| 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 | extern boolean ldgram_in_expression; |
| 50 | extern boolean ldgram_in_defsym; |
| 51 | extern boolean ldgram_in_script; |
| 52 | static char *command_line; |
| 53 | |
| 54 | extern int fgetc(); |
| 55 | extern int yyparse(); |
| 56 | |
| 57 | typedef struct { |
| 58 | char *name; |
| 59 | int value; |
| 60 | } keyword_type; |
| 61 | #define RTOKEN(x) { yylval.token = x; return x; } |
| 62 | keyword_type keywords[] = |
| 63 | { |
| 64 | "MEMORY",MEMORY, |
| 65 | "ORIGIN",ORIGIN, |
| 66 | "BLOCK",BLOCK, |
| 67 | "LENGTH",LENGTH, |
| 68 | "ALIGN",ALIGN_K, |
| 69 | "SUBSECTION_ALIGN",SUBSECTION_ALIGN, |
| 70 | "ADDR",ADDR, |
| 71 | "ENTRY",ENTRY, |
| 72 | "SCRIPT", SCRIPT, |
| 73 | "ENDSCRIPT", ENDSCRIPT, |
| 74 | "NEXT",NEXT, |
| 75 | "MAP",MAP, |
| 76 | "SIZEOF",SIZEOF, |
| 77 | "TARGET",TARGET_K, |
| 78 | "SEARCH_DIR",SEARCH_DIR, |
| 79 | "OUTPUT",OUTPUT, |
| 80 | "INPUT",INPUT, |
| 81 | "DEFINED",DEFINED, |
| 82 | "CREATE_OBJECT_SYMBOLS",CREATE_OBJECT_SYMBOLS, |
| 83 | "FORCE_COMMON_ALLOCATION",FORCE_COMMON_ALLOCATION, |
| 84 | "SECTIONS",SECTIONS, |
| 85 | "FILL",FILL, |
| 86 | "STARTUP",STARTUP, |
| 87 | "OUTPUT_FORMAT",OUTPUT_FORMAT, |
| 88 | "HLL",HLL, |
| 89 | "SYSLIB",SYSLIB, |
| 90 | "FLOAT",FLOAT, |
| 91 | "LONG", LONG, |
| 92 | "SHORT", SHORT, |
| 93 | "BYTE", BYTE, |
| 94 | "NOFLOAT",NOFLOAT, |
| 95 | "o",ORIGIN, |
| 96 | "org",ORIGIN, |
| 97 | "l", LENGTH, |
| 98 | "len", LENGTH, |
| 99 | 0,0}; |
| 100 | unsigned int lineno; |
| 101 | extern boolean hex_mode; |
| 102 | FILE *ldlex_input_stack; |
| 103 | static unsigned int have_pushback; |
| 104 | #define NPUSHBACK 10 |
| 105 | int pushback[NPUSHBACK]; |
| 106 | int thischar; |
| 107 | extern char *ldfile_input_filename; |
| 108 | int donehash = 0; |
| 109 | int |
| 110 | lex_input() |
| 111 | { |
| 112 | if (have_pushback > 0) |
| 113 | { |
| 114 | have_pushback --; |
| 115 | return thischar = pushback[have_pushback]; |
| 116 | } |
| 117 | if (ldlex_input_stack) { |
| 118 | thischar = fgetc(ldlex_input_stack); |
| 119 | |
| 120 | if (thischar == EOF) { |
| 121 | fclose(ldlex_input_stack); |
| 122 | ldlex_input_stack = (FILE *)NULL; |
| 123 | ldfile_input_filename = (char *)NULL; |
| 124 | /* First char after script eof is a @ so that we can tell the grammer |
| 125 | that we've eft */ |
| 126 | thischar = '@'; |
| 127 | |
| 128 | } |
| 129 | } |
| 130 | else if (command_line && *command_line) { |
| 131 | thischar = *(command_line++); |
| 132 | } |
| 133 | else { |
| 134 | thischar = 0; |
| 135 | } |
| 136 | if(thischar == '\t') thischar = ' '; |
| 137 | if (thischar == '\n') { thischar = ' '; lineno++; } |
| 138 | return thischar ; |
| 139 | } |
| 140 | |
| 141 | void |
| 142 | lex_unput(c) |
| 143 | int c; |
| 144 | { |
| 145 | if (have_pushback > NPUSHBACK) { |
| 146 | info("%F%P Too many pushbacks\n"); |
| 147 | } |
| 148 | |
| 149 | pushback[have_pushback] = c; |
| 150 | have_pushback ++; |
| 151 | } |
| 152 | |
| 153 | |
| 154 | int |
| 155 | yywrap() |
| 156 | { return 1; } |
| 157 | /*VARARGS*/ |
| 158 | |
| 159 | void |
| 160 | allprint(x) |
| 161 | int x; |
| 162 | { |
| 163 | fprintf(yyout,"%d",x); |
| 164 | } |
| 165 | |
| 166 | void |
| 167 | sprint(x) |
| 168 | char *x; |
| 169 | { |
| 170 | fprintf(yyout,"%s",x); |
| 171 | } |
| 172 | |
| 173 | int thischar; |
| 174 | |
| 175 | void parse_line(arg) |
| 176 | char *arg; |
| 177 | { |
| 178 | command_line = arg; |
| 179 | have_pushback = 0; |
| 180 | yyparse(); |
| 181 | } |
| 182 | |
| 183 | |
| 184 | |
| 185 | void |
| 186 | parse_args(ac, av) |
| 187 | int ac; |
| 188 | char **av; |
| 189 | { |
| 190 | char *p; |
| 191 | int i; |
| 192 | size_t size = 0; |
| 193 | char *dst; |
| 194 | debug = 1; |
| 195 | for (i= 1; i < ac; i++) { |
| 196 | size += strlen(av[i]) + 2; |
| 197 | } |
| 198 | dst = p = (char *)ldmalloc(size + 2); |
| 199 | /* Put a space arount each option */ |
| 200 | |
| 201 | |
| 202 | for (i =1; i < ac; i++) { |
| 203 | |
| 204 | unsigned int s = strlen(av[i]); |
| 205 | *dst++ = ' '; |
| 206 | memcpy(dst, av[i], s); |
| 207 | dst[s] = ' '; |
| 208 | dst += s + 1; |
| 209 | } |
| 210 | *dst = 0; |
| 211 | parse_line(p); |
| 212 | |
| 213 | free(p); |
| 214 | |
| 215 | |
| 216 | } |
| 217 | |
| 218 | long number(text, base) |
| 219 | char *text; |
| 220 | int base; |
| 221 | { |
| 222 | unsigned long l = 0; |
| 223 | char *p; |
| 224 | for (p = text; *p != 0; p++) { |
| 225 | if (*p == 'K') { |
| 226 | l =l * 1024; |
| 227 | } |
| 228 | else if(*p== 'M') { |
| 229 | l =l * 1024 * 1024; |
| 230 | } |
| 231 | else { |
| 232 | l =l * base; |
| 233 | if (isdigit(*p)) { |
| 234 | l += *p - '0'; |
| 235 | } |
| 236 | else if (islower(*p)) { |
| 237 | l += *p - 'a' + 10; |
| 238 | } |
| 239 | else { |
| 240 | l += *p - 'A' + 10; |
| 241 | } |
| 242 | } |
| 243 | } |
| 244 | return l; |
| 245 | } |
| 246 | %} |
| 247 | |
| 248 | %a 4000 |
| 249 | %o 5000 |
| 250 | FILENAMECHAR [a-zA-Z0-9\/\.\-\_\+\=] |
| 251 | FILENAME {FILENAMECHAR}+ |
| 252 | |
| 253 | |
| 254 | WHITE [ \t]+ |
| 255 | |
| 256 | %% |
| 257 | |
| 258 | "@" { return ENDSCRIPT; } |
| 259 | "\ -defsym\ " { return OPTION_defsym; } |
| 260 | "\ -noinhibit_exec\ " { return OPTION_noinhibit_exec; } |
| 261 | "\ -format\ " { return OPTION_format; } |
| 262 | "\ -n\ " { return OPTION_n; } |
| 263 | "\ -r\ " { return OPTION_r; } |
| 264 | "\ -Ur\ " { return OPTION_Ur; } |
| 265 | "\ -o\ " { return OPTION_o; } |
| 266 | "\ -g\ " { return OPTION_g; } |
| 267 | "\ -e\ " { return OPTION_e; } |
| 268 | "\ -b\ " { return OPTION_b; } |
| 269 | "\ -dc\ " { return OPTION_dc; } |
| 270 | "\ -dp\ " { return OPTION_dp; } |
| 271 | "\ -d\ " { return OPTION_d; } |
| 272 | "\ -v\ " { return OPTION_v; } |
| 273 | "\ -M\ " { return OPTION_M; } |
| 274 | "\ -t\ " { return OPTION_t; } |
| 275 | "\ -X\ " { return OPTION_X; } |
| 276 | "\ -x\ " { return OPTION_x; } |
| 277 | "\ -c\ " { return OPTION_c; } |
| 278 | "\ -R\ " { return OPTION_R; } |
| 279 | "\ -u\ " { return OPTION_u; } |
| 280 | "\ -s\ " { return OPTION_s; } |
| 281 | "\ -S\ " { return OPTION_S; } |
| 282 | "\ -l"{FILENAME} { |
| 283 | yylval.name = buystring(yytext+3); |
| 284 | return OPTION_l; |
| 285 | } |
| 286 | |
| 287 | "\ -L"{FILENAME} { |
| 288 | yylval.name = buystring(yytext+3); |
| 289 | return OPTION_L; |
| 290 | } |
| 291 | "\ -Ttext\ " { |
| 292 | yylval.name = ".text"; |
| 293 | return OPTION_Texp; |
| 294 | } |
| 295 | "\ -Tdata\ " { |
| 296 | yylval.name = ".data"; |
| 297 | return OPTION_Texp; |
| 298 | } |
| 299 | "\ -Tbss\ " { |
| 300 | yylval.name = ".bss"; |
| 301 | return OPTION_Texp; |
| 302 | } |
| 303 | |
| 304 | "\ -T"{FILENAME} { |
| 305 | yylval.name = buystring(yytext+3); |
| 306 | return OPTION_Tfile; |
| 307 | } |
| 308 | "\ -T\ " { |
| 309 | return OPTION_T; |
| 310 | } |
| 311 | |
| 312 | "\ -F"{FILENAME} { |
| 313 | return OPTION_F; |
| 314 | } |
| 315 | "\ -F\ " { |
| 316 | return OPTION_F; |
| 317 | } |
| 318 | |
| 319 | "\ -A"{FILENAME} { |
| 320 | yylval.name = buystring(yytext+3); |
| 321 | return OPTION_Aarch; |
| 322 | } |
| 323 | " " { } |
| 324 | "<<=" { RTOKEN(LSHIFTEQ);} |
| 325 | ">>=" { RTOKEN(RSHIFTEQ);} |
| 326 | "||" { RTOKEN(OROR);} |
| 327 | "==" { RTOKEN(EQ);} |
| 328 | "!=" { RTOKEN(NE);} |
| 329 | ">=" { RTOKEN(GE);} |
| 330 | "<=" { RTOKEN(LE);} |
| 331 | "<<" { RTOKEN(LSHIFT);} |
| 332 | ">>" { RTOKEN(RSHIFT);} |
| 333 | "+=" { RTOKEN(PLUSEQ);} |
| 334 | "-=" { RTOKEN(MINUSEQ);} |
| 335 | "*=" { RTOKEN(MULTEQ);} |
| 336 | "/=" { RTOKEN(DIVEQ);} |
| 337 | "&=" { RTOKEN(ANDEQ);} |
| 338 | "|=" { RTOKEN(OREQ);} |
| 339 | "&&" { RTOKEN(ANDAND);} |
| 340 | ">" { RTOKEN('>');} |
| 341 | "," { RTOKEN(',');} |
| 342 | "&" { RTOKEN('&');} |
| 343 | "|" { RTOKEN('|');} |
| 344 | "~" { RTOKEN('~');} |
| 345 | "!" { RTOKEN('!');} |
| 346 | "?" { RTOKEN('?');} |
| 347 | "*" { RTOKEN('*');} |
| 348 | "%" { RTOKEN('%');} |
| 349 | "<" { RTOKEN('<');} |
| 350 | ">" { RTOKEN('>');} |
| 351 | "}" { RTOKEN('}') ; } |
| 352 | "{" { RTOKEN('{'); } |
| 353 | ")" { RTOKEN(')');} |
| 354 | "(" { RTOKEN('(');} |
| 355 | "]" { RTOKEN(']');} |
| 356 | "[" { RTOKEN('[');} |
| 357 | ":" { RTOKEN(':'); } |
| 358 | ";" { RTOKEN('\;');} |
| 359 | "-" { RTOKEN('-');} |
| 360 | |
| 361 | |
| 362 | |
| 363 | "/*" { |
| 364 | while (1) { |
| 365 | int ch; |
| 366 | ch = input(); |
| 367 | while (ch != '*') { |
| 368 | ch = input(); |
| 369 | } |
| 370 | |
| 371 | |
| 372 | |
| 373 | if (input() == '/') { |
| 374 | break; |
| 375 | } |
| 376 | unput(yytext[yyleng-1]); |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | "\""[^\"]*"\"" { |
| 381 | |
| 382 | yylval.name = buystring(yytext+1); |
| 383 | yylval.name[yyleng-2] = 0; /* Fry final quote */ |
| 384 | return NAME; |
| 385 | } |
| 386 | |
| 387 | "\#"{WHITE}*{FILENAMECHAR}+ { |
| 388 | char *p = yytext+1; |
| 389 | while(*p ==' ' || *p == '\t') p++; |
| 390 | yylval.name = buystring(p); |
| 391 | return NAME; |
| 392 | } |
| 393 | {FILENAMECHAR} { |
| 394 | |
| 395 | boolean loop = false; |
| 396 | /* |
| 397 | Tokenize a name, this is really pain, since a name can be a |
| 398 | filename or a symbol name. filenames have slashes and stuff whist |
| 399 | in an expression those things are seperate tokens. We hack this by |
| 400 | setting ldlang_in_script when we are expecting a symbol, so that |
| 401 | [/+-] get taken to be seperate tokens. An extra gotcha is |
| 402 | expressions after defsyms, we only allow +s and -s in a defsym |
| 403 | expression, so -defsym foo=bar+9 /file.o is parsed ok. |
| 404 | |
| 405 | The more I think about this the more I hate it. I've got a problem |
| 406 | now with the = sign, what should I do ? imagine: |
| 407 | __start=.; |
| 408 | You'd think that was pretty unambiguous wouldn't you. Well it's |
| 409 | not since __start=. is (at the moment) a perfectly valid |
| 410 | filename. And in some cases we don't know what's going on. I'm |
| 411 | going to have to hack this. If we see a '/' before the = sign then |
| 412 | we say we've got an = in a filename, otherwise it's an operator. |
| 413 | (later) |
| 414 | That's it, I've had enough. From now on, an =s on a command line |
| 415 | will be taken to be part of a file name unless its in a defsym, |
| 416 | and an = in a file will be taken to be an operator. |
| 417 | */ |
| 418 | int ch; |
| 419 | keyword_type *k; |
| 420 | |
| 421 | if ((hex_mode && isxdigit(yytext[0])) |
| 422 | || |
| 423 | (isdigit(yytext[0]) && (ldgram_in_expression == true || ldgram_in_script == true))) { |
| 424 | char *start = yytext; |
| 425 | unsigned int base = 10; |
| 426 | if (hex_mode == true) base = 16; |
| 427 | if (yytext[0] == '0') { |
| 428 | base = 8; |
| 429 | } |
| 430 | ch = input(); |
| 431 | while (isxdigit(ch) |
| 432 | || ch == 'x' |
| 433 | || ch == 'X' |
| 434 | || ch == 'M' |
| 435 | ) |
| 436 | { |
| 437 | if (ch == 'x' || ch == 'X') { |
| 438 | base = 16; |
| 439 | start = yytext + yyleng; |
| 440 | } |
| 441 | else { |
| 442 | yytext[yyleng++] = ch; |
| 443 | } |
| 444 | ch = input(); |
| 445 | } |
| 446 | yytext[yyleng] = 0; |
| 447 | unput(ch); |
| 448 | yylval.integer = number(start, base); |
| 449 | return INT; |
| 450 | } |
| 451 | |
| 452 | if (ldfile_input_filename) { |
| 453 | /* We're inside a file */ |
| 454 | if (yytext[0]== '=') { |
| 455 | RTOKEN('='); |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | |
| 460 | |
| 461 | /* Otherwise we only notice special things if were in an |
| 462 | expression */ |
| 463 | |
| 464 | if (ldgram_in_expression) { |
| 465 | if (yytext[0] != '/' || ldgram_in_defsym == false) { |
| 466 | switch (yytext[0]) { |
| 467 | case '/': RTOKEN('/'); |
| 468 | case '=': RTOKEN('='); |
| 469 | case '+': RTOKEN('+'); |
| 470 | case '-': RTOKEN('-'); |
| 471 | } |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | ch = input(); |
| 476 | while (true) |
| 477 | { |
| 478 | if (isalpha(ch) || isdigit(ch) || ch == '.' || ch == '_' ) { |
| 479 | yytext[yyleng++] = ch; |
| 480 | } |
| 481 | else if (ch == '=' && ldgram_in_script) { |
| 482 | /* An = within a script is always taken to be an operator */ |
| 483 | break; |
| 484 | } |
| 485 | else if (ch == '+' || ch == '-' || ch == '/' || ch == '=') { |
| 486 | if (ldgram_in_expression) break; |
| 487 | yytext[yyleng++] = ch; |
| 488 | } |
| 489 | else |
| 490 | break; |
| 491 | ch = input(); |
| 492 | } |
| 493 | |
| 494 | yytext[yyleng] = 0; |
| 495 | unput(ch); |
| 496 | /* Filenames of just =signs are tokens */ |
| 497 | if (yyleng == 1 && yytext[0] == '=') { |
| 498 | RTOKEN('='); |
| 499 | } |
| 500 | for(k = keywords; k ->name != (char *)NULL; k++) { |
| 501 | |
| 502 | if (strcmp(k->name, yytext)==0) { |
| 503 | yylval.token = k->value; |
| 504 | return k->value; |
| 505 | } |
| 506 | } |
| 507 | yylval.name = buystring(yytext); |
| 508 | return NAME; |
| 509 | } |
| 510 | |
| 511 | |
| 512 | |
| 513 | |
| 514 | |
| 515 | %% |