aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/aic7xxx/aicasm/aicasm_scan.l
blob: 2c7f02daf88d21387967be473c660dcc9a2c1a0e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
%{
/*
 * Lexical Analyzer for the Aic7xxx SCSI Host adapter sequencer assembler.
 *
 * Copyright (c) 1997, 1998, 2000 Justin T. Gibbs.
 * Copyright (c) 2001, 2002 Adaptec Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm_scan.l#20 $
 *
 * $FreeBSD$
 */

#include <sys/types.h>

#include <inttypes.h>
#include <limits.h>
#include <regex.h>
#include <stdio.h>
#include <string.h>
#include <sysexits.h>
#ifdef __linux__
#include "../queue.h"
#else
#include <sys/queue.h>
#endif

#include "aicasm.h"
#include "aicasm_symbol.h"
#include "aicasm_gram.h"

/* This is used for macro body capture too, so err on the large size. */
#define MAX_STR_CONST 4096
static char string_buf[MAX_STR_CONST];
static char *string_buf_ptr;
static int  parren_count;
static int  quote_count;
static char buf[255];
%}

PATH		([/]*[-A-Za-z0-9_.])+
WORD		[A-Za-z_][-A-Za-z_0-9]*
SPACE		[ \t]+
MCARG		[^(), \t]+
MBODY		((\\[^\n])*[^\n\\]*)+

%x COMMENT
%x CEXPR
%x INCLUDE
%x STRING
%x MACRODEF
%x MACROARGLIST
%x MACROCALLARGS
%x MACROBODY

%%
\n			{ ++yylineno; }
\r			;
"/*"			{ BEGIN COMMENT;  /* Enter comment eating state */ }
<COMMENT>"/*"		{ fprintf(stderr, "Warning! Comment within comment."); }
<COMMENT>\n		{ ++yylineno; }
<COMMENT>[^*/\n]*	;
<COMMENT>"*"+[^*/\n]*	;
<COMMENT>"/"+[^*/\n]*	;
<COMMENT>"*"+"/"	{ BEGIN INITIAL; }
if[ \t]*\(		{
				string_buf_ptr = string_buf;
				parren_count = 1;
				BEGIN CEXPR;
				return T_IF;
			}
<CEXPR>\(		{	*string_buf_ptr++ = '('; parren_count++; }
<CEXPR>\)		{
				parren_count--;
				if (parren_count == 0) {
					/* All done */
					BEGIN INITIAL;
					*string_buf_ptr = '\0';
					yylval.sym = symtable_get(string_buf);
					return T_CEXPR;
				} else {
					*string_buf_ptr++ = ')';
				}
			}
<CEXPR>\n		{ ++yylineno; }
<CEXPR>\r		;
<CEXPR>[^()\n]+	{
				char *yptr;

				yptr = yytext;
				while (*yptr != '\0') {
					/* Remove duplicate spaces */
					if (*yptr == '\t')
						*yptr = ' ';
					if (*yptr == ' '
					 && string_buf_ptr != string_buf
					 && string_buf_ptr[-1] == ' ')
						yptr++;
					else 
						*string_buf_ptr++ = *yptr++;
				}
			}
else			{ return T_ELSE; }
VERSION			{ return T_VERSION; }
PREFIX			{ return T_PREFIX; }
PATCH_ARG_LIST		{ return T_PATCH_ARG_LIST; }
\"			{
				string_buf_ptr = string_buf;
				BEGIN STRING;
			}
<STRING>[^"]+		{
				char *yptr;

				yptr = yytext;
				while (*yptr)
					*string_buf_ptr++ = *yptr++;
			}
<STRING>\"		{
				/* All done */
				BEGIN INITIAL;
				*string_buf_ptr = '\0';
				yylval.str = string_buf;
				return T_STRING;
			}
{SPACE}			 ;

	/* Register/SCB/SRAM definition keywords */
export			{ return T_EXPORT; }
register		{ return T_REGISTER; }
const			{ yylval.value = FALSE; return T_CONST; }
download		{ return T_DOWNLOAD; }
address			{ return T_ADDRESS; }
count			{ return T_COUNT; }
access_mode		{ return T_ACCESS_MODE; }
modes			{ return T_MODES; }
RW|RO|WO		{
				 if (strcmp(yytext, "RW") == 0)
					yylval.value = RW;
				 else if (strcmp(yytext, "RO") == 0)
					yylval.value = RO;
				 else
					yylval.value = WO;
				 return T_MODE;
			}
field			{ return T_FIELD; }
enum			{ return T_ENUM; }
mask			{ return T_MASK; }
alias			{ return T_ALIAS; }
size			{ return T_SIZE; }
scb			{ return T_SCB; }
scratch_ram		{ return T_SRAM; }
accumulator		{ return T_ACCUM; }
mode_pointer		{ return T_MODE_PTR; }
allones			{ return T_ALLONES; }
allzeros		{ return T_ALLZEROS; }
none			{ return T_NONE; }
sindex			{ return T_SINDEX; }
A			{ return T_A; }

	/* Instruction Formatting */
PAD_PAGE		{ return T_PAD_PAGE; }
BEGIN_CRITICAL		{ return T_BEGIN_CS; }
END_CRITICAL		{ return T_END_CS; }
SET_SRC_MODE		{ return T_SET_SRC_MODE; }
SET_DST_MODE		{ return T_SET_DST_MODE; }

	/* Opcodes */
shl			{ return T_SHL; }
shr			{ return T_SHR; }
ror			{ return T_ROR; }
rol			{ return T_ROL; }
mvi			{ return T_MVI; }
mov			{ return T_MOV; }
clr			{ return T_CLR; }
jmp			{ return T_JMP; }
jc			{ return T_JC;	}
jnc			{ return T_JNC;	}
je			{ return T_JE;	}
jne			{ return T_JNE;	}
jz			{ return T_JZ;	}
jnz			{ return T_JNZ;	}
call			{ return T_CALL; }
add			{ return T_ADD; }
adc			{ return T_ADC; }
bmov			{ return T_BMOV; }
inc			{ return T_INC; }
dec			{ return T_DEC; }
stc			{ return T_STC;	}
clc			{ return T_CLC; }
cmp			{ return T_CMP;	}
not			{ return T_NOT;	}
xor			{ return T_XOR;	}
test			{ return T_TEST;}
and			{ return T_AND;	}
or			{ return T_OR;	}
ret			{ return T_RET; }
nop			{ return T_NOP; }

	/* ARP2 16bit extensions */
	/* or16			{ return T_OR16; } */
	/* and16			{ return T_AND16; }*/
	/* xor16			{ return T_XOR16; }*/
	/* add16			{ return T_ADD16; }*/
	/* adc16			{ return T_ADC16; }*/
	/* mvi16			{ return T_MVI16; }*/
	/* test16			{ return T_TEST16; }*/
	/* cmp16			{ return T_CMP16; }*/
	/* cmpxchg			{ return T_CMPXCHG; }*/

	/* Allowed Symbols */
\<\<			{ return T_EXPR_LSHIFT; }
\>\>			{ return T_EXPR_RSHIFT; }
[-+,:()~|&."{};<>[\]/*!=] { return yytext[0]; }

	/* Number processing */
0[0-7]*			{
				yylval.value = strtol(yytext, NULL, 8);
				return T_NUMBER;
			}

0[xX][0-9a-fA-F]+	{
				yylval.value = strtoul(yytext + 2, NULL, 16);
				return T_NUMBER;
			}

[1-9][0-9]*		{
				yylval.value = strtol(yytext, NULL, 10);
				return T_NUMBER;
			}
	/* Include Files */
#include{SPACE}		{
				BEGIN INCLUDE;
				quote_count = 0;
				return T_INCLUDE;
			}
<INCLUDE>[<]		{ return yytext[0]; }
<INCLUDE>[>]		{ BEGIN INITIAL; return yytext[0]; }
<INCLUDE>[\"]		{
				if (quote_count != 0)
					BEGIN INITIAL;
				quote_count++;
				return yytext[0];
			}
<INCLUDE>{PATH}		{
				char *yptr;

				yptr = yytext;
				string_buf_ptr = string_buf;
				while (*yptr)
					*string_buf_ptr++ = *yptr++;
				yylval.str = string_buf;
				*string_buf_ptr = '\0';
				return T_PATH;
			}
<INCLUDE>.		{ stop("Invalid include line", EX_DATAERR); }
#define{SPACE}		{
				BEGIN MACRODEF;
				return T_DEFINE;
			}
<MACRODEF>{WORD}{SPACE}	{ 
				char *yptr;

				/* Strip space and return as a normal symbol */
				yptr = yytext;
				while (*yptr != ' ' && *yptr != '\t')
					yptr++;
				*yptr = '\0';
				yylval.sym = symtable_get(yytext);
				string_buf_ptr = string_buf;
				BEGIN MACROBODY;
				return T_SYMBOL;
			}
<MACRODEF>{WORD}\(	{
				/*
				 * We store the symbol with its opening
				 * parren so we can differentiate macros
				 * that take args from macros with the
				 * same name that do not take args as
				 * is allowed in C.
				 */
				BEGIN MACROARGLIST;
				yylval.sym = symtable_get(yytext);
				unput('(');
				return T_SYMBOL;
			}
<MACROARGLIST>{WORD}	{
				yylval.str = yytext;
				return T_ARG;
			}
<MACROARGLIST>{SPACE}   ;
<MACROARGLIST>[(,]	{
				return yytext[0];
			}
<MACROARGLIST>[)]	{
				string_buf_ptr = string_buf;
				BEGIN MACROBODY;
				return ')';
			}
<MACROARGLIST>.		{
				snprintf(buf, sizeof(buf), "Invalid character "
					 "'%c' in macro argument list",
					 yytext[0]);
				stop(buf, EX_DATAERR);
			}
<MACROCALLARGS>{SPACE}  ;
<MACROCALLARGS>\(	{
				parren_count++;
				if (parren_count == 1)
					return ('(');
				*string_buf_ptr++ = '(';
			}
<MACROCALLARGS>\)	{
				parren_count--;
				if (parren_count == 0) {
					BEGIN INITIAL;
					return (')');
				}
				*string_buf_ptr++ = ')';
			}
<MACROCALLARGS>{MCARG}	{
				char *yptr;

				yptr = yytext;
				while (*yptr)
					*string_buf_ptr++ = *yptr++;
			}
<MACROCALLARGS>\,	{
				if (string_buf_ptr != string_buf) {
					/*
					 * Return an argument and
					 * rescan this comma so we
					 * can return it as well.
					 */
					*string_buf_ptr = '\0';
					yylval.str = string_buf;
					string_buf_ptr = string_buf;
					unput(',');
					return T_ARG;
				}
				return ',';
			}
<MACROBODY>\\\n		{
				/* Eat escaped newlines. */
				++yylineno;
			}
<MACROBODY>\r		;
<MACROBODY>\n		{
				/* Macros end on the first unescaped newline. */
				BEGIN INITIAL;
				*string_buf_ptr = '\0';
				yylval.str = string_buf;
				++yylineno;
				return T_MACROBODY;
			}
<MACROBODY>{MBODY}	{
				char *yptr;
				char c;

				yptr = yytext;
				while (c = *yptr++) {
					/*
					 * Strip carriage returns.
					 */
					if (c == '\r')
						continue;
					*string_buf_ptr++ = c;
				}
			}
{WORD}\(		{
				char *yptr;
				char *ycopy;

				/* May be a symbol or a macro invocation. */
				yylval.sym = symtable_get(yytext);
				if (yylval.sym->type == MACRO) {
					YY_BUFFER_STATE old_state;
					YY_BUFFER_STATE temp_state;

					ycopy = strdup(yytext);
					yptr = ycopy + yyleng;
					while (yptr > ycopy)
						unput(*--yptr);
					old_state = YY_CURRENT_BUFFER;
					temp_state =
					    yy_create_buffer(stdin,
							     YY_BUF_SIZE);
					yy_switch_to_buffer(temp_state);
					mm_switch_to_buffer(old_state);
					mmparse();
					mm_switch_to_buffer(temp_state);
					yy_switch_to_buffer(old_state);
					mm_delete_buffer(temp_state);
					expand_macro(yylval.sym);
				} else {
					if (yylval.sym->type == UNINITIALIZED) {
						/* Try without the '(' */
						symbol_delete(yylval.sym);
						yytext[yyleng-1] = '\0';
						yylval.sym =
						    symtable_get(yytext);
					}
					unput('(');
					return T_SYMBOL;
				}
			}
{WORD}			{
				yylval.sym = symtable_get(yytext);
				if (yylval.sym->type == MACRO) {
					expand_macro(yylval.sym);
				} else {
					return T_SYMBOL;
				}
			}
.			{ 
				snprintf(buf, sizeof(buf), "Invalid character "
					 "'%c'", yytext[0]);
				stop(buf, EX_DATAERR);
			}
%%

typedef struct include {
        YY_BUFFER_STATE  buffer;
        int              lineno;
        char            *filename;
	SLIST_ENTRY(include) links;
}include_t;

SLIST_HEAD(, include) include_stack;

void
include_file(char *file_name, include_type type)
{
	FILE *newfile;
	include_t *include;

	newfile = NULL;
	/* Try the current directory first */
	if (includes_search_curdir != 0 || type == SOURCE_FILE)
		newfile = fopen(file_name, "r");

	if (newfile == NULL && type != SOURCE_FILE) {
                path_entry_t include_dir;
                for (include_dir = search_path.slh_first;
                     include_dir != NULL;                
                     include_dir = include_dir->links.sle_next) {
			char fullname[PATH_MAX];

			if ((include_dir->quoted_includes_only == TRUE)
			 && (type != QUOTED_INCLUDE))
				continue;

			snprintf(fullname, sizeof(fullname),
				 "%s/%s", include_dir->directory, file_name);

			if ((newfile = fopen(fullname, "r")) != NULL)
				break;
                }
        }

	if (newfile == NULL) {
		perror(file_name);
		stop("Unable to open input file", EX_SOFTWARE);
		/* NOTREACHED */
	}

	if (type != SOURCE_FILE) {
		include = (include_t *)malloc(sizeof(include_t));
		if (include == NULL) {
			stop("Unable to allocate include stack entry",
			     EX_SOFTWARE);
			/* NOTREACHED */
		}
		include->buffer = YY_CURRENT_BUFFER;
		include->lineno = yylineno;
		include->filename = yyfilename;
		SLIST_INSERT_HEAD(&include_stack, include, links);
	}
	yy_switch_to_buffer(yy_create_buffer(newfile, YY_BUF_SIZE));
	yylineno = 1;
	yyfilename = strdup(file_name);
}

static void next_substitution(struct symbol *mac_symbol, const char *body_pos,
			      const char **next_match,
			      struct macro_arg **match_marg, regmatch_t *match);

void
expand_macro(struct symbol *macro_symbol)
{
	struct macro_arg *marg;
	struct macro_arg *match_marg;
	const char *body_head;
	const char *body_pos;
	const char *next_match;

	/*
	 * Due to the nature of unput, we must work
	 * backwards through the macro body performing
	 * any expansions.
	 */
	body_head = macro_symbol->info.macroinfo->body;
	body_pos = body_head + strlen(body_head);
	while (body_pos > body_head) {
		regmatch_t match;

		next_match = body_head;
		match_marg = NULL;
		next_substitution(macro_symbol, body_pos, &next_match,
				  &match_marg, &match);

		/* Put back everything up until the replacement. */
		while (body_pos > next_match)
			unput(*--body_pos);

		/* Perform the replacement. */
		if (match_marg != NULL) {
			const char *strp;

			next_match = match_marg->replacement_text;
			strp = next_match + strlen(next_match);
			while (strp > next_match)
				unput(*--strp);

			/* Skip past the unexpanded macro arg. */
			body_pos -= match.rm_eo - match.rm_so;
		}
	}

	/* Cleanup replacement text. */
	STAILQ_FOREACH(marg, &macro_symbol->info.macroinfo->args, links) {
		free(marg->replacement_text);
	}
}

/*
 * Find the next substitution in the macro working backwards from
 * body_pos until the beginning of the macro buffer.  next_match
 * should be initialized to the beginning of the macro buffer prior
 * to calling this routine.
 */
static void
next_substitution(struct symbol *mac_symbol, const char *body_pos,
		  const char **next_match, struct macro_arg **match_marg,
		  regmatch_t *match)
{
	regmatch_t	  matches[2];
	struct macro_arg *marg;
	const char	 *search_pos;
	int		  retval;

	do {
		search_pos = *next_match;

		STAILQ_FOREACH(marg, &mac_symbol->info.macroinfo->args, links) {

			retval = regexec(&marg->arg_regex, search_pos, 2,
					 matches, 0);
			if (retval == 0
			 && (matches[1].rm_eo + search_pos) <= body_pos
			 && (matches[1].rm_eo + search_pos) > *next_match) {
				*match = matches[1];
				*next_match = match->rm_eo + search_pos;
				*match_marg = marg;
			}
		}
	} while (search_pos != *next_match);
}

int
yywrap()
{
	include_t *include;

	yy_delete_buffer(YY_CURRENT_BUFFER);
	(void)fclose(yyin);
	if (yyfilename != NULL)
		free(yyfilename);
	yyfilename = NULL;
	include = include_stack.slh_first;
	if (include != NULL) {
		yy_switch_to_buffer(include->buffer);
		yylineno = include->lineno;
		yyfilename = include->filename;
		SLIST_REMOVE_HEAD(&include_stack, links);
		free(include);
		return (0);
	}
	return (1);
}