drivers/scsi/aic7xxx/aicasm/aicasm_scan.l

   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: //depot/aic7xxx/aic7xxx/aicasm/aicasm_scan.l#20 $
  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
  66 static char string_buf[MAX_STR_CONST];
  67 static char *string_buf_ptr;
  68 static int  parren_count;
  69 static int  quote_count;
  70 static char buf[255];
  71 %}
  72
  73 PATH            ([/]*[-A-Za-z0-9_.])+
  74 WORD            [A-Za-z_][-A-Za-z_0-9]*
  75 SPACE           [ \t]+
  76 MCARG           [^(), \t]+
  77 MBODY           ((\\[^\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; }
  98 if[ \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                         }
 135 else                    { return T_ELSE; }
 136 VERSION                 { return T_VERSION; }
 137 PREFIX                  { return T_PREFIX; }
 138 PATCH_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 */
 160 export                  { return T_EXPORT; }
 161 register                { return T_REGISTER; }
 162 const                   { yylval.value = FALSE; return T_CONST; }
 163 download                { return T_DOWNLOAD; }
 164 address                 { return T_ADDRESS; }
 165 access_mode             { return T_ACCESS_MODE; }
 166 modes                   { return T_MODES; }
 167 RW|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                         }
 176 field                   { return T_FIELD; }
 177 enum                    { return T_ENUM; }
 178 mask                    { return T_MASK; }
 179 alias                   { return T_ALIAS; }
 180 size                    { return T_SIZE; }
 181 scb                     { return T_SCB; }
 182 scratch_ram             { return T_SRAM; }
 183 accumulator             { return T_ACCUM; }
 184 mode_pointer            { return T_MODE_PTR; }
 185 allones                 { return T_ALLONES; }
 186 allzeros                { return T_ALLZEROS; }
 187 none                    { return T_NONE; }
 188 sindex                  { return T_SINDEX; }
 189 A                       { return T_A; }
 190
 191         /* Instruction Formatting */
 192 PAD_PAGE                { return T_PAD_PAGE; }
 193 BEGIN_CRITICAL          { return T_BEGIN_CS; }
 194 END_CRITICAL            { return T_END_CS; }
 195 SET_SRC_MODE            { return T_SET_SRC_MODE; }
 196 SET_DST_MODE            { return T_SET_DST_MODE; }
 197
 198         /* Opcodes */
 199 shl                     { return T_SHL; }
 200 shr                     { return T_SHR; }
 201 ror                     { return T_ROR; }
 202 rol                     { return T_ROL; }
 203 mvi                     { return T_MVI; }
 204 mov                     { return T_MOV; }
 205 clr                     { return T_CLR; }
 206 jmp                     { return T_JMP; }
 207 jc                      { return T_JC;  }
 208 jnc                     { return T_JNC; }
 209 je                      { return T_JE;  }
 210 jne                     { return T_JNE; }
 211 jz                      { return T_JZ;  }
 212 jnz                     { return T_JNZ; }
 213 call                    { return T_CALL; }
 214 add                     { return T_ADD; }
 215 adc                     { return T_ADC; }
 216 bmov                    { return T_BMOV; }
 217 inc                     { return T_INC; }
 218 dec                     { return T_DEC; }
 219 stc                     { return T_STC; }
 220 clc                     { return T_CLC; }
 221 cmp                     { return T_CMP; }
 222 not                     { return T_NOT; }
 223 xor                     { return T_XOR; }
 224 test                    { return T_TEST;}
 225 and                     { return T_AND; }
 226 or                      { return T_OR;  }
 227 ret                     { return T_RET; }
 228 nop                     { return T_NOP; }
 229
 230         /* ARP2 16bit extensions */
 231 or16                    { return T_OR16; }
 232 and16                   { return T_AND16; }
 233 xor16                   { return T_XOR16; }
 234 add16                   { return T_ADD16; }
 235 adc16                   { return T_ADC16; }
 236 mvi16                   { return T_MVI16; }
 237 test16                  { return T_TEST16; }
 238 cmp16                   { return T_CMP16; }
 239 cmpxchg                 { 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 */
 247 0[0-7]*                 {
 248                                 yylval.value = strtol(yytext, NULL, 8);
 249                                 return T_NUMBER;
 250                         }
 251
 252 0[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
 452 typedef struct include {
 453         YY_BUFFER_STATE  buffer;
 454         int              lineno;
 455         char            *filename;
 456         SLIST_ENTRY(include) links;
 457 }include_t;
 458
 459 SLIST_HEAD(, include) include_stack;
 460
 461 void
 462 include_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
 514 static 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
 518 void
 519 expand_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, &macro_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  */
 572 static void
 573 next_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
 600 int
 601 yywrap()
 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 }