ld/ldlex.l

   1 %{
   2 /* Copyright (C) 1991 Free Software Foundation, Inc.
   3
   4 This file is part of GLD, the Gnu Linker.
   5
   6 GLD is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 1, or (at your option)
   9 any later version.
  10
  11 GLD is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GLD; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /*
  21  *  $Id$
  22
  23  *
  24 */
  25
  26
  27
  28 /*SUPPRESS 529*/
  29 /*SUPPRESS 26*/
  30 /*SUPPRESS 29*/
  31 #define LEXDEBUG 0
  32 #include "sysdep.h"
  33 #include "bfd.h"
  34
  35 #include <ctype.h>
  36 #include "ldlex.h"
  37
  38 #include "ld.h"
  39 #include "ldexp.h"
  40 #include "ldgram.tab.h"
  41 #include "ldmisc.h"
  42
  43 #undef input
  44 #undef unput
  45 #define input lex_input
  46 #define unput lex_unput
  47 int debug;
  48
  49
  50 static boolean ldgram_in_defsym;
  51 static boolean ldgram_had_equals;
  52 extern boolean ldgram_in_script;
  53 static char *command_line;
  54
  55 extern int fgetc();
  56 extern int yyparse();
  57
  58 typedef struct {
  59         char *name;
  60 int value;
  61 } keyword_type;
  62 #define RTOKEN(x)  {  yylval.token = x; return x; }
  63 keyword_type keywords[] =
  64 {
  65 "/", '/',
  66 "MEMORY",MEMORY,
  67 "ORIGIN",ORIGIN,
  68 "BLOCK",BLOCK,
  69 "LENGTH",LENGTH,
  70 "ALIGN",ALIGN_K,
  71 "ADDR",ADDR,
  72 "ENTRY",ENTRY,
  73 "NEXT",NEXT,
  74 "sizeof_headers",SIZEOF_HEADERS,
  75 "SIZEOF_HEADERS",SIZEOF_HEADERS,
  76 "MAP",MAP,
  77 "SIZEOF",SIZEOF,
  78 "TARGET",TARGET_K,
  79 "SEARCH_DIR",SEARCH_DIR,
  80 "OUTPUT",OUTPUT,
  81 "INPUT",INPUT,
  82 "DEFINED",DEFINED,
  83 "CREATE_OBJECT_SYMBOLS",CREATE_OBJECT_SYMBOLS,
  84 "FORCE_COMMON_ALLOCATION",FORCE_COMMON_ALLOCATION,
  85 "SECTIONS",SECTIONS,
  86 "FILL",FILL,
  87 "STARTUP",STARTUP,
  88 "OUTPUT_FORMAT",OUTPUT_FORMAT,
  89 "OUTPUT_ARCH", OUTPUT_ARCH,
  90 "HLL",HLL,
  91 "SYSLIB",SYSLIB,
  92 "FLOAT",FLOAT,
  93 "LONG", LONG,
  94 "SHORT", SHORT,
  95 "BYTE", BYTE,
  96 "NOFLOAT",NOFLOAT,
  97 "o",ORIGIN,
  98 "org",ORIGIN,
  99 "l", LENGTH,
 100 "len", LENGTH,
 101 0,0};
 102 unsigned int lineno;
 103 extern boolean hex_mode;
 104 FILE *ldlex_input_stack;
 105 static unsigned int have_pushback;
 106
 107 #define NPUSHBACK 10
 108 int pushback[NPUSHBACK];
 109 int thischar;
 110 extern char *ldfile_input_filename;
 111 int donehash = 0;
 112 int
 113 lex_input()
 114 {
 115   if (have_pushback > 0)
 116       {
 117         have_pushback --;
 118         return thischar = pushback[have_pushback];
 119       }
 120   if (ldlex_input_stack) {
 121     thischar = fgetc(ldlex_input_stack);
 122
 123     if (thischar == EOF)  {
 124       fclose(ldlex_input_stack);
 125       ldlex_input_stack = (FILE *)NULL;
 126       ldfile_input_filename = (char *)NULL;
 127       /* First char after script eof is a @ so that we can tell the grammer
 128          that we've left */
 129       thischar = '@';
 130
 131     }
 132   }
 133   else if (command_line && *command_line)  {
 134     thischar = *(command_line++);
 135   }
 136   else {
 137  thischar = 0;
 138   }
 139   if(thischar == '\t') thischar = ' ';
 140   if (thischar == '\n') { thischar = ' '; lineno++; }
 141   return thischar ;
 142 }
 143
 144 void
 145 lex_unput(c)
 146 int c;
 147 {
 148   if (have_pushback > NPUSHBACK) {
 149     info("%F%P Too many pushbacks\n");
 150   }
 151
 152   pushback[have_pushback] = c;
 153   have_pushback ++;
 154 }
 155
 156
 157         int
 158 yywrap()
 159          { return 1; }
 160 /*VARARGS*/
 161
 162 void
 163 allprint(x)
 164 int x;
 165 {
 166 fprintf(yyout,"%d",x);
 167 }
 168
 169 void
 170 sprint(x)
 171 char *x;
 172 {
 173 fprintf(yyout,"%s",x);
 174 }
 175
 176 int  thischar;
 177
 178 void parse_line(arg)
 179 char *arg;
 180 {
 181   command_line = arg;
 182   have_pushback = 0;
 183   yyparse();
 184 }
 185
 186
 187
 188 void
 189 parse_args(ac, av)
 190 int ac;
 191 char **av;
 192 {
 193   char *p;
 194   int i;
 195   size_t size = 0;
 196   char *dst;
 197   debug = 1;
 198   for (i= 1; i < ac; i++) {
 199     size += strlen(av[i]) + 2;
 200   }
 201   dst = p = (char *)ldmalloc(size + 2);
 202 /* Put a space arount each option */
 203
 204
 205   for (i =1; i < ac; i++) {
 206
 207     unsigned int s = strlen(av[i]);
 208   *dst++ = ' ';
 209     memcpy(dst, av[i], s);
 210     dst[s] = ' ';
 211     dst += s + 1;
 212   }
 213   *dst  = 0;
 214   parse_line(p);
 215
 216   free(p);
 217
 218
 219 }
 220
 221 static long
 222 DEFUN(number,(default_if_zero,base),
 223       int default_if_zero AND
 224       int base)
 225 {
 226   unsigned  long l = 0;
 227   int ch = yytext[0];
 228   if (ch == 0) {
 229     base = default_if_zero;
 230   }
 231   while (1) {
 232     switch (ch) {
 233     case 'x':
 234       base = 16;
 235       break;
 236     case 'k':
 237     case 'K':
 238       l =l * 1024;
 239       break;
 240     case 'm':
 241     case 'M':
 242       l =l * 1024 * 1024;
 243       break;
 244     case '0': case '1': case '2': case '3': case '4':
 245     case '5': case '6': case '7': case '8': case '9':
 246       l = l * base + ch - '0';
 247       break;
 248     case 'a': case 'b': case 'c' : case 'd' : case 'e': case 'f':
 249       l =l *base + ch - 'a' + 10;
 250       break;
 251     case 'A': case 'B': case 'C' : case 'D' : case 'E': case 'F':
 252       l =l *base + ch - 'A' + 10;
 253       break;
 254     default:
 255       unput(ch);
 256       yylval.integer = l;
 257       return INT;
 258     }
 259 ch = input();
 260   }
 261 }
 262 %}
 263
 264 %a 4000
 265 %o 5000
 266 FILENAMECHAR    [a-zA-Z0-9\/\.\-\_\+\=]
 267 FILENAME        {FILENAMECHAR}+
 268 WHITE           [ \t]+
 269
 270 %%
 271
 272 "@" { return '}'; }
 273 "\ -defsym\ " { ldgram_in_defsym = true; return OPTION_defsym; }
 274 "\ -noinhibit_exec\ " { return OPTION_noinhibit_exec; }
 275 "\ -sort_common\ " { return OPTION_sort_common;}
 276 "\ -format\ " { return OPTION_format; }
 277 "\ -n\ "                { return OPTION_n; }
 278 "\ -r\ "                { return OPTION_r; }
 279 "\ -i\ "                { return OPTION_r; }
 280 "\ -Ur\ "               { return OPTION_Ur; }
 281 "\ -o\ "                { return OPTION_o; }
 282 "\ -g\ "                { return OPTION_g; }
 283 "\ -e\ "                { return OPTION_e; }
 284 "\ -b\ "                { return OPTION_b; }
 285 "\ -dc\ "               { return OPTION_dc; }
 286 "\ -dp\ "               { return OPTION_dp; }
 287 "\ -d\ "                { return OPTION_d; }
 288 "\ -v\ "                { return OPTION_v; }
 289 "\ -M\ "                { return OPTION_M; }
 290 "\ -t\ "                { return OPTION_t; }
 291 "\ -X\ "                { return OPTION_X; }
 292 "\ -x\ "                { return OPTION_x; }
 293 "\ -c\ "                { return OPTION_c; }
 294 "\ -R\ "                { return OPTION_R; }
 295 "\ -u\ "                { return OPTION_u; }
 296 "\ -s\ "            { return OPTION_s; }
 297 "\ -S\ "            { return OPTION_S; }
 298 "\ -B{FILENAME}\ "    { /* Ignored */ }
 299 "\ -l"{FILENAME} {
 300                 yylval.name = buystring(yytext+3);
 301                 return OPTION_l;
 302         }
 303
 304 "\ -L"{FILENAME}        {
 305                 yylval.name = buystring(yytext+3);
 306                 return OPTION_L;
 307          }
 308 "\ -Ttext\ "  {
 309                  yylval.name = ".text";
 310                  return OPTION_Texp;
 311                }
 312 "\ -Tdata\ "  {
 313                  yylval.name = ".data";
 314                  return OPTION_Texp;
 315                }
 316 "\ -Tbss\ "  {
 317                  yylval.name = ".bss";
 318                  return OPTION_Texp;
 319                }
 320
 321 "\ -T"{FILENAME}  {
 322                  yylval.name = buystring(yytext+3);
 323                  return OPTION_Tfile;
 324                }
 325 "\ -T\ "          {
 326                  return OPTION_T;
 327                }
 328
 329 "\ -F"{FILENAME}  {
 330                  return OPTION_F;
 331                }
 332 "\ -F\ "          {
 333                  return OPTION_F;
 334                }
 335
 336 "\ -A"{FILENAME} {
 337                  yylval.name = buystring(yytext+3);
 338                  return OPTION_Aarch;
 339                }
 340
 341 " "             {
 342                  if (ldgram_had_equals == true) {
 343                           ldgram_in_defsym = false;
 344                           ldgram_had_equals = false;
 345                   }
 346         }
 347 "<<="           { RTOKEN(LSHIFTEQ);}
 348 ">>="           { RTOKEN(RSHIFTEQ);}
 349 "||"            { RTOKEN(OROR);}
 350 "=="            { RTOKEN(EQ);}
 351 "!="            { RTOKEN(NE);}
 352 ">="            { RTOKEN(GE);}
 353 "<="            { RTOKEN(LE);}
 354 "<<"            { RTOKEN(LSHIFT);}
 355 ">>"            { RTOKEN(RSHIFT);}
 356 "+="            { RTOKEN(PLUSEQ);}
 357 "-="            { RTOKEN(MINUSEQ);}
 358 "*="            { RTOKEN(MULTEQ);}
 359 "/="            { RTOKEN(DIVEQ);}
 360 "&="            { RTOKEN(ANDEQ);}
 361 "|="            { RTOKEN(OREQ);}
 362 "&&"            { RTOKEN(ANDAND);}
 363 ">"             { RTOKEN('>');}
 364 ","             { RTOKEN(',');}
 365 "&"             { RTOKEN('&');}
 366 "|"             { RTOKEN('|');}
 367 "~"             { RTOKEN('~');}
 368 "!"             { RTOKEN('!');}
 369 "?"             { RTOKEN('?');}
 370 "*"             { RTOKEN('*');}
 371 "%"             { RTOKEN('%');}
 372 "<"             { RTOKEN('<');}
 373 ">"             { RTOKEN('>');}
 374 "}"             { RTOKEN('}') ; }
 375 "{"             { RTOKEN('{'); }
 376 ")"             { RTOKEN(')');}
 377 "("             { RTOKEN('(');}
 378 "]"             { RTOKEN(']');}
 379 "["             { RTOKEN('[');}
 380 ":"             { RTOKEN(':'); }
 381 ";"             { RTOKEN('\;');}
 382 "-"             { RTOKEN('-');}
 383
 384
 385
 386 "/*"            {
 387   while (1) {
 388     int ch;
 389     ch = input();
 390     while (ch != '*') {
 391       ch = input();
 392     }
 393
 394
 395
 396     if (input() == '/') {
 397       break;
 398     }
 399     unput(yytext[yyleng-1]);
 400   }
 401 }
 402
 403 "\""[^\"]*"\"" {
 404
 405   yylval.name = buystring(yytext+1);
 406   yylval.name[yyleng-2] = 0; /* Fry final quote */
 407   return NAME;
 408 }
 409
 410 {FILENAMECHAR} {
 411
 412   boolean loop = false;
 413   int ch;
 414   keyword_type *k;
 415
 416   /* If we're in hex mode (only after a -T) then all we can see are numbers
 417      hex digit we see will be a number. */
 418
 419   if (hex_mode) {
 420     return number(16, 16);
 421   }
 422
 423   /* If we're in a defsym then all things starting with a digit are in
 424      hex */
 425
 426   if (isdigit(yytext[0]) && ldgram_in_defsym) {
 427     return number(16,16);
 428   }
 429
 430
 431   /* Otherwise if we're in a script we will parse the numbers
 432      normally */
 433
 434   if (ldgram_in_script == true && isdigit(yytext[0])) {
 435     return number(8,10);
 436   }
 437
 438   /* Anywhere not in a script or defsym, an opertor is part of a
 439      filename, except / and, which is an operator when on its own */
 440   if (ldgram_in_script == true|| ldgram_in_defsym == true) {
 441
 442     switch (yytext[0]) {
 443       case '*': RTOKEN('*');
 444
 445       case '=': {
 446         ldgram_had_equals = true;
 447         RTOKEN('=');
 448       }
 449         break;
 450      case '/': {
 451        if (ldgram_in_defsym) RTOKEN('/');
 452      }
 453         break;
 454       case '+': RTOKEN('+');
 455       case '-': RTOKEN('-');
 456       case '!': RTOKEN('!');
 457       case '~': RTOKEN('~');
 458       }
 459     }
 460
 461
 462 /* Otherwise this must be a file or a symbol name, and it will continue to be a
 463    filename until we get to something strange. In scripts operator looking
 464    things  are taken to be operators, except /, which will be left
 465  */
 466   ch = input();
 467   while (true)
 468       {
 469         if (ldgram_in_defsym == true) {
 470           switch (ch) {
 471           case '*':
 472           case '=':
 473           case '+':
 474           case '/':
 475           case '-':
 476           case '!':
 477           case '~':
 478             goto quit;
 479           }
 480
 481         }
 482         if(ldgram_in_script == true) {
 483           switch (ch) {
 484           case '*':
 485           case '=':
 486           case '+':
 487           case '-':
 488           case '!':
 489           case '~':
 490             goto quit;
 491           }
 492         }
 493
 494         if (isalpha(ch) || isdigit(ch) || ch == '.'  || ch == '_'  ||
 495             ch == '/' || ch == '.' || ch == '+' || ch == '-' || ch =='=') {
 496           yytext[yyleng++] = ch;
 497         }
 498         else
 499           break;
 500         ch = input();
 501       }
 502  quit:;
 503   yytext[yyleng] = 0;
 504   unput(ch);
 505
 506   for(k = keywords; k ->name != (char *)NULL; k++) {
 507     if (strcmp(k->name, yytext)==0) {
 508       yylval.token = k->value;
 509       return k->value;
 510     }
 511   }
 512   yylval.name = buystring(yytext);
 513   return NAME;
 514 }
 515
 516
 517
 518
 519
 520 %%