1 %{
2
3 /* Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
5
6 This file is part of GLD, the Gnu Linker.
7
8 GLD is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
12
13 GLD is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GLD; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 /*
24 This was written by steve chamberlain
25 sac@cygnus.com
26 */
27
28
29 #include <stdio.h>
30
31 #include "bfd.h"
32 #include "sysdep.h"
33 #include "safe-ctype.h"
34 #include "bfdlink.h"
35 #include "ld.h"
36 #include "ldmisc.h"
37 #include "ldexp.h"
38 #include "ldlang.h"
39 #include <ldgram.h>
40 #include "ldfile.h"
41 #include "ldlex.h"
42 #include "ldmain.h"
43 #include "libiberty.h"
44
45 /* The type of top-level parser input.
46 yylex and yyparse (indirectly) both check this. */
47 input_type parser_input;
48
49 /* Line number in the current input file.
50 (FIXME Actually, it doesn't appear to get reset for each file?) */
51 unsigned int lineno = 1;
52
53 /* The string we are currently lexing, or NULL if we are reading a
54 file. */
55 const char *lex_string = NULL;
56
57 /* Support for flex reading from more than one input file (stream).
58 `include_stack' is flex's input state for each open file;
59 `file_name_stack' is the file names. `lineno_stack' is the current
60 line numbers.
61
62 If `include_stack_ptr' is 0, we haven't started reading anything yet.
63 Otherwise, stack elements 0 through `include_stack_ptr - 1' are valid. */
64
65 #undef YY_INPUT
66 #define YY_INPUT(buf,result,max_size) yy_input (buf, &result, max_size)
67
68 #define YY_NO_UNPUT
69
70 #define MAX_INCLUDE_DEPTH 10
71 static YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
72 static const char *file_name_stack[MAX_INCLUDE_DEPTH];
73 static unsigned int lineno_stack[MAX_INCLUDE_DEPTH];
74 static unsigned int include_stack_ptr = 0;
75 static int vers_node_nesting = 0;
76
77 static void yy_input (char *, int *, int);
78 static void comment (void);
79 static void lex_warn_invalid (char *where, char *what);
80
81 /* STATES
82 EXPRESSION definitely in an expression
83 SCRIPT definitely in a script
84 BOTH either EXPRESSION or SCRIPT
85 DEFSYMEXP in an argument to -defsym
86 MRI in an MRI script
87 VERS_START starting a Sun style mapfile
88 VERS_SCRIPT a Sun style mapfile
89 VERS_NODE a node within a Sun style mapfile
90 */
91 #define RTOKEN(x) { yylval.token = x; return x; }
92
93 /* Some versions of flex want this. */
94 #ifndef yywrap
yywrap(void)95 int yywrap (void) { return 1; }
96 #endif
97 %}
98
99 %a 4000
100 %o 5000
101
102 CMDFILENAMECHAR [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
103 CMDFILENAMECHAR1 [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
104 FILENAMECHAR1 [_a-zA-Z\/\.\\\$\_\~]
105 SYMBOLCHARN [_a-zA-Z\/\.\\\$\_\~0-9]
106 FILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
107 WILDCHAR [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~\?\*]
108 WHITE [ \t\n\r]+
109
110 NOCFILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
111
112 V_TAG [.$_a-zA-Z][._a-zA-Z0-9]*
113 V_IDENTIFIER [*?.$_a-zA-Z\[\]\-\!\^\\]([*?.$_a-zA-Z0-9\[\]\-\!\^\\]|::)*
114
115 %s SCRIPT
116 %s EXPRESSION
117 %s BOTH
118 %s DEFSYMEXP
119 %s MRI
120 %s VERS_START
121 %s VERS_SCRIPT
122 %s VERS_NODE
123 %%
124
125 if (parser_input != input_selected)
126 {
127 /* The first token of the input determines the initial parser state. */
128 input_type t = parser_input;
129 parser_input = input_selected;
130 switch (t)
131 {
132 case input_script: return INPUT_SCRIPT; break;
133 case input_mri_script: return INPUT_MRI_SCRIPT; break;
134 case input_version_script: return INPUT_VERSION_SCRIPT; break;
135 case input_defsym: return INPUT_DEFSYM; break;
136 default: abort ();
137 }
138 }
139
140 <BOTH,SCRIPT,EXPRESSION,VERS_START,VERS_NODE,VERS_SCRIPT>"/*" { comment (); }
141
142
143 <DEFSYMEXP>"-" { RTOKEN('-');}
144 <DEFSYMEXP>"+" { RTOKEN('+');}
145 <DEFSYMEXP>{FILENAMECHAR1}{SYMBOLCHARN}* { yylval.name = xstrdup (yytext); return NAME; }
146 <DEFSYMEXP>"=" { RTOKEN('='); }
147
148 <MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
149 yylval.integer = bfd_scan_vma (yytext + 1, 0, 16);
150 yylval.bigint.str = NULL;
151 return INT;
152 }
153
154 <MRI,EXPRESSION>([0-9A-Fa-f])+(H|h|X|x|B|b|O|o|D|d) {
155 int ibase ;
156 switch (yytext[yyleng - 1]) {
157 case 'X':
158 case 'x':
159 case 'H':
160 case 'h':
161 ibase = 16;
162 break;
163 case 'O':
164 case 'o':
165 ibase = 8;
166 break;
167 case 'B':
168 case 'b':
169 ibase = 2;
170 break;
171 default:
172 ibase = 10;
173 }
174 yylval.integer = bfd_scan_vma (yytext, 0,
175 ibase);
176 yylval.bigint.str = NULL;
177 return INT;
178 }
179 <SCRIPT,DEFSYMEXP,MRI,BOTH,EXPRESSION>((("$"|0[xX])([0-9A-Fa-f])+)|(([0-9])+))(M|K|m|k)? {
180 char *s = yytext;
181 int ibase = 0;
182
183 if (*s == '$')
184 {
185 ++s;
186 ibase = 16;
187 }
188 yylval.integer = bfd_scan_vma (s, 0, ibase);
189 yylval.bigint.str = NULL;
190 if (yytext[yyleng - 1] == 'M'
191 || yytext[yyleng - 1] == 'm')
192 {
193 yylval.integer *= 1024 * 1024;
194 }
195 else if (yytext[yyleng - 1] == 'K'
196 || yytext[yyleng - 1]=='k')
197 {
198 yylval.integer *= 1024;
199 }
200 else if (yytext[0] == '0'
201 && (yytext[1] == 'x'
202 || yytext[1] == 'X'))
203 {
204 yylval.bigint.str = xstrdup (yytext + 2);
205 }
206 return INT;
207 }
208 <BOTH,SCRIPT,EXPRESSION,MRI>"]" { RTOKEN(']');}
209 <BOTH,SCRIPT,EXPRESSION,MRI>"[" { RTOKEN('[');}
210 <BOTH,SCRIPT,EXPRESSION,MRI>"<<=" { RTOKEN(LSHIFTEQ);}
211 <BOTH,SCRIPT,EXPRESSION,MRI>">>=" { RTOKEN(RSHIFTEQ);}
212 <BOTH,SCRIPT,EXPRESSION,MRI>"||" { RTOKEN(OROR);}
213 <BOTH,SCRIPT,EXPRESSION,MRI>"==" { RTOKEN(EQ);}
214 <BOTH,SCRIPT,EXPRESSION,MRI>"!=" { RTOKEN(NE);}
215 <BOTH,SCRIPT,EXPRESSION,MRI>">=" { RTOKEN(GE);}
216 <BOTH,SCRIPT,EXPRESSION,MRI>"<=" { RTOKEN(LE);}
217 <BOTH,SCRIPT,EXPRESSION,MRI>"<<" { RTOKEN(LSHIFT);}
218 <BOTH,SCRIPT,EXPRESSION,MRI>">>" { RTOKEN(RSHIFT);}
219 <BOTH,SCRIPT,EXPRESSION,MRI>"+=" { RTOKEN(PLUSEQ);}
220 <BOTH,SCRIPT,EXPRESSION,MRI>"-=" { RTOKEN(MINUSEQ);}
221 <BOTH,SCRIPT,EXPRESSION,MRI>"*=" { RTOKEN(MULTEQ);}
222 <BOTH,SCRIPT,EXPRESSION,MRI>"/=" { RTOKEN(DIVEQ);}
223 <BOTH,SCRIPT,EXPRESSION,MRI>"&=" { RTOKEN(ANDEQ);}
224 <BOTH,SCRIPT,EXPRESSION,MRI>"|=" { RTOKEN(OREQ);}
225 <BOTH,SCRIPT,EXPRESSION,MRI>"&&" { RTOKEN(ANDAND);}
226 <BOTH,SCRIPT,EXPRESSION,MRI>">" { RTOKEN('>');}
227 <BOTH,SCRIPT,EXPRESSION,MRI>"," { RTOKEN(',');}
228 <BOTH,SCRIPT,EXPRESSION,MRI>"&" { RTOKEN('&');}
229 <BOTH,SCRIPT,EXPRESSION,MRI>"|" { RTOKEN('|');}
230 <BOTH,SCRIPT,EXPRESSION,MRI>"~" { RTOKEN('~');}
231 <BOTH,SCRIPT,EXPRESSION,MRI>"!" { RTOKEN('!');}
232 <BOTH,SCRIPT,EXPRESSION,MRI>"?" { RTOKEN('?');}
233 <BOTH,SCRIPT,EXPRESSION,MRI>"*" { RTOKEN('*');}
234 <BOTH,SCRIPT,EXPRESSION,MRI>"+" { RTOKEN('+');}
235 <BOTH,SCRIPT,EXPRESSION,MRI>"-" { RTOKEN('-');}
236 <BOTH,SCRIPT,EXPRESSION,MRI>"/" { RTOKEN('/');}
237 <BOTH,SCRIPT,EXPRESSION,MRI>"%" { RTOKEN('%');}
238 <BOTH,SCRIPT,EXPRESSION,MRI>"<" { RTOKEN('<');}
239 <BOTH,SCRIPT,EXPRESSION,MRI>"=" { RTOKEN('=');}
240 <BOTH,SCRIPT,EXPRESSION,MRI>"}" { RTOKEN('}') ; }
241 <BOTH,SCRIPT,EXPRESSION,MRI>"{" { RTOKEN('{'); }
242 <BOTH,SCRIPT,EXPRESSION,MRI>")" { RTOKEN(')');}
243 <BOTH,SCRIPT,EXPRESSION,MRI>"(" { RTOKEN('(');}
244 <BOTH,SCRIPT,EXPRESSION,MRI>":" { RTOKEN(':'); }
245 <BOTH,SCRIPT,EXPRESSION,MRI>";" { RTOKEN(';');}
246 <BOTH,SCRIPT>"MEMORY" { RTOKEN(MEMORY);}
247 <BOTH,SCRIPT,EXPRESSION>"ORIGIN" { RTOKEN(ORIGIN);}
248 <BOTH,SCRIPT>"VERSION" { RTOKEN(VERSIONK);}
249 <EXPRESSION,BOTH,SCRIPT>"BLOCK" { RTOKEN(BLOCK);}
250 <EXPRESSION,BOTH,SCRIPT>"BIND" { RTOKEN(BIND);}
251 <BOTH,SCRIPT,EXPRESSION>"LENGTH" { RTOKEN(LENGTH);}
252 <EXPRESSION,BOTH,SCRIPT>"ALIGN" { RTOKEN(ALIGN_K);}
253 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_ALIGN" { RTOKEN(DATA_SEGMENT_ALIGN);}
254 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_RELRO_END" { RTOKEN(DATA_SEGMENT_RELRO_END);}
255 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_END" { RTOKEN(DATA_SEGMENT_END);}
256 <EXPRESSION,BOTH,SCRIPT>"ADDR" { RTOKEN(ADDR);}
257 <EXPRESSION,BOTH,SCRIPT>"LOADADDR" { RTOKEN(LOADADDR);}
258 <EXPRESSION,BOTH>"MAX" { RTOKEN(MAX_K); }
259 <EXPRESSION,BOTH>"MIN" { RTOKEN(MIN_K); }
260 <EXPRESSION,BOTH>"ASSERT" { RTOKEN(ASSERT_K); }
261 <BOTH,SCRIPT>"ENTRY" { RTOKEN(ENTRY);}
262 <BOTH,SCRIPT,MRI>"EXTERN" { RTOKEN(EXTERN);}
263 <EXPRESSION,BOTH,SCRIPT>"NEXT" { RTOKEN(NEXT);}
264 <EXPRESSION,BOTH,SCRIPT>"sizeof_headers" { RTOKEN(SIZEOF_HEADERS);}
265 <EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS" { RTOKEN(SIZEOF_HEADERS);}
266 <EXPRESSION,BOTH,SCRIPT>"SEGMENT_START" { RTOKEN(SEGMENT_START);}
267 <BOTH,SCRIPT>"MAP" { RTOKEN(MAP);}
268 <EXPRESSION,BOTH,SCRIPT>"SIZEOF" { RTOKEN(SIZEOF);}
269 <BOTH,SCRIPT>"TARGET" { RTOKEN(TARGET_K);}
270 <BOTH,SCRIPT>"SEARCH_DIR" { RTOKEN(SEARCH_DIR);}
271 <BOTH,SCRIPT>"OUTPUT" { RTOKEN(OUTPUT);}
272 <BOTH,SCRIPT>"INPUT" { RTOKEN(INPUT);}
273 <EXPRESSION,BOTH,SCRIPT>"GROUP" { RTOKEN(GROUP);}
274 <EXPRESSION,BOTH,SCRIPT>"AS_NEEDED" { RTOKEN(AS_NEEDED);}
275 <EXPRESSION,BOTH,SCRIPT>"DEFINED" { RTOKEN(DEFINED);}
276 <BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS" { RTOKEN(CREATE_OBJECT_SYMBOLS);}
277 <BOTH,SCRIPT>"CONSTRUCTORS" { RTOKEN( CONSTRUCTORS);}
278 <BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION" { RTOKEN(FORCE_COMMON_ALLOCATION);}
279 <BOTH,SCRIPT>"INHIBIT_COMMON_ALLOCATION" { RTOKEN(INHIBIT_COMMON_ALLOCATION);}
280 <BOTH,SCRIPT>"SECTIONS" { RTOKEN(SECTIONS);}
281 <BOTH,SCRIPT>"FILL" { RTOKEN(FILL);}
282 <BOTH,SCRIPT>"STARTUP" { RTOKEN(STARTUP);}
283 <BOTH,SCRIPT>"OUTPUT_FORMAT" { RTOKEN(OUTPUT_FORMAT);}
284 <BOTH,SCRIPT>"OUTPUT_ARCH" { RTOKEN( OUTPUT_ARCH);}
285 <BOTH,SCRIPT>"HLL" { RTOKEN(HLL);}
286 <BOTH,SCRIPT>"SYSLIB" { RTOKEN(SYSLIB);}
287 <BOTH,SCRIPT>"FLOAT" { RTOKEN(FLOAT);}
288 <BOTH,SCRIPT>"QUAD" { RTOKEN( QUAD);}
289 <BOTH,SCRIPT>"SQUAD" { RTOKEN( SQUAD);}
290 <BOTH,SCRIPT>"LONG" { RTOKEN( LONG);}
291 <BOTH,SCRIPT>"SHORT" { RTOKEN( SHORT);}
292 <BOTH,SCRIPT>"BYTE" { RTOKEN( BYTE);}
293 <BOTH,SCRIPT>"NOFLOAT" { RTOKEN(NOFLOAT);}
294 <EXPRESSION,BOTH,SCRIPT>"NOCROSSREFS" { RTOKEN(NOCROSSREFS);}
295 <BOTH,SCRIPT>"OVERLAY" { RTOKEN(OVERLAY); }
296 <BOTH,SCRIPT>"SORT_BY_NAME" { RTOKEN(SORT_BY_NAME); }
297 <BOTH,SCRIPT>"SORT_BY_ALIGNMENT" { RTOKEN(SORT_BY_ALIGNMENT); }
298 <BOTH,SCRIPT>"SORT" { RTOKEN(SORT_BY_NAME); }
299 <EXPRESSION,BOTH,SCRIPT>"NOLOAD" { RTOKEN(NOLOAD);}
300 <EXPRESSION,BOTH,SCRIPT>"DSECT" { RTOKEN(DSECT);}
301 <EXPRESSION,BOTH,SCRIPT>"COPY" { RTOKEN(COPY);}
302 <EXPRESSION,BOTH,SCRIPT>"INFO" { RTOKEN(INFO);}
303 <EXPRESSION,BOTH,SCRIPT>"OVERLAY" { RTOKEN(OVERLAY);}
304 <EXPRESSION,BOTH,SCRIPT>"ONLY_IF_RO" { RTOKEN(ONLY_IF_RO); }
305 <EXPRESSION,BOTH,SCRIPT>"ONLY_IF_RW" { RTOKEN(ONLY_IF_RW); }
306 <EXPRESSION,BOTH,SCRIPT>"SPECIAL" { RTOKEN(SPECIAL); }
307 <BOTH,SCRIPT>"o" { RTOKEN(ORIGIN);}
308 <BOTH,SCRIPT>"org" { RTOKEN(ORIGIN);}
309 <BOTH,SCRIPT>"l" { RTOKEN( LENGTH);}
310 <BOTH,SCRIPT>"len" { RTOKEN( LENGTH);}
311 <BOTH,SCRIPT>"INCLUDE" { RTOKEN(INCLUDE);}
312 <BOTH,SCRIPT>"PHDRS" { RTOKEN (PHDRS); }
313 <EXPRESSION,BOTH,SCRIPT>"AT" { RTOKEN(AT);}
314 <EXPRESSION,BOTH,SCRIPT>"SUBALIGN" { RTOKEN(SUBALIGN);}
315 <EXPRESSION,BOTH,SCRIPT>"PROVIDE" { RTOKEN(PROVIDE); }
316 <EXPRESSION,BOTH,SCRIPT>"KEEP" { RTOKEN(KEEP); }
317 <EXPRESSION,BOTH,SCRIPT>"EXCLUDE_FILE" { RTOKEN(EXCLUDE_FILE); }
318 <MRI>"#".*\n? { ++ lineno; }
319 <MRI>"\n" { ++ lineno; RTOKEN(NEWLINE); }
320 <MRI>"*".* { /* Mri comment line */ }
321 <MRI>";".* { /* Mri comment line */ }
322 <MRI>"END" { RTOKEN(ENDWORD); }
323 <MRI>"ALIGNMOD" { RTOKEN(ALIGNMOD);}
324 <MRI>"ALIGN" { RTOKEN(ALIGN_K);}
325 <MRI>"CHIP" { RTOKEN(CHIP); }
326 <MRI>"BASE" { RTOKEN(BASE); }
327 <MRI>"ALIAS" { RTOKEN(ALIAS); }
328 <MRI>"TRUNCATE" { RTOKEN(TRUNCATE); }
329 <MRI>"LOAD" { RTOKEN(LOAD); }
330 <MRI>"PUBLIC" { RTOKEN(PUBLIC); }
331 <MRI>"ORDER" { RTOKEN(ORDER); }
332 <MRI>"NAME" { RTOKEN(NAMEWORD); }
333 <MRI>"FORMAT" { RTOKEN(FORMAT); }
334 <MRI>"CASE" { RTOKEN(CASE); }
335 <MRI>"START" { RTOKEN(START); }
336 <MRI>"LIST".* { RTOKEN(LIST); /* LIST and ignore to end of line */ }
337 <MRI>"SECT" { RTOKEN(SECT); }
338 <EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE" { RTOKEN(ABSOLUTE); }
339 <MRI>"end" { RTOKEN(ENDWORD); }
340 <MRI>"alignmod" { RTOKEN(ALIGNMOD);}
341 <MRI>"align" { RTOKEN(ALIGN_K);}
342 <MRI>"chip" { RTOKEN(CHIP); }
343 <MRI>"base" { RTOKEN(BASE); }
344 <MRI>"alias" { RTOKEN(ALIAS); }
345 <MRI>"truncate" { RTOKEN(TRUNCATE); }
346 <MRI>"load" { RTOKEN(LOAD); }
347 <MRI>"public" { RTOKEN(PUBLIC); }
348 <MRI>"order" { RTOKEN(ORDER); }
349 <MRI>"name" { RTOKEN(NAMEWORD); }
350 <MRI>"format" { RTOKEN(FORMAT); }
351 <MRI>"case" { RTOKEN(CASE); }
352 <MRI>"extern" { RTOKEN(EXTERN); }
353 <MRI>"start" { RTOKEN(START); }
354 <MRI>"list".* { RTOKEN(LIST); /* LIST and ignore to end of line */ }
355 <MRI>"sect" { RTOKEN(SECT); }
356 <EXPRESSION,BOTH,SCRIPT,MRI>"absolute" { RTOKEN(ABSOLUTE); }
357
358 <MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}* {
359 /* Filename without commas, needed to parse mri stuff */
360 yylval.name = xstrdup (yytext);
361 return NAME;
362 }
363
364
365 <BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}* {
366 yylval.name = xstrdup (yytext);
367 return NAME;
368 }
369 <BOTH,EXPRESSION>"-l"{FILENAMECHAR}+ {
370 yylval.name = xstrdup (yytext + 2);
371 return LNAME;
372 }
373 <SCRIPT>{WILDCHAR}* {
374 /* Annoyingly, this pattern can match comments, and we have
375 longest match issues to consider. So if the first two
376 characters are a comment opening, put the input back and
377 try again. */
378 if (yytext[0] == '/' && yytext[1] == '*')
379 {
380 yyless (2);
381 comment ();
382 }
383 else
384 {
385 yylval.name = xstrdup (yytext);
386 return NAME;
387 }
388 }
389
390 <EXPRESSION,BOTH,SCRIPT,VERS_NODE>"\""[^\"]*"\"" {
391 /* No matter the state, quotes
392 give what's inside */
393 yylval.name = xstrdup (yytext + 1);
394 yylval.name[yyleng - 2] = 0;
395 return NAME;
396 }
397 <BOTH,SCRIPT,EXPRESSION>"\n" { lineno++;}
398 <MRI,BOTH,SCRIPT,EXPRESSION>[ \t\r]+ { }
399
400 <VERS_NODE,VERS_SCRIPT>[:,;] { return *yytext; }
401
402 <VERS_NODE>global { RTOKEN(GLOBAL); }
403
404 <VERS_NODE>local { RTOKEN(LOCAL); }
405
406 <VERS_NODE>extern { RTOKEN(EXTERN); }
407
408 <VERS_NODE>{V_IDENTIFIER} { yylval.name = xstrdup (yytext);
409 return VERS_IDENTIFIER; }
410
411 <VERS_SCRIPT>{V_TAG} { yylval.name = xstrdup (yytext);
412 return VERS_TAG; }
413
414 <VERS_START>"{" { BEGIN(VERS_SCRIPT); return *yytext; }
415
416 <VERS_SCRIPT>"{" { BEGIN(VERS_NODE);
417 vers_node_nesting = 0;
418 return *yytext;
419 }
420 <VERS_SCRIPT>"}" { return *yytext; }
421 <VERS_NODE>"{" { vers_node_nesting++; return *yytext; }
422 <VERS_NODE>"}" { if (--vers_node_nesting < 0)
423 BEGIN(VERS_SCRIPT);
424 return *yytext;
425 }
426
427 <VERS_START,VERS_NODE,VERS_SCRIPT>[\n] { lineno++; }
428
429 <VERS_START,VERS_NODE,VERS_SCRIPT>#.* { /* Eat up comments */ }
430
431 <VERS_START,VERS_NODE,VERS_SCRIPT>[ \t\r]+ { /* Eat up whitespace */ }
432
433 <<EOF>> {
434 include_stack_ptr--;
435
436 if (include_stack_ptr == 0)
437 {
438 yyterminate ();
439 }
440 else
441 {
442 yy_switch_to_buffer (include_stack[include_stack_ptr]);
443 }
444
445 ldfile_input_filename = file_name_stack[include_stack_ptr - 1];
446 lineno = lineno_stack[include_stack_ptr];
447
448 return END;
449 }
450
451 <SCRIPT,MRI,VERS_START,VERS_SCRIPT,VERS_NODE>. lex_warn_invalid (" in script", yytext);
452 <EXPRESSION,DEFSYMEXP,BOTH>. lex_warn_invalid (" in expression", yytext);
453
454 %%
455
456
457 /* Switch flex to reading script file NAME, open on FILE,
458 saving the current input info on the include stack. */
459
460 void
461 lex_push_file (FILE *file, const char *name)
462 {
463 if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
464 {
465 einfo ("%F:includes nested too deeply\n");
466 }
467 file_name_stack[include_stack_ptr] = name;
468 lineno_stack[include_stack_ptr] = lineno;
469 include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
470
471 include_stack_ptr++;
472 lineno = 1;
473 yyin = file;
474 yy_switch_to_buffer (yy_create_buffer (yyin, YY_BUF_SIZE));
475 }
476
477 /* Return a newly created flex input buffer containing STRING,
478 which is SIZE bytes long. */
479
480 static YY_BUFFER_STATE
481 yy_create_string_buffer (const char *string, size_t size)
482 {
483 YY_BUFFER_STATE b;
484
485 /* Calls to m-alloc get turned by sed into xm-alloc. */
486 b = malloc (sizeof (struct yy_buffer_state));
487 b->yy_input_file = 0;
488 b->yy_buf_size = size;
489
490 /* yy_ch_buf has to be 2 characters longer than the size given because
491 we need to put in 2 end-of-buffer characters. */
492 b->yy_ch_buf = malloc ((unsigned) (b->yy_buf_size + 3));
493
494 b->yy_ch_buf[0] = '\n';
495 strcpy (b->yy_ch_buf+1, string);
496 b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
497 b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
498 b->yy_n_chars = size+1;
499 b->yy_buf_pos = &b->yy_ch_buf[1];
500
501 b->yy_is_our_buffer = 1;
502 b->yy_is_interactive = 0;
503 b->yy_at_bol = 1;
504 b->yy_fill_buffer = 0;
505
506 /* flex 2.4.7 changed the interface. FIXME: We should not be using
507 a flex internal interface in the first place! */
508 #ifdef YY_BUFFER_NEW
509 b->yy_buffer_status = YY_BUFFER_NEW;
510 #else
511 b->yy_eof_status = EOF_NOT_SEEN;
512 #endif
513
514 return b;
515 }
516
517 /* Switch flex to reading from STRING, saving the current input info
518 on the include stack. */
519
520 void
521 lex_redirect (const char *string)
522 {
523 YY_BUFFER_STATE tmp;
524
525 yy_init = 0;
526 if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
527 {
528 einfo("%F: macros nested too deeply\n");
529 }
530 file_name_stack[include_stack_ptr] = "redirect";
531 lineno_stack[include_stack_ptr] = lineno;
532 include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
533 include_stack_ptr++;
534 lineno = 1;
535 tmp = yy_create_string_buffer (string, strlen (string));
536 yy_switch_to_buffer (tmp);
537 }
538
539 /* Functions to switch to a different flex start condition,
540 saving the current start condition on `state_stack'. */
541
542 static int state_stack[MAX_INCLUDE_DEPTH * 2];
543 static int *state_stack_p = state_stack;
544
545 void
546 ldlex_script (void)
547 {
548 *(state_stack_p)++ = yy_start;
549 BEGIN (SCRIPT);
550 }
551
552 void
553 ldlex_mri_script (void)
554 {
555 *(state_stack_p)++ = yy_start;
556 BEGIN (MRI);
557 }
558
559 void
560 ldlex_version_script (void)
561 {
562 *(state_stack_p)++ = yy_start;
563 BEGIN (VERS_START);
564 }
565
566 void
567 ldlex_version_file (void)
568 {
569 *(state_stack_p)++ = yy_start;
570 BEGIN (VERS_SCRIPT);
571 }
572
573 void
574 ldlex_defsym (void)
575 {
576 *(state_stack_p)++ = yy_start;
577 BEGIN (DEFSYMEXP);
578 }
579
580 void
581 ldlex_expression (void)
582 {
583 *(state_stack_p)++ = yy_start;
584 BEGIN (EXPRESSION);
585 }
586
587 void
588 ldlex_both (void)
589 {
590 *(state_stack_p)++ = yy_start;
591 BEGIN (BOTH);
592 }
593
594 void
595 ldlex_popstate (void)
596 {
597 yy_start = *(--state_stack_p);
598 }
599
600
601 /* Place up to MAX_SIZE characters in BUF and return in *RESULT
602 either the number of characters read, or 0 to indicate EOF. */
603
604 static void
605 yy_input (char *buf, int *result, int max_size)
606 {
607 *result = 0;
608 if (YY_CURRENT_BUFFER->yy_input_file)
609 {
610 if (yyin)
611 {
612 *result = fread (buf, 1, max_size, yyin);
613 if (*result < max_size && ferror (yyin))
614 einfo ("%F%P: read in flex scanner failed\n");
615 }
616 }
617 }
618
619 /* Eat the rest of a C-style comment. */
620
621 static void
622 comment (void)
623 {
624 int c;
625
626 while (1)
627 {
628 c = input();
629 while (c != '*' && c != EOF)
630 {
631 if (c == '\n')
632 lineno++;
633 c = input();
634 }
635
636 if (c == '*')
637 {
638 c = input();
639 while (c == '*')
640 c = input();
641 if (c == '/')
642 break; /* found the end */
643 }
644
645 if (c == '\n')
646 lineno++;
647
648 if (c == EOF)
649 {
650 einfo( "%F%P: EOF in comment\n");
651 break;
652 }
653 }
654 }
655
656 /* Warn the user about a garbage character WHAT in the input
657 in context WHERE. */
658
659 static void
660 lex_warn_invalid (char *where, char *what)
661 {
662 char buf[5];
663
664 /* If we have found an input file whose format we do not recognize,
665 and we are therefore treating it as a linker script, and we find
666 an invalid character, then most likely this is a real object file
667 of some different format. Treat it as such. */
668 if (ldfile_assumed_script)
669 {
670 bfd_set_error (bfd_error_file_not_recognized);
671 einfo ("%F%s: file not recognized: %E\n", ldfile_input_filename);
672 }
673
674 if (! ISPRINT (*what))
675 {
676 sprintf (buf, "\\%03o", (unsigned int) *what);
677 what = buf;
678 }
679
680 einfo ("%P:%S: ignoring invalid character `%s'%s\n", what, where);
681 }
682