bfd/
[external/binutils.git] / ld / ldlex.l
1 %{
2
3 /* Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4    2000, 2001, 2002, 2003, 2004, 2005, 2007
5    Free Software Foundation, Inc.
6
7    This file is part of GLD, the Gnu Linker.
8
9    GLD is free software; you can redistribute it and/or modify
10    it under the terms of the GNU General Public License as published by
11    the Free Software Foundation; either version 2, or (at your option)
12    any later version.
13
14    GLD is distributed in the hope that it will be useful,
15    but WITHOUT ANY WARRANTY; without even the implied warranty of
16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17    GNU General Public License for more details.
18
19    You should have received a copy of the GNU General Public License
20    along with GLD; see the file COPYING.  If not, write to the Free
21    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
22    02110-1301, USA.  */
23
24 /*
25 This was written by steve chamberlain
26                     sac@cygnus.com
27 */
28
29 #include "sysdep.h"
30 #include "bfd.h"
31 #include "safe-ctype.h"
32 #include "bfdlink.h"
33 #include "ld.h"
34 #include "ldmisc.h"
35 #include "ldexp.h"
36 #include "ldlang.h"
37 #include <ldgram.h>
38 #include "ldfile.h"
39 #include "ldlex.h"
40 #include "ldmain.h"
41 #include "libiberty.h"
42
43 /* The type of top-level parser input.
44    yylex and yyparse (indirectly) both check this.  */
45 input_type parser_input;
46
47 /* Line number in the current input file.
48    (FIXME Actually, it doesn't appear to get reset for each file?)  */
49 unsigned int lineno = 1;
50
51 /* The string we are currently lexing, or NULL if we are reading a
52    file.  */
53 const char *lex_string = NULL;
54
55 /* Support for flex reading from more than one input file (stream).
56    `include_stack' is flex's input state for each open file;
57    `file_name_stack' is the file names.  `lineno_stack' is the current
58    line numbers.
59
60    If `include_stack_ptr' is 0, we haven't started reading anything yet.
61    Otherwise, stack elements 0 through `include_stack_ptr - 1' are valid.  */
62
63 #undef YY_INPUT
64 #define YY_INPUT(buf,result,max_size) yy_input (buf, &result, max_size)
65
66 #define YY_NO_UNPUT
67
68 #define MAX_INCLUDE_DEPTH 10
69 static YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
70 static const char *file_name_stack[MAX_INCLUDE_DEPTH];
71 static unsigned int lineno_stack[MAX_INCLUDE_DEPTH];
72 static unsigned int include_stack_ptr = 0;
73 static int vers_node_nesting = 0;
74
75 static void yy_input (char *, int *, int);
76 static void comment (void);
77 static void lex_warn_invalid (char *where, char *what);
78
79 /* STATES
80         EXPRESSION      definitely in an expression
81         SCRIPT          definitely in a script
82         BOTH            either EXPRESSION or SCRIPT
83         DEFSYMEXP       in an argument to -defsym
84         MRI             in an MRI script
85         VERS_START      starting a Sun style mapfile
86         VERS_SCRIPT     a Sun style mapfile
87         VERS_NODE       a node within a Sun style mapfile
88 */
89 #define RTOKEN(x)  {  yylval.token = x; return x; }
90
91 /* Some versions of flex want this.  */
92 #ifndef yywrap
93 int yywrap (void) { return 1; }
94 #endif
95 %}
96
97 %a 4000
98 %o 5000
99
100 CMDFILENAMECHAR   [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
101 CMDFILENAMECHAR1  [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
102 FILENAMECHAR1   [_a-zA-Z\/\.\\\$\_\~]
103 SYMBOLCHARN     [_a-zA-Z\/\.\\\$\_\~0-9]
104 FILENAMECHAR    [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
105 WILDCHAR        [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~\?\*]
106 WHITE           [ \t\n\r]+
107
108 NOCFILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
109
110 V_TAG [.$_a-zA-Z][._a-zA-Z0-9]*
111 V_IDENTIFIER [*?.$_a-zA-Z\[\]\-\!\^\\]([*?.$_a-zA-Z0-9\[\]\-\!\^\\]|::)*
112
113 %s SCRIPT
114 %s EXPRESSION
115 %s BOTH
116 %s DEFSYMEXP
117 %s MRI
118 %s VERS_START
119 %s VERS_SCRIPT
120 %s VERS_NODE
121 %%
122
123   if (parser_input != input_selected)
124     {
125       /* The first token of the input determines the initial parser state.  */
126       input_type t = parser_input;
127       parser_input = input_selected;
128       switch (t)
129         {
130         case input_script: return INPUT_SCRIPT; break;
131         case input_mri_script: return INPUT_MRI_SCRIPT; break;
132         case input_version_script: return INPUT_VERSION_SCRIPT; break;
133         case input_dynamic_list: return INPUT_DYNAMIC_LIST; break;
134         case input_defsym: return INPUT_DEFSYM; break;
135         default: abort ();
136         }
137     }
138
139 <BOTH,SCRIPT,EXPRESSION,VERS_START,VERS_NODE,VERS_SCRIPT>"/*"   { comment (); }
140
141
142 <DEFSYMEXP>"-"                  { RTOKEN('-');}
143 <DEFSYMEXP>"+"                  { RTOKEN('+');}
144 <DEFSYMEXP>{FILENAMECHAR1}{SYMBOLCHARN}*   { yylval.name = xstrdup (yytext); return NAME; }
145 <DEFSYMEXP>"="                  { RTOKEN('='); }
146
147 <MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
148                                 yylval.integer = bfd_scan_vma (yytext + 1, 0, 16);
149                                 yylval.bigint.str = NULL;
150                                 return INT;
151                         }
152
153 <MRI,EXPRESSION>([0-9A-Fa-f])+(H|h|X|x|B|b|O|o|D|d) {
154                                    int ibase ;
155                                    switch (yytext[yyleng - 1]) {
156                                     case 'X':
157                                     case 'x':
158                                     case 'H':
159                                     case 'h':
160                                      ibase = 16;
161                                      break;
162                                     case 'O':
163                                     case 'o':
164                                      ibase = 8;
165                                      break;
166                                     case 'B':
167                                     case 'b':
168                                      ibase = 2;
169                                      break;
170                                     default:
171                                      ibase = 10;
172                                    }
173                                    yylval.integer = bfd_scan_vma (yytext, 0,
174                                                                   ibase);
175                                    yylval.bigint.str = NULL;
176                                    return INT;
177                                  }
178 <SCRIPT,DEFSYMEXP,MRI,BOTH,EXPRESSION>((("$"|0[xX])([0-9A-Fa-f])+)|(([0-9])+))(M|K|m|k)? {
179                                   char *s = yytext;
180                                   int ibase = 0;
181
182                                   if (*s == '$')
183                                     {
184                                       ++s;
185                                       ibase = 16;
186                                     }
187                                   yylval.integer = bfd_scan_vma (s, 0, ibase);
188                                   yylval.bigint.str = NULL;
189                                   if (yytext[yyleng - 1] == 'M'
190                                       || yytext[yyleng - 1] == 'm')
191                                     {
192                                       yylval.integer *= 1024 * 1024;
193                                     }
194                                   else if (yytext[yyleng - 1] == 'K'
195                                       || yytext[yyleng - 1]=='k')
196                                     {
197                                       yylval.integer *= 1024;
198                                     }
199                                   else if (yytext[0] == '0'
200                                            && (yytext[1] == 'x'
201                                                || yytext[1] == 'X'))
202                                     {
203                                       yylval.bigint.str = xstrdup (yytext + 2);
204                                     }
205                                   return INT;
206                                 }
207 <BOTH,SCRIPT,EXPRESSION,MRI>"]"         { RTOKEN(']');}
208 <BOTH,SCRIPT,EXPRESSION,MRI>"["         { RTOKEN('[');}
209 <BOTH,SCRIPT,EXPRESSION,MRI>"<<="       { RTOKEN(LSHIFTEQ);}
210 <BOTH,SCRIPT,EXPRESSION,MRI>">>="       { RTOKEN(RSHIFTEQ);}
211 <BOTH,SCRIPT,EXPRESSION,MRI>"||"        { RTOKEN(OROR);}
212 <BOTH,SCRIPT,EXPRESSION,MRI>"=="        { RTOKEN(EQ);}
213 <BOTH,SCRIPT,EXPRESSION,MRI>"!="        { RTOKEN(NE);}
214 <BOTH,SCRIPT,EXPRESSION,MRI>">="        { RTOKEN(GE);}
215 <BOTH,SCRIPT,EXPRESSION,MRI>"<="        { RTOKEN(LE);}
216 <BOTH,SCRIPT,EXPRESSION,MRI>"<<"        { RTOKEN(LSHIFT);}
217 <BOTH,SCRIPT,EXPRESSION,MRI>">>"        { RTOKEN(RSHIFT);}
218 <BOTH,SCRIPT,EXPRESSION,MRI>"+="        { RTOKEN(PLUSEQ);}
219 <BOTH,SCRIPT,EXPRESSION,MRI>"-="        { RTOKEN(MINUSEQ);}
220 <BOTH,SCRIPT,EXPRESSION,MRI>"*="        { RTOKEN(MULTEQ);}
221 <BOTH,SCRIPT,EXPRESSION,MRI>"/="        { RTOKEN(DIVEQ);}
222 <BOTH,SCRIPT,EXPRESSION,MRI>"&="        { RTOKEN(ANDEQ);}
223 <BOTH,SCRIPT,EXPRESSION,MRI>"|="        { RTOKEN(OREQ);}
224 <BOTH,SCRIPT,EXPRESSION,MRI>"&&"        { RTOKEN(ANDAND);}
225 <BOTH,SCRIPT,EXPRESSION,MRI>">"         { RTOKEN('>');}
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>"MEMORY"                   { RTOKEN(MEMORY);}
246 <BOTH,SCRIPT,EXPRESSION>"ORIGIN"        { RTOKEN(ORIGIN);}
247 <BOTH,SCRIPT>"VERSION"                  { RTOKEN(VERSIONK);}
248 <EXPRESSION,BOTH,SCRIPT>"BLOCK"         { RTOKEN(BLOCK);}
249 <EXPRESSION,BOTH,SCRIPT>"BIND"          { RTOKEN(BIND);}
250 <BOTH,SCRIPT,EXPRESSION>"LENGTH"        { RTOKEN(LENGTH);}
251 <EXPRESSION,BOTH,SCRIPT>"ALIGN"         { RTOKEN(ALIGN_K);}
252 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_ALIGN"    { RTOKEN(DATA_SEGMENT_ALIGN);}
253 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_RELRO_END"        { RTOKEN(DATA_SEGMENT_RELRO_END);}
254 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_END"      { RTOKEN(DATA_SEGMENT_END);}
255 <EXPRESSION,BOTH,SCRIPT>"ADDR"          { RTOKEN(ADDR);}
256 <EXPRESSION,BOTH,SCRIPT>"LOADADDR"      { RTOKEN(LOADADDR);}
257 <EXPRESSION,BOTH>"MAX"                  { RTOKEN(MAX_K); }
258 <EXPRESSION,BOTH>"MIN"                  { RTOKEN(MIN_K); }
259 <EXPRESSION,BOTH>"ASSERT"               { RTOKEN(ASSERT_K); }
260 <BOTH,SCRIPT>"ENTRY"                    { RTOKEN(ENTRY);}
261 <BOTH,SCRIPT,MRI>"EXTERN"               { RTOKEN(EXTERN);}
262 <EXPRESSION,BOTH,SCRIPT>"NEXT"          { RTOKEN(NEXT);}
263 <EXPRESSION,BOTH,SCRIPT>"sizeof_headers"        { RTOKEN(SIZEOF_HEADERS);}
264 <EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS"        { RTOKEN(SIZEOF_HEADERS);}
265 <EXPRESSION,BOTH,SCRIPT>"SEGMENT_START" { RTOKEN(SEGMENT_START);}
266 <BOTH,SCRIPT>"MAP"                      { RTOKEN(MAP);}
267 <EXPRESSION,BOTH,SCRIPT>"SIZEOF"        { RTOKEN(SIZEOF);}
268 <BOTH,SCRIPT>"TARGET"                   { RTOKEN(TARGET_K);}
269 <BOTH,SCRIPT>"SEARCH_DIR"               { RTOKEN(SEARCH_DIR);}
270 <BOTH,SCRIPT>"OUTPUT"                   { RTOKEN(OUTPUT);}
271 <BOTH,SCRIPT>"INPUT"                    { RTOKEN(INPUT);}
272 <EXPRESSION,BOTH,SCRIPT>"GROUP"         { RTOKEN(GROUP);}
273 <EXPRESSION,BOTH,SCRIPT>"AS_NEEDED"     { RTOKEN(AS_NEEDED);}
274 <EXPRESSION,BOTH,SCRIPT>"DEFINED"       { RTOKEN(DEFINED);}
275 <BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS"    { RTOKEN(CREATE_OBJECT_SYMBOLS);}
276 <BOTH,SCRIPT>"CONSTRUCTORS"             { RTOKEN( CONSTRUCTORS);}
277 <BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION"  { RTOKEN(FORCE_COMMON_ALLOCATION);}
278 <BOTH,SCRIPT>"INHIBIT_COMMON_ALLOCATION" { RTOKEN(INHIBIT_COMMON_ALLOCATION);}
279 <BOTH,SCRIPT>"SECTIONS"                 { RTOKEN(SECTIONS);}
280 <BOTH,SCRIPT>"FILL"                     { RTOKEN(FILL);}
281 <BOTH,SCRIPT>"STARTUP"                  { RTOKEN(STARTUP);}
282 <BOTH,SCRIPT>"OUTPUT_FORMAT"            { RTOKEN(OUTPUT_FORMAT);}
283 <BOTH,SCRIPT>"OUTPUT_ARCH"              { RTOKEN( OUTPUT_ARCH);}
284 <BOTH,SCRIPT>"HLL"                      { RTOKEN(HLL);}
285 <BOTH,SCRIPT>"SYSLIB"                   { RTOKEN(SYSLIB);}
286 <BOTH,SCRIPT>"FLOAT"                    { RTOKEN(FLOAT);}
287 <BOTH,SCRIPT>"QUAD"                     { RTOKEN( QUAD);}
288 <BOTH,SCRIPT>"SQUAD"                    { RTOKEN( SQUAD);}
289 <BOTH,SCRIPT>"LONG"                     { RTOKEN( LONG);}
290 <BOTH,SCRIPT>"SHORT"                    { RTOKEN( SHORT);}
291 <BOTH,SCRIPT>"BYTE"                     { RTOKEN( BYTE);}
292 <BOTH,SCRIPT>"NOFLOAT"                  { RTOKEN(NOFLOAT);}
293 <EXPRESSION,BOTH,SCRIPT>"NOCROSSREFS"   { RTOKEN(NOCROSSREFS);}
294 <BOTH,SCRIPT>"OVERLAY"                  { RTOKEN(OVERLAY); }
295 <BOTH,SCRIPT>"SORT_BY_NAME"             { RTOKEN(SORT_BY_NAME); }
296 <BOTH,SCRIPT>"SORT_BY_ALIGNMENT"        { RTOKEN(SORT_BY_ALIGNMENT); }
297 <BOTH,SCRIPT>"SORT"                     { RTOKEN(SORT_BY_NAME); }
298 <EXPRESSION,BOTH,SCRIPT>"NOLOAD"        { RTOKEN(NOLOAD);}
299 <EXPRESSION,BOTH,SCRIPT>"DSECT"         { RTOKEN(DSECT);}
300 <EXPRESSION,BOTH,SCRIPT>"COPY"          { RTOKEN(COPY);}
301 <EXPRESSION,BOTH,SCRIPT>"INFO"          { RTOKEN(INFO);}
302 <EXPRESSION,BOTH,SCRIPT>"OVERLAY"       { RTOKEN(OVERLAY);}
303 <EXPRESSION,BOTH,SCRIPT>"ONLY_IF_RO"    { RTOKEN(ONLY_IF_RO); }
304 <EXPRESSION,BOTH,SCRIPT>"ONLY_IF_RW"    { RTOKEN(ONLY_IF_RW); }
305 <EXPRESSION,BOTH,SCRIPT>"SPECIAL"       { RTOKEN(SPECIAL); }
306 <BOTH,SCRIPT>"o"                        { RTOKEN(ORIGIN);}
307 <BOTH,SCRIPT>"org"                      { RTOKEN(ORIGIN);}
308 <BOTH,SCRIPT>"l"                        { RTOKEN( LENGTH);}
309 <BOTH,SCRIPT>"len"                      { RTOKEN( LENGTH);}
310 <BOTH,SCRIPT>"INCLUDE"                  { RTOKEN(INCLUDE);}
311 <BOTH,SCRIPT>"PHDRS"                    { RTOKEN (PHDRS); }
312 <EXPRESSION,BOTH,SCRIPT>"AT"            { RTOKEN(AT);}
313 <EXPRESSION,BOTH,SCRIPT>"SUBALIGN"      { RTOKEN(SUBALIGN);}
314 <EXPRESSION,BOTH,SCRIPT>"PROVIDE"       { RTOKEN(PROVIDE); }
315 <EXPRESSION,BOTH,SCRIPT>"PROVIDE_HIDDEN" { RTOKEN(PROVIDE_HIDDEN); }
316 <EXPRESSION,BOTH,SCRIPT>"KEEP"          { RTOKEN(KEEP); }
317 <EXPRESSION,BOTH,SCRIPT>"EXCLUDE_FILE"  { RTOKEN(EXCLUDE_FILE); }
318 <EXPRESSION,BOTH,SCRIPT>"CONSTANT"      { RTOKEN(CONSTANT);}
319 <MRI>"#".*\n?                   { ++ lineno; }
320 <MRI>"\n"                       { ++ lineno;  RTOKEN(NEWLINE); }
321 <MRI>"*".*                      { /* Mri comment line */ }
322 <MRI>";".*                      { /* Mri comment line */ }
323 <MRI>"END"                      { RTOKEN(ENDWORD); }
324 <MRI>"ALIGNMOD"                 { RTOKEN(ALIGNMOD);}
325 <MRI>"ALIGN"                    { RTOKEN(ALIGN_K);}
326 <MRI>"CHIP"                     { RTOKEN(CHIP); }
327 <MRI>"BASE"                     { RTOKEN(BASE); }
328 <MRI>"ALIAS"                    { RTOKEN(ALIAS); }
329 <MRI>"TRUNCATE"                 { RTOKEN(TRUNCATE); }
330 <MRI>"LOAD"                     { RTOKEN(LOAD); }
331 <MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
332 <MRI>"ORDER"                    { RTOKEN(ORDER); }
333 <MRI>"NAME"                     { RTOKEN(NAMEWORD); }
334 <MRI>"FORMAT"                   { RTOKEN(FORMAT); }
335 <MRI>"CASE"                     { RTOKEN(CASE); }
336 <MRI>"START"                    { RTOKEN(START); }
337 <MRI>"LIST".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
338 <MRI>"SECT"                     { RTOKEN(SECT); }
339 <EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE"                  { RTOKEN(ABSOLUTE); }
340 <MRI>"end"                      { RTOKEN(ENDWORD); }
341 <MRI>"alignmod"                 { RTOKEN(ALIGNMOD);}
342 <MRI>"align"                    { RTOKEN(ALIGN_K);}
343 <MRI>"chip"                     { RTOKEN(CHIP); }
344 <MRI>"base"                     { RTOKEN(BASE); }
345 <MRI>"alias"                    { RTOKEN(ALIAS); }
346 <MRI>"truncate"                 { RTOKEN(TRUNCATE); }
347 <MRI>"load"                     { RTOKEN(LOAD); }
348 <MRI>"public"                   { RTOKEN(PUBLIC); }
349 <MRI>"order"                    { RTOKEN(ORDER); }
350 <MRI>"name"                     { RTOKEN(NAMEWORD); }
351 <MRI>"format"                   { RTOKEN(FORMAT); }
352 <MRI>"case"                     { RTOKEN(CASE); }
353 <MRI>"extern"                   { RTOKEN(EXTERN); }
354 <MRI>"start"                    { RTOKEN(START); }
355 <MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
356 <MRI>"sect"                     { RTOKEN(SECT); }
357 <EXPRESSION,BOTH,SCRIPT,MRI>"absolute"                  { RTOKEN(ABSOLUTE); }
358
359 <MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*  {
360 /* Filename without commas, needed to parse mri stuff */
361                                  yylval.name = xstrdup (yytext);
362                                   return NAME;
363                                 }
364
365
366 <BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}* {
367                                  yylval.name = xstrdup (yytext);
368                                   return NAME;
369                                 }
370 <BOTH,EXPRESSION>"-l"{FILENAMECHAR}+ {
371                                   yylval.name = xstrdup (yytext + 2);
372                                   return LNAME;
373                                 }
374 <SCRIPT>{WILDCHAR}* {
375                 /* Annoyingly, this pattern can match comments, and we have
376                    longest match issues to consider.  So if the first two
377                    characters are a comment opening, put the input back and
378                    try again.  */
379                 if (yytext[0] == '/' && yytext[1] == '*')
380                   {
381                     yyless (2);
382                     comment ();
383                   }
384                 else
385                   {
386                     yylval.name = xstrdup (yytext);
387                     return NAME;
388                   }
389         }
390
391 <EXPRESSION,BOTH,SCRIPT,VERS_NODE>"\""[^\"]*"\"" {
392                                         /* No matter the state, quotes
393                                            give what's inside */
394                                         yylval.name = xstrdup (yytext + 1);
395                                         yylval.name[yyleng - 2] = 0;
396                                         return NAME;
397                                 }
398 <BOTH,SCRIPT,EXPRESSION>"\n"            { lineno++;}
399 <MRI,BOTH,SCRIPT,EXPRESSION>[ \t\r]+    { }
400
401 <VERS_NODE,VERS_SCRIPT>[:,;]    { return *yytext; }
402
403 <VERS_NODE>global               { RTOKEN(GLOBAL); }
404
405 <VERS_NODE>local                { RTOKEN(LOCAL); }
406
407 <VERS_NODE>extern               { RTOKEN(EXTERN); }
408
409 <VERS_NODE>{V_IDENTIFIER}       { yylval.name = xstrdup (yytext);
410                                   return VERS_IDENTIFIER; }
411
412 <VERS_SCRIPT>{V_TAG}            { yylval.name = xstrdup (yytext);
413                                   return VERS_TAG; }
414
415 <VERS_START>"{"                 { BEGIN(VERS_SCRIPT); return *yytext; }
416
417 <VERS_SCRIPT>"{"                { BEGIN(VERS_NODE);
418                                   vers_node_nesting = 0;
419                                   return *yytext;
420                                 }
421 <VERS_SCRIPT>"}"                { return *yytext; }
422 <VERS_NODE>"{"                  { vers_node_nesting++; return *yytext; }
423 <VERS_NODE>"}"                  { if (--vers_node_nesting < 0)
424                                     BEGIN(VERS_SCRIPT);
425                                   return *yytext;
426                                 }
427
428 <VERS_START,VERS_NODE,VERS_SCRIPT>[\n]          { lineno++; }
429
430 <VERS_START,VERS_NODE,VERS_SCRIPT>#.*           { /* Eat up comments */ }
431
432 <VERS_START,VERS_NODE,VERS_SCRIPT>[ \t\r]+      { /* Eat up whitespace */ }
433
434 <<EOF>> {
435   include_stack_ptr--;
436
437   if (include_stack_ptr == 0)
438   {
439     yyterminate ();
440   }
441   else
442   {
443     yy_switch_to_buffer (include_stack[include_stack_ptr]);
444   }
445
446   ldfile_input_filename = file_name_stack[include_stack_ptr - 1];
447   lineno = lineno_stack[include_stack_ptr];
448
449   return END;
450 }
451
452 <SCRIPT,MRI,VERS_START,VERS_SCRIPT,VERS_NODE>.  lex_warn_invalid (" in script", yytext);
453 <EXPRESSION,DEFSYMEXP,BOTH>.    lex_warn_invalid (" in expression", yytext);
454
455 %%
456 \f
457
458 /* Switch flex to reading script file NAME, open on FILE,
459    saving the current input info on the include stack.  */
460
461 void
462 lex_push_file (FILE *file, const char *name)
463 {
464   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
465     {
466       einfo ("%F:includes nested too deeply\n");
467     }
468   file_name_stack[include_stack_ptr] = name;
469   lineno_stack[include_stack_ptr] = lineno;
470   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
471
472   include_stack_ptr++;
473   lineno = 1;
474   yyin = file;
475   yy_switch_to_buffer (yy_create_buffer (yyin, YY_BUF_SIZE));
476 }
477
478 /* Return a newly created flex input buffer containing STRING,
479    which is SIZE bytes long.  */
480
481 static YY_BUFFER_STATE
482 yy_create_string_buffer (const char *string, size_t size)
483 {
484   YY_BUFFER_STATE b;
485
486   /* Calls to m-alloc get turned by sed into xm-alloc.  */
487   b = malloc (sizeof (struct yy_buffer_state));
488   b->yy_input_file = 0;
489   b->yy_buf_size = size;
490
491   /* yy_ch_buf has to be 2 characters longer than the size given because
492      we need to put in 2 end-of-buffer characters.  */
493   b->yy_ch_buf = malloc ((unsigned) (b->yy_buf_size + 3));
494
495   b->yy_ch_buf[0] = '\n';
496   strcpy (b->yy_ch_buf+1, string);
497   b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
498   b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
499   b->yy_n_chars = size+1;
500   b->yy_buf_pos = &b->yy_ch_buf[1];
501
502   b->yy_is_our_buffer = 1;
503   b->yy_is_interactive = 0;
504   b->yy_at_bol = 1;
505   b->yy_fill_buffer = 0;
506
507   /* flex 2.4.7 changed the interface.  FIXME: We should not be using
508      a flex internal interface in the first place!  */
509 #ifdef YY_BUFFER_NEW
510   b->yy_buffer_status = YY_BUFFER_NEW;
511 #else
512   b->yy_eof_status = EOF_NOT_SEEN;
513 #endif
514
515   return b;
516 }
517
518 /* Switch flex to reading from STRING, saving the current input info
519    on the include stack.  */
520
521 void
522 lex_redirect (const char *string)
523 {
524   YY_BUFFER_STATE tmp;
525
526   yy_init = 0;
527   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
528     {
529       einfo("%F: macros nested too deeply\n");
530     }
531   file_name_stack[include_stack_ptr] = "redirect";
532   lineno_stack[include_stack_ptr] = lineno;
533   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
534   include_stack_ptr++;
535   lineno = 1;
536   tmp = yy_create_string_buffer (string, strlen (string));
537   yy_switch_to_buffer (tmp);
538 }
539 \f
540 /* Functions to switch to a different flex start condition,
541    saving the current start condition on `state_stack'.  */
542
543 static int state_stack[MAX_INCLUDE_DEPTH * 2];
544 static int *state_stack_p = state_stack;
545
546 void
547 ldlex_script (void)
548 {
549   *(state_stack_p)++ = yy_start;
550   BEGIN (SCRIPT);
551 }
552
553 void
554 ldlex_mri_script (void)
555 {
556   *(state_stack_p)++ = yy_start;
557   BEGIN (MRI);
558 }
559
560 void
561 ldlex_version_script (void)
562 {
563   *(state_stack_p)++ = yy_start;
564   BEGIN (VERS_START);
565 }
566
567 void
568 ldlex_version_file (void)
569 {
570   *(state_stack_p)++ = yy_start;
571   BEGIN (VERS_SCRIPT);
572 }
573
574 void
575 ldlex_defsym (void)
576 {
577   *(state_stack_p)++ = yy_start;
578   BEGIN (DEFSYMEXP);
579 }
580
581 void
582 ldlex_expression (void)
583 {
584   *(state_stack_p)++ = yy_start;
585   BEGIN (EXPRESSION);
586 }
587
588 void
589 ldlex_both (void)
590 {
591   *(state_stack_p)++ = yy_start;
592   BEGIN (BOTH);
593 }
594
595 void
596 ldlex_popstate (void)
597 {
598   yy_start = *(--state_stack_p);
599 }
600 \f
601
602 /* Place up to MAX_SIZE characters in BUF and return in *RESULT
603    either the number of characters read, or 0 to indicate EOF.  */
604
605 static void
606 yy_input (char *buf, int *result, int max_size)
607 {
608   *result = 0;
609   if (YY_CURRENT_BUFFER->yy_input_file)
610     {
611       if (yyin)
612         {
613           *result = fread (buf, 1, max_size, yyin);
614           if (*result < max_size && ferror (yyin))
615             einfo ("%F%P: read in flex scanner failed\n");
616         }
617     }
618 }
619
620 /* Eat the rest of a C-style comment.  */
621
622 static void
623 comment (void)
624 {
625   int c;
626
627   while (1)
628   {
629     c = input();
630     while (c != '*' && c != EOF)
631     {
632       if (c == '\n')
633         lineno++;
634       c = input();
635     }
636
637     if (c == '*')
638     {
639       c = input();
640       while (c == '*')
641        c = input();
642       if (c == '/')
643        break;                   /* found the end */
644     }
645
646     if (c == '\n')
647       lineno++;
648
649     if (c == EOF)
650     {
651       einfo( "%F%P: EOF in comment\n");
652       break;
653     }
654   }
655 }
656
657 /* Warn the user about a garbage character WHAT in the input
658    in context WHERE.  */
659
660 static void
661 lex_warn_invalid (char *where, char *what)
662 {
663   char buf[5];
664
665   /* If we have found an input file whose format we do not recognize,
666      and we are therefore treating it as a linker script, and we find
667      an invalid character, then most likely this is a real object file
668      of some different format.  Treat it as such.  */
669   if (ldfile_assumed_script)
670     {
671       bfd_set_error (bfd_error_file_not_recognized);
672       einfo ("%F%s: file not recognized: %E\n", ldfile_input_filename);
673     }
674
675   if (! ISPRINT (*what))
676     {
677       sprintf (buf, "\\%03o", (unsigned int) *what);
678       what = buf;
679     }
680
681   einfo ("%P:%S: ignoring invalid character `%s'%s\n", what, where);
682 }