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dbe717ef ILT |
1 | // script.cc -- handle linker scripts for gold. |
2 | ||
b90efa5b | 3 | // Copyright (C) 2006-2015 Free Software Foundation, Inc. |
6cb15b7f ILT |
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 | ||
dbe717ef ILT |
23 | #include "gold.h" |
24 | ||
04bf7072 ILT |
25 | #include <cstdio> |
26 | #include <cstdlib> | |
27 | #include <cstring> | |
09124467 | 28 | #include <fnmatch.h> |
dbe717ef ILT |
29 | #include <string> |
30 | #include <vector> | |
ad2d6943 | 31 | #include "filenames.h" |
dbe717ef | 32 | |
e5756efb | 33 | #include "elfcpp.h" |
09124467 | 34 | #include "demangle.h" |
3c2fafa5 | 35 | #include "dirsearch.h" |
dbe717ef ILT |
36 | #include "options.h" |
37 | #include "fileread.h" | |
38 | #include "workqueue.h" | |
39 | #include "readsyms.h" | |
ad2d6943 | 40 | #include "parameters.h" |
d391083d | 41 | #include "layout.h" |
e5756efb | 42 | #include "symtab.h" |
15f8229b | 43 | #include "target-select.h" |
dbe717ef ILT |
44 | #include "script.h" |
45 | #include "script-c.h" | |
072fe7ce | 46 | #include "incremental.h" |
dbe717ef ILT |
47 | |
48 | namespace gold | |
49 | { | |
50 | ||
51 | // A token read from a script file. We don't implement keywords here; | |
52 | // all keywords are simply represented as a string. | |
53 | ||
54 | class Token | |
55 | { | |
56 | public: | |
57 | // Token classification. | |
58 | enum Classification | |
59 | { | |
60 | // Token is invalid. | |
61 | TOKEN_INVALID, | |
62 | // Token indicates end of input. | |
63 | TOKEN_EOF, | |
64 | // Token is a string of characters. | |
65 | TOKEN_STRING, | |
e5756efb ILT |
66 | // Token is a quoted string of characters. |
67 | TOKEN_QUOTED_STRING, | |
dbe717ef ILT |
68 | // Token is an operator. |
69 | TOKEN_OPERATOR, | |
70 | // Token is a number (an integer). | |
71 | TOKEN_INTEGER | |
72 | }; | |
73 | ||
74 | // We need an empty constructor so that we can put this STL objects. | |
75 | Token() | |
e5756efb ILT |
76 | : classification_(TOKEN_INVALID), value_(NULL), value_length_(0), |
77 | opcode_(0), lineno_(0), charpos_(0) | |
dbe717ef ILT |
78 | { } |
79 | ||
80 | // A general token with no value. | |
2ea97941 ILT |
81 | Token(Classification classification, int lineno, int charpos) |
82 | : classification_(classification), value_(NULL), value_length_(0), | |
83 | opcode_(0), lineno_(lineno), charpos_(charpos) | |
a3ad94ed | 84 | { |
2ea97941 ILT |
85 | gold_assert(classification == TOKEN_INVALID |
86 | || classification == TOKEN_EOF); | |
a3ad94ed | 87 | } |
dbe717ef ILT |
88 | |
89 | // A general token with a value. | |
2ea97941 ILT |
90 | Token(Classification classification, const char* value, size_t length, |
91 | int lineno, int charpos) | |
92 | : classification_(classification), value_(value), value_length_(length), | |
93 | opcode_(0), lineno_(lineno), charpos_(charpos) | |
a3ad94ed | 94 | { |
2ea97941 ILT |
95 | gold_assert(classification != TOKEN_INVALID |
96 | && classification != TOKEN_EOF); | |
a3ad94ed | 97 | } |
dbe717ef | 98 | |
dbe717ef | 99 | // A token representing an operator. |
2ea97941 | 100 | Token(int opcode, int lineno, int charpos) |
e5756efb | 101 | : classification_(TOKEN_OPERATOR), value_(NULL), value_length_(0), |
2ea97941 | 102 | opcode_(opcode), lineno_(lineno), charpos_(charpos) |
dbe717ef ILT |
103 | { } |
104 | ||
105 | // Return whether the token is invalid. | |
106 | bool | |
107 | is_invalid() const | |
108 | { return this->classification_ == TOKEN_INVALID; } | |
109 | ||
110 | // Return whether this is an EOF token. | |
111 | bool | |
112 | is_eof() const | |
113 | { return this->classification_ == TOKEN_EOF; } | |
114 | ||
115 | // Return the token classification. | |
116 | Classification | |
117 | classification() const | |
118 | { return this->classification_; } | |
119 | ||
120 | // Return the line number at which the token starts. | |
121 | int | |
122 | lineno() const | |
123 | { return this->lineno_; } | |
124 | ||
125 | // Return the character position at this the token starts. | |
126 | int | |
127 | charpos() const | |
128 | { return this->charpos_; } | |
129 | ||
130 | // Get the value of a token. | |
131 | ||
e5756efb ILT |
132 | const char* |
133 | string_value(size_t* length) const | |
dbe717ef | 134 | { |
e5756efb ILT |
135 | gold_assert(this->classification_ == TOKEN_STRING |
136 | || this->classification_ == TOKEN_QUOTED_STRING); | |
137 | *length = this->value_length_; | |
dbe717ef ILT |
138 | return this->value_; |
139 | } | |
140 | ||
141 | int | |
142 | operator_value() const | |
143 | { | |
a3ad94ed | 144 | gold_assert(this->classification_ == TOKEN_OPERATOR); |
dbe717ef ILT |
145 | return this->opcode_; |
146 | } | |
147 | ||
e5756efb | 148 | uint64_t |
37e41b03 | 149 | integer_value() const; |
dbe717ef ILT |
150 | |
151 | private: | |
152 | // The token classification. | |
153 | Classification classification_; | |
e5756efb ILT |
154 | // The token value, for TOKEN_STRING or TOKEN_QUOTED_STRING or |
155 | // TOKEN_INTEGER. | |
156 | const char* value_; | |
157 | // The length of the token value. | |
158 | size_t value_length_; | |
dbe717ef ILT |
159 | // The token value, for TOKEN_OPERATOR. |
160 | int opcode_; | |
161 | // The line number where this token started (one based). | |
162 | int lineno_; | |
163 | // The character position within the line where this token started | |
164 | // (one based). | |
165 | int charpos_; | |
166 | }; | |
167 | ||
37e41b03 ILT |
168 | // Return the value of a TOKEN_INTEGER. |
169 | ||
170 | uint64_t | |
171 | Token::integer_value() const | |
172 | { | |
173 | gold_assert(this->classification_ == TOKEN_INTEGER); | |
174 | ||
175 | size_t len = this->value_length_; | |
176 | ||
177 | uint64_t multiplier = 1; | |
178 | char last = this->value_[len - 1]; | |
179 | if (last == 'm' || last == 'M') | |
180 | { | |
181 | multiplier = 1024 * 1024; | |
182 | --len; | |
183 | } | |
184 | else if (last == 'k' || last == 'K') | |
185 | { | |
186 | multiplier = 1024; | |
187 | --len; | |
188 | } | |
189 | ||
190 | char *end; | |
191 | uint64_t ret = strtoull(this->value_, &end, 0); | |
192 | gold_assert(static_cast<size_t>(end - this->value_) == len); | |
193 | ||
194 | return ret * multiplier; | |
195 | } | |
196 | ||
e5756efb | 197 | // This class handles lexing a file into a sequence of tokens. |
dbe717ef ILT |
198 | |
199 | class Lex | |
200 | { | |
201 | public: | |
e5756efb ILT |
202 | // We unfortunately have to support different lexing modes, because |
203 | // when reading different parts of a linker script we need to parse | |
204 | // things differently. | |
205 | enum Mode | |
206 | { | |
207 | // Reading an ordinary linker script. | |
208 | LINKER_SCRIPT, | |
209 | // Reading an expression in a linker script. | |
210 | EXPRESSION, | |
211 | // Reading a version script. | |
c82fbeee CS |
212 | VERSION_SCRIPT, |
213 | // Reading a --dynamic-list file. | |
214 | DYNAMIC_LIST | |
e5756efb ILT |
215 | }; |
216 | ||
217 | Lex(const char* input_string, size_t input_length, int parsing_token) | |
218 | : input_string_(input_string), input_length_(input_length), | |
219 | current_(input_string), mode_(LINKER_SCRIPT), | |
220 | first_token_(parsing_token), token_(), | |
221 | lineno_(1), linestart_(input_string) | |
dbe717ef ILT |
222 | { } |
223 | ||
e5756efb ILT |
224 | // Read a file into a string. |
225 | static void | |
226 | read_file(Input_file*, std::string*); | |
227 | ||
228 | // Return the next token. | |
229 | const Token* | |
230 | next_token(); | |
dbe717ef | 231 | |
e5756efb ILT |
232 | // Return the current lexing mode. |
233 | Lex::Mode | |
234 | mode() const | |
235 | { return this->mode_; } | |
dbe717ef | 236 | |
e5756efb ILT |
237 | // Set the lexing mode. |
238 | void | |
2ea97941 ILT |
239 | set_mode(Mode mode) |
240 | { this->mode_ = mode; } | |
dbe717ef ILT |
241 | |
242 | private: | |
243 | Lex(const Lex&); | |
244 | Lex& operator=(const Lex&); | |
245 | ||
dbe717ef ILT |
246 | // Make a general token with no value at the current location. |
247 | Token | |
e5756efb ILT |
248 | make_token(Token::Classification c, const char* start) const |
249 | { return Token(c, this->lineno_, start - this->linestart_ + 1); } | |
dbe717ef ILT |
250 | |
251 | // Make a general token with a value at the current location. | |
252 | Token | |
e5756efb ILT |
253 | make_token(Token::Classification c, const char* v, size_t len, |
254 | const char* start) | |
dbe717ef | 255 | const |
e5756efb | 256 | { return Token(c, v, len, this->lineno_, start - this->linestart_ + 1); } |
dbe717ef ILT |
257 | |
258 | // Make an operator token at the current location. | |
259 | Token | |
e5756efb ILT |
260 | make_token(int opcode, const char* start) const |
261 | { return Token(opcode, this->lineno_, start - this->linestart_ + 1); } | |
dbe717ef ILT |
262 | |
263 | // Make an invalid token at the current location. | |
264 | Token | |
e5756efb ILT |
265 | make_invalid_token(const char* start) |
266 | { return this->make_token(Token::TOKEN_INVALID, start); } | |
dbe717ef ILT |
267 | |
268 | // Make an EOF token at the current location. | |
269 | Token | |
e5756efb ILT |
270 | make_eof_token(const char* start) |
271 | { return this->make_token(Token::TOKEN_EOF, start); } | |
dbe717ef ILT |
272 | |
273 | // Return whether C can be the first character in a name. C2 is the | |
274 | // next character, since we sometimes need that. | |
e5756efb | 275 | inline bool |
dbe717ef ILT |
276 | can_start_name(char c, char c2); |
277 | ||
09124467 ILT |
278 | // If C can appear in a name which has already started, return a |
279 | // pointer to a character later in the token or just past | |
280 | // it. Otherwise, return NULL. | |
281 | inline const char* | |
282 | can_continue_name(const char* c); | |
dbe717ef ILT |
283 | |
284 | // Return whether C, C2, C3 can start a hex number. | |
e5756efb | 285 | inline bool |
dbe717ef ILT |
286 | can_start_hex(char c, char c2, char c3); |
287 | ||
09124467 ILT |
288 | // If C can appear in a hex number which has already started, return |
289 | // a pointer to a character later in the token or just past | |
290 | // it. Otherwise, return NULL. | |
291 | inline const char* | |
292 | can_continue_hex(const char* c); | |
dbe717ef ILT |
293 | |
294 | // Return whether C can start a non-hex number. | |
295 | static inline bool | |
296 | can_start_number(char c); | |
297 | ||
09124467 ILT |
298 | // If C can appear in a decimal number which has already started, |
299 | // return a pointer to a character later in the token or just past | |
300 | // it. Otherwise, return NULL. | |
301 | inline const char* | |
302 | can_continue_number(const char* c) | |
303 | { return Lex::can_start_number(*c) ? c + 1 : NULL; } | |
dbe717ef ILT |
304 | |
305 | // If C1 C2 C3 form a valid three character operator, return the | |
306 | // opcode. Otherwise return 0. | |
307 | static inline int | |
308 | three_char_operator(char c1, char c2, char c3); | |
309 | ||
310 | // If C1 C2 form a valid two character operator, return the opcode. | |
311 | // Otherwise return 0. | |
312 | static inline int | |
313 | two_char_operator(char c1, char c2); | |
314 | ||
315 | // If C1 is a valid one character operator, return the opcode. | |
316 | // Otherwise return 0. | |
317 | static inline int | |
318 | one_char_operator(char c1); | |
319 | ||
320 | // Read the next token. | |
321 | Token | |
322 | get_token(const char**); | |
323 | ||
324 | // Skip a C style /* */ comment. Return false if the comment did | |
325 | // not end. | |
326 | bool | |
327 | skip_c_comment(const char**); | |
328 | ||
329 | // Skip a line # comment. Return false if there was no newline. | |
330 | bool | |
331 | skip_line_comment(const char**); | |
332 | ||
333 | // Build a token CLASSIFICATION from all characters that match | |
334 | // CAN_CONTINUE_FN. The token starts at START. Start matching from | |
335 | // MATCH. Set *PP to the character following the token. | |
336 | inline Token | |
e5756efb | 337 | gather_token(Token::Classification, |
09124467 | 338 | const char* (Lex::*can_continue_fn)(const char*), |
dbe717ef ILT |
339 | const char* start, const char* match, const char** pp); |
340 | ||
341 | // Build a token from a quoted string. | |
342 | Token | |
343 | gather_quoted_string(const char** pp); | |
344 | ||
e5756efb ILT |
345 | // The string we are tokenizing. |
346 | const char* input_string_; | |
347 | // The length of the string. | |
348 | size_t input_length_; | |
349 | // The current offset into the string. | |
350 | const char* current_; | |
351 | // The current lexing mode. | |
352 | Mode mode_; | |
353 | // The code to use for the first token. This is set to 0 after it | |
354 | // is used. | |
355 | int first_token_; | |
356 | // The current token. | |
357 | Token token_; | |
dbe717ef ILT |
358 | // The current line number. |
359 | int lineno_; | |
e5756efb | 360 | // The start of the current line in the string. |
dbe717ef ILT |
361 | const char* linestart_; |
362 | }; | |
363 | ||
364 | // Read the whole file into memory. We don't expect linker scripts to | |
365 | // be large, so we just use a std::string as a buffer. We ignore the | |
366 | // data we've already read, so that we read aligned buffers. | |
367 | ||
368 | void | |
e5756efb | 369 | Lex::read_file(Input_file* input_file, std::string* contents) |
dbe717ef | 370 | { |
e5756efb | 371 | off_t filesize = input_file->file().filesize(); |
dbe717ef | 372 | contents->clear(); |
82dcae9d ILT |
373 | contents->reserve(filesize); |
374 | ||
dbe717ef | 375 | off_t off = 0; |
dbe717ef | 376 | unsigned char buf[BUFSIZ]; |
82dcae9d | 377 | while (off < filesize) |
dbe717ef | 378 | { |
82dcae9d ILT |
379 | off_t get = BUFSIZ; |
380 | if (get > filesize - off) | |
381 | get = filesize - off; | |
e5756efb | 382 | input_file->file().read(off, get, buf); |
82dcae9d ILT |
383 | contents->append(reinterpret_cast<char*>(&buf[0]), get); |
384 | off += get; | |
dbe717ef | 385 | } |
dbe717ef ILT |
386 | } |
387 | ||
388 | // Return whether C can be the start of a name, if the next character | |
389 | // is C2. A name can being with a letter, underscore, period, or | |
390 | // dollar sign. Because a name can be a file name, we also permit | |
391 | // forward slash, backslash, and tilde. Tilde is the tricky case | |
392 | // here; GNU ld also uses it as a bitwise not operator. It is only | |
393 | // recognized as the operator if it is not immediately followed by | |
e5756efb ILT |
394 | // some character which can appear in a symbol. That is, when we |
395 | // don't know that we are looking at an expression, "~0" is a file | |
396 | // name, and "~ 0" is an expression using bitwise not. We are | |
dbe717ef ILT |
397 | // compatible. |
398 | ||
399 | inline bool | |
400 | Lex::can_start_name(char c, char c2) | |
401 | { | |
402 | switch (c) | |
403 | { | |
404 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': | |
405 | case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': | |
406 | case 'M': case 'N': case 'O': case 'Q': case 'P': case 'R': | |
407 | case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': | |
408 | case 'Y': case 'Z': | |
409 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': | |
410 | case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': | |
411 | case 'm': case 'n': case 'o': case 'q': case 'p': case 'r': | |
412 | case 's': case 't': case 'u': case 'v': case 'w': case 'x': | |
413 | case 'y': case 'z': | |
e5756efb | 414 | case '_': case '.': case '$': |
dbe717ef ILT |
415 | return true; |
416 | ||
e5756efb ILT |
417 | case '/': case '\\': |
418 | return this->mode_ == LINKER_SCRIPT; | |
419 | ||
dbe717ef | 420 | case '~': |
09124467 ILT |
421 | return this->mode_ == LINKER_SCRIPT && can_continue_name(&c2); |
422 | ||
c82fbeee | 423 | case '*': case '[': |
3802b2dd | 424 | return (this->mode_ == VERSION_SCRIPT |
c82fbeee | 425 | || this->mode_ == DYNAMIC_LIST |
3802b2dd ILT |
426 | || (this->mode_ == LINKER_SCRIPT |
427 | && can_continue_name(&c2))); | |
dbe717ef ILT |
428 | |
429 | default: | |
430 | return false; | |
431 | } | |
432 | } | |
433 | ||
434 | // Return whether C can continue a name which has already started. | |
435 | // Subsequent characters in a name are the same as the leading | |
436 | // characters, plus digits and "=+-:[],?*". So in general the linker | |
e5756efb ILT |
437 | // script language requires spaces around operators, unless we know |
438 | // that we are parsing an expression. | |
dbe717ef | 439 | |
09124467 ILT |
440 | inline const char* |
441 | Lex::can_continue_name(const char* c) | |
dbe717ef | 442 | { |
09124467 | 443 | switch (*c) |
dbe717ef ILT |
444 | { |
445 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': | |
446 | case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': | |
447 | case 'M': case 'N': case 'O': case 'Q': case 'P': case 'R': | |
448 | case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': | |
449 | case 'Y': case 'Z': | |
450 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': | |
451 | case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': | |
452 | case 'm': case 'n': case 'o': case 'q': case 'p': case 'r': | |
453 | case 's': case 't': case 'u': case 'v': case 'w': case 'x': | |
454 | case 'y': case 'z': | |
e5756efb | 455 | case '_': case '.': case '$': |
dbe717ef ILT |
456 | case '0': case '1': case '2': case '3': case '4': |
457 | case '5': case '6': case '7': case '8': case '9': | |
09124467 | 458 | return c + 1; |
dbe717ef | 459 | |
c82fbeee | 460 | // TODO(csilvers): why not allow ~ in names for version-scripts? |
e5756efb | 461 | case '/': case '\\': case '~': |
09124467 | 462 | case '=': case '+': |
afe47622 | 463 | case ',': |
09124467 ILT |
464 | if (this->mode_ == LINKER_SCRIPT) |
465 | return c + 1; | |
466 | return NULL; | |
467 | ||
afe47622 | 468 | case '[': case ']': case '*': case '?': case '-': |
c82fbeee CS |
469 | if (this->mode_ == LINKER_SCRIPT || this->mode_ == VERSION_SCRIPT |
470 | || this->mode_ == DYNAMIC_LIST) | |
09124467 ILT |
471 | return c + 1; |
472 | return NULL; | |
473 | ||
c82fbeee | 474 | // TODO(csilvers): why allow this? ^ is meaningless in version scripts. |
09124467 | 475 | case '^': |
c82fbeee | 476 | if (this->mode_ == VERSION_SCRIPT || this->mode_ == DYNAMIC_LIST) |
09124467 ILT |
477 | return c + 1; |
478 | return NULL; | |
479 | ||
480 | case ':': | |
481 | if (this->mode_ == LINKER_SCRIPT) | |
482 | return c + 1; | |
c82fbeee CS |
483 | else if ((this->mode_ == VERSION_SCRIPT || this->mode_ == DYNAMIC_LIST) |
484 | && (c[1] == ':')) | |
09124467 ILT |
485 | { |
486 | // A name can have '::' in it, as that's a c++ namespace | |
487 | // separator. But a single colon is not part of a name. | |
488 | return c + 2; | |
489 | } | |
490 | return NULL; | |
e5756efb | 491 | |
dbe717ef | 492 | default: |
09124467 | 493 | return NULL; |
dbe717ef ILT |
494 | } |
495 | } | |
496 | ||
497 | // For a number we accept 0x followed by hex digits, or any sequence | |
498 | // of digits. The old linker accepts leading '$' for hex, and | |
499 | // trailing HXBOD. Those are for MRI compatibility and we don't | |
37e41b03 | 500 | // accept them. |
dbe717ef ILT |
501 | |
502 | // Return whether C1 C2 C3 can start a hex number. | |
503 | ||
504 | inline bool | |
505 | Lex::can_start_hex(char c1, char c2, char c3) | |
506 | { | |
507 | if (c1 == '0' && (c2 == 'x' || c2 == 'X')) | |
09124467 | 508 | return this->can_continue_hex(&c3); |
dbe717ef ILT |
509 | return false; |
510 | } | |
511 | ||
512 | // Return whether C can appear in a hex number. | |
513 | ||
09124467 ILT |
514 | inline const char* |
515 | Lex::can_continue_hex(const char* c) | |
dbe717ef | 516 | { |
09124467 | 517 | switch (*c) |
dbe717ef ILT |
518 | { |
519 | case '0': case '1': case '2': case '3': case '4': | |
520 | case '5': case '6': case '7': case '8': case '9': | |
521 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': | |
522 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': | |
09124467 | 523 | return c + 1; |
dbe717ef ILT |
524 | |
525 | default: | |
09124467 | 526 | return NULL; |
dbe717ef ILT |
527 | } |
528 | } | |
529 | ||
530 | // Return whether C can start a non-hex number. | |
531 | ||
532 | inline bool | |
533 | Lex::can_start_number(char c) | |
534 | { | |
535 | switch (c) | |
536 | { | |
537 | case '0': case '1': case '2': case '3': case '4': | |
538 | case '5': case '6': case '7': case '8': case '9': | |
539 | return true; | |
540 | ||
541 | default: | |
542 | return false; | |
543 | } | |
544 | } | |
545 | ||
546 | // If C1 C2 C3 form a valid three character operator, return the | |
547 | // opcode (defined in the yyscript.h file generated from yyscript.y). | |
548 | // Otherwise return 0. | |
549 | ||
550 | inline int | |
551 | Lex::three_char_operator(char c1, char c2, char c3) | |
552 | { | |
553 | switch (c1) | |
554 | { | |
555 | case '<': | |
556 | if (c2 == '<' && c3 == '=') | |
557 | return LSHIFTEQ; | |
558 | break; | |
559 | case '>': | |
560 | if (c2 == '>' && c3 == '=') | |
561 | return RSHIFTEQ; | |
562 | break; | |
563 | default: | |
564 | break; | |
565 | } | |
566 | return 0; | |
567 | } | |
568 | ||
569 | // If C1 C2 form a valid two character operator, return the opcode | |
570 | // (defined in the yyscript.h file generated from yyscript.y). | |
571 | // Otherwise return 0. | |
572 | ||
573 | inline int | |
574 | Lex::two_char_operator(char c1, char c2) | |
575 | { | |
576 | switch (c1) | |
577 | { | |
578 | case '=': | |
579 | if (c2 == '=') | |
580 | return EQ; | |
581 | break; | |
582 | case '!': | |
583 | if (c2 == '=') | |
584 | return NE; | |
585 | break; | |
586 | case '+': | |
587 | if (c2 == '=') | |
588 | return PLUSEQ; | |
589 | break; | |
590 | case '-': | |
591 | if (c2 == '=') | |
592 | return MINUSEQ; | |
593 | break; | |
594 | case '*': | |
595 | if (c2 == '=') | |
596 | return MULTEQ; | |
597 | break; | |
598 | case '/': | |
599 | if (c2 == '=') | |
600 | return DIVEQ; | |
601 | break; | |
602 | case '|': | |
603 | if (c2 == '=') | |
604 | return OREQ; | |
605 | if (c2 == '|') | |
606 | return OROR; | |
607 | break; | |
608 | case '&': | |
609 | if (c2 == '=') | |
610 | return ANDEQ; | |
611 | if (c2 == '&') | |
612 | return ANDAND; | |
613 | break; | |
614 | case '>': | |
615 | if (c2 == '=') | |
616 | return GE; | |
617 | if (c2 == '>') | |
618 | return RSHIFT; | |
619 | break; | |
620 | case '<': | |
621 | if (c2 == '=') | |
622 | return LE; | |
623 | if (c2 == '<') | |
624 | return LSHIFT; | |
625 | break; | |
626 | default: | |
627 | break; | |
628 | } | |
629 | return 0; | |
630 | } | |
631 | ||
632 | // If C1 is a valid operator, return the opcode. Otherwise return 0. | |
633 | ||
634 | inline int | |
635 | Lex::one_char_operator(char c1) | |
636 | { | |
637 | switch (c1) | |
638 | { | |
639 | case '+': | |
640 | case '-': | |
641 | case '*': | |
642 | case '/': | |
643 | case '%': | |
644 | case '!': | |
645 | case '&': | |
646 | case '|': | |
647 | case '^': | |
648 | case '~': | |
649 | case '<': | |
650 | case '>': | |
651 | case '=': | |
652 | case '?': | |
653 | case ',': | |
654 | case '(': | |
655 | case ')': | |
656 | case '{': | |
657 | case '}': | |
658 | case '[': | |
659 | case ']': | |
660 | case ':': | |
661 | case ';': | |
662 | return c1; | |
663 | default: | |
664 | return 0; | |
665 | } | |
666 | } | |
667 | ||
668 | // Skip a C style comment. *PP points to just after the "/*". Return | |
669 | // false if the comment did not end. | |
670 | ||
671 | bool | |
672 | Lex::skip_c_comment(const char** pp) | |
673 | { | |
674 | const char* p = *pp; | |
675 | while (p[0] != '*' || p[1] != '/') | |
676 | { | |
677 | if (*p == '\0') | |
678 | { | |
679 | *pp = p; | |
680 | return false; | |
681 | } | |
682 | ||
683 | if (*p == '\n') | |
684 | { | |
685 | ++this->lineno_; | |
686 | this->linestart_ = p + 1; | |
687 | } | |
688 | ++p; | |
689 | } | |
690 | ||
691 | *pp = p + 2; | |
692 | return true; | |
693 | } | |
694 | ||
695 | // Skip a line # comment. Return false if there was no newline. | |
696 | ||
697 | bool | |
698 | Lex::skip_line_comment(const char** pp) | |
699 | { | |
700 | const char* p = *pp; | |
701 | size_t skip = strcspn(p, "\n"); | |
702 | if (p[skip] == '\0') | |
703 | { | |
704 | *pp = p + skip; | |
705 | return false; | |
706 | } | |
707 | ||
708 | p += skip + 1; | |
709 | ++this->lineno_; | |
710 | this->linestart_ = p; | |
711 | *pp = p; | |
712 | ||
713 | return true; | |
714 | } | |
715 | ||
716 | // Build a token CLASSIFICATION from all characters that match | |
717 | // CAN_CONTINUE_FN. Update *PP. | |
718 | ||
719 | inline Token | |
720 | Lex::gather_token(Token::Classification classification, | |
09124467 | 721 | const char* (Lex::*can_continue_fn)(const char*), |
dbe717ef ILT |
722 | const char* start, |
723 | const char* match, | |
ca09d69a | 724 | const char** pp) |
dbe717ef | 725 | { |
09124467 | 726 | const char* new_match = NULL; |
37e41b03 | 727 | while ((new_match = (this->*can_continue_fn)(match)) != NULL) |
09124467 | 728 | match = new_match; |
37e41b03 ILT |
729 | |
730 | // A special case: integers may be followed by a single M or K, | |
731 | // case-insensitive. | |
732 | if (classification == Token::TOKEN_INTEGER | |
733 | && (*match == 'm' || *match == 'M' || *match == 'k' || *match == 'K')) | |
734 | ++match; | |
735 | ||
dbe717ef | 736 | *pp = match; |
e5756efb | 737 | return this->make_token(classification, start, match - start, start); |
dbe717ef ILT |
738 | } |
739 | ||
740 | // Build a token from a quoted string. | |
741 | ||
742 | Token | |
743 | Lex::gather_quoted_string(const char** pp) | |
744 | { | |
745 | const char* start = *pp; | |
746 | const char* p = start; | |
747 | ++p; | |
748 | size_t skip = strcspn(p, "\"\n"); | |
749 | if (p[skip] != '"') | |
750 | return this->make_invalid_token(start); | |
751 | *pp = p + skip + 1; | |
e5756efb | 752 | return this->make_token(Token::TOKEN_QUOTED_STRING, p, skip, start); |
dbe717ef ILT |
753 | } |
754 | ||
755 | // Return the next token at *PP. Update *PP. General guideline: we | |
756 | // require linker scripts to be simple ASCII. No unicode linker | |
757 | // scripts. In particular we can assume that any '\0' is the end of | |
758 | // the input. | |
759 | ||
760 | Token | |
761 | Lex::get_token(const char** pp) | |
762 | { | |
763 | const char* p = *pp; | |
764 | ||
765 | while (true) | |
766 | { | |
767 | if (*p == '\0') | |
768 | { | |
769 | *pp = p; | |
770 | return this->make_eof_token(p); | |
771 | } | |
772 | ||
773 | // Skip whitespace quickly. | |
f3048a1d | 774 | while (*p == ' ' || *p == '\t' || *p == '\r') |
dbe717ef ILT |
775 | ++p; |
776 | ||
777 | if (*p == '\n') | |
778 | { | |
779 | ++p; | |
780 | ++this->lineno_; | |
781 | this->linestart_ = p; | |
782 | continue; | |
783 | } | |
784 | ||
785 | // Skip C style comments. | |
786 | if (p[0] == '/' && p[1] == '*') | |
787 | { | |
788 | int lineno = this->lineno_; | |
789 | int charpos = p - this->linestart_ + 1; | |
790 | ||
791 | *pp = p + 2; | |
792 | if (!this->skip_c_comment(pp)) | |
793 | return Token(Token::TOKEN_INVALID, lineno, charpos); | |
794 | p = *pp; | |
795 | ||
796 | continue; | |
797 | } | |
798 | ||
799 | // Skip line comments. | |
800 | if (*p == '#') | |
801 | { | |
802 | *pp = p + 1; | |
803 | if (!this->skip_line_comment(pp)) | |
804 | return this->make_eof_token(p); | |
805 | p = *pp; | |
806 | continue; | |
807 | } | |
808 | ||
809 | // Check for a name. | |
e5756efb | 810 | if (this->can_start_name(p[0], p[1])) |
dbe717ef | 811 | return this->gather_token(Token::TOKEN_STRING, |
e5756efb ILT |
812 | &Lex::can_continue_name, |
813 | p, p + 1, pp); | |
dbe717ef ILT |
814 | |
815 | // We accept any arbitrary name in double quotes, as long as it | |
816 | // does not cross a line boundary. | |
817 | if (*p == '"') | |
818 | { | |
819 | *pp = p; | |
820 | return this->gather_quoted_string(pp); | |
821 | } | |
822 | ||
823 | // Check for a number. | |
824 | ||
e5756efb | 825 | if (this->can_start_hex(p[0], p[1], p[2])) |
dbe717ef | 826 | return this->gather_token(Token::TOKEN_INTEGER, |
e5756efb | 827 | &Lex::can_continue_hex, |
dbe717ef ILT |
828 | p, p + 3, pp); |
829 | ||
830 | if (Lex::can_start_number(p[0])) | |
831 | return this->gather_token(Token::TOKEN_INTEGER, | |
e5756efb | 832 | &Lex::can_continue_number, |
dbe717ef ILT |
833 | p, p + 1, pp); |
834 | ||
835 | // Check for operators. | |
836 | ||
837 | int opcode = Lex::three_char_operator(p[0], p[1], p[2]); | |
838 | if (opcode != 0) | |
839 | { | |
840 | *pp = p + 3; | |
841 | return this->make_token(opcode, p); | |
842 | } | |
843 | ||
844 | opcode = Lex::two_char_operator(p[0], p[1]); | |
845 | if (opcode != 0) | |
846 | { | |
847 | *pp = p + 2; | |
848 | return this->make_token(opcode, p); | |
849 | } | |
850 | ||
851 | opcode = Lex::one_char_operator(p[0]); | |
852 | if (opcode != 0) | |
853 | { | |
854 | *pp = p + 1; | |
855 | return this->make_token(opcode, p); | |
856 | } | |
857 | ||
858 | return this->make_token(Token::TOKEN_INVALID, p); | |
859 | } | |
860 | } | |
861 | ||
e5756efb | 862 | // Return the next token. |
dbe717ef | 863 | |
e5756efb ILT |
864 | const Token* |
865 | Lex::next_token() | |
dbe717ef | 866 | { |
e5756efb ILT |
867 | // The first token is special. |
868 | if (this->first_token_ != 0) | |
dbe717ef | 869 | { |
e5756efb ILT |
870 | this->token_ = Token(this->first_token_, 0, 0); |
871 | this->first_token_ = 0; | |
872 | return &this->token_; | |
873 | } | |
dbe717ef | 874 | |
e5756efb | 875 | this->token_ = this->get_token(&this->current_); |
dbe717ef | 876 | |
e5756efb ILT |
877 | // Don't let an early null byte fool us into thinking that we've |
878 | // reached the end of the file. | |
879 | if (this->token_.is_eof() | |
880 | && (static_cast<size_t>(this->current_ - this->input_string_) | |
881 | < this->input_length_)) | |
882 | this->token_ = this->make_invalid_token(this->current_); | |
dbe717ef | 883 | |
e5756efb | 884 | return &this->token_; |
dbe717ef ILT |
885 | } |
886 | ||
494e05f4 | 887 | // class Symbol_assignment. |
e5756efb | 888 | |
494e05f4 ILT |
889 | // Add the symbol to the symbol table. This makes sure the symbol is |
890 | // there and defined. The actual value is stored later. We can't | |
891 | // determine the actual value at this point, because we can't | |
892 | // necessarily evaluate the expression until all ordinary symbols have | |
893 | // been finalized. | |
e5756efb | 894 | |
caa9d5d9 ILT |
895 | // The GNU linker lets symbol assignments in the linker script |
896 | // silently override defined symbols in object files. We are | |
897 | // compatible. FIXME: Should we issue a warning? | |
898 | ||
e5756efb | 899 | void |
9b07f471 | 900 | Symbol_assignment::add_to_table(Symbol_table* symtab) |
e5756efb | 901 | { |
494e05f4 | 902 | elfcpp::STV vis = this->hidden_ ? elfcpp::STV_HIDDEN : elfcpp::STV_DEFAULT; |
9b07f471 | 903 | this->sym_ = symtab->define_as_constant(this->name_.c_str(), |
e5756efb | 904 | NULL, // version |
99fff23b ILT |
905 | (this->is_defsym_ |
906 | ? Symbol_table::DEFSYM | |
907 | : Symbol_table::SCRIPT), | |
e5756efb ILT |
908 | 0, // value |
909 | 0, // size | |
910 | elfcpp::STT_NOTYPE, | |
911 | elfcpp::STB_GLOBAL, | |
912 | vis, | |
913 | 0, // nonvis | |
caa9d5d9 ILT |
914 | this->provide_, |
915 | true); // force_override | |
e5756efb ILT |
916 | } |
917 | ||
494e05f4 | 918 | // Finalize a symbol value. |
e5756efb ILT |
919 | |
920 | void | |
494e05f4 | 921 | Symbol_assignment::finalize(Symbol_table* symtab, const Layout* layout) |
a445fddf | 922 | { |
77e65537 | 923 | this->finalize_maybe_dot(symtab, layout, false, 0, NULL); |
a445fddf ILT |
924 | } |
925 | ||
926 | // Finalize a symbol value which can refer to the dot symbol. | |
927 | ||
928 | void | |
929 | Symbol_assignment::finalize_with_dot(Symbol_table* symtab, | |
930 | const Layout* layout, | |
77e65537 ILT |
931 | uint64_t dot_value, |
932 | Output_section* dot_section) | |
a445fddf | 933 | { |
77e65537 | 934 | this->finalize_maybe_dot(symtab, layout, true, dot_value, dot_section); |
a445fddf ILT |
935 | } |
936 | ||
937 | // Finalize a symbol value, internal version. | |
938 | ||
939 | void | |
940 | Symbol_assignment::finalize_maybe_dot(Symbol_table* symtab, | |
941 | const Layout* layout, | |
942 | bool is_dot_available, | |
77e65537 ILT |
943 | uint64_t dot_value, |
944 | Output_section* dot_section) | |
e5756efb | 945 | { |
494e05f4 ILT |
946 | // If we were only supposed to provide this symbol, the sym_ field |
947 | // will be NULL if the symbol was not referenced. | |
948 | if (this->sym_ == NULL) | |
949 | { | |
950 | gold_assert(this->provide_); | |
951 | return; | |
952 | } | |
953 | ||
8851ecca | 954 | if (parameters->target().get_size() == 32) |
e5756efb ILT |
955 | { |
956 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
77e65537 ILT |
957 | this->sized_finalize<32>(symtab, layout, is_dot_available, dot_value, |
958 | dot_section); | |
e5756efb ILT |
959 | #else |
960 | gold_unreachable(); | |
961 | #endif | |
962 | } | |
8851ecca | 963 | else if (parameters->target().get_size() == 64) |
e5756efb ILT |
964 | { |
965 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
77e65537 ILT |
966 | this->sized_finalize<64>(symtab, layout, is_dot_available, dot_value, |
967 | dot_section); | |
e5756efb ILT |
968 | #else |
969 | gold_unreachable(); | |
970 | #endif | |
971 | } | |
972 | else | |
973 | gold_unreachable(); | |
974 | } | |
975 | ||
976 | template<int size> | |
977 | void | |
a445fddf | 978 | Symbol_assignment::sized_finalize(Symbol_table* symtab, const Layout* layout, |
77e65537 ILT |
979 | bool is_dot_available, uint64_t dot_value, |
980 | Output_section* dot_section) | |
a445fddf | 981 | { |
77e65537 | 982 | Output_section* section; |
e051745c CC |
983 | elfcpp::STT type = elfcpp::STT_NOTYPE; |
984 | elfcpp::STV vis = elfcpp::STV_DEFAULT; | |
985 | unsigned char nonvis = 0; | |
919ed24c | 986 | uint64_t final_val = this->val_->eval_maybe_dot(symtab, layout, true, |
a445fddf | 987 | is_dot_available, |
77e65537 | 988 | dot_value, dot_section, |
e051745c CC |
989 | §ion, NULL, &type, |
990 | &vis, &nonvis, false); | |
494e05f4 | 991 | Sized_symbol<size>* ssym = symtab->get_sized_symbol<size>(this->sym_); |
a445fddf | 992 | ssym->set_value(final_val); |
e051745c CC |
993 | ssym->set_type(type); |
994 | ssym->set_visibility(vis); | |
995 | ssym->set_nonvis(nonvis); | |
77e65537 ILT |
996 | if (section != NULL) |
997 | ssym->set_output_section(section); | |
a445fddf ILT |
998 | } |
999 | ||
286adcf4 CC |
1000 | // Set the symbol value if the expression yields an absolute value or |
1001 | // a value relative to DOT_SECTION. | |
a445fddf ILT |
1002 | |
1003 | void | |
1004 | Symbol_assignment::set_if_absolute(Symbol_table* symtab, const Layout* layout, | |
286adcf4 CC |
1005 | bool is_dot_available, uint64_t dot_value, |
1006 | Output_section* dot_section) | |
a445fddf ILT |
1007 | { |
1008 | if (this->sym_ == NULL) | |
1009 | return; | |
1010 | ||
77e65537 | 1011 | Output_section* val_section; |
919ed24c ILT |
1012 | uint64_t val = this->val_->eval_maybe_dot(symtab, layout, false, |
1013 | is_dot_available, dot_value, | |
286adcf4 | 1014 | dot_section, &val_section, NULL, |
e051745c | 1015 | NULL, NULL, NULL, false); |
286adcf4 | 1016 | if (val_section != NULL && val_section != dot_section) |
a445fddf ILT |
1017 | return; |
1018 | ||
8851ecca | 1019 | if (parameters->target().get_size() == 32) |
a445fddf ILT |
1020 | { |
1021 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
1022 | Sized_symbol<32>* ssym = symtab->get_sized_symbol<32>(this->sym_); | |
1023 | ssym->set_value(val); | |
1024 | #else | |
1025 | gold_unreachable(); | |
1026 | #endif | |
1027 | } | |
8851ecca | 1028 | else if (parameters->target().get_size() == 64) |
a445fddf ILT |
1029 | { |
1030 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
1031 | Sized_symbol<64>* ssym = symtab->get_sized_symbol<64>(this->sym_); | |
1032 | ssym->set_value(val); | |
1033 | #else | |
1034 | gold_unreachable(); | |
1035 | #endif | |
1036 | } | |
1037 | else | |
1038 | gold_unreachable(); | |
286adcf4 CC |
1039 | if (val_section != NULL) |
1040 | this->sym_->set_output_section(val_section); | |
494e05f4 ILT |
1041 | } |
1042 | ||
1043 | // Print for debugging. | |
1044 | ||
1045 | void | |
1046 | Symbol_assignment::print(FILE* f) const | |
1047 | { | |
1048 | if (this->provide_ && this->hidden_) | |
1049 | fprintf(f, "PROVIDE_HIDDEN("); | |
1050 | else if (this->provide_) | |
1051 | fprintf(f, "PROVIDE("); | |
1052 | else if (this->hidden_) | |
1053 | gold_unreachable(); | |
1054 | ||
1055 | fprintf(f, "%s = ", this->name_.c_str()); | |
1056 | this->val_->print(f); | |
1057 | ||
1058 | if (this->provide_ || this->hidden_) | |
1059 | fprintf(f, ")"); | |
1060 | ||
1061 | fprintf(f, "\n"); | |
1062 | } | |
1063 | ||
1064 | // Class Script_assertion. | |
1065 | ||
1066 | // Check the assertion. | |
1067 | ||
1068 | void | |
1069 | Script_assertion::check(const Symbol_table* symtab, const Layout* layout) | |
1070 | { | |
919ed24c | 1071 | if (!this->check_->eval(symtab, layout, true)) |
494e05f4 ILT |
1072 | gold_error("%s", this->message_.c_str()); |
1073 | } | |
1074 | ||
1075 | // Print for debugging. | |
1076 | ||
1077 | void | |
1078 | Script_assertion::print(FILE* f) const | |
1079 | { | |
1080 | fprintf(f, "ASSERT("); | |
1081 | this->check_->print(f); | |
1082 | fprintf(f, ", \"%s\")\n", this->message_.c_str()); | |
1083 | } | |
1084 | ||
1085 | // Class Script_options. | |
1086 | ||
1087 | Script_options::Script_options() | |
88a4108b ILT |
1088 | : entry_(), symbol_assignments_(), symbol_definitions_(), |
1089 | symbol_references_(), version_script_info_(), script_sections_() | |
494e05f4 ILT |
1090 | { |
1091 | } | |
1092 | ||
e597fa08 NC |
1093 | // Returns true if NAME is on the list of symbol assignments waiting |
1094 | // to be processed. | |
1095 | ||
1096 | bool | |
1097 | Script_options::is_pending_assignment(const char* name) | |
1098 | { | |
1099 | for (Symbol_assignments::iterator p = this->symbol_assignments_.begin(); | |
1100 | p != this->symbol_assignments_.end(); | |
1101 | ++p) | |
1102 | if ((*p)->name() == name) | |
1103 | return true; | |
1104 | return false; | |
1105 | } | |
1106 | ||
494e05f4 ILT |
1107 | // Add a symbol to be defined. |
1108 | ||
1109 | void | |
1110 | Script_options::add_symbol_assignment(const char* name, size_t length, | |
99fff23b ILT |
1111 | bool is_defsym, Expression* value, |
1112 | bool provide, bool hidden) | |
494e05f4 | 1113 | { |
a445fddf ILT |
1114 | if (length != 1 || name[0] != '.') |
1115 | { | |
1116 | if (this->script_sections_.in_sections_clause()) | |
a445fddf | 1117 | { |
99fff23b ILT |
1118 | gold_assert(!is_defsym); |
1119 | this->script_sections_.add_symbol_assignment(name, length, value, | |
a445fddf | 1120 | provide, hidden); |
99fff23b ILT |
1121 | } |
1122 | else | |
1123 | { | |
1124 | Symbol_assignment* p = new Symbol_assignment(name, length, is_defsym, | |
1125 | value, provide, hidden); | |
a445fddf ILT |
1126 | this->symbol_assignments_.push_back(p); |
1127 | } | |
88a4108b ILT |
1128 | |
1129 | if (!provide) | |
1130 | { | |
1131 | std::string n(name, length); | |
1132 | this->symbol_definitions_.insert(n); | |
1133 | this->symbol_references_.erase(n); | |
1134 | } | |
a445fddf | 1135 | } |
494e05f4 ILT |
1136 | else |
1137 | { | |
a445fddf ILT |
1138 | if (provide || hidden) |
1139 | gold_error(_("invalid use of PROVIDE for dot symbol")); | |
12edd763 ILT |
1140 | |
1141 | // The GNU linker permits assignments to dot outside of SECTIONS | |
1142 | // clauses and treats them as occurring inside, so we don't | |
1143 | // check in_sections_clause here. | |
1144 | this->script_sections_.add_dot_assignment(value); | |
494e05f4 ILT |
1145 | } |
1146 | } | |
1147 | ||
88a4108b ILT |
1148 | // Add a reference to a symbol. |
1149 | ||
1150 | void | |
1151 | Script_options::add_symbol_reference(const char* name, size_t length) | |
1152 | { | |
1153 | if (length != 1 || name[0] != '.') | |
1154 | { | |
1155 | std::string n(name, length); | |
1156 | if (this->symbol_definitions_.find(n) == this->symbol_definitions_.end()) | |
1157 | this->symbol_references_.insert(n); | |
1158 | } | |
1159 | } | |
1160 | ||
494e05f4 ILT |
1161 | // Add an assertion. |
1162 | ||
1163 | void | |
1164 | Script_options::add_assertion(Expression* check, const char* message, | |
1165 | size_t messagelen) | |
1166 | { | |
1167 | if (this->script_sections_.in_sections_clause()) | |
1168 | this->script_sections_.add_assertion(check, message, messagelen); | |
1169 | else | |
1170 | { | |
1171 | Script_assertion* p = new Script_assertion(check, message, messagelen); | |
1172 | this->assertions_.push_back(p); | |
1173 | } | |
1174 | } | |
1175 | ||
919ed24c ILT |
1176 | // Create sections required by any linker scripts. |
1177 | ||
1178 | void | |
1179 | Script_options::create_script_sections(Layout* layout) | |
1180 | { | |
1181 | if (this->saw_sections_clause()) | |
1182 | this->script_sections_.create_sections(layout); | |
1183 | } | |
1184 | ||
494e05f4 ILT |
1185 | // Add any symbols we are defining to the symbol table. |
1186 | ||
1187 | void | |
9b07f471 | 1188 | Script_options::add_symbols_to_table(Symbol_table* symtab) |
e5756efb ILT |
1189 | { |
1190 | for (Symbol_assignments::iterator p = this->symbol_assignments_.begin(); | |
1191 | p != this->symbol_assignments_.end(); | |
1192 | ++p) | |
9b07f471 | 1193 | (*p)->add_to_table(symtab); |
a445fddf | 1194 | this->script_sections_.add_symbols_to_table(symtab); |
494e05f4 ILT |
1195 | } |
1196 | ||
a445fddf | 1197 | // Finalize symbol values. Also check assertions. |
494e05f4 ILT |
1198 | |
1199 | void | |
1200 | Script_options::finalize_symbols(Symbol_table* symtab, const Layout* layout) | |
1201 | { | |
7c07ecec ILT |
1202 | // We finalize the symbols defined in SECTIONS first, because they |
1203 | // are the ones which may have changed. This way if symbol outside | |
1204 | // SECTIONS are defined in terms of symbols inside SECTIONS, they | |
1205 | // will get the right value. | |
1206 | this->script_sections_.finalize_symbols(symtab, layout); | |
1207 | ||
494e05f4 ILT |
1208 | for (Symbol_assignments::iterator p = this->symbol_assignments_.begin(); |
1209 | p != this->symbol_assignments_.end(); | |
1210 | ++p) | |
1211 | (*p)->finalize(symtab, layout); | |
a445fddf ILT |
1212 | |
1213 | for (Assertions::iterator p = this->assertions_.begin(); | |
1214 | p != this->assertions_.end(); | |
1215 | ++p) | |
1216 | (*p)->check(symtab, layout); | |
a445fddf ILT |
1217 | } |
1218 | ||
1219 | // Set section addresses. We set all the symbols which have absolute | |
1220 | // values. Then we let the SECTIONS clause do its thing. This | |
1221 | // returns the segment which holds the file header and segment | |
1222 | // headers, if any. | |
1223 | ||
1224 | Output_segment* | |
1225 | Script_options::set_section_addresses(Symbol_table* symtab, Layout* layout) | |
1226 | { | |
1227 | for (Symbol_assignments::iterator p = this->symbol_assignments_.begin(); | |
1228 | p != this->symbol_assignments_.end(); | |
1229 | ++p) | |
286adcf4 | 1230 | (*p)->set_if_absolute(symtab, layout, false, 0, NULL); |
a445fddf ILT |
1231 | |
1232 | return this->script_sections_.set_section_addresses(symtab, layout); | |
e5756efb ILT |
1233 | } |
1234 | ||
dbe717ef ILT |
1235 | // This class holds data passed through the parser to the lexer and to |
1236 | // the parser support functions. This avoids global variables. We | |
17a1d0a9 ILT |
1237 | // can't use global variables because we need not be called by a |
1238 | // singleton thread. | |
dbe717ef ILT |
1239 | |
1240 | class Parser_closure | |
1241 | { | |
1242 | public: | |
2ea97941 | 1243 | Parser_closure(const char* filename, |
dbe717ef | 1244 | const Position_dependent_options& posdep_options, |
99fff23b | 1245 | bool parsing_defsym, bool in_group, bool is_in_sysroot, |
2ea97941 ILT |
1246 | Command_line* command_line, |
1247 | Script_options* script_options, | |
15f8229b | 1248 | Lex* lex, |
c7975edd CC |
1249 | bool skip_on_incompatible_target, |
1250 | Script_info* script_info) | |
2ea97941 | 1251 | : filename_(filename), posdep_options_(posdep_options), |
99fff23b ILT |
1252 | parsing_defsym_(parsing_defsym), in_group_(in_group), |
1253 | is_in_sysroot_(is_in_sysroot), | |
2ea97941 | 1254 | skip_on_incompatible_target_(skip_on_incompatible_target), |
15f8229b | 1255 | found_incompatible_target_(false), |
2ea97941 ILT |
1256 | command_line_(command_line), script_options_(script_options), |
1257 | version_script_info_(script_options->version_script_info()), | |
c7975edd CC |
1258 | lex_(lex), lineno_(0), charpos_(0), lex_mode_stack_(), inputs_(NULL), |
1259 | script_info_(script_info) | |
c82fbeee | 1260 | { |
09124467 | 1261 | // We start out processing C symbols in the default lex mode. |
6affe781 ILT |
1262 | this->language_stack_.push_back(Version_script_info::LANGUAGE_C); |
1263 | this->lex_mode_stack_.push_back(lex->mode()); | |
09124467 | 1264 | } |
dbe717ef ILT |
1265 | |
1266 | // Return the file name. | |
1267 | const char* | |
1268 | filename() const | |
1269 | { return this->filename_; } | |
1270 | ||
1271 | // Return the position dependent options. The caller may modify | |
1272 | // this. | |
1273 | Position_dependent_options& | |
1274 | position_dependent_options() | |
1275 | { return this->posdep_options_; } | |
1276 | ||
99fff23b ILT |
1277 | // Whether we are parsing a --defsym. |
1278 | bool | |
1279 | parsing_defsym() const | |
1280 | { return this->parsing_defsym_; } | |
1281 | ||
dbe717ef ILT |
1282 | // Return whether this script is being run in a group. |
1283 | bool | |
1284 | in_group() const | |
1285 | { return this->in_group_; } | |
1286 | ||
ad2d6943 ILT |
1287 | // Return whether this script was found using a directory in the |
1288 | // sysroot. | |
1289 | bool | |
1290 | is_in_sysroot() const | |
1291 | { return this->is_in_sysroot_; } | |
1292 | ||
15f8229b ILT |
1293 | // Whether to skip to the next file with the same name if we find an |
1294 | // incompatible target in an OUTPUT_FORMAT statement. | |
1295 | bool | |
1296 | skip_on_incompatible_target() const | |
1297 | { return this->skip_on_incompatible_target_; } | |
1298 | ||
e6a307ba | 1299 | // Stop skipping to the next file on an incompatible target. This |
15f8229b ILT |
1300 | // is called when we make some unrevocable change to the data |
1301 | // structures. | |
1302 | void | |
1303 | clear_skip_on_incompatible_target() | |
1304 | { this->skip_on_incompatible_target_ = false; } | |
1305 | ||
1306 | // Whether we found an incompatible target in an OUTPUT_FORMAT | |
1307 | // statement. | |
1308 | bool | |
1309 | found_incompatible_target() const | |
1310 | { return this->found_incompatible_target_; } | |
1311 | ||
1312 | // Note that we found an incompatible target. | |
1313 | void | |
1314 | set_found_incompatible_target() | |
1315 | { this->found_incompatible_target_ = true; } | |
1316 | ||
a0451b38 ILT |
1317 | // Returns the Command_line structure passed in at constructor time. |
1318 | // This value may be NULL. The caller may modify this, which modifies | |
1319 | // the passed-in Command_line object (not a copy). | |
e5756efb ILT |
1320 | Command_line* |
1321 | command_line() | |
a0451b38 ILT |
1322 | { return this->command_line_; } |
1323 | ||
e5756efb ILT |
1324 | // Return the options which may be set by a script. |
1325 | Script_options* | |
1326 | script_options() | |
1327 | { return this->script_options_; } | |
dbe717ef | 1328 | |
09124467 ILT |
1329 | // Return the object in which version script information should be stored. |
1330 | Version_script_info* | |
1331 | version_script() | |
1332 | { return this->version_script_info_; } | |
1333 | ||
2dd3e587 | 1334 | // Return the next token, and advance. |
dbe717ef ILT |
1335 | const Token* |
1336 | next_token() | |
1337 | { | |
e5756efb ILT |
1338 | const Token* token = this->lex_->next_token(); |
1339 | this->lineno_ = token->lineno(); | |
1340 | this->charpos_ = token->charpos(); | |
1341 | return token; | |
dbe717ef ILT |
1342 | } |
1343 | ||
e5756efb ILT |
1344 | // Set a new lexer mode, pushing the current one. |
1345 | void | |
1346 | push_lex_mode(Lex::Mode mode) | |
1347 | { | |
1348 | this->lex_mode_stack_.push_back(this->lex_->mode()); | |
1349 | this->lex_->set_mode(mode); | |
1350 | } | |
1351 | ||
1352 | // Pop the lexer mode. | |
1353 | void | |
1354 | pop_lex_mode() | |
2dd3e587 | 1355 | { |
e5756efb ILT |
1356 | gold_assert(!this->lex_mode_stack_.empty()); |
1357 | this->lex_->set_mode(this->lex_mode_stack_.back()); | |
1358 | this->lex_mode_stack_.pop_back(); | |
2dd3e587 ILT |
1359 | } |
1360 | ||
09124467 ILT |
1361 | // Return the current lexer mode. |
1362 | Lex::Mode | |
1363 | lex_mode() const | |
1364 | { return this->lex_mode_stack_.back(); } | |
1365 | ||
e5756efb ILT |
1366 | // Return the line number of the last token. |
1367 | int | |
1368 | lineno() const | |
1369 | { return this->lineno_; } | |
1370 | ||
1371 | // Return the character position in the line of the last token. | |
1372 | int | |
1373 | charpos() const | |
1374 | { return this->charpos_; } | |
1375 | ||
dbe717ef ILT |
1376 | // Return the list of input files, creating it if necessary. This |
1377 | // is a space leak--we never free the INPUTS_ pointer. | |
1378 | Input_arguments* | |
1379 | inputs() | |
1380 | { | |
1381 | if (this->inputs_ == NULL) | |
1382 | this->inputs_ = new Input_arguments(); | |
1383 | return this->inputs_; | |
1384 | } | |
1385 | ||
1386 | // Return whether we saw any input files. | |
1387 | bool | |
1388 | saw_inputs() const | |
1389 | { return this->inputs_ != NULL && !this->inputs_->empty(); } | |
1390 | ||
09124467 ILT |
1391 | // Return the current language being processed in a version script |
1392 | // (eg, "C++"). The empty string represents unmangled C names. | |
6affe781 | 1393 | Version_script_info::Language |
09124467 ILT |
1394 | get_current_language() const |
1395 | { return this->language_stack_.back(); } | |
1396 | ||
1397 | // Push a language onto the stack when entering an extern block. | |
6affe781 ILT |
1398 | void |
1399 | push_language(Version_script_info::Language lang) | |
09124467 ILT |
1400 | { this->language_stack_.push_back(lang); } |
1401 | ||
1402 | // Pop a language off of the stack when exiting an extern block. | |
6affe781 ILT |
1403 | void |
1404 | pop_language() | |
09124467 ILT |
1405 | { |
1406 | gold_assert(!this->language_stack_.empty()); | |
1407 | this->language_stack_.pop_back(); | |
1408 | } | |
1409 | ||
c7975edd CC |
1410 | // Return a pointer to the incremental info. |
1411 | Script_info* | |
1412 | script_info() | |
1413 | { return this->script_info_; } | |
1414 | ||
dbe717ef ILT |
1415 | private: |
1416 | // The name of the file we are reading. | |
1417 | const char* filename_; | |
1418 | // The position dependent options. | |
1419 | Position_dependent_options posdep_options_; | |
99fff23b ILT |
1420 | // True if we are parsing a --defsym. |
1421 | bool parsing_defsym_; | |
dbe717ef ILT |
1422 | // Whether we are currently in a --start-group/--end-group. |
1423 | bool in_group_; | |
ad2d6943 ILT |
1424 | // Whether the script was found in a sysrooted directory. |
1425 | bool is_in_sysroot_; | |
15f8229b ILT |
1426 | // If this is true, then if we find an OUTPUT_FORMAT with an |
1427 | // incompatible target, then we tell the parser to abort so that we | |
1428 | // can search for the next file with the same name. | |
1429 | bool skip_on_incompatible_target_; | |
1430 | // True if we found an OUTPUT_FORMAT with an incompatible target. | |
1431 | bool found_incompatible_target_; | |
a0451b38 ILT |
1432 | // May be NULL if the user chooses not to pass one in. |
1433 | Command_line* command_line_; | |
e5756efb ILT |
1434 | // Options which may be set from any linker script. |
1435 | Script_options* script_options_; | |
09124467 ILT |
1436 | // Information parsed from a version script. |
1437 | Version_script_info* version_script_info_; | |
e5756efb ILT |
1438 | // The lexer. |
1439 | Lex* lex_; | |
1440 | // The line number of the last token returned by next_token. | |
1441 | int lineno_; | |
1442 | // The column number of the last token returned by next_token. | |
1443 | int charpos_; | |
1444 | // A stack of lexer modes. | |
1445 | std::vector<Lex::Mode> lex_mode_stack_; | |
09124467 ILT |
1446 | // A stack of which extern/language block we're inside. Can be C++, |
1447 | // java, or empty for C. | |
6affe781 | 1448 | std::vector<Version_script_info::Language> language_stack_; |
dbe717ef ILT |
1449 | // New input files found to add to the link. |
1450 | Input_arguments* inputs_; | |
c7975edd CC |
1451 | // Pointer to incremental linking info. |
1452 | Script_info* script_info_; | |
dbe717ef ILT |
1453 | }; |
1454 | ||
1455 | // FILE was found as an argument on the command line. Try to read it | |
da769d56 | 1456 | // as a script. Return true if the file was handled. |
dbe717ef ILT |
1457 | |
1458 | bool | |
f1ed28fb | 1459 | read_input_script(Workqueue* workqueue, Symbol_table* symtab, Layout* layout, |
15f8229b ILT |
1460 | Dirsearch* dirsearch, int dirindex, |
1461 | Input_objects* input_objects, Mapfile* mapfile, | |
1462 | Input_group* input_group, | |
dbe717ef | 1463 | const Input_argument* input_argument, |
da769d56 ILT |
1464 | Input_file* input_file, Task_token* next_blocker, |
1465 | bool* used_next_blocker) | |
dbe717ef | 1466 | { |
da769d56 ILT |
1467 | *used_next_blocker = false; |
1468 | ||
e5756efb ILT |
1469 | std::string input_string; |
1470 | Lex::read_file(input_file, &input_string); | |
1471 | ||
1472 | Lex lex(input_string.c_str(), input_string.length(), PARSING_LINKER_SCRIPT); | |
dbe717ef | 1473 | |
c7975edd CC |
1474 | Script_info* script_info = NULL; |
1475 | if (layout->incremental_inputs() != NULL) | |
1476 | { | |
1477 | const std::string& filename = input_file->filename(); | |
1478 | Timespec mtime = input_file->file().get_mtime(); | |
cdc29364 CC |
1479 | unsigned int arg_serial = input_argument->file().arg_serial(); |
1480 | script_info = new Script_info(filename); | |
1481 | layout->incremental_inputs()->report_script(script_info, arg_serial, | |
1482 | mtime); | |
c7975edd CC |
1483 | } |
1484 | ||
dbe717ef ILT |
1485 | Parser_closure closure(input_file->filename().c_str(), |
1486 | input_argument->file().options(), | |
99fff23b | 1487 | false, |
dbe717ef | 1488 | input_group != NULL, |
ad2d6943 | 1489 | input_file->is_in_sysroot(), |
a0451b38 | 1490 | NULL, |
e5756efb | 1491 | layout->script_options(), |
15f8229b | 1492 | &lex, |
c7975edd CC |
1493 | input_file->will_search_for(), |
1494 | script_info); | |
dbe717ef | 1495 | |
d7bb5745 ILT |
1496 | bool old_saw_sections_clause = |
1497 | layout->script_options()->saw_sections_clause(); | |
1498 | ||
dbe717ef | 1499 | if (yyparse(&closure) != 0) |
15f8229b ILT |
1500 | { |
1501 | if (closure.found_incompatible_target()) | |
1502 | { | |
1503 | Read_symbols::incompatible_warning(input_argument, input_file); | |
1504 | Read_symbols::requeue(workqueue, input_objects, symtab, layout, | |
1505 | dirsearch, dirindex, mapfile, input_argument, | |
1506 | input_group, next_blocker); | |
1507 | return true; | |
1508 | } | |
1509 | return false; | |
1510 | } | |
dbe717ef | 1511 | |
d7bb5745 ILT |
1512 | if (!old_saw_sections_clause |
1513 | && layout->script_options()->saw_sections_clause() | |
1514 | && layout->have_added_input_section()) | |
1515 | gold_error(_("%s: SECTIONS seen after other input files; try -T/--script"), | |
1516 | input_file->filename().c_str()); | |
1517 | ||
dbe717ef | 1518 | if (!closure.saw_inputs()) |
da769d56 | 1519 | return true; |
dbe717ef | 1520 | |
da769d56 | 1521 | Task_token* this_blocker = NULL; |
dbe717ef ILT |
1522 | for (Input_arguments::const_iterator p = closure.inputs()->begin(); |
1523 | p != closure.inputs()->end(); | |
1524 | ++p) | |
1525 | { | |
1526 | Task_token* nb; | |
1527 | if (p + 1 == closure.inputs()->end()) | |
1528 | nb = next_blocker; | |
1529 | else | |
1530 | { | |
17a1d0a9 | 1531 | nb = new Task_token(true); |
dbe717ef ILT |
1532 | nb->add_blocker(); |
1533 | } | |
f1ed28fb | 1534 | workqueue->queue_soon(new Read_symbols(input_objects, symtab, |
15f8229b | 1535 | layout, dirsearch, 0, mapfile, &*p, |
b0193076 | 1536 | input_group, NULL, this_blocker, nb)); |
dbe717ef ILT |
1537 | this_blocker = nb; |
1538 | } | |
1539 | ||
da769d56 ILT |
1540 | *used_next_blocker = true; |
1541 | ||
dbe717ef ILT |
1542 | return true; |
1543 | } | |
1544 | ||
628f39be SA |
1545 | // Helper function for read_version_script(), read_commandline_script() and |
1546 | // script_include_directive(). Processes the given file in the mode indicated | |
1547 | // by first_token and lex_mode. | |
3c2fafa5 | 1548 | |
09124467 ILT |
1549 | static bool |
1550 | read_script_file(const char* filename, Command_line* cmdline, | |
c82fbeee | 1551 | Script_options* script_options, |
09124467 | 1552 | int first_token, Lex::Mode lex_mode) |
3c2fafa5 | 1553 | { |
3c2fafa5 | 1554 | Dirsearch dirsearch; |
628f39be SA |
1555 | std::string name = filename; |
1556 | ||
1557 | // If filename is a relative filename, search for it manually using "." + | |
1558 | // cmdline->options()->library_path() -- not dirsearch. | |
1559 | if (!IS_ABSOLUTE_PATH(filename)) | |
1560 | { | |
1561 | const General_options::Dir_list& search_path = | |
1562 | cmdline->options().library_path(); | |
1563 | name = Dirsearch::find_file_in_dir_list(name, search_path, "."); | |
1564 | } | |
3c2fafa5 | 1565 | |
17a1d0a9 ILT |
1566 | // The file locking code wants to record a Task, but we haven't |
1567 | // started the workqueue yet. This is only for debugging purposes, | |
1568 | // so we invent a fake value. | |
1569 | const Task* task = reinterpret_cast<const Task*>(-1); | |
1570 | ||
b0d8593d ILT |
1571 | // We don't want this file to be opened in binary mode. |
1572 | Position_dependent_options posdep = cmdline->position_dependent_options(); | |
7cc619c3 ILT |
1573 | if (posdep.format_enum() == General_options::OBJECT_FORMAT_BINARY) |
1574 | posdep.set_format_enum(General_options::OBJECT_FORMAT_ELF); | |
628f39be | 1575 | Input_file_argument input_argument(name.c_str(), |
ae3b5189 CD |
1576 | Input_file_argument::INPUT_FILE_TYPE_FILE, |
1577 | "", false, posdep); | |
3c2fafa5 | 1578 | Input_file input_file(&input_argument); |
15f8229b ILT |
1579 | int dummy = 0; |
1580 | if (!input_file.open(dirsearch, task, &dummy)) | |
3c2fafa5 ILT |
1581 | return false; |
1582 | ||
e5756efb ILT |
1583 | std::string input_string; |
1584 | Lex::read_file(&input_file, &input_string); | |
1585 | ||
09124467 ILT |
1586 | Lex lex(input_string.c_str(), input_string.length(), first_token); |
1587 | lex.set_mode(lex_mode); | |
3c2fafa5 ILT |
1588 | |
1589 | Parser_closure closure(filename, | |
1590 | cmdline->position_dependent_options(), | |
99fff23b | 1591 | first_token == Lex::DYNAMIC_LIST, |
3c2fafa5 ILT |
1592 | false, |
1593 | input_file.is_in_sysroot(), | |
a0451b38 | 1594 | cmdline, |
c82fbeee | 1595 | script_options, |
15f8229b | 1596 | &lex, |
c7975edd CC |
1597 | false, |
1598 | NULL); | |
3c2fafa5 ILT |
1599 | if (yyparse(&closure) != 0) |
1600 | { | |
17a1d0a9 | 1601 | input_file.file().unlock(task); |
3c2fafa5 ILT |
1602 | return false; |
1603 | } | |
1604 | ||
17a1d0a9 | 1605 | input_file.file().unlock(task); |
d391083d ILT |
1606 | |
1607 | gold_assert(!closure.saw_inputs()); | |
1608 | ||
3c2fafa5 ILT |
1609 | return true; |
1610 | } | |
1611 | ||
09124467 ILT |
1612 | // FILENAME was found as an argument to --script (-T). |
1613 | // Read it as a script, and execute its contents immediately. | |
1614 | ||
1615 | bool | |
1616 | read_commandline_script(const char* filename, Command_line* cmdline) | |
1617 | { | |
c82fbeee | 1618 | return read_script_file(filename, cmdline, &cmdline->script_options(), |
09124467 ILT |
1619 | PARSING_LINKER_SCRIPT, Lex::LINKER_SCRIPT); |
1620 | } | |
1621 | ||
c82fbeee CS |
1622 | // FILENAME was found as an argument to --version-script. Read it as |
1623 | // a version script, and store its contents in | |
09124467 ILT |
1624 | // cmdline->script_options()->version_script_info(). |
1625 | ||
1626 | bool | |
1627 | read_version_script(const char* filename, Command_line* cmdline) | |
1628 | { | |
c82fbeee | 1629 | return read_script_file(filename, cmdline, &cmdline->script_options(), |
09124467 ILT |
1630 | PARSING_VERSION_SCRIPT, Lex::VERSION_SCRIPT); |
1631 | } | |
1632 | ||
c82fbeee CS |
1633 | // FILENAME was found as an argument to --dynamic-list. Read it as a |
1634 | // list of symbols, and store its contents in DYNAMIC_LIST. | |
1635 | ||
1636 | bool | |
1637 | read_dynamic_list(const char* filename, Command_line* cmdline, | |
1638 | Script_options* dynamic_list) | |
1639 | { | |
1640 | return read_script_file(filename, cmdline, dynamic_list, | |
1641 | PARSING_DYNAMIC_LIST, Lex::DYNAMIC_LIST); | |
1642 | } | |
1643 | ||
e5756efb ILT |
1644 | // Implement the --defsym option on the command line. Return true if |
1645 | // all is well. | |
1646 | ||
1647 | bool | |
1648 | Script_options::define_symbol(const char* definition) | |
1649 | { | |
1650 | Lex lex(definition, strlen(definition), PARSING_DEFSYM); | |
1651 | lex.set_mode(Lex::EXPRESSION); | |
1652 | ||
1653 | // Dummy value. | |
1654 | Position_dependent_options posdep_options; | |
1655 | ||
99fff23b | 1656 | Parser_closure closure("command line", posdep_options, true, |
c7975edd | 1657 | false, false, NULL, this, &lex, false, NULL); |
e5756efb ILT |
1658 | |
1659 | if (yyparse(&closure) != 0) | |
1660 | return false; | |
1661 | ||
1662 | gold_assert(!closure.saw_inputs()); | |
1663 | ||
1664 | return true; | |
1665 | } | |
1666 | ||
494e05f4 ILT |
1667 | // Print the script to F for debugging. |
1668 | ||
1669 | void | |
1670 | Script_options::print(FILE* f) const | |
1671 | { | |
1672 | fprintf(f, "%s: Dumping linker script\n", program_name); | |
1673 | ||
1674 | if (!this->entry_.empty()) | |
1675 | fprintf(f, "ENTRY(%s)\n", this->entry_.c_str()); | |
1676 | ||
1677 | for (Symbol_assignments::const_iterator p = | |
1678 | this->symbol_assignments_.begin(); | |
1679 | p != this->symbol_assignments_.end(); | |
1680 | ++p) | |
1681 | (*p)->print(f); | |
1682 | ||
1683 | for (Assertions::const_iterator p = this->assertions_.begin(); | |
1684 | p != this->assertions_.end(); | |
1685 | ++p) | |
1686 | (*p)->print(f); | |
1687 | ||
1688 | this->script_sections_.print(f); | |
1689 | ||
1690 | this->version_script_info_.print(f); | |
1691 | } | |
1692 | ||
dbe717ef | 1693 | // Manage mapping from keywords to the codes expected by the bison |
09124467 ILT |
1694 | // parser. We construct one global object for each lex mode with |
1695 | // keywords. | |
dbe717ef ILT |
1696 | |
1697 | class Keyword_to_parsecode | |
1698 | { | |
1699 | public: | |
1700 | // The structure which maps keywords to parsecodes. | |
1701 | struct Keyword_parsecode | |
1702 | { | |
1703 | // Keyword. | |
1704 | const char* keyword; | |
1705 | // Corresponding parsecode. | |
1706 | int parsecode; | |
1707 | }; | |
1708 | ||
09124467 ILT |
1709 | Keyword_to_parsecode(const Keyword_parsecode* keywords, |
1710 | int keyword_count) | |
1711 | : keyword_parsecodes_(keywords), keyword_count_(keyword_count) | |
1712 | { } | |
1713 | ||
dbe717ef ILT |
1714 | // Return the parsecode corresponding KEYWORD, or 0 if it is not a |
1715 | // keyword. | |
09124467 ILT |
1716 | int |
1717 | keyword_to_parsecode(const char* keyword, size_t len) const; | |
dbe717ef ILT |
1718 | |
1719 | private: | |
09124467 ILT |
1720 | const Keyword_parsecode* keyword_parsecodes_; |
1721 | const int keyword_count_; | |
dbe717ef ILT |
1722 | }; |
1723 | ||
1724 | // Mapping from keyword string to keyword parsecode. This array must | |
1725 | // be kept in sorted order. Parsecodes are looked up using bsearch. | |
1726 | // This array must correspond to the list of parsecodes in yyscript.y. | |
1727 | ||
09124467 ILT |
1728 | static const Keyword_to_parsecode::Keyword_parsecode |
1729 | script_keyword_parsecodes[] = | |
dbe717ef ILT |
1730 | { |
1731 | { "ABSOLUTE", ABSOLUTE }, | |
1732 | { "ADDR", ADDR }, | |
1733 | { "ALIGN", ALIGN_K }, | |
e5756efb | 1734 | { "ALIGNOF", ALIGNOF }, |
dbe717ef ILT |
1735 | { "ASSERT", ASSERT_K }, |
1736 | { "AS_NEEDED", AS_NEEDED }, | |
1737 | { "AT", AT }, | |
1738 | { "BIND", BIND }, | |
1739 | { "BLOCK", BLOCK }, | |
1740 | { "BYTE", BYTE }, | |
1741 | { "CONSTANT", CONSTANT }, | |
1742 | { "CONSTRUCTORS", CONSTRUCTORS }, | |
1e5d2fb1 | 1743 | { "COPY", COPY }, |
dbe717ef ILT |
1744 | { "CREATE_OBJECT_SYMBOLS", CREATE_OBJECT_SYMBOLS }, |
1745 | { "DATA_SEGMENT_ALIGN", DATA_SEGMENT_ALIGN }, | |
1746 | { "DATA_SEGMENT_END", DATA_SEGMENT_END }, | |
1747 | { "DATA_SEGMENT_RELRO_END", DATA_SEGMENT_RELRO_END }, | |
1748 | { "DEFINED", DEFINED }, | |
1e5d2fb1 | 1749 | { "DSECT", DSECT }, |
dbe717ef ILT |
1750 | { "ENTRY", ENTRY }, |
1751 | { "EXCLUDE_FILE", EXCLUDE_FILE }, | |
1752 | { "EXTERN", EXTERN }, | |
1753 | { "FILL", FILL }, | |
1754 | { "FLOAT", FLOAT }, | |
1755 | { "FORCE_COMMON_ALLOCATION", FORCE_COMMON_ALLOCATION }, | |
1756 | { "GROUP", GROUP }, | |
1757 | { "HLL", HLL }, | |
1758 | { "INCLUDE", INCLUDE }, | |
1e5d2fb1 | 1759 | { "INFO", INFO }, |
dbe717ef ILT |
1760 | { "INHIBIT_COMMON_ALLOCATION", INHIBIT_COMMON_ALLOCATION }, |
1761 | { "INPUT", INPUT }, | |
1762 | { "KEEP", KEEP }, | |
1763 | { "LENGTH", LENGTH }, | |
1764 | { "LOADADDR", LOADADDR }, | |
1765 | { "LONG", LONG }, | |
1766 | { "MAP", MAP }, | |
1767 | { "MAX", MAX_K }, | |
1768 | { "MEMORY", MEMORY }, | |
1769 | { "MIN", MIN_K }, | |
1770 | { "NEXT", NEXT }, | |
1771 | { "NOCROSSREFS", NOCROSSREFS }, | |
1772 | { "NOFLOAT", NOFLOAT }, | |
1e5d2fb1 | 1773 | { "NOLOAD", NOLOAD }, |
dbe717ef ILT |
1774 | { "ONLY_IF_RO", ONLY_IF_RO }, |
1775 | { "ONLY_IF_RW", ONLY_IF_RW }, | |
195e7dc6 | 1776 | { "OPTION", OPTION }, |
dbe717ef ILT |
1777 | { "ORIGIN", ORIGIN }, |
1778 | { "OUTPUT", OUTPUT }, | |
1779 | { "OUTPUT_ARCH", OUTPUT_ARCH }, | |
1780 | { "OUTPUT_FORMAT", OUTPUT_FORMAT }, | |
1781 | { "OVERLAY", OVERLAY }, | |
1782 | { "PHDRS", PHDRS }, | |
1783 | { "PROVIDE", PROVIDE }, | |
1784 | { "PROVIDE_HIDDEN", PROVIDE_HIDDEN }, | |
1785 | { "QUAD", QUAD }, | |
1786 | { "SEARCH_DIR", SEARCH_DIR }, | |
1787 | { "SECTIONS", SECTIONS }, | |
1788 | { "SEGMENT_START", SEGMENT_START }, | |
1789 | { "SHORT", SHORT }, | |
1790 | { "SIZEOF", SIZEOF }, | |
1791 | { "SIZEOF_HEADERS", SIZEOF_HEADERS }, | |
3802b2dd | 1792 | { "SORT", SORT_BY_NAME }, |
dbe717ef ILT |
1793 | { "SORT_BY_ALIGNMENT", SORT_BY_ALIGNMENT }, |
1794 | { "SORT_BY_NAME", SORT_BY_NAME }, | |
1795 | { "SPECIAL", SPECIAL }, | |
1796 | { "SQUAD", SQUAD }, | |
1797 | { "STARTUP", STARTUP }, | |
1798 | { "SUBALIGN", SUBALIGN }, | |
1799 | { "SYSLIB", SYSLIB }, | |
1800 | { "TARGET", TARGET_K }, | |
1801 | { "TRUNCATE", TRUNCATE }, | |
1802 | { "VERSION", VERSIONK }, | |
1803 | { "global", GLOBAL }, | |
1804 | { "l", LENGTH }, | |
1805 | { "len", LENGTH }, | |
1806 | { "local", LOCAL }, | |
1807 | { "o", ORIGIN }, | |
1808 | { "org", ORIGIN }, | |
1809 | { "sizeof_headers", SIZEOF_HEADERS }, | |
1810 | }; | |
1811 | ||
09124467 ILT |
1812 | static const Keyword_to_parsecode |
1813 | script_keywords(&script_keyword_parsecodes[0], | |
1814 | (sizeof(script_keyword_parsecodes) | |
1815 | / sizeof(script_keyword_parsecodes[0]))); | |
1816 | ||
1817 | static const Keyword_to_parsecode::Keyword_parsecode | |
1818 | version_script_keyword_parsecodes[] = | |
1819 | { | |
1820 | { "extern", EXTERN }, | |
1821 | { "global", GLOBAL }, | |
1822 | { "local", LOCAL }, | |
1823 | }; | |
1824 | ||
1825 | static const Keyword_to_parsecode | |
1826 | version_script_keywords(&version_script_keyword_parsecodes[0], | |
1827 | (sizeof(version_script_keyword_parsecodes) | |
1828 | / sizeof(version_script_keyword_parsecodes[0]))); | |
dbe717ef | 1829 | |
c82fbeee CS |
1830 | static const Keyword_to_parsecode::Keyword_parsecode |
1831 | dynamic_list_keyword_parsecodes[] = | |
1832 | { | |
1833 | { "extern", EXTERN }, | |
1834 | }; | |
1835 | ||
1836 | static const Keyword_to_parsecode | |
1837 | dynamic_list_keywords(&dynamic_list_keyword_parsecodes[0], | |
1838 | (sizeof(dynamic_list_keyword_parsecodes) | |
1839 | / sizeof(dynamic_list_keyword_parsecodes[0]))); | |
1840 | ||
1841 | ||
1842 | ||
dbe717ef ILT |
1843 | // Comparison function passed to bsearch. |
1844 | ||
1845 | extern "C" | |
1846 | { | |
1847 | ||
e5756efb ILT |
1848 | struct Ktt_key |
1849 | { | |
1850 | const char* str; | |
1851 | size_t len; | |
1852 | }; | |
1853 | ||
dbe717ef ILT |
1854 | static int |
1855 | ktt_compare(const void* keyv, const void* kttv) | |
1856 | { | |
e5756efb | 1857 | const Ktt_key* key = static_cast<const Ktt_key*>(keyv); |
dbe717ef ILT |
1858 | const Keyword_to_parsecode::Keyword_parsecode* ktt = |
1859 | static_cast<const Keyword_to_parsecode::Keyword_parsecode*>(kttv); | |
e5756efb ILT |
1860 | int i = strncmp(key->str, ktt->keyword, key->len); |
1861 | if (i != 0) | |
1862 | return i; | |
1863 | if (ktt->keyword[key->len] != '\0') | |
1864 | return -1; | |
1865 | return 0; | |
dbe717ef ILT |
1866 | } |
1867 | ||
1868 | } // End extern "C". | |
1869 | ||
1870 | int | |
09124467 ILT |
1871 | Keyword_to_parsecode::keyword_to_parsecode(const char* keyword, |
1872 | size_t len) const | |
dbe717ef | 1873 | { |
e5756efb ILT |
1874 | Ktt_key key; |
1875 | key.str = keyword; | |
1876 | key.len = len; | |
1877 | void* kttv = bsearch(&key, | |
09124467 ILT |
1878 | this->keyword_parsecodes_, |
1879 | this->keyword_count_, | |
1880 | sizeof(this->keyword_parsecodes_[0]), | |
1881 | ktt_compare); | |
dbe717ef ILT |
1882 | if (kttv == NULL) |
1883 | return 0; | |
1884 | Keyword_parsecode* ktt = static_cast<Keyword_parsecode*>(kttv); | |
1885 | return ktt->parsecode; | |
1886 | } | |
1887 | ||
494e05f4 ILT |
1888 | // The following structs are used within the VersionInfo class as well |
1889 | // as in the bison helper functions. They store the information | |
1890 | // parsed from the version script. | |
dbe717ef | 1891 | |
494e05f4 ILT |
1892 | // A single version expression. |
1893 | // For example, pattern="std::map*" and language="C++". | |
62dfdd4d | 1894 | struct Version_expression |
6affe781 ILT |
1895 | { |
1896 | Version_expression(const std::string& a_pattern, | |
1897 | Version_script_info::Language a_language, | |
1898 | bool a_exact_match) | |
62dfdd4d ILT |
1899 | : pattern(a_pattern), language(a_language), exact_match(a_exact_match), |
1900 | was_matched_by_symbol(false) | |
6affe781 | 1901 | { } |
dbe717ef | 1902 | |
494e05f4 | 1903 | std::string pattern; |
6affe781 | 1904 | Version_script_info::Language language; |
494e05f4 ILT |
1905 | // If false, we use glob() to match pattern. If true, we use strcmp(). |
1906 | bool exact_match; | |
62dfdd4d ILT |
1907 | // True if --no-undefined-version is in effect and we found this |
1908 | // version in get_symbol_version. We use mutable because this | |
1909 | // struct is generally not modifiable after it has been created. | |
1910 | mutable bool was_matched_by_symbol; | |
494e05f4 | 1911 | }; |
dbe717ef | 1912 | |
494e05f4 | 1913 | // A list of expressions. |
6affe781 ILT |
1914 | struct Version_expression_list |
1915 | { | |
494e05f4 ILT |
1916 | std::vector<struct Version_expression> expressions; |
1917 | }; | |
e5756efb | 1918 | |
494e05f4 ILT |
1919 | // A list of which versions upon which another version depends. |
1920 | // Strings should be from the Stringpool. | |
6affe781 ILT |
1921 | struct Version_dependency_list |
1922 | { | |
494e05f4 ILT |
1923 | std::vector<std::string> dependencies; |
1924 | }; | |
dbe717ef | 1925 | |
494e05f4 ILT |
1926 | // The total definition of a version. It includes the tag for the |
1927 | // version, its global and local expressions, and any dependencies. | |
6affe781 ILT |
1928 | struct Version_tree |
1929 | { | |
494e05f4 | 1930 | Version_tree() |
6affe781 ILT |
1931 | : tag(), global(NULL), local(NULL), dependencies(NULL) |
1932 | { } | |
e5756efb | 1933 | |
494e05f4 ILT |
1934 | std::string tag; |
1935 | const struct Version_expression_list* global; | |
1936 | const struct Version_expression_list* local; | |
1937 | const struct Version_dependency_list* dependencies; | |
1938 | }; | |
dbe717ef | 1939 | |
98e090bd ILT |
1940 | // Helper class that calls cplus_demangle when needed and takes care of freeing |
1941 | // the result. | |
1942 | ||
1943 | class Lazy_demangler | |
1944 | { | |
1945 | public: | |
1946 | Lazy_demangler(const char* symbol, int options) | |
1947 | : symbol_(symbol), options_(options), demangled_(NULL), did_demangle_(false) | |
1948 | { } | |
1949 | ||
1950 | ~Lazy_demangler() | |
1951 | { free(this->demangled_); } | |
1952 | ||
1953 | // Return the demangled name. The actual demangling happens on the first call, | |
1954 | // and the result is later cached. | |
1955 | inline char* | |
1956 | get(); | |
1957 | ||
1958 | private: | |
1959 | // The symbol to demangle. | |
ca09d69a | 1960 | const char* symbol_; |
98e090bd ILT |
1961 | // Option flags to pass to cplus_demagle. |
1962 | const int options_; | |
1963 | // The cached demangled value, or NULL if demangling didn't happen yet or | |
1964 | // failed. | |
ca09d69a | 1965 | char* demangled_; |
98e090bd ILT |
1966 | // Whether we already called cplus_demangle |
1967 | bool did_demangle_; | |
1968 | }; | |
1969 | ||
1970 | // Return the demangled name. The actual demangling happens on the first call, | |
1971 | // and the result is later cached. Returns NULL if the symbol cannot be | |
1972 | // demangled. | |
1973 | ||
1974 | inline char* | |
1975 | Lazy_demangler::get() | |
1976 | { | |
1977 | if (!this->did_demangle_) | |
1978 | { | |
1979 | this->demangled_ = cplus_demangle(this->symbol_, this->options_); | |
1980 | this->did_demangle_ = true; | |
1981 | } | |
1982 | return this->demangled_; | |
1983 | } | |
1984 | ||
6affe781 ILT |
1985 | // Class Version_script_info. |
1986 | ||
1987 | Version_script_info::Version_script_info() | |
98e090bd ILT |
1988 | : dependency_lists_(), expression_lists_(), version_trees_(), globs_(), |
1989 | default_version_(NULL), default_is_global_(false), is_finalized_(false) | |
6affe781 ILT |
1990 | { |
1991 | for (int i = 0; i < LANGUAGE_COUNT; ++i) | |
98e090bd | 1992 | this->exact_[i] = NULL; |
6affe781 ILT |
1993 | } |
1994 | ||
494e05f4 | 1995 | Version_script_info::~Version_script_info() |
1ef1f3d3 | 1996 | { |
1ef1f3d3 ILT |
1997 | } |
1998 | ||
6affe781 ILT |
1999 | // Forget all the known version script information. |
2000 | ||
1ef1f3d3 ILT |
2001 | void |
2002 | Version_script_info::clear() | |
494e05f4 | 2003 | { |
6affe781 ILT |
2004 | for (size_t k = 0; k < this->dependency_lists_.size(); ++k) |
2005 | delete this->dependency_lists_[k]; | |
1ef1f3d3 | 2006 | this->dependency_lists_.clear(); |
6affe781 ILT |
2007 | for (size_t k = 0; k < this->version_trees_.size(); ++k) |
2008 | delete this->version_trees_[k]; | |
1ef1f3d3 | 2009 | this->version_trees_.clear(); |
6affe781 ILT |
2010 | for (size_t k = 0; k < this->expression_lists_.size(); ++k) |
2011 | delete this->expression_lists_[k]; | |
1ef1f3d3 | 2012 | this->expression_lists_.clear(); |
dbe717ef ILT |
2013 | } |
2014 | ||
6affe781 ILT |
2015 | // Finalize the version script information. |
2016 | ||
2017 | void | |
2018 | Version_script_info::finalize() | |
2019 | { | |
2020 | if (!this->is_finalized_) | |
2021 | { | |
2022 | this->build_lookup_tables(); | |
2023 | this->is_finalized_ = true; | |
2024 | } | |
2025 | } | |
2026 | ||
2027 | // Return all the versions. | |
2028 | ||
494e05f4 ILT |
2029 | std::vector<std::string> |
2030 | Version_script_info::get_versions() const | |
dbe717ef | 2031 | { |
494e05f4 | 2032 | std::vector<std::string> ret; |
6affe781 | 2033 | for (size_t j = 0; j < this->version_trees_.size(); ++j) |
057ead22 ILT |
2034 | if (!this->version_trees_[j]->tag.empty()) |
2035 | ret.push_back(this->version_trees_[j]->tag); | |
494e05f4 | 2036 | return ret; |
dbe717ef ILT |
2037 | } |
2038 | ||
6affe781 ILT |
2039 | // Return the dependencies of VERSION. |
2040 | ||
494e05f4 ILT |
2041 | std::vector<std::string> |
2042 | Version_script_info::get_dependencies(const char* version) const | |
dbe717ef | 2043 | { |
494e05f4 | 2044 | std::vector<std::string> ret; |
6affe781 ILT |
2045 | for (size_t j = 0; j < this->version_trees_.size(); ++j) |
2046 | if (this->version_trees_[j]->tag == version) | |
494e05f4 ILT |
2047 | { |
2048 | const struct Version_dependency_list* deps = | |
6affe781 | 2049 | this->version_trees_[j]->dependencies; |
494e05f4 ILT |
2050 | if (deps != NULL) |
2051 | for (size_t k = 0; k < deps->dependencies.size(); ++k) | |
2052 | ret.push_back(deps->dependencies[k]); | |
2053 | return ret; | |
2054 | } | |
2055 | return ret; | |
2056 | } | |
2057 | ||
98e090bd ILT |
2058 | // A version script essentially maps a symbol name to a version tag |
2059 | // and an indication of whether symbol is global or local within that | |
2060 | // version tag. Each symbol maps to at most one version tag. | |
2061 | // Unfortunately, in practice, version scripts are ambiguous, and list | |
2062 | // symbols multiple times. Thus, we have to document the matching | |
2063 | // process. | |
2064 | ||
2065 | // This is a description of what the GNU linker does as of 2010-01-11. | |
2066 | // It walks through the version tags in the order in which they appear | |
2067 | // in the version script. For each tag, it first walks through the | |
2068 | // global patterns for that tag, then the local patterns. When | |
2069 | // looking at a single pattern, it first applies any language specific | |
2070 | // demangling as specified for the pattern, and then matches the | |
2071 | // resulting symbol name to the pattern. If it finds an exact match | |
2072 | // for a literal pattern (a pattern enclosed in quotes or with no | |
2073 | // wildcard characters), then that is the match that it uses. If | |
2074 | // finds a match with a wildcard pattern, then it saves it and | |
2075 | // continues searching. Wildcard patterns that are exactly "*" are | |
2076 | // saved separately. | |
2077 | ||
2078 | // If no exact match with a literal pattern is ever found, then if a | |
2079 | // wildcard match with a global pattern was found it is used, | |
2080 | // otherwise if a wildcard match with a local pattern was found it is | |
2081 | // used. | |
2082 | ||
2083 | // This is the result: | |
2084 | // * If there is an exact match, then we use the first tag in the | |
2085 | // version script where it matches. | |
2086 | // + If the exact match in that tag is global, it is used. | |
2087 | // + Otherwise the exact match in that tag is local, and is used. | |
2088 | // * Otherwise, if there is any match with a global wildcard pattern: | |
2089 | // + If there is any match with a wildcard pattern which is not | |
2090 | // "*", then we use the tag in which the *last* such pattern | |
2091 | // appears. | |
2092 | // + Otherwise, we matched "*". If there is no match with a local | |
2093 | // wildcard pattern which is not "*", then we use the *last* | |
2094 | // match with a global "*". Otherwise, continue. | |
2095 | // * Otherwise, if there is any match with a local wildcard pattern: | |
2096 | // + If there is any match with a wildcard pattern which is not | |
2097 | // "*", then we use the tag in which the *last* such pattern | |
2098 | // appears. | |
2099 | // + Otherwise, we matched "*", and we use the tag in which the | |
2100 | // *last* such match occurred. | |
2101 | ||
2102 | // There is an additional wrinkle. When the GNU linker finds a symbol | |
2103 | // with a version defined in an object file due to a .symver | |
2104 | // directive, it looks up that symbol name in that version tag. If it | |
2105 | // finds it, it matches the symbol name against the patterns for that | |
2106 | // version. If there is no match with a global pattern, but there is | |
2107 | // a match with a local pattern, then the GNU linker marks the symbol | |
2108 | // as local. | |
2109 | ||
2110 | // We want gold to be generally compatible, but we also want gold to | |
2111 | // be fast. These are the rules that gold implements: | |
2112 | // * If there is an exact match for the mangled name, we use it. | |
2113 | // + If there is more than one exact match, we give a warning, and | |
2114 | // we use the first tag in the script which matches. | |
2115 | // + If a symbol has an exact match as both global and local for | |
2116 | // the same version tag, we give an error. | |
2117 | // * Otherwise, we look for an extern C++ or an extern Java exact | |
2118 | // match. If we find an exact match, we use it. | |
2119 | // + If there is more than one exact match, we give a warning, and | |
2120 | // we use the first tag in the script which matches. | |
2121 | // + If a symbol has an exact match as both global and local for | |
2122 | // the same version tag, we give an error. | |
2123 | // * Otherwise, we look through the wildcard patterns, ignoring "*" | |
2124 | // patterns. We look through the version tags in reverse order. | |
2125 | // For each version tag, we look through the global patterns and | |
2126 | // then the local patterns. We use the first match we find (i.e., | |
2127 | // the last matching version tag in the file). | |
2128 | // * Otherwise, we use the "*" pattern if there is one. We give an | |
2129 | // error if there are multiple "*" patterns. | |
2130 | ||
2131 | // At least for now, gold does not look up the version tag for a | |
2132 | // symbol version found in an object file to see if it should be | |
2133 | // forced local. There are other ways to force a symbol to be local, | |
2134 | // and I don't understand why this one is useful. | |
2135 | ||
6affe781 ILT |
2136 | // Build a set of fast lookup tables for a version script. |
2137 | ||
2138 | void | |
2139 | Version_script_info::build_lookup_tables() | |
2140 | { | |
2141 | size_t size = this->version_trees_.size(); | |
2142 | for (size_t j = 0; j < size; ++j) | |
2143 | { | |
2144 | const Version_tree* v = this->version_trees_[j]; | |
98e090bd ILT |
2145 | this->build_expression_list_lookup(v->local, v, false); |
2146 | this->build_expression_list_lookup(v->global, v, true); | |
2147 | } | |
2148 | } | |
2149 | ||
2150 | // If a pattern has backlashes but no unquoted wildcard characters, | |
2151 | // then we apply backslash unquoting and look for an exact match. | |
2152 | // Otherwise we treat it as a wildcard pattern. This function returns | |
2153 | // true for a wildcard pattern. Otherwise, it does backslash | |
2154 | // unquoting on *PATTERN and returns false. If this returns true, | |
2155 | // *PATTERN may have been partially unquoted. | |
2156 | ||
2157 | bool | |
2158 | Version_script_info::unquote(std::string* pattern) const | |
2159 | { | |
2160 | bool saw_backslash = false; | |
2161 | size_t len = pattern->length(); | |
2162 | size_t j = 0; | |
2163 | for (size_t i = 0; i < len; ++i) | |
2164 | { | |
2165 | if (saw_backslash) | |
2166 | saw_backslash = false; | |
2167 | else | |
2168 | { | |
2169 | switch ((*pattern)[i]) | |
2170 | { | |
2171 | case '?': case '[': case '*': | |
2172 | return true; | |
2173 | case '\\': | |
2174 | saw_backslash = true; | |
2175 | continue; | |
2176 | default: | |
2177 | break; | |
2178 | } | |
2179 | } | |
2180 | ||
2181 | if (i != j) | |
2182 | (*pattern)[j] = (*pattern)[i]; | |
2183 | ++j; | |
2184 | } | |
2185 | return false; | |
2186 | } | |
2187 | ||
2188 | // Add an exact match for MATCH to *PE. The result of the match is | |
2189 | // V/IS_GLOBAL. | |
2190 | ||
2191 | void | |
2192 | Version_script_info::add_exact_match(const std::string& match, | |
2193 | const Version_tree* v, bool is_global, | |
2194 | const Version_expression* ve, | |
ca09d69a | 2195 | Exact* pe) |
98e090bd ILT |
2196 | { |
2197 | std::pair<Exact::iterator, bool> ins = | |
2198 | pe->insert(std::make_pair(match, Version_tree_match(v, is_global, ve))); | |
2199 | if (ins.second) | |
2200 | { | |
2201 | // This is the first time we have seen this match. | |
2202 | return; | |
2203 | } | |
2204 | ||
2205 | Version_tree_match& vtm(ins.first->second); | |
2206 | if (vtm.real->tag != v->tag) | |
2207 | { | |
2208 | // This is an ambiguous match. We still return the | |
2209 | // first version that we found in the script, but we | |
2210 | // record the new version to issue a warning if we | |
2211 | // wind up looking up this symbol. | |
2212 | if (vtm.ambiguous == NULL) | |
2213 | vtm.ambiguous = v; | |
2214 | } | |
2215 | else if (is_global != vtm.is_global) | |
2216 | { | |
2217 | // We have a match for both the global and local entries for a | |
2218 | // version tag. That's got to be wrong. | |
2219 | gold_error(_("'%s' appears as both a global and a local symbol " | |
2220 | "for version '%s' in script"), | |
2221 | match.c_str(), v->tag.c_str()); | |
6affe781 ILT |
2222 | } |
2223 | } | |
2224 | ||
2225 | // Build fast lookup information for EXPLIST and store it in LOOKUP. | |
98e090bd ILT |
2226 | // All matches go to V, and IS_GLOBAL is true if they are global |
2227 | // matches. | |
6affe781 ILT |
2228 | |
2229 | void | |
2230 | Version_script_info::build_expression_list_lookup( | |
2231 | const Version_expression_list* explist, | |
2232 | const Version_tree* v, | |
98e090bd | 2233 | bool is_global) |
6affe781 ILT |
2234 | { |
2235 | if (explist == NULL) | |
2236 | return; | |
2237 | size_t size = explist->expressions.size(); | |
98e090bd | 2238 | for (size_t i = 0; i < size; ++i) |
6affe781 | 2239 | { |
98e090bd ILT |
2240 | const Version_expression& exp(explist->expressions[i]); |
2241 | ||
2242 | if (exp.pattern.length() == 1 && exp.pattern[0] == '*') | |
6affe781 | 2243 | { |
98e090bd ILT |
2244 | if (this->default_version_ != NULL |
2245 | && this->default_version_->tag != v->tag) | |
d0a91bd8 ILT |
2246 | gold_warning(_("wildcard match appears in both version '%s' " |
2247 | "and '%s' in script"), | |
2248 | this->default_version_->tag.c_str(), v->tag.c_str()); | |
98e090bd ILT |
2249 | else if (this->default_version_ != NULL |
2250 | && this->default_is_global_ != is_global) | |
2251 | gold_error(_("wildcard match appears as both global and local " | |
2252 | "in version '%s' in script"), | |
2253 | v->tag.c_str()); | |
2254 | this->default_version_ = v; | |
2255 | this->default_is_global_ = is_global; | |
2256 | continue; | |
2257 | } | |
2258 | ||
2259 | std::string pattern = exp.pattern; | |
2260 | if (!exp.exact_match) | |
2261 | { | |
2262 | if (this->unquote(&pattern)) | |
6affe781 | 2263 | { |
98e090bd ILT |
2264 | this->globs_.push_back(Glob(&exp, v, is_global)); |
2265 | continue; | |
6affe781 ILT |
2266 | } |
2267 | } | |
98e090bd ILT |
2268 | |
2269 | if (this->exact_[exp.language] == NULL) | |
2270 | this->exact_[exp.language] = new Exact(); | |
2271 | this->add_exact_match(pattern, v, is_global, &exp, | |
2272 | this->exact_[exp.language]); | |
6affe781 ILT |
2273 | } |
2274 | } | |
2275 | ||
98e090bd ILT |
2276 | // Return the name to match given a name, a language code, and two |
2277 | // lazy demanglers. | |
62dfdd4d | 2278 | |
98e090bd ILT |
2279 | const char* |
2280 | Version_script_info::get_name_to_match(const char* name, | |
2281 | int language, | |
2282 | Lazy_demangler* cpp_demangler, | |
2283 | Lazy_demangler* java_demangler) const | |
62dfdd4d | 2284 | { |
98e090bd | 2285 | switch (language) |
62dfdd4d | 2286 | { |
98e090bd ILT |
2287 | case LANGUAGE_C: |
2288 | return name; | |
2289 | case LANGUAGE_CXX: | |
2290 | return cpp_demangler->get(); | |
2291 | case LANGUAGE_JAVA: | |
2292 | return java_demangler->get(); | |
2293 | default: | |
2294 | gold_unreachable(); | |
62dfdd4d | 2295 | } |
62dfdd4d ILT |
2296 | } |
2297 | ||
98e090bd ILT |
2298 | // Look up SYMBOL_NAME in the list of versions. Return true if the |
2299 | // symbol is found, false if not. If the symbol is found, then if | |
2300 | // PVERSION is not NULL, set *PVERSION to the version tag, and if | |
2301 | // P_IS_GLOBAL is not NULL, set *P_IS_GLOBAL according to whether the | |
2302 | // symbol is global or not. | |
057ead22 ILT |
2303 | |
2304 | bool | |
98e090bd ILT |
2305 | Version_script_info::get_symbol_version(const char* symbol_name, |
2306 | std::string* pversion, | |
2307 | bool* p_is_global) const | |
494e05f4 | 2308 | { |
98e090bd ILT |
2309 | Lazy_demangler cpp_demangled_name(symbol_name, DMGL_ANSI | DMGL_PARAMS); |
2310 | Lazy_demangler java_demangled_name(symbol_name, | |
2311 | DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA); | |
2312 | ||
6affe781 | 2313 | gold_assert(this->is_finalized_); |
6affe781 | 2314 | for (int i = 0; i < LANGUAGE_COUNT; ++i) |
494e05f4 | 2315 | { |
98e090bd ILT |
2316 | Exact* exact = this->exact_[i]; |
2317 | if (exact == NULL) | |
6affe781 ILT |
2318 | continue; |
2319 | ||
98e090bd ILT |
2320 | const char* name_to_match = this->get_name_to_match(symbol_name, i, |
2321 | &cpp_demangled_name, | |
2322 | &java_demangled_name); | |
2323 | if (name_to_match == NULL) | |
6affe781 | 2324 | { |
98e090bd ILT |
2325 | // If the name can not be demangled, the GNU linker goes |
2326 | // ahead and tries to match it anyhow. That does not | |
2327 | // make sense to me and I have not implemented it. | |
2328 | continue; | |
6affe781 ILT |
2329 | } |
2330 | ||
98e090bd ILT |
2331 | Exact::const_iterator pe = exact->find(name_to_match); |
2332 | if (pe != exact->end()) | |
6affe781 | 2333 | { |
98e090bd ILT |
2334 | const Version_tree_match& vtm(pe->second); |
2335 | if (vtm.ambiguous != NULL) | |
2336 | gold_warning(_("using '%s' as version for '%s' which is also " | |
2337 | "named in version '%s' in script"), | |
2338 | vtm.real->tag.c_str(), name_to_match, | |
2339 | vtm.ambiguous->tag.c_str()); | |
2340 | ||
6affe781 | 2341 | if (pversion != NULL) |
98e090bd ILT |
2342 | *pversion = vtm.real->tag; |
2343 | if (p_is_global != NULL) | |
2344 | *p_is_global = vtm.is_global; | |
62dfdd4d ILT |
2345 | |
2346 | // If we are using --no-undefined-version, and this is a | |
2347 | // global symbol, we have to record that we have found this | |
2348 | // symbol, so that we don't warn about it. We have to do | |
2349 | // this now, because otherwise we have no way to get from a | |
2350 | // non-C language back to the demangled name that we | |
2351 | // matched. | |
98e090bd ILT |
2352 | if (p_is_global != NULL && vtm.is_global) |
2353 | vtm.expression->was_matched_by_symbol = true; | |
62dfdd4d | 2354 | |
6affe781 ILT |
2355 | return true; |
2356 | } | |
98e090bd ILT |
2357 | } |
2358 | ||
2359 | // Look through the glob patterns in reverse order. | |
6affe781 | 2360 | |
98e090bd ILT |
2361 | for (Globs::const_reverse_iterator p = this->globs_.rbegin(); |
2362 | p != this->globs_.rend(); | |
2363 | ++p) | |
2364 | { | |
2365 | int language = p->expression->language; | |
2366 | const char* name_to_match = this->get_name_to_match(symbol_name, | |
2367 | language, | |
2368 | &cpp_demangled_name, | |
2369 | &java_demangled_name); | |
2370 | if (name_to_match == NULL) | |
2371 | continue; | |
2372 | ||
2373 | if (fnmatch(p->expression->pattern.c_str(), name_to_match, | |
2374 | FNM_NOESCAPE) == 0) | |
6affe781 | 2375 | { |
98e090bd ILT |
2376 | if (pversion != NULL) |
2377 | *pversion = p->version->tag; | |
2378 | if (p_is_global != NULL) | |
2379 | *p_is_global = p->is_global; | |
2380 | return true; | |
6affe781 | 2381 | } |
98e090bd | 2382 | } |
6affe781 | 2383 | |
98e090bd ILT |
2384 | // Finally, there may be a wildcard. |
2385 | if (this->default_version_ != NULL) | |
2386 | { | |
2387 | if (pversion != NULL) | |
2388 | *pversion = this->default_version_->tag; | |
2389 | if (p_is_global != NULL) | |
2390 | *p_is_global = this->default_is_global_; | |
2391 | return true; | |
494e05f4 | 2392 | } |
6affe781 | 2393 | |
057ead22 | 2394 | return false; |
494e05f4 ILT |
2395 | } |
2396 | ||
62dfdd4d ILT |
2397 | // Give an error if any exact symbol names (not wildcards) appear in a |
2398 | // version script, but there is no such symbol. | |
2399 | ||
2400 | void | |
2401 | Version_script_info::check_unmatched_names(const Symbol_table* symtab) const | |
2402 | { | |
2403 | for (size_t i = 0; i < this->version_trees_.size(); ++i) | |
2404 | { | |
2405 | const Version_tree* vt = this->version_trees_[i]; | |
2406 | if (vt->global == NULL) | |
2407 | continue; | |
2408 | for (size_t j = 0; j < vt->global->expressions.size(); ++j) | |
2409 | { | |
2410 | const Version_expression& expression(vt->global->expressions[j]); | |
2411 | ||
2412 | // Ignore cases where we used the version because we saw a | |
2413 | // symbol that we looked up. Note that | |
2414 | // WAS_MATCHED_BY_SYMBOL will be true even if the symbol was | |
2415 | // not a definition. That's OK as in that case we most | |
2416 | // likely gave an undefined symbol error anyhow. | |
2417 | if (expression.was_matched_by_symbol) | |
2418 | continue; | |
2419 | ||
2420 | // Just ignore names which are in languages other than C. | |
2421 | // We have no way to look them up in the symbol table. | |
2422 | if (expression.language != LANGUAGE_C) | |
2423 | continue; | |
2424 | ||
98e090bd ILT |
2425 | // Remove backslash quoting, and ignore wildcard patterns. |
2426 | std::string pattern = expression.pattern; | |
2427 | if (!expression.exact_match) | |
62dfdd4d | 2428 | { |
98e090bd ILT |
2429 | if (this->unquote(&pattern)) |
2430 | continue; | |
62dfdd4d | 2431 | } |
98e090bd ILT |
2432 | |
2433 | if (symtab->lookup(pattern.c_str(), vt->tag.c_str()) == NULL) | |
2434 | gold_error(_("version script assignment of %s to symbol %s " | |
2435 | "failed: symbol not defined"), | |
2436 | vt->tag.c_str(), pattern.c_str()); | |
62dfdd4d ILT |
2437 | } |
2438 | } | |
2439 | } | |
2440 | ||
494e05f4 ILT |
2441 | struct Version_dependency_list* |
2442 | Version_script_info::allocate_dependency_list() | |
2443 | { | |
2444 | dependency_lists_.push_back(new Version_dependency_list); | |
2445 | return dependency_lists_.back(); | |
2446 | } | |
2447 | ||
2448 | struct Version_expression_list* | |
2449 | Version_script_info::allocate_expression_list() | |
2450 | { | |
2451 | expression_lists_.push_back(new Version_expression_list); | |
2452 | return expression_lists_.back(); | |
2453 | } | |
2454 | ||
2455 | struct Version_tree* | |
2456 | Version_script_info::allocate_version_tree() | |
2457 | { | |
2458 | version_trees_.push_back(new Version_tree); | |
2459 | return version_trees_.back(); | |
2460 | } | |
2461 | ||
2462 | // Print for debugging. | |
2463 | ||
2464 | void | |
2465 | Version_script_info::print(FILE* f) const | |
2466 | { | |
2467 | if (this->empty()) | |
2468 | return; | |
2469 | ||
2470 | fprintf(f, "VERSION {"); | |
2471 | ||
2472 | for (size_t i = 0; i < this->version_trees_.size(); ++i) | |
2473 | { | |
2474 | const Version_tree* vt = this->version_trees_[i]; | |
2475 | ||
2476 | if (vt->tag.empty()) | |
2477 | fprintf(f, " {\n"); | |
2478 | else | |
2479 | fprintf(f, " %s {\n", vt->tag.c_str()); | |
2480 | ||
2481 | if (vt->global != NULL) | |
2482 | { | |
2483 | fprintf(f, " global :\n"); | |
2484 | this->print_expression_list(f, vt->global); | |
2485 | } | |
2486 | ||
2487 | if (vt->local != NULL) | |
2488 | { | |
2489 | fprintf(f, " local :\n"); | |
2490 | this->print_expression_list(f, vt->local); | |
2491 | } | |
2492 | ||
2493 | fprintf(f, " }"); | |
2494 | if (vt->dependencies != NULL) | |
2495 | { | |
2496 | const Version_dependency_list* deps = vt->dependencies; | |
2497 | for (size_t j = 0; j < deps->dependencies.size(); ++j) | |
2498 | { | |
2499 | if (j < deps->dependencies.size() - 1) | |
2500 | fprintf(f, "\n"); | |
2501 | fprintf(f, " %s", deps->dependencies[j].c_str()); | |
2502 | } | |
2503 | } | |
2504 | fprintf(f, ";\n"); | |
2505 | } | |
2506 | ||
2507 | fprintf(f, "}\n"); | |
2508 | } | |
2509 | ||
2510 | void | |
2511 | Version_script_info::print_expression_list( | |
2512 | FILE* f, | |
2513 | const Version_expression_list* vel) const | |
2514 | { | |
6affe781 | 2515 | Version_script_info::Language current_language = LANGUAGE_C; |
494e05f4 ILT |
2516 | for (size_t i = 0; i < vel->expressions.size(); ++i) |
2517 | { | |
2518 | const Version_expression& ve(vel->expressions[i]); | |
2519 | ||
2520 | if (ve.language != current_language) | |
2521 | { | |
6affe781 | 2522 | if (current_language != LANGUAGE_C) |
494e05f4 | 2523 | fprintf(f, " }\n"); |
6affe781 ILT |
2524 | switch (ve.language) |
2525 | { | |
2526 | case LANGUAGE_C: | |
2527 | break; | |
2528 | case LANGUAGE_CXX: | |
2529 | fprintf(f, " extern \"C++\" {\n"); | |
2530 | break; | |
2531 | case LANGUAGE_JAVA: | |
2532 | fprintf(f, " extern \"Java\" {\n"); | |
2533 | break; | |
2534 | default: | |
2535 | gold_unreachable(); | |
2536 | } | |
494e05f4 ILT |
2537 | current_language = ve.language; |
2538 | } | |
2539 | ||
2540 | fprintf(f, " "); | |
6affe781 | 2541 | if (current_language != LANGUAGE_C) |
494e05f4 ILT |
2542 | fprintf(f, " "); |
2543 | ||
2544 | if (ve.exact_match) | |
2545 | fprintf(f, "\""); | |
2546 | fprintf(f, "%s", ve.pattern.c_str()); | |
2547 | if (ve.exact_match) | |
2548 | fprintf(f, "\""); | |
2549 | ||
2550 | fprintf(f, "\n"); | |
2551 | } | |
2552 | ||
6affe781 | 2553 | if (current_language != LANGUAGE_C) |
494e05f4 ILT |
2554 | fprintf(f, " }\n"); |
2555 | } | |
2556 | ||
2557 | } // End namespace gold. | |
2558 | ||
2559 | // The remaining functions are extern "C", so it's clearer to not put | |
2560 | // them in namespace gold. | |
2561 | ||
2562 | using namespace gold; | |
2563 | ||
2564 | // This function is called by the bison parser to return the next | |
2565 | // token. | |
2566 | ||
2567 | extern "C" int | |
2568 | yylex(YYSTYPE* lvalp, void* closurev) | |
2569 | { | |
2570 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2571 | const Token* token = closure->next_token(); | |
2572 | switch (token->classification()) | |
2573 | { | |
2574 | default: | |
2575 | gold_unreachable(); | |
2576 | ||
2577 | case Token::TOKEN_INVALID: | |
2578 | yyerror(closurev, "invalid character"); | |
2579 | return 0; | |
2580 | ||
2581 | case Token::TOKEN_EOF: | |
2582 | return 0; | |
2583 | ||
2584 | case Token::TOKEN_STRING: | |
2585 | { | |
2586 | // This is either a keyword or a STRING. | |
2587 | size_t len; | |
2588 | const char* str = token->string_value(&len); | |
2589 | int parsecode = 0; | |
2590 | switch (closure->lex_mode()) | |
2591 | { | |
2592 | case Lex::LINKER_SCRIPT: | |
2593 | parsecode = script_keywords.keyword_to_parsecode(str, len); | |
2594 | break; | |
2595 | case Lex::VERSION_SCRIPT: | |
2596 | parsecode = version_script_keywords.keyword_to_parsecode(str, len); | |
2597 | break; | |
c82fbeee CS |
2598 | case Lex::DYNAMIC_LIST: |
2599 | parsecode = dynamic_list_keywords.keyword_to_parsecode(str, len); | |
2600 | break; | |
494e05f4 ILT |
2601 | default: |
2602 | break; | |
2603 | } | |
2604 | if (parsecode != 0) | |
2605 | return parsecode; | |
2606 | lvalp->string.value = str; | |
2607 | lvalp->string.length = len; | |
2608 | return STRING; | |
2609 | } | |
2610 | ||
2611 | case Token::TOKEN_QUOTED_STRING: | |
2612 | lvalp->string.value = token->string_value(&lvalp->string.length); | |
2613 | return QUOTED_STRING; | |
2614 | ||
2615 | case Token::TOKEN_OPERATOR: | |
2616 | return token->operator_value(); | |
2617 | ||
2618 | case Token::TOKEN_INTEGER: | |
2619 | lvalp->integer = token->integer_value(); | |
2620 | return INTEGER; | |
2621 | } | |
2622 | } | |
2623 | ||
2624 | // This function is called by the bison parser to report an error. | |
2625 | ||
2626 | extern "C" void | |
2627 | yyerror(void* closurev, const char* message) | |
2628 | { | |
2629 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2630 | gold_error(_("%s:%d:%d: %s"), closure->filename(), closure->lineno(), | |
2631 | closure->charpos(), message); | |
2632 | } | |
2633 | ||
afc06bb8 ILT |
2634 | // Called by the bison parser to add an external symbol to the link. |
2635 | ||
2636 | extern "C" void | |
2637 | script_add_extern(void* closurev, const char* name, size_t length) | |
2638 | { | |
d433c3ac ILT |
2639 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
2640 | closure->script_options()->add_symbol_reference(name, length); | |
afc06bb8 ILT |
2641 | } |
2642 | ||
494e05f4 ILT |
2643 | // Called by the bison parser to add a file to the link. |
2644 | ||
2645 | extern "C" void | |
2646 | script_add_file(void* closurev, const char* name, size_t length) | |
2647 | { | |
2648 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2649 | ||
2650 | // If this is an absolute path, and we found the script in the | |
2651 | // sysroot, then we want to prepend the sysroot to the file name. | |
2652 | // For example, this is how we handle a cross link to the x86_64 | |
2653 | // libc.so, which refers to /lib/libc.so.6. | |
2654 | std::string name_string(name, length); | |
2655 | const char* extra_search_path = "."; | |
2656 | std::string script_directory; | |
2657 | if (IS_ABSOLUTE_PATH(name_string.c_str())) | |
2658 | { | |
2659 | if (closure->is_in_sysroot()) | |
2660 | { | |
8851ecca | 2661 | const std::string& sysroot(parameters->options().sysroot()); |
494e05f4 ILT |
2662 | gold_assert(!sysroot.empty()); |
2663 | name_string = sysroot + name_string; | |
2664 | } | |
2665 | } | |
2666 | else | |
2667 | { | |
2668 | // In addition to checking the normal library search path, we | |
2669 | // also want to check in the script-directory. | |
ca09d69a | 2670 | const char* slash = strrchr(closure->filename(), '/'); |
494e05f4 ILT |
2671 | if (slash != NULL) |
2672 | { | |
2673 | script_directory.assign(closure->filename(), | |
2674 | slash - closure->filename() + 1); | |
2675 | extra_search_path = script_directory.c_str(); | |
2676 | } | |
2677 | } | |
2678 | ||
ae3b5189 CD |
2679 | Input_file_argument file(name_string.c_str(), |
2680 | Input_file_argument::INPUT_FILE_TYPE_FILE, | |
2681 | extra_search_path, false, | |
2682 | closure->position_dependent_options()); | |
c7975edd CC |
2683 | Input_argument& arg = closure->inputs()->add_file(file); |
2684 | arg.set_script_info(closure->script_info()); | |
dbe717ef ILT |
2685 | } |
2686 | ||
e1df38aa NC |
2687 | // Called by the bison parser to add a library to the link. |
2688 | ||
2689 | extern "C" void | |
2690 | script_add_library(void* closurev, const char* name, size_t length) | |
2691 | { | |
2692 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2693 | std::string name_string(name, length); | |
2694 | ||
2695 | if (name_string[0] != 'l') | |
2696 | gold_error(_("library name must be prefixed with -l")); | |
2697 | ||
2698 | Input_file_argument file(name_string.c_str() + 1, | |
2699 | Input_file_argument::INPUT_FILE_TYPE_LIBRARY, | |
2700 | "", false, | |
2701 | closure->position_dependent_options()); | |
c7975edd CC |
2702 | Input_argument& arg = closure->inputs()->add_file(file); |
2703 | arg.set_script_info(closure->script_info()); | |
e1df38aa NC |
2704 | } |
2705 | ||
dbe717ef ILT |
2706 | // Called by the bison parser to start a group. If we are already in |
2707 | // a group, that means that this script was invoked within a | |
2708 | // --start-group --end-group sequence on the command line, or that | |
2709 | // this script was found in a GROUP of another script. In that case, | |
2710 | // we simply continue the existing group, rather than starting a new | |
2711 | // one. It is possible to construct a case in which this will do | |
2712 | // something other than what would happen if we did a recursive group, | |
2713 | // but it's hard to imagine why the different behaviour would be | |
2714 | // useful for a real program. Avoiding recursive groups is simpler | |
2715 | // and more efficient. | |
2716 | ||
2717 | extern "C" void | |
2718 | script_start_group(void* closurev) | |
2719 | { | |
2720 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2721 | if (!closure->in_group()) | |
2722 | closure->inputs()->start_group(); | |
2723 | } | |
2724 | ||
2725 | // Called by the bison parser at the end of a group. | |
2726 | ||
2727 | extern "C" void | |
2728 | script_end_group(void* closurev) | |
2729 | { | |
2730 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2731 | if (!closure->in_group()) | |
2732 | closure->inputs()->end_group(); | |
2733 | } | |
2734 | ||
2735 | // Called by the bison parser to start an AS_NEEDED list. | |
2736 | ||
2737 | extern "C" void | |
2738 | script_start_as_needed(void* closurev) | |
2739 | { | |
2740 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
45aa233b | 2741 | closure->position_dependent_options().set_as_needed(true); |
dbe717ef ILT |
2742 | } |
2743 | ||
2744 | // Called by the bison parser at the end of an AS_NEEDED list. | |
2745 | ||
2746 | extern "C" void | |
2747 | script_end_as_needed(void* closurev) | |
2748 | { | |
2749 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
45aa233b | 2750 | closure->position_dependent_options().set_as_needed(false); |
dbe717ef | 2751 | } |
195e7dc6 | 2752 | |
d391083d ILT |
2753 | // Called by the bison parser to set the entry symbol. |
2754 | ||
2755 | extern "C" void | |
e5756efb | 2756 | script_set_entry(void* closurev, const char* entry, size_t length) |
d391083d | 2757 | { |
a5dc0706 ILT |
2758 | // We'll parse this exactly the same as --entry=ENTRY on the commandline |
2759 | // TODO(csilvers): FIXME -- call set_entry directly. | |
1890b465 | 2760 | std::string arg("--entry="); |
a5dc0706 ILT |
2761 | arg.append(entry, length); |
2762 | script_parse_option(closurev, arg.c_str(), arg.size()); | |
e5756efb ILT |
2763 | } |
2764 | ||
0dfbdef4 ILT |
2765 | // Called by the bison parser to set whether to define common symbols. |
2766 | ||
2767 | extern "C" void | |
2768 | script_set_common_allocation(void* closurev, int set) | |
2769 | { | |
2770 | const char* arg = set != 0 ? "--define-common" : "--no-define-common"; | |
2771 | script_parse_option(closurev, arg, strlen(arg)); | |
2772 | } | |
2773 | ||
88a4108b ILT |
2774 | // Called by the bison parser to refer to a symbol. |
2775 | ||
2776 | extern "C" Expression* | |
ca09d69a | 2777 | script_symbol(void* closurev, const char* name, size_t length) |
88a4108b ILT |
2778 | { |
2779 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2780 | if (length != 1 || name[0] != '.') | |
2781 | closure->script_options()->add_symbol_reference(name, length); | |
2782 | return script_exp_string(name, length); | |
2783 | } | |
2784 | ||
e5756efb ILT |
2785 | // Called by the bison parser to define a symbol. |
2786 | ||
2787 | extern "C" void | |
2788 | script_set_symbol(void* closurev, const char* name, size_t length, | |
2789 | Expression* value, int providei, int hiddeni) | |
2790 | { | |
2791 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2792 | const bool provide = providei != 0; | |
2793 | const bool hidden = hiddeni != 0; | |
99fff23b ILT |
2794 | closure->script_options()->add_symbol_assignment(name, length, |
2795 | closure->parsing_defsym(), | |
2796 | value, provide, hidden); | |
15f8229b | 2797 | closure->clear_skip_on_incompatible_target(); |
d391083d ILT |
2798 | } |
2799 | ||
494e05f4 ILT |
2800 | // Called by the bison parser to add an assertion. |
2801 | ||
2802 | extern "C" void | |
2803 | script_add_assertion(void* closurev, Expression* check, const char* message, | |
2804 | size_t messagelen) | |
2805 | { | |
2806 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2807 | closure->script_options()->add_assertion(check, message, messagelen); | |
15f8229b | 2808 | closure->clear_skip_on_incompatible_target(); |
494e05f4 ILT |
2809 | } |
2810 | ||
195e7dc6 ILT |
2811 | // Called by the bison parser to parse an OPTION. |
2812 | ||
2813 | extern "C" void | |
e5756efb | 2814 | script_parse_option(void* closurev, const char* option, size_t length) |
195e7dc6 ILT |
2815 | { |
2816 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
a0451b38 ILT |
2817 | // We treat the option as a single command-line option, even if |
2818 | // it has internal whitespace. | |
2819 | if (closure->command_line() == NULL) | |
2820 | { | |
2821 | // There are some options that we could handle here--e.g., | |
2822 | // -lLIBRARY. Should we bother? | |
e5756efb | 2823 | gold_warning(_("%s:%d:%d: ignoring command OPTION; OPTION is only valid" |
d391083d | 2824 | " for scripts specified via -T/--script"), |
e5756efb | 2825 | closure->filename(), closure->lineno(), closure->charpos()); |
a0451b38 ILT |
2826 | } |
2827 | else | |
2828 | { | |
2829 | bool past_a_double_dash_option = false; | |
ee1fe73e | 2830 | const char* mutable_option = strndup(option, length); |
e5756efb | 2831 | gold_assert(mutable_option != NULL); |
a0451b38 ILT |
2832 | closure->command_line()->process_one_option(1, &mutable_option, 0, |
2833 | &past_a_double_dash_option); | |
a5dc0706 ILT |
2834 | // The General_options class will quite possibly store a pointer |
2835 | // into mutable_option, so we can't free it. In cases the class | |
2836 | // does not store such a pointer, this is a memory leak. Alas. :( | |
a0451b38 | 2837 | } |
15f8229b ILT |
2838 | closure->clear_skip_on_incompatible_target(); |
2839 | } | |
2840 | ||
2841 | // Called by the bison parser to handle OUTPUT_FORMAT. OUTPUT_FORMAT | |
2842 | // takes either one or three arguments. In the three argument case, | |
2843 | // the format depends on the endianness option, which we don't | |
2844 | // currently support (FIXME). If we see an OUTPUT_FORMAT for the | |
2845 | // wrong format, then we want to search for a new file. Returning 0 | |
2846 | // here will cause the parser to immediately abort. | |
2847 | ||
2848 | extern "C" int | |
2849 | script_check_output_format(void* closurev, | |
2850 | const char* default_name, size_t default_length, | |
2851 | const char*, size_t, const char*, size_t) | |
2852 | { | |
2853 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2854 | std::string name(default_name, default_length); | |
03ef7571 | 2855 | Target* target = select_target_by_bfd_name(name.c_str()); |
15f8229b ILT |
2856 | if (target == NULL || !parameters->is_compatible_target(target)) |
2857 | { | |
2858 | if (closure->skip_on_incompatible_target()) | |
2859 | { | |
2860 | closure->set_found_incompatible_target(); | |
2861 | return 0; | |
2862 | } | |
2863 | // FIXME: Should we warn about the unknown target? | |
2864 | } | |
2865 | return 1; | |
195e7dc6 | 2866 | } |
e5756efb | 2867 | |
e6a307ba ILT |
2868 | // Called by the bison parser to handle TARGET. |
2869 | ||
2870 | extern "C" void | |
2871 | script_set_target(void* closurev, const char* target, size_t len) | |
2872 | { | |
2873 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2874 | std::string s(target, len); | |
2875 | General_options::Object_format format_enum; | |
2876 | format_enum = General_options::string_to_object_format(s.c_str()); | |
2877 | closure->position_dependent_options().set_format_enum(format_enum); | |
2878 | } | |
2879 | ||
3802b2dd ILT |
2880 | // Called by the bison parser to handle SEARCH_DIR. This is handled |
2881 | // exactly like a -L option. | |
2882 | ||
2883 | extern "C" void | |
2884 | script_add_search_dir(void* closurev, const char* option, size_t length) | |
2885 | { | |
2886 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2887 | if (closure->command_line() == NULL) | |
2888 | gold_warning(_("%s:%d:%d: ignoring SEARCH_DIR; SEARCH_DIR is only valid" | |
2889 | " for scripts specified via -T/--script"), | |
2890 | closure->filename(), closure->lineno(), closure->charpos()); | |
91e75c8a | 2891 | else if (!closure->command_line()->options().nostdlib()) |
3802b2dd ILT |
2892 | { |
2893 | std::string s = "-L" + std::string(option, length); | |
2894 | script_parse_option(closurev, s.c_str(), s.size()); | |
2895 | } | |
2896 | } | |
2897 | ||
e5756efb ILT |
2898 | /* Called by the bison parser to push the lexer into expression |
2899 | mode. */ | |
2900 | ||
494e05f4 | 2901 | extern "C" void |
e5756efb ILT |
2902 | script_push_lex_into_expression_mode(void* closurev) |
2903 | { | |
2904 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2905 | closure->push_lex_mode(Lex::EXPRESSION); | |
2906 | } | |
2907 | ||
09124467 ILT |
2908 | /* Called by the bison parser to push the lexer into version |
2909 | mode. */ | |
2910 | ||
494e05f4 | 2911 | extern "C" void |
09124467 ILT |
2912 | script_push_lex_into_version_mode(void* closurev) |
2913 | { | |
2914 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
6affe781 ILT |
2915 | if (closure->version_script()->is_finalized()) |
2916 | gold_error(_("%s:%d:%d: invalid use of VERSION in input file"), | |
2917 | closure->filename(), closure->lineno(), closure->charpos()); | |
09124467 ILT |
2918 | closure->push_lex_mode(Lex::VERSION_SCRIPT); |
2919 | } | |
2920 | ||
e5756efb ILT |
2921 | /* Called by the bison parser to pop the lexer mode. */ |
2922 | ||
494e05f4 | 2923 | extern "C" void |
e5756efb ILT |
2924 | script_pop_lex_mode(void* closurev) |
2925 | { | |
2926 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2927 | closure->pop_lex_mode(); | |
2928 | } | |
09124467 | 2929 | |
09124467 ILT |
2930 | // Register an entire version node. For example: |
2931 | // | |
2932 | // GLIBC_2.1 { | |
2933 | // global: foo; | |
2934 | // } GLIBC_2.0; | |
2935 | // | |
2936 | // - tag is "GLIBC_2.1" | |
2937 | // - tree contains the information "global: foo" | |
2938 | // - deps contains "GLIBC_2.0" | |
2939 | ||
2940 | extern "C" void | |
2941 | script_register_vers_node(void*, | |
2942 | const char* tag, | |
2943 | int taglen, | |
ca09d69a NC |
2944 | struct Version_tree* tree, |
2945 | struct Version_dependency_list* deps) | |
09124467 ILT |
2946 | { |
2947 | gold_assert(tree != NULL); | |
09124467 | 2948 | tree->dependencies = deps; |
057ead22 ILT |
2949 | if (tag != NULL) |
2950 | tree->tag = std::string(tag, taglen); | |
09124467 ILT |
2951 | } |
2952 | ||
2953 | // Add a dependencies to the list of existing dependencies, if any, | |
2954 | // and return the expanded list. | |
2955 | ||
ca09d69a | 2956 | extern "C" struct Version_dependency_list* |
09124467 | 2957 | script_add_vers_depend(void* closurev, |
ca09d69a NC |
2958 | struct Version_dependency_list* all_deps, |
2959 | const char* depend_to_add, int deplen) | |
09124467 ILT |
2960 | { |
2961 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2962 | if (all_deps == NULL) | |
2963 | all_deps = closure->version_script()->allocate_dependency_list(); | |
2964 | all_deps->dependencies.push_back(std::string(depend_to_add, deplen)); | |
2965 | return all_deps; | |
2966 | } | |
2967 | ||
2968 | // Add a pattern expression to an existing list of expressions, if any. | |
09124467 | 2969 | |
ca09d69a | 2970 | extern "C" struct Version_expression_list* |
09124467 | 2971 | script_new_vers_pattern(void* closurev, |
ca09d69a NC |
2972 | struct Version_expression_list* expressions, |
2973 | const char* pattern, int patlen, int exact_match) | |
09124467 ILT |
2974 | { |
2975 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2976 | if (expressions == NULL) | |
2977 | expressions = closure->version_script()->allocate_expression_list(); | |
2978 | expressions->expressions.push_back( | |
2979 | Version_expression(std::string(pattern, patlen), | |
10600224 ILT |
2980 | closure->get_current_language(), |
2981 | static_cast<bool>(exact_match))); | |
09124467 ILT |
2982 | return expressions; |
2983 | } | |
2984 | ||
10600224 ILT |
2985 | // Attaches b to the end of a, and clears b. So a = a + b and b = {}. |
2986 | ||
2987 | extern "C" struct Version_expression_list* | |
ca09d69a NC |
2988 | script_merge_expressions(struct Version_expression_list* a, |
2989 | struct Version_expression_list* b) | |
10600224 ILT |
2990 | { |
2991 | a->expressions.insert(a->expressions.end(), | |
2992 | b->expressions.begin(), b->expressions.end()); | |
2993 | // We could delete b and remove it from expressions_lists_, but | |
2994 | // that's a lot of work. This works just as well. | |
2995 | b->expressions.clear(); | |
2996 | return a; | |
2997 | } | |
2998 | ||
09124467 ILT |
2999 | // Combine the global and local expressions into a a Version_tree. |
3000 | ||
ca09d69a | 3001 | extern "C" struct Version_tree* |
09124467 | 3002 | script_new_vers_node(void* closurev, |
ca09d69a NC |
3003 | struct Version_expression_list* global, |
3004 | struct Version_expression_list* local) | |
09124467 ILT |
3005 | { |
3006 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3007 | Version_tree* tree = closure->version_script()->allocate_version_tree(); | |
3008 | tree->global = global; | |
3009 | tree->local = local; | |
3010 | return tree; | |
3011 | } | |
3012 | ||
10600224 | 3013 | // Handle a transition in language, such as at the |
09124467 ILT |
3014 | // start or end of 'extern "C++"' |
3015 | ||
3016 | extern "C" void | |
3017 | version_script_push_lang(void* closurev, const char* lang, int langlen) | |
3018 | { | |
3019 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
6affe781 ILT |
3020 | std::string language(lang, langlen); |
3021 | Version_script_info::Language code; | |
3022 | if (language.empty() || language == "C") | |
3023 | code = Version_script_info::LANGUAGE_C; | |
3024 | else if (language == "C++") | |
3025 | code = Version_script_info::LANGUAGE_CXX; | |
3026 | else if (language == "Java") | |
3027 | code = Version_script_info::LANGUAGE_JAVA; | |
3028 | else | |
3029 | { | |
3030 | char* buf = new char[langlen + 100]; | |
3031 | snprintf(buf, langlen + 100, | |
3032 | _("unrecognized version script language '%s'"), | |
3033 | language.c_str()); | |
3034 | yyerror(closurev, buf); | |
3035 | delete[] buf; | |
3036 | code = Version_script_info::LANGUAGE_C; | |
3037 | } | |
3038 | closure->push_language(code); | |
09124467 ILT |
3039 | } |
3040 | ||
3041 | extern "C" void | |
3042 | version_script_pop_lang(void* closurev) | |
3043 | { | |
3044 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3045 | closure->pop_language(); | |
3046 | } | |
494e05f4 ILT |
3047 | |
3048 | // Called by the bison parser to start a SECTIONS clause. | |
3049 | ||
3050 | extern "C" void | |
3051 | script_start_sections(void* closurev) | |
3052 | { | |
3053 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3054 | closure->script_options()->script_sections()->start_sections(); | |
15f8229b | 3055 | closure->clear_skip_on_incompatible_target(); |
494e05f4 ILT |
3056 | } |
3057 | ||
3058 | // Called by the bison parser to finish a SECTIONS clause. | |
3059 | ||
3060 | extern "C" void | |
3061 | script_finish_sections(void* closurev) | |
3062 | { | |
3063 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3064 | closure->script_options()->script_sections()->finish_sections(); | |
3065 | } | |
3066 | ||
3067 | // Start processing entries for an output section. | |
3068 | ||
3069 | extern "C" void | |
3070 | script_start_output_section(void* closurev, const char* name, size_t namelen, | |
3071 | const struct Parser_output_section_header* header) | |
3072 | { | |
3073 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3074 | closure->script_options()->script_sections()->start_output_section(name, | |
3075 | namelen, | |
3076 | header); | |
3077 | } | |
3078 | ||
3079 | // Finish processing entries for an output section. | |
3080 | ||
3081 | extern "C" void | |
c82fbeee | 3082 | script_finish_output_section(void* closurev, |
494e05f4 ILT |
3083 | const struct Parser_output_section_trailer* trail) |
3084 | { | |
3085 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3086 | closure->script_options()->script_sections()->finish_output_section(trail); | |
3087 | } | |
3088 | ||
3089 | // Add a data item (e.g., "WORD (0)") to the current output section. | |
3090 | ||
3091 | extern "C" void | |
3092 | script_add_data(void* closurev, int data_token, Expression* val) | |
3093 | { | |
3094 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3095 | int size; | |
3096 | bool is_signed = true; | |
3097 | switch (data_token) | |
3098 | { | |
3099 | case QUAD: | |
3100 | size = 8; | |
3101 | is_signed = false; | |
3102 | break; | |
3103 | case SQUAD: | |
3104 | size = 8; | |
3105 | break; | |
3106 | case LONG: | |
3107 | size = 4; | |
3108 | break; | |
3109 | case SHORT: | |
3110 | size = 2; | |
3111 | break; | |
3112 | case BYTE: | |
3113 | size = 1; | |
3114 | break; | |
3115 | default: | |
3116 | gold_unreachable(); | |
3117 | } | |
3118 | closure->script_options()->script_sections()->add_data(size, is_signed, val); | |
3119 | } | |
3120 | ||
3121 | // Add a clause setting the fill value to the current output section. | |
3122 | ||
3123 | extern "C" void | |
3124 | script_add_fill(void* closurev, Expression* val) | |
3125 | { | |
3126 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3127 | closure->script_options()->script_sections()->add_fill(val); | |
3128 | } | |
3129 | ||
3130 | // Add a new input section specification to the current output | |
3131 | // section. | |
3132 | ||
3133 | extern "C" void | |
3134 | script_add_input_section(void* closurev, | |
3135 | const struct Input_section_spec* spec, | |
3136 | int keepi) | |
3137 | { | |
3138 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3139 | bool keep = keepi != 0; | |
3140 | closure->script_options()->script_sections()->add_input_section(spec, keep); | |
3141 | } | |
3142 | ||
2d924fd9 ILT |
3143 | // When we see DATA_SEGMENT_ALIGN we record that following output |
3144 | // sections may be relro. | |
3145 | ||
3146 | extern "C" void | |
3147 | script_data_segment_align(void* closurev) | |
3148 | { | |
3149 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3150 | if (!closure->script_options()->saw_sections_clause()) | |
3151 | gold_error(_("%s:%d:%d: DATA_SEGMENT_ALIGN not in SECTIONS clause"), | |
3152 | closure->filename(), closure->lineno(), closure->charpos()); | |
3153 | else | |
3154 | closure->script_options()->script_sections()->data_segment_align(); | |
3155 | } | |
3156 | ||
3157 | // When we see DATA_SEGMENT_RELRO_END we know that all output sections | |
3158 | // since DATA_SEGMENT_ALIGN should be relro. | |
3159 | ||
3160 | extern "C" void | |
3161 | script_data_segment_relro_end(void* closurev) | |
3162 | { | |
3163 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3164 | if (!closure->script_options()->saw_sections_clause()) | |
3165 | gold_error(_("%s:%d:%d: DATA_SEGMENT_ALIGN not in SECTIONS clause"), | |
3166 | closure->filename(), closure->lineno(), closure->charpos()); | |
3167 | else | |
3168 | closure->script_options()->script_sections()->data_segment_relro_end(); | |
3169 | } | |
3170 | ||
494e05f4 ILT |
3171 | // Create a new list of string/sort pairs. |
3172 | ||
3173 | extern "C" String_sort_list_ptr | |
3174 | script_new_string_sort_list(const struct Wildcard_section* string_sort) | |
3175 | { | |
3176 | return new String_sort_list(1, *string_sort); | |
3177 | } | |
3178 | ||
3179 | // Add an entry to a list of string/sort pairs. The way the parser | |
3180 | // works permits us to simply modify the first parameter, rather than | |
3181 | // copy the vector. | |
3182 | ||
3183 | extern "C" String_sort_list_ptr | |
3184 | script_string_sort_list_add(String_sort_list_ptr pv, | |
3185 | const struct Wildcard_section* string_sort) | |
3186 | { | |
a445fddf ILT |
3187 | if (pv == NULL) |
3188 | return script_new_string_sort_list(string_sort); | |
3189 | else | |
3190 | { | |
3191 | pv->push_back(*string_sort); | |
3192 | return pv; | |
3193 | } | |
494e05f4 ILT |
3194 | } |
3195 | ||
3196 | // Create a new list of strings. | |
3197 | ||
3198 | extern "C" String_list_ptr | |
3199 | script_new_string_list(const char* str, size_t len) | |
3200 | { | |
3201 | return new String_list(1, std::string(str, len)); | |
3202 | } | |
3203 | ||
3204 | // Add an element to a list of strings. The way the parser works | |
3205 | // permits us to simply modify the first parameter, rather than copy | |
3206 | // the vector. | |
3207 | ||
3208 | extern "C" String_list_ptr | |
3209 | script_string_list_push_back(String_list_ptr pv, const char* str, size_t len) | |
3210 | { | |
1c4f3631 ILT |
3211 | if (pv == NULL) |
3212 | return script_new_string_list(str, len); | |
3213 | else | |
3214 | { | |
3215 | pv->push_back(std::string(str, len)); | |
3216 | return pv; | |
3217 | } | |
494e05f4 ILT |
3218 | } |
3219 | ||
3220 | // Concatenate two string lists. Either or both may be NULL. The way | |
3221 | // the parser works permits us to modify the parameters, rather than | |
3222 | // copy the vector. | |
3223 | ||
3224 | extern "C" String_list_ptr | |
3225 | script_string_list_append(String_list_ptr pv1, String_list_ptr pv2) | |
3226 | { | |
3227 | if (pv1 == NULL) | |
3228 | return pv2; | |
3229 | if (pv2 == NULL) | |
3230 | return pv1; | |
3231 | pv1->insert(pv1->end(), pv2->begin(), pv2->end()); | |
3232 | return pv1; | |
3233 | } | |
1c4f3631 ILT |
3234 | |
3235 | // Add a new program header. | |
3236 | ||
3237 | extern "C" void | |
3238 | script_add_phdr(void* closurev, const char* name, size_t namelen, | |
3239 | unsigned int type, const Phdr_info* info) | |
3240 | { | |
3241 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3242 | bool includes_filehdr = info->includes_filehdr != 0; | |
3243 | bool includes_phdrs = info->includes_phdrs != 0; | |
3244 | bool is_flags_valid = info->is_flags_valid != 0; | |
3245 | Script_sections* ss = closure->script_options()->script_sections(); | |
3246 | ss->add_phdr(name, namelen, type, includes_filehdr, includes_phdrs, | |
3247 | is_flags_valid, info->flags, info->load_address); | |
15f8229b | 3248 | closure->clear_skip_on_incompatible_target(); |
1c4f3631 ILT |
3249 | } |
3250 | ||
3251 | // Convert a program header string to a type. | |
3252 | ||
3253 | #define PHDR_TYPE(NAME) { #NAME, sizeof(#NAME) - 1, elfcpp::NAME } | |
3254 | ||
3255 | static struct | |
3256 | { | |
3257 | const char* name; | |
3258 | size_t namelen; | |
3259 | unsigned int val; | |
3260 | } phdr_type_names[] = | |
3261 | { | |
3262 | PHDR_TYPE(PT_NULL), | |
3263 | PHDR_TYPE(PT_LOAD), | |
3264 | PHDR_TYPE(PT_DYNAMIC), | |
3265 | PHDR_TYPE(PT_INTERP), | |
3266 | PHDR_TYPE(PT_NOTE), | |
3267 | PHDR_TYPE(PT_SHLIB), | |
3268 | PHDR_TYPE(PT_PHDR), | |
3269 | PHDR_TYPE(PT_TLS), | |
3270 | PHDR_TYPE(PT_GNU_EH_FRAME), | |
3271 | PHDR_TYPE(PT_GNU_STACK), | |
3272 | PHDR_TYPE(PT_GNU_RELRO) | |
3273 | }; | |
3274 | ||
3275 | extern "C" unsigned int | |
3276 | script_phdr_string_to_type(void* closurev, const char* name, size_t namelen) | |
3277 | { | |
3278 | for (unsigned int i = 0; | |
3279 | i < sizeof(phdr_type_names) / sizeof(phdr_type_names[0]); | |
3280 | ++i) | |
3281 | if (namelen == phdr_type_names[i].namelen | |
3282 | && strncmp(name, phdr_type_names[i].name, namelen) == 0) | |
3283 | return phdr_type_names[i].val; | |
3284 | yyerror(closurev, _("unknown PHDR type (try integer)")); | |
3285 | return elfcpp::PT_NULL; | |
3286 | } | |
3c12dcdb DK |
3287 | |
3288 | extern "C" void | |
3289 | script_saw_segment_start_expression(void* closurev) | |
3290 | { | |
3291 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3292 | Script_sections* ss = closure->script_options()->script_sections(); | |
3293 | ss->set_saw_segment_start_expression(true); | |
3294 | } | |
7f8cd844 NC |
3295 | |
3296 | extern "C" void | |
3297 | script_set_section_region(void* closurev, const char* name, size_t namelen, | |
3298 | int set_vma) | |
3299 | { | |
3300 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3301 | if (!closure->script_options()->saw_sections_clause()) | |
3302 | { | |
3303 | gold_error(_("%s:%d:%d: MEMORY region '%.*s' referred to outside of " | |
3304 | "SECTIONS clause"), | |
3305 | closure->filename(), closure->lineno(), closure->charpos(), | |
33dbc701 | 3306 | static_cast<int>(namelen), name); |
7f8cd844 NC |
3307 | return; |
3308 | } | |
3309 | ||
3310 | Script_sections* ss = closure->script_options()->script_sections(); | |
3311 | Memory_region* mr = ss->find_memory_region(name, namelen); | |
3312 | if (mr == NULL) | |
3313 | { | |
3314 | gold_error(_("%s:%d:%d: MEMORY region '%.*s' not declared"), | |
3315 | closure->filename(), closure->lineno(), closure->charpos(), | |
33dbc701 | 3316 | static_cast<int>(namelen), name); |
7f8cd844 NC |
3317 | return; |
3318 | } | |
3319 | ||
3320 | ss->set_memory_region(mr, set_vma); | |
3321 | } | |
3322 | ||
3323 | extern "C" void | |
3324 | script_add_memory(void* closurev, const char* name, size_t namelen, | |
3325 | unsigned int attrs, Expression* origin, Expression* length) | |
3326 | { | |
3327 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3328 | Script_sections* ss = closure->script_options()->script_sections(); | |
3329 | ss->add_memory_region(name, namelen, attrs, origin, length); | |
3330 | } | |
3331 | ||
3332 | extern "C" unsigned int | |
3333 | script_parse_memory_attr(void* closurev, const char* attrs, size_t attrlen, | |
3334 | int invert) | |
3335 | { | |
3336 | int attributes = 0; | |
3337 | ||
3338 | while (attrlen--) | |
3339 | switch (*attrs++) | |
3340 | { | |
3341 | case 'R': | |
3342 | case 'r': | |
3343 | attributes |= MEM_READABLE; break; | |
3344 | case 'W': | |
3345 | case 'w': | |
3346 | attributes |= MEM_READABLE | MEM_WRITEABLE; break; | |
3347 | case 'X': | |
3348 | case 'x': | |
3349 | attributes |= MEM_EXECUTABLE; break; | |
3350 | case 'A': | |
3351 | case 'a': | |
3352 | attributes |= MEM_ALLOCATABLE; break; | |
3353 | case 'I': | |
3354 | case 'i': | |
3355 | case 'L': | |
3356 | case 'l': | |
3357 | attributes |= MEM_INITIALIZED; break; | |
3358 | default: | |
3359 | yyerror(closurev, _("unknown MEMORY attribute")); | |
3360 | } | |
3361 | ||
3362 | if (invert) | |
3363 | attributes = (~ attributes) & MEM_ATTR_MASK; | |
3364 | ||
3365 | return attributes; | |
3366 | } | |
3367 | ||
3368 | extern "C" void | |
410da591 CC |
3369 | script_include_directive(int first_token, void* closurev, |
3370 | const char* filename, size_t length) | |
7f8cd844 | 3371 | { |
628f39be SA |
3372 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
3373 | std::string name(filename, length); | |
3374 | Command_line* cmdline = closure->command_line(); | |
3375 | read_script_file(name.c_str(), cmdline, &cmdline->script_options(), | |
410da591 | 3376 | first_token, Lex::LINKER_SCRIPT); |
7f8cd844 NC |
3377 | } |
3378 | ||
3379 | // Functions for memory regions. | |
3380 | ||
3381 | extern "C" Expression* | |
3382 | script_exp_function_origin(void* closurev, const char* name, size_t namelen) | |
3383 | { | |
3384 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3385 | Script_sections* ss = closure->script_options()->script_sections(); | |
3386 | Expression* origin = ss->find_memory_region_origin(name, namelen); | |
3387 | ||
3388 | if (origin == NULL) | |
3389 | { | |
3390 | gold_error(_("undefined memory region '%s' referenced " | |
3391 | "in ORIGIN expression"), | |
3392 | name); | |
3393 | // Create a dummy expression to prevent crashes later on. | |
3394 | origin = script_exp_integer(0); | |
3395 | } | |
3396 | ||
3397 | return origin; | |
3398 | } | |
3399 | ||
3400 | extern "C" Expression* | |
3401 | script_exp_function_length(void* closurev, const char* name, size_t namelen) | |
3402 | { | |
3403 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3404 | Script_sections* ss = closure->script_options()->script_sections(); | |
3405 | Expression* length = ss->find_memory_region_length(name, namelen); | |
3406 | ||
3407 | if (length == NULL) | |
3408 | { | |
3409 | gold_error(_("undefined memory region '%s' referenced " | |
3410 | "in LENGTH expression"), | |
3411 | name); | |
3412 | // Create a dummy expression to prevent crashes later on. | |
3413 | length = script_exp_integer(0); | |
3414 | } | |
3415 | ||
3416 | return length; | |
3417 | } |