ld/ldlex.l

   1 %{
   2
   3 /* Copyright (C) 1991, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
   4
   5 This file is part of GLD, the Gnu Linker.
   6
   7 GLD is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GLD is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GLD; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 /*
  22 This was written by steve chamberlain
  23                     sac@cygnus.com
  24 */
  25
  26
  27 #include <ansidecl.h>
  28 #include <stdio.h>
  29 #include <ctype.h>
  30
  31 #ifdef MPW
  32 /* Prevent enum redefinition problems. */
  33 #define TRUE_FALSE_ALREADY_DEFINED
  34 #endif /* MPW */
  35
  36 #include "bfd.h"
  37 #include "sysdep.h"
  38 #include "ld.h"
  39 #include "ldgram.h"
  40 #include "ldmisc.h"
  41 #include "ldexp.h"
  42 #include "ldlang.h"
  43 #include "ldfile.h"
  44 #include "ldlex.h"
  45 #include "ldmain.h"
  46
  47 /* The type of top-level parser input.
  48    yylex and yyparse (indirectly) both check this.  */
  49 input_type parser_input;
  50
  51 /* Radix to use for bfd_scan_vma -- 0 (default to base 10) or 16.  */
  52 int hex_mode;
  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
  79 static YY_BUFFER_STATE yy_create_string_buffer PARAMS ((const char *string,
  80                                                         size_t size));
  81 static void yy_input PARAMS ((char *, int *result, int max_size));
  82
  83 static void comment PARAMS ((void));
  84 static void lex_warn_invalid PARAMS ((char *where, char *what));
  85
  86 /* STATES
  87         EXPRESSION      definitely in an expression
  88         SCRIPT          definitely in a script
  89         BOTH            either EXPRESSION or SCRIPT
  90         DEFSYMEXP       in an argument to -defsym
  91         MRI             in an MRI script
  92         VERS_START      starting a Sun style mapfile
  93         VERS_SCRIPT     a Sun style mapfile
  94         VERS_NODE       a node within a Sun style mapfile
  95 */
  96 #define RTOKEN(x)  {  yylval.token = x; return x; }
  97
  98 /* Some versions of flex want this.  */
  99 #ifndef yywrap
 100 int yywrap () { return 1; }
 101 #endif
 102 %}
 103
 104 %a 4000
 105 %o 5000
 106
 107 CMDFILENAMECHAR   [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
 108 CMDFILENAMECHAR1  [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
 109 FILENAMECHAR1   [_a-zA-Z\/\.\\\$\_\~]
 110 SYMBOLCHARN     [_a-zA-Z\/\.\\\$\_\~0-9]
 111 FILENAMECHAR    [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
 112 WILDCHAR        [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~\?\*]
 113 WHITE           [ \t\n\r]+
 114
 115 NOCFILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
 116
 117 V_TAG [.$_a-zA-Z][._a-zA-Z0-9]*
 118 V_IDENTIFIER [*?$_a-zA-Z][*?_a-zA-Z0-9]*
 119
 120 %s SCRIPT
 121 %s EXPRESSION
 122 %s BOTH
 123 %s DEFSYMEXP
 124 %s MRI
 125 %s VERS_START
 126 %s VERS_SCRIPT
 127 %s VERS_NODE
 128 %%
 129
 130   if (parser_input != input_selected)
 131     {
 132       /* The first token of the input determines the initial parser state.  */
 133       input_type t = parser_input;
 134       parser_input = input_selected;
 135       switch (t)
 136         {
 137         case input_script: return INPUT_SCRIPT; break;
 138         case input_mri_script: return INPUT_MRI_SCRIPT; break;
 139         case input_version_script: return INPUT_VERSION_SCRIPT; break;
 140         case input_defsym: return INPUT_DEFSYM; break;
 141         default: abort ();
 142         }
 143     }
 144
 145 <BOTH,SCRIPT,EXPRESSION>"/*"    { comment(); }
 146
 147
 148 <DEFSYMEXP>"-"                  { RTOKEN('-');}
 149 <DEFSYMEXP>"+"                  { RTOKEN('+');}
 150 <DEFSYMEXP>{FILENAMECHAR1}{SYMBOLCHARN}*   { yylval.name = buystring(yytext); return NAME; }
 151 <DEFSYMEXP>"="                  { RTOKEN('='); }
 152
 153 <MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
 154                                 yylval.integer = bfd_scan_vma (yytext+1, 0,16);
 155                                 return INT;
 156                         }
 157
 158 <MRI,EXPRESSION>([0-9A-Fa-f])+(H|h|X|x|B|b|O|o|D|d) {
 159                                    int ibase ;
 160                                    switch (yytext[yyleng-1]) {
 161                                     case 'X':
 162                                     case 'x':
 163                                     case 'H':
 164                                     case 'h':
 165                                      ibase = 16;
 166                                      break;
 167                                     case 'O':
 168                                     case 'o':
 169                                      ibase = 8;
 170                                      break;
 171                                     case 'B':
 172                                     case 'b':
 173                                      ibase = 2;
 174                                      break;
 175                                     default:
 176                                      ibase = 10;
 177                                    }
 178                                    yylval.integer = bfd_scan_vma (yytext, 0,
 179                                                                   ibase);
 180                                    return INT;
 181                                  }
 182 <SCRIPT,DEFSYMEXP,MRI,BOTH,EXPRESSION>"$"?"0x"?([0-9A-Fa-f])+(M|K|m|k)? {
 183                                   yylval.integer = bfd_scan_vma (yytext, 0,
 184                                                                  hex_mode);
 185                                   if (yytext[yyleng-1]=='M'
 186                                         || yytext[yyleng-1] == 'm') {
 187                                       yylval.integer *= 1024*1024;
 188                                     }
 189                                   if (yytext[yyleng-1]=='K'
 190                                 || yytext[yyleng-1]=='k') {
 191                                       yylval.integer *= 1024;
 192                                     }
 193                                   return INT;
 194                                 }
 195 <BOTH,SCRIPT,EXPRESSION,MRI>"]"         { RTOKEN(']');}
 196 <BOTH,SCRIPT,EXPRESSION,MRI>"["         { RTOKEN('[');}
 197 <BOTH,SCRIPT,EXPRESSION,MRI>"<<="       { RTOKEN(LSHIFTEQ);}
 198 <BOTH,SCRIPT,EXPRESSION,MRI>">>="       { RTOKEN(RSHIFTEQ);}
 199 <BOTH,SCRIPT,EXPRESSION,MRI>"||"        { RTOKEN(OROR);}
 200 <BOTH,SCRIPT,EXPRESSION,MRI>"=="        { RTOKEN(EQ);}
 201 <BOTH,SCRIPT,EXPRESSION,MRI>"!="        { RTOKEN(NE);}
 202 <BOTH,SCRIPT,EXPRESSION,MRI>">="        { RTOKEN(GE);}
 203 <BOTH,SCRIPT,EXPRESSION,MRI>"<="        { RTOKEN(LE);}
 204 <BOTH,SCRIPT,EXPRESSION,MRI>"<<"        { RTOKEN(LSHIFT);}
 205 <BOTH,SCRIPT,EXPRESSION,MRI>">>"        { RTOKEN(RSHIFT);}
 206 <BOTH,SCRIPT,EXPRESSION,MRI>"+="        { RTOKEN(PLUSEQ);}
 207 <BOTH,SCRIPT,EXPRESSION,MRI>"-="        { RTOKEN(MINUSEQ);}
 208 <BOTH,SCRIPT,EXPRESSION,MRI>"*="        { RTOKEN(MULTEQ);}
 209 <BOTH,SCRIPT,EXPRESSION,MRI>"/="        { RTOKEN(DIVEQ);}
 210 <BOTH,SCRIPT,EXPRESSION,MRI>"&="        { RTOKEN(ANDEQ);}
 211 <BOTH,SCRIPT,EXPRESSION,MRI>"|="        { RTOKEN(OREQ);}
 212 <BOTH,SCRIPT,EXPRESSION,MRI>"&&"        { RTOKEN(ANDAND);}
 213 <BOTH,SCRIPT,EXPRESSION,MRI>">"         { RTOKEN('>');}
 214 <BOTH,SCRIPT,EXPRESSION,MRI>","         { RTOKEN(',');}
 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>"MEMORY"           { RTOKEN(MEMORY);}
 234 <BOTH,SCRIPT>"ORIGIN"           { RTOKEN(ORIGIN);}
 235 <BOTH,SCRIPT>"VERSION"          { RTOKEN(VERSION);}
 236 <EXPRESSION,BOTH,SCRIPT>"BLOCK"         { RTOKEN(BLOCK);}
 237 <EXPRESSION,BOTH,SCRIPT>"BIND"          { RTOKEN(BIND);}
 238 <BOTH,SCRIPT>"LENGTH"           { RTOKEN(LENGTH);}
 239 <EXPRESSION,BOTH,SCRIPT>"ALIGN"                 { RTOKEN(ALIGN_K);}
 240 <EXPRESSION,BOTH,SCRIPT>"ADDR"                  { RTOKEN(ADDR);}
 241 <EXPRESSION,BOTH,SCRIPT>"LOADADDR"              { RTOKEN(LOADADDR);}
 242 <EXPRESSION,BOTH>"MAX"                  { RTOKEN(MAX); }
 243 <EXPRESSION,BOTH>"MIN"                  { RTOKEN(MIN); }
 244 <BOTH,SCRIPT>"ENTRY"                    { RTOKEN(ENTRY);}
 245 <EXPRESSION,BOTH,SCRIPT>"NEXT"                  { RTOKEN(NEXT);}
 246 <EXPRESSION,BOTH,SCRIPT>"sizeof_headers"        { RTOKEN(SIZEOF_HEADERS);}
 247 <EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS"        { RTOKEN(SIZEOF_HEADERS);}
 248 <BOTH,SCRIPT>"MAP"                      { RTOKEN(MAP);}
 249 <EXPRESSION,BOTH,SCRIPT>"SIZEOF"                { RTOKEN(SIZEOF);}
 250 <BOTH,SCRIPT>"TARGET"           { RTOKEN(TARGET_K);}
 251 <BOTH,SCRIPT>"SEARCH_DIR"               { RTOKEN(SEARCH_DIR);}
 252 <BOTH,SCRIPT>"OUTPUT"           { RTOKEN(OUTPUT);}
 253 <BOTH,SCRIPT>"INPUT"                    { RTOKEN(INPUT);}
 254 <EXPRESSION,BOTH,SCRIPT>"GROUP"         { RTOKEN(GROUP);}
 255 <EXPRESSION,BOTH,SCRIPT>"DEFINED"               { RTOKEN(DEFINED);}
 256 <BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS"    { RTOKEN(CREATE_OBJECT_SYMBOLS);}
 257 <BOTH,SCRIPT>"CONSTRUCTORS"             { RTOKEN( CONSTRUCTORS);}
 258 <BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION" { RTOKEN(FORCE_COMMON_ALLOCATION);}
 259 <BOTH,SCRIPT>"SECTIONS"         { RTOKEN(SECTIONS);}
 260 <BOTH,SCRIPT>"FILL"                     { RTOKEN(FILL);}
 261 <BOTH,SCRIPT>"STARTUP"          { RTOKEN(STARTUP);}
 262 <BOTH,SCRIPT>"OUTPUT_FORMAT"            { RTOKEN(OUTPUT_FORMAT);}
 263 <BOTH,SCRIPT>"OUTPUT_ARCH"              { RTOKEN( OUTPUT_ARCH);}
 264 <BOTH,SCRIPT>"HLL"                      { RTOKEN(HLL);}
 265 <BOTH,SCRIPT>"SYSLIB"           { RTOKEN(SYSLIB);}
 266 <BOTH,SCRIPT>"FLOAT"                    { RTOKEN(FLOAT);}
 267 <BOTH,SCRIPT>"QUAD"                     { RTOKEN( QUAD);}
 268 <BOTH,SCRIPT>"SQUAD"                    { RTOKEN( SQUAD);}
 269 <BOTH,SCRIPT>"LONG"                     { RTOKEN( LONG);}
 270 <BOTH,SCRIPT>"SHORT"                    { RTOKEN( SHORT);}
 271 <BOTH,SCRIPT>"BYTE"                     { RTOKEN( BYTE);}
 272 <BOTH,SCRIPT>"NOFLOAT"          { RTOKEN(NOFLOAT);}
 273 <EXPRESSION,BOTH,SCRIPT>"NOCROSSREFS"   { RTOKEN(NOCROSSREFS);}
 274 <BOTH,SCRIPT>"OVERLAY"                  { RTOKEN(OVERLAY); }
 275 <EXPRESSION,BOTH,SCRIPT>"NOLOAD"        { RTOKEN(NOLOAD);}
 276 <EXPRESSION,BOTH,SCRIPT>"DSECT"         { RTOKEN(DSECT);}
 277 <EXPRESSION,BOTH,SCRIPT>"COPY"          { RTOKEN(COPY);}
 278 <EXPRESSION,BOTH,SCRIPT>"INFO"          { RTOKEN(INFO);}
 279 <EXPRESSION,BOTH,SCRIPT>"OVERLAY"       { RTOKEN(OVERLAY);}
 280 <BOTH,SCRIPT>"o"                        { RTOKEN(ORIGIN);}
 281 <BOTH,SCRIPT>"org"                      { RTOKEN(ORIGIN);}
 282 <BOTH,SCRIPT>"l"                        { RTOKEN( LENGTH);}
 283 <BOTH,SCRIPT>"len"                      { RTOKEN( LENGTH);}
 284 <BOTH,SCRIPT>"INCLUDE"                  { RTOKEN(INCLUDE);}
 285 <BOTH,SCRIPT>"PHDRS"                    { RTOKEN (PHDRS); }
 286 <EXPRESSION,BOTH,SCRIPT>"AT"                    { RTOKEN(AT);}
 287 <EXPRESSION,BOTH,SCRIPT>"PROVIDE"               { RTOKEN(PROVIDE); }
 288 <MRI>"#".*\n?\r?                { ++ lineno; }
 289 <MRI>"\n"                       { ++ lineno;  RTOKEN(NEWLINE); }
 290 <MRI>"\r"                       { ++ lineno;  RTOKEN(NEWLINE); }
 291 <MRI>"*".*                      { /* Mri comment line */ }
 292 <MRI>";".*                      { /* Mri comment line */ }
 293 <MRI>"END"                      { RTOKEN(ENDWORD); }
 294 <MRI>"ALIGNMOD"         { RTOKEN(ALIGNMOD);}
 295 <MRI>"ALIGN"            { RTOKEN(ALIGN_K);}
 296 <MRI>"CHIP"                     { RTOKEN(CHIP); }
 297 <MRI>"BASE"                     { RTOKEN(BASE); }
 298 <MRI>"ALIAS"                     { RTOKEN(ALIAS); }
 299 <MRI>"TRUNCATE"                     { RTOKEN(TRUNCATE); }
 300 <MRI>"LOAD"                     { RTOKEN(LOAD); }
 301 <MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
 302 <MRI>"ORDER"                    { RTOKEN(ORDER); }
 303 <MRI>"NAME"                     { RTOKEN(NAMEWORD); }
 304 <MRI>"FORMAT"                   { RTOKEN(FORMAT); }
 305 <MRI>"CASE"                     { RTOKEN(CASE); }
 306 <MRI>"EXTERN"                   { RTOKEN(EXTERN); }
 307 <MRI>"START"                    { RTOKEN(START); }
 308 <MRI>"LIST".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 309 <MRI>"SECT"                     { RTOKEN(SECT); }
 310 <EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE"                  { RTOKEN(ABSOLUTE); }
 311 <MRI>"end"                      { RTOKEN(ENDWORD); }
 312 <MRI>"alignmod"         { RTOKEN(ALIGNMOD);}
 313 <MRI>"align"            { RTOKEN(ALIGN_K);}
 314 <MRI>"chip"                     { RTOKEN(CHIP); }
 315 <MRI>"base"                     { RTOKEN(BASE); }
 316 <MRI>"alias"                     { RTOKEN(ALIAS); }
 317 <MRI>"truncate"                     { RTOKEN(TRUNCATE); }
 318 <MRI>"load"                     { RTOKEN(LOAD); }
 319 <MRI>"public"                   { RTOKEN(PUBLIC); }
 320 <MRI>"order"                    { RTOKEN(ORDER); }
 321 <MRI>"name"                     { RTOKEN(NAMEWORD); }
 322 <MRI>"format"                   { RTOKEN(FORMAT); }
 323 <MRI>"case"                     { RTOKEN(CASE); }
 324 <MRI>"extern"                   { RTOKEN(EXTERN); }
 325 <MRI>"start"                    { RTOKEN(START); }
 326 <MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 327 <MRI>"sect"                     { RTOKEN(SECT); }
 328 <EXPRESSION,BOTH,SCRIPT,MRI>"absolute"                  { RTOKEN(ABSOLUTE); }
 329
 330 <MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*  {
 331 /* Filename without commas, needed to parse mri stuff */
 332                                  yylval.name = buystring(yytext);
 333                                   return NAME;
 334                                 }
 335
 336
 337 <BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}* {
 338                                  yylval.name = buystring(yytext);
 339                                   return NAME;
 340                                 }
 341 <BOTH,EXPRESSION>"-l"{FILENAMECHAR}+ {
 342                                   yylval.name = buystring (yytext + 2);
 343                                   return LNAME;
 344                                 }
 345 <SCRIPT>{WILDCHAR}* { yylval.name = buystring(yytext); return NAME; }
 346
 347 <EXPRESSION,BOTH,SCRIPT>"\""[^\"]*"\"" {
 348                                         /* No matter the state, quotes
 349                                            give what's inside */
 350                                         yylval.name = buystring(yytext+1);
 351                                         yylval.name[yyleng-2] = 0;
 352                                         return NAME;
 353                                 }
 354 <BOTH,SCRIPT,EXPRESSION>"\n"            { lineno++;}
 355 <BOTH,SCRIPT,EXPRESSION>"\r"            { lineno++;}
 356 <MRI,BOTH,SCRIPT,EXPRESSION>[ \t]
 357
 358 <VERS_NODE,VERS_SCRIPT>[:,;]    { return *yytext; }
 359
 360 <VERS_NODE>global               { RTOKEN(GLOBAL); }
 361
 362 <VERS_NODE>local                { RTOKEN(LOCAL); }
 363
 364 <VERS_NODE>{V_IDENTIFIER}       { yylval.name = buystring (yytext);
 365                                   return VERS_IDENTIFIER; }
 366
 367 <VERS_SCRIPT>{V_TAG}            { yylval.name = buystring (yytext);
 368                                   return VERS_TAG; }
 369
 370 <VERS_START>"{"                 { BEGIN(VERS_SCRIPT); return *yytext; }
 371
 372 <VERS_SCRIPT>"{"                { BEGIN(VERS_NODE); return *yytext; }
 373 <VERS_SCRIPT,VERS_NODE>"}"      { BEGIN(VERS_SCRIPT); return *yytext; }
 374
 375 <VERS_START,VERS_NODE,VERS_SCRIPT>[\n\r]        { lineno++; }
 376
 377 <VERS_START,VERS_NODE,VERS_SCRIPT>#.*           { /* Eat up comments */ }
 378
 379 <VERS_START,VERS_NODE,VERS_SCRIPT>[ \t]+        { /* Eat up whitespace */ }
 380
 381 <<EOF>> {
 382   include_stack_ptr--;
 383
 384   if (include_stack_ptr == 0)
 385   {
 386     yyterminate();
 387   }
 388   else
 389   {
 390     yy_switch_to_buffer(include_stack[include_stack_ptr]);
 391
 392   }
 393   BEGIN(SCRIPT);
 394   ldfile_input_filename = file_name_stack[include_stack_ptr - 1];
 395   lineno = lineno_stack[include_stack_ptr - 1];
 396
 397   return END;
 398 }
 399
 400 <SCRIPT,MRI,VERS_START,VERS_SCRIPT,VERS_NODE>.  lex_warn_invalid(" in script", yytext);
 401 <EXPRESSION,DEFSYMEXP,BOTH>.    lex_warn_invalid(" in expression", yytext);
 402
 403 %%
 404 \f
 405
 406 /* Switch flex to reading script file NAME, open on FILE,
 407    saving the current input info on the include stack.  */
 408
 409 void
 410 lex_push_file (file, name)
 411      FILE *file;
 412      const char *name;
 413 {
 414   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 415     {
 416       einfo("%F:includes nested too deeply\n");
 417     }
 418   file_name_stack[include_stack_ptr] = name;
 419   lineno_stack[include_stack_ptr] = 1;
 420   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 421
 422   include_stack_ptr++;
 423   yyin = file;
 424   yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
 425   BEGIN (SCRIPT);
 426 }
 427
 428 /* Return a newly created flex input buffer containing STRING,
 429    which is SIZE bytes long.  */
 430
 431 static YY_BUFFER_STATE
 432 yy_create_string_buffer (string, size)
 433      CONST char *string;
 434      size_t size;
 435 {
 436   YY_BUFFER_STATE b;
 437
 438   /* Calls to m-alloc get turned by sed into xm-alloc.  */
 439   b = (YY_BUFFER_STATE) malloc (sizeof (struct yy_buffer_state));
 440   b->yy_input_file = 0;
 441   b->yy_buf_size = size;
 442
 443   /* yy_ch_buf has to be 2 characters longer than the size given because
 444      we need to put in 2 end-of-buffer characters.  */
 445   b->yy_ch_buf = (char *) malloc ((unsigned) (b->yy_buf_size + 3));
 446
 447   b->yy_ch_buf[0] = '\n';
 448   strcpy (b->yy_ch_buf+1, string);
 449   b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
 450   b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
 451   b->yy_n_chars = size+1;
 452   b->yy_buf_pos = &b->yy_ch_buf[1];
 453
 454   /* flex 2.4.7 changed the interface.  FIXME: We should not be using
 455      a flex internal interface in the first place!  */
 456 #ifdef YY_BUFFER_NEW
 457   b->yy_buffer_status = YY_BUFFER_NEW;
 458 #else
 459   b->yy_eof_status = EOF_NOT_SEEN;
 460 #endif
 461
 462   return b;
 463 }
 464
 465 /* Switch flex to reading from STRING, saving the current input info
 466    on the include stack.  */
 467
 468 void
 469 lex_redirect (string)
 470      CONST char *string;
 471 {
 472   YY_BUFFER_STATE tmp;
 473
 474   yy_init = 0;
 475   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 476     {
 477       einfo("%F: macros nested too deeply\n");
 478     }
 479   file_name_stack[include_stack_ptr] = "redirect";
 480   lineno_stack[include_stack_ptr] = 0;
 481   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 482   include_stack_ptr++;
 483   tmp = yy_create_string_buffer (string, strlen (string));
 484   yy_switch_to_buffer (tmp);
 485   BEGIN (SCRIPT);
 486 }
 487 \f
 488 /* Functions to switch to a different flex start condition,
 489    saving the current start condition on `state_stack'.  */
 490
 491 static int state_stack[MAX_INCLUDE_DEPTH * 2];
 492 static int *state_stack_p = state_stack;
 493
 494 void
 495 ldlex_script ()
 496 {
 497   *(state_stack_p)++ = yy_start;
 498   BEGIN (SCRIPT);
 499 }
 500
 501 void
 502 ldlex_mri_script ()
 503 {
 504   *(state_stack_p)++ = yy_start;
 505   BEGIN (MRI);
 506 }
 507
 508 void
 509 ldlex_version_script ()
 510 {
 511   *(state_stack_p)++ = yy_start;
 512   BEGIN (VERS_START);
 513 }
 514
 515 void
 516 ldlex_version_file ()
 517 {
 518   *(state_stack_p)++ = yy_start;
 519   BEGIN (VERS_SCRIPT);
 520 }
 521
 522 void
 523 ldlex_defsym ()
 524 {
 525   *(state_stack_p)++ = yy_start;
 526   BEGIN (DEFSYMEXP);
 527 }
 528
 529 void
 530 ldlex_expression ()
 531 {
 532   *(state_stack_p)++ = yy_start;
 533   BEGIN (EXPRESSION);
 534 }
 535
 536 void
 537 ldlex_both ()
 538 {
 539   *(state_stack_p)++ = yy_start;
 540   BEGIN (BOTH);
 541 }
 542
 543 void
 544 ldlex_popstate ()
 545 {
 546   yy_start = *(--state_stack_p);
 547 }
 548 \f
 549
 550 /* Place up to MAX_SIZE characters in BUF and return in *RESULT
 551    either the number of characters read, or 0 to indicate EOF.  */
 552
 553 static void
 554 yy_input (buf, result, max_size)
 555      char *buf;
 556      int *result;
 557      int max_size;
 558 {
 559   *result = 0;
 560   if (yy_current_buffer->yy_input_file)
 561     {
 562       if (yyin)
 563         {
 564           *result = read (fileno (yyin), (char *) buf, max_size);
 565           if (*result < 0)
 566             einfo ("%F%P: read in flex scanner failed\n");
 567         }
 568     }
 569 }
 570
 571 /* Eat the rest of a C-style comment.  */
 572
 573 static void
 574 comment ()
 575 {
 576   int c;
 577
 578   while (1)
 579   {
 580     c = input();
 581     while (c != '*' && c != EOF)
 582     {
 583       if (c == '\n' || c == '\r')
 584         lineno++;
 585       c = input();
 586     }
 587
 588     if (c == '*')
 589     {
 590       c = input();
 591       while (c == '*')
 592        c = input();
 593       if (c == '/')
 594        break;                   /* found the end */
 595     }
 596
 597     if (c == '\n' || c == '\r')
 598       lineno++;
 599
 600     if (c == EOF)
 601     {
 602       einfo( "%F%P: EOF in comment\n");
 603       break;
 604     }
 605   }
 606 }
 607
 608 /* Warn the user about a garbage character WHAT in the input
 609    in context WHERE.  */
 610
 611 static void
 612 lex_warn_invalid (where, what)
 613      char *where, *what;
 614 {
 615   char buf[5];
 616
 617   /* If we have found an input file whose format we do not recognize,
 618      and we are therefore treating it as a linker script, and we find
 619      an invalid character, then most likely this is a real object file
 620      of some different format.  Treat it as such.  */
 621   if (ldfile_assumed_script)
 622     {
 623       bfd_set_error (bfd_error_file_not_recognized);
 624       einfo ("%F%s: file not recognized: %E\n", ldfile_input_filename);
 625     }
 626
 627   if (! isprint ((unsigned char) *what))
 628     {
 629       sprintf (buf, "\\%03o", (unsigned int) *what);
 630       what = buf;
 631     }
 632
 633   einfo ("%P:%S: ignoring invalid character `%s'%s\n", what, where);
 634 }