. */ 71 #define MAX_STR_CONST 4096 72 static char string_buf[MAX_STR_CONST]; 73 static char *string_buf_ptr; 74 static int parren_count; 75 static int quote_count; 76 static char buf[255]; 77 %} 78 79 PATH ([/]*[-A-Za-z0-9_.])+ 80 WORD [A-Za-z_][-A-Za-z_0-9]* 81 SPACE [ \t]+ 82 MCARG [^(), \t]+ 83 MBODY ((\\[^\n])*[^\n\\]*)+ 84 85 %x COMMENT 86 %x CEXPR 87 %x INCLUDE 88 %x STRING 89 %x MACRODEF 90 %x MACROARGLIST 91 %x MACROCALLARGS 92 %x MACROBODY 93 94 %% 95 \n { ++yylineno; } 96 "/*" { BEGIN COMMENT; /* Enter comment eating state */ } 97 <COMMENT>"/*" { fprintf(stderr, "Warning! Comment within comment."); } 98 <COMMENT>\n { ++yylineno; } 99 <COMMENT>[^*/\n]* ; 100 <COMMENT>"*"+[^*/\n]* ; 101 <COMMENT>"/"+[^*/\n]* ; 102 <COMMENT>"*"+"/" { BEGIN INITIAL; } 103 if[ \t]*\( { 104 string_buf_ptr = string_buf; 105 parren_count = 1; 106 BEGIN CEXPR; 107 return T_IF; 108 } 109 <CEXPR>\( { *string_buf_ptr++ = '('; parren_count++; } 110 <CEXPR>\) { 111 parren_count--; 112 if (parren_count == 0) { 113 /* All done */ 114 BEGIN INITIAL; 115 *string_buf_ptr = '\0'; 116 yylval.sym = symtable_get(string_buf); 117 return T_CEXPR; 118 } else { 119 *string_buf_ptr++ = ')'; 120 } 121 } 122 <CEXPR>\n { ++yylineno; } 123 <CEXPR>[^()\n]+ { 124 char *yptr; 125 126 yptr = yytext; 127 while (*yptr != '\0') { 128 /* Remove duplicate spaces */ 129 if (*yptr == '\t') 130 *yptr = ' '; 131 if (*yptr == ' ' 132 && string_buf_ptr != string_buf 133 && string_buf_ptr[-1] == ' ') 134 yptr++; 135 else 136 *string_buf_ptr++ = *yptr++; 137 } 138 } 139 140 VERSION { return T_VERSION; } 141 PREFIX { return T_PREFIX; } 142 PATCH_ARG_LIST { return T_PATCH_ARG_LIST; } 143 \" { 144 string_buf_ptr = string_buf; 145 BEGIN STRING; 146 } 147 <STRING>[^"]+ { 148 char *yptr; 149 150 yptr = yytext; 151 while (*yptr) 152 *string_buf_ptr++ = *yptr++; 153 } 154 <STRING>\" { 155 /* All done */ 156 BEGIN INITIAL; 157 *string_buf_ptr = '\0'; 158 yylval.str = string_buf; 159 return T_STRING; 160 } 161 {SPACE} ; 162 163 /* Register/SCB/SRAM definition keywords */ 164 export { return T_EXPORT; } 165 register { return T_REGISTER; } 166 const { yylval.value = FALSE; return T_CONST; } 167 download { return T_DOWNLOAD; } 168 address { return T_ADDRESS; } 169 access_mode { return T_ACCESS_MODE; } 170 modes { return T_MODES; } 171 RW|RO|WO { 172 if (strcmp(yytext, "RW") == 0) 173 yylval.value = RW; 174 else if (strcmp(yytext, "RO") == 0) 175 yylval.value = RO; 176 else 177 yylval.value = WO; 178 return T_MODE; 179 } 180 BEGIN_CRITICAL { return T_BEGIN_CS; } 181 END_CRITICAL { return T_END_CS; } 182 SET_SRC_MODE { return T_SET_SRC_MODE; } 183 SET_DST_MODE { return T_SET_DST_MODE; } 184 field { return T_FIELD; } 185 enum { return T_ENUM; } 186 mask { return T_MASK; } 187 alias { return T_ALIAS; } 188 size { return T_SIZE; } 189 scb { return T_SCB; } 190 scratch_ram { return T_SRAM; } 191 accumulator { return T_ACCUM; } 192 mode_pointer { return T_MODE_PTR; } 193 allones { return T_ALLONES; } 194 allzeros { return T_ALLZEROS; } 195 none { return T_NONE; } 196 sindex { return T_SINDEX; } 197 A { return T_A; } 198 199 /* Opcodes */ 200 shl { return T_SHL; } 201 shr { return T_SHR; } 202 ror { return T_ROR; } 203 rol { return T_ROL; } 204 mvi { return T_MVI; } 205 mov { return T_MOV; } 206 clr { return T_CLR; } 207 jmp { return T_JMP; } 208 jc { return T_JC; } 209 jnc { return T_JNC; } 210 je { return T_JE; } 211 jne { return T_JNE; } 212 jz { return T_JZ; } 213 jnz { return T_JNZ; } 214 call { return T_CALL; } 215 add { return T_ADD; } 216 adc { return T_ADC; } 217 bmov { return T_BMOV; } 218 inc { return T_INC; } 219 dec { return T_DEC; } 220 stc { return T_STC; } 221 clc { return T_CLC; } 222 cmp { return T_CMP; } 223 not { return T_NOT; } 224 xor { return T_XOR; } 225 test { return T_TEST;} 226 and { return T_AND; } 227 or { return T_OR; } 228 ret { return T_RET; } 229 nop { return T_NOP; } 230 else { return T_ELSE; } 231 232 /* Allowed Symbols */ 233 \<\< { return T_EXPR_LSHIFT; } 234 \>\> { return T_EXPR_RSHIFT; } 235 [-+,:()~|&."{};<>[\]/*!=] { return yytext[0]; } 236 237 /* Number processing */ 238 0[0-7]* { 239 yylval.value = strtol(yytext, NULL, 8); 240 return T_NUMBER; 241 } 242 243 0[xX][0-9a-fA-F]+ { 244 yylval.value = strtoul(yytext + 2, NULL, 16); 245 return T_NUMBER; 246 } 247 248 [1-9][0-9]* { 249 yylval.value = strtol(yytext, NULL, 10); 250 return T_NUMBER; 251 } 252 /* Include Files */ 253 #include{SPACE} { 254 BEGIN INCLUDE; 255 quote_count = 0; 256 return T_INCLUDE; 257 } 258 <INCLUDE>[<] { return yytext[0]; } 259 <INCLUDE>[>] { BEGIN INITIAL; return yytext[0]; } 260 <INCLUDE>[\"] { 261 if (quote_count != 0) 262 BEGIN INITIAL; 263 quote_count++; 264 return yytext[0]; 265 } 266 <INCLUDE>{PATH} { 267 char *yptr; 268 269 yptr = yytext; 270 string_buf_ptr = string_buf; 271 while (*yptr) 272 *string_buf_ptr++ = *yptr++; 273 yylval.str = string_buf; 274 *string_buf_ptr = '\0'; 275 return T_PATH; 276 } 277 <INCLUDE>. { stop("Invalid include line", EX_DATAERR); } 278 #define{SPACE} { 279 BEGIN MACRODEF; 280 return T_DEFINE; 281 } 282 <MACRODEF>{WORD}{SPACE} { 283 char *yptr; 284 285 /* Strip space and return as a normal symbol */ 286 yptr = yytext; 287 while (*yptr != ' ' && *yptr != '\t') 288 yptr++; 289 *yptr = '\0'; 290 yylval.sym = symtable_get(yytext); 291 string_buf_ptr = string_buf; 292 BEGIN MACROBODY; 293 return T_SYMBOL; 294 } 295 <MACRODEF>{WORD}\( { 296 /* 297 * We store the symbol with its opening 298 * parren so we can differentiate macros 299 * that take args from macros with the 300 * same name that do not take args as 301 * is allowed in C. 302 */ 303 BEGIN MACROARGLIST; 304 yylval.sym = symtable_get(yytext); 305 unput('('); 306 return T_SYMBOL; 307 } 308 <MACROARGLIST>{WORD} { 309 yylval.str = yytext; 310 return T_ARG; 311 } 312 <MACROARGLIST>{SPACE} ; 313 <MACROARGLIST>[(,] { 314 return yytext[0]; 315 } 316 <MACROARGLIST>[)] { 317 string_buf_ptr = string_buf; 318 BEGIN MACROBODY; 319 return ')'; 320 } 321 <MACROARGLIST>. { 322 snprintf(buf, sizeof(buf), "Invalid character " 323 "'%c' in macro argument list", 324 yytext[0]); 325 stop(buf, EX_DATAERR); 326 } 327 <MACROCALLARGS>{SPACE} ; 328 <MACROCALLARGS>\( { 329 parren_count++; 330 if (parren_count == 1) 331 return ('('); 332 *string_buf_ptr++ = '('; 333 } 334 <MACROCALLARGS>\) { 335 parren_count--; 336 if (parren_count == 0) { 337 BEGIN INITIAL; 338 return (')'); 339 } 340 *string_buf_ptr++ = ')'; 341 } 342 <MACROCALLARGS>{MCARG} { 343 char *yptr; 344 345 yptr = yytext; 346 while (*yptr) 347 *string_buf_ptr++ = *yptr++; 348 } 349 <MACROCALLARGS>\, { 350 if (string_buf_ptr != string_buf) { 351 /* 352 * Return an argument and 353 * rescan this comma so we 354 * can return it as well. 355 */ 356 *string_buf_ptr = '\0'; 357 yylval.str = string_buf; 358 string_buf_ptr = string_buf; 359 unput(','); 360 return T_ARG; 361 } 362 return ','; 363 } 364 <MACROBODY>\\\n { 365 /* Eat escaped newlines. */ 366 ++yylineno; 367 } 368 <MACROBODY>\n { 369 /* Macros end on the first unescaped newline. */ 370 BEGIN INITIAL; 371 *string_buf_ptr = '\0'; 372 yylval.str = string_buf; 373 ++yylineno; 374 return T_MACROBODY; 375 } 376 <MACROBODY>{MBODY} { 377 char *yptr; 378 379 yptr = yytext; 380 while (*yptr) 381 *string_buf_ptr++ = *yptr++; 382 } 383 {WORD}\( { 384 char *yptr; 385 char *ycopy; 386 387 /* May be a symbol or a macro invocation. */ 388 yylval.sym = symtable_get(yytext); 389 if (yylval.sym->type == MACRO) { 390 YY_BUFFER_STATE old_state; 391 YY_BUFFER_STATE temp_state; 392 393 ycopy = strdup(yytext); 394 yptr = ycopy + yyleng; 395 while (yptr > ycopy) 396 unput(*--yptr); 397 old_state = YY_CURRENT_BUFFER; 398 temp_state = 399 yy_create_buffer(stdin, 400 YY_BUF_SIZE); 401 yy_switch_to_buffer(temp_state); 402 mm_switch_to_buffer(old_state); 403 mmparse(); 404 mm_switch_to_buffer(temp_state); 405 yy_switch_to_buffer(old_state); 406 mm_delete_buffer(temp_state); 407 expand_macro(yylval.sym); 408 } else { 409 if (yylval.sym->type == UNINITIALIZED) { 410 /* Try without the '(' */ 411 symbol_delete(yylval.sym); 412 yytext[yyleng-1] = '\0'; 413 yylval.sym = 414 symtable_get(yytext); 415 } 416 unput('('); 417 return T_SYMBOL; 418 } 419 } 420 {WORD} { 421 yylval.sym = symtable_get(yytext); 422 if (yylval.sym->type == MACRO) { 423 expand_macro(yylval.sym); 424 } else { 425 return T_SYMBOL; 426 } 427 } 428 . { 429 snprintf(buf, sizeof(buf), "Invalid character " 430 "'%c'", yytext[0]); 431 stop(buf, EX_DATAERR); 432 } 433 %% 434 435 typedef struct include { 436 YY_BUFFER_STATE buffer; 437 int lineno; 438 char *filename; 439 SLIST_ENTRY(include) links; 440 }include_t; 441 442 SLIST_HEAD(, include) include_stack; 443 444 void 445 include_file(char *file_name, include_type type) 446 { 447 FILE *newfile; 448 include_t *include; 449 450 newfile = NULL; 451 /* Try the current directory first */ 452 if (includes_search_curdir != 0 || type == SOURCE_FILE) 453 newfile = fopen(file_name, "r"); 454 455 if (newfile == NULL && type != SOURCE_FILE) { 456 path_entry_t include_dir; 457 for (include_dir = search_path.slh_first; 458 include_dir != NULL; 459 include_dir = include_dir->links.sle_next) { 460 char fullname[PATH_MAX]; 461 462 if ((include_dir->quoted_includes_only == TRUE) 463 && (type != QUOTED_INCLUDE)) 464 continue; 465 466 snprintf(fullname, sizeof(fullname), 467 "%s/%s", include_dir->directory, file_name); 468 469 if ((newfile = fopen(fullname, "r")) != NULL) 470 break; 471 } 472 } 473 474 if (newfile == NULL) { 475 perror(file_name); 476 stop("Unable to open input file", EX_SOFTWARE); 477 /* NOTREACHED */ 478 } 479 480 if (type != SOURCE_FILE) { 481 include = (include_t *)malloc(sizeof(include_t)); 482 if (include == NULL) { 483 stop("Unable to allocate include stack entry", 484 EX_SOFTWARE); 485 /* NOTREACHED */ 486 } 487 include->buffer = YY_CURRENT_BUFFER; 488 include->lineno = yylineno; 489 include->filename = yyfilename; 490 SLIST_INSERT_HEAD(&include_stack, include, links); 491 } 492 yy_switch_to_buffer(yy_create_buffer(newfile, YY_BUF_SIZE)); 493 yylineno = 1; 494 yyfilename = strdup(file_name); 495 } 496 497 static void next_substitution(struct symbol *mac_symbol, const char *body_pos, 498 const char **next_match, 499 struct macro_arg **match_marg, regmatch_t *match); 500 501 void 502 expand_macro(struct symbol *macro_symbol) 503 { 504 struct macro_arg *marg; 505 struct macro_arg *match_marg; 506 const char *body_head; 507 const char *body_pos; 508 const char *next_match; 509 510 /* 511 * Due to the nature of unput, we must work 512 * backwards through the macro body performing 513 * any expansions. 514 */ 515 body_head = macro_symbol->info.macroinfo->body; 516 body_pos = body_head + strlen(body_head); 517 while (body_pos > body_head) { 518 regmatch_t match; 519 520 next_match = body_head; 521 match_marg = NULL; 522 next_substitution(macro_symbol, body_pos, &next_match, 523 &match_marg, &match); 524 525 /* Put back everything up until the replacement. */ 526 while (body_pos > next_match) 527 unput(*--body_pos); 528 529 /* Perform the replacement. */ 530 if (match_marg != NULL) { 531 const char *strp; 532 533 next_match = match_marg->replacement_text; 534 strp = next_match + strlen(next_match); 535 while (strp > next_match) 536 unput(*--strp); 537 538 /* Skip past the unexpanded macro arg. */ 539 body_pos -= match.rm_eo - match.rm_so; 540 } 541 } 542 543 /* Cleanup replacement text. */ 544 STAILQ_FOREACH(marg, ¯o_symbol->info.macroinfo->args, links) { 545 free(marg->replacement_text); 546 } 547 } 548 549 /* 550 * Find the next substitution in the macro working backwards from 551 * body_pos until the beginning of the macro buffer. next_match 552 * should be initialized to the beginning of the macro buffer prior 553 * to calling this routine. 554 */ 555 static void 556 next_substitution(struct symbol *mac_symbol, const char *body_pos, 557 const char **next_match, struct macro_arg **match_marg, 558 regmatch_t *match) 559 { 560 regmatch_t matches[2]; 561 struct macro_arg *marg; 562 const char *search_pos; 563 int retval; 564 565 do { 566 search_pos = *next_match; 567 568 STAILQ_FOREACH(marg, &mac_symbol->info.macroinfo->args, links) { 569 570 retval = regexec(&marg->arg_regex, search_pos, 2, 571 matches, 0); 572 if (retval == 0 573 && (matches[1].rm_eo + search_pos) <= body_pos 574 && (matches[1].rm_eo + search_pos) > *next_match) { 575 *match = matches[1]; 576 *next_match = match->rm_eo + search_pos; 577 *match_marg = marg; 578 } 579 } 580 } while (search_pos != *next_match); 581 } 582 583 int 584 yywrap() 585 { 586 include_t *include; 587 588 yy_delete_buffer(YY_CURRENT_BUFFER); 589 (void)fclose(yyin); 590 if (yyfilename != NULL) 591 free(yyfilename); 592 yyfilename = NULL; 593 include = include_stack.slh_first; 594 if (include != NULL) { 595 yy_switch_to_buffer(include->buffer); 596 yylineno = include->lineno; 597 yyfilename = include->filename; 598 SLIST_REMOVE_HEAD(&include_stack, links); 599 free(include); 600 return (0); 601 } 602 return (1); 603 } 604
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