ld/ldlex.l

   1 %{
   2
   3 /* Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
   4    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 #include <ctype.h>
  32
  33 #ifdef MPW
  34 /* Prevent enum redefinition problems. */
  35 #define TRUE_FALSE_ALREADY_DEFINED
  36 #endif /* MPW */
  37
  38 #include "bfd.h"
  39 #include "sysdep.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>"ADDR"                  { RTOKEN(ADDR);}
 243 <EXPRESSION,BOTH,SCRIPT>"LOADADDR"              { RTOKEN(LOADADDR);}
 244 <EXPRESSION,BOTH>"MAX"                  { RTOKEN(MAX_K); }
 245 <EXPRESSION,BOTH>"MIN"                  { RTOKEN(MIN_K); }
 246 <EXPRESSION,BOTH>"ASSERT"               { RTOKEN(ASSERT_K); }
 247 <BOTH,SCRIPT>"ENTRY"                    { RTOKEN(ENTRY);}
 248 <BOTH,SCRIPT,MRI>"EXTERN"               { RTOKEN(EXTERN);}
 249 <EXPRESSION,BOTH,SCRIPT>"NEXT"                  { RTOKEN(NEXT);}
 250 <EXPRESSION,BOTH,SCRIPT>"sizeof_headers"        { RTOKEN(SIZEOF_HEADERS);}
 251 <EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS"        { RTOKEN(SIZEOF_HEADERS);}
 252 <BOTH,SCRIPT>"MAP"                      { RTOKEN(MAP);}
 253 <EXPRESSION,BOTH,SCRIPT>"SIZEOF"                { RTOKEN(SIZEOF);}
 254 <BOTH,SCRIPT>"TARGET"           { RTOKEN(TARGET_K);}
 255 <BOTH,SCRIPT>"SEARCH_DIR"               { RTOKEN(SEARCH_DIR);}
 256 <BOTH,SCRIPT>"OUTPUT"           { RTOKEN(OUTPUT);}
 257 <BOTH,SCRIPT>"INPUT"                    { RTOKEN(INPUT);}
 258 <EXPRESSION,BOTH,SCRIPT>"GROUP"         { RTOKEN(GROUP);}
 259 <EXPRESSION,BOTH,SCRIPT>"DEFINED"               { RTOKEN(DEFINED);}
 260 <BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS"    { RTOKEN(CREATE_OBJECT_SYMBOLS);}
 261 <BOTH,SCRIPT>"CONSTRUCTORS"             { RTOKEN( CONSTRUCTORS);}
 262 <BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION" { RTOKEN(FORCE_COMMON_ALLOCATION);}
 263 <BOTH,SCRIPT>"SECTIONS"         { RTOKEN(SECTIONS);}
 264 <BOTH,SCRIPT>"FILL"                     { RTOKEN(FILL);}
 265 <BOTH,SCRIPT>"STARTUP"          { RTOKEN(STARTUP);}
 266 <BOTH,SCRIPT>"OUTPUT_FORMAT"            { RTOKEN(OUTPUT_FORMAT);}
 267 <BOTH,SCRIPT>"OUTPUT_ARCH"              { RTOKEN( OUTPUT_ARCH);}
 268 <BOTH,SCRIPT>"HLL"                      { RTOKEN(HLL);}
 269 <BOTH,SCRIPT>"SYSLIB"           { RTOKEN(SYSLIB);}
 270 <BOTH,SCRIPT>"FLOAT"                    { RTOKEN(FLOAT);}
 271 <BOTH,SCRIPT>"QUAD"                     { RTOKEN( QUAD);}
 272 <BOTH,SCRIPT>"SQUAD"                    { RTOKEN( SQUAD);}
 273 <BOTH,SCRIPT>"LONG"                     { RTOKEN( LONG);}
 274 <BOTH,SCRIPT>"SHORT"                    { RTOKEN( SHORT);}
 275 <BOTH,SCRIPT>"BYTE"                     { RTOKEN( BYTE);}
 276 <BOTH,SCRIPT>"NOFLOAT"          { RTOKEN(NOFLOAT);}
 277 <EXPRESSION,BOTH,SCRIPT>"NOCROSSREFS"   { RTOKEN(NOCROSSREFS);}
 278 <BOTH,SCRIPT>"OVERLAY"                  { RTOKEN(OVERLAY); }
 279 <BOTH,SCRIPT>"SORT"                     { RTOKEN(SORT); }
 280 <EXPRESSION,BOTH,SCRIPT>"NOLOAD"        { RTOKEN(NOLOAD);}
 281 <EXPRESSION,BOTH,SCRIPT>"DSECT"         { RTOKEN(DSECT);}
 282 <EXPRESSION,BOTH,SCRIPT>"COPY"          { RTOKEN(COPY);}
 283 <EXPRESSION,BOTH,SCRIPT>"INFO"          { RTOKEN(INFO);}
 284 <EXPRESSION,BOTH,SCRIPT>"OVERLAY"       { RTOKEN(OVERLAY);}
 285 <BOTH,SCRIPT>"o"                        { RTOKEN(ORIGIN);}
 286 <BOTH,SCRIPT>"org"                      { RTOKEN(ORIGIN);}
 287 <BOTH,SCRIPT>"l"                        { RTOKEN( LENGTH);}
 288 <BOTH,SCRIPT>"len"                      { RTOKEN( LENGTH);}
 289 <BOTH,SCRIPT>"INCLUDE"                  { RTOKEN(INCLUDE);}
 290 <BOTH,SCRIPT>"PHDRS"                    { RTOKEN (PHDRS); }
 291 <EXPRESSION,BOTH,SCRIPT>"AT"                    { RTOKEN(AT);}
 292 <EXPRESSION,BOTH,SCRIPT>"PROVIDE"               { RTOKEN(PROVIDE); }
 293 <EXPRESSION,BOTH,SCRIPT>"KEEP"          { RTOKEN(KEEP); }
 294 <EXPRESSION,BOTH,SCRIPT>"EXCLUDE_FILE"        { RTOKEN(EXCLUDE_FILE); }
 295 <MRI>"#".*\n?                   { ++ lineno; }
 296 <MRI>"\n"                       { ++ lineno;  RTOKEN(NEWLINE); }
 297 <MRI>"*".*                      { /* Mri comment line */ }
 298 <MRI>";".*                      { /* Mri comment line */ }
 299 <MRI>"END"                      { RTOKEN(ENDWORD); }
 300 <MRI>"ALIGNMOD"         { RTOKEN(ALIGNMOD);}
 301 <MRI>"ALIGN"            { RTOKEN(ALIGN_K);}
 302 <MRI>"CHIP"                     { RTOKEN(CHIP); }
 303 <MRI>"BASE"                     { RTOKEN(BASE); }
 304 <MRI>"ALIAS"                     { RTOKEN(ALIAS); }
 305 <MRI>"TRUNCATE"                     { RTOKEN(TRUNCATE); }
 306 <MRI>"LOAD"                     { RTOKEN(LOAD); }
 307 <MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
 308 <MRI>"ORDER"                    { RTOKEN(ORDER); }
 309 <MRI>"NAME"                     { RTOKEN(NAMEWORD); }
 310 <MRI>"FORMAT"                   { RTOKEN(FORMAT); }
 311 <MRI>"CASE"                     { RTOKEN(CASE); }
 312 <MRI>"START"                    { RTOKEN(START); }
 313 <MRI>"LIST".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 314 <MRI>"SECT"                     { RTOKEN(SECT); }
 315 <EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE"                  { RTOKEN(ABSOLUTE); }
 316 <MRI>"end"                      { RTOKEN(ENDWORD); }
 317 <MRI>"alignmod"         { RTOKEN(ALIGNMOD);}
 318 <MRI>"align"            { RTOKEN(ALIGN_K);}
 319 <MRI>"chip"                     { RTOKEN(CHIP); }
 320 <MRI>"base"                     { RTOKEN(BASE); }
 321 <MRI>"alias"                     { RTOKEN(ALIAS); }
 322 <MRI>"truncate"                     { RTOKEN(TRUNCATE); }
 323 <MRI>"load"                     { RTOKEN(LOAD); }
 324 <MRI>"public"                   { RTOKEN(PUBLIC); }
 325 <MRI>"order"                    { RTOKEN(ORDER); }
 326 <MRI>"name"                     { RTOKEN(NAMEWORD); }
 327 <MRI>"format"                   { RTOKEN(FORMAT); }
 328 <MRI>"case"                     { RTOKEN(CASE); }
 329 <MRI>"extern"                   { RTOKEN(EXTERN); }
 330 <MRI>"start"                    { RTOKEN(START); }
 331 <MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 332 <MRI>"sect"                     { RTOKEN(SECT); }
 333 <EXPRESSION,BOTH,SCRIPT,MRI>"absolute"                  { RTOKEN(ABSOLUTE); }
 334
 335 <MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*  {
 336 /* Filename without commas, needed to parse mri stuff */
 337                                  yylval.name = xstrdup(yytext);
 338                                   return NAME;
 339                                 }
 340
 341
 342 <BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}* {
 343                                  yylval.name = xstrdup(yytext);
 344                                   return NAME;
 345                                 }
 346 <BOTH,EXPRESSION>"-l"{FILENAMECHAR}+ {
 347                                   yylval.name = xstrdup (yytext + 2);
 348                                   return LNAME;
 349                                 }
 350 <SCRIPT>{WILDCHAR}* {
 351                 /* Annoyingly, this pattern can match comments, and we have
 352                    longest match issues to consider.  So if the first two
 353                    characters are a comment opening, put the input back and
 354                    try again.  */
 355                 if (yytext[0] == '/' && yytext[1] == '*')
 356                   {
 357                     yyless(2);
 358                     comment ();
 359                   }
 360                 else
 361                   {
 362                     yylval.name = xstrdup(yytext);
 363                     return NAME;
 364                   }
 365         }
 366
 367 <EXPRESSION,BOTH,SCRIPT,VERS_NODE>"\""[^\"]*"\"" {
 368                                         /* No matter the state, quotes
 369                                            give what's inside */
 370                                         yylval.name = xstrdup(yytext+1);
 371                                         yylval.name[yyleng-2] = 0;
 372                                         return NAME;
 373                                 }
 374 <BOTH,SCRIPT,EXPRESSION>"\n"            { lineno++;}
 375 <MRI,BOTH,SCRIPT,EXPRESSION>[ \t\r]+    { }
 376
 377 <VERS_NODE,VERS_SCRIPT>[:,;]    { return *yytext; }
 378
 379 <VERS_NODE>global               { RTOKEN(GLOBAL); }
 380
 381 <VERS_NODE>local                { RTOKEN(LOCAL); }
 382
 383 <VERS_NODE>extern               { RTOKEN(EXTERN); }
 384
 385 <VERS_NODE>{V_IDENTIFIER}       { yylval.name = xstrdup (yytext);
 386                                   return VERS_IDENTIFIER; }
 387
 388 <VERS_SCRIPT>{V_TAG}            { yylval.name = xstrdup (yytext);
 389                                   return VERS_TAG; }
 390
 391 <VERS_START>"{"                 { BEGIN(VERS_SCRIPT); return *yytext; }
 392
 393 <VERS_SCRIPT>"{"                { BEGIN(VERS_NODE);
 394                                   vers_node_nesting = 0;
 395                                   return *yytext;
 396                                 }
 397 <VERS_SCRIPT>"}"                { return *yytext; }
 398 <VERS_NODE>"{"                  { vers_node_nesting++; return *yytext; }
 399 <VERS_NODE>"}"                  { if (--vers_node_nesting < 0)
 400                                     BEGIN(VERS_SCRIPT);
 401                                   return *yytext;
 402                                 }
 403
 404 <VERS_START,VERS_NODE,VERS_SCRIPT>[\n]          { lineno++; }
 405
 406 <VERS_START,VERS_NODE,VERS_SCRIPT>#.*           { /* Eat up comments */ }
 407
 408 <VERS_START,VERS_NODE,VERS_SCRIPT>[ \t\r]+      { /* Eat up whitespace */ }
 409
 410 <<EOF>> {
 411   include_stack_ptr--;
 412
 413   if (include_stack_ptr == 0)
 414   {
 415     yyterminate();
 416   }
 417   else
 418   {
 419     yy_switch_to_buffer(include_stack[include_stack_ptr]);
 420
 421   }
 422   BEGIN(SCRIPT);
 423   ldfile_input_filename = file_name_stack[include_stack_ptr - 1];
 424   lineno = lineno_stack[include_stack_ptr - 1];
 425
 426   return END;
 427 }
 428
 429 <SCRIPT,MRI,VERS_START,VERS_SCRIPT,VERS_NODE>.  lex_warn_invalid(" in script", yytext);
 430 <EXPRESSION,DEFSYMEXP,BOTH>.    lex_warn_invalid(" in expression", yytext);
 431
 432 %%
 433 \f
 434
 435 /* Switch flex to reading script file NAME, open on FILE,
 436    saving the current input info on the include stack.  */
 437
 438 void
 439 lex_push_file (file, name)
 440      FILE *file;
 441      const char *name;
 442 {
 443   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 444     {
 445       einfo("%F:includes nested too deeply\n");
 446     }
 447   file_name_stack[include_stack_ptr] = name;
 448   lineno_stack[include_stack_ptr] = 1;
 449   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 450
 451   include_stack_ptr++;
 452   yyin = file;
 453   yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
 454   BEGIN (SCRIPT);
 455 }
 456
 457 /* Return a newly created flex input buffer containing STRING,
 458    which is SIZE bytes long.  */
 459
 460 static YY_BUFFER_STATE
 461 yy_create_string_buffer (string, size)
 462      CONST char *string;
 463      size_t size;
 464 {
 465   YY_BUFFER_STATE b;
 466
 467   /* Calls to m-alloc get turned by sed into xm-alloc.  */
 468   b = (YY_BUFFER_STATE) malloc (sizeof (struct yy_buffer_state));
 469   b->yy_input_file = 0;
 470   b->yy_buf_size = size;
 471
 472   /* yy_ch_buf has to be 2 characters longer than the size given because
 473      we need to put in 2 end-of-buffer characters.  */
 474   b->yy_ch_buf = (char *) malloc ((unsigned) (b->yy_buf_size + 3));
 475
 476   b->yy_ch_buf[0] = '\n';
 477   strcpy (b->yy_ch_buf+1, string);
 478   b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
 479   b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
 480   b->yy_n_chars = size+1;
 481   b->yy_buf_pos = &b->yy_ch_buf[1];
 482
 483   b->yy_is_our_buffer = 1;
 484   b->yy_is_interactive = 0;
 485   b->yy_at_bol = 1;
 486   b->yy_fill_buffer = 0;
 487
 488   /* flex 2.4.7 changed the interface.  FIXME: We should not be using
 489      a flex internal interface in the first place!  */
 490 #ifdef YY_BUFFER_NEW
 491   b->yy_buffer_status = YY_BUFFER_NEW;
 492 #else
 493   b->yy_eof_status = EOF_NOT_SEEN;
 494 #endif
 495
 496   return b;
 497 }
 498
 499 /* Switch flex to reading from STRING, saving the current input info
 500    on the include stack.  */
 501
 502 void
 503 lex_redirect (string)
 504      CONST char *string;
 505 {
 506   YY_BUFFER_STATE tmp;
 507
 508   yy_init = 0;
 509   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 510     {
 511       einfo("%F: macros nested too deeply\n");
 512     }
 513   file_name_stack[include_stack_ptr] = "redirect";
 514   lineno_stack[include_stack_ptr] = 0;
 515   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 516   include_stack_ptr++;
 517   tmp = yy_create_string_buffer (string, strlen (string));
 518   yy_switch_to_buffer (tmp);
 519   BEGIN (SCRIPT);
 520 }
 521 \f
 522 /* Functions to switch to a different flex start condition,
 523    saving the current start condition on `state_stack'.  */
 524
 525 static int state_stack[MAX_INCLUDE_DEPTH * 2];
 526 static int *state_stack_p = state_stack;
 527
 528 void
 529 ldlex_script ()
 530 {
 531   *(state_stack_p)++ = yy_start;
 532   BEGIN (SCRIPT);
 533 }
 534
 535 void
 536 ldlex_mri_script ()
 537 {
 538   *(state_stack_p)++ = yy_start;
 539   BEGIN (MRI);
 540 }
 541
 542 void
 543 ldlex_version_script ()
 544 {
 545   *(state_stack_p)++ = yy_start;
 546   BEGIN (VERS_START);
 547 }
 548
 549 void
 550 ldlex_version_file ()
 551 {
 552   *(state_stack_p)++ = yy_start;
 553   BEGIN (VERS_SCRIPT);
 554 }
 555
 556 void
 557 ldlex_defsym ()
 558 {
 559   *(state_stack_p)++ = yy_start;
 560   BEGIN (DEFSYMEXP);
 561 }
 562
 563 void
 564 ldlex_expression ()
 565 {
 566   *(state_stack_p)++ = yy_start;
 567   BEGIN (EXPRESSION);
 568 }
 569
 570 void
 571 ldlex_both ()
 572 {
 573   *(state_stack_p)++ = yy_start;
 574   BEGIN (BOTH);
 575 }
 576
 577 void
 578 ldlex_popstate ()
 579 {
 580   yy_start = *(--state_stack_p);
 581 }
 582 \f
 583
 584 /* Place up to MAX_SIZE characters in BUF and return in *RESULT
 585    either the number of characters read, or 0 to indicate EOF.  */
 586
 587 static void
 588 yy_input (buf, result, max_size)
 589      char *buf;
 590      int *result;
 591      int max_size;
 592 {
 593   *result = 0;
 594   if (yy_current_buffer->yy_input_file)
 595     {
 596       if (yyin)
 597         {
 598           *result = read (fileno (yyin), (char *) buf, max_size);
 599           if (*result < 0)
 600             einfo ("%F%P: read in flex scanner failed\n");
 601         }
 602     }
 603 }
 604
 605 /* Eat the rest of a C-style comment.  */
 606
 607 static void
 608 comment ()
 609 {
 610   int c;
 611
 612   while (1)
 613   {
 614     c = input();
 615     while (c != '*' && c != EOF)
 616     {
 617       if (c == '\n')
 618         lineno++;
 619       c = input();
 620     }
 621
 622     if (c == '*')
 623     {
 624       c = input();
 625       while (c == '*')
 626        c = input();
 627       if (c == '/')
 628        break;                   /* found the end */
 629     }
 630
 631     if (c == '\n')
 632       lineno++;
 633
 634     if (c == EOF)
 635     {
 636       einfo( "%F%P: EOF in comment\n");
 637       break;
 638     }
 639   }
 640 }
 641
 642 /* Warn the user about a garbage character WHAT in the input
 643    in context WHERE.  */
 644
 645 static void
 646 lex_warn_invalid (where, what)
 647      char *where, *what;
 648 {
 649   char buf[5];
 650
 651   /* If we have found an input file whose format we do not recognize,
 652      and we are therefore treating it as a linker script, and we find
 653      an invalid character, then most likely this is a real object file
 654      of some different format.  Treat it as such.  */
 655   if (ldfile_assumed_script)
 656     {
 657       bfd_set_error (bfd_error_file_not_recognized);
 658       einfo ("%F%s: file not recognized: %E\n", ldfile_input_filename);
 659     }
 660
 661   if (! isprint ((unsigned char) *what))
 662     {
 663       sprintf (buf, "\\%03o", (unsigned int) *what);
 664       what = buf;
 665     }
 666
 667   einfo ("%P:%S: ignoring invalid character `%s'%s\n", what, where);
 668 }