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/*
25This 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.  */
45input_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?)  */
49unsigned int lineno = 1;
50
51/* The string we are currently lexing, or NULL if we are reading a
52   file.  */
53const 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 MAX_INCLUDE_DEPTH 10
67static YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
68static const char *file_name_stack[MAX_INCLUDE_DEPTH];
69static unsigned int lineno_stack[MAX_INCLUDE_DEPTH];
70static unsigned int include_stack_ptr = 0;
71static int vers_node_nesting = 0;
72
73static void yy_input (char *, yy_size_t *, yy_size_t);
74static void comment (void);
75static void lex_warn_invalid (char *where, char *what);
76
77/* STATES
78	EXPRESSION	definitely in an expression
79	SCRIPT		definitely in a script
80	BOTH		either EXPRESSION or SCRIPT
81	DEFSYMEXP	in an argument to -defsym
82        MRI             in an MRI script
83	VERS_START	starting a Sun style mapfile
84	VERS_SCRIPT	a Sun style mapfile
85	VERS_NODE	a node within a Sun style mapfile
86*/
87#define RTOKEN(x)  {  yylval.token = x; return x; }
88
89/* Some versions of flex want this.  */
90#ifndef yywrap
91int yywrap (void) { return 1; }
92#endif
93%}
94
95%option nounput
96
97%a 4000
98%o 5000
99
100CMDFILENAMECHAR   [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
101CMDFILENAMECHAR1  [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
102FILENAMECHAR1	[_a-zA-Z\/\.\\\$\_\~]
103SYMBOLCHARN     [_a-zA-Z\/\.\\\$\_\~0-9]
104FILENAMECHAR	[_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
105WILDCHAR	[_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~\?\*]
106WHITE		[ \t\n\r]+
107
108NOCFILENAMECHAR	[_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
109
110V_TAG [.$_a-zA-Z][._a-zA-Z0-9]*
111V_IDENTIFIER [*?.$_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,SCRIPT>"ALIGNOF"	{ RTOKEN(ALIGNOF); }
258<EXPRESSION,BOTH>"MAX"			{ RTOKEN(MAX_K); }
259<EXPRESSION,BOTH>"MIN"			{ RTOKEN(MIN_K); }
260<EXPRESSION,BOTH,SCRIPT>"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>"PROVIDE_HIDDEN" { RTOKEN(PROVIDE_HIDDEN); }
317<EXPRESSION,BOTH,SCRIPT>"KEEP"		{ RTOKEN(KEEP); }
318<EXPRESSION,BOTH,SCRIPT>"EXCLUDE_FILE"  { RTOKEN(EXCLUDE_FILE); }
319<EXPRESSION,BOTH,SCRIPT>"CONSTANT"	{ RTOKEN(CONSTANT);}
320<MRI>"#".*\n?			{ ++ lineno; }
321<MRI>"\n"	                { ++ lineno;  RTOKEN(NEWLINE); }
322<MRI>"*".*			{ /* Mri comment line */ }
323<MRI>";".*			{ /* Mri comment line */ }
324<MRI>"END"                      { RTOKEN(ENDWORD); }
325<MRI>"ALIGNMOD"			{ RTOKEN(ALIGNMOD);}
326<MRI>"ALIGN"			{ RTOKEN(ALIGN_K);}
327<MRI>"CHIP"                     { RTOKEN(CHIP); }
328<MRI>"BASE"                     { RTOKEN(BASE); }
329<MRI>"ALIAS"                    { RTOKEN(ALIAS); }
330<MRI>"TRUNCATE"                 { RTOKEN(TRUNCATE); }
331<MRI>"LOAD"                     { RTOKEN(LOAD); }
332<MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
333<MRI>"ORDER"                    { RTOKEN(ORDER); }
334<MRI>"NAME"                     { RTOKEN(NAMEWORD); }
335<MRI>"FORMAT"                   { RTOKEN(FORMAT); }
336<MRI>"CASE"                     { RTOKEN(CASE); }
337<MRI>"START"                    { RTOKEN(START); }
338<MRI>"LIST".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
339<MRI>"SECT"			{ RTOKEN(SECT); }
340<EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE"			{ RTOKEN(ABSOLUTE); }
341<MRI>"end"                      { RTOKEN(ENDWORD); }
342<MRI>"alignmod"			{ RTOKEN(ALIGNMOD);}
343<MRI>"align"			{ RTOKEN(ALIGN_K);}
344<MRI>"chip"                     { RTOKEN(CHIP); }
345<MRI>"base"                     { RTOKEN(BASE); }
346<MRI>"alias"                    { RTOKEN(ALIAS); }
347<MRI>"truncate"                 { RTOKEN(TRUNCATE); }
348<MRI>"load"                     { RTOKEN(LOAD); }
349<MRI>"public"                   { RTOKEN(PUBLIC); }
350<MRI>"order"                    { RTOKEN(ORDER); }
351<MRI>"name"                     { RTOKEN(NAMEWORD); }
352<MRI>"format"                   { RTOKEN(FORMAT); }
353<MRI>"case"                     { RTOKEN(CASE); }
354<MRI>"extern"                   { RTOKEN(EXTERN); }
355<MRI>"start"                    { RTOKEN(START); }
356<MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
357<MRI>"sect"			{ RTOKEN(SECT); }
358<EXPRESSION,BOTH,SCRIPT,MRI>"absolute"			{ RTOKEN(ABSOLUTE); }
359
360<MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*	{
361/* Filename without commas, needed to parse mri stuff */
362				 yylval.name = xstrdup (yytext);
363				  return NAME;
364				}
365
366
367<BOTH>{FILENAMECHAR1}{FILENAMECHAR}*	{
368				 yylval.name = xstrdup (yytext);
369				  return NAME;
370				}
371<BOTH>"-l"{FILENAMECHAR}+ {
372				  yylval.name = xstrdup (yytext + 2);
373				  return LNAME;
374				}
375<EXPRESSION>{FILENAMECHAR1}{NOCFILENAMECHAR}*	{
376				 yylval.name = xstrdup (yytext);
377				  return NAME;
378				}
379<EXPRESSION>"-l"{NOCFILENAMECHAR}+ {
380				  yylval.name = xstrdup (yytext + 2);
381				  return LNAME;
382				}
383<SCRIPT>{WILDCHAR}* {
384		/* Annoyingly, this pattern can match comments, and we have
385		   longest match issues to consider.  So if the first two
386		   characters are a comment opening, put the input back and
387		   try again.  */
388		if (yytext[0] == '/' && yytext[1] == '*')
389		  {
390		    yyless (2);
391		    comment ();
392		  }
393		else
394		  {
395		    yylval.name = xstrdup (yytext);
396		    return NAME;
397		  }
398	}
399
400<EXPRESSION,BOTH,SCRIPT,VERS_NODE>"\""[^\"]*"\"" {
401					/* No matter the state, quotes
402					   give what's inside */
403					yylval.name = xstrdup (yytext + 1);
404					yylval.name[yyleng - 2] = 0;
405					return NAME;
406				}
407<BOTH,SCRIPT,EXPRESSION>"\n"		{ lineno++;}
408<MRI,BOTH,SCRIPT,EXPRESSION>[ \t\r]+	{ }
409
410<VERS_NODE,VERS_SCRIPT>[:,;]	{ return *yytext; }
411
412<VERS_NODE>global		{ RTOKEN(GLOBAL); }
413
414<VERS_NODE>local		{ RTOKEN(LOCAL); }
415
416<VERS_NODE>extern		{ RTOKEN(EXTERN); }
417
418<VERS_NODE>{V_IDENTIFIER}	{ yylval.name = xstrdup (yytext);
419				  return VERS_IDENTIFIER; }
420
421<VERS_SCRIPT>{V_TAG}		{ yylval.name = xstrdup (yytext);
422				  return VERS_TAG; }
423
424<VERS_START>"{"			{ BEGIN(VERS_SCRIPT); return *yytext; }
425
426<VERS_SCRIPT>"{"		{ BEGIN(VERS_NODE);
427				  vers_node_nesting = 0;
428				  return *yytext;
429				}
430<VERS_SCRIPT>"}"		{ return *yytext; }
431<VERS_NODE>"{"			{ vers_node_nesting++; return *yytext; }
432<VERS_NODE>"}"			{ if (--vers_node_nesting < 0)
433				    BEGIN(VERS_SCRIPT);
434				  return *yytext;
435				}
436
437<VERS_START,VERS_NODE,VERS_SCRIPT>[\n]		{ lineno++; }
438
439<VERS_START,VERS_NODE,VERS_SCRIPT>#.*		{ /* Eat up comments */ }
440
441<VERS_START,VERS_NODE,VERS_SCRIPT>[ \t\r]+   	{ /* Eat up whitespace */ }
442
443<<EOF>> {
444  include_stack_ptr--;
445
446  if (include_stack_ptr == 0)
447  {
448    yyterminate ();
449  }
450  else
451  {
452    yy_switch_to_buffer (include_stack[include_stack_ptr]);
453  }
454
455  ldfile_input_filename = file_name_stack[include_stack_ptr - 1];
456  lineno = lineno_stack[include_stack_ptr];
457
458  return END;
459}
460
461<SCRIPT,MRI,VERS_START,VERS_SCRIPT,VERS_NODE>.	lex_warn_invalid (" in script", yytext);
462<EXPRESSION,DEFSYMEXP,BOTH>.	lex_warn_invalid (" in expression", yytext);
463
464%%
465
466
467/* Switch flex to reading script file NAME, open on FILE,
468   saving the current input info on the include stack.  */
469
470void
471lex_push_file (FILE *file, const char *name)
472{
473  if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
474    {
475      einfo ("%F:includes nested too deeply\n");
476    }
477  file_name_stack[include_stack_ptr] = name;
478  lineno_stack[include_stack_ptr] = lineno;
479  include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
480
481  include_stack_ptr++;
482  lineno = 1;
483  yyin = file;
484  yy_switch_to_buffer (yy_create_buffer (yyin, YY_BUF_SIZE));
485}
486
487/* Return a newly created flex input buffer containing STRING,
488   which is SIZE bytes long.  */
489
490static YY_BUFFER_STATE
491yy_create_string_buffer (const char *string, size_t size)
492{
493  YY_BUFFER_STATE b;
494
495  /* Calls to m-alloc get turned by sed into xm-alloc.  */
496  b = malloc (sizeof (struct yy_buffer_state));
497  b->yy_input_file = 0;
498  b->yy_buf_size = size;
499
500  /* yy_ch_buf has to be 2 characters longer than the size given because
501     we need to put in 2 end-of-buffer characters.  */
502  b->yy_ch_buf = malloc ((unsigned) (b->yy_buf_size + 3));
503
504  b->yy_ch_buf[0] = '\n';
505  strcpy (b->yy_ch_buf+1, string);
506  b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
507  b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
508  b->yy_n_chars = size+1;
509  b->yy_buf_pos = &b->yy_ch_buf[1];
510
511  b->yy_is_our_buffer = 1;
512  b->yy_is_interactive = 0;
513  b->yy_at_bol = 1;
514  b->yy_fill_buffer = 0;
515
516  /* flex 2.4.7 changed the interface.  FIXME: We should not be using
517     a flex internal interface in the first place!  */
518#ifdef YY_BUFFER_NEW
519  b->yy_buffer_status = YY_BUFFER_NEW;
520#else
521  b->yy_eof_status = EOF_NOT_SEEN;
522#endif
523
524  return b;
525}
526
527/* Switch flex to reading from STRING, saving the current input info
528   on the include stack.  */
529
530void
531lex_redirect (const char *string)
532{
533  YY_BUFFER_STATE tmp;
534
535  yy_init = 0;
536  if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
537    {
538      einfo("%F: macros nested too deeply\n");
539    }
540  file_name_stack[include_stack_ptr] = "redirect";
541  lineno_stack[include_stack_ptr] = lineno;
542  include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
543  include_stack_ptr++;
544  lineno = 1;
545  tmp = yy_create_string_buffer (string, strlen (string));
546  yy_switch_to_buffer (tmp);
547}
548
549/* Functions to switch to a different flex start condition,
550   saving the current start condition on `state_stack'.  */
551
552static int state_stack[MAX_INCLUDE_DEPTH * 2];
553static int *state_stack_p = state_stack;
554
555void
556ldlex_script (void)
557{
558  *(state_stack_p)++ = yy_start;
559  BEGIN (SCRIPT);
560}
561
562void
563ldlex_mri_script (void)
564{
565  *(state_stack_p)++ = yy_start;
566  BEGIN (MRI);
567}
568
569void
570ldlex_version_script (void)
571{
572  *(state_stack_p)++ = yy_start;
573  BEGIN (VERS_START);
574}
575
576void
577ldlex_version_file (void)
578{
579  *(state_stack_p)++ = yy_start;
580  BEGIN (VERS_SCRIPT);
581}
582
583void
584ldlex_defsym (void)
585{
586  *(state_stack_p)++ = yy_start;
587  BEGIN (DEFSYMEXP);
588}
589
590void
591ldlex_expression (void)
592{
593  *(state_stack_p)++ = yy_start;
594  BEGIN (EXPRESSION);
595}
596
597void
598ldlex_both (void)
599{
600  *(state_stack_p)++ = yy_start;
601  BEGIN (BOTH);
602}
603
604void
605ldlex_popstate (void)
606{
607  yy_start = *(--state_stack_p);
608}
609
610
611/* Place up to MAX_SIZE characters in BUF and return in *RESULT
612   either the number of characters read, or 0 to indicate EOF.  */
613
614static void
615yy_input (char *buf, yy_size_t *result, yy_size_t max_size)
616{
617  *result = 0;
618  if (YY_CURRENT_BUFFER->yy_input_file)
619    {
620      if (yyin)
621	{
622	  *result = fread (buf, 1, max_size, yyin);
623	  if (*result < max_size && ferror (yyin))
624	    einfo ("%F%P: read in flex scanner failed\n");
625	}
626    }
627}
628
629/* Eat the rest of a C-style comment.  */
630
631static void
632comment (void)
633{
634  int c;
635
636  while (1)
637  {
638    c = input();
639    while (c != '*' && c != EOF)
640    {
641      if (c == '\n')
642	lineno++;
643      c = input();
644    }
645
646    if (c == '*')
647    {
648      c = input();
649      while (c == '*')
650       c = input();
651      if (c == '/')
652       break;			/* found the end */
653    }
654
655    if (c == '\n')
656      lineno++;
657
658    if (c == EOF)
659    {
660      einfo( "%F%P: EOF in comment\n");
661      break;
662    }
663  }
664}
665
666/* Warn the user about a garbage character WHAT in the input
667   in context WHERE.  */
668
669static void
670lex_warn_invalid (char *where, char *what)
671{
672  char buf[5];
673
674  /* If we have found an input file whose format we do not recognize,
675     and we are therefore treating it as a linker script, and we find
676     an invalid character, then most likely this is a real object file
677     of some different format.  Treat it as such.  */
678  if (ldfile_assumed_script)
679    {
680      bfd_set_error (bfd_error_file_not_recognized);
681      einfo ("%F%s: file not recognized: %E\n", ldfile_input_filename);
682    }
683
684  if (! ISPRINT (*what))
685    {
686      sprintf (buf, "\\%03o", (unsigned int) *what);
687      what = buf;
688    }
689
690  einfo ("%P:%S: ignoring invalid character `%s'%s\n", what, where);
691}
692