sys/dev/disk/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#18 $
  42  *
  43  * $FreeBSD: src/sys/dev/aic7xxx/aicasm/aicasm_scan.l,v 1.13.2.6 2002/09/27 15:46:28 gibbs Exp $
  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 "/*"                    { BEGIN COMMENT;  /* Enter comment eating state */ }
  91 <COMMENT>"/*"           { fprintf(stderr, "Warning! Comment within comment."); }
  92 <COMMENT>\n             { ++yylineno; }
  93 <COMMENT>[^*/\n]*       ;
  94 <COMMENT>"*"+[^*/\n]*   ;
  95 <COMMENT>"/"+[^*/\n]*   ;
  96 <COMMENT>"*"+"/"        { BEGIN INITIAL; }
  97 if[ \t]*\(              {
  98                                 string_buf_ptr = string_buf;
  99                                 parren_count = 1;
 100                                 BEGIN CEXPR;
 101                                 return T_IF;
 102                         }
 103 <CEXPR>\(               {       *string_buf_ptr++ = '('; parren_count++; }
 104 <CEXPR>\)               {
 105                                 parren_count--;
 106                                 if (parren_count == 0) {
 107                                         /* All done */
 108                                         BEGIN INITIAL;
 109                                         *string_buf_ptr = '\0';
 110                                         yylval.sym = symtable_get(string_buf);
 111                                         return T_CEXPR;
 112                                 } else {
 113                                         *string_buf_ptr++ = ')';
 114                                 }
 115                         }
 116 <CEXPR>\n               { ++yylineno; }
 117 <CEXPR>[^()\n]+ {
 118                                 char *yptr;
 119
 120                                 yptr = yytext;
 121                                 while (*yptr != '\0') {
 122                                         /* Remove duplicate spaces */
 123                                         if (*yptr == '\t')
 124                                                 *yptr = ' ';
 125                                         if (*yptr == ' '
 126                                          && string_buf_ptr != string_buf
 127                                          && string_buf_ptr[-1] == ' ')
 128                                                 yptr++;
 129                                         else
 130                                                 *string_buf_ptr++ = *yptr++;
 131                                 }
 132                         }
 133
 134 VERSION                 { return T_VERSION; }
 135 PREFIX                  { return T_PREFIX; }
 136 PATCH_ARG_LIST          { return T_PATCH_ARG_LIST; }
 137 \"                      {
 138                                 string_buf_ptr = string_buf;
 139                                 BEGIN STRING;
 140                         }
 141 <STRING>[^"]+           {
 142                                 char *yptr;
 143
 144                                 yptr = yytext;
 145                                 while (*yptr)
 146                                         *string_buf_ptr++ = *yptr++;
 147                         }
 148 <STRING>\"              {
 149                                 /* All done */
 150                                 BEGIN INITIAL;
 151                                 *string_buf_ptr = '\0';
 152                                 yylval.str = string_buf;
 153                                 return T_STRING;
 154                         }
 155 {SPACE}                  ;
 156
 157         /* Register/SCB/SRAM definition keywords */
 158 export                  { return T_EXPORT; }
 159 register                { return T_REGISTER; }
 160 const                   { yylval.value = FALSE; return T_CONST; }
 161 download                { return T_DOWNLOAD; }
 162 address                 { return T_ADDRESS; }
 163 access_mode             { return T_ACCESS_MODE; }
 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 BEGIN_CRITICAL          { return T_BEGIN_CS; }
 175 END_CRITICAL            { return T_END_CS; }
 176 SET_SRC_MODE            { return T_SET_SRC_MODE; }
 177 SET_DST_MODE            { return T_SET_DST_MODE; }
 178 field                   { return T_FIELD; }
 179 enum                    { return T_ENUM; }
 180 mask                    { return T_MASK; }
 181 alias                   { return T_ALIAS; }
 182 size                    { return T_SIZE; }
 183 scb                     { return T_SCB; }
 184 scratch_ram             { return T_SRAM; }
 185 accumulator             { return T_ACCUM; }
 186 mode_pointer            { return T_MODE_PTR; }
 187 allones                 { return T_ALLONES; }
 188 allzeros                { return T_ALLZEROS; }
 189 none                    { return T_NONE; }
 190 sindex                  { return T_SINDEX; }
 191 A                       { return T_A; }
 192
 193         /* Opcodes */
 194 shl                     { return T_SHL; }
 195 shr                     { return T_SHR; }
 196 ror                     { return T_ROR; }
 197 rol                     { return T_ROL; }
 198 mvi                     { return T_MVI; }
 199 mov                     { return T_MOV; }
 200 clr                     { return T_CLR; }
 201 jmp                     { return T_JMP; }
 202 jc                      { return T_JC;  }
 203 jnc                     { return T_JNC; }
 204 je                      { return T_JE;  }
 205 jne                     { return T_JNE; }
 206 jz                      { return T_JZ;  }
 207 jnz                     { return T_JNZ; }
 208 call                    { return T_CALL; }
 209 add                     { return T_ADD; }
 210 adc                     { return T_ADC; }
 211 bmov                    { return T_BMOV; }
 212 inc                     { return T_INC; }
 213 dec                     { return T_DEC; }
 214 stc                     { return T_STC; }
 215 clc                     { return T_CLC; }
 216 cmp                     { return T_CMP; }
 217 not                     { return T_NOT; }
 218 xor                     { return T_XOR; }
 219 test                    { return T_TEST;}
 220 and                     { return T_AND; }
 221 or                      { return T_OR;  }
 222 ret                     { return T_RET; }
 223 nop                     { return T_NOP; }
 224 else                    { return T_ELSE; }
 225
 226         /* Allowed Symbols */
 227 \<\<                    { return T_EXPR_LSHIFT; }
 228 \>\>                    { return T_EXPR_RSHIFT; }
 229 [-+,:()~|&."{};<>[\]/*!=] { return yytext[0]; }
 230
 231         /* Number processing */
 232 0[0-7]*                 {
 233                                 yylval.value = strtol(yytext, NULL, 8);
 234                                 return T_NUMBER;
 235                         }
 236
 237 0[xX][0-9a-fA-F]+       {
 238                                 yylval.value = strtoul(yytext + 2, NULL, 16);
 239                                 return T_NUMBER;
 240                         }
 241
 242 [1-9][0-9]*             {
 243                                 yylval.value = strtol(yytext, NULL, 10);
 244                                 return T_NUMBER;
 245                         }
 246         /* Include Files */
 247 #include{SPACE}         {
 248                                 BEGIN INCLUDE;
 249                                 quote_count = 0;
 250                                 return T_INCLUDE;
 251                         }
 252 <INCLUDE>[<]            { return yytext[0]; }
 253 <INCLUDE>[>]            { BEGIN INITIAL; return yytext[0]; }
 254 <INCLUDE>[\"]           {
 255                                 if (quote_count != 0)
 256                                         BEGIN INITIAL;
 257                                 quote_count++;
 258                                 return yytext[0];
 259                         }
 260 <INCLUDE>{PATH}         {
 261                                 char *yptr;
 262
 263                                 yptr = yytext;
 264                                 string_buf_ptr = string_buf;
 265                                 while (*yptr)
 266                                         *string_buf_ptr++ = *yptr++;
 267                                 yylval.str = string_buf;
 268                                 *string_buf_ptr = '\0';
 269                                 return T_PATH;
 270                         }
 271 <INCLUDE>.              { stop("Invalid include line", EX_DATAERR); }
 272 #define{SPACE}          {
 273                                 BEGIN MACRODEF;
 274                                 return T_DEFINE;
 275                         }
 276 <MACRODEF>{WORD}{SPACE} {
 277                                 char *yptr;
 278
 279                                 /* Strip space and return as a normal symbol */
 280                                 yptr = yytext;
 281                                 while (*yptr != ' ' && *yptr != '\t')
 282                                         yptr++;
 283                                 *yptr = '\0';
 284                                 yylval.sym = symtable_get(yytext);
 285                                 string_buf_ptr = string_buf;
 286                                 BEGIN MACROBODY;
 287                                 return T_SYMBOL;
 288                         }
 289 <MACRODEF>{WORD}\(      {
 290                                 /*
 291                                  * We store the symbol with its opening
 292                                  * parren so we can differentiate macros
 293                                  * that take args from macros with the
 294                                  * same name that do not take args as
 295                                  * is allowed in C.
 296                                  */
 297                                 BEGIN MACROARGLIST;
 298                                 yylval.sym = symtable_get(yytext);
 299                                 unput('(');
 300                                 return T_SYMBOL;
 301                         }
 302 <MACROARGLIST>{WORD}    {
 303                                 yylval.str = yytext;
 304                                 return T_ARG;
 305                         }
 306 <MACROARGLIST>{SPACE}   ;
 307 <MACROARGLIST>[(,]      {
 308                                 return yytext[0];
 309                         }
 310 <MACROARGLIST>[)]       {
 311                                 string_buf_ptr = string_buf;
 312                                 BEGIN MACROBODY;
 313                                 return ')';
 314                         }
 315 <MACROARGLIST>.         {
 316                                 snprintf(buf, sizeof(buf), "Invalid character "
 317                                          "'%c' in macro argument list",
 318                                          yytext[0]);
 319                                 stop(buf, EX_DATAERR);
 320                         }
 321 <MACROCALLARGS>{SPACE}  ;
 322 <MACROCALLARGS>\(       {
 323                                 parren_count++;
 324                                 if (parren_count == 1)
 325                                         return ('(');
 326                                 *string_buf_ptr++ = '(';
 327                         }
 328 <MACROCALLARGS>\)       {
 329                                 parren_count--;
 330                                 if (parren_count == 0) {
 331                                         BEGIN INITIAL;
 332                                         return (')');
 333                                 }
 334                                 *string_buf_ptr++ = ')';
 335                         }
 336 <MACROCALLARGS>{MCARG}  {
 337                                 char *yptr;
 338
 339                                 yptr = yytext;
 340                                 while (*yptr)
 341                                         *string_buf_ptr++ = *yptr++;
 342                         }
 343 <MACROCALLARGS>\,       {
 344                                 if (string_buf_ptr != string_buf) {
 345                                         /*
 346                                          * Return an argument and
 347                                          * rescan this comma so we
 348                                          * can return it as well.
 349                                          */
 350                                         *string_buf_ptr = '\0';
 351                                         yylval.str = string_buf;
 352                                         string_buf_ptr = string_buf;
 353                                         unput(',');
 354                                         return T_ARG;
 355                                 }
 356                                 return ',';
 357                         }
 358 <MACROBODY>\\\n         {
 359                                 /* Eat escaped newlines. */
 360                                 ++yylineno;
 361                         }
 362 <MACROBODY>\n           {
 363                                 /* Macros end on the first unescaped newline. */
 364                                 BEGIN INITIAL;
 365                                 *string_buf_ptr = '\0';
 366                                 yylval.str = string_buf;
 367                                 ++yylineno;
 368                                 return T_MACROBODY;
 369                         }
 370 <MACROBODY>{MBODY}      {
 371                                 char *yptr;
 372
 373                                 yptr = yytext;
 374                                 while (*yptr)
 375                                         *string_buf_ptr++ = *yptr++;
 376                         }
 377 {WORD}\(                {
 378                                 char *yptr;
 379                                 char *ycopy;
 380
 381                                 /* May be a symbol or a macro invocation. */
 382                                 yylval.sym = symtable_get(yytext);
 383                                 if (yylval.sym->type == MACRO) {
 384                                         YY_BUFFER_STATE old_state;
 385                                         YY_BUFFER_STATE temp_state;
 386
 387                                         ycopy = strdup(yytext);
 388                                         yptr = ycopy + yyleng;
 389                                         while (yptr > ycopy)
 390                                                 unput(*--yptr);
 391                                         old_state = YY_CURRENT_BUFFER;
 392                                         temp_state =
 393                                             yy_create_buffer(stdin,
 394                                                              YY_BUF_SIZE);
 395                                         yy_switch_to_buffer(temp_state);
 396                                         mm_switch_to_buffer(old_state);
 397                                         mmparse();
 398                                         mm_switch_to_buffer(temp_state);
 399                                         yy_switch_to_buffer(old_state);
 400                                         mm_delete_buffer(temp_state);
 401                                         expand_macro(yylval.sym);
 402                                 } else {
 403                                         if (yylval.sym->type == UNINITIALIZED) {
 404                                                 /* Try without the '(' */
 405                                                 symbol_delete(yylval.sym);
 406                                                 yytext[yyleng-1] = '\0';
 407                                                 yylval.sym =
 408                                                     symtable_get(yytext);
 409                                         }
 410                                         unput('(');
 411                                         return T_SYMBOL;
 412                                 }
 413                         }
 414 {WORD}                  {
 415                                 yylval.sym = symtable_get(yytext);
 416                                 if (yylval.sym->type == MACRO) {
 417                                         expand_macro(yylval.sym);
 418                                 } else {
 419                                         return T_SYMBOL;
 420                                 }
 421                         }
 422 .                       {
 423                                 snprintf(buf, sizeof(buf), "Invalid character "
 424                                          "'%c'", yytext[0]);
 425                                 stop(buf, EX_DATAERR);
 426                         }
 427 %%
 428
 429 typedef struct include {
 430         YY_BUFFER_STATE  buffer;
 431         int              lineno;
 432         char            *filename;
 433         SLIST_ENTRY(include) links;
 434 }include_t;
 435
 436 SLIST_HEAD(, include) include_stack;
 437
 438 void
 439 include_file(char *file_name, include_type type)
 440 {
 441         FILE *newfile;
 442         include_t *include;
 443
 444         newfile = NULL;
 445         /* Try the current directory first */
 446         if (includes_search_curdir != 0 || type == SOURCE_FILE)
 447                 newfile = fopen(file_name, "r");
 448
 449         if (newfile == NULL && type != SOURCE_FILE) {
 450                 path_entry_t include_dir;
 451                 for (include_dir = search_path.slh_first;
 452                      include_dir != NULL;
 453                      include_dir = include_dir->links.sle_next) {
 454                         char fullname[PATH_MAX];
 455
 456                         if ((include_dir->quoted_includes_only == TRUE)
 457                          && (type != QUOTED_INCLUDE))
 458                                 continue;
 459
 460                         snprintf(fullname, sizeof(fullname),
 461                                  "%s/%s", include_dir->directory, file_name);
 462
 463                         if ((newfile = fopen(fullname, "r")) != NULL)
 464                                 break;
 465                 }
 466         }
 467
 468         if (newfile == NULL) {
 469                 perror(file_name);
 470                 stop("Unable to open input file", EX_SOFTWARE);
 471                 /* NOTREACHED */
 472         }
 473
 474         if (type != SOURCE_FILE) {
 475                 include = (include_t *)malloc(sizeof(include_t));
 476                 if (include == NULL) {
 477                         stop("Unable to allocate include stack entry",
 478                              EX_SOFTWARE);
 479                         /* NOTREACHED */
 480                 }
 481                 include->buffer = YY_CURRENT_BUFFER;
 482                 include->lineno = yylineno;
 483                 include->filename = yyfilename;
 484                 SLIST_INSERT_HEAD(&include_stack, include, links);
 485         }
 486         yy_switch_to_buffer(yy_create_buffer(newfile, YY_BUF_SIZE));
 487         yylineno = 1;
 488         yyfilename = strdup(file_name);
 489 }
 490
 491 static void next_substitution(struct symbol *mac_symbol, const char *body_pos,
 492                               const char **next_match,
 493                               struct macro_arg **match_marg, regmatch_t *match);
 494
 495 void
 496 expand_macro(struct symbol *macro_symbol)
 497 {
 498         struct macro_arg *marg;
 499         struct macro_arg *match_marg;
 500         const char *body_head;
 501         const char *body_pos;
 502         const char *next_match;
 503
 504         /*
 505          * Due to the nature of unput, we must work
 506          * backwards through the macro body performing
 507          * any expansions.
 508          */
 509         body_head = macro_symbol->info.macroinfo->body;
 510         body_pos = body_head + strlen(body_head);
 511         while (body_pos > body_head) {
 512                 regmatch_t match;
 513
 514                 next_match = body_head;
 515                 match_marg = NULL;
 516                 next_substitution(macro_symbol, body_pos, &next_match,
 517                                   &match_marg, &match);
 518
 519                 /* Put back everything up until the replacement. */
 520                 while (body_pos > next_match)
 521                         unput(*--body_pos);
 522
 523                 /* Perform the replacement. */
 524                 if (match_marg != NULL) {
 525                         const char *strp;
 526
 527                         next_match = match_marg->replacement_text;
 528                         strp = next_match + strlen(next_match);
 529                         while (strp > next_match)
 530                                 unput(*--strp);
 531
 532                         /* Skip past the unexpanded macro arg. */
 533                         body_pos -= match.rm_eo - match.rm_so;
 534                 }
 535         }
 536
 537         /* Cleanup replacement text. */
 538         STAILQ_FOREACH(marg, &macro_symbol->info.macroinfo->args, links) {
 539                 free(marg->replacement_text);
 540         }
 541 }
 542
 543 /*
 544  * Find the next substitution in the macro working backwards from
 545  * body_pos until the beginning of the macro buffer.  next_match
 546  * should be initialized to the beginning of the macro buffer prior
 547  * to calling this routine.
 548  */
 549 static void
 550 next_substitution(struct symbol *mac_symbol, const char *body_pos,
 551                   const char **next_match, struct macro_arg **match_marg,
 552                   regmatch_t *match)
 553 {
 554         regmatch_t        matches[2];
 555         struct macro_arg *marg;
 556         const char       *search_pos;
 557         int               retval;
 558
 559         do {
 560                 search_pos = *next_match;
 561
 562                 STAILQ_FOREACH(marg, &mac_symbol->info.macroinfo->args, links) {
 563
 564                         retval = regexec(&marg->arg_regex, search_pos, 2,
 565                                          matches, 0);
 566                         if (retval == 0
 567                          && (matches[1].rm_eo + search_pos) <= body_pos
 568                          && (matches[1].rm_eo + search_pos) > *next_match) {
 569                                 *match = matches[1];
 570                                 *next_match = match->rm_eo + search_pos;
 571                                 *match_marg = marg;
 572                         }
 573                 }
 574         } while (search_pos != *next_match);
 575 }
 576
 577 int
 578 yywrap()
 579 {
 580         include_t *include;
 581
 582         yy_delete_buffer(YY_CURRENT_BUFFER);
 583         (void)fclose(yyin);
 584         if (yyfilename != NULL)
 585                 free(yyfilename);
 586         yyfilename = NULL;
 587         include = include_stack.slh_first;
 588         if (include != NULL) {
 589                 yy_switch_to_buffer(include->buffer);
 590                 yylineno = include->lineno;
 591                 yyfilename = include->filename;
 592                 SLIST_REMOVE_HEAD(&include_stack, links);
 593                 free(include);
 594                 return (0);
 595         }
 596         return (1);
 597 }