1%{ 2/* 3 * Lexical Analyzer for the Aic7xxx SCSI Host adapter sequencer assembler. 4 * 5 * Copyright (c) 1997, 1998, 2000 Justin T. Gibbs. 6 * Copyright (c) 2001, 2002 Adaptec Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions, and the following disclaimer, 14 * without modification. 15 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 16 * substantially similar to the "NO WARRANTY" disclaimer below 17 * ("Disclaimer") and any redistribution must be conditioned upon 18 * including a substantially similar Disclaimer requirement for further 19 * binary redistribution. 20 * 3. Neither the names of the above-listed copyright holders nor the names 21 * of any contributors may be used to endorse or promote products derived 22 * from this software without specific prior written permission. 23 * 24 * Alternatively, this software may be distributed under the terms of the 25 * GNU General Public License ("GPL") version 2 as published by the Free 26 * Software Foundation. 27 * 28 * NO WARRANTY 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 38 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGES. 40 * 41 * $Id: aicasm_scan.l,v 1.1.1.1 2007-08-03 18:52:58 rnuti Exp $ 42 * 43 * $FreeBSD$ 44 */ 45 46#include <sys/types.h> 47 48#include <inttypes.h> 49#include <limits.h> 50#include <regex.h> 51#include <stdio.h> 52#include <string.h> 53#include <sysexits.h> 54#ifdef __linux__ 55#include "../queue.h" 56#else 57#include <sys/queue.h> 58#endif 59 60#include "aicasm.h" 61#include "aicasm_symbol.h" 62#include "aicasm_gram.h" 63 64/* This is used for macro body capture too, so err on the large size. */ 65#define MAX_STR_CONST 4096 66static char string_buf[MAX_STR_CONST]; 67static char *string_buf_ptr; 68static int parren_count; 69static int quote_count; 70static char buf[255]; 71%} 72 73PATH ([/]*[-A-Za-z0-9_.])+ 74WORD [A-Za-z_][-A-Za-z_0-9]* 75SPACE [ \t]+ 76MCARG [^(), \t]+ 77MBODY ((\\[^\n])*[^\n\\]*)+ 78 79%x COMMENT 80%x CEXPR 81%x INCLUDE 82%x STRING 83%x MACRODEF 84%x MACROARGLIST 85%x MACROCALLARGS 86%x MACROBODY 87 88%% 89\n { ++yylineno; } 90\r ; 91"/*" { BEGIN COMMENT; /* Enter comment eating state */ } 92<COMMENT>"/*" { fprintf(stderr, "Warning! Comment within comment."); } 93<COMMENT>\n { ++yylineno; } 94<COMMENT>[^*/\n]* ; 95<COMMENT>"*"+[^*/\n]* ; 96<COMMENT>"/"+[^*/\n]* ; 97<COMMENT>"*"+"/" { BEGIN INITIAL; } 98if[ \t]*\( { 99 string_buf_ptr = string_buf; 100 parren_count = 1; 101 BEGIN CEXPR; 102 return T_IF; 103 } 104<CEXPR>\( { *string_buf_ptr++ = '('; parren_count++; } 105<CEXPR>\) { 106 parren_count--; 107 if (parren_count == 0) { 108 /* All done */ 109 BEGIN INITIAL; 110 *string_buf_ptr = '\0'; 111 yylval.sym = symtable_get(string_buf); 112 return T_CEXPR; 113 } else { 114 *string_buf_ptr++ = ')'; 115 } 116 } 117<CEXPR>\n { ++yylineno; } 118<CEXPR>\r ; 119<CEXPR>[^()\n]+ { 120 char *yptr; 121 122 yptr = yytext; 123 while (*yptr != '\0') { 124 /* Remove duplicate spaces */ 125 if (*yptr == '\t') 126 *yptr = ' '; 127 if (*yptr == ' ' 128 && string_buf_ptr != string_buf 129 && string_buf_ptr[-1] == ' ') 130 yptr++; 131 else 132 *string_buf_ptr++ = *yptr++; 133 } 134 } 135else { return T_ELSE; } 136VERSION { return T_VERSION; } 137PREFIX { return T_PREFIX; } 138PATCH_ARG_LIST { return T_PATCH_ARG_LIST; } 139\" { 140 string_buf_ptr = string_buf; 141 BEGIN STRING; 142 } 143<STRING>[^"]+ { 144 char *yptr; 145 146 yptr = yytext; 147 while (*yptr) 148 *string_buf_ptr++ = *yptr++; 149 } 150<STRING>\" { 151 /* All done */ 152 BEGIN INITIAL; 153 *string_buf_ptr = '\0'; 154 yylval.str = string_buf; 155 return T_STRING; 156 } 157{SPACE} ; 158 159 /* Register/SCB/SRAM definition keywords */ 160export { return T_EXPORT; } 161register { return T_REGISTER; } 162const { yylval.value = FALSE; return T_CONST; } 163download { return T_DOWNLOAD; } 164address { return T_ADDRESS; } 165access_mode { return T_ACCESS_MODE; } 166modes { return T_MODES; } 167RW|RO|WO { 168 if (strcmp(yytext, "RW") == 0) 169 yylval.value = RW; 170 else if (strcmp(yytext, "RO") == 0) 171 yylval.value = RO; 172 else 173 yylval.value = WO; 174 return T_MODE; 175 } 176field { return T_FIELD; } 177enum { return T_ENUM; } 178mask { return T_MASK; } 179alias { return T_ALIAS; } 180size { return T_SIZE; } 181scb { return T_SCB; } 182scratch_ram { return T_SRAM; } 183accumulator { return T_ACCUM; } 184mode_pointer { return T_MODE_PTR; } 185allones { return T_ALLONES; } 186allzeros { return T_ALLZEROS; } 187none { return T_NONE; } 188sindex { return T_SINDEX; } 189A { return T_A; } 190 191 /* Instruction Formatting */ 192PAD_PAGE { return T_PAD_PAGE; } 193BEGIN_CRITICAL { return T_BEGIN_CS; } 194END_CRITICAL { return T_END_CS; } 195SET_SRC_MODE { return T_SET_SRC_MODE; } 196SET_DST_MODE { return T_SET_DST_MODE; } 197 198 /* Opcodes */ 199shl { return T_SHL; } 200shr { return T_SHR; } 201ror { return T_ROR; } 202rol { return T_ROL; } 203mvi { return T_MVI; } 204mov { return T_MOV; } 205clr { return T_CLR; } 206jmp { return T_JMP; } 207jc { return T_JC; } 208jnc { return T_JNC; } 209je { return T_JE; } 210jne { return T_JNE; } 211jz { return T_JZ; } 212jnz { return T_JNZ; } 213call { return T_CALL; } 214add { return T_ADD; } 215adc { return T_ADC; } 216bmov { return T_BMOV; } 217inc { return T_INC; } 218dec { return T_DEC; } 219stc { return T_STC; } 220clc { return T_CLC; } 221cmp { return T_CMP; } 222not { return T_NOT; } 223xor { return T_XOR; } 224test { return T_TEST;} 225and { return T_AND; } 226or { return T_OR; } 227ret { return T_RET; } 228nop { return T_NOP; } 229 230 /* ARP2 16bit extensions */ 231or16 { return T_OR16; } 232and16 { return T_AND16; } 233xor16 { return T_XOR16; } 234add16 { return T_ADD16; } 235adc16 { return T_ADC16; } 236mvi16 { return T_MVI16; } 237test16 { return T_TEST16; } 238cmp16 { return T_CMP16; } 239cmpxchg { return T_CMPXCHG; } 240 241 /* Allowed Symbols */ 242\<\< { return T_EXPR_LSHIFT; } 243\>\> { return T_EXPR_RSHIFT; } 244[-+,:()~|&."{};<>[\]/*!=] { return yytext[0]; } 245 246 /* Number processing */ 2470[0-7]* { 248 yylval.value = strtol(yytext, NULL, 8); 249 return T_NUMBER; 250 } 251 2520[xX][0-9a-fA-F]+ { 253 yylval.value = strtoul(yytext + 2, NULL, 16); 254 return T_NUMBER; 255 } 256 257[1-9][0-9]* { 258 yylval.value = strtol(yytext, NULL, 10); 259 return T_NUMBER; 260 } 261 /* Include Files */ 262#include{SPACE} { 263 BEGIN INCLUDE; 264 quote_count = 0; 265 return T_INCLUDE; 266 } 267<INCLUDE>[<] { return yytext[0]; } 268<INCLUDE>[>] { BEGIN INITIAL; return yytext[0]; } 269<INCLUDE>[\"] { 270 if (quote_count != 0) 271 BEGIN INITIAL; 272 quote_count++; 273 return yytext[0]; 274 } 275<INCLUDE>{PATH} { 276 char *yptr; 277 278 yptr = yytext; 279 string_buf_ptr = string_buf; 280 while (*yptr) 281 *string_buf_ptr++ = *yptr++; 282 yylval.str = string_buf; 283 *string_buf_ptr = '\0'; 284 return T_PATH; 285 } 286<INCLUDE>. { stop("Invalid include line", EX_DATAERR); } 287#define{SPACE} { 288 BEGIN MACRODEF; 289 return T_DEFINE; 290 } 291<MACRODEF>{WORD}{SPACE} { 292 char *yptr; 293 294 /* Strip space and return as a normal symbol */ 295 yptr = yytext; 296 while (*yptr != ' ' && *yptr != '\t') 297 yptr++; 298 *yptr = '\0'; 299 yylval.sym = symtable_get(yytext); 300 string_buf_ptr = string_buf; 301 BEGIN MACROBODY; 302 return T_SYMBOL; 303 } 304<MACRODEF>{WORD}\( { 305 /* 306 * We store the symbol with its opening 307 * parren so we can differentiate macros 308 * that take args from macros with the 309 * same name that do not take args as 310 * is allowed in C. 311 */ 312 BEGIN MACROARGLIST; 313 yylval.sym = symtable_get(yytext); 314 unput('('); 315 return T_SYMBOL; 316 } 317<MACROARGLIST>{WORD} { 318 yylval.str = yytext; 319 return T_ARG; 320 } 321<MACROARGLIST>{SPACE} ; 322<MACROARGLIST>[(,] { 323 return yytext[0]; 324 } 325<MACROARGLIST>[)] { 326 string_buf_ptr = string_buf; 327 BEGIN MACROBODY; 328 return ')'; 329 } 330<MACROARGLIST>. { 331 snprintf(buf, sizeof(buf), "Invalid character " 332 "'%c' in macro argument list", 333 yytext[0]); 334 stop(buf, EX_DATAERR); 335 } 336<MACROCALLARGS>{SPACE} ; 337<MACROCALLARGS>\( { 338 parren_count++; 339 if (parren_count == 1) 340 return ('('); 341 *string_buf_ptr++ = '('; 342 } 343<MACROCALLARGS>\) { 344 parren_count--; 345 if (parren_count == 0) { 346 BEGIN INITIAL; 347 return (')'); 348 } 349 *string_buf_ptr++ = ')'; 350 } 351<MACROCALLARGS>{MCARG} { 352 char *yptr; 353 354 yptr = yytext; 355 while (*yptr) 356 *string_buf_ptr++ = *yptr++; 357 } 358<MACROCALLARGS>\, { 359 if (string_buf_ptr != string_buf) { 360 /* 361 * Return an argument and 362 * rescan this comma so we 363 * can return it as well. 364 */ 365 *string_buf_ptr = '\0'; 366 yylval.str = string_buf; 367 string_buf_ptr = string_buf; 368 unput(','); 369 return T_ARG; 370 } 371 return ','; 372 } 373<MACROBODY>\\\n { 374 /* Eat escaped newlines. */ 375 ++yylineno; 376 } 377<MACROBODY>\r ; 378<MACROBODY>\n { 379 /* Macros end on the first unescaped newline. */ 380 BEGIN INITIAL; 381 *string_buf_ptr = '\0'; 382 yylval.str = string_buf; 383 ++yylineno; 384 return T_MACROBODY; 385 } 386<MACROBODY>{MBODY} { 387 char *yptr; 388 char c; 389 390 yptr = yytext; 391 while (c = *yptr++) { 392 /* 393 * Strip carriage returns. 394 */ 395 if (c == '\r') 396 continue; 397 *string_buf_ptr++ = c; 398 } 399 } 400{WORD}\( { 401 char *yptr; 402 char *ycopy; 403 404 /* May be a symbol or a macro invocation. */ 405 yylval.sym = symtable_get(yytext); 406 if (yylval.sym->type == MACRO) { 407 YY_BUFFER_STATE old_state; 408 YY_BUFFER_STATE temp_state; 409 410 ycopy = strdup(yytext); 411 yptr = ycopy + yyleng; 412 while (yptr > ycopy) 413 unput(*--yptr); 414 old_state = YY_CURRENT_BUFFER; 415 temp_state = 416 yy_create_buffer(stdin, 417 YY_BUF_SIZE); 418 yy_switch_to_buffer(temp_state); 419 mm_switch_to_buffer(old_state); 420 mmparse(); 421 mm_switch_to_buffer(temp_state); 422 yy_switch_to_buffer(old_state); 423 mm_delete_buffer(temp_state); 424 expand_macro(yylval.sym); 425 } else { 426 if (yylval.sym->type == UNINITIALIZED) { 427 /* Try without the '(' */ 428 symbol_delete(yylval.sym); 429 yytext[yyleng-1] = '\0'; 430 yylval.sym = 431 symtable_get(yytext); 432 } 433 unput('('); 434 return T_SYMBOL; 435 } 436 } 437{WORD} { 438 yylval.sym = symtable_get(yytext); 439 if (yylval.sym->type == MACRO) { 440 expand_macro(yylval.sym); 441 } else { 442 return T_SYMBOL; 443 } 444 } 445. { 446 snprintf(buf, sizeof(buf), "Invalid character " 447 "'%c'", yytext[0]); 448 stop(buf, EX_DATAERR); 449 } 450%% 451 452typedef struct include { 453 YY_BUFFER_STATE buffer; 454 int lineno; 455 char *filename; 456 SLIST_ENTRY(include) links; 457}include_t; 458 459SLIST_HEAD(, include) include_stack; 460 461void 462include_file(char *file_name, include_type type) 463{ 464 FILE *newfile; 465 include_t *include; 466 467 newfile = NULL; 468 /* Try the current directory first */ 469 if (includes_search_curdir != 0 || type == SOURCE_FILE) 470 newfile = fopen(file_name, "r"); 471 472 if (newfile == NULL && type != SOURCE_FILE) { 473 path_entry_t include_dir; 474 for (include_dir = search_path.slh_first; 475 include_dir != NULL; 476 include_dir = include_dir->links.sle_next) { 477 char fullname[PATH_MAX]; 478 479 if ((include_dir->quoted_includes_only == TRUE) 480 && (type != QUOTED_INCLUDE)) 481 continue; 482 483 snprintf(fullname, sizeof(fullname), 484 "%s/%s", include_dir->directory, file_name); 485 486 if ((newfile = fopen(fullname, "r")) != NULL) 487 break; 488 } 489 } 490 491 if (newfile == NULL) { 492 perror(file_name); 493 stop("Unable to open input file", EX_SOFTWARE); 494 /* NOTREACHED */ 495 } 496 497 if (type != SOURCE_FILE) { 498 include = (include_t *)malloc(sizeof(include_t)); 499 if (include == NULL) { 500 stop("Unable to allocate include stack entry", 501 EX_SOFTWARE); 502 /* NOTREACHED */ 503 } 504 include->buffer = YY_CURRENT_BUFFER; 505 include->lineno = yylineno; 506 include->filename = yyfilename; 507 SLIST_INSERT_HEAD(&include_stack, include, links); 508 } 509 yy_switch_to_buffer(yy_create_buffer(newfile, YY_BUF_SIZE)); 510 yylineno = 1; 511 yyfilename = strdup(file_name); 512} 513 514static void next_substitution(struct symbol *mac_symbol, const char *body_pos, 515 const char **next_match, 516 struct macro_arg **match_marg, regmatch_t *match); 517 518void 519expand_macro(struct symbol *macro_symbol) 520{ 521 struct macro_arg *marg; 522 struct macro_arg *match_marg; 523 const char *body_head; 524 const char *body_pos; 525 const char *next_match; 526 527 /* 528 * Due to the nature of unput, we must work 529 * backwards through the macro body performing 530 * any expansions. 531 */ 532 body_head = macro_symbol->info.macroinfo->body; 533 body_pos = body_head + strlen(body_head); 534 while (body_pos > body_head) { 535 regmatch_t match; 536 537 next_match = body_head; 538 match_marg = NULL; 539 next_substitution(macro_symbol, body_pos, &next_match, 540 &match_marg, &match); 541 542 /* Put back everything up until the replacement. */ 543 while (body_pos > next_match) 544 unput(*--body_pos); 545 546 /* Perform the replacement. */ 547 if (match_marg != NULL) { 548 const char *strp; 549 550 next_match = match_marg->replacement_text; 551 strp = next_match + strlen(next_match); 552 while (strp > next_match) 553 unput(*--strp); 554 555 /* Skip past the unexpanded macro arg. */ 556 body_pos -= match.rm_eo - match.rm_so; 557 } 558 } 559 560 /* Cleanup replacement text. */ 561 STAILQ_FOREACH(marg, ¯o_symbol->info.macroinfo->args, links) { 562 free(marg->replacement_text); 563 } 564} 565 566/* 567 * Find the next substitution in the macro working backwards from 568 * body_pos until the beginning of the macro buffer. next_match 569 * should be initialized to the beginning of the macro buffer prior 570 * to calling this routine. 571 */ 572static void 573next_substitution(struct symbol *mac_symbol, const char *body_pos, 574 const char **next_match, struct macro_arg **match_marg, 575 regmatch_t *match) 576{ 577 regmatch_t matches[2]; 578 struct macro_arg *marg; 579 const char *search_pos; 580 int retval; 581 582 do { 583 search_pos = *next_match; 584 585 STAILQ_FOREACH(marg, &mac_symbol->info.macroinfo->args, links) { 586 587 retval = regexec(&marg->arg_regex, search_pos, 2, 588 matches, 0); 589 if (retval == 0 590 && (matches[1].rm_eo + search_pos) <= body_pos 591 && (matches[1].rm_eo + search_pos) > *next_match) { 592 *match = matches[1]; 593 *next_match = match->rm_eo + search_pos; 594 *match_marg = marg; 595 } 596 } 597 } while (search_pos != *next_match); 598} 599 600int 601yywrap() 602{ 603 include_t *include; 604 605 yy_delete_buffer(YY_CURRENT_BUFFER); 606 (void)fclose(yyin); 607 if (yyfilename != NULL) 608 free(yyfilename); 609 yyfilename = NULL; 610 include = include_stack.slh_first; 611 if (include != NULL) { 612 yy_switch_to_buffer(include->buffer); 613 yylineno = include->lineno; 614 yyfilename = include->filename; 615 SLIST_REMOVE_HEAD(&include_stack, links); 616 free(include); 617 return (0); 618 } 619 return (1); 620} 621