aboutsummaryrefslogtreecommitdiff
path: root/ld/ldlex.l
blob: 1220852de53ee698c888732895bdb8220800f21d (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
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
%{

/* Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   2000, 2001, 2002  Free Software Foundation, Inc.

This file is part of GLD, the Gnu Linker.

GLD is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GLD is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GLD; see the file COPYING.  If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.  */

/*
This was written by steve chamberlain
                    sac@cygnus.com
*/


#include <ansidecl.h>
#include <stdio.h>

#ifdef MPW
/* Prevent enum redefinition problems. */
#define TRUE_FALSE_ALREADY_DEFINED
#endif /* MPW */

#include "bfd.h"
#include "sysdep.h"
#include "safe-ctype.h"
#include "ld.h"
#include "ldgram.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldfile.h"
#include "ldlex.h"
#include "ldmain.h"
#include "libiberty.h"

/* The type of top-level parser input.
   yylex and yyparse (indirectly) both check this.  */
input_type parser_input;

/* Line number in the current input file.
   (FIXME Actually, it doesn't appear to get reset for each file?)  */
unsigned int lineno = 1;

/* The string we are currently lexing, or NULL if we are reading a
   file.  */
const char *lex_string = NULL;

/* Support for flex reading from more than one input file (stream).
   `include_stack' is flex's input state for each open file;
   `file_name_stack' is the file names.  `lineno_stack' is the current
   line numbers.

   If `include_stack_ptr' is 0, we haven't started reading anything yet.
   Otherwise, stack elements 0 through `include_stack_ptr - 1' are valid.  */

#undef YY_INPUT
#define YY_INPUT(buf,result,max_size) yy_input(buf, &result, max_size)

#define MAX_INCLUDE_DEPTH 10
static YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
static const char *file_name_stack[MAX_INCLUDE_DEPTH];
static unsigned int lineno_stack[MAX_INCLUDE_DEPTH];
static unsigned int include_stack_ptr = 0;
static int vers_node_nesting = 0;

static YY_BUFFER_STATE yy_create_string_buffer PARAMS ((const char *string,
							size_t size));
static void yy_input PARAMS ((char *, int *result, int max_size));

static void comment PARAMS ((void));
static void lex_warn_invalid PARAMS ((char *where, char *what));

/* STATES 
	EXPRESSION	definitely in an expression
	SCRIPT		definitely in a script
	BOTH		either EXPRESSION or SCRIPT
	DEFSYMEXP	in an argument to -defsym
        MRI             in an MRI script
	VERS_START	starting a Sun style mapfile
	VERS_SCRIPT	a Sun style mapfile
	VERS_NODE	a node within a Sun style mapfile
*/
#define RTOKEN(x)  {  yylval.token = x; return x; }

/* Some versions of flex want this.  */
#ifndef yywrap
int yywrap () { return 1; }
#endif
%}

%a 4000
%o 5000

CMDFILENAMECHAR   [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
CMDFILENAMECHAR1  [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
FILENAMECHAR1	[_a-zA-Z\/\.\\\$\_\~]
SYMBOLCHARN     [_a-zA-Z\/\.\\\$\_\~0-9]
FILENAMECHAR	[_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
WILDCHAR	[_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~\?\*]
WHITE		[ \t\n\r]+ 

NOCFILENAMECHAR	[_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]

V_TAG [.$_a-zA-Z][._a-zA-Z0-9]*
V_IDENTIFIER [*?.$_a-zA-Z]([*?.$_a-zA-Z0-9]|::)*

%s SCRIPT
%s EXPRESSION
%s BOTH
%s DEFSYMEXP
%s MRI
%s VERS_START
%s VERS_SCRIPT
%s VERS_NODE
%%

  if (parser_input != input_selected)
    {
      /* The first token of the input determines the initial parser state.  */
      input_type t = parser_input;
      parser_input = input_selected;
      switch (t)
	{
	case input_script: return INPUT_SCRIPT; break;
	case input_mri_script: return INPUT_MRI_SCRIPT; break;
	case input_version_script: return INPUT_VERSION_SCRIPT; break;
	case input_defsym: return INPUT_DEFSYM; break;
	default: abort ();
	}
    }

<BOTH,SCRIPT,EXPRESSION>"/*"	{ comment(); }


<DEFSYMEXP>"-"                  { RTOKEN('-');}
<DEFSYMEXP>"+"                  { RTOKEN('+');}
<DEFSYMEXP>{FILENAMECHAR1}{SYMBOLCHARN}*   { yylval.name = xstrdup(yytext); return NAME; }
<DEFSYMEXP>"="                  { RTOKEN('='); }

<MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
  				yylval.integer = bfd_scan_vma (yytext+1, 0,16);
				return INT;
			}

<MRI,EXPRESSION>([0-9A-Fa-f])+(H|h|X|x|B|b|O|o|D|d) {
				   int ibase ;
				   switch (yytext[yyleng-1]) {
				    case 'X': 
				    case 'x':
				    case 'H':
				    case 'h':
				     ibase = 16;
				     break;
				    case 'O':
				    case 'o':
				     ibase = 8;
				     break;
				    case 'B':
				    case 'b':
				     ibase = 2;
				     break;
				    default:
				     ibase = 10;
				   }
				   yylval.integer = bfd_scan_vma (yytext, 0,
								  ibase);
				   return INT;
				 }
<SCRIPT,DEFSYMEXP,MRI,BOTH,EXPRESSION>((("$"|"0x")([0-9A-Fa-f])+)|(([0-9])+))(M|K|m|k)? {
				  char *s = yytext;

				  if (*s == '$')
				    ++s;
				  yylval.integer = bfd_scan_vma (s, 0, 0);
				  if (yytext[yyleng-1] == 'M'
				      || yytext[yyleng-1] == 'm')
				    yylval.integer *= 1024 * 1024;
				  if (yytext[yyleng-1] == 'K' 
				      || yytext[yyleng-1]=='k')
				    yylval.integer *= 1024;
				  return INT;
				}
<BOTH,SCRIPT,EXPRESSION,MRI>"]"		{ RTOKEN(']');}
<BOTH,SCRIPT,EXPRESSION,MRI>"["		{ RTOKEN('[');}
<BOTH,SCRIPT,EXPRESSION,MRI>"<<="	{ RTOKEN(LSHIFTEQ);}
<BOTH,SCRIPT,EXPRESSION,MRI>">>="	{ RTOKEN(RSHIFTEQ);}
<BOTH,SCRIPT,EXPRESSION,MRI>"||"	{ RTOKEN(OROR);}
<BOTH,SCRIPT,EXPRESSION,MRI>"=="	{ RTOKEN(EQ);}
<BOTH,SCRIPT,EXPRESSION,MRI>"!="	{ RTOKEN(NE);}
<BOTH,SCRIPT,EXPRESSION,MRI>">="	{ RTOKEN(GE);}
<BOTH,SCRIPT,EXPRESSION,MRI>"<="	{ RTOKEN(LE);}
<BOTH,SCRIPT,EXPRESSION,MRI>"<<"	{ RTOKEN(LSHIFT);}
<BOTH,SCRIPT,EXPRESSION,MRI>">>"	{ RTOKEN(RSHIFT);}
<BOTH,SCRIPT,EXPRESSION,MRI>"+="	{ RTOKEN(PLUSEQ);}
<BOTH,SCRIPT,EXPRESSION,MRI>"-="	{ RTOKEN(MINUSEQ);}
<BOTH,SCRIPT,EXPRESSION,MRI>"*="	{ RTOKEN(MULTEQ);}
<BOTH,SCRIPT,EXPRESSION,MRI>"/="	{ RTOKEN(DIVEQ);}
<BOTH,SCRIPT,EXPRESSION,MRI>"&="	{ RTOKEN(ANDEQ);}
<BOTH,SCRIPT,EXPRESSION,MRI>"|="	{ RTOKEN(OREQ);}
<BOTH,SCRIPT,EXPRESSION,MRI>"&&"	{ RTOKEN(ANDAND);}
<BOTH,SCRIPT,EXPRESSION,MRI>">"		{ RTOKEN('>');}
<BOTH,SCRIPT,EXPRESSION,MRI>","		{ RTOKEN(',');}
<BOTH,SCRIPT,EXPRESSION,MRI>"&"		{ RTOKEN('&');}
<BOTH,SCRIPT,EXPRESSION,MRI>"|"		{ RTOKEN('|');}
<BOTH,SCRIPT,EXPRESSION,MRI>"~"		{ RTOKEN('~');}
<BOTH,SCRIPT,EXPRESSION,MRI>"!"		{ RTOKEN('!');}
<BOTH,SCRIPT,EXPRESSION,MRI>"?"		{ RTOKEN('?');}
<BOTH,SCRIPT,EXPRESSION,MRI>"*"		{ RTOKEN('*');}
<BOTH,SCRIPT,EXPRESSION,MRI>"+"		{ RTOKEN('+');}
<BOTH,SCRIPT,EXPRESSION,MRI>"-"		{ RTOKEN('-');}
<BOTH,SCRIPT,EXPRESSION,MRI>"/"		{ RTOKEN('/');}
<BOTH,SCRIPT,EXPRESSION,MRI>"%"		{ RTOKEN('%');}
<BOTH,SCRIPT,EXPRESSION,MRI>"<"		{ RTOKEN('<');}
<BOTH,SCRIPT,EXPRESSION,MRI>"="          { RTOKEN('=');}
<BOTH,SCRIPT,EXPRESSION,MRI>"}"			{ RTOKEN('}') ; }
<BOTH,SCRIPT,EXPRESSION,MRI>"{"			{ RTOKEN('{'); }
<BOTH,SCRIPT,EXPRESSION,MRI>")"			{ RTOKEN(')');}
<BOTH,SCRIPT,EXPRESSION,MRI>"("			{ RTOKEN('(');}
<BOTH,SCRIPT,EXPRESSION,MRI>":"		{ RTOKEN(':'); }
<BOTH,SCRIPT,EXPRESSION,MRI>";"		{ RTOKEN(';');}
<BOTH,SCRIPT>"MEMORY"		{ RTOKEN(MEMORY);}
<BOTH,SCRIPT>"ORIGIN"		{ RTOKEN(ORIGIN);}
<BOTH,SCRIPT>"VERSION"		{ RTOKEN(VERSIONK);}
<EXPRESSION,BOTH,SCRIPT>"BLOCK"		{ RTOKEN(BLOCK);}
<EXPRESSION,BOTH,SCRIPT>"BIND"		{ RTOKEN(BIND);}
<BOTH,SCRIPT>"LENGTH"		{ RTOKEN(LENGTH);}
<EXPRESSION,BOTH,SCRIPT>"ALIGN"			{ RTOKEN(ALIGN_K);}
<EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_ALIGN"	{ RTOKEN(DATA_SEGMENT_ALIGN);}
<EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_END"	{ RTOKEN(DATA_SEGMENT_END);}
<EXPRESSION,BOTH,SCRIPT>"ADDR"			{ RTOKEN(ADDR);}
<EXPRESSION,BOTH,SCRIPT>"LOADADDR"		{ RTOKEN(LOADADDR);}
<EXPRESSION,BOTH>"MAX"			{ RTOKEN(MAX_K); }
<EXPRESSION,BOTH>"MIN"			{ RTOKEN(MIN_K); }
<EXPRESSION,BOTH>"ASSERT"		{ RTOKEN(ASSERT_K); }
<BOTH,SCRIPT>"ENTRY"			{ RTOKEN(ENTRY);}
<BOTH,SCRIPT,MRI>"EXTERN"		{ RTOKEN(EXTERN);}
<EXPRESSION,BOTH,SCRIPT>"NEXT"			{ RTOKEN(NEXT);}
<EXPRESSION,BOTH,SCRIPT>"sizeof_headers"	{ RTOKEN(SIZEOF_HEADERS);}
<EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS"	{ RTOKEN(SIZEOF_HEADERS);}
<BOTH,SCRIPT>"MAP"			{ RTOKEN(MAP);}
<EXPRESSION,BOTH,SCRIPT>"SIZEOF"		{ RTOKEN(SIZEOF);}
<BOTH,SCRIPT>"TARGET"		{ RTOKEN(TARGET_K);}
<BOTH,SCRIPT>"SEARCH_DIR"		{ RTOKEN(SEARCH_DIR);}
<BOTH,SCRIPT>"OUTPUT"		{ RTOKEN(OUTPUT);}
<BOTH,SCRIPT>"INPUT"			{ RTOKEN(INPUT);}
<EXPRESSION,BOTH,SCRIPT>"GROUP"		{ RTOKEN(GROUP);}
<EXPRESSION,BOTH,SCRIPT>"DEFINED"		{ RTOKEN(DEFINED);}
<BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS"	{ RTOKEN(CREATE_OBJECT_SYMBOLS);}
<BOTH,SCRIPT>"CONSTRUCTORS"		{ RTOKEN( CONSTRUCTORS);}
<BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION" { RTOKEN(FORCE_COMMON_ALLOCATION);}
<BOTH,SCRIPT>"INHIBIT_COMMON_ALLOCATION" { RTOKEN(INHIBIT_COMMON_ALLOCATION);}
<BOTH,SCRIPT>"SECTIONS"		{ RTOKEN(SECTIONS);}
<BOTH,SCRIPT>"FILL"			{ RTOKEN(FILL);}
<BOTH,SCRIPT>"STARTUP"		{ RTOKEN(STARTUP);}
<BOTH,SCRIPT>"OUTPUT_FORMAT"		{ RTOKEN(OUTPUT_FORMAT);}
<BOTH,SCRIPT>"OUTPUT_ARCH"		{ RTOKEN( OUTPUT_ARCH);}
<BOTH,SCRIPT>"HLL"			{ RTOKEN(HLL);}
<BOTH,SCRIPT>"SYSLIB"		{ RTOKEN(SYSLIB);}
<BOTH,SCRIPT>"FLOAT"			{ RTOKEN(FLOAT);}
<BOTH,SCRIPT>"QUAD"			{ RTOKEN( QUAD);}
<BOTH,SCRIPT>"SQUAD"			{ RTOKEN( SQUAD);}
<BOTH,SCRIPT>"LONG"			{ RTOKEN( LONG);}
<BOTH,SCRIPT>"SHORT"			{ RTOKEN( SHORT);}
<BOTH,SCRIPT>"BYTE"			{ RTOKEN( BYTE);}
<BOTH,SCRIPT>"NOFLOAT"		{ RTOKEN(NOFLOAT);}
<EXPRESSION,BOTH,SCRIPT>"NOCROSSREFS"	{ RTOKEN(NOCROSSREFS);}
<BOTH,SCRIPT>"OVERLAY"			{ RTOKEN(OVERLAY); }
<BOTH,SCRIPT>"SORT"			{ RTOKEN(SORT); }
<EXPRESSION,BOTH,SCRIPT>"NOLOAD"	{ RTOKEN(NOLOAD);}
<EXPRESSION,BOTH,SCRIPT>"DSECT"		{ RTOKEN(DSECT);}
<EXPRESSION,BOTH,SCRIPT>"COPY"		{ RTOKEN(COPY);}
<EXPRESSION,BOTH,SCRIPT>"INFO"		{ RTOKEN(INFO);}
<EXPRESSION,BOTH,SCRIPT>"OVERLAY"	{ RTOKEN(OVERLAY);}
<BOTH,SCRIPT>"o"			{ RTOKEN(ORIGIN);}
<BOTH,SCRIPT>"org"			{ RTOKEN(ORIGIN);}
<BOTH,SCRIPT>"l"			{ RTOKEN( LENGTH);}
<BOTH,SCRIPT>"len"			{ RTOKEN( LENGTH);}
<BOTH,SCRIPT>"INCLUDE"			{ RTOKEN(INCLUDE);}
<BOTH,SCRIPT>"PHDRS"			{ RTOKEN (PHDRS); }
<EXPRESSION,BOTH,SCRIPT>"AT"			{ RTOKEN(AT);}
<EXPRESSION,BOTH,SCRIPT>"PROVIDE"		{ RTOKEN(PROVIDE); }
<EXPRESSION,BOTH,SCRIPT>"KEEP"		{ RTOKEN(KEEP); }
<EXPRESSION,BOTH,SCRIPT>"EXCLUDE_FILE"        { RTOKEN(EXCLUDE_FILE); }
<MRI>"#".*\n?			{ ++ lineno; }
<MRI>"\n"	                { ++ lineno;  RTOKEN(NEWLINE); }
<MRI>"*".*			{ /* Mri comment line */ }
<MRI>";".*			{ /* Mri comment line */ }
<MRI>"END"                      { RTOKEN(ENDWORD); }
<MRI>"ALIGNMOD"		{ RTOKEN(ALIGNMOD);}
<MRI>"ALIGN"		{ RTOKEN(ALIGN_K);}
<MRI>"CHIP"                     { RTOKEN(CHIP); }
<MRI>"BASE"                     { RTOKEN(BASE); }
<MRI>"ALIAS"                     { RTOKEN(ALIAS); }
<MRI>"TRUNCATE"                     { RTOKEN(TRUNCATE); }
<MRI>"LOAD"                     { RTOKEN(LOAD); }
<MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
<MRI>"ORDER"                    { RTOKEN(ORDER); }
<MRI>"NAME"                     { RTOKEN(NAMEWORD); }
<MRI>"FORMAT"                   { RTOKEN(FORMAT); }
<MRI>"CASE"                     { RTOKEN(CASE); }
<MRI>"START"                    { RTOKEN(START); }
<MRI>"LIST".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
<MRI>"SECT"			{ RTOKEN(SECT); }
<EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE"			{ RTOKEN(ABSOLUTE); }
<MRI>"end"                      { RTOKEN(ENDWORD); }
<MRI>"alignmod"		{ RTOKEN(ALIGNMOD);}
<MRI>"align"		{ RTOKEN(ALIGN_K);}
<MRI>"chip"                     { RTOKEN(CHIP); }
<MRI>"base"                     { RTOKEN(BASE); }
<MRI>"alias"                     { RTOKEN(ALIAS); }
<MRI>"truncate"                     { RTOKEN(TRUNCATE); }
<MRI>"load"                     { RTOKEN(LOAD); }
<MRI>"public"                   { RTOKEN(PUBLIC); }
<MRI>"order"                    { RTOKEN(ORDER); }
<MRI>"name"                     { RTOKEN(NAMEWORD); }
<MRI>"format"                   { RTOKEN(FORMAT); }
<MRI>"case"                     { RTOKEN(CASE); }
<MRI>"extern"                   { RTOKEN(EXTERN); }
<MRI>"start"                    { RTOKEN(START); }
<MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
<MRI>"sect"			{ RTOKEN(SECT); }
<EXPRESSION,BOTH,SCRIPT,MRI>"absolute"			{ RTOKEN(ABSOLUTE); }

<MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*	{
/* Filename without commas, needed to parse mri stuff */
				 yylval.name = xstrdup(yytext); 
				  return NAME;
				}


<BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}*	{
				 yylval.name = xstrdup(yytext); 
				  return NAME;
				}
<BOTH,EXPRESSION>"-l"{FILENAMECHAR}+ {
				  yylval.name = xstrdup (yytext + 2);
				  return LNAME;
				}
<SCRIPT>{WILDCHAR}* {
		/* Annoyingly, this pattern can match comments, and we have
		   longest match issues to consider.  So if the first two
		   characters are a comment opening, put the input back and
		   try again.  */
		if (yytext[0] == '/' && yytext[1] == '*')
		  {
		    yyless(2);
		    comment ();
		  }
		else
		  {
		    yylval.name = xstrdup(yytext);
		    return NAME;
		  }
	}

<EXPRESSION,BOTH,SCRIPT,VERS_NODE>"\""[^\"]*"\"" {
					/* No matter the state, quotes
					   give what's inside */
					yylval.name = xstrdup(yytext+1);
					yylval.name[yyleng-2] = 0;
					return NAME;
				}
<BOTH,SCRIPT,EXPRESSION>"\n"		{ lineno++;}
<MRI,BOTH,SCRIPT,EXPRESSION>[ \t\r]+	{ }

<VERS_NODE,VERS_SCRIPT>[:,;]	{ return *yytext; }

<VERS_NODE>global		{ RTOKEN(GLOBAL); }

<VERS_NODE>local		{ RTOKEN(LOCAL); }

<VERS_NODE>extern		{ RTOKEN(EXTERN); }

<VERS_NODE>{V_IDENTIFIER}	{ yylval.name = xstrdup (yytext);
				  return VERS_IDENTIFIER; }

<VERS_SCRIPT>{V_TAG}		{ yylval.name = xstrdup (yytext);
				  return VERS_TAG; }

<VERS_START>"{"			{ BEGIN(VERS_SCRIPT); return *yytext; }

<VERS_SCRIPT>"{"		{ BEGIN(VERS_NODE); 
				  vers_node_nesting = 0;
				  return *yytext;
				}
<VERS_SCRIPT>"}"		{ return *yytext; }
<VERS_NODE>"{"			{ vers_node_nesting++; return *yytext; }
<VERS_NODE>"}"			{ if (--vers_node_nesting < 0)
				    BEGIN(VERS_SCRIPT);
				  return *yytext;
				}

<VERS_START,VERS_NODE,VERS_SCRIPT>[\n]		{ lineno++; }

<VERS_START,VERS_NODE,VERS_SCRIPT>#.*		{ /* Eat up comments */ }

<VERS_START,VERS_NODE,VERS_SCRIPT>[ \t\r]+   	{ /* Eat up whitespace */ }

<<EOF>> {
  include_stack_ptr--;
    
  if (include_stack_ptr == 0) 
  {
    yyterminate();
  }
  else 
  {
    yy_switch_to_buffer(include_stack[include_stack_ptr]);
  }

  ldfile_input_filename = file_name_stack[include_stack_ptr - 1];
  lineno = lineno_stack[include_stack_ptr];

  return END;
}

<SCRIPT,MRI,VERS_START,VERS_SCRIPT,VERS_NODE>.	lex_warn_invalid(" in script", yytext);
<EXPRESSION,DEFSYMEXP,BOTH>.	lex_warn_invalid(" in expression", yytext);
    
%%


/* Switch flex to reading script file NAME, open on FILE,
   saving the current input info on the include stack.  */

void
lex_push_file (file, name)
     FILE *file;
     const char *name;
{
  if (include_stack_ptr >= MAX_INCLUDE_DEPTH) 
    {
      einfo("%F:includes nested too deeply\n");
    }
  file_name_stack[include_stack_ptr] = name;
  lineno_stack[include_stack_ptr] = lineno;
  include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;

  include_stack_ptr++;
  lineno = 1;
  yyin = file;
  yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
}

/* Return a newly created flex input buffer containing STRING,
   which is SIZE bytes long.  */

static YY_BUFFER_STATE 
yy_create_string_buffer (string, size)
     CONST char *string;
     size_t size;
{
  YY_BUFFER_STATE b;

  /* Calls to m-alloc get turned by sed into xm-alloc.  */
  b = (YY_BUFFER_STATE) malloc (sizeof (struct yy_buffer_state));
  b->yy_input_file = 0;
  b->yy_buf_size = size;

  /* yy_ch_buf has to be 2 characters longer than the size given because
     we need to put in 2 end-of-buffer characters.  */
  b->yy_ch_buf = (char *) malloc ((unsigned) (b->yy_buf_size + 3));

  b->yy_ch_buf[0] = '\n';
  strcpy (b->yy_ch_buf+1, string);
  b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
  b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
  b->yy_n_chars = size+1;
  b->yy_buf_pos = &b->yy_ch_buf[1];

  b->yy_is_our_buffer = 1;
  b->yy_is_interactive = 0;
  b->yy_at_bol = 1;
  b->yy_fill_buffer = 0;

  /* flex 2.4.7 changed the interface.  FIXME: We should not be using
     a flex internal interface in the first place!  */
#ifdef YY_BUFFER_NEW
  b->yy_buffer_status = YY_BUFFER_NEW;
#else
  b->yy_eof_status = EOF_NOT_SEEN;
#endif

  return b;
}

/* Switch flex to reading from STRING, saving the current input info
   on the include stack.  */

void
lex_redirect (string)
     CONST char *string;
{
  YY_BUFFER_STATE tmp;

  yy_init = 0;
  if (include_stack_ptr >= MAX_INCLUDE_DEPTH) 
    {
      einfo("%F: macros nested too deeply\n");
    }
  file_name_stack[include_stack_ptr] = "redirect";
  lineno_stack[include_stack_ptr] = lineno;
  include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
  include_stack_ptr++;
  lineno = 1;
  tmp = yy_create_string_buffer (string, strlen (string));
  yy_switch_to_buffer (tmp);
}

/* Functions to switch to a different flex start condition,
   saving the current start condition on `state_stack'.  */

static int state_stack[MAX_INCLUDE_DEPTH * 2];
static int *state_stack_p = state_stack;

void
ldlex_script ()
{
  *(state_stack_p)++ = yy_start;
  BEGIN (SCRIPT);
}

void
ldlex_mri_script ()
{
  *(state_stack_p)++ = yy_start;
  BEGIN (MRI);
}

void
ldlex_version_script ()
{
  *(state_stack_p)++ = yy_start;
  BEGIN (VERS_START);
}

void
ldlex_version_file ()
{
  *(state_stack_p)++ = yy_start;
  BEGIN (VERS_SCRIPT);
}

void
ldlex_defsym ()
{
  *(state_stack_p)++ = yy_start;
  BEGIN (DEFSYMEXP);
}
	   
void
ldlex_expression ()
{
  *(state_stack_p)++ = yy_start;
  BEGIN (EXPRESSION);
}

void
ldlex_both ()
{
  *(state_stack_p)++ = yy_start;
  BEGIN (BOTH);
}

void
ldlex_popstate ()
{
  yy_start = *(--state_stack_p);
}


/* Place up to MAX_SIZE characters in BUF and return in *RESULT
   either the number of characters read, or 0 to indicate EOF.  */

static void
yy_input (buf, result, max_size)
     char *buf;
     int *result;
     int max_size;
{
  *result = 0; 
  if (yy_current_buffer->yy_input_file)
    {
      if (yyin)
	{
	  *result = fread ((char *) buf, 1, max_size, yyin);
	  if (*result < max_size && ferror (yyin)) 
	    einfo ("%F%P: read in flex scanner failed\n");
	}
    }
}

/* Eat the rest of a C-style comment.  */

static void
comment ()
{
  int c;

  while (1)
  {
    c = input();
    while (c != '*' && c != EOF) 
    {
      if (c == '\n')
	lineno++;
      c = input();
    }

    if (c == '*')
    {
      c = input();
      while (c == '*')
       c = input();
      if (c == '/')
       break;			/* found the end */
    }

    if (c == '\n')
      lineno++;

    if (c == EOF)
    {
      einfo( "%F%P: EOF in comment\n");
      break;
    }
  }
}

/* Warn the user about a garbage character WHAT in the input
   in context WHERE.  */

static void
lex_warn_invalid (where, what)
     char *where, *what;
{
  char buf[5];

  /* If we have found an input file whose format we do not recognize,
     and we are therefore treating it as a linker script, and we find
     an invalid character, then most likely this is a real object file
     of some different format.  Treat it as such.  */
  if (ldfile_assumed_script)
    {
      bfd_set_error (bfd_error_file_not_recognized);
      einfo ("%F%s: file not recognized: %E\n", ldfile_input_filename);
    }

  if (! ISPRINT (*what))
    {
      sprintf (buf, "\\%03o", (unsigned int) *what);
      what = buf;
    }

  einfo ("%P:%S: ignoring invalid character `%s'%s\n", what, where);
}