Pull sn-handle-sc-powerdown into release branch
[linux-2.6] / 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 }