* ld.texinfo (VERSION scripts): Symbol names are globbing patterns.
[external/binutils.git] / ld / ldlex.l
1 %{
2
3 /* Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4    2000, 2001, 2002  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, 59 Temple Place - Suite 330, Boston, MA
21 02111-1307, USA.  */
22
23 /*
24 This was written by steve chamberlain
25                     sac@cygnus.com
26 */
27
28
29 #include <ansidecl.h>
30 #include <stdio.h>
31
32 #ifdef MPW
33 /* Prevent enum redefinition problems. */
34 #define TRUE_FALSE_ALREADY_DEFINED
35 #endif /* MPW */
36
37 #include "bfd.h"
38 #include "sysdep.h"
39 #include "safe-ctype.h"
40 #include "ld.h"
41 #include "ldgram.h"
42 #include "ldmisc.h"
43 #include "ldexp.h"
44 #include "ldlang.h"
45 #include "ldfile.h"
46 #include "ldlex.h"
47 #include "ldmain.h"
48 #include "libiberty.h"
49
50 /* The type of top-level parser input.
51    yylex and yyparse (indirectly) both check this.  */
52 input_type parser_input;
53
54 /* Line number in the current input file.
55    (FIXME Actually, it doesn't appear to get reset for each file?)  */
56 unsigned int lineno = 1;
57
58 /* The string we are currently lexing, or NULL if we are reading a
59    file.  */
60 const char *lex_string = NULL;
61
62 /* Support for flex reading from more than one input file (stream).
63    `include_stack' is flex's input state for each open file;
64    `file_name_stack' is the file names.  `lineno_stack' is the current
65    line numbers.
66
67    If `include_stack_ptr' is 0, we haven't started reading anything yet.
68    Otherwise, stack elements 0 through `include_stack_ptr - 1' are valid.  */
69
70 #undef YY_INPUT
71 #define YY_INPUT(buf,result,max_size) yy_input(buf, &result, max_size)
72
73 #define MAX_INCLUDE_DEPTH 10
74 static YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
75 static const char *file_name_stack[MAX_INCLUDE_DEPTH];
76 static unsigned int lineno_stack[MAX_INCLUDE_DEPTH];
77 static unsigned int include_stack_ptr = 0;
78 static int vers_node_nesting = 0;
79
80 static YY_BUFFER_STATE yy_create_string_buffer PARAMS ((const char *string,
81                                                         size_t size));
82 static void yy_input PARAMS ((char *, int *result, int max_size));
83
84 static void comment PARAMS ((void));
85 static void lex_warn_invalid PARAMS ((char *where, char *what));
86
87 /* STATES 
88         EXPRESSION      definitely in an expression
89         SCRIPT          definitely in a script
90         BOTH            either EXPRESSION or SCRIPT
91         DEFSYMEXP       in an argument to -defsym
92         MRI             in an MRI script
93         VERS_START      starting a Sun style mapfile
94         VERS_SCRIPT     a Sun style mapfile
95         VERS_NODE       a node within a Sun style mapfile
96 */
97 #define RTOKEN(x)  {  yylval.token = x; return x; }
98
99 /* Some versions of flex want this.  */
100 #ifndef yywrap
101 int yywrap () { return 1; }
102 #endif
103 %}
104
105 %a 4000
106 %o 5000
107
108 CMDFILENAMECHAR   [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
109 CMDFILENAMECHAR1  [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
110 FILENAMECHAR1   [_a-zA-Z\/\.\\\$\_\~]
111 SYMBOLCHARN     [_a-zA-Z\/\.\\\$\_\~0-9]
112 FILENAMECHAR    [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
113 WILDCHAR        [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~\?\*]
114 WHITE           [ \t\n\r]+ 
115
116 NOCFILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
117
118 V_TAG [.$_a-zA-Z][._a-zA-Z0-9]*
119 V_IDENTIFIER [*?.$_a-zA-Z\[\]\-\!\^]([*?.$_a-zA-Z0-9\[\]\-\!\^]|::)*
120
121 %s SCRIPT
122 %s EXPRESSION
123 %s BOTH
124 %s DEFSYMEXP
125 %s MRI
126 %s VERS_START
127 %s VERS_SCRIPT
128 %s VERS_NODE
129 %%
130
131   if (parser_input != input_selected)
132     {
133       /* The first token of the input determines the initial parser state.  */
134       input_type t = parser_input;
135       parser_input = input_selected;
136       switch (t)
137         {
138         case input_script: return INPUT_SCRIPT; break;
139         case input_mri_script: return INPUT_MRI_SCRIPT; break;
140         case input_version_script: return INPUT_VERSION_SCRIPT; break;
141         case input_defsym: return INPUT_DEFSYM; break;
142         default: abort ();
143         }
144     }
145
146 <BOTH,SCRIPT,EXPRESSION>"/*"    { comment(); }
147
148
149 <DEFSYMEXP>"-"                  { RTOKEN('-');}
150 <DEFSYMEXP>"+"                  { RTOKEN('+');}
151 <DEFSYMEXP>{FILENAMECHAR1}{SYMBOLCHARN}*   { yylval.name = xstrdup(yytext); return NAME; }
152 <DEFSYMEXP>"="                  { RTOKEN('='); }
153
154 <MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
155                                 yylval.integer = bfd_scan_vma (yytext+1, 0,16);
156                                 return INT;
157                         }
158
159 <MRI,EXPRESSION>([0-9A-Fa-f])+(H|h|X|x|B|b|O|o|D|d) {
160                                    int ibase ;
161                                    switch (yytext[yyleng-1]) {
162                                     case 'X': 
163                                     case 'x':
164                                     case 'H':
165                                     case 'h':
166                                      ibase = 16;
167                                      break;
168                                     case 'O':
169                                     case 'o':
170                                      ibase = 8;
171                                      break;
172                                     case 'B':
173                                     case 'b':
174                                      ibase = 2;
175                                      break;
176                                     default:
177                                      ibase = 10;
178                                    }
179                                    yylval.integer = bfd_scan_vma (yytext, 0,
180                                                                   ibase);
181                                    return INT;
182                                  }
183 <SCRIPT,DEFSYMEXP,MRI,BOTH,EXPRESSION>((("$"|"0x")([0-9A-Fa-f])+)|(([0-9])+))(M|K|m|k)? {
184                                   char *s = yytext;
185
186                                   if (*s == '$')
187                                     ++s;
188                                   yylval.integer = bfd_scan_vma (s, 0, 0);
189                                   if (yytext[yyleng-1] == 'M'
190                                       || yytext[yyleng-1] == 'm')
191                                     yylval.integer *= 1024 * 1024;
192                                   if (yytext[yyleng-1] == 'K' 
193                                       || yytext[yyleng-1]=='k')
194                                     yylval.integer *= 1024;
195                                   return INT;
196                                 }
197 <BOTH,SCRIPT,EXPRESSION,MRI>"]"         { RTOKEN(']');}
198 <BOTH,SCRIPT,EXPRESSION,MRI>"["         { RTOKEN('[');}
199 <BOTH,SCRIPT,EXPRESSION,MRI>"<<="       { RTOKEN(LSHIFTEQ);}
200 <BOTH,SCRIPT,EXPRESSION,MRI>">>="       { RTOKEN(RSHIFTEQ);}
201 <BOTH,SCRIPT,EXPRESSION,MRI>"||"        { RTOKEN(OROR);}
202 <BOTH,SCRIPT,EXPRESSION,MRI>"=="        { RTOKEN(EQ);}
203 <BOTH,SCRIPT,EXPRESSION,MRI>"!="        { RTOKEN(NE);}
204 <BOTH,SCRIPT,EXPRESSION,MRI>">="        { RTOKEN(GE);}
205 <BOTH,SCRIPT,EXPRESSION,MRI>"<="        { RTOKEN(LE);}
206 <BOTH,SCRIPT,EXPRESSION,MRI>"<<"        { RTOKEN(LSHIFT);}
207 <BOTH,SCRIPT,EXPRESSION,MRI>">>"        { RTOKEN(RSHIFT);}
208 <BOTH,SCRIPT,EXPRESSION,MRI>"+="        { RTOKEN(PLUSEQ);}
209 <BOTH,SCRIPT,EXPRESSION,MRI>"-="        { RTOKEN(MINUSEQ);}
210 <BOTH,SCRIPT,EXPRESSION,MRI>"*="        { RTOKEN(MULTEQ);}
211 <BOTH,SCRIPT,EXPRESSION,MRI>"/="        { RTOKEN(DIVEQ);}
212 <BOTH,SCRIPT,EXPRESSION,MRI>"&="        { RTOKEN(ANDEQ);}
213 <BOTH,SCRIPT,EXPRESSION,MRI>"|="        { RTOKEN(OREQ);}
214 <BOTH,SCRIPT,EXPRESSION,MRI>"&&"        { RTOKEN(ANDAND);}
215 <BOTH,SCRIPT,EXPRESSION,MRI>">"         { RTOKEN('>');}
216 <BOTH,SCRIPT,EXPRESSION,MRI>","         { RTOKEN(',');}
217 <BOTH,SCRIPT,EXPRESSION,MRI>"&"         { RTOKEN('&');}
218 <BOTH,SCRIPT,EXPRESSION,MRI>"|"         { RTOKEN('|');}
219 <BOTH,SCRIPT,EXPRESSION,MRI>"~"         { RTOKEN('~');}
220 <BOTH,SCRIPT,EXPRESSION,MRI>"!"         { RTOKEN('!');}
221 <BOTH,SCRIPT,EXPRESSION,MRI>"?"         { RTOKEN('?');}
222 <BOTH,SCRIPT,EXPRESSION,MRI>"*"         { RTOKEN('*');}
223 <BOTH,SCRIPT,EXPRESSION,MRI>"+"         { RTOKEN('+');}
224 <BOTH,SCRIPT,EXPRESSION,MRI>"-"         { RTOKEN('-');}
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>"MEMORY"           { RTOKEN(MEMORY);}
236 <BOTH,SCRIPT>"ORIGIN"           { RTOKEN(ORIGIN);}
237 <BOTH,SCRIPT>"VERSION"          { RTOKEN(VERSIONK);}
238 <EXPRESSION,BOTH,SCRIPT>"BLOCK"         { RTOKEN(BLOCK);}
239 <EXPRESSION,BOTH,SCRIPT>"BIND"          { RTOKEN(BIND);}
240 <BOTH,SCRIPT>"LENGTH"           { RTOKEN(LENGTH);}
241 <EXPRESSION,BOTH,SCRIPT>"ALIGN"                 { RTOKEN(ALIGN_K);}
242 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_ALIGN"    { RTOKEN(DATA_SEGMENT_ALIGN);}
243 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_END"      { RTOKEN(DATA_SEGMENT_END);}
244 <EXPRESSION,BOTH,SCRIPT>"ADDR"                  { RTOKEN(ADDR);}
245 <EXPRESSION,BOTH,SCRIPT>"LOADADDR"              { RTOKEN(LOADADDR);}
246 <EXPRESSION,BOTH>"MAX"                  { RTOKEN(MAX_K); }
247 <EXPRESSION,BOTH>"MIN"                  { RTOKEN(MIN_K); }
248 <EXPRESSION,BOTH>"ASSERT"               { RTOKEN(ASSERT_K); }
249 <BOTH,SCRIPT>"ENTRY"                    { RTOKEN(ENTRY);}
250 <BOTH,SCRIPT,MRI>"EXTERN"               { RTOKEN(EXTERN);}
251 <EXPRESSION,BOTH,SCRIPT>"NEXT"                  { RTOKEN(NEXT);}
252 <EXPRESSION,BOTH,SCRIPT>"sizeof_headers"        { RTOKEN(SIZEOF_HEADERS);}
253 <EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS"        { RTOKEN(SIZEOF_HEADERS);}
254 <BOTH,SCRIPT>"MAP"                      { RTOKEN(MAP);}
255 <EXPRESSION,BOTH,SCRIPT>"SIZEOF"                { RTOKEN(SIZEOF);}
256 <BOTH,SCRIPT>"TARGET"           { RTOKEN(TARGET_K);}
257 <BOTH,SCRIPT>"SEARCH_DIR"               { RTOKEN(SEARCH_DIR);}
258 <BOTH,SCRIPT>"OUTPUT"           { RTOKEN(OUTPUT);}
259 <BOTH,SCRIPT>"INPUT"                    { RTOKEN(INPUT);}
260 <EXPRESSION,BOTH,SCRIPT>"GROUP"         { RTOKEN(GROUP);}
261 <EXPRESSION,BOTH,SCRIPT>"DEFINED"               { RTOKEN(DEFINED);}
262 <BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS"    { RTOKEN(CREATE_OBJECT_SYMBOLS);}
263 <BOTH,SCRIPT>"CONSTRUCTORS"             { RTOKEN( CONSTRUCTORS);}
264 <BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION" { RTOKEN(FORCE_COMMON_ALLOCATION);}
265 <BOTH,SCRIPT>"INHIBIT_COMMON_ALLOCATION" { RTOKEN(INHIBIT_COMMON_ALLOCATION);}
266 <BOTH,SCRIPT>"SECTIONS"         { RTOKEN(SECTIONS);}
267 <BOTH,SCRIPT>"FILL"                     { RTOKEN(FILL);}
268 <BOTH,SCRIPT>"STARTUP"          { RTOKEN(STARTUP);}
269 <BOTH,SCRIPT>"OUTPUT_FORMAT"            { RTOKEN(OUTPUT_FORMAT);}
270 <BOTH,SCRIPT>"OUTPUT_ARCH"              { RTOKEN( OUTPUT_ARCH);}
271 <BOTH,SCRIPT>"HLL"                      { RTOKEN(HLL);}
272 <BOTH,SCRIPT>"SYSLIB"           { RTOKEN(SYSLIB);}
273 <BOTH,SCRIPT>"FLOAT"                    { RTOKEN(FLOAT);}
274 <BOTH,SCRIPT>"QUAD"                     { RTOKEN( QUAD);}
275 <BOTH,SCRIPT>"SQUAD"                    { RTOKEN( SQUAD);}
276 <BOTH,SCRIPT>"LONG"                     { RTOKEN( LONG);}
277 <BOTH,SCRIPT>"SHORT"                    { RTOKEN( SHORT);}
278 <BOTH,SCRIPT>"BYTE"                     { RTOKEN( BYTE);}
279 <BOTH,SCRIPT>"NOFLOAT"          { RTOKEN(NOFLOAT);}
280 <EXPRESSION,BOTH,SCRIPT>"NOCROSSREFS"   { RTOKEN(NOCROSSREFS);}
281 <BOTH,SCRIPT>"OVERLAY"                  { RTOKEN(OVERLAY); }
282 <BOTH,SCRIPT>"SORT"                     { RTOKEN(SORT); }
283 <EXPRESSION,BOTH,SCRIPT>"NOLOAD"        { RTOKEN(NOLOAD);}
284 <EXPRESSION,BOTH,SCRIPT>"DSECT"         { RTOKEN(DSECT);}
285 <EXPRESSION,BOTH,SCRIPT>"COPY"          { RTOKEN(COPY);}
286 <EXPRESSION,BOTH,SCRIPT>"INFO"          { RTOKEN(INFO);}
287 <EXPRESSION,BOTH,SCRIPT>"OVERLAY"       { RTOKEN(OVERLAY);}
288 <BOTH,SCRIPT>"o"                        { RTOKEN(ORIGIN);}
289 <BOTH,SCRIPT>"org"                      { RTOKEN(ORIGIN);}
290 <BOTH,SCRIPT>"l"                        { RTOKEN( LENGTH);}
291 <BOTH,SCRIPT>"len"                      { RTOKEN( LENGTH);}
292 <BOTH,SCRIPT>"INCLUDE"                  { RTOKEN(INCLUDE);}
293 <BOTH,SCRIPT>"PHDRS"                    { RTOKEN (PHDRS); }
294 <EXPRESSION,BOTH,SCRIPT>"AT"                    { RTOKEN(AT);}
295 <EXPRESSION,BOTH,SCRIPT>"PROVIDE"               { RTOKEN(PROVIDE); }
296 <EXPRESSION,BOTH,SCRIPT>"KEEP"          { RTOKEN(KEEP); }
297 <EXPRESSION,BOTH,SCRIPT>"EXCLUDE_FILE"        { RTOKEN(EXCLUDE_FILE); }
298 <MRI>"#".*\n?                   { ++ lineno; }
299 <MRI>"\n"                       { ++ lineno;  RTOKEN(NEWLINE); }
300 <MRI>"*".*                      { /* Mri comment line */ }
301 <MRI>";".*                      { /* Mri comment line */ }
302 <MRI>"END"                      { RTOKEN(ENDWORD); }
303 <MRI>"ALIGNMOD"         { RTOKEN(ALIGNMOD);}
304 <MRI>"ALIGN"            { RTOKEN(ALIGN_K);}
305 <MRI>"CHIP"                     { RTOKEN(CHIP); }
306 <MRI>"BASE"                     { RTOKEN(BASE); }
307 <MRI>"ALIAS"                     { RTOKEN(ALIAS); }
308 <MRI>"TRUNCATE"                     { RTOKEN(TRUNCATE); }
309 <MRI>"LOAD"                     { RTOKEN(LOAD); }
310 <MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
311 <MRI>"ORDER"                    { RTOKEN(ORDER); }
312 <MRI>"NAME"                     { RTOKEN(NAMEWORD); }
313 <MRI>"FORMAT"                   { RTOKEN(FORMAT); }
314 <MRI>"CASE"                     { RTOKEN(CASE); }
315 <MRI>"START"                    { RTOKEN(START); }
316 <MRI>"LIST".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
317 <MRI>"SECT"                     { RTOKEN(SECT); }
318 <EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE"                  { RTOKEN(ABSOLUTE); }
319 <MRI>"end"                      { RTOKEN(ENDWORD); }
320 <MRI>"alignmod"         { RTOKEN(ALIGNMOD);}
321 <MRI>"align"            { RTOKEN(ALIGN_K);}
322 <MRI>"chip"                     { RTOKEN(CHIP); }
323 <MRI>"base"                     { RTOKEN(BASE); }
324 <MRI>"alias"                     { RTOKEN(ALIAS); }
325 <MRI>"truncate"                     { RTOKEN(TRUNCATE); }
326 <MRI>"load"                     { RTOKEN(LOAD); }
327 <MRI>"public"                   { RTOKEN(PUBLIC); }
328 <MRI>"order"                    { RTOKEN(ORDER); }
329 <MRI>"name"                     { RTOKEN(NAMEWORD); }
330 <MRI>"format"                   { RTOKEN(FORMAT); }
331 <MRI>"case"                     { RTOKEN(CASE); }
332 <MRI>"extern"                   { RTOKEN(EXTERN); }
333 <MRI>"start"                    { RTOKEN(START); }
334 <MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
335 <MRI>"sect"                     { RTOKEN(SECT); }
336 <EXPRESSION,BOTH,SCRIPT,MRI>"absolute"                  { RTOKEN(ABSOLUTE); }
337
338 <MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*  {
339 /* Filename without commas, needed to parse mri stuff */
340                                  yylval.name = xstrdup(yytext); 
341                                   return NAME;
342                                 }
343
344
345 <BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}* {
346                                  yylval.name = xstrdup(yytext); 
347                                   return NAME;
348                                 }
349 <BOTH,EXPRESSION>"-l"{FILENAMECHAR}+ {
350                                   yylval.name = xstrdup (yytext + 2);
351                                   return LNAME;
352                                 }
353 <SCRIPT>{WILDCHAR}* {
354                 /* Annoyingly, this pattern can match comments, and we have
355                    longest match issues to consider.  So if the first two
356                    characters are a comment opening, put the input back and
357                    try again.  */
358                 if (yytext[0] == '/' && yytext[1] == '*')
359                   {
360                     yyless(2);
361                     comment ();
362                   }
363                 else
364                   {
365                     yylval.name = xstrdup(yytext);
366                     return NAME;
367                   }
368         }
369
370 <EXPRESSION,BOTH,SCRIPT,VERS_NODE>"\""[^\"]*"\"" {
371                                         /* No matter the state, quotes
372                                            give what's inside */
373                                         yylval.name = xstrdup(yytext+1);
374                                         yylval.name[yyleng-2] = 0;
375                                         return NAME;
376                                 }
377 <BOTH,SCRIPT,EXPRESSION>"\n"            { lineno++;}
378 <MRI,BOTH,SCRIPT,EXPRESSION>[ \t\r]+    { }
379
380 <VERS_NODE,VERS_SCRIPT>[:,;]    { return *yytext; }
381
382 <VERS_NODE>global               { RTOKEN(GLOBAL); }
383
384 <VERS_NODE>local                { RTOKEN(LOCAL); }
385
386 <VERS_NODE>extern               { RTOKEN(EXTERN); }
387
388 <VERS_NODE>{V_IDENTIFIER}       { yylval.name = xstrdup (yytext);
389                                   return VERS_IDENTIFIER; }
390
391 <VERS_SCRIPT>{V_TAG}            { yylval.name = xstrdup (yytext);
392                                   return VERS_TAG; }
393
394 <VERS_START>"{"                 { BEGIN(VERS_SCRIPT); return *yytext; }
395
396 <VERS_SCRIPT>"{"                { BEGIN(VERS_NODE); 
397                                   vers_node_nesting = 0;
398                                   return *yytext;
399                                 }
400 <VERS_SCRIPT>"}"                { return *yytext; }
401 <VERS_NODE>"{"                  { vers_node_nesting++; return *yytext; }
402 <VERS_NODE>"}"                  { if (--vers_node_nesting < 0)
403                                     BEGIN(VERS_SCRIPT);
404                                   return *yytext;
405                                 }
406
407 <VERS_START,VERS_NODE,VERS_SCRIPT>[\n]          { lineno++; }
408
409 <VERS_START,VERS_NODE,VERS_SCRIPT>#.*           { /* Eat up comments */ }
410
411 <VERS_START,VERS_NODE,VERS_SCRIPT>[ \t\r]+      { /* Eat up whitespace */ }
412
413 <<EOF>> {
414   include_stack_ptr--;
415     
416   if (include_stack_ptr == 0) 
417   {
418     yyterminate();
419   }
420   else 
421   {
422     yy_switch_to_buffer(include_stack[include_stack_ptr]);
423   }
424
425   ldfile_input_filename = file_name_stack[include_stack_ptr - 1];
426   lineno = lineno_stack[include_stack_ptr];
427
428   return END;
429 }
430
431 <SCRIPT,MRI,VERS_START,VERS_SCRIPT,VERS_NODE>.  lex_warn_invalid(" in script", yytext);
432 <EXPRESSION,DEFSYMEXP,BOTH>.    lex_warn_invalid(" in expression", yytext);
433     
434 %%
435 \f
436
437 /* Switch flex to reading script file NAME, open on FILE,
438    saving the current input info on the include stack.  */
439
440 void
441 lex_push_file (file, name)
442      FILE *file;
443      const char *name;
444 {
445   if (include_stack_ptr >= MAX_INCLUDE_DEPTH) 
446     {
447       einfo("%F:includes nested too deeply\n");
448     }
449   file_name_stack[include_stack_ptr] = name;
450   lineno_stack[include_stack_ptr] = lineno;
451   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
452
453   include_stack_ptr++;
454   lineno = 1;
455   yyin = file;
456   yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
457 }
458
459 /* Return a newly created flex input buffer containing STRING,
460    which is SIZE bytes long.  */
461
462 static YY_BUFFER_STATE 
463 yy_create_string_buffer (string, size)
464      CONST char *string;
465      size_t size;
466 {
467   YY_BUFFER_STATE b;
468
469   /* Calls to m-alloc get turned by sed into xm-alloc.  */
470   b = (YY_BUFFER_STATE) malloc (sizeof (struct yy_buffer_state));
471   b->yy_input_file = 0;
472   b->yy_buf_size = size;
473
474   /* yy_ch_buf has to be 2 characters longer than the size given because
475      we need to put in 2 end-of-buffer characters.  */
476   b->yy_ch_buf = (char *) malloc ((unsigned) (b->yy_buf_size + 3));
477
478   b->yy_ch_buf[0] = '\n';
479   strcpy (b->yy_ch_buf+1, string);
480   b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
481   b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
482   b->yy_n_chars = size+1;
483   b->yy_buf_pos = &b->yy_ch_buf[1];
484
485   b->yy_is_our_buffer = 1;
486   b->yy_is_interactive = 0;
487   b->yy_at_bol = 1;
488   b->yy_fill_buffer = 0;
489
490   /* flex 2.4.7 changed the interface.  FIXME: We should not be using
491      a flex internal interface in the first place!  */
492 #ifdef YY_BUFFER_NEW
493   b->yy_buffer_status = YY_BUFFER_NEW;
494 #else
495   b->yy_eof_status = EOF_NOT_SEEN;
496 #endif
497
498   return b;
499 }
500
501 /* Switch flex to reading from STRING, saving the current input info
502    on the include stack.  */
503
504 void
505 lex_redirect (string)
506      CONST char *string;
507 {
508   YY_BUFFER_STATE tmp;
509
510   yy_init = 0;
511   if (include_stack_ptr >= MAX_INCLUDE_DEPTH) 
512     {
513       einfo("%F: macros nested too deeply\n");
514     }
515   file_name_stack[include_stack_ptr] = "redirect";
516   lineno_stack[include_stack_ptr] = lineno;
517   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
518   include_stack_ptr++;
519   lineno = 1;
520   tmp = yy_create_string_buffer (string, strlen (string));
521   yy_switch_to_buffer (tmp);
522 }
523 \f
524 /* Functions to switch to a different flex start condition,
525    saving the current start condition on `state_stack'.  */
526
527 static int state_stack[MAX_INCLUDE_DEPTH * 2];
528 static int *state_stack_p = state_stack;
529
530 void
531 ldlex_script ()
532 {
533   *(state_stack_p)++ = yy_start;
534   BEGIN (SCRIPT);
535 }
536
537 void
538 ldlex_mri_script ()
539 {
540   *(state_stack_p)++ = yy_start;
541   BEGIN (MRI);
542 }
543
544 void
545 ldlex_version_script ()
546 {
547   *(state_stack_p)++ = yy_start;
548   BEGIN (VERS_START);
549 }
550
551 void
552 ldlex_version_file ()
553 {
554   *(state_stack_p)++ = yy_start;
555   BEGIN (VERS_SCRIPT);
556 }
557
558 void
559 ldlex_defsym ()
560 {
561   *(state_stack_p)++ = yy_start;
562   BEGIN (DEFSYMEXP);
563 }
564            
565 void
566 ldlex_expression ()
567 {
568   *(state_stack_p)++ = yy_start;
569   BEGIN (EXPRESSION);
570 }
571
572 void
573 ldlex_both ()
574 {
575   *(state_stack_p)++ = yy_start;
576   BEGIN (BOTH);
577 }
578
579 void
580 ldlex_popstate ()
581 {
582   yy_start = *(--state_stack_p);
583 }
584 \f
585
586 /* Place up to MAX_SIZE characters in BUF and return in *RESULT
587    either the number of characters read, or 0 to indicate EOF.  */
588
589 static void
590 yy_input (buf, result, max_size)
591      char *buf;
592      int *result;
593      int max_size;
594 {
595   *result = 0; 
596   if (yy_current_buffer->yy_input_file)
597     {
598       if (yyin)
599         {
600           *result = fread ((char *) buf, 1, max_size, yyin);
601           if (*result < max_size && ferror (yyin)) 
602             einfo ("%F%P: read in flex scanner failed\n");
603         }
604     }
605 }
606
607 /* Eat the rest of a C-style comment.  */
608
609 static void
610 comment ()
611 {
612   int c;
613
614   while (1)
615   {
616     c = input();
617     while (c != '*' && c != EOF) 
618     {
619       if (c == '\n')
620         lineno++;
621       c = input();
622     }
623
624     if (c == '*')
625     {
626       c = input();
627       while (c == '*')
628        c = input();
629       if (c == '/')
630        break;                   /* found the end */
631     }
632
633     if (c == '\n')
634       lineno++;
635
636     if (c == EOF)
637     {
638       einfo( "%F%P: EOF in comment\n");
639       break;
640     }
641   }
642 }
643
644 /* Warn the user about a garbage character WHAT in the input
645    in context WHERE.  */
646
647 static void
648 lex_warn_invalid (where, what)
649      char *where, *what;
650 {
651   char buf[5];
652
653   /* If we have found an input file whose format we do not recognize,
654      and we are therefore treating it as a linker script, and we find
655      an invalid character, then most likely this is a real object file
656      of some different format.  Treat it as such.  */
657   if (ldfile_assumed_script)
658     {
659       bfd_set_error (bfd_error_file_not_recognized);
660       einfo ("%F%s: file not recognized: %E\n", ldfile_input_filename);
661     }
662
663   if (! ISPRINT (*what))
664     {
665       sprintf (buf, "\\%03o", (unsigned int) *what);
666       what = buf;
667     }
668
669   einfo ("%P:%S: ignoring invalid character `%s'%s\n", what, where);
670 }