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 "bfdlink.h"
  41 #include "ld.h"
  42 #include "ldmisc.h"
  43 #include "ldexp.h"
  44 #include "ldlang.h"
  45 #include <ldgram.h>
  46 #include "ldfile.h"
  47 #include "ldlex.h"
  48 #include "ldmain.h"
  49 #include "libiberty.h"
  50
  51 /* The type of top-level parser input.
  52    yylex and yyparse (indirectly) both check this.  */
  53 input_type parser_input;
  54
  55 /* Line number in the current input file.
  56    (FIXME Actually, it doesn't appear to get reset for each file?)  */
  57 unsigned int lineno = 1;
  58
  59 /* The string we are currently lexing, or NULL if we are reading a
  60    file.  */
  61 const char *lex_string = NULL;
  62
  63 /* Support for flex reading from more than one input file (stream).
  64    `include_stack' is flex's input state for each open file;
  65    `file_name_stack' is the file names.  `lineno_stack' is the current
  66    line numbers.
  67
  68    If `include_stack_ptr' is 0, we haven't started reading anything yet.
  69    Otherwise, stack elements 0 through `include_stack_ptr - 1' are valid.  */
  70
  71 #undef YY_INPUT
  72 #define YY_INPUT(buf,result,max_size) yy_input(buf, &result, max_size)
  73
  74 #define MAX_INCLUDE_DEPTH 10
  75 static YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
  76 static const char *file_name_stack[MAX_INCLUDE_DEPTH];
  77 static unsigned int lineno_stack[MAX_INCLUDE_DEPTH];
  78 static unsigned int include_stack_ptr = 0;
  79 static int vers_node_nesting = 0;
  80
  81 static YY_BUFFER_STATE yy_create_string_buffer PARAMS ((const char *string,
  82                                                         size_t size));
  83 static void yy_input PARAMS ((char *, int *result, int max_size));
  84
  85 static void comment PARAMS ((void));
  86 static void lex_warn_invalid PARAMS ((char *where, char *what));
  87
  88 /* STATES
  89         EXPRESSION      definitely in an expression
  90         SCRIPT          definitely in a script
  91         BOTH            either EXPRESSION or SCRIPT
  92         DEFSYMEXP       in an argument to -defsym
  93         MRI             in an MRI script
  94         VERS_START      starting a Sun style mapfile
  95         VERS_SCRIPT     a Sun style mapfile
  96         VERS_NODE       a node within a Sun style mapfile
  97 */
  98 #define RTOKEN(x)  {  yylval.token = x; return x; }
  99
 100 /* Some versions of flex want this.  */
 101 #ifndef yywrap
 102 int yywrap () { return 1; }
 103 #endif
 104 %}
 105
 106 %a 4000
 107 %o 5000
 108
 109 CMDFILENAMECHAR   [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
 110 CMDFILENAMECHAR1  [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
 111 FILENAMECHAR1   [_a-zA-Z\/\.\\\$\_\~]
 112 SYMBOLCHARN     [_a-zA-Z\/\.\\\$\_\~0-9]
 113 FILENAMECHAR    [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
 114 WILDCHAR        [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~\?\*]
 115 WHITE           [ \t\n\r]+
 116
 117 NOCFILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
 118
 119 V_TAG [.$_a-zA-Z][._a-zA-Z0-9]*
 120 V_IDENTIFIER [*?.$_a-zA-Z\[\]\-\!\^]([*?.$_a-zA-Z0-9\[\]\-\!\^]|::)*
 121
 122 %s SCRIPT
 123 %s EXPRESSION
 124 %s BOTH
 125 %s DEFSYMEXP
 126 %s MRI
 127 %s VERS_START
 128 %s VERS_SCRIPT
 129 %s VERS_NODE
 130 %%
 131
 132   if (parser_input != input_selected)
 133     {
 134       /* The first token of the input determines the initial parser state.  */
 135       input_type t = parser_input;
 136       parser_input = input_selected;
 137       switch (t)
 138         {
 139         case input_script: return INPUT_SCRIPT; break;
 140         case input_mri_script: return INPUT_MRI_SCRIPT; break;
 141         case input_version_script: return INPUT_VERSION_SCRIPT; break;
 142         case input_defsym: return INPUT_DEFSYM; break;
 143         default: abort ();
 144         }
 145     }
 146
 147 <BOTH,SCRIPT,EXPRESSION,VERS_START,VERS_NODE,VERS_SCRIPT>"/*"   { comment(); }
 148
 149
 150 <DEFSYMEXP>"-"                  { RTOKEN('-');}
 151 <DEFSYMEXP>"+"                  { RTOKEN('+');}
 152 <DEFSYMEXP>{FILENAMECHAR1}{SYMBOLCHARN}*   { yylval.name = xstrdup(yytext); return NAME; }
 153 <DEFSYMEXP>"="                  { RTOKEN('='); }
 154
 155 <MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
 156                                 yylval.integer = bfd_scan_vma (yytext+1, 0,16);
 157                                 yylval.bigint.str = (char *) 0;
 158                                 return INT;
 159                         }
 160
 161 <MRI,EXPRESSION>([0-9A-Fa-f])+(H|h|X|x|B|b|O|o|D|d) {
 162                                    int ibase ;
 163                                    switch (yytext[yyleng-1]) {
 164                                     case 'X':
 165                                     case 'x':
 166                                     case 'H':
 167                                     case 'h':
 168                                      ibase = 16;
 169                                      break;
 170                                     case 'O':
 171                                     case 'o':
 172                                      ibase = 8;
 173                                      break;
 174                                     case 'B':
 175                                     case 'b':
 176                                      ibase = 2;
 177                                      break;
 178                                     default:
 179                                      ibase = 10;
 180                                    }
 181                                    yylval.integer = bfd_scan_vma (yytext, 0,
 182                                                                   ibase);
 183                                    yylval.bigint.str = (char *) 0;
 184                                    return INT;
 185                                  }
 186 <SCRIPT,DEFSYMEXP,MRI,BOTH,EXPRESSION>((("$"|0[xX])([0-9A-Fa-f])+)|(([0-9])+))(M|K|m|k)? {
 187                                   char *s = yytext;
 188                                   int ibase = 0;
 189
 190                                   if (*s == '$')
 191                                     {
 192                                       ++s;
 193                                       ibase = 16;
 194                                     }
 195                                   yylval.integer = bfd_scan_vma (s, 0, ibase);
 196                                   yylval.bigint.str = (char *) 0;
 197                                   if (yytext[yyleng-1] == 'M'
 198                                       || yytext[yyleng-1] == 'm')
 199                                     {
 200                                       yylval.integer *= 1024 * 1024;
 201                                     }
 202                                   else if (yytext[yyleng-1] == 'K'
 203                                       || yytext[yyleng-1]=='k')
 204                                     {
 205                                       yylval.integer *= 1024;
 206                                     }
 207                                   else if (yytext[0] == '0'
 208                                            && (yytext[1] == 'x'
 209                                                || yytext[1] == 'X'))
 210                                     {
 211                                       yylval.bigint.str = xstrdup (yytext + 2);
 212                                     }
 213                                   return INT;
 214                                 }
 215 <BOTH,SCRIPT,EXPRESSION,MRI>"]"         { RTOKEN(']');}
 216 <BOTH,SCRIPT,EXPRESSION,MRI>"["         { RTOKEN('[');}
 217 <BOTH,SCRIPT,EXPRESSION,MRI>"<<="       { RTOKEN(LSHIFTEQ);}
 218 <BOTH,SCRIPT,EXPRESSION,MRI>">>="       { RTOKEN(RSHIFTEQ);}
 219 <BOTH,SCRIPT,EXPRESSION,MRI>"||"        { RTOKEN(OROR);}
 220 <BOTH,SCRIPT,EXPRESSION,MRI>"=="        { RTOKEN(EQ);}
 221 <BOTH,SCRIPT,EXPRESSION,MRI>"!="        { RTOKEN(NE);}
 222 <BOTH,SCRIPT,EXPRESSION,MRI>">="        { RTOKEN(GE);}
 223 <BOTH,SCRIPT,EXPRESSION,MRI>"<="        { RTOKEN(LE);}
 224 <BOTH,SCRIPT,EXPRESSION,MRI>"<<"        { RTOKEN(LSHIFT);}
 225 <BOTH,SCRIPT,EXPRESSION,MRI>">>"        { RTOKEN(RSHIFT);}
 226 <BOTH,SCRIPT,EXPRESSION,MRI>"+="        { RTOKEN(PLUSEQ);}
 227 <BOTH,SCRIPT,EXPRESSION,MRI>"-="        { RTOKEN(MINUSEQ);}
 228 <BOTH,SCRIPT,EXPRESSION,MRI>"*="        { RTOKEN(MULTEQ);}
 229 <BOTH,SCRIPT,EXPRESSION,MRI>"/="        { RTOKEN(DIVEQ);}
 230 <BOTH,SCRIPT,EXPRESSION,MRI>"&="        { RTOKEN(ANDEQ);}
 231 <BOTH,SCRIPT,EXPRESSION,MRI>"|="        { RTOKEN(OREQ);}
 232 <BOTH,SCRIPT,EXPRESSION,MRI>"&&"        { RTOKEN(ANDAND);}
 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,EXPRESSION,MRI>"="          { RTOKEN('=');}
 247 <BOTH,SCRIPT,EXPRESSION,MRI>"}"                 { RTOKEN('}') ; }
 248 <BOTH,SCRIPT,EXPRESSION,MRI>"{"                 { RTOKEN('{'); }
 249 <BOTH,SCRIPT,EXPRESSION,MRI>")"                 { RTOKEN(')');}
 250 <BOTH,SCRIPT,EXPRESSION,MRI>"("                 { RTOKEN('(');}
 251 <BOTH,SCRIPT,EXPRESSION,MRI>":"         { RTOKEN(':'); }
 252 <BOTH,SCRIPT,EXPRESSION,MRI>";"         { RTOKEN(';');}
 253 <BOTH,SCRIPT>"MEMORY"           { RTOKEN(MEMORY);}
 254 <BOTH,SCRIPT>"ORIGIN"           { RTOKEN(ORIGIN);}
 255 <BOTH,SCRIPT>"VERSION"          { RTOKEN(VERSIONK);}
 256 <EXPRESSION,BOTH,SCRIPT>"BLOCK"         { RTOKEN(BLOCK);}
 257 <EXPRESSION,BOTH,SCRIPT>"BIND"          { RTOKEN(BIND);}
 258 <BOTH,SCRIPT>"LENGTH"           { RTOKEN(LENGTH);}
 259 <EXPRESSION,BOTH,SCRIPT>"ALIGN"                 { RTOKEN(ALIGN_K);}
 260 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_ALIGN"    { RTOKEN(DATA_SEGMENT_ALIGN);}
 261 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_END"      { RTOKEN(DATA_SEGMENT_END);}
 262 <EXPRESSION,BOTH,SCRIPT>"ADDR"                  { RTOKEN(ADDR);}
 263 <EXPRESSION,BOTH,SCRIPT>"LOADADDR"              { RTOKEN(LOADADDR);}
 264 <EXPRESSION,BOTH>"MAX"                  { RTOKEN(MAX_K); }
 265 <EXPRESSION,BOTH>"MIN"                  { RTOKEN(MIN_K); }
 266 <EXPRESSION,BOTH>"ASSERT"               { RTOKEN(ASSERT_K); }
 267 <BOTH,SCRIPT>"ENTRY"                    { RTOKEN(ENTRY);}
 268 <BOTH,SCRIPT,MRI>"EXTERN"               { RTOKEN(EXTERN);}
 269 <EXPRESSION,BOTH,SCRIPT>"NEXT"                  { RTOKEN(NEXT);}
 270 <EXPRESSION,BOTH,SCRIPT>"sizeof_headers"        { RTOKEN(SIZEOF_HEADERS);}
 271 <EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS"        { RTOKEN(SIZEOF_HEADERS);}
 272 <BOTH,SCRIPT>"MAP"                      { RTOKEN(MAP);}
 273 <EXPRESSION,BOTH,SCRIPT>"SIZEOF"                { RTOKEN(SIZEOF);}
 274 <BOTH,SCRIPT>"TARGET"           { RTOKEN(TARGET_K);}
 275 <BOTH,SCRIPT>"SEARCH_DIR"               { RTOKEN(SEARCH_DIR);}
 276 <BOTH,SCRIPT>"OUTPUT"           { RTOKEN(OUTPUT);}
 277 <BOTH,SCRIPT>"INPUT"                    { RTOKEN(INPUT);}
 278 <EXPRESSION,BOTH,SCRIPT>"GROUP"         { RTOKEN(GROUP);}
 279 <EXPRESSION,BOTH,SCRIPT>"DEFINED"               { RTOKEN(DEFINED);}
 280 <BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS"    { RTOKEN(CREATE_OBJECT_SYMBOLS);}
 281 <BOTH,SCRIPT>"CONSTRUCTORS"             { RTOKEN( CONSTRUCTORS);}
 282 <BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION" { RTOKEN(FORCE_COMMON_ALLOCATION);}
 283 <BOTH,SCRIPT>"INHIBIT_COMMON_ALLOCATION" { RTOKEN(INHIBIT_COMMON_ALLOCATION);}
 284 <BOTH,SCRIPT>"SECTIONS"         { RTOKEN(SECTIONS);}
 285 <BOTH,SCRIPT>"FILL"                     { RTOKEN(FILL);}
 286 <BOTH,SCRIPT>"STARTUP"          { RTOKEN(STARTUP);}
 287 <BOTH,SCRIPT>"OUTPUT_FORMAT"            { RTOKEN(OUTPUT_FORMAT);}
 288 <BOTH,SCRIPT>"OUTPUT_ARCH"              { RTOKEN( OUTPUT_ARCH);}
 289 <BOTH,SCRIPT>"HLL"                      { RTOKEN(HLL);}
 290 <BOTH,SCRIPT>"SYSLIB"           { RTOKEN(SYSLIB);}
 291 <BOTH,SCRIPT>"FLOAT"                    { RTOKEN(FLOAT);}
 292 <BOTH,SCRIPT>"QUAD"                     { RTOKEN( QUAD);}
 293 <BOTH,SCRIPT>"SQUAD"                    { RTOKEN( SQUAD);}
 294 <BOTH,SCRIPT>"LONG"                     { RTOKEN( LONG);}
 295 <BOTH,SCRIPT>"SHORT"                    { RTOKEN( SHORT);}
 296 <BOTH,SCRIPT>"BYTE"                     { RTOKEN( BYTE);}
 297 <BOTH,SCRIPT>"NOFLOAT"          { RTOKEN(NOFLOAT);}
 298 <EXPRESSION,BOTH,SCRIPT>"NOCROSSREFS"   { RTOKEN(NOCROSSREFS);}
 299 <BOTH,SCRIPT>"OVERLAY"                  { RTOKEN(OVERLAY); }
 300 <BOTH,SCRIPT>"SORT"                     { RTOKEN(SORT); }
 301 <EXPRESSION,BOTH,SCRIPT>"NOLOAD"        { RTOKEN(NOLOAD);}
 302 <EXPRESSION,BOTH,SCRIPT>"DSECT"         { RTOKEN(DSECT);}
 303 <EXPRESSION,BOTH,SCRIPT>"COPY"          { RTOKEN(COPY);}
 304 <EXPRESSION,BOTH,SCRIPT>"INFO"          { RTOKEN(INFO);}
 305 <EXPRESSION,BOTH,SCRIPT>"OVERLAY"       { RTOKEN(OVERLAY);}
 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>"PROVIDE"               { RTOKEN(PROVIDE); }
 314 <EXPRESSION,BOTH,SCRIPT>"KEEP"          { RTOKEN(KEEP); }
 315 <EXPRESSION,BOTH,SCRIPT>"EXCLUDE_FILE"        { RTOKEN(EXCLUDE_FILE); }
 316 <MRI>"#".*\n?                   { ++ lineno; }
 317 <MRI>"\n"                       { ++ lineno;  RTOKEN(NEWLINE); }
 318 <MRI>"*".*                      { /* Mri comment line */ }
 319 <MRI>";".*                      { /* Mri comment line */ }
 320 <MRI>"END"                      { RTOKEN(ENDWORD); }
 321 <MRI>"ALIGNMOD"         { RTOKEN(ALIGNMOD);}
 322 <MRI>"ALIGN"            { RTOKEN(ALIGN_K);}
 323 <MRI>"CHIP"                     { RTOKEN(CHIP); }
 324 <MRI>"BASE"                     { RTOKEN(BASE); }
 325 <MRI>"ALIAS"                     { RTOKEN(ALIAS); }
 326 <MRI>"TRUNCATE"                     { RTOKEN(TRUNCATE); }
 327 <MRI>"LOAD"                     { RTOKEN(LOAD); }
 328 <MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
 329 <MRI>"ORDER"                    { RTOKEN(ORDER); }
 330 <MRI>"NAME"                     { RTOKEN(NAMEWORD); }
 331 <MRI>"FORMAT"                   { RTOKEN(FORMAT); }
 332 <MRI>"CASE"                     { RTOKEN(CASE); }
 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 <MRI>"end"                      { RTOKEN(ENDWORD); }
 338 <MRI>"alignmod"         { RTOKEN(ALIGNMOD);}
 339 <MRI>"align"            { RTOKEN(ALIGN_K);}
 340 <MRI>"chip"                     { RTOKEN(CHIP); }
 341 <MRI>"base"                     { RTOKEN(BASE); }
 342 <MRI>"alias"                     { RTOKEN(ALIAS); }
 343 <MRI>"truncate"                     { RTOKEN(TRUNCATE); }
 344 <MRI>"load"                     { RTOKEN(LOAD); }
 345 <MRI>"public"                   { RTOKEN(PUBLIC); }
 346 <MRI>"order"                    { RTOKEN(ORDER); }
 347 <MRI>"name"                     { RTOKEN(NAMEWORD); }
 348 <MRI>"format"                   { RTOKEN(FORMAT); }
 349 <MRI>"case"                     { RTOKEN(CASE); }
 350 <MRI>"extern"                   { RTOKEN(EXTERN); }
 351 <MRI>"start"                    { RTOKEN(START); }
 352 <MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 353 <MRI>"sect"                     { RTOKEN(SECT); }
 354 <EXPRESSION,BOTH,SCRIPT,MRI>"absolute"                  { RTOKEN(ABSOLUTE); }
 355
 356 <MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*  {
 357 /* Filename without commas, needed to parse mri stuff */
 358                                  yylval.name = xstrdup(yytext);
 359                                   return NAME;
 360                                 }
 361
 362
 363 <BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}* {
 364                                  yylval.name = xstrdup(yytext);
 365                                   return NAME;
 366                                 }
 367 <BOTH,EXPRESSION>"-l"{FILENAMECHAR}+ {
 368                                   yylval.name = xstrdup (yytext + 2);
 369                                   return LNAME;
 370                                 }
 371 <SCRIPT>{WILDCHAR}* {
 372                 /* Annoyingly, this pattern can match comments, and we have
 373                    longest match issues to consider.  So if the first two
 374                    characters are a comment opening, put the input back and
 375                    try again.  */
 376                 if (yytext[0] == '/' && yytext[1] == '*')
 377                   {
 378                     yyless(2);
 379                     comment ();
 380                   }
 381                 else
 382                   {
 383                     yylval.name = xstrdup(yytext);
 384                     return NAME;
 385                   }
 386         }
 387
 388 <EXPRESSION,BOTH,SCRIPT,VERS_NODE>"\""[^\"]*"\"" {
 389                                         /* No matter the state, quotes
 390                                            give what's inside */
 391                                         yylval.name = xstrdup(yytext+1);
 392                                         yylval.name[yyleng-2] = 0;
 393                                         return NAME;
 394                                 }
 395 <BOTH,SCRIPT,EXPRESSION>"\n"            { lineno++;}
 396 <MRI,BOTH,SCRIPT,EXPRESSION>[ \t\r]+    { }
 397
 398 <VERS_NODE,VERS_SCRIPT>[:,;]    { return *yytext; }
 399
 400 <VERS_NODE>global               { RTOKEN(GLOBAL); }
 401
 402 <VERS_NODE>local                { RTOKEN(LOCAL); }
 403
 404 <VERS_NODE>extern               { RTOKEN(EXTERN); }
 405
 406 <VERS_NODE>{V_IDENTIFIER}       { yylval.name = xstrdup (yytext);
 407                                   return VERS_IDENTIFIER; }
 408
 409 <VERS_SCRIPT>{V_TAG}            { yylval.name = xstrdup (yytext);
 410                                   return VERS_TAG; }
 411
 412 <VERS_START>"{"                 { BEGIN(VERS_SCRIPT); return *yytext; }
 413
 414 <VERS_SCRIPT>"{"                { BEGIN(VERS_NODE);
 415                                   vers_node_nesting = 0;
 416                                   return *yytext;
 417                                 }
 418 <VERS_SCRIPT>"}"                { return *yytext; }
 419 <VERS_NODE>"{"                  { vers_node_nesting++; return *yytext; }
 420 <VERS_NODE>"}"                  { if (--vers_node_nesting < 0)
 421                                     BEGIN(VERS_SCRIPT);
 422                                   return *yytext;
 423                                 }
 424
 425 <VERS_START,VERS_NODE,VERS_SCRIPT>[\n]          { lineno++; }
 426
 427 <VERS_START,VERS_NODE,VERS_SCRIPT>#.*           { /* Eat up comments */ }
 428
 429 <VERS_START,VERS_NODE,VERS_SCRIPT>[ \t\r]+      { /* Eat up whitespace */ }
 430
 431 <<EOF>> {
 432   include_stack_ptr--;
 433
 434   if (include_stack_ptr == 0)
 435   {
 436     yyterminate();
 437   }
 438   else
 439   {
 440     yy_switch_to_buffer(include_stack[include_stack_ptr]);
 441   }
 442
 443   ldfile_input_filename = file_name_stack[include_stack_ptr - 1];
 444   lineno = lineno_stack[include_stack_ptr];
 445
 446   return END;
 447 }
 448
 449 <SCRIPT,MRI,VERS_START,VERS_SCRIPT,VERS_NODE>.  lex_warn_invalid(" in script", yytext);
 450 <EXPRESSION,DEFSYMEXP,BOTH>.    lex_warn_invalid(" in expression", yytext);
 451
 452 %%
 453 \f
 454
 455 /* Switch flex to reading script file NAME, open on FILE,
 456    saving the current input info on the include stack.  */
 457
 458 void
 459 lex_push_file (file, name)
 460      FILE *file;
 461      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 (string, size)
 482      const char *string;
 483      size_t size;
 484 {
 485   YY_BUFFER_STATE b;
 486
 487   /* Calls to m-alloc get turned by sed into xm-alloc.  */
 488   b = (YY_BUFFER_STATE) malloc (sizeof (struct yy_buffer_state));
 489   b->yy_input_file = 0;
 490   b->yy_buf_size = size;
 491
 492   /* yy_ch_buf has to be 2 characters longer than the size given because
 493      we need to put in 2 end-of-buffer characters.  */
 494   b->yy_ch_buf = (char *) malloc ((unsigned) (b->yy_buf_size + 3));
 495
 496   b->yy_ch_buf[0] = '\n';
 497   strcpy (b->yy_ch_buf+1, string);
 498   b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
 499   b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
 500   b->yy_n_chars = size+1;
 501   b->yy_buf_pos = &b->yy_ch_buf[1];
 502
 503   b->yy_is_our_buffer = 1;
 504   b->yy_is_interactive = 0;
 505   b->yy_at_bol = 1;
 506   b->yy_fill_buffer = 0;
 507
 508   /* flex 2.4.7 changed the interface.  FIXME: We should not be using
 509      a flex internal interface in the first place!  */
 510 #ifdef YY_BUFFER_NEW
 511   b->yy_buffer_status = YY_BUFFER_NEW;
 512 #else
 513   b->yy_eof_status = EOF_NOT_SEEN;
 514 #endif
 515
 516   return b;
 517 }
 518
 519 /* Switch flex to reading from STRING, saving the current input info
 520    on the include stack.  */
 521
 522 void
 523 lex_redirect (string)
 524      const char *string;
 525 {
 526   YY_BUFFER_STATE tmp;
 527
 528   yy_init = 0;
 529   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 530     {
 531       einfo("%F: macros nested too deeply\n");
 532     }
 533   file_name_stack[include_stack_ptr] = "redirect";
 534   lineno_stack[include_stack_ptr] = lineno;
 535   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 536   include_stack_ptr++;
 537   lineno = 1;
 538   tmp = yy_create_string_buffer (string, strlen (string));
 539   yy_switch_to_buffer (tmp);
 540 }
 541 \f
 542 /* Functions to switch to a different flex start condition,
 543    saving the current start condition on `state_stack'.  */
 544
 545 static int state_stack[MAX_INCLUDE_DEPTH * 2];
 546 static int *state_stack_p = state_stack;
 547
 548 void
 549 ldlex_script ()
 550 {
 551   *(state_stack_p)++ = yy_start;
 552   BEGIN (SCRIPT);
 553 }
 554
 555 void
 556 ldlex_mri_script ()
 557 {
 558   *(state_stack_p)++ = yy_start;
 559   BEGIN (MRI);
 560 }
 561
 562 void
 563 ldlex_version_script ()
 564 {
 565   *(state_stack_p)++ = yy_start;
 566   BEGIN (VERS_START);
 567 }
 568
 569 void
 570 ldlex_version_file ()
 571 {
 572   *(state_stack_p)++ = yy_start;
 573   BEGIN (VERS_SCRIPT);
 574 }
 575
 576 void
 577 ldlex_defsym ()
 578 {
 579   *(state_stack_p)++ = yy_start;
 580   BEGIN (DEFSYMEXP);
 581 }
 582
 583 void
 584 ldlex_expression ()
 585 {
 586   *(state_stack_p)++ = yy_start;
 587   BEGIN (EXPRESSION);
 588 }
 589
 590 void
 591 ldlex_both ()
 592 {
 593   *(state_stack_p)++ = yy_start;
 594   BEGIN (BOTH);
 595 }
 596
 597 void
 598 ldlex_popstate ()
 599 {
 600   yy_start = *(--state_stack_p);
 601 }
 602 \f
 603
 604 /* Place up to MAX_SIZE characters in BUF and return in *RESULT
 605    either the number of characters read, or 0 to indicate EOF.  */
 606
 607 static void
 608 yy_input (buf, result, max_size)
 609      char *buf;
 610      int *result;
 611      int max_size;
 612 {
 613   *result = 0;
 614   if (YY_CURRENT_BUFFER->yy_input_file)
 615     {
 616       if (yyin)
 617         {
 618           *result = fread ((char *) buf, 1, max_size, yyin);
 619           if (*result < max_size && ferror (yyin))
 620             einfo ("%F%P: read in flex scanner failed\n");
 621         }
 622     }
 623 }
 624
 625 /* Eat the rest of a C-style comment.  */
 626
 627 static void
 628 comment ()
 629 {
 630   int c;
 631
 632   while (1)
 633   {
 634     c = input();
 635     while (c != '*' && c != EOF)
 636     {
 637       if (c == '\n')
 638         lineno++;
 639       c = input();
 640     }
 641
 642     if (c == '*')
 643     {
 644       c = input();
 645       while (c == '*')
 646        c = input();
 647       if (c == '/')
 648        break;                   /* found the end */
 649     }
 650
 651     if (c == '\n')
 652       lineno++;
 653
 654     if (c == EOF)
 655     {
 656       einfo( "%F%P: EOF in comment\n");
 657       break;
 658     }
 659   }
 660 }
 661
 662 /* Warn the user about a garbage character WHAT in the input
 663    in context WHERE.  */
 664
 665 static void
 666 lex_warn_invalid (where, what)
 667      char *where, *what;
 668 {
 669   char buf[5];
 670
 671   /* If we have found an input file whose format we do not recognize,
 672      and we are therefore treating it as a linker script, and we find
 673      an invalid character, then most likely this is a real object file
 674      of some different format.  Treat it as such.  */
 675   if (ldfile_assumed_script)
 676     {
 677       bfd_set_error (bfd_error_file_not_recognized);
 678       einfo ("%F%s: file not recognized: %E\n", ldfile_input_filename);
 679     }
 680
 681   if (! ISPRINT (*what))
 682     {
 683       sprintf (buf, "\\%03o", (unsigned int) *what);
 684       what = buf;
 685     }
 686
 687   einfo ("%P:%S: ignoring invalid character `%s'%s\n", what, where);
 688 }