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