| 1 | // script.cc -- handle linker scripts for gold. |
| 2 | |
| 3 | // Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
| 4 | // Written by Ian Lance Taylor <iant@google.com>. |
| 5 | |
| 6 | // This file is part of gold. |
| 7 | |
| 8 | // This program 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 3 of the License, or |
| 11 | // (at your option) any later version. |
| 12 | |
| 13 | // This program 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 this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | // MA 02110-1301, USA. |
| 22 | |
| 23 | #include "gold.h" |
| 24 | |
| 25 | #include <cstdio> |
| 26 | #include <cstdlib> |
| 27 | #include <cstring> |
| 28 | #include <fnmatch.h> |
| 29 | #include <string> |
| 30 | #include <vector> |
| 31 | #include "filenames.h" |
| 32 | |
| 33 | #include "elfcpp.h" |
| 34 | #include "demangle.h" |
| 35 | #include "dirsearch.h" |
| 36 | #include "options.h" |
| 37 | #include "fileread.h" |
| 38 | #include "workqueue.h" |
| 39 | #include "readsyms.h" |
| 40 | #include "parameters.h" |
| 41 | #include "layout.h" |
| 42 | #include "symtab.h" |
| 43 | #include "script.h" |
| 44 | #include "script-c.h" |
| 45 | |
| 46 | namespace gold |
| 47 | { |
| 48 | |
| 49 | // A token read from a script file. We don't implement keywords here; |
| 50 | // all keywords are simply represented as a string. |
| 51 | |
| 52 | class Token |
| 53 | { |
| 54 | public: |
| 55 | // Token classification. |
| 56 | enum Classification |
| 57 | { |
| 58 | // Token is invalid. |
| 59 | TOKEN_INVALID, |
| 60 | // Token indicates end of input. |
| 61 | TOKEN_EOF, |
| 62 | // Token is a string of characters. |
| 63 | TOKEN_STRING, |
| 64 | // Token is a quoted string of characters. |
| 65 | TOKEN_QUOTED_STRING, |
| 66 | // Token is an operator. |
| 67 | TOKEN_OPERATOR, |
| 68 | // Token is a number (an integer). |
| 69 | TOKEN_INTEGER |
| 70 | }; |
| 71 | |
| 72 | // We need an empty constructor so that we can put this STL objects. |
| 73 | Token() |
| 74 | : classification_(TOKEN_INVALID), value_(NULL), value_length_(0), |
| 75 | opcode_(0), lineno_(0), charpos_(0) |
| 76 | { } |
| 77 | |
| 78 | // A general token with no value. |
| 79 | Token(Classification classification, int lineno, int charpos) |
| 80 | : classification_(classification), value_(NULL), value_length_(0), |
| 81 | opcode_(0), lineno_(lineno), charpos_(charpos) |
| 82 | { |
| 83 | gold_assert(classification == TOKEN_INVALID |
| 84 | || classification == TOKEN_EOF); |
| 85 | } |
| 86 | |
| 87 | // A general token with a value. |
| 88 | Token(Classification classification, const char* value, size_t length, |
| 89 | int lineno, int charpos) |
| 90 | : classification_(classification), value_(value), value_length_(length), |
| 91 | opcode_(0), lineno_(lineno), charpos_(charpos) |
| 92 | { |
| 93 | gold_assert(classification != TOKEN_INVALID |
| 94 | && classification != TOKEN_EOF); |
| 95 | } |
| 96 | |
| 97 | // A token representing an operator. |
| 98 | Token(int opcode, int lineno, int charpos) |
| 99 | : classification_(TOKEN_OPERATOR), value_(NULL), value_length_(0), |
| 100 | opcode_(opcode), lineno_(lineno), charpos_(charpos) |
| 101 | { } |
| 102 | |
| 103 | // Return whether the token is invalid. |
| 104 | bool |
| 105 | is_invalid() const |
| 106 | { return this->classification_ == TOKEN_INVALID; } |
| 107 | |
| 108 | // Return whether this is an EOF token. |
| 109 | bool |
| 110 | is_eof() const |
| 111 | { return this->classification_ == TOKEN_EOF; } |
| 112 | |
| 113 | // Return the token classification. |
| 114 | Classification |
| 115 | classification() const |
| 116 | { return this->classification_; } |
| 117 | |
| 118 | // Return the line number at which the token starts. |
| 119 | int |
| 120 | lineno() const |
| 121 | { return this->lineno_; } |
| 122 | |
| 123 | // Return the character position at this the token starts. |
| 124 | int |
| 125 | charpos() const |
| 126 | { return this->charpos_; } |
| 127 | |
| 128 | // Get the value of a token. |
| 129 | |
| 130 | const char* |
| 131 | string_value(size_t* length) const |
| 132 | { |
| 133 | gold_assert(this->classification_ == TOKEN_STRING |
| 134 | || this->classification_ == TOKEN_QUOTED_STRING); |
| 135 | *length = this->value_length_; |
| 136 | return this->value_; |
| 137 | } |
| 138 | |
| 139 | int |
| 140 | operator_value() const |
| 141 | { |
| 142 | gold_assert(this->classification_ == TOKEN_OPERATOR); |
| 143 | return this->opcode_; |
| 144 | } |
| 145 | |
| 146 | uint64_t |
| 147 | integer_value() const |
| 148 | { |
| 149 | gold_assert(this->classification_ == TOKEN_INTEGER); |
| 150 | // Null terminate. |
| 151 | std::string s(this->value_, this->value_length_); |
| 152 | return strtoull(s.c_str(), NULL, 0); |
| 153 | } |
| 154 | |
| 155 | private: |
| 156 | // The token classification. |
| 157 | Classification classification_; |
| 158 | // The token value, for TOKEN_STRING or TOKEN_QUOTED_STRING or |
| 159 | // TOKEN_INTEGER. |
| 160 | const char* value_; |
| 161 | // The length of the token value. |
| 162 | size_t value_length_; |
| 163 | // The token value, for TOKEN_OPERATOR. |
| 164 | int opcode_; |
| 165 | // The line number where this token started (one based). |
| 166 | int lineno_; |
| 167 | // The character position within the line where this token started |
| 168 | // (one based). |
| 169 | int charpos_; |
| 170 | }; |
| 171 | |
| 172 | // This class handles lexing a file into a sequence of tokens. |
| 173 | |
| 174 | class Lex |
| 175 | { |
| 176 | public: |
| 177 | // We unfortunately have to support different lexing modes, because |
| 178 | // when reading different parts of a linker script we need to parse |
| 179 | // things differently. |
| 180 | enum Mode |
| 181 | { |
| 182 | // Reading an ordinary linker script. |
| 183 | LINKER_SCRIPT, |
| 184 | // Reading an expression in a linker script. |
| 185 | EXPRESSION, |
| 186 | // Reading a version script. |
| 187 | VERSION_SCRIPT, |
| 188 | // Reading a --dynamic-list file. |
| 189 | DYNAMIC_LIST |
| 190 | }; |
| 191 | |
| 192 | Lex(const char* input_string, size_t input_length, int parsing_token) |
| 193 | : input_string_(input_string), input_length_(input_length), |
| 194 | current_(input_string), mode_(LINKER_SCRIPT), |
| 195 | first_token_(parsing_token), token_(), |
| 196 | lineno_(1), linestart_(input_string) |
| 197 | { } |
| 198 | |
| 199 | // Read a file into a string. |
| 200 | static void |
| 201 | read_file(Input_file*, std::string*); |
| 202 | |
| 203 | // Return the next token. |
| 204 | const Token* |
| 205 | next_token(); |
| 206 | |
| 207 | // Return the current lexing mode. |
| 208 | Lex::Mode |
| 209 | mode() const |
| 210 | { return this->mode_; } |
| 211 | |
| 212 | // Set the lexing mode. |
| 213 | void |
| 214 | set_mode(Mode mode) |
| 215 | { this->mode_ = mode; } |
| 216 | |
| 217 | private: |
| 218 | Lex(const Lex&); |
| 219 | Lex& operator=(const Lex&); |
| 220 | |
| 221 | // Make a general token with no value at the current location. |
| 222 | Token |
| 223 | make_token(Token::Classification c, const char* start) const |
| 224 | { return Token(c, this->lineno_, start - this->linestart_ + 1); } |
| 225 | |
| 226 | // Make a general token with a value at the current location. |
| 227 | Token |
| 228 | make_token(Token::Classification c, const char* v, size_t len, |
| 229 | const char* start) |
| 230 | const |
| 231 | { return Token(c, v, len, this->lineno_, start - this->linestart_ + 1); } |
| 232 | |
| 233 | // Make an operator token at the current location. |
| 234 | Token |
| 235 | make_token(int opcode, const char* start) const |
| 236 | { return Token(opcode, this->lineno_, start - this->linestart_ + 1); } |
| 237 | |
| 238 | // Make an invalid token at the current location. |
| 239 | Token |
| 240 | make_invalid_token(const char* start) |
| 241 | { return this->make_token(Token::TOKEN_INVALID, start); } |
| 242 | |
| 243 | // Make an EOF token at the current location. |
| 244 | Token |
| 245 | make_eof_token(const char* start) |
| 246 | { return this->make_token(Token::TOKEN_EOF, start); } |
| 247 | |
| 248 | // Return whether C can be the first character in a name. C2 is the |
| 249 | // next character, since we sometimes need that. |
| 250 | inline bool |
| 251 | can_start_name(char c, char c2); |
| 252 | |
| 253 | // If C can appear in a name which has already started, return a |
| 254 | // pointer to a character later in the token or just past |
| 255 | // it. Otherwise, return NULL. |
| 256 | inline const char* |
| 257 | can_continue_name(const char* c); |
| 258 | |
| 259 | // Return whether C, C2, C3 can start a hex number. |
| 260 | inline bool |
| 261 | can_start_hex(char c, char c2, char c3); |
| 262 | |
| 263 | // If C can appear in a hex number which has already started, return |
| 264 | // a pointer to a character later in the token or just past |
| 265 | // it. Otherwise, return NULL. |
| 266 | inline const char* |
| 267 | can_continue_hex(const char* c); |
| 268 | |
| 269 | // Return whether C can start a non-hex number. |
| 270 | static inline bool |
| 271 | can_start_number(char c); |
| 272 | |
| 273 | // If C can appear in a decimal number which has already started, |
| 274 | // return a pointer to a character later in the token or just past |
| 275 | // it. Otherwise, return NULL. |
| 276 | inline const char* |
| 277 | can_continue_number(const char* c) |
| 278 | { return Lex::can_start_number(*c) ? c + 1 : NULL; } |
| 279 | |
| 280 | // If C1 C2 C3 form a valid three character operator, return the |
| 281 | // opcode. Otherwise return 0. |
| 282 | static inline int |
| 283 | three_char_operator(char c1, char c2, char c3); |
| 284 | |
| 285 | // If C1 C2 form a valid two character operator, return the opcode. |
| 286 | // Otherwise return 0. |
| 287 | static inline int |
| 288 | two_char_operator(char c1, char c2); |
| 289 | |
| 290 | // If C1 is a valid one character operator, return the opcode. |
| 291 | // Otherwise return 0. |
| 292 | static inline int |
| 293 | one_char_operator(char c1); |
| 294 | |
| 295 | // Read the next token. |
| 296 | Token |
| 297 | get_token(const char**); |
| 298 | |
| 299 | // Skip a C style /* */ comment. Return false if the comment did |
| 300 | // not end. |
| 301 | bool |
| 302 | skip_c_comment(const char**); |
| 303 | |
| 304 | // Skip a line # comment. Return false if there was no newline. |
| 305 | bool |
| 306 | skip_line_comment(const char**); |
| 307 | |
| 308 | // Build a token CLASSIFICATION from all characters that match |
| 309 | // CAN_CONTINUE_FN. The token starts at START. Start matching from |
| 310 | // MATCH. Set *PP to the character following the token. |
| 311 | inline Token |
| 312 | gather_token(Token::Classification, |
| 313 | const char* (Lex::*can_continue_fn)(const char*), |
| 314 | const char* start, const char* match, const char** pp); |
| 315 | |
| 316 | // Build a token from a quoted string. |
| 317 | Token |
| 318 | gather_quoted_string(const char** pp); |
| 319 | |
| 320 | // The string we are tokenizing. |
| 321 | const char* input_string_; |
| 322 | // The length of the string. |
| 323 | size_t input_length_; |
| 324 | // The current offset into the string. |
| 325 | const char* current_; |
| 326 | // The current lexing mode. |
| 327 | Mode mode_; |
| 328 | // The code to use for the first token. This is set to 0 after it |
| 329 | // is used. |
| 330 | int first_token_; |
| 331 | // The current token. |
| 332 | Token token_; |
| 333 | // The current line number. |
| 334 | int lineno_; |
| 335 | // The start of the current line in the string. |
| 336 | const char* linestart_; |
| 337 | }; |
| 338 | |
| 339 | // Read the whole file into memory. We don't expect linker scripts to |
| 340 | // be large, so we just use a std::string as a buffer. We ignore the |
| 341 | // data we've already read, so that we read aligned buffers. |
| 342 | |
| 343 | void |
| 344 | Lex::read_file(Input_file* input_file, std::string* contents) |
| 345 | { |
| 346 | off_t filesize = input_file->file().filesize(); |
| 347 | contents->clear(); |
| 348 | contents->reserve(filesize); |
| 349 | |
| 350 | off_t off = 0; |
| 351 | unsigned char buf[BUFSIZ]; |
| 352 | while (off < filesize) |
| 353 | { |
| 354 | off_t get = BUFSIZ; |
| 355 | if (get > filesize - off) |
| 356 | get = filesize - off; |
| 357 | input_file->file().read(off, get, buf); |
| 358 | contents->append(reinterpret_cast<char*>(&buf[0]), get); |
| 359 | off += get; |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | // Return whether C can be the start of a name, if the next character |
| 364 | // is C2. A name can being with a letter, underscore, period, or |
| 365 | // dollar sign. Because a name can be a file name, we also permit |
| 366 | // forward slash, backslash, and tilde. Tilde is the tricky case |
| 367 | // here; GNU ld also uses it as a bitwise not operator. It is only |
| 368 | // recognized as the operator if it is not immediately followed by |
| 369 | // some character which can appear in a symbol. That is, when we |
| 370 | // don't know that we are looking at an expression, "~0" is a file |
| 371 | // name, and "~ 0" is an expression using bitwise not. We are |
| 372 | // compatible. |
| 373 | |
| 374 | inline bool |
| 375 | Lex::can_start_name(char c, char c2) |
| 376 | { |
| 377 | switch (c) |
| 378 | { |
| 379 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': |
| 380 | case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': |
| 381 | case 'M': case 'N': case 'O': case 'Q': case 'P': case 'R': |
| 382 | case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': |
| 383 | case 'Y': case 'Z': |
| 384 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
| 385 | case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': |
| 386 | case 'm': case 'n': case 'o': case 'q': case 'p': case 'r': |
| 387 | case 's': case 't': case 'u': case 'v': case 'w': case 'x': |
| 388 | case 'y': case 'z': |
| 389 | case '_': case '.': case '$': |
| 390 | return true; |
| 391 | |
| 392 | case '/': case '\\': |
| 393 | return this->mode_ == LINKER_SCRIPT; |
| 394 | |
| 395 | case '~': |
| 396 | return this->mode_ == LINKER_SCRIPT && can_continue_name(&c2); |
| 397 | |
| 398 | case '*': case '[': |
| 399 | return (this->mode_ == VERSION_SCRIPT |
| 400 | || this->mode_ == DYNAMIC_LIST |
| 401 | || (this->mode_ == LINKER_SCRIPT |
| 402 | && can_continue_name(&c2))); |
| 403 | |
| 404 | default: |
| 405 | return false; |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | // Return whether C can continue a name which has already started. |
| 410 | // Subsequent characters in a name are the same as the leading |
| 411 | // characters, plus digits and "=+-:[],?*". So in general the linker |
| 412 | // script language requires spaces around operators, unless we know |
| 413 | // that we are parsing an expression. |
| 414 | |
| 415 | inline const char* |
| 416 | Lex::can_continue_name(const char* c) |
| 417 | { |
| 418 | switch (*c) |
| 419 | { |
| 420 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': |
| 421 | case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': |
| 422 | case 'M': case 'N': case 'O': case 'Q': case 'P': case 'R': |
| 423 | case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': |
| 424 | case 'Y': case 'Z': |
| 425 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
| 426 | case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': |
| 427 | case 'm': case 'n': case 'o': case 'q': case 'p': case 'r': |
| 428 | case 's': case 't': case 'u': case 'v': case 'w': case 'x': |
| 429 | case 'y': case 'z': |
| 430 | case '_': case '.': case '$': |
| 431 | case '0': case '1': case '2': case '3': case '4': |
| 432 | case '5': case '6': case '7': case '8': case '9': |
| 433 | return c + 1; |
| 434 | |
| 435 | // TODO(csilvers): why not allow ~ in names for version-scripts? |
| 436 | case '/': case '\\': case '~': |
| 437 | case '=': case '+': |
| 438 | case ',': |
| 439 | if (this->mode_ == LINKER_SCRIPT) |
| 440 | return c + 1; |
| 441 | return NULL; |
| 442 | |
| 443 | case '[': case ']': case '*': case '?': case '-': |
| 444 | if (this->mode_ == LINKER_SCRIPT || this->mode_ == VERSION_SCRIPT |
| 445 | || this->mode_ == DYNAMIC_LIST) |
| 446 | return c + 1; |
| 447 | return NULL; |
| 448 | |
| 449 | // TODO(csilvers): why allow this? ^ is meaningless in version scripts. |
| 450 | case '^': |
| 451 | if (this->mode_ == VERSION_SCRIPT || this->mode_ == DYNAMIC_LIST) |
| 452 | return c + 1; |
| 453 | return NULL; |
| 454 | |
| 455 | case ':': |
| 456 | if (this->mode_ == LINKER_SCRIPT) |
| 457 | return c + 1; |
| 458 | else if ((this->mode_ == VERSION_SCRIPT || this->mode_ == DYNAMIC_LIST) |
| 459 | && (c[1] == ':')) |
| 460 | { |
| 461 | // A name can have '::' in it, as that's a c++ namespace |
| 462 | // separator. But a single colon is not part of a name. |
| 463 | return c + 2; |
| 464 | } |
| 465 | return NULL; |
| 466 | |
| 467 | default: |
| 468 | return NULL; |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | // For a number we accept 0x followed by hex digits, or any sequence |
| 473 | // of digits. The old linker accepts leading '$' for hex, and |
| 474 | // trailing HXBOD. Those are for MRI compatibility and we don't |
| 475 | // accept them. The old linker also accepts trailing MK for mega or |
| 476 | // kilo. FIXME: Those are mentioned in the documentation, and we |
| 477 | // should accept them. |
| 478 | |
| 479 | // Return whether C1 C2 C3 can start a hex number. |
| 480 | |
| 481 | inline bool |
| 482 | Lex::can_start_hex(char c1, char c2, char c3) |
| 483 | { |
| 484 | if (c1 == '0' && (c2 == 'x' || c2 == 'X')) |
| 485 | return this->can_continue_hex(&c3); |
| 486 | return false; |
| 487 | } |
| 488 | |
| 489 | // Return whether C can appear in a hex number. |
| 490 | |
| 491 | inline const char* |
| 492 | Lex::can_continue_hex(const char* c) |
| 493 | { |
| 494 | switch (*c) |
| 495 | { |
| 496 | case '0': case '1': case '2': case '3': case '4': |
| 497 | case '5': case '6': case '7': case '8': case '9': |
| 498 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': |
| 499 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
| 500 | return c + 1; |
| 501 | |
| 502 | default: |
| 503 | return NULL; |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | // Return whether C can start a non-hex number. |
| 508 | |
| 509 | inline bool |
| 510 | Lex::can_start_number(char c) |
| 511 | { |
| 512 | switch (c) |
| 513 | { |
| 514 | case '0': case '1': case '2': case '3': case '4': |
| 515 | case '5': case '6': case '7': case '8': case '9': |
| 516 | return true; |
| 517 | |
| 518 | default: |
| 519 | return false; |
| 520 | } |
| 521 | } |
| 522 | |
| 523 | // If C1 C2 C3 form a valid three character operator, return the |
| 524 | // opcode (defined in the yyscript.h file generated from yyscript.y). |
| 525 | // Otherwise return 0. |
| 526 | |
| 527 | inline int |
| 528 | Lex::three_char_operator(char c1, char c2, char c3) |
| 529 | { |
| 530 | switch (c1) |
| 531 | { |
| 532 | case '<': |
| 533 | if (c2 == '<' && c3 == '=') |
| 534 | return LSHIFTEQ; |
| 535 | break; |
| 536 | case '>': |
| 537 | if (c2 == '>' && c3 == '=') |
| 538 | return RSHIFTEQ; |
| 539 | break; |
| 540 | default: |
| 541 | break; |
| 542 | } |
| 543 | return 0; |
| 544 | } |
| 545 | |
| 546 | // If C1 C2 form a valid two character operator, return the opcode |
| 547 | // (defined in the yyscript.h file generated from yyscript.y). |
| 548 | // Otherwise return 0. |
| 549 | |
| 550 | inline int |
| 551 | Lex::two_char_operator(char c1, char c2) |
| 552 | { |
| 553 | switch (c1) |
| 554 | { |
| 555 | case '=': |
| 556 | if (c2 == '=') |
| 557 | return EQ; |
| 558 | break; |
| 559 | case '!': |
| 560 | if (c2 == '=') |
| 561 | return NE; |
| 562 | break; |
| 563 | case '+': |
| 564 | if (c2 == '=') |
| 565 | return PLUSEQ; |
| 566 | break; |
| 567 | case '-': |
| 568 | if (c2 == '=') |
| 569 | return MINUSEQ; |
| 570 | break; |
| 571 | case '*': |
| 572 | if (c2 == '=') |
| 573 | return MULTEQ; |
| 574 | break; |
| 575 | case '/': |
| 576 | if (c2 == '=') |
| 577 | return DIVEQ; |
| 578 | break; |
| 579 | case '|': |
| 580 | if (c2 == '=') |
| 581 | return OREQ; |
| 582 | if (c2 == '|') |
| 583 | return OROR; |
| 584 | break; |
| 585 | case '&': |
| 586 | if (c2 == '=') |
| 587 | return ANDEQ; |
| 588 | if (c2 == '&') |
| 589 | return ANDAND; |
| 590 | break; |
| 591 | case '>': |
| 592 | if (c2 == '=') |
| 593 | return GE; |
| 594 | if (c2 == '>') |
| 595 | return RSHIFT; |
| 596 | break; |
| 597 | case '<': |
| 598 | if (c2 == '=') |
| 599 | return LE; |
| 600 | if (c2 == '<') |
| 601 | return LSHIFT; |
| 602 | break; |
| 603 | default: |
| 604 | break; |
| 605 | } |
| 606 | return 0; |
| 607 | } |
| 608 | |
| 609 | // If C1 is a valid operator, return the opcode. Otherwise return 0. |
| 610 | |
| 611 | inline int |
| 612 | Lex::one_char_operator(char c1) |
| 613 | { |
| 614 | switch (c1) |
| 615 | { |
| 616 | case '+': |
| 617 | case '-': |
| 618 | case '*': |
| 619 | case '/': |
| 620 | case '%': |
| 621 | case '!': |
| 622 | case '&': |
| 623 | case '|': |
| 624 | case '^': |
| 625 | case '~': |
| 626 | case '<': |
| 627 | case '>': |
| 628 | case '=': |
| 629 | case '?': |
| 630 | case ',': |
| 631 | case '(': |
| 632 | case ')': |
| 633 | case '{': |
| 634 | case '}': |
| 635 | case '[': |
| 636 | case ']': |
| 637 | case ':': |
| 638 | case ';': |
| 639 | return c1; |
| 640 | default: |
| 641 | return 0; |
| 642 | } |
| 643 | } |
| 644 | |
| 645 | // Skip a C style comment. *PP points to just after the "/*". Return |
| 646 | // false if the comment did not end. |
| 647 | |
| 648 | bool |
| 649 | Lex::skip_c_comment(const char** pp) |
| 650 | { |
| 651 | const char* p = *pp; |
| 652 | while (p[0] != '*' || p[1] != '/') |
| 653 | { |
| 654 | if (*p == '\0') |
| 655 | { |
| 656 | *pp = p; |
| 657 | return false; |
| 658 | } |
| 659 | |
| 660 | if (*p == '\n') |
| 661 | { |
| 662 | ++this->lineno_; |
| 663 | this->linestart_ = p + 1; |
| 664 | } |
| 665 | ++p; |
| 666 | } |
| 667 | |
| 668 | *pp = p + 2; |
| 669 | return true; |
| 670 | } |
| 671 | |
| 672 | // Skip a line # comment. Return false if there was no newline. |
| 673 | |
| 674 | bool |
| 675 | Lex::skip_line_comment(const char** pp) |
| 676 | { |
| 677 | const char* p = *pp; |
| 678 | size_t skip = strcspn(p, "\n"); |
| 679 | if (p[skip] == '\0') |
| 680 | { |
| 681 | *pp = p + skip; |
| 682 | return false; |
| 683 | } |
| 684 | |
| 685 | p += skip + 1; |
| 686 | ++this->lineno_; |
| 687 | this->linestart_ = p; |
| 688 | *pp = p; |
| 689 | |
| 690 | return true; |
| 691 | } |
| 692 | |
| 693 | // Build a token CLASSIFICATION from all characters that match |
| 694 | // CAN_CONTINUE_FN. Update *PP. |
| 695 | |
| 696 | inline Token |
| 697 | Lex::gather_token(Token::Classification classification, |
| 698 | const char* (Lex::*can_continue_fn)(const char*), |
| 699 | const char* start, |
| 700 | const char* match, |
| 701 | const char **pp) |
| 702 | { |
| 703 | const char* new_match = NULL; |
| 704 | while ((new_match = (this->*can_continue_fn)(match))) |
| 705 | match = new_match; |
| 706 | *pp = match; |
| 707 | return this->make_token(classification, start, match - start, start); |
| 708 | } |
| 709 | |
| 710 | // Build a token from a quoted string. |
| 711 | |
| 712 | Token |
| 713 | Lex::gather_quoted_string(const char** pp) |
| 714 | { |
| 715 | const char* start = *pp; |
| 716 | const char* p = start; |
| 717 | ++p; |
| 718 | size_t skip = strcspn(p, "\"\n"); |
| 719 | if (p[skip] != '"') |
| 720 | return this->make_invalid_token(start); |
| 721 | *pp = p + skip + 1; |
| 722 | return this->make_token(Token::TOKEN_QUOTED_STRING, p, skip, start); |
| 723 | } |
| 724 | |
| 725 | // Return the next token at *PP. Update *PP. General guideline: we |
| 726 | // require linker scripts to be simple ASCII. No unicode linker |
| 727 | // scripts. In particular we can assume that any '\0' is the end of |
| 728 | // the input. |
| 729 | |
| 730 | Token |
| 731 | Lex::get_token(const char** pp) |
| 732 | { |
| 733 | const char* p = *pp; |
| 734 | |
| 735 | while (true) |
| 736 | { |
| 737 | if (*p == '\0') |
| 738 | { |
| 739 | *pp = p; |
| 740 | return this->make_eof_token(p); |
| 741 | } |
| 742 | |
| 743 | // Skip whitespace quickly. |
| 744 | while (*p == ' ' || *p == '\t') |
| 745 | ++p; |
| 746 | |
| 747 | if (*p == '\n') |
| 748 | { |
| 749 | ++p; |
| 750 | ++this->lineno_; |
| 751 | this->linestart_ = p; |
| 752 | continue; |
| 753 | } |
| 754 | |
| 755 | // Skip C style comments. |
| 756 | if (p[0] == '/' && p[1] == '*') |
| 757 | { |
| 758 | int lineno = this->lineno_; |
| 759 | int charpos = p - this->linestart_ + 1; |
| 760 | |
| 761 | *pp = p + 2; |
| 762 | if (!this->skip_c_comment(pp)) |
| 763 | return Token(Token::TOKEN_INVALID, lineno, charpos); |
| 764 | p = *pp; |
| 765 | |
| 766 | continue; |
| 767 | } |
| 768 | |
| 769 | // Skip line comments. |
| 770 | if (*p == '#') |
| 771 | { |
| 772 | *pp = p + 1; |
| 773 | if (!this->skip_line_comment(pp)) |
| 774 | return this->make_eof_token(p); |
| 775 | p = *pp; |
| 776 | continue; |
| 777 | } |
| 778 | |
| 779 | // Check for a name. |
| 780 | if (this->can_start_name(p[0], p[1])) |
| 781 | return this->gather_token(Token::TOKEN_STRING, |
| 782 | &Lex::can_continue_name, |
| 783 | p, p + 1, pp); |
| 784 | |
| 785 | // We accept any arbitrary name in double quotes, as long as it |
| 786 | // does not cross a line boundary. |
| 787 | if (*p == '"') |
| 788 | { |
| 789 | *pp = p; |
| 790 | return this->gather_quoted_string(pp); |
| 791 | } |
| 792 | |
| 793 | // Check for a number. |
| 794 | |
| 795 | if (this->can_start_hex(p[0], p[1], p[2])) |
| 796 | return this->gather_token(Token::TOKEN_INTEGER, |
| 797 | &Lex::can_continue_hex, |
| 798 | p, p + 3, pp); |
| 799 | |
| 800 | if (Lex::can_start_number(p[0])) |
| 801 | return this->gather_token(Token::TOKEN_INTEGER, |
| 802 | &Lex::can_continue_number, |
| 803 | p, p + 1, pp); |
| 804 | |
| 805 | // Check for operators. |
| 806 | |
| 807 | int opcode = Lex::three_char_operator(p[0], p[1], p[2]); |
| 808 | if (opcode != 0) |
| 809 | { |
| 810 | *pp = p + 3; |
| 811 | return this->make_token(opcode, p); |
| 812 | } |
| 813 | |
| 814 | opcode = Lex::two_char_operator(p[0], p[1]); |
| 815 | if (opcode != 0) |
| 816 | { |
| 817 | *pp = p + 2; |
| 818 | return this->make_token(opcode, p); |
| 819 | } |
| 820 | |
| 821 | opcode = Lex::one_char_operator(p[0]); |
| 822 | if (opcode != 0) |
| 823 | { |
| 824 | *pp = p + 1; |
| 825 | return this->make_token(opcode, p); |
| 826 | } |
| 827 | |
| 828 | return this->make_token(Token::TOKEN_INVALID, p); |
| 829 | } |
| 830 | } |
| 831 | |
| 832 | // Return the next token. |
| 833 | |
| 834 | const Token* |
| 835 | Lex::next_token() |
| 836 | { |
| 837 | // The first token is special. |
| 838 | if (this->first_token_ != 0) |
| 839 | { |
| 840 | this->token_ = Token(this->first_token_, 0, 0); |
| 841 | this->first_token_ = 0; |
| 842 | return &this->token_; |
| 843 | } |
| 844 | |
| 845 | this->token_ = this->get_token(&this->current_); |
| 846 | |
| 847 | // Don't let an early null byte fool us into thinking that we've |
| 848 | // reached the end of the file. |
| 849 | if (this->token_.is_eof() |
| 850 | && (static_cast<size_t>(this->current_ - this->input_string_) |
| 851 | < this->input_length_)) |
| 852 | this->token_ = this->make_invalid_token(this->current_); |
| 853 | |
| 854 | return &this->token_; |
| 855 | } |
| 856 | |
| 857 | // class Symbol_assignment. |
| 858 | |
| 859 | // Add the symbol to the symbol table. This makes sure the symbol is |
| 860 | // there and defined. The actual value is stored later. We can't |
| 861 | // determine the actual value at this point, because we can't |
| 862 | // necessarily evaluate the expression until all ordinary symbols have |
| 863 | // been finalized. |
| 864 | |
| 865 | // The GNU linker lets symbol assignments in the linker script |
| 866 | // silently override defined symbols in object files. We are |
| 867 | // compatible. FIXME: Should we issue a warning? |
| 868 | |
| 869 | void |
| 870 | Symbol_assignment::add_to_table(Symbol_table* symtab) |
| 871 | { |
| 872 | elfcpp::STV vis = this->hidden_ ? elfcpp::STV_HIDDEN : elfcpp::STV_DEFAULT; |
| 873 | this->sym_ = symtab->define_as_constant(this->name_.c_str(), |
| 874 | NULL, // version |
| 875 | 0, // value |
| 876 | 0, // size |
| 877 | elfcpp::STT_NOTYPE, |
| 878 | elfcpp::STB_GLOBAL, |
| 879 | vis, |
| 880 | 0, // nonvis |
| 881 | this->provide_, |
| 882 | true); // force_override |
| 883 | } |
| 884 | |
| 885 | // Finalize a symbol value. |
| 886 | |
| 887 | void |
| 888 | Symbol_assignment::finalize(Symbol_table* symtab, const Layout* layout) |
| 889 | { |
| 890 | this->finalize_maybe_dot(symtab, layout, false, 0, NULL); |
| 891 | } |
| 892 | |
| 893 | // Finalize a symbol value which can refer to the dot symbol. |
| 894 | |
| 895 | void |
| 896 | Symbol_assignment::finalize_with_dot(Symbol_table* symtab, |
| 897 | const Layout* layout, |
| 898 | uint64_t dot_value, |
| 899 | Output_section* dot_section) |
| 900 | { |
| 901 | this->finalize_maybe_dot(symtab, layout, true, dot_value, dot_section); |
| 902 | } |
| 903 | |
| 904 | // Finalize a symbol value, internal version. |
| 905 | |
| 906 | void |
| 907 | Symbol_assignment::finalize_maybe_dot(Symbol_table* symtab, |
| 908 | const Layout* layout, |
| 909 | bool is_dot_available, |
| 910 | uint64_t dot_value, |
| 911 | Output_section* dot_section) |
| 912 | { |
| 913 | // If we were only supposed to provide this symbol, the sym_ field |
| 914 | // will be NULL if the symbol was not referenced. |
| 915 | if (this->sym_ == NULL) |
| 916 | { |
| 917 | gold_assert(this->provide_); |
| 918 | return; |
| 919 | } |
| 920 | |
| 921 | if (parameters->target().get_size() == 32) |
| 922 | { |
| 923 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
| 924 | this->sized_finalize<32>(symtab, layout, is_dot_available, dot_value, |
| 925 | dot_section); |
| 926 | #else |
| 927 | gold_unreachable(); |
| 928 | #endif |
| 929 | } |
| 930 | else if (parameters->target().get_size() == 64) |
| 931 | { |
| 932 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) |
| 933 | this->sized_finalize<64>(symtab, layout, is_dot_available, dot_value, |
| 934 | dot_section); |
| 935 | #else |
| 936 | gold_unreachable(); |
| 937 | #endif |
| 938 | } |
| 939 | else |
| 940 | gold_unreachable(); |
| 941 | } |
| 942 | |
| 943 | template<int size> |
| 944 | void |
| 945 | Symbol_assignment::sized_finalize(Symbol_table* symtab, const Layout* layout, |
| 946 | bool is_dot_available, uint64_t dot_value, |
| 947 | Output_section* dot_section) |
| 948 | { |
| 949 | Output_section* section; |
| 950 | uint64_t final_val = this->val_->eval_maybe_dot(symtab, layout, true, |
| 951 | is_dot_available, |
| 952 | dot_value, dot_section, |
| 953 | §ion); |
| 954 | Sized_symbol<size>* ssym = symtab->get_sized_symbol<size>(this->sym_); |
| 955 | ssym->set_value(final_val); |
| 956 | if (section != NULL) |
| 957 | ssym->set_output_section(section); |
| 958 | } |
| 959 | |
| 960 | // Set the symbol value if the expression yields an absolute value. |
| 961 | |
| 962 | void |
| 963 | Symbol_assignment::set_if_absolute(Symbol_table* symtab, const Layout* layout, |
| 964 | bool is_dot_available, uint64_t dot_value) |
| 965 | { |
| 966 | if (this->sym_ == NULL) |
| 967 | return; |
| 968 | |
| 969 | Output_section* val_section; |
| 970 | uint64_t val = this->val_->eval_maybe_dot(symtab, layout, false, |
| 971 | is_dot_available, dot_value, |
| 972 | NULL, &val_section); |
| 973 | if (val_section != NULL) |
| 974 | return; |
| 975 | |
| 976 | if (parameters->target().get_size() == 32) |
| 977 | { |
| 978 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
| 979 | Sized_symbol<32>* ssym = symtab->get_sized_symbol<32>(this->sym_); |
| 980 | ssym->set_value(val); |
| 981 | #else |
| 982 | gold_unreachable(); |
| 983 | #endif |
| 984 | } |
| 985 | else if (parameters->target().get_size() == 64) |
| 986 | { |
| 987 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) |
| 988 | Sized_symbol<64>* ssym = symtab->get_sized_symbol<64>(this->sym_); |
| 989 | ssym->set_value(val); |
| 990 | #else |
| 991 | gold_unreachable(); |
| 992 | #endif |
| 993 | } |
| 994 | else |
| 995 | gold_unreachable(); |
| 996 | } |
| 997 | |
| 998 | // Print for debugging. |
| 999 | |
| 1000 | void |
| 1001 | Symbol_assignment::print(FILE* f) const |
| 1002 | { |
| 1003 | if (this->provide_ && this->hidden_) |
| 1004 | fprintf(f, "PROVIDE_HIDDEN("); |
| 1005 | else if (this->provide_) |
| 1006 | fprintf(f, "PROVIDE("); |
| 1007 | else if (this->hidden_) |
| 1008 | gold_unreachable(); |
| 1009 | |
| 1010 | fprintf(f, "%s = ", this->name_.c_str()); |
| 1011 | this->val_->print(f); |
| 1012 | |
| 1013 | if (this->provide_ || this->hidden_) |
| 1014 | fprintf(f, ")"); |
| 1015 | |
| 1016 | fprintf(f, "\n"); |
| 1017 | } |
| 1018 | |
| 1019 | // Class Script_assertion. |
| 1020 | |
| 1021 | // Check the assertion. |
| 1022 | |
| 1023 | void |
| 1024 | Script_assertion::check(const Symbol_table* symtab, const Layout* layout) |
| 1025 | { |
| 1026 | if (!this->check_->eval(symtab, layout, true)) |
| 1027 | gold_error("%s", this->message_.c_str()); |
| 1028 | } |
| 1029 | |
| 1030 | // Print for debugging. |
| 1031 | |
| 1032 | void |
| 1033 | Script_assertion::print(FILE* f) const |
| 1034 | { |
| 1035 | fprintf(f, "ASSERT("); |
| 1036 | this->check_->print(f); |
| 1037 | fprintf(f, ", \"%s\")\n", this->message_.c_str()); |
| 1038 | } |
| 1039 | |
| 1040 | // Class Script_options. |
| 1041 | |
| 1042 | Script_options::Script_options() |
| 1043 | : entry_(), symbol_assignments_(), version_script_info_(), |
| 1044 | script_sections_() |
| 1045 | { |
| 1046 | } |
| 1047 | |
| 1048 | // Add a symbol to be defined. |
| 1049 | |
| 1050 | void |
| 1051 | Script_options::add_symbol_assignment(const char* name, size_t length, |
| 1052 | Expression* value, bool provide, |
| 1053 | bool hidden) |
| 1054 | { |
| 1055 | if (length != 1 || name[0] != '.') |
| 1056 | { |
| 1057 | if (this->script_sections_.in_sections_clause()) |
| 1058 | this->script_sections_.add_symbol_assignment(name, length, value, |
| 1059 | provide, hidden); |
| 1060 | else |
| 1061 | { |
| 1062 | Symbol_assignment* p = new Symbol_assignment(name, length, value, |
| 1063 | provide, hidden); |
| 1064 | this->symbol_assignments_.push_back(p); |
| 1065 | } |
| 1066 | } |
| 1067 | else |
| 1068 | { |
| 1069 | if (provide || hidden) |
| 1070 | gold_error(_("invalid use of PROVIDE for dot symbol")); |
| 1071 | if (!this->script_sections_.in_sections_clause()) |
| 1072 | gold_error(_("invalid assignment to dot outside of SECTIONS")); |
| 1073 | else |
| 1074 | this->script_sections_.add_dot_assignment(value); |
| 1075 | } |
| 1076 | } |
| 1077 | |
| 1078 | // Add an assertion. |
| 1079 | |
| 1080 | void |
| 1081 | Script_options::add_assertion(Expression* check, const char* message, |
| 1082 | size_t messagelen) |
| 1083 | { |
| 1084 | if (this->script_sections_.in_sections_clause()) |
| 1085 | this->script_sections_.add_assertion(check, message, messagelen); |
| 1086 | else |
| 1087 | { |
| 1088 | Script_assertion* p = new Script_assertion(check, message, messagelen); |
| 1089 | this->assertions_.push_back(p); |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | // Create sections required by any linker scripts. |
| 1094 | |
| 1095 | void |
| 1096 | Script_options::create_script_sections(Layout* layout) |
| 1097 | { |
| 1098 | if (this->saw_sections_clause()) |
| 1099 | this->script_sections_.create_sections(layout); |
| 1100 | } |
| 1101 | |
| 1102 | // Add any symbols we are defining to the symbol table. |
| 1103 | |
| 1104 | void |
| 1105 | Script_options::add_symbols_to_table(Symbol_table* symtab) |
| 1106 | { |
| 1107 | for (Symbol_assignments::iterator p = this->symbol_assignments_.begin(); |
| 1108 | p != this->symbol_assignments_.end(); |
| 1109 | ++p) |
| 1110 | (*p)->add_to_table(symtab); |
| 1111 | this->script_sections_.add_symbols_to_table(symtab); |
| 1112 | } |
| 1113 | |
| 1114 | // Finalize symbol values. Also check assertions. |
| 1115 | |
| 1116 | void |
| 1117 | Script_options::finalize_symbols(Symbol_table* symtab, const Layout* layout) |
| 1118 | { |
| 1119 | // We finalize the symbols defined in SECTIONS first, because they |
| 1120 | // are the ones which may have changed. This way if symbol outside |
| 1121 | // SECTIONS are defined in terms of symbols inside SECTIONS, they |
| 1122 | // will get the right value. |
| 1123 | this->script_sections_.finalize_symbols(symtab, layout); |
| 1124 | |
| 1125 | for (Symbol_assignments::iterator p = this->symbol_assignments_.begin(); |
| 1126 | p != this->symbol_assignments_.end(); |
| 1127 | ++p) |
| 1128 | (*p)->finalize(symtab, layout); |
| 1129 | |
| 1130 | for (Assertions::iterator p = this->assertions_.begin(); |
| 1131 | p != this->assertions_.end(); |
| 1132 | ++p) |
| 1133 | (*p)->check(symtab, layout); |
| 1134 | } |
| 1135 | |
| 1136 | // Set section addresses. We set all the symbols which have absolute |
| 1137 | // values. Then we let the SECTIONS clause do its thing. This |
| 1138 | // returns the segment which holds the file header and segment |
| 1139 | // headers, if any. |
| 1140 | |
| 1141 | Output_segment* |
| 1142 | Script_options::set_section_addresses(Symbol_table* symtab, Layout* layout) |
| 1143 | { |
| 1144 | for (Symbol_assignments::iterator p = this->symbol_assignments_.begin(); |
| 1145 | p != this->symbol_assignments_.end(); |
| 1146 | ++p) |
| 1147 | (*p)->set_if_absolute(symtab, layout, false, 0); |
| 1148 | |
| 1149 | return this->script_sections_.set_section_addresses(symtab, layout); |
| 1150 | } |
| 1151 | |
| 1152 | // This class holds data passed through the parser to the lexer and to |
| 1153 | // the parser support functions. This avoids global variables. We |
| 1154 | // can't use global variables because we need not be called by a |
| 1155 | // singleton thread. |
| 1156 | |
| 1157 | class Parser_closure |
| 1158 | { |
| 1159 | public: |
| 1160 | Parser_closure(const char* filename, |
| 1161 | const Position_dependent_options& posdep_options, |
| 1162 | bool in_group, bool is_in_sysroot, |
| 1163 | Command_line* command_line, |
| 1164 | Script_options* script_options, |
| 1165 | Lex* lex) |
| 1166 | : filename_(filename), posdep_options_(posdep_options), |
| 1167 | in_group_(in_group), is_in_sysroot_(is_in_sysroot), |
| 1168 | command_line_(command_line), script_options_(script_options), |
| 1169 | version_script_info_(script_options->version_script_info()), |
| 1170 | lex_(lex), lineno_(0), charpos_(0), lex_mode_stack_(), inputs_(NULL) |
| 1171 | { |
| 1172 | // We start out processing C symbols in the default lex mode. |
| 1173 | language_stack_.push_back(""); |
| 1174 | lex_mode_stack_.push_back(lex->mode()); |
| 1175 | } |
| 1176 | |
| 1177 | // Return the file name. |
| 1178 | const char* |
| 1179 | filename() const |
| 1180 | { return this->filename_; } |
| 1181 | |
| 1182 | // Return the position dependent options. The caller may modify |
| 1183 | // this. |
| 1184 | Position_dependent_options& |
| 1185 | position_dependent_options() |
| 1186 | { return this->posdep_options_; } |
| 1187 | |
| 1188 | // Return whether this script is being run in a group. |
| 1189 | bool |
| 1190 | in_group() const |
| 1191 | { return this->in_group_; } |
| 1192 | |
| 1193 | // Return whether this script was found using a directory in the |
| 1194 | // sysroot. |
| 1195 | bool |
| 1196 | is_in_sysroot() const |
| 1197 | { return this->is_in_sysroot_; } |
| 1198 | |
| 1199 | // Returns the Command_line structure passed in at constructor time. |
| 1200 | // This value may be NULL. The caller may modify this, which modifies |
| 1201 | // the passed-in Command_line object (not a copy). |
| 1202 | Command_line* |
| 1203 | command_line() |
| 1204 | { return this->command_line_; } |
| 1205 | |
| 1206 | // Return the options which may be set by a script. |
| 1207 | Script_options* |
| 1208 | script_options() |
| 1209 | { return this->script_options_; } |
| 1210 | |
| 1211 | // Return the object in which version script information should be stored. |
| 1212 | Version_script_info* |
| 1213 | version_script() |
| 1214 | { return this->version_script_info_; } |
| 1215 | |
| 1216 | // Return the next token, and advance. |
| 1217 | const Token* |
| 1218 | next_token() |
| 1219 | { |
| 1220 | const Token* token = this->lex_->next_token(); |
| 1221 | this->lineno_ = token->lineno(); |
| 1222 | this->charpos_ = token->charpos(); |
| 1223 | return token; |
| 1224 | } |
| 1225 | |
| 1226 | // Set a new lexer mode, pushing the current one. |
| 1227 | void |
| 1228 | push_lex_mode(Lex::Mode mode) |
| 1229 | { |
| 1230 | this->lex_mode_stack_.push_back(this->lex_->mode()); |
| 1231 | this->lex_->set_mode(mode); |
| 1232 | } |
| 1233 | |
| 1234 | // Pop the lexer mode. |
| 1235 | void |
| 1236 | pop_lex_mode() |
| 1237 | { |
| 1238 | gold_assert(!this->lex_mode_stack_.empty()); |
| 1239 | this->lex_->set_mode(this->lex_mode_stack_.back()); |
| 1240 | this->lex_mode_stack_.pop_back(); |
| 1241 | } |
| 1242 | |
| 1243 | // Return the current lexer mode. |
| 1244 | Lex::Mode |
| 1245 | lex_mode() const |
| 1246 | { return this->lex_mode_stack_.back(); } |
| 1247 | |
| 1248 | // Return the line number of the last token. |
| 1249 | int |
| 1250 | lineno() const |
| 1251 | { return this->lineno_; } |
| 1252 | |
| 1253 | // Return the character position in the line of the last token. |
| 1254 | int |
| 1255 | charpos() const |
| 1256 | { return this->charpos_; } |
| 1257 | |
| 1258 | // Return the list of input files, creating it if necessary. This |
| 1259 | // is a space leak--we never free the INPUTS_ pointer. |
| 1260 | Input_arguments* |
| 1261 | inputs() |
| 1262 | { |
| 1263 | if (this->inputs_ == NULL) |
| 1264 | this->inputs_ = new Input_arguments(); |
| 1265 | return this->inputs_; |
| 1266 | } |
| 1267 | |
| 1268 | // Return whether we saw any input files. |
| 1269 | bool |
| 1270 | saw_inputs() const |
| 1271 | { return this->inputs_ != NULL && !this->inputs_->empty(); } |
| 1272 | |
| 1273 | // Return the current language being processed in a version script |
| 1274 | // (eg, "C++"). The empty string represents unmangled C names. |
| 1275 | const std::string& |
| 1276 | get_current_language() const |
| 1277 | { return this->language_stack_.back(); } |
| 1278 | |
| 1279 | // Push a language onto the stack when entering an extern block. |
| 1280 | void push_language(const std::string& lang) |
| 1281 | { this->language_stack_.push_back(lang); } |
| 1282 | |
| 1283 | // Pop a language off of the stack when exiting an extern block. |
| 1284 | void pop_language() |
| 1285 | { |
| 1286 | gold_assert(!this->language_stack_.empty()); |
| 1287 | this->language_stack_.pop_back(); |
| 1288 | } |
| 1289 | |
| 1290 | private: |
| 1291 | // The name of the file we are reading. |
| 1292 | const char* filename_; |
| 1293 | // The position dependent options. |
| 1294 | Position_dependent_options posdep_options_; |
| 1295 | // Whether we are currently in a --start-group/--end-group. |
| 1296 | bool in_group_; |
| 1297 | // Whether the script was found in a sysrooted directory. |
| 1298 | bool is_in_sysroot_; |
| 1299 | // May be NULL if the user chooses not to pass one in. |
| 1300 | Command_line* command_line_; |
| 1301 | // Options which may be set from any linker script. |
| 1302 | Script_options* script_options_; |
| 1303 | // Information parsed from a version script. |
| 1304 | Version_script_info* version_script_info_; |
| 1305 | // The lexer. |
| 1306 | Lex* lex_; |
| 1307 | // The line number of the last token returned by next_token. |
| 1308 | int lineno_; |
| 1309 | // The column number of the last token returned by next_token. |
| 1310 | int charpos_; |
| 1311 | // A stack of lexer modes. |
| 1312 | std::vector<Lex::Mode> lex_mode_stack_; |
| 1313 | // A stack of which extern/language block we're inside. Can be C++, |
| 1314 | // java, or empty for C. |
| 1315 | std::vector<std::string> language_stack_; |
| 1316 | // New input files found to add to the link. |
| 1317 | Input_arguments* inputs_; |
| 1318 | }; |
| 1319 | |
| 1320 | // FILE was found as an argument on the command line. Try to read it |
| 1321 | // as a script. Return true if the file was handled. |
| 1322 | |
| 1323 | bool |
| 1324 | read_input_script(Workqueue* workqueue, const General_options& options, |
| 1325 | Symbol_table* symtab, Layout* layout, |
| 1326 | Dirsearch* dirsearch, Input_objects* input_objects, |
| 1327 | Mapfile* mapfile, Input_group* input_group, |
| 1328 | const Input_argument* input_argument, |
| 1329 | Input_file* input_file, Task_token* next_blocker, |
| 1330 | bool* used_next_blocker) |
| 1331 | { |
| 1332 | *used_next_blocker = false; |
| 1333 | |
| 1334 | std::string input_string; |
| 1335 | Lex::read_file(input_file, &input_string); |
| 1336 | |
| 1337 | Lex lex(input_string.c_str(), input_string.length(), PARSING_LINKER_SCRIPT); |
| 1338 | |
| 1339 | Parser_closure closure(input_file->filename().c_str(), |
| 1340 | input_argument->file().options(), |
| 1341 | input_group != NULL, |
| 1342 | input_file->is_in_sysroot(), |
| 1343 | NULL, |
| 1344 | layout->script_options(), |
| 1345 | &lex); |
| 1346 | |
| 1347 | if (yyparse(&closure) != 0) |
| 1348 | return false; |
| 1349 | |
| 1350 | if (!closure.saw_inputs()) |
| 1351 | return true; |
| 1352 | |
| 1353 | Task_token* this_blocker = NULL; |
| 1354 | for (Input_arguments::const_iterator p = closure.inputs()->begin(); |
| 1355 | p != closure.inputs()->end(); |
| 1356 | ++p) |
| 1357 | { |
| 1358 | Task_token* nb; |
| 1359 | if (p + 1 == closure.inputs()->end()) |
| 1360 | nb = next_blocker; |
| 1361 | else |
| 1362 | { |
| 1363 | nb = new Task_token(true); |
| 1364 | nb->add_blocker(); |
| 1365 | } |
| 1366 | workqueue->queue_soon(new Read_symbols(options, input_objects, symtab, |
| 1367 | layout, dirsearch, mapfile, &*p, |
| 1368 | input_group, this_blocker, nb)); |
| 1369 | this_blocker = nb; |
| 1370 | } |
| 1371 | |
| 1372 | *used_next_blocker = true; |
| 1373 | |
| 1374 | return true; |
| 1375 | } |
| 1376 | |
| 1377 | // Helper function for read_version_script() and |
| 1378 | // read_commandline_script(). Processes the given file in the mode |
| 1379 | // indicated by first_token and lex_mode. |
| 1380 | |
| 1381 | static bool |
| 1382 | read_script_file(const char* filename, Command_line* cmdline, |
| 1383 | Script_options* script_options, |
| 1384 | int first_token, Lex::Mode lex_mode) |
| 1385 | { |
| 1386 | // TODO: if filename is a relative filename, search for it manually |
| 1387 | // using "." + cmdline->options()->search_path() -- not dirsearch. |
| 1388 | Dirsearch dirsearch; |
| 1389 | |
| 1390 | // The file locking code wants to record a Task, but we haven't |
| 1391 | // started the workqueue yet. This is only for debugging purposes, |
| 1392 | // so we invent a fake value. |
| 1393 | const Task* task = reinterpret_cast<const Task*>(-1); |
| 1394 | |
| 1395 | // We don't want this file to be opened in binary mode. |
| 1396 | Position_dependent_options posdep = cmdline->position_dependent_options(); |
| 1397 | if (posdep.format_enum() == General_options::OBJECT_FORMAT_BINARY) |
| 1398 | posdep.set_format_enum(General_options::OBJECT_FORMAT_ELF); |
| 1399 | Input_file_argument input_argument(filename, false, "", false, posdep); |
| 1400 | Input_file input_file(&input_argument); |
| 1401 | if (!input_file.open(cmdline->options(), dirsearch, task)) |
| 1402 | return false; |
| 1403 | |
| 1404 | std::string input_string; |
| 1405 | Lex::read_file(&input_file, &input_string); |
| 1406 | |
| 1407 | Lex lex(input_string.c_str(), input_string.length(), first_token); |
| 1408 | lex.set_mode(lex_mode); |
| 1409 | |
| 1410 | Parser_closure closure(filename, |
| 1411 | cmdline->position_dependent_options(), |
| 1412 | false, |
| 1413 | input_file.is_in_sysroot(), |
| 1414 | cmdline, |
| 1415 | script_options, |
| 1416 | &lex); |
| 1417 | if (yyparse(&closure) != 0) |
| 1418 | { |
| 1419 | input_file.file().unlock(task); |
| 1420 | return false; |
| 1421 | } |
| 1422 | |
| 1423 | input_file.file().unlock(task); |
| 1424 | |
| 1425 | gold_assert(!closure.saw_inputs()); |
| 1426 | |
| 1427 | return true; |
| 1428 | } |
| 1429 | |
| 1430 | // FILENAME was found as an argument to --script (-T). |
| 1431 | // Read it as a script, and execute its contents immediately. |
| 1432 | |
| 1433 | bool |
| 1434 | read_commandline_script(const char* filename, Command_line* cmdline) |
| 1435 | { |
| 1436 | return read_script_file(filename, cmdline, &cmdline->script_options(), |
| 1437 | PARSING_LINKER_SCRIPT, Lex::LINKER_SCRIPT); |
| 1438 | } |
| 1439 | |
| 1440 | // FILENAME was found as an argument to --version-script. Read it as |
| 1441 | // a version script, and store its contents in |
| 1442 | // cmdline->script_options()->version_script_info(). |
| 1443 | |
| 1444 | bool |
| 1445 | read_version_script(const char* filename, Command_line* cmdline) |
| 1446 | { |
| 1447 | return read_script_file(filename, cmdline, &cmdline->script_options(), |
| 1448 | PARSING_VERSION_SCRIPT, Lex::VERSION_SCRIPT); |
| 1449 | } |
| 1450 | |
| 1451 | // FILENAME was found as an argument to --dynamic-list. Read it as a |
| 1452 | // list of symbols, and store its contents in DYNAMIC_LIST. |
| 1453 | |
| 1454 | bool |
| 1455 | read_dynamic_list(const char* filename, Command_line* cmdline, |
| 1456 | Script_options* dynamic_list) |
| 1457 | { |
| 1458 | return read_script_file(filename, cmdline, dynamic_list, |
| 1459 | PARSING_DYNAMIC_LIST, Lex::DYNAMIC_LIST); |
| 1460 | } |
| 1461 | |
| 1462 | // Implement the --defsym option on the command line. Return true if |
| 1463 | // all is well. |
| 1464 | |
| 1465 | bool |
| 1466 | Script_options::define_symbol(const char* definition) |
| 1467 | { |
| 1468 | Lex lex(definition, strlen(definition), PARSING_DEFSYM); |
| 1469 | lex.set_mode(Lex::EXPRESSION); |
| 1470 | |
| 1471 | // Dummy value. |
| 1472 | Position_dependent_options posdep_options; |
| 1473 | |
| 1474 | Parser_closure closure("command line", posdep_options, false, false, NULL, |
| 1475 | this, &lex); |
| 1476 | |
| 1477 | if (yyparse(&closure) != 0) |
| 1478 | return false; |
| 1479 | |
| 1480 | gold_assert(!closure.saw_inputs()); |
| 1481 | |
| 1482 | return true; |
| 1483 | } |
| 1484 | |
| 1485 | // Print the script to F for debugging. |
| 1486 | |
| 1487 | void |
| 1488 | Script_options::print(FILE* f) const |
| 1489 | { |
| 1490 | fprintf(f, "%s: Dumping linker script\n", program_name); |
| 1491 | |
| 1492 | if (!this->entry_.empty()) |
| 1493 | fprintf(f, "ENTRY(%s)\n", this->entry_.c_str()); |
| 1494 | |
| 1495 | for (Symbol_assignments::const_iterator p = |
| 1496 | this->symbol_assignments_.begin(); |
| 1497 | p != this->symbol_assignments_.end(); |
| 1498 | ++p) |
| 1499 | (*p)->print(f); |
| 1500 | |
| 1501 | for (Assertions::const_iterator p = this->assertions_.begin(); |
| 1502 | p != this->assertions_.end(); |
| 1503 | ++p) |
| 1504 | (*p)->print(f); |
| 1505 | |
| 1506 | this->script_sections_.print(f); |
| 1507 | |
| 1508 | this->version_script_info_.print(f); |
| 1509 | } |
| 1510 | |
| 1511 | // Manage mapping from keywords to the codes expected by the bison |
| 1512 | // parser. We construct one global object for each lex mode with |
| 1513 | // keywords. |
| 1514 | |
| 1515 | class Keyword_to_parsecode |
| 1516 | { |
| 1517 | public: |
| 1518 | // The structure which maps keywords to parsecodes. |
| 1519 | struct Keyword_parsecode |
| 1520 | { |
| 1521 | // Keyword. |
| 1522 | const char* keyword; |
| 1523 | // Corresponding parsecode. |
| 1524 | int parsecode; |
| 1525 | }; |
| 1526 | |
| 1527 | Keyword_to_parsecode(const Keyword_parsecode* keywords, |
| 1528 | int keyword_count) |
| 1529 | : keyword_parsecodes_(keywords), keyword_count_(keyword_count) |
| 1530 | { } |
| 1531 | |
| 1532 | // Return the parsecode corresponding KEYWORD, or 0 if it is not a |
| 1533 | // keyword. |
| 1534 | int |
| 1535 | keyword_to_parsecode(const char* keyword, size_t len) const; |
| 1536 | |
| 1537 | private: |
| 1538 | const Keyword_parsecode* keyword_parsecodes_; |
| 1539 | const int keyword_count_; |
| 1540 | }; |
| 1541 | |
| 1542 | // Mapping from keyword string to keyword parsecode. This array must |
| 1543 | // be kept in sorted order. Parsecodes are looked up using bsearch. |
| 1544 | // This array must correspond to the list of parsecodes in yyscript.y. |
| 1545 | |
| 1546 | static const Keyword_to_parsecode::Keyword_parsecode |
| 1547 | script_keyword_parsecodes[] = |
| 1548 | { |
| 1549 | { "ABSOLUTE", ABSOLUTE }, |
| 1550 | { "ADDR", ADDR }, |
| 1551 | { "ALIGN", ALIGN_K }, |
| 1552 | { "ALIGNOF", ALIGNOF }, |
| 1553 | { "ASSERT", ASSERT_K }, |
| 1554 | { "AS_NEEDED", AS_NEEDED }, |
| 1555 | { "AT", AT }, |
| 1556 | { "BIND", BIND }, |
| 1557 | { "BLOCK", BLOCK }, |
| 1558 | { "BYTE", BYTE }, |
| 1559 | { "CONSTANT", CONSTANT }, |
| 1560 | { "CONSTRUCTORS", CONSTRUCTORS }, |
| 1561 | { "CREATE_OBJECT_SYMBOLS", CREATE_OBJECT_SYMBOLS }, |
| 1562 | { "DATA_SEGMENT_ALIGN", DATA_SEGMENT_ALIGN }, |
| 1563 | { "DATA_SEGMENT_END", DATA_SEGMENT_END }, |
| 1564 | { "DATA_SEGMENT_RELRO_END", DATA_SEGMENT_RELRO_END }, |
| 1565 | { "DEFINED", DEFINED }, |
| 1566 | { "ENTRY", ENTRY }, |
| 1567 | { "EXCLUDE_FILE", EXCLUDE_FILE }, |
| 1568 | { "EXTERN", EXTERN }, |
| 1569 | { "FILL", FILL }, |
| 1570 | { "FLOAT", FLOAT }, |
| 1571 | { "FORCE_COMMON_ALLOCATION", FORCE_COMMON_ALLOCATION }, |
| 1572 | { "GROUP", GROUP }, |
| 1573 | { "HLL", HLL }, |
| 1574 | { "INCLUDE", INCLUDE }, |
| 1575 | { "INHIBIT_COMMON_ALLOCATION", INHIBIT_COMMON_ALLOCATION }, |
| 1576 | { "INPUT", INPUT }, |
| 1577 | { "KEEP", KEEP }, |
| 1578 | { "LENGTH", LENGTH }, |
| 1579 | { "LOADADDR", LOADADDR }, |
| 1580 | { "LONG", LONG }, |
| 1581 | { "MAP", MAP }, |
| 1582 | { "MAX", MAX_K }, |
| 1583 | { "MEMORY", MEMORY }, |
| 1584 | { "MIN", MIN_K }, |
| 1585 | { "NEXT", NEXT }, |
| 1586 | { "NOCROSSREFS", NOCROSSREFS }, |
| 1587 | { "NOFLOAT", NOFLOAT }, |
| 1588 | { "ONLY_IF_RO", ONLY_IF_RO }, |
| 1589 | { "ONLY_IF_RW", ONLY_IF_RW }, |
| 1590 | { "OPTION", OPTION }, |
| 1591 | { "ORIGIN", ORIGIN }, |
| 1592 | { "OUTPUT", OUTPUT }, |
| 1593 | { "OUTPUT_ARCH", OUTPUT_ARCH }, |
| 1594 | { "OUTPUT_FORMAT", OUTPUT_FORMAT }, |
| 1595 | { "OVERLAY", OVERLAY }, |
| 1596 | { "PHDRS", PHDRS }, |
| 1597 | { "PROVIDE", PROVIDE }, |
| 1598 | { "PROVIDE_HIDDEN", PROVIDE_HIDDEN }, |
| 1599 | { "QUAD", QUAD }, |
| 1600 | { "SEARCH_DIR", SEARCH_DIR }, |
| 1601 | { "SECTIONS", SECTIONS }, |
| 1602 | { "SEGMENT_START", SEGMENT_START }, |
| 1603 | { "SHORT", SHORT }, |
| 1604 | { "SIZEOF", SIZEOF }, |
| 1605 | { "SIZEOF_HEADERS", SIZEOF_HEADERS }, |
| 1606 | { "SORT", SORT_BY_NAME }, |
| 1607 | { "SORT_BY_ALIGNMENT", SORT_BY_ALIGNMENT }, |
| 1608 | { "SORT_BY_NAME", SORT_BY_NAME }, |
| 1609 | { "SPECIAL", SPECIAL }, |
| 1610 | { "SQUAD", SQUAD }, |
| 1611 | { "STARTUP", STARTUP }, |
| 1612 | { "SUBALIGN", SUBALIGN }, |
| 1613 | { "SYSLIB", SYSLIB }, |
| 1614 | { "TARGET", TARGET_K }, |
| 1615 | { "TRUNCATE", TRUNCATE }, |
| 1616 | { "VERSION", VERSIONK }, |
| 1617 | { "global", GLOBAL }, |
| 1618 | { "l", LENGTH }, |
| 1619 | { "len", LENGTH }, |
| 1620 | { "local", LOCAL }, |
| 1621 | { "o", ORIGIN }, |
| 1622 | { "org", ORIGIN }, |
| 1623 | { "sizeof_headers", SIZEOF_HEADERS }, |
| 1624 | }; |
| 1625 | |
| 1626 | static const Keyword_to_parsecode |
| 1627 | script_keywords(&script_keyword_parsecodes[0], |
| 1628 | (sizeof(script_keyword_parsecodes) |
| 1629 | / sizeof(script_keyword_parsecodes[0]))); |
| 1630 | |
| 1631 | static const Keyword_to_parsecode::Keyword_parsecode |
| 1632 | version_script_keyword_parsecodes[] = |
| 1633 | { |
| 1634 | { "extern", EXTERN }, |
| 1635 | { "global", GLOBAL }, |
| 1636 | { "local", LOCAL }, |
| 1637 | }; |
| 1638 | |
| 1639 | static const Keyword_to_parsecode |
| 1640 | version_script_keywords(&version_script_keyword_parsecodes[0], |
| 1641 | (sizeof(version_script_keyword_parsecodes) |
| 1642 | / sizeof(version_script_keyword_parsecodes[0]))); |
| 1643 | |
| 1644 | static const Keyword_to_parsecode::Keyword_parsecode |
| 1645 | dynamic_list_keyword_parsecodes[] = |
| 1646 | { |
| 1647 | { "extern", EXTERN }, |
| 1648 | }; |
| 1649 | |
| 1650 | static const Keyword_to_parsecode |
| 1651 | dynamic_list_keywords(&dynamic_list_keyword_parsecodes[0], |
| 1652 | (sizeof(dynamic_list_keyword_parsecodes) |
| 1653 | / sizeof(dynamic_list_keyword_parsecodes[0]))); |
| 1654 | |
| 1655 | |
| 1656 | |
| 1657 | // Comparison function passed to bsearch. |
| 1658 | |
| 1659 | extern "C" |
| 1660 | { |
| 1661 | |
| 1662 | struct Ktt_key |
| 1663 | { |
| 1664 | const char* str; |
| 1665 | size_t len; |
| 1666 | }; |
| 1667 | |
| 1668 | static int |
| 1669 | ktt_compare(const void* keyv, const void* kttv) |
| 1670 | { |
| 1671 | const Ktt_key* key = static_cast<const Ktt_key*>(keyv); |
| 1672 | const Keyword_to_parsecode::Keyword_parsecode* ktt = |
| 1673 | static_cast<const Keyword_to_parsecode::Keyword_parsecode*>(kttv); |
| 1674 | int i = strncmp(key->str, ktt->keyword, key->len); |
| 1675 | if (i != 0) |
| 1676 | return i; |
| 1677 | if (ktt->keyword[key->len] != '\0') |
| 1678 | return -1; |
| 1679 | return 0; |
| 1680 | } |
| 1681 | |
| 1682 | } // End extern "C". |
| 1683 | |
| 1684 | int |
| 1685 | Keyword_to_parsecode::keyword_to_parsecode(const char* keyword, |
| 1686 | size_t len) const |
| 1687 | { |
| 1688 | Ktt_key key; |
| 1689 | key.str = keyword; |
| 1690 | key.len = len; |
| 1691 | void* kttv = bsearch(&key, |
| 1692 | this->keyword_parsecodes_, |
| 1693 | this->keyword_count_, |
| 1694 | sizeof(this->keyword_parsecodes_[0]), |
| 1695 | ktt_compare); |
| 1696 | if (kttv == NULL) |
| 1697 | return 0; |
| 1698 | Keyword_parsecode* ktt = static_cast<Keyword_parsecode*>(kttv); |
| 1699 | return ktt->parsecode; |
| 1700 | } |
| 1701 | |
| 1702 | // The following structs are used within the VersionInfo class as well |
| 1703 | // as in the bison helper functions. They store the information |
| 1704 | // parsed from the version script. |
| 1705 | |
| 1706 | // A single version expression. |
| 1707 | // For example, pattern="std::map*" and language="C++". |
| 1708 | // pattern and language should be from the stringpool |
| 1709 | struct Version_expression { |
| 1710 | Version_expression(const std::string& pattern, |
| 1711 | const std::string& language, |
| 1712 | bool exact_match) |
| 1713 | : pattern(pattern), language(language), exact_match(exact_match) {} |
| 1714 | |
| 1715 | std::string pattern; |
| 1716 | std::string language; |
| 1717 | // If false, we use glob() to match pattern. If true, we use strcmp(). |
| 1718 | bool exact_match; |
| 1719 | }; |
| 1720 | |
| 1721 | |
| 1722 | // A list of expressions. |
| 1723 | struct Version_expression_list { |
| 1724 | std::vector<struct Version_expression> expressions; |
| 1725 | }; |
| 1726 | |
| 1727 | |
| 1728 | // A list of which versions upon which another version depends. |
| 1729 | // Strings should be from the Stringpool. |
| 1730 | struct Version_dependency_list { |
| 1731 | std::vector<std::string> dependencies; |
| 1732 | }; |
| 1733 | |
| 1734 | |
| 1735 | // The total definition of a version. It includes the tag for the |
| 1736 | // version, its global and local expressions, and any dependencies. |
| 1737 | struct Version_tree { |
| 1738 | Version_tree() |
| 1739 | : tag(), global(NULL), local(NULL), dependencies(NULL) {} |
| 1740 | |
| 1741 | std::string tag; |
| 1742 | const struct Version_expression_list* global; |
| 1743 | const struct Version_expression_list* local; |
| 1744 | const struct Version_dependency_list* dependencies; |
| 1745 | }; |
| 1746 | |
| 1747 | Version_script_info::~Version_script_info() |
| 1748 | { |
| 1749 | this->clear(); |
| 1750 | } |
| 1751 | |
| 1752 | void |
| 1753 | Version_script_info::clear() |
| 1754 | { |
| 1755 | for (size_t k = 0; k < dependency_lists_.size(); ++k) |
| 1756 | delete dependency_lists_[k]; |
| 1757 | this->dependency_lists_.clear(); |
| 1758 | for (size_t k = 0; k < version_trees_.size(); ++k) |
| 1759 | delete version_trees_[k]; |
| 1760 | this->version_trees_.clear(); |
| 1761 | for (size_t k = 0; k < expression_lists_.size(); ++k) |
| 1762 | delete expression_lists_[k]; |
| 1763 | this->expression_lists_.clear(); |
| 1764 | } |
| 1765 | |
| 1766 | std::vector<std::string> |
| 1767 | Version_script_info::get_versions() const |
| 1768 | { |
| 1769 | std::vector<std::string> ret; |
| 1770 | for (size_t j = 0; j < version_trees_.size(); ++j) |
| 1771 | if (!this->version_trees_[j]->tag.empty()) |
| 1772 | ret.push_back(this->version_trees_[j]->tag); |
| 1773 | return ret; |
| 1774 | } |
| 1775 | |
| 1776 | std::vector<std::string> |
| 1777 | Version_script_info::get_dependencies(const char* version) const |
| 1778 | { |
| 1779 | std::vector<std::string> ret; |
| 1780 | for (size_t j = 0; j < version_trees_.size(); ++j) |
| 1781 | if (version_trees_[j]->tag == version) |
| 1782 | { |
| 1783 | const struct Version_dependency_list* deps = |
| 1784 | version_trees_[j]->dependencies; |
| 1785 | if (deps != NULL) |
| 1786 | for (size_t k = 0; k < deps->dependencies.size(); ++k) |
| 1787 | ret.push_back(deps->dependencies[k]); |
| 1788 | return ret; |
| 1789 | } |
| 1790 | return ret; |
| 1791 | } |
| 1792 | |
| 1793 | // Look up SYMBOL_NAME in the list of versions. If CHECK_GLOBAL is |
| 1794 | // true look at the globally visible symbols, otherwise look at the |
| 1795 | // symbols listed as "local:". Return true if the symbol is found, |
| 1796 | // false otherwise. If the symbol is found, then if PVERSION is not |
| 1797 | // NULL, set *PVERSION to the version. |
| 1798 | |
| 1799 | bool |
| 1800 | Version_script_info::get_symbol_version_helper(const char* symbol_name, |
| 1801 | bool check_global, |
| 1802 | std::string* pversion) const |
| 1803 | { |
| 1804 | for (size_t j = 0; j < version_trees_.size(); ++j) |
| 1805 | { |
| 1806 | // Is it a global symbol for this version? |
| 1807 | const Version_expression_list* explist = |
| 1808 | check_global ? version_trees_[j]->global : version_trees_[j]->local; |
| 1809 | if (explist != NULL) |
| 1810 | for (size_t k = 0; k < explist->expressions.size(); ++k) |
| 1811 | { |
| 1812 | const char* name_to_match = symbol_name; |
| 1813 | const struct Version_expression& exp = explist->expressions[k]; |
| 1814 | char* demangled_name = NULL; |
| 1815 | if (exp.language == "C++") |
| 1816 | { |
| 1817 | demangled_name = cplus_demangle(symbol_name, |
| 1818 | DMGL_ANSI | DMGL_PARAMS); |
| 1819 | // This isn't a C++ symbol. |
| 1820 | if (demangled_name == NULL) |
| 1821 | continue; |
| 1822 | name_to_match = demangled_name; |
| 1823 | } |
| 1824 | else if (exp.language == "Java") |
| 1825 | { |
| 1826 | demangled_name = cplus_demangle(symbol_name, |
| 1827 | (DMGL_ANSI | DMGL_PARAMS |
| 1828 | | DMGL_JAVA)); |
| 1829 | // This isn't a Java symbol. |
| 1830 | if (demangled_name == NULL) |
| 1831 | continue; |
| 1832 | name_to_match = demangled_name; |
| 1833 | } |
| 1834 | bool matched; |
| 1835 | if (exp.exact_match) |
| 1836 | matched = strcmp(exp.pattern.c_str(), name_to_match) == 0; |
| 1837 | else |
| 1838 | matched = fnmatch(exp.pattern.c_str(), name_to_match, |
| 1839 | FNM_NOESCAPE) == 0; |
| 1840 | if (demangled_name != NULL) |
| 1841 | free(demangled_name); |
| 1842 | if (matched) |
| 1843 | { |
| 1844 | if (pversion != NULL) |
| 1845 | *pversion = this->version_trees_[j]->tag; |
| 1846 | return true; |
| 1847 | } |
| 1848 | } |
| 1849 | } |
| 1850 | return false; |
| 1851 | } |
| 1852 | |
| 1853 | struct Version_dependency_list* |
| 1854 | Version_script_info::allocate_dependency_list() |
| 1855 | { |
| 1856 | dependency_lists_.push_back(new Version_dependency_list); |
| 1857 | return dependency_lists_.back(); |
| 1858 | } |
| 1859 | |
| 1860 | struct Version_expression_list* |
| 1861 | Version_script_info::allocate_expression_list() |
| 1862 | { |
| 1863 | expression_lists_.push_back(new Version_expression_list); |
| 1864 | return expression_lists_.back(); |
| 1865 | } |
| 1866 | |
| 1867 | struct Version_tree* |
| 1868 | Version_script_info::allocate_version_tree() |
| 1869 | { |
| 1870 | version_trees_.push_back(new Version_tree); |
| 1871 | return version_trees_.back(); |
| 1872 | } |
| 1873 | |
| 1874 | // Print for debugging. |
| 1875 | |
| 1876 | void |
| 1877 | Version_script_info::print(FILE* f) const |
| 1878 | { |
| 1879 | if (this->empty()) |
| 1880 | return; |
| 1881 | |
| 1882 | fprintf(f, "VERSION {"); |
| 1883 | |
| 1884 | for (size_t i = 0; i < this->version_trees_.size(); ++i) |
| 1885 | { |
| 1886 | const Version_tree* vt = this->version_trees_[i]; |
| 1887 | |
| 1888 | if (vt->tag.empty()) |
| 1889 | fprintf(f, " {\n"); |
| 1890 | else |
| 1891 | fprintf(f, " %s {\n", vt->tag.c_str()); |
| 1892 | |
| 1893 | if (vt->global != NULL) |
| 1894 | { |
| 1895 | fprintf(f, " global :\n"); |
| 1896 | this->print_expression_list(f, vt->global); |
| 1897 | } |
| 1898 | |
| 1899 | if (vt->local != NULL) |
| 1900 | { |
| 1901 | fprintf(f, " local :\n"); |
| 1902 | this->print_expression_list(f, vt->local); |
| 1903 | } |
| 1904 | |
| 1905 | fprintf(f, " }"); |
| 1906 | if (vt->dependencies != NULL) |
| 1907 | { |
| 1908 | const Version_dependency_list* deps = vt->dependencies; |
| 1909 | for (size_t j = 0; j < deps->dependencies.size(); ++j) |
| 1910 | { |
| 1911 | if (j < deps->dependencies.size() - 1) |
| 1912 | fprintf(f, "\n"); |
| 1913 | fprintf(f, " %s", deps->dependencies[j].c_str()); |
| 1914 | } |
| 1915 | } |
| 1916 | fprintf(f, ";\n"); |
| 1917 | } |
| 1918 | |
| 1919 | fprintf(f, "}\n"); |
| 1920 | } |
| 1921 | |
| 1922 | void |
| 1923 | Version_script_info::print_expression_list( |
| 1924 | FILE* f, |
| 1925 | const Version_expression_list* vel) const |
| 1926 | { |
| 1927 | std::string current_language; |
| 1928 | for (size_t i = 0; i < vel->expressions.size(); ++i) |
| 1929 | { |
| 1930 | const Version_expression& ve(vel->expressions[i]); |
| 1931 | |
| 1932 | if (ve.language != current_language) |
| 1933 | { |
| 1934 | if (!current_language.empty()) |
| 1935 | fprintf(f, " }\n"); |
| 1936 | fprintf(f, " extern \"%s\" {\n", ve.language.c_str()); |
| 1937 | current_language = ve.language; |
| 1938 | } |
| 1939 | |
| 1940 | fprintf(f, " "); |
| 1941 | if (!current_language.empty()) |
| 1942 | fprintf(f, " "); |
| 1943 | |
| 1944 | if (ve.exact_match) |
| 1945 | fprintf(f, "\""); |
| 1946 | fprintf(f, "%s", ve.pattern.c_str()); |
| 1947 | if (ve.exact_match) |
| 1948 | fprintf(f, "\""); |
| 1949 | |
| 1950 | fprintf(f, "\n"); |
| 1951 | } |
| 1952 | |
| 1953 | if (!current_language.empty()) |
| 1954 | fprintf(f, " }\n"); |
| 1955 | } |
| 1956 | |
| 1957 | } // End namespace gold. |
| 1958 | |
| 1959 | // The remaining functions are extern "C", so it's clearer to not put |
| 1960 | // them in namespace gold. |
| 1961 | |
| 1962 | using namespace gold; |
| 1963 | |
| 1964 | // This function is called by the bison parser to return the next |
| 1965 | // token. |
| 1966 | |
| 1967 | extern "C" int |
| 1968 | yylex(YYSTYPE* lvalp, void* closurev) |
| 1969 | { |
| 1970 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 1971 | const Token* token = closure->next_token(); |
| 1972 | switch (token->classification()) |
| 1973 | { |
| 1974 | default: |
| 1975 | gold_unreachable(); |
| 1976 | |
| 1977 | case Token::TOKEN_INVALID: |
| 1978 | yyerror(closurev, "invalid character"); |
| 1979 | return 0; |
| 1980 | |
| 1981 | case Token::TOKEN_EOF: |
| 1982 | return 0; |
| 1983 | |
| 1984 | case Token::TOKEN_STRING: |
| 1985 | { |
| 1986 | // This is either a keyword or a STRING. |
| 1987 | size_t len; |
| 1988 | const char* str = token->string_value(&len); |
| 1989 | int parsecode = 0; |
| 1990 | switch (closure->lex_mode()) |
| 1991 | { |
| 1992 | case Lex::LINKER_SCRIPT: |
| 1993 | parsecode = script_keywords.keyword_to_parsecode(str, len); |
| 1994 | break; |
| 1995 | case Lex::VERSION_SCRIPT: |
| 1996 | parsecode = version_script_keywords.keyword_to_parsecode(str, len); |
| 1997 | break; |
| 1998 | case Lex::DYNAMIC_LIST: |
| 1999 | parsecode = dynamic_list_keywords.keyword_to_parsecode(str, len); |
| 2000 | break; |
| 2001 | default: |
| 2002 | break; |
| 2003 | } |
| 2004 | if (parsecode != 0) |
| 2005 | return parsecode; |
| 2006 | lvalp->string.value = str; |
| 2007 | lvalp->string.length = len; |
| 2008 | return STRING; |
| 2009 | } |
| 2010 | |
| 2011 | case Token::TOKEN_QUOTED_STRING: |
| 2012 | lvalp->string.value = token->string_value(&lvalp->string.length); |
| 2013 | return QUOTED_STRING; |
| 2014 | |
| 2015 | case Token::TOKEN_OPERATOR: |
| 2016 | return token->operator_value(); |
| 2017 | |
| 2018 | case Token::TOKEN_INTEGER: |
| 2019 | lvalp->integer = token->integer_value(); |
| 2020 | return INTEGER; |
| 2021 | } |
| 2022 | } |
| 2023 | |
| 2024 | // This function is called by the bison parser to report an error. |
| 2025 | |
| 2026 | extern "C" void |
| 2027 | yyerror(void* closurev, const char* message) |
| 2028 | { |
| 2029 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2030 | gold_error(_("%s:%d:%d: %s"), closure->filename(), closure->lineno(), |
| 2031 | closure->charpos(), message); |
| 2032 | } |
| 2033 | |
| 2034 | // Called by the bison parser to add a file to the link. |
| 2035 | |
| 2036 | extern "C" void |
| 2037 | script_add_file(void* closurev, const char* name, size_t length) |
| 2038 | { |
| 2039 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2040 | |
| 2041 | // If this is an absolute path, and we found the script in the |
| 2042 | // sysroot, then we want to prepend the sysroot to the file name. |
| 2043 | // For example, this is how we handle a cross link to the x86_64 |
| 2044 | // libc.so, which refers to /lib/libc.so.6. |
| 2045 | std::string name_string(name, length); |
| 2046 | const char* extra_search_path = "."; |
| 2047 | std::string script_directory; |
| 2048 | if (IS_ABSOLUTE_PATH(name_string.c_str())) |
| 2049 | { |
| 2050 | if (closure->is_in_sysroot()) |
| 2051 | { |
| 2052 | const std::string& sysroot(parameters->options().sysroot()); |
| 2053 | gold_assert(!sysroot.empty()); |
| 2054 | name_string = sysroot + name_string; |
| 2055 | } |
| 2056 | } |
| 2057 | else |
| 2058 | { |
| 2059 | // In addition to checking the normal library search path, we |
| 2060 | // also want to check in the script-directory. |
| 2061 | const char *slash = strrchr(closure->filename(), '/'); |
| 2062 | if (slash != NULL) |
| 2063 | { |
| 2064 | script_directory.assign(closure->filename(), |
| 2065 | slash - closure->filename() + 1); |
| 2066 | extra_search_path = script_directory.c_str(); |
| 2067 | } |
| 2068 | } |
| 2069 | |
| 2070 | Input_file_argument file(name_string.c_str(), false, extra_search_path, |
| 2071 | false, closure->position_dependent_options()); |
| 2072 | closure->inputs()->add_file(file); |
| 2073 | } |
| 2074 | |
| 2075 | // Called by the bison parser to start a group. If we are already in |
| 2076 | // a group, that means that this script was invoked within a |
| 2077 | // --start-group --end-group sequence on the command line, or that |
| 2078 | // this script was found in a GROUP of another script. In that case, |
| 2079 | // we simply continue the existing group, rather than starting a new |
| 2080 | // one. It is possible to construct a case in which this will do |
| 2081 | // something other than what would happen if we did a recursive group, |
| 2082 | // but it's hard to imagine why the different behaviour would be |
| 2083 | // useful for a real program. Avoiding recursive groups is simpler |
| 2084 | // and more efficient. |
| 2085 | |
| 2086 | extern "C" void |
| 2087 | script_start_group(void* closurev) |
| 2088 | { |
| 2089 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2090 | if (!closure->in_group()) |
| 2091 | closure->inputs()->start_group(); |
| 2092 | } |
| 2093 | |
| 2094 | // Called by the bison parser at the end of a group. |
| 2095 | |
| 2096 | extern "C" void |
| 2097 | script_end_group(void* closurev) |
| 2098 | { |
| 2099 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2100 | if (!closure->in_group()) |
| 2101 | closure->inputs()->end_group(); |
| 2102 | } |
| 2103 | |
| 2104 | // Called by the bison parser to start an AS_NEEDED list. |
| 2105 | |
| 2106 | extern "C" void |
| 2107 | script_start_as_needed(void* closurev) |
| 2108 | { |
| 2109 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2110 | closure->position_dependent_options().set_as_needed(true); |
| 2111 | } |
| 2112 | |
| 2113 | // Called by the bison parser at the end of an AS_NEEDED list. |
| 2114 | |
| 2115 | extern "C" void |
| 2116 | script_end_as_needed(void* closurev) |
| 2117 | { |
| 2118 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2119 | closure->position_dependent_options().set_as_needed(false); |
| 2120 | } |
| 2121 | |
| 2122 | // Called by the bison parser to set the entry symbol. |
| 2123 | |
| 2124 | extern "C" void |
| 2125 | script_set_entry(void* closurev, const char* entry, size_t length) |
| 2126 | { |
| 2127 | // We'll parse this exactly the same as --entry=ENTRY on the commandline |
| 2128 | // TODO(csilvers): FIXME -- call set_entry directly. |
| 2129 | std::string arg("--entry="); |
| 2130 | arg.append(entry, length); |
| 2131 | script_parse_option(closurev, arg.c_str(), arg.size()); |
| 2132 | } |
| 2133 | |
| 2134 | // Called by the bison parser to set whether to define common symbols. |
| 2135 | |
| 2136 | extern "C" void |
| 2137 | script_set_common_allocation(void* closurev, int set) |
| 2138 | { |
| 2139 | const char* arg = set != 0 ? "--define-common" : "--no-define-common"; |
| 2140 | script_parse_option(closurev, arg, strlen(arg)); |
| 2141 | } |
| 2142 | |
| 2143 | // Called by the bison parser to define a symbol. |
| 2144 | |
| 2145 | extern "C" void |
| 2146 | script_set_symbol(void* closurev, const char* name, size_t length, |
| 2147 | Expression* value, int providei, int hiddeni) |
| 2148 | { |
| 2149 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2150 | const bool provide = providei != 0; |
| 2151 | const bool hidden = hiddeni != 0; |
| 2152 | closure->script_options()->add_symbol_assignment(name, length, value, |
| 2153 | provide, hidden); |
| 2154 | } |
| 2155 | |
| 2156 | // Called by the bison parser to add an assertion. |
| 2157 | |
| 2158 | extern "C" void |
| 2159 | script_add_assertion(void* closurev, Expression* check, const char* message, |
| 2160 | size_t messagelen) |
| 2161 | { |
| 2162 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2163 | closure->script_options()->add_assertion(check, message, messagelen); |
| 2164 | } |
| 2165 | |
| 2166 | // Called by the bison parser to parse an OPTION. |
| 2167 | |
| 2168 | extern "C" void |
| 2169 | script_parse_option(void* closurev, const char* option, size_t length) |
| 2170 | { |
| 2171 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2172 | // We treat the option as a single command-line option, even if |
| 2173 | // it has internal whitespace. |
| 2174 | if (closure->command_line() == NULL) |
| 2175 | { |
| 2176 | // There are some options that we could handle here--e.g., |
| 2177 | // -lLIBRARY. Should we bother? |
| 2178 | gold_warning(_("%s:%d:%d: ignoring command OPTION; OPTION is only valid" |
| 2179 | " for scripts specified via -T/--script"), |
| 2180 | closure->filename(), closure->lineno(), closure->charpos()); |
| 2181 | } |
| 2182 | else |
| 2183 | { |
| 2184 | bool past_a_double_dash_option = false; |
| 2185 | const char* mutable_option = strndup(option, length); |
| 2186 | gold_assert(mutable_option != NULL); |
| 2187 | closure->command_line()->process_one_option(1, &mutable_option, 0, |
| 2188 | &past_a_double_dash_option); |
| 2189 | // The General_options class will quite possibly store a pointer |
| 2190 | // into mutable_option, so we can't free it. In cases the class |
| 2191 | // does not store such a pointer, this is a memory leak. Alas. :( |
| 2192 | } |
| 2193 | } |
| 2194 | |
| 2195 | // Called by the bison parser to handle SEARCH_DIR. This is handled |
| 2196 | // exactly like a -L option. |
| 2197 | |
| 2198 | extern "C" void |
| 2199 | script_add_search_dir(void* closurev, const char* option, size_t length) |
| 2200 | { |
| 2201 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2202 | if (closure->command_line() == NULL) |
| 2203 | gold_warning(_("%s:%d:%d: ignoring SEARCH_DIR; SEARCH_DIR is only valid" |
| 2204 | " for scripts specified via -T/--script"), |
| 2205 | closure->filename(), closure->lineno(), closure->charpos()); |
| 2206 | else |
| 2207 | { |
| 2208 | std::string s = "-L" + std::string(option, length); |
| 2209 | script_parse_option(closurev, s.c_str(), s.size()); |
| 2210 | } |
| 2211 | } |
| 2212 | |
| 2213 | /* Called by the bison parser to push the lexer into expression |
| 2214 | mode. */ |
| 2215 | |
| 2216 | extern "C" void |
| 2217 | script_push_lex_into_expression_mode(void* closurev) |
| 2218 | { |
| 2219 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2220 | closure->push_lex_mode(Lex::EXPRESSION); |
| 2221 | } |
| 2222 | |
| 2223 | /* Called by the bison parser to push the lexer into version |
| 2224 | mode. */ |
| 2225 | |
| 2226 | extern "C" void |
| 2227 | script_push_lex_into_version_mode(void* closurev) |
| 2228 | { |
| 2229 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2230 | closure->push_lex_mode(Lex::VERSION_SCRIPT); |
| 2231 | } |
| 2232 | |
| 2233 | /* Called by the bison parser to pop the lexer mode. */ |
| 2234 | |
| 2235 | extern "C" void |
| 2236 | script_pop_lex_mode(void* closurev) |
| 2237 | { |
| 2238 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2239 | closure->pop_lex_mode(); |
| 2240 | } |
| 2241 | |
| 2242 | // Register an entire version node. For example: |
| 2243 | // |
| 2244 | // GLIBC_2.1 { |
| 2245 | // global: foo; |
| 2246 | // } GLIBC_2.0; |
| 2247 | // |
| 2248 | // - tag is "GLIBC_2.1" |
| 2249 | // - tree contains the information "global: foo" |
| 2250 | // - deps contains "GLIBC_2.0" |
| 2251 | |
| 2252 | extern "C" void |
| 2253 | script_register_vers_node(void*, |
| 2254 | const char* tag, |
| 2255 | int taglen, |
| 2256 | struct Version_tree *tree, |
| 2257 | struct Version_dependency_list *deps) |
| 2258 | { |
| 2259 | gold_assert(tree != NULL); |
| 2260 | tree->dependencies = deps; |
| 2261 | if (tag != NULL) |
| 2262 | tree->tag = std::string(tag, taglen); |
| 2263 | } |
| 2264 | |
| 2265 | // Add a dependencies to the list of existing dependencies, if any, |
| 2266 | // and return the expanded list. |
| 2267 | |
| 2268 | extern "C" struct Version_dependency_list * |
| 2269 | script_add_vers_depend(void* closurev, |
| 2270 | struct Version_dependency_list *all_deps, |
| 2271 | const char *depend_to_add, int deplen) |
| 2272 | { |
| 2273 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2274 | if (all_deps == NULL) |
| 2275 | all_deps = closure->version_script()->allocate_dependency_list(); |
| 2276 | all_deps->dependencies.push_back(std::string(depend_to_add, deplen)); |
| 2277 | return all_deps; |
| 2278 | } |
| 2279 | |
| 2280 | // Add a pattern expression to an existing list of expressions, if any. |
| 2281 | // TODO: In the old linker, the last argument used to be a bool, but I |
| 2282 | // don't know what it meant. |
| 2283 | |
| 2284 | extern "C" struct Version_expression_list * |
| 2285 | script_new_vers_pattern(void* closurev, |
| 2286 | struct Version_expression_list *expressions, |
| 2287 | const char *pattern, int patlen, int exact_match) |
| 2288 | { |
| 2289 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2290 | if (expressions == NULL) |
| 2291 | expressions = closure->version_script()->allocate_expression_list(); |
| 2292 | expressions->expressions.push_back( |
| 2293 | Version_expression(std::string(pattern, patlen), |
| 2294 | closure->get_current_language(), |
| 2295 | static_cast<bool>(exact_match))); |
| 2296 | return expressions; |
| 2297 | } |
| 2298 | |
| 2299 | // Attaches b to the end of a, and clears b. So a = a + b and b = {}. |
| 2300 | |
| 2301 | extern "C" struct Version_expression_list* |
| 2302 | script_merge_expressions(struct Version_expression_list *a, |
| 2303 | struct Version_expression_list *b) |
| 2304 | { |
| 2305 | a->expressions.insert(a->expressions.end(), |
| 2306 | b->expressions.begin(), b->expressions.end()); |
| 2307 | // We could delete b and remove it from expressions_lists_, but |
| 2308 | // that's a lot of work. This works just as well. |
| 2309 | b->expressions.clear(); |
| 2310 | return a; |
| 2311 | } |
| 2312 | |
| 2313 | // Combine the global and local expressions into a a Version_tree. |
| 2314 | |
| 2315 | extern "C" struct Version_tree * |
| 2316 | script_new_vers_node(void* closurev, |
| 2317 | struct Version_expression_list *global, |
| 2318 | struct Version_expression_list *local) |
| 2319 | { |
| 2320 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2321 | Version_tree* tree = closure->version_script()->allocate_version_tree(); |
| 2322 | tree->global = global; |
| 2323 | tree->local = local; |
| 2324 | return tree; |
| 2325 | } |
| 2326 | |
| 2327 | // Handle a transition in language, such as at the |
| 2328 | // start or end of 'extern "C++"' |
| 2329 | |
| 2330 | extern "C" void |
| 2331 | version_script_push_lang(void* closurev, const char* lang, int langlen) |
| 2332 | { |
| 2333 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2334 | closure->push_language(std::string(lang, langlen)); |
| 2335 | } |
| 2336 | |
| 2337 | extern "C" void |
| 2338 | version_script_pop_lang(void* closurev) |
| 2339 | { |
| 2340 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2341 | closure->pop_language(); |
| 2342 | } |
| 2343 | |
| 2344 | // Called by the bison parser to start a SECTIONS clause. |
| 2345 | |
| 2346 | extern "C" void |
| 2347 | script_start_sections(void* closurev) |
| 2348 | { |
| 2349 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2350 | closure->script_options()->script_sections()->start_sections(); |
| 2351 | } |
| 2352 | |
| 2353 | // Called by the bison parser to finish a SECTIONS clause. |
| 2354 | |
| 2355 | extern "C" void |
| 2356 | script_finish_sections(void* closurev) |
| 2357 | { |
| 2358 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2359 | closure->script_options()->script_sections()->finish_sections(); |
| 2360 | } |
| 2361 | |
| 2362 | // Start processing entries for an output section. |
| 2363 | |
| 2364 | extern "C" void |
| 2365 | script_start_output_section(void* closurev, const char* name, size_t namelen, |
| 2366 | const struct Parser_output_section_header* header) |
| 2367 | { |
| 2368 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2369 | closure->script_options()->script_sections()->start_output_section(name, |
| 2370 | namelen, |
| 2371 | header); |
| 2372 | } |
| 2373 | |
| 2374 | // Finish processing entries for an output section. |
| 2375 | |
| 2376 | extern "C" void |
| 2377 | script_finish_output_section(void* closurev, |
| 2378 | const struct Parser_output_section_trailer* trail) |
| 2379 | { |
| 2380 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2381 | closure->script_options()->script_sections()->finish_output_section(trail); |
| 2382 | } |
| 2383 | |
| 2384 | // Add a data item (e.g., "WORD (0)") to the current output section. |
| 2385 | |
| 2386 | extern "C" void |
| 2387 | script_add_data(void* closurev, int data_token, Expression* val) |
| 2388 | { |
| 2389 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2390 | int size; |
| 2391 | bool is_signed = true; |
| 2392 | switch (data_token) |
| 2393 | { |
| 2394 | case QUAD: |
| 2395 | size = 8; |
| 2396 | is_signed = false; |
| 2397 | break; |
| 2398 | case SQUAD: |
| 2399 | size = 8; |
| 2400 | break; |
| 2401 | case LONG: |
| 2402 | size = 4; |
| 2403 | break; |
| 2404 | case SHORT: |
| 2405 | size = 2; |
| 2406 | break; |
| 2407 | case BYTE: |
| 2408 | size = 1; |
| 2409 | break; |
| 2410 | default: |
| 2411 | gold_unreachable(); |
| 2412 | } |
| 2413 | closure->script_options()->script_sections()->add_data(size, is_signed, val); |
| 2414 | } |
| 2415 | |
| 2416 | // Add a clause setting the fill value to the current output section. |
| 2417 | |
| 2418 | extern "C" void |
| 2419 | script_add_fill(void* closurev, Expression* val) |
| 2420 | { |
| 2421 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2422 | closure->script_options()->script_sections()->add_fill(val); |
| 2423 | } |
| 2424 | |
| 2425 | // Add a new input section specification to the current output |
| 2426 | // section. |
| 2427 | |
| 2428 | extern "C" void |
| 2429 | script_add_input_section(void* closurev, |
| 2430 | const struct Input_section_spec* spec, |
| 2431 | int keepi) |
| 2432 | { |
| 2433 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2434 | bool keep = keepi != 0; |
| 2435 | closure->script_options()->script_sections()->add_input_section(spec, keep); |
| 2436 | } |
| 2437 | |
| 2438 | // When we see DATA_SEGMENT_ALIGN we record that following output |
| 2439 | // sections may be relro. |
| 2440 | |
| 2441 | extern "C" void |
| 2442 | script_data_segment_align(void* closurev) |
| 2443 | { |
| 2444 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2445 | if (!closure->script_options()->saw_sections_clause()) |
| 2446 | gold_error(_("%s:%d:%d: DATA_SEGMENT_ALIGN not in SECTIONS clause"), |
| 2447 | closure->filename(), closure->lineno(), closure->charpos()); |
| 2448 | else |
| 2449 | closure->script_options()->script_sections()->data_segment_align(); |
| 2450 | } |
| 2451 | |
| 2452 | // When we see DATA_SEGMENT_RELRO_END we know that all output sections |
| 2453 | // since DATA_SEGMENT_ALIGN should be relro. |
| 2454 | |
| 2455 | extern "C" void |
| 2456 | script_data_segment_relro_end(void* closurev) |
| 2457 | { |
| 2458 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2459 | if (!closure->script_options()->saw_sections_clause()) |
| 2460 | gold_error(_("%s:%d:%d: DATA_SEGMENT_ALIGN not in SECTIONS clause"), |
| 2461 | closure->filename(), closure->lineno(), closure->charpos()); |
| 2462 | else |
| 2463 | closure->script_options()->script_sections()->data_segment_relro_end(); |
| 2464 | } |
| 2465 | |
| 2466 | // Create a new list of string/sort pairs. |
| 2467 | |
| 2468 | extern "C" String_sort_list_ptr |
| 2469 | script_new_string_sort_list(const struct Wildcard_section* string_sort) |
| 2470 | { |
| 2471 | return new String_sort_list(1, *string_sort); |
| 2472 | } |
| 2473 | |
| 2474 | // Add an entry to a list of string/sort pairs. The way the parser |
| 2475 | // works permits us to simply modify the first parameter, rather than |
| 2476 | // copy the vector. |
| 2477 | |
| 2478 | extern "C" String_sort_list_ptr |
| 2479 | script_string_sort_list_add(String_sort_list_ptr pv, |
| 2480 | const struct Wildcard_section* string_sort) |
| 2481 | { |
| 2482 | if (pv == NULL) |
| 2483 | return script_new_string_sort_list(string_sort); |
| 2484 | else |
| 2485 | { |
| 2486 | pv->push_back(*string_sort); |
| 2487 | return pv; |
| 2488 | } |
| 2489 | } |
| 2490 | |
| 2491 | // Create a new list of strings. |
| 2492 | |
| 2493 | extern "C" String_list_ptr |
| 2494 | script_new_string_list(const char* str, size_t len) |
| 2495 | { |
| 2496 | return new String_list(1, std::string(str, len)); |
| 2497 | } |
| 2498 | |
| 2499 | // Add an element to a list of strings. The way the parser works |
| 2500 | // permits us to simply modify the first parameter, rather than copy |
| 2501 | // the vector. |
| 2502 | |
| 2503 | extern "C" String_list_ptr |
| 2504 | script_string_list_push_back(String_list_ptr pv, const char* str, size_t len) |
| 2505 | { |
| 2506 | if (pv == NULL) |
| 2507 | return script_new_string_list(str, len); |
| 2508 | else |
| 2509 | { |
| 2510 | pv->push_back(std::string(str, len)); |
| 2511 | return pv; |
| 2512 | } |
| 2513 | } |
| 2514 | |
| 2515 | // Concatenate two string lists. Either or both may be NULL. The way |
| 2516 | // the parser works permits us to modify the parameters, rather than |
| 2517 | // copy the vector. |
| 2518 | |
| 2519 | extern "C" String_list_ptr |
| 2520 | script_string_list_append(String_list_ptr pv1, String_list_ptr pv2) |
| 2521 | { |
| 2522 | if (pv1 == NULL) |
| 2523 | return pv2; |
| 2524 | if (pv2 == NULL) |
| 2525 | return pv1; |
| 2526 | pv1->insert(pv1->end(), pv2->begin(), pv2->end()); |
| 2527 | return pv1; |
| 2528 | } |
| 2529 | |
| 2530 | // Add a new program header. |
| 2531 | |
| 2532 | extern "C" void |
| 2533 | script_add_phdr(void* closurev, const char* name, size_t namelen, |
| 2534 | unsigned int type, const Phdr_info* info) |
| 2535 | { |
| 2536 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
| 2537 | bool includes_filehdr = info->includes_filehdr != 0; |
| 2538 | bool includes_phdrs = info->includes_phdrs != 0; |
| 2539 | bool is_flags_valid = info->is_flags_valid != 0; |
| 2540 | Script_sections* ss = closure->script_options()->script_sections(); |
| 2541 | ss->add_phdr(name, namelen, type, includes_filehdr, includes_phdrs, |
| 2542 | is_flags_valid, info->flags, info->load_address); |
| 2543 | } |
| 2544 | |
| 2545 | // Convert a program header string to a type. |
| 2546 | |
| 2547 | #define PHDR_TYPE(NAME) { #NAME, sizeof(#NAME) - 1, elfcpp::NAME } |
| 2548 | |
| 2549 | static struct |
| 2550 | { |
| 2551 | const char* name; |
| 2552 | size_t namelen; |
| 2553 | unsigned int val; |
| 2554 | } phdr_type_names[] = |
| 2555 | { |
| 2556 | PHDR_TYPE(PT_NULL), |
| 2557 | PHDR_TYPE(PT_LOAD), |
| 2558 | PHDR_TYPE(PT_DYNAMIC), |
| 2559 | PHDR_TYPE(PT_INTERP), |
| 2560 | PHDR_TYPE(PT_NOTE), |
| 2561 | PHDR_TYPE(PT_SHLIB), |
| 2562 | PHDR_TYPE(PT_PHDR), |
| 2563 | PHDR_TYPE(PT_TLS), |
| 2564 | PHDR_TYPE(PT_GNU_EH_FRAME), |
| 2565 | PHDR_TYPE(PT_GNU_STACK), |
| 2566 | PHDR_TYPE(PT_GNU_RELRO) |
| 2567 | }; |
| 2568 | |
| 2569 | extern "C" unsigned int |
| 2570 | script_phdr_string_to_type(void* closurev, const char* name, size_t namelen) |
| 2571 | { |
| 2572 | for (unsigned int i = 0; |
| 2573 | i < sizeof(phdr_type_names) / sizeof(phdr_type_names[0]); |
| 2574 | ++i) |
| 2575 | if (namelen == phdr_type_names[i].namelen |
| 2576 | && strncmp(name, phdr_type_names[i].name, namelen) == 0) |
| 2577 | return phdr_type_names[i].val; |
| 2578 | yyerror(closurev, _("unknown PHDR type (try integer)")); |
| 2579 | return elfcpp::PT_NULL; |
| 2580 | } |