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dbe717ef ILT |
1 | // script.cc -- handle linker scripts for gold. |
2 | ||
03ef7571 | 3 | // Copyright 2006, 2007, 2008, 2009, 2010, 2011 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; |
919ed24c | 983 | uint64_t final_val = this->val_->eval_maybe_dot(symtab, layout, true, |
a445fddf | 984 | is_dot_available, |
77e65537 | 985 | dot_value, dot_section, |
286adcf4 | 986 | §ion, NULL, false); |
494e05f4 | 987 | Sized_symbol<size>* ssym = symtab->get_sized_symbol<size>(this->sym_); |
a445fddf | 988 | ssym->set_value(final_val); |
77e65537 ILT |
989 | if (section != NULL) |
990 | ssym->set_output_section(section); | |
a445fddf ILT |
991 | } |
992 | ||
286adcf4 CC |
993 | // Set the symbol value if the expression yields an absolute value or |
994 | // a value relative to DOT_SECTION. | |
a445fddf ILT |
995 | |
996 | void | |
997 | Symbol_assignment::set_if_absolute(Symbol_table* symtab, const Layout* layout, | |
286adcf4 CC |
998 | bool is_dot_available, uint64_t dot_value, |
999 | Output_section* dot_section) | |
a445fddf ILT |
1000 | { |
1001 | if (this->sym_ == NULL) | |
1002 | return; | |
1003 | ||
77e65537 | 1004 | Output_section* val_section; |
919ed24c ILT |
1005 | uint64_t val = this->val_->eval_maybe_dot(symtab, layout, false, |
1006 | is_dot_available, dot_value, | |
286adcf4 CC |
1007 | dot_section, &val_section, NULL, |
1008 | false); | |
1009 | if (val_section != NULL && val_section != dot_section) | |
a445fddf ILT |
1010 | return; |
1011 | ||
8851ecca | 1012 | if (parameters->target().get_size() == 32) |
a445fddf ILT |
1013 | { |
1014 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
1015 | Sized_symbol<32>* ssym = symtab->get_sized_symbol<32>(this->sym_); | |
1016 | ssym->set_value(val); | |
1017 | #else | |
1018 | gold_unreachable(); | |
1019 | #endif | |
1020 | } | |
8851ecca | 1021 | else if (parameters->target().get_size() == 64) |
a445fddf ILT |
1022 | { |
1023 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
1024 | Sized_symbol<64>* ssym = symtab->get_sized_symbol<64>(this->sym_); | |
1025 | ssym->set_value(val); | |
1026 | #else | |
1027 | gold_unreachable(); | |
1028 | #endif | |
1029 | } | |
1030 | else | |
1031 | gold_unreachable(); | |
286adcf4 CC |
1032 | if (val_section != NULL) |
1033 | this->sym_->set_output_section(val_section); | |
494e05f4 ILT |
1034 | } |
1035 | ||
1036 | // Print for debugging. | |
1037 | ||
1038 | void | |
1039 | Symbol_assignment::print(FILE* f) const | |
1040 | { | |
1041 | if (this->provide_ && this->hidden_) | |
1042 | fprintf(f, "PROVIDE_HIDDEN("); | |
1043 | else if (this->provide_) | |
1044 | fprintf(f, "PROVIDE("); | |
1045 | else if (this->hidden_) | |
1046 | gold_unreachable(); | |
1047 | ||
1048 | fprintf(f, "%s = ", this->name_.c_str()); | |
1049 | this->val_->print(f); | |
1050 | ||
1051 | if (this->provide_ || this->hidden_) | |
1052 | fprintf(f, ")"); | |
1053 | ||
1054 | fprintf(f, "\n"); | |
1055 | } | |
1056 | ||
1057 | // Class Script_assertion. | |
1058 | ||
1059 | // Check the assertion. | |
1060 | ||
1061 | void | |
1062 | Script_assertion::check(const Symbol_table* symtab, const Layout* layout) | |
1063 | { | |
919ed24c | 1064 | if (!this->check_->eval(symtab, layout, true)) |
494e05f4 ILT |
1065 | gold_error("%s", this->message_.c_str()); |
1066 | } | |
1067 | ||
1068 | // Print for debugging. | |
1069 | ||
1070 | void | |
1071 | Script_assertion::print(FILE* f) const | |
1072 | { | |
1073 | fprintf(f, "ASSERT("); | |
1074 | this->check_->print(f); | |
1075 | fprintf(f, ", \"%s\")\n", this->message_.c_str()); | |
1076 | } | |
1077 | ||
1078 | // Class Script_options. | |
1079 | ||
1080 | Script_options::Script_options() | |
88a4108b ILT |
1081 | : entry_(), symbol_assignments_(), symbol_definitions_(), |
1082 | symbol_references_(), version_script_info_(), script_sections_() | |
494e05f4 ILT |
1083 | { |
1084 | } | |
1085 | ||
e597fa08 NC |
1086 | // Returns true if NAME is on the list of symbol assignments waiting |
1087 | // to be processed. | |
1088 | ||
1089 | bool | |
1090 | Script_options::is_pending_assignment(const char* name) | |
1091 | { | |
1092 | for (Symbol_assignments::iterator p = this->symbol_assignments_.begin(); | |
1093 | p != this->symbol_assignments_.end(); | |
1094 | ++p) | |
1095 | if ((*p)->name() == name) | |
1096 | return true; | |
1097 | return false; | |
1098 | } | |
1099 | ||
494e05f4 ILT |
1100 | // Add a symbol to be defined. |
1101 | ||
1102 | void | |
1103 | Script_options::add_symbol_assignment(const char* name, size_t length, | |
99fff23b ILT |
1104 | bool is_defsym, Expression* value, |
1105 | bool provide, bool hidden) | |
494e05f4 | 1106 | { |
a445fddf ILT |
1107 | if (length != 1 || name[0] != '.') |
1108 | { | |
1109 | if (this->script_sections_.in_sections_clause()) | |
a445fddf | 1110 | { |
99fff23b ILT |
1111 | gold_assert(!is_defsym); |
1112 | this->script_sections_.add_symbol_assignment(name, length, value, | |
a445fddf | 1113 | provide, hidden); |
99fff23b ILT |
1114 | } |
1115 | else | |
1116 | { | |
1117 | Symbol_assignment* p = new Symbol_assignment(name, length, is_defsym, | |
1118 | value, provide, hidden); | |
a445fddf ILT |
1119 | this->symbol_assignments_.push_back(p); |
1120 | } | |
88a4108b ILT |
1121 | |
1122 | if (!provide) | |
1123 | { | |
1124 | std::string n(name, length); | |
1125 | this->symbol_definitions_.insert(n); | |
1126 | this->symbol_references_.erase(n); | |
1127 | } | |
a445fddf | 1128 | } |
494e05f4 ILT |
1129 | else |
1130 | { | |
a445fddf ILT |
1131 | if (provide || hidden) |
1132 | gold_error(_("invalid use of PROVIDE for dot symbol")); | |
12edd763 ILT |
1133 | |
1134 | // The GNU linker permits assignments to dot outside of SECTIONS | |
1135 | // clauses and treats them as occurring inside, so we don't | |
1136 | // check in_sections_clause here. | |
1137 | this->script_sections_.add_dot_assignment(value); | |
494e05f4 ILT |
1138 | } |
1139 | } | |
1140 | ||
88a4108b ILT |
1141 | // Add a reference to a symbol. |
1142 | ||
1143 | void | |
1144 | Script_options::add_symbol_reference(const char* name, size_t length) | |
1145 | { | |
1146 | if (length != 1 || name[0] != '.') | |
1147 | { | |
1148 | std::string n(name, length); | |
1149 | if (this->symbol_definitions_.find(n) == this->symbol_definitions_.end()) | |
1150 | this->symbol_references_.insert(n); | |
1151 | } | |
1152 | } | |
1153 | ||
494e05f4 ILT |
1154 | // Add an assertion. |
1155 | ||
1156 | void | |
1157 | Script_options::add_assertion(Expression* check, const char* message, | |
1158 | size_t messagelen) | |
1159 | { | |
1160 | if (this->script_sections_.in_sections_clause()) | |
1161 | this->script_sections_.add_assertion(check, message, messagelen); | |
1162 | else | |
1163 | { | |
1164 | Script_assertion* p = new Script_assertion(check, message, messagelen); | |
1165 | this->assertions_.push_back(p); | |
1166 | } | |
1167 | } | |
1168 | ||
919ed24c ILT |
1169 | // Create sections required by any linker scripts. |
1170 | ||
1171 | void | |
1172 | Script_options::create_script_sections(Layout* layout) | |
1173 | { | |
1174 | if (this->saw_sections_clause()) | |
1175 | this->script_sections_.create_sections(layout); | |
1176 | } | |
1177 | ||
494e05f4 ILT |
1178 | // Add any symbols we are defining to the symbol table. |
1179 | ||
1180 | void | |
9b07f471 | 1181 | Script_options::add_symbols_to_table(Symbol_table* symtab) |
e5756efb ILT |
1182 | { |
1183 | for (Symbol_assignments::iterator p = this->symbol_assignments_.begin(); | |
1184 | p != this->symbol_assignments_.end(); | |
1185 | ++p) | |
9b07f471 | 1186 | (*p)->add_to_table(symtab); |
a445fddf | 1187 | this->script_sections_.add_symbols_to_table(symtab); |
494e05f4 ILT |
1188 | } |
1189 | ||
a445fddf | 1190 | // Finalize symbol values. Also check assertions. |
494e05f4 ILT |
1191 | |
1192 | void | |
1193 | Script_options::finalize_symbols(Symbol_table* symtab, const Layout* layout) | |
1194 | { | |
7c07ecec ILT |
1195 | // We finalize the symbols defined in SECTIONS first, because they |
1196 | // are the ones which may have changed. This way if symbol outside | |
1197 | // SECTIONS are defined in terms of symbols inside SECTIONS, they | |
1198 | // will get the right value. | |
1199 | this->script_sections_.finalize_symbols(symtab, layout); | |
1200 | ||
494e05f4 ILT |
1201 | for (Symbol_assignments::iterator p = this->symbol_assignments_.begin(); |
1202 | p != this->symbol_assignments_.end(); | |
1203 | ++p) | |
1204 | (*p)->finalize(symtab, layout); | |
a445fddf ILT |
1205 | |
1206 | for (Assertions::iterator p = this->assertions_.begin(); | |
1207 | p != this->assertions_.end(); | |
1208 | ++p) | |
1209 | (*p)->check(symtab, layout); | |
a445fddf ILT |
1210 | } |
1211 | ||
1212 | // Set section addresses. We set all the symbols which have absolute | |
1213 | // values. Then we let the SECTIONS clause do its thing. This | |
1214 | // returns the segment which holds the file header and segment | |
1215 | // headers, if any. | |
1216 | ||
1217 | Output_segment* | |
1218 | Script_options::set_section_addresses(Symbol_table* symtab, Layout* layout) | |
1219 | { | |
1220 | for (Symbol_assignments::iterator p = this->symbol_assignments_.begin(); | |
1221 | p != this->symbol_assignments_.end(); | |
1222 | ++p) | |
286adcf4 | 1223 | (*p)->set_if_absolute(symtab, layout, false, 0, NULL); |
a445fddf ILT |
1224 | |
1225 | return this->script_sections_.set_section_addresses(symtab, layout); | |
e5756efb ILT |
1226 | } |
1227 | ||
dbe717ef ILT |
1228 | // This class holds data passed through the parser to the lexer and to |
1229 | // the parser support functions. This avoids global variables. We | |
17a1d0a9 ILT |
1230 | // can't use global variables because we need not be called by a |
1231 | // singleton thread. | |
dbe717ef ILT |
1232 | |
1233 | class Parser_closure | |
1234 | { | |
1235 | public: | |
2ea97941 | 1236 | Parser_closure(const char* filename, |
dbe717ef | 1237 | const Position_dependent_options& posdep_options, |
99fff23b | 1238 | bool parsing_defsym, bool in_group, bool is_in_sysroot, |
2ea97941 ILT |
1239 | Command_line* command_line, |
1240 | Script_options* script_options, | |
15f8229b | 1241 | Lex* lex, |
c7975edd CC |
1242 | bool skip_on_incompatible_target, |
1243 | Script_info* script_info) | |
2ea97941 | 1244 | : filename_(filename), posdep_options_(posdep_options), |
99fff23b ILT |
1245 | parsing_defsym_(parsing_defsym), in_group_(in_group), |
1246 | is_in_sysroot_(is_in_sysroot), | |
2ea97941 | 1247 | skip_on_incompatible_target_(skip_on_incompatible_target), |
15f8229b | 1248 | found_incompatible_target_(false), |
2ea97941 ILT |
1249 | command_line_(command_line), script_options_(script_options), |
1250 | version_script_info_(script_options->version_script_info()), | |
c7975edd CC |
1251 | lex_(lex), lineno_(0), charpos_(0), lex_mode_stack_(), inputs_(NULL), |
1252 | script_info_(script_info) | |
c82fbeee | 1253 | { |
09124467 | 1254 | // We start out processing C symbols in the default lex mode. |
6affe781 ILT |
1255 | this->language_stack_.push_back(Version_script_info::LANGUAGE_C); |
1256 | this->lex_mode_stack_.push_back(lex->mode()); | |
09124467 | 1257 | } |
dbe717ef ILT |
1258 | |
1259 | // Return the file name. | |
1260 | const char* | |
1261 | filename() const | |
1262 | { return this->filename_; } | |
1263 | ||
1264 | // Return the position dependent options. The caller may modify | |
1265 | // this. | |
1266 | Position_dependent_options& | |
1267 | position_dependent_options() | |
1268 | { return this->posdep_options_; } | |
1269 | ||
99fff23b ILT |
1270 | // Whether we are parsing a --defsym. |
1271 | bool | |
1272 | parsing_defsym() const | |
1273 | { return this->parsing_defsym_; } | |
1274 | ||
dbe717ef ILT |
1275 | // Return whether this script is being run in a group. |
1276 | bool | |
1277 | in_group() const | |
1278 | { return this->in_group_; } | |
1279 | ||
ad2d6943 ILT |
1280 | // Return whether this script was found using a directory in the |
1281 | // sysroot. | |
1282 | bool | |
1283 | is_in_sysroot() const | |
1284 | { return this->is_in_sysroot_; } | |
1285 | ||
15f8229b ILT |
1286 | // Whether to skip to the next file with the same name if we find an |
1287 | // incompatible target in an OUTPUT_FORMAT statement. | |
1288 | bool | |
1289 | skip_on_incompatible_target() const | |
1290 | { return this->skip_on_incompatible_target_; } | |
1291 | ||
e6a307ba | 1292 | // Stop skipping to the next file on an incompatible target. This |
15f8229b ILT |
1293 | // is called when we make some unrevocable change to the data |
1294 | // structures. | |
1295 | void | |
1296 | clear_skip_on_incompatible_target() | |
1297 | { this->skip_on_incompatible_target_ = false; } | |
1298 | ||
1299 | // Whether we found an incompatible target in an OUTPUT_FORMAT | |
1300 | // statement. | |
1301 | bool | |
1302 | found_incompatible_target() const | |
1303 | { return this->found_incompatible_target_; } | |
1304 | ||
1305 | // Note that we found an incompatible target. | |
1306 | void | |
1307 | set_found_incompatible_target() | |
1308 | { this->found_incompatible_target_ = true; } | |
1309 | ||
a0451b38 ILT |
1310 | // Returns the Command_line structure passed in at constructor time. |
1311 | // This value may be NULL. The caller may modify this, which modifies | |
1312 | // the passed-in Command_line object (not a copy). | |
e5756efb ILT |
1313 | Command_line* |
1314 | command_line() | |
a0451b38 ILT |
1315 | { return this->command_line_; } |
1316 | ||
e5756efb ILT |
1317 | // Return the options which may be set by a script. |
1318 | Script_options* | |
1319 | script_options() | |
1320 | { return this->script_options_; } | |
dbe717ef | 1321 | |
09124467 ILT |
1322 | // Return the object in which version script information should be stored. |
1323 | Version_script_info* | |
1324 | version_script() | |
1325 | { return this->version_script_info_; } | |
1326 | ||
2dd3e587 | 1327 | // Return the next token, and advance. |
dbe717ef ILT |
1328 | const Token* |
1329 | next_token() | |
1330 | { | |
e5756efb ILT |
1331 | const Token* token = this->lex_->next_token(); |
1332 | this->lineno_ = token->lineno(); | |
1333 | this->charpos_ = token->charpos(); | |
1334 | return token; | |
dbe717ef ILT |
1335 | } |
1336 | ||
e5756efb ILT |
1337 | // Set a new lexer mode, pushing the current one. |
1338 | void | |
1339 | push_lex_mode(Lex::Mode mode) | |
1340 | { | |
1341 | this->lex_mode_stack_.push_back(this->lex_->mode()); | |
1342 | this->lex_->set_mode(mode); | |
1343 | } | |
1344 | ||
1345 | // Pop the lexer mode. | |
1346 | void | |
1347 | pop_lex_mode() | |
2dd3e587 | 1348 | { |
e5756efb ILT |
1349 | gold_assert(!this->lex_mode_stack_.empty()); |
1350 | this->lex_->set_mode(this->lex_mode_stack_.back()); | |
1351 | this->lex_mode_stack_.pop_back(); | |
2dd3e587 ILT |
1352 | } |
1353 | ||
09124467 ILT |
1354 | // Return the current lexer mode. |
1355 | Lex::Mode | |
1356 | lex_mode() const | |
1357 | { return this->lex_mode_stack_.back(); } | |
1358 | ||
e5756efb ILT |
1359 | // Return the line number of the last token. |
1360 | int | |
1361 | lineno() const | |
1362 | { return this->lineno_; } | |
1363 | ||
1364 | // Return the character position in the line of the last token. | |
1365 | int | |
1366 | charpos() const | |
1367 | { return this->charpos_; } | |
1368 | ||
dbe717ef ILT |
1369 | // Return the list of input files, creating it if necessary. This |
1370 | // is a space leak--we never free the INPUTS_ pointer. | |
1371 | Input_arguments* | |
1372 | inputs() | |
1373 | { | |
1374 | if (this->inputs_ == NULL) | |
1375 | this->inputs_ = new Input_arguments(); | |
1376 | return this->inputs_; | |
1377 | } | |
1378 | ||
1379 | // Return whether we saw any input files. | |
1380 | bool | |
1381 | saw_inputs() const | |
1382 | { return this->inputs_ != NULL && !this->inputs_->empty(); } | |
1383 | ||
09124467 ILT |
1384 | // Return the current language being processed in a version script |
1385 | // (eg, "C++"). The empty string represents unmangled C names. | |
6affe781 | 1386 | Version_script_info::Language |
09124467 ILT |
1387 | get_current_language() const |
1388 | { return this->language_stack_.back(); } | |
1389 | ||
1390 | // Push a language onto the stack when entering an extern block. | |
6affe781 ILT |
1391 | void |
1392 | push_language(Version_script_info::Language lang) | |
09124467 ILT |
1393 | { this->language_stack_.push_back(lang); } |
1394 | ||
1395 | // Pop a language off of the stack when exiting an extern block. | |
6affe781 ILT |
1396 | void |
1397 | pop_language() | |
09124467 ILT |
1398 | { |
1399 | gold_assert(!this->language_stack_.empty()); | |
1400 | this->language_stack_.pop_back(); | |
1401 | } | |
1402 | ||
c7975edd CC |
1403 | // Return a pointer to the incremental info. |
1404 | Script_info* | |
1405 | script_info() | |
1406 | { return this->script_info_; } | |
1407 | ||
dbe717ef ILT |
1408 | private: |
1409 | // The name of the file we are reading. | |
1410 | const char* filename_; | |
1411 | // The position dependent options. | |
1412 | Position_dependent_options posdep_options_; | |
99fff23b ILT |
1413 | // True if we are parsing a --defsym. |
1414 | bool parsing_defsym_; | |
dbe717ef ILT |
1415 | // Whether we are currently in a --start-group/--end-group. |
1416 | bool in_group_; | |
ad2d6943 ILT |
1417 | // Whether the script was found in a sysrooted directory. |
1418 | bool is_in_sysroot_; | |
15f8229b ILT |
1419 | // If this is true, then if we find an OUTPUT_FORMAT with an |
1420 | // incompatible target, then we tell the parser to abort so that we | |
1421 | // can search for the next file with the same name. | |
1422 | bool skip_on_incompatible_target_; | |
1423 | // True if we found an OUTPUT_FORMAT with an incompatible target. | |
1424 | bool found_incompatible_target_; | |
a0451b38 ILT |
1425 | // May be NULL if the user chooses not to pass one in. |
1426 | Command_line* command_line_; | |
e5756efb ILT |
1427 | // Options which may be set from any linker script. |
1428 | Script_options* script_options_; | |
09124467 ILT |
1429 | // Information parsed from a version script. |
1430 | Version_script_info* version_script_info_; | |
e5756efb ILT |
1431 | // The lexer. |
1432 | Lex* lex_; | |
1433 | // The line number of the last token returned by next_token. | |
1434 | int lineno_; | |
1435 | // The column number of the last token returned by next_token. | |
1436 | int charpos_; | |
1437 | // A stack of lexer modes. | |
1438 | std::vector<Lex::Mode> lex_mode_stack_; | |
09124467 ILT |
1439 | // A stack of which extern/language block we're inside. Can be C++, |
1440 | // java, or empty for C. | |
6affe781 | 1441 | std::vector<Version_script_info::Language> language_stack_; |
dbe717ef ILT |
1442 | // New input files found to add to the link. |
1443 | Input_arguments* inputs_; | |
c7975edd CC |
1444 | // Pointer to incremental linking info. |
1445 | Script_info* script_info_; | |
dbe717ef ILT |
1446 | }; |
1447 | ||
1448 | // FILE was found as an argument on the command line. Try to read it | |
da769d56 | 1449 | // as a script. Return true if the file was handled. |
dbe717ef ILT |
1450 | |
1451 | bool | |
f1ed28fb | 1452 | read_input_script(Workqueue* workqueue, Symbol_table* symtab, Layout* layout, |
15f8229b ILT |
1453 | Dirsearch* dirsearch, int dirindex, |
1454 | Input_objects* input_objects, Mapfile* mapfile, | |
1455 | Input_group* input_group, | |
dbe717ef | 1456 | const Input_argument* input_argument, |
da769d56 ILT |
1457 | Input_file* input_file, Task_token* next_blocker, |
1458 | bool* used_next_blocker) | |
dbe717ef | 1459 | { |
da769d56 ILT |
1460 | *used_next_blocker = false; |
1461 | ||
e5756efb ILT |
1462 | std::string input_string; |
1463 | Lex::read_file(input_file, &input_string); | |
1464 | ||
1465 | Lex lex(input_string.c_str(), input_string.length(), PARSING_LINKER_SCRIPT); | |
dbe717ef | 1466 | |
c7975edd CC |
1467 | Script_info* script_info = NULL; |
1468 | if (layout->incremental_inputs() != NULL) | |
1469 | { | |
1470 | const std::string& filename = input_file->filename(); | |
1471 | Timespec mtime = input_file->file().get_mtime(); | |
cdc29364 CC |
1472 | unsigned int arg_serial = input_argument->file().arg_serial(); |
1473 | script_info = new Script_info(filename); | |
1474 | layout->incremental_inputs()->report_script(script_info, arg_serial, | |
1475 | mtime); | |
c7975edd CC |
1476 | } |
1477 | ||
dbe717ef ILT |
1478 | Parser_closure closure(input_file->filename().c_str(), |
1479 | input_argument->file().options(), | |
99fff23b | 1480 | false, |
dbe717ef | 1481 | input_group != NULL, |
ad2d6943 | 1482 | input_file->is_in_sysroot(), |
a0451b38 | 1483 | NULL, |
e5756efb | 1484 | layout->script_options(), |
15f8229b | 1485 | &lex, |
c7975edd CC |
1486 | input_file->will_search_for(), |
1487 | script_info); | |
dbe717ef | 1488 | |
d7bb5745 ILT |
1489 | bool old_saw_sections_clause = |
1490 | layout->script_options()->saw_sections_clause(); | |
1491 | ||
dbe717ef | 1492 | if (yyparse(&closure) != 0) |
15f8229b ILT |
1493 | { |
1494 | if (closure.found_incompatible_target()) | |
1495 | { | |
1496 | Read_symbols::incompatible_warning(input_argument, input_file); | |
1497 | Read_symbols::requeue(workqueue, input_objects, symtab, layout, | |
1498 | dirsearch, dirindex, mapfile, input_argument, | |
1499 | input_group, next_blocker); | |
1500 | return true; | |
1501 | } | |
1502 | return false; | |
1503 | } | |
dbe717ef | 1504 | |
d7bb5745 ILT |
1505 | if (!old_saw_sections_clause |
1506 | && layout->script_options()->saw_sections_clause() | |
1507 | && layout->have_added_input_section()) | |
1508 | gold_error(_("%s: SECTIONS seen after other input files; try -T/--script"), | |
1509 | input_file->filename().c_str()); | |
1510 | ||
dbe717ef | 1511 | if (!closure.saw_inputs()) |
da769d56 | 1512 | return true; |
dbe717ef | 1513 | |
da769d56 | 1514 | Task_token* this_blocker = NULL; |
dbe717ef ILT |
1515 | for (Input_arguments::const_iterator p = closure.inputs()->begin(); |
1516 | p != closure.inputs()->end(); | |
1517 | ++p) | |
1518 | { | |
1519 | Task_token* nb; | |
1520 | if (p + 1 == closure.inputs()->end()) | |
1521 | nb = next_blocker; | |
1522 | else | |
1523 | { | |
17a1d0a9 | 1524 | nb = new Task_token(true); |
dbe717ef ILT |
1525 | nb->add_blocker(); |
1526 | } | |
f1ed28fb | 1527 | workqueue->queue_soon(new Read_symbols(input_objects, symtab, |
15f8229b | 1528 | layout, dirsearch, 0, mapfile, &*p, |
b0193076 | 1529 | input_group, NULL, this_blocker, nb)); |
dbe717ef ILT |
1530 | this_blocker = nb; |
1531 | } | |
1532 | ||
da769d56 ILT |
1533 | *used_next_blocker = true; |
1534 | ||
dbe717ef ILT |
1535 | return true; |
1536 | } | |
1537 | ||
628f39be SA |
1538 | // Helper function for read_version_script(), read_commandline_script() and |
1539 | // script_include_directive(). Processes the given file in the mode indicated | |
1540 | // by first_token and lex_mode. | |
3c2fafa5 | 1541 | |
09124467 ILT |
1542 | static bool |
1543 | read_script_file(const char* filename, Command_line* cmdline, | |
c82fbeee | 1544 | Script_options* script_options, |
09124467 | 1545 | int first_token, Lex::Mode lex_mode) |
3c2fafa5 | 1546 | { |
3c2fafa5 | 1547 | Dirsearch dirsearch; |
628f39be SA |
1548 | std::string name = filename; |
1549 | ||
1550 | // If filename is a relative filename, search for it manually using "." + | |
1551 | // cmdline->options()->library_path() -- not dirsearch. | |
1552 | if (!IS_ABSOLUTE_PATH(filename)) | |
1553 | { | |
1554 | const General_options::Dir_list& search_path = | |
1555 | cmdline->options().library_path(); | |
1556 | name = Dirsearch::find_file_in_dir_list(name, search_path, "."); | |
1557 | } | |
3c2fafa5 | 1558 | |
17a1d0a9 ILT |
1559 | // The file locking code wants to record a Task, but we haven't |
1560 | // started the workqueue yet. This is only for debugging purposes, | |
1561 | // so we invent a fake value. | |
1562 | const Task* task = reinterpret_cast<const Task*>(-1); | |
1563 | ||
b0d8593d ILT |
1564 | // We don't want this file to be opened in binary mode. |
1565 | Position_dependent_options posdep = cmdline->position_dependent_options(); | |
7cc619c3 ILT |
1566 | if (posdep.format_enum() == General_options::OBJECT_FORMAT_BINARY) |
1567 | posdep.set_format_enum(General_options::OBJECT_FORMAT_ELF); | |
628f39be | 1568 | Input_file_argument input_argument(name.c_str(), |
ae3b5189 CD |
1569 | Input_file_argument::INPUT_FILE_TYPE_FILE, |
1570 | "", false, posdep); | |
3c2fafa5 | 1571 | Input_file input_file(&input_argument); |
15f8229b ILT |
1572 | int dummy = 0; |
1573 | if (!input_file.open(dirsearch, task, &dummy)) | |
3c2fafa5 ILT |
1574 | return false; |
1575 | ||
e5756efb ILT |
1576 | std::string input_string; |
1577 | Lex::read_file(&input_file, &input_string); | |
1578 | ||
09124467 ILT |
1579 | Lex lex(input_string.c_str(), input_string.length(), first_token); |
1580 | lex.set_mode(lex_mode); | |
3c2fafa5 ILT |
1581 | |
1582 | Parser_closure closure(filename, | |
1583 | cmdline->position_dependent_options(), | |
99fff23b | 1584 | first_token == Lex::DYNAMIC_LIST, |
3c2fafa5 ILT |
1585 | false, |
1586 | input_file.is_in_sysroot(), | |
a0451b38 | 1587 | cmdline, |
c82fbeee | 1588 | script_options, |
15f8229b | 1589 | &lex, |
c7975edd CC |
1590 | false, |
1591 | NULL); | |
3c2fafa5 ILT |
1592 | if (yyparse(&closure) != 0) |
1593 | { | |
17a1d0a9 | 1594 | input_file.file().unlock(task); |
3c2fafa5 ILT |
1595 | return false; |
1596 | } | |
1597 | ||
17a1d0a9 | 1598 | input_file.file().unlock(task); |
d391083d ILT |
1599 | |
1600 | gold_assert(!closure.saw_inputs()); | |
1601 | ||
3c2fafa5 ILT |
1602 | return true; |
1603 | } | |
1604 | ||
09124467 ILT |
1605 | // FILENAME was found as an argument to --script (-T). |
1606 | // Read it as a script, and execute its contents immediately. | |
1607 | ||
1608 | bool | |
1609 | read_commandline_script(const char* filename, Command_line* cmdline) | |
1610 | { | |
c82fbeee | 1611 | return read_script_file(filename, cmdline, &cmdline->script_options(), |
09124467 ILT |
1612 | PARSING_LINKER_SCRIPT, Lex::LINKER_SCRIPT); |
1613 | } | |
1614 | ||
c82fbeee CS |
1615 | // FILENAME was found as an argument to --version-script. Read it as |
1616 | // a version script, and store its contents in | |
09124467 ILT |
1617 | // cmdline->script_options()->version_script_info(). |
1618 | ||
1619 | bool | |
1620 | read_version_script(const char* filename, Command_line* cmdline) | |
1621 | { | |
c82fbeee | 1622 | return read_script_file(filename, cmdline, &cmdline->script_options(), |
09124467 ILT |
1623 | PARSING_VERSION_SCRIPT, Lex::VERSION_SCRIPT); |
1624 | } | |
1625 | ||
c82fbeee CS |
1626 | // FILENAME was found as an argument to --dynamic-list. Read it as a |
1627 | // list of symbols, and store its contents in DYNAMIC_LIST. | |
1628 | ||
1629 | bool | |
1630 | read_dynamic_list(const char* filename, Command_line* cmdline, | |
1631 | Script_options* dynamic_list) | |
1632 | { | |
1633 | return read_script_file(filename, cmdline, dynamic_list, | |
1634 | PARSING_DYNAMIC_LIST, Lex::DYNAMIC_LIST); | |
1635 | } | |
1636 | ||
e5756efb ILT |
1637 | // Implement the --defsym option on the command line. Return true if |
1638 | // all is well. | |
1639 | ||
1640 | bool | |
1641 | Script_options::define_symbol(const char* definition) | |
1642 | { | |
1643 | Lex lex(definition, strlen(definition), PARSING_DEFSYM); | |
1644 | lex.set_mode(Lex::EXPRESSION); | |
1645 | ||
1646 | // Dummy value. | |
1647 | Position_dependent_options posdep_options; | |
1648 | ||
99fff23b | 1649 | Parser_closure closure("command line", posdep_options, true, |
c7975edd | 1650 | false, false, NULL, this, &lex, false, NULL); |
e5756efb ILT |
1651 | |
1652 | if (yyparse(&closure) != 0) | |
1653 | return false; | |
1654 | ||
1655 | gold_assert(!closure.saw_inputs()); | |
1656 | ||
1657 | return true; | |
1658 | } | |
1659 | ||
494e05f4 ILT |
1660 | // Print the script to F for debugging. |
1661 | ||
1662 | void | |
1663 | Script_options::print(FILE* f) const | |
1664 | { | |
1665 | fprintf(f, "%s: Dumping linker script\n", program_name); | |
1666 | ||
1667 | if (!this->entry_.empty()) | |
1668 | fprintf(f, "ENTRY(%s)\n", this->entry_.c_str()); | |
1669 | ||
1670 | for (Symbol_assignments::const_iterator p = | |
1671 | this->symbol_assignments_.begin(); | |
1672 | p != this->symbol_assignments_.end(); | |
1673 | ++p) | |
1674 | (*p)->print(f); | |
1675 | ||
1676 | for (Assertions::const_iterator p = this->assertions_.begin(); | |
1677 | p != this->assertions_.end(); | |
1678 | ++p) | |
1679 | (*p)->print(f); | |
1680 | ||
1681 | this->script_sections_.print(f); | |
1682 | ||
1683 | this->version_script_info_.print(f); | |
1684 | } | |
1685 | ||
dbe717ef | 1686 | // Manage mapping from keywords to the codes expected by the bison |
09124467 ILT |
1687 | // parser. We construct one global object for each lex mode with |
1688 | // keywords. | |
dbe717ef ILT |
1689 | |
1690 | class Keyword_to_parsecode | |
1691 | { | |
1692 | public: | |
1693 | // The structure which maps keywords to parsecodes. | |
1694 | struct Keyword_parsecode | |
1695 | { | |
1696 | // Keyword. | |
1697 | const char* keyword; | |
1698 | // Corresponding parsecode. | |
1699 | int parsecode; | |
1700 | }; | |
1701 | ||
09124467 ILT |
1702 | Keyword_to_parsecode(const Keyword_parsecode* keywords, |
1703 | int keyword_count) | |
1704 | : keyword_parsecodes_(keywords), keyword_count_(keyword_count) | |
1705 | { } | |
1706 | ||
dbe717ef ILT |
1707 | // Return the parsecode corresponding KEYWORD, or 0 if it is not a |
1708 | // keyword. | |
09124467 ILT |
1709 | int |
1710 | keyword_to_parsecode(const char* keyword, size_t len) const; | |
dbe717ef ILT |
1711 | |
1712 | private: | |
09124467 ILT |
1713 | const Keyword_parsecode* keyword_parsecodes_; |
1714 | const int keyword_count_; | |
dbe717ef ILT |
1715 | }; |
1716 | ||
1717 | // Mapping from keyword string to keyword parsecode. This array must | |
1718 | // be kept in sorted order. Parsecodes are looked up using bsearch. | |
1719 | // This array must correspond to the list of parsecodes in yyscript.y. | |
1720 | ||
09124467 ILT |
1721 | static const Keyword_to_parsecode::Keyword_parsecode |
1722 | script_keyword_parsecodes[] = | |
dbe717ef ILT |
1723 | { |
1724 | { "ABSOLUTE", ABSOLUTE }, | |
1725 | { "ADDR", ADDR }, | |
1726 | { "ALIGN", ALIGN_K }, | |
e5756efb | 1727 | { "ALIGNOF", ALIGNOF }, |
dbe717ef ILT |
1728 | { "ASSERT", ASSERT_K }, |
1729 | { "AS_NEEDED", AS_NEEDED }, | |
1730 | { "AT", AT }, | |
1731 | { "BIND", BIND }, | |
1732 | { "BLOCK", BLOCK }, | |
1733 | { "BYTE", BYTE }, | |
1734 | { "CONSTANT", CONSTANT }, | |
1735 | { "CONSTRUCTORS", CONSTRUCTORS }, | |
1e5d2fb1 | 1736 | { "COPY", COPY }, |
dbe717ef ILT |
1737 | { "CREATE_OBJECT_SYMBOLS", CREATE_OBJECT_SYMBOLS }, |
1738 | { "DATA_SEGMENT_ALIGN", DATA_SEGMENT_ALIGN }, | |
1739 | { "DATA_SEGMENT_END", DATA_SEGMENT_END }, | |
1740 | { "DATA_SEGMENT_RELRO_END", DATA_SEGMENT_RELRO_END }, | |
1741 | { "DEFINED", DEFINED }, | |
1e5d2fb1 | 1742 | { "DSECT", DSECT }, |
dbe717ef ILT |
1743 | { "ENTRY", ENTRY }, |
1744 | { "EXCLUDE_FILE", EXCLUDE_FILE }, | |
1745 | { "EXTERN", EXTERN }, | |
1746 | { "FILL", FILL }, | |
1747 | { "FLOAT", FLOAT }, | |
1748 | { "FORCE_COMMON_ALLOCATION", FORCE_COMMON_ALLOCATION }, | |
1749 | { "GROUP", GROUP }, | |
1750 | { "HLL", HLL }, | |
1751 | { "INCLUDE", INCLUDE }, | |
1e5d2fb1 | 1752 | { "INFO", INFO }, |
dbe717ef ILT |
1753 | { "INHIBIT_COMMON_ALLOCATION", INHIBIT_COMMON_ALLOCATION }, |
1754 | { "INPUT", INPUT }, | |
1755 | { "KEEP", KEEP }, | |
1756 | { "LENGTH", LENGTH }, | |
1757 | { "LOADADDR", LOADADDR }, | |
1758 | { "LONG", LONG }, | |
1759 | { "MAP", MAP }, | |
1760 | { "MAX", MAX_K }, | |
1761 | { "MEMORY", MEMORY }, | |
1762 | { "MIN", MIN_K }, | |
1763 | { "NEXT", NEXT }, | |
1764 | { "NOCROSSREFS", NOCROSSREFS }, | |
1765 | { "NOFLOAT", NOFLOAT }, | |
1e5d2fb1 | 1766 | { "NOLOAD", NOLOAD }, |
dbe717ef ILT |
1767 | { "ONLY_IF_RO", ONLY_IF_RO }, |
1768 | { "ONLY_IF_RW", ONLY_IF_RW }, | |
195e7dc6 | 1769 | { "OPTION", OPTION }, |
dbe717ef ILT |
1770 | { "ORIGIN", ORIGIN }, |
1771 | { "OUTPUT", OUTPUT }, | |
1772 | { "OUTPUT_ARCH", OUTPUT_ARCH }, | |
1773 | { "OUTPUT_FORMAT", OUTPUT_FORMAT }, | |
1774 | { "OVERLAY", OVERLAY }, | |
1775 | { "PHDRS", PHDRS }, | |
1776 | { "PROVIDE", PROVIDE }, | |
1777 | { "PROVIDE_HIDDEN", PROVIDE_HIDDEN }, | |
1778 | { "QUAD", QUAD }, | |
1779 | { "SEARCH_DIR", SEARCH_DIR }, | |
1780 | { "SECTIONS", SECTIONS }, | |
1781 | { "SEGMENT_START", SEGMENT_START }, | |
1782 | { "SHORT", SHORT }, | |
1783 | { "SIZEOF", SIZEOF }, | |
1784 | { "SIZEOF_HEADERS", SIZEOF_HEADERS }, | |
3802b2dd | 1785 | { "SORT", SORT_BY_NAME }, |
dbe717ef ILT |
1786 | { "SORT_BY_ALIGNMENT", SORT_BY_ALIGNMENT }, |
1787 | { "SORT_BY_NAME", SORT_BY_NAME }, | |
1788 | { "SPECIAL", SPECIAL }, | |
1789 | { "SQUAD", SQUAD }, | |
1790 | { "STARTUP", STARTUP }, | |
1791 | { "SUBALIGN", SUBALIGN }, | |
1792 | { "SYSLIB", SYSLIB }, | |
1793 | { "TARGET", TARGET_K }, | |
1794 | { "TRUNCATE", TRUNCATE }, | |
1795 | { "VERSION", VERSIONK }, | |
1796 | { "global", GLOBAL }, | |
1797 | { "l", LENGTH }, | |
1798 | { "len", LENGTH }, | |
1799 | { "local", LOCAL }, | |
1800 | { "o", ORIGIN }, | |
1801 | { "org", ORIGIN }, | |
1802 | { "sizeof_headers", SIZEOF_HEADERS }, | |
1803 | }; | |
1804 | ||
09124467 ILT |
1805 | static const Keyword_to_parsecode |
1806 | script_keywords(&script_keyword_parsecodes[0], | |
1807 | (sizeof(script_keyword_parsecodes) | |
1808 | / sizeof(script_keyword_parsecodes[0]))); | |
1809 | ||
1810 | static const Keyword_to_parsecode::Keyword_parsecode | |
1811 | version_script_keyword_parsecodes[] = | |
1812 | { | |
1813 | { "extern", EXTERN }, | |
1814 | { "global", GLOBAL }, | |
1815 | { "local", LOCAL }, | |
1816 | }; | |
1817 | ||
1818 | static const Keyword_to_parsecode | |
1819 | version_script_keywords(&version_script_keyword_parsecodes[0], | |
1820 | (sizeof(version_script_keyword_parsecodes) | |
1821 | / sizeof(version_script_keyword_parsecodes[0]))); | |
dbe717ef | 1822 | |
c82fbeee CS |
1823 | static const Keyword_to_parsecode::Keyword_parsecode |
1824 | dynamic_list_keyword_parsecodes[] = | |
1825 | { | |
1826 | { "extern", EXTERN }, | |
1827 | }; | |
1828 | ||
1829 | static const Keyword_to_parsecode | |
1830 | dynamic_list_keywords(&dynamic_list_keyword_parsecodes[0], | |
1831 | (sizeof(dynamic_list_keyword_parsecodes) | |
1832 | / sizeof(dynamic_list_keyword_parsecodes[0]))); | |
1833 | ||
1834 | ||
1835 | ||
dbe717ef ILT |
1836 | // Comparison function passed to bsearch. |
1837 | ||
1838 | extern "C" | |
1839 | { | |
1840 | ||
e5756efb ILT |
1841 | struct Ktt_key |
1842 | { | |
1843 | const char* str; | |
1844 | size_t len; | |
1845 | }; | |
1846 | ||
dbe717ef ILT |
1847 | static int |
1848 | ktt_compare(const void* keyv, const void* kttv) | |
1849 | { | |
e5756efb | 1850 | const Ktt_key* key = static_cast<const Ktt_key*>(keyv); |
dbe717ef ILT |
1851 | const Keyword_to_parsecode::Keyword_parsecode* ktt = |
1852 | static_cast<const Keyword_to_parsecode::Keyword_parsecode*>(kttv); | |
e5756efb ILT |
1853 | int i = strncmp(key->str, ktt->keyword, key->len); |
1854 | if (i != 0) | |
1855 | return i; | |
1856 | if (ktt->keyword[key->len] != '\0') | |
1857 | return -1; | |
1858 | return 0; | |
dbe717ef ILT |
1859 | } |
1860 | ||
1861 | } // End extern "C". | |
1862 | ||
1863 | int | |
09124467 ILT |
1864 | Keyword_to_parsecode::keyword_to_parsecode(const char* keyword, |
1865 | size_t len) const | |
dbe717ef | 1866 | { |
e5756efb ILT |
1867 | Ktt_key key; |
1868 | key.str = keyword; | |
1869 | key.len = len; | |
1870 | void* kttv = bsearch(&key, | |
09124467 ILT |
1871 | this->keyword_parsecodes_, |
1872 | this->keyword_count_, | |
1873 | sizeof(this->keyword_parsecodes_[0]), | |
1874 | ktt_compare); | |
dbe717ef ILT |
1875 | if (kttv == NULL) |
1876 | return 0; | |
1877 | Keyword_parsecode* ktt = static_cast<Keyword_parsecode*>(kttv); | |
1878 | return ktt->parsecode; | |
1879 | } | |
1880 | ||
494e05f4 ILT |
1881 | // The following structs are used within the VersionInfo class as well |
1882 | // as in the bison helper functions. They store the information | |
1883 | // parsed from the version script. | |
dbe717ef | 1884 | |
494e05f4 ILT |
1885 | // A single version expression. |
1886 | // For example, pattern="std::map*" and language="C++". | |
62dfdd4d | 1887 | struct Version_expression |
6affe781 ILT |
1888 | { |
1889 | Version_expression(const std::string& a_pattern, | |
1890 | Version_script_info::Language a_language, | |
1891 | bool a_exact_match) | |
62dfdd4d ILT |
1892 | : pattern(a_pattern), language(a_language), exact_match(a_exact_match), |
1893 | was_matched_by_symbol(false) | |
6affe781 | 1894 | { } |
dbe717ef | 1895 | |
494e05f4 | 1896 | std::string pattern; |
6affe781 | 1897 | Version_script_info::Language language; |
494e05f4 ILT |
1898 | // If false, we use glob() to match pattern. If true, we use strcmp(). |
1899 | bool exact_match; | |
62dfdd4d ILT |
1900 | // True if --no-undefined-version is in effect and we found this |
1901 | // version in get_symbol_version. We use mutable because this | |
1902 | // struct is generally not modifiable after it has been created. | |
1903 | mutable bool was_matched_by_symbol; | |
494e05f4 | 1904 | }; |
dbe717ef | 1905 | |
494e05f4 | 1906 | // A list of expressions. |
6affe781 ILT |
1907 | struct Version_expression_list |
1908 | { | |
494e05f4 ILT |
1909 | std::vector<struct Version_expression> expressions; |
1910 | }; | |
e5756efb | 1911 | |
494e05f4 ILT |
1912 | // A list of which versions upon which another version depends. |
1913 | // Strings should be from the Stringpool. | |
6affe781 ILT |
1914 | struct Version_dependency_list |
1915 | { | |
494e05f4 ILT |
1916 | std::vector<std::string> dependencies; |
1917 | }; | |
dbe717ef | 1918 | |
494e05f4 ILT |
1919 | // The total definition of a version. It includes the tag for the |
1920 | // version, its global and local expressions, and any dependencies. | |
6affe781 ILT |
1921 | struct Version_tree |
1922 | { | |
494e05f4 | 1923 | Version_tree() |
6affe781 ILT |
1924 | : tag(), global(NULL), local(NULL), dependencies(NULL) |
1925 | { } | |
e5756efb | 1926 | |
494e05f4 ILT |
1927 | std::string tag; |
1928 | const struct Version_expression_list* global; | |
1929 | const struct Version_expression_list* local; | |
1930 | const struct Version_dependency_list* dependencies; | |
1931 | }; | |
dbe717ef | 1932 | |
98e090bd ILT |
1933 | // Helper class that calls cplus_demangle when needed and takes care of freeing |
1934 | // the result. | |
1935 | ||
1936 | class Lazy_demangler | |
1937 | { | |
1938 | public: | |
1939 | Lazy_demangler(const char* symbol, int options) | |
1940 | : symbol_(symbol), options_(options), demangled_(NULL), did_demangle_(false) | |
1941 | { } | |
1942 | ||
1943 | ~Lazy_demangler() | |
1944 | { free(this->demangled_); } | |
1945 | ||
1946 | // Return the demangled name. The actual demangling happens on the first call, | |
1947 | // and the result is later cached. | |
1948 | inline char* | |
1949 | get(); | |
1950 | ||
1951 | private: | |
1952 | // The symbol to demangle. | |
ca09d69a | 1953 | const char* symbol_; |
98e090bd ILT |
1954 | // Option flags to pass to cplus_demagle. |
1955 | const int options_; | |
1956 | // The cached demangled value, or NULL if demangling didn't happen yet or | |
1957 | // failed. | |
ca09d69a | 1958 | char* demangled_; |
98e090bd ILT |
1959 | // Whether we already called cplus_demangle |
1960 | bool did_demangle_; | |
1961 | }; | |
1962 | ||
1963 | // Return the demangled name. The actual demangling happens on the first call, | |
1964 | // and the result is later cached. Returns NULL if the symbol cannot be | |
1965 | // demangled. | |
1966 | ||
1967 | inline char* | |
1968 | Lazy_demangler::get() | |
1969 | { | |
1970 | if (!this->did_demangle_) | |
1971 | { | |
1972 | this->demangled_ = cplus_demangle(this->symbol_, this->options_); | |
1973 | this->did_demangle_ = true; | |
1974 | } | |
1975 | return this->demangled_; | |
1976 | } | |
1977 | ||
6affe781 ILT |
1978 | // Class Version_script_info. |
1979 | ||
1980 | Version_script_info::Version_script_info() | |
98e090bd ILT |
1981 | : dependency_lists_(), expression_lists_(), version_trees_(), globs_(), |
1982 | default_version_(NULL), default_is_global_(false), is_finalized_(false) | |
6affe781 ILT |
1983 | { |
1984 | for (int i = 0; i < LANGUAGE_COUNT; ++i) | |
98e090bd | 1985 | this->exact_[i] = NULL; |
6affe781 ILT |
1986 | } |
1987 | ||
494e05f4 | 1988 | Version_script_info::~Version_script_info() |
1ef1f3d3 | 1989 | { |
1ef1f3d3 ILT |
1990 | } |
1991 | ||
6affe781 ILT |
1992 | // Forget all the known version script information. |
1993 | ||
1ef1f3d3 ILT |
1994 | void |
1995 | Version_script_info::clear() | |
494e05f4 | 1996 | { |
6affe781 ILT |
1997 | for (size_t k = 0; k < this->dependency_lists_.size(); ++k) |
1998 | delete this->dependency_lists_[k]; | |
1ef1f3d3 | 1999 | this->dependency_lists_.clear(); |
6affe781 ILT |
2000 | for (size_t k = 0; k < this->version_trees_.size(); ++k) |
2001 | delete this->version_trees_[k]; | |
1ef1f3d3 | 2002 | this->version_trees_.clear(); |
6affe781 ILT |
2003 | for (size_t k = 0; k < this->expression_lists_.size(); ++k) |
2004 | delete this->expression_lists_[k]; | |
1ef1f3d3 | 2005 | this->expression_lists_.clear(); |
dbe717ef ILT |
2006 | } |
2007 | ||
6affe781 ILT |
2008 | // Finalize the version script information. |
2009 | ||
2010 | void | |
2011 | Version_script_info::finalize() | |
2012 | { | |
2013 | if (!this->is_finalized_) | |
2014 | { | |
2015 | this->build_lookup_tables(); | |
2016 | this->is_finalized_ = true; | |
2017 | } | |
2018 | } | |
2019 | ||
2020 | // Return all the versions. | |
2021 | ||
494e05f4 ILT |
2022 | std::vector<std::string> |
2023 | Version_script_info::get_versions() const | |
dbe717ef | 2024 | { |
494e05f4 | 2025 | std::vector<std::string> ret; |
6affe781 | 2026 | for (size_t j = 0; j < this->version_trees_.size(); ++j) |
057ead22 ILT |
2027 | if (!this->version_trees_[j]->tag.empty()) |
2028 | ret.push_back(this->version_trees_[j]->tag); | |
494e05f4 | 2029 | return ret; |
dbe717ef ILT |
2030 | } |
2031 | ||
6affe781 ILT |
2032 | // Return the dependencies of VERSION. |
2033 | ||
494e05f4 ILT |
2034 | std::vector<std::string> |
2035 | Version_script_info::get_dependencies(const char* version) const | |
dbe717ef | 2036 | { |
494e05f4 | 2037 | std::vector<std::string> ret; |
6affe781 ILT |
2038 | for (size_t j = 0; j < this->version_trees_.size(); ++j) |
2039 | if (this->version_trees_[j]->tag == version) | |
494e05f4 ILT |
2040 | { |
2041 | const struct Version_dependency_list* deps = | |
6affe781 | 2042 | this->version_trees_[j]->dependencies; |
494e05f4 ILT |
2043 | if (deps != NULL) |
2044 | for (size_t k = 0; k < deps->dependencies.size(); ++k) | |
2045 | ret.push_back(deps->dependencies[k]); | |
2046 | return ret; | |
2047 | } | |
2048 | return ret; | |
2049 | } | |
2050 | ||
98e090bd ILT |
2051 | // A version script essentially maps a symbol name to a version tag |
2052 | // and an indication of whether symbol is global or local within that | |
2053 | // version tag. Each symbol maps to at most one version tag. | |
2054 | // Unfortunately, in practice, version scripts are ambiguous, and list | |
2055 | // symbols multiple times. Thus, we have to document the matching | |
2056 | // process. | |
2057 | ||
2058 | // This is a description of what the GNU linker does as of 2010-01-11. | |
2059 | // It walks through the version tags in the order in which they appear | |
2060 | // in the version script. For each tag, it first walks through the | |
2061 | // global patterns for that tag, then the local patterns. When | |
2062 | // looking at a single pattern, it first applies any language specific | |
2063 | // demangling as specified for the pattern, and then matches the | |
2064 | // resulting symbol name to the pattern. If it finds an exact match | |
2065 | // for a literal pattern (a pattern enclosed in quotes or with no | |
2066 | // wildcard characters), then that is the match that it uses. If | |
2067 | // finds a match with a wildcard pattern, then it saves it and | |
2068 | // continues searching. Wildcard patterns that are exactly "*" are | |
2069 | // saved separately. | |
2070 | ||
2071 | // If no exact match with a literal pattern is ever found, then if a | |
2072 | // wildcard match with a global pattern was found it is used, | |
2073 | // otherwise if a wildcard match with a local pattern was found it is | |
2074 | // used. | |
2075 | ||
2076 | // This is the result: | |
2077 | // * If there is an exact match, then we use the first tag in the | |
2078 | // version script where it matches. | |
2079 | // + If the exact match in that tag is global, it is used. | |
2080 | // + Otherwise the exact match in that tag is local, and is used. | |
2081 | // * Otherwise, if there is any match with a global wildcard pattern: | |
2082 | // + If there is any match with a wildcard pattern which is not | |
2083 | // "*", then we use the tag in which the *last* such pattern | |
2084 | // appears. | |
2085 | // + Otherwise, we matched "*". If there is no match with a local | |
2086 | // wildcard pattern which is not "*", then we use the *last* | |
2087 | // match with a global "*". Otherwise, continue. | |
2088 | // * Otherwise, if there is any match with a local 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 "*", and we use the tag in which the | |
2093 | // *last* such match occurred. | |
2094 | ||
2095 | // There is an additional wrinkle. When the GNU linker finds a symbol | |
2096 | // with a version defined in an object file due to a .symver | |
2097 | // directive, it looks up that symbol name in that version tag. If it | |
2098 | // finds it, it matches the symbol name against the patterns for that | |
2099 | // version. If there is no match with a global pattern, but there is | |
2100 | // a match with a local pattern, then the GNU linker marks the symbol | |
2101 | // as local. | |
2102 | ||
2103 | // We want gold to be generally compatible, but we also want gold to | |
2104 | // be fast. These are the rules that gold implements: | |
2105 | // * If there is an exact match for the mangled name, we use it. | |
2106 | // + If there is more than one exact match, we give a warning, and | |
2107 | // we use the first tag in the script which matches. | |
2108 | // + If a symbol has an exact match as both global and local for | |
2109 | // the same version tag, we give an error. | |
2110 | // * Otherwise, we look for an extern C++ or an extern Java exact | |
2111 | // match. If we find an exact match, we use it. | |
2112 | // + If there is more than one exact match, we give a warning, and | |
2113 | // we use the first tag in the script which matches. | |
2114 | // + If a symbol has an exact match as both global and local for | |
2115 | // the same version tag, we give an error. | |
2116 | // * Otherwise, we look through the wildcard patterns, ignoring "*" | |
2117 | // patterns. We look through the version tags in reverse order. | |
2118 | // For each version tag, we look through the global patterns and | |
2119 | // then the local patterns. We use the first match we find (i.e., | |
2120 | // the last matching version tag in the file). | |
2121 | // * Otherwise, we use the "*" pattern if there is one. We give an | |
2122 | // error if there are multiple "*" patterns. | |
2123 | ||
2124 | // At least for now, gold does not look up the version tag for a | |
2125 | // symbol version found in an object file to see if it should be | |
2126 | // forced local. There are other ways to force a symbol to be local, | |
2127 | // and I don't understand why this one is useful. | |
2128 | ||
6affe781 ILT |
2129 | // Build a set of fast lookup tables for a version script. |
2130 | ||
2131 | void | |
2132 | Version_script_info::build_lookup_tables() | |
2133 | { | |
2134 | size_t size = this->version_trees_.size(); | |
2135 | for (size_t j = 0; j < size; ++j) | |
2136 | { | |
2137 | const Version_tree* v = this->version_trees_[j]; | |
98e090bd ILT |
2138 | this->build_expression_list_lookup(v->local, v, false); |
2139 | this->build_expression_list_lookup(v->global, v, true); | |
2140 | } | |
2141 | } | |
2142 | ||
2143 | // If a pattern has backlashes but no unquoted wildcard characters, | |
2144 | // then we apply backslash unquoting and look for an exact match. | |
2145 | // Otherwise we treat it as a wildcard pattern. This function returns | |
2146 | // true for a wildcard pattern. Otherwise, it does backslash | |
2147 | // unquoting on *PATTERN and returns false. If this returns true, | |
2148 | // *PATTERN may have been partially unquoted. | |
2149 | ||
2150 | bool | |
2151 | Version_script_info::unquote(std::string* pattern) const | |
2152 | { | |
2153 | bool saw_backslash = false; | |
2154 | size_t len = pattern->length(); | |
2155 | size_t j = 0; | |
2156 | for (size_t i = 0; i < len; ++i) | |
2157 | { | |
2158 | if (saw_backslash) | |
2159 | saw_backslash = false; | |
2160 | else | |
2161 | { | |
2162 | switch ((*pattern)[i]) | |
2163 | { | |
2164 | case '?': case '[': case '*': | |
2165 | return true; | |
2166 | case '\\': | |
2167 | saw_backslash = true; | |
2168 | continue; | |
2169 | default: | |
2170 | break; | |
2171 | } | |
2172 | } | |
2173 | ||
2174 | if (i != j) | |
2175 | (*pattern)[j] = (*pattern)[i]; | |
2176 | ++j; | |
2177 | } | |
2178 | return false; | |
2179 | } | |
2180 | ||
2181 | // Add an exact match for MATCH to *PE. The result of the match is | |
2182 | // V/IS_GLOBAL. | |
2183 | ||
2184 | void | |
2185 | Version_script_info::add_exact_match(const std::string& match, | |
2186 | const Version_tree* v, bool is_global, | |
2187 | const Version_expression* ve, | |
ca09d69a | 2188 | Exact* pe) |
98e090bd ILT |
2189 | { |
2190 | std::pair<Exact::iterator, bool> ins = | |
2191 | pe->insert(std::make_pair(match, Version_tree_match(v, is_global, ve))); | |
2192 | if (ins.second) | |
2193 | { | |
2194 | // This is the first time we have seen this match. | |
2195 | return; | |
2196 | } | |
2197 | ||
2198 | Version_tree_match& vtm(ins.first->second); | |
2199 | if (vtm.real->tag != v->tag) | |
2200 | { | |
2201 | // This is an ambiguous match. We still return the | |
2202 | // first version that we found in the script, but we | |
2203 | // record the new version to issue a warning if we | |
2204 | // wind up looking up this symbol. | |
2205 | if (vtm.ambiguous == NULL) | |
2206 | vtm.ambiguous = v; | |
2207 | } | |
2208 | else if (is_global != vtm.is_global) | |
2209 | { | |
2210 | // We have a match for both the global and local entries for a | |
2211 | // version tag. That's got to be wrong. | |
2212 | gold_error(_("'%s' appears as both a global and a local symbol " | |
2213 | "for version '%s' in script"), | |
2214 | match.c_str(), v->tag.c_str()); | |
6affe781 ILT |
2215 | } |
2216 | } | |
2217 | ||
2218 | // Build fast lookup information for EXPLIST and store it in LOOKUP. | |
98e090bd ILT |
2219 | // All matches go to V, and IS_GLOBAL is true if they are global |
2220 | // matches. | |
6affe781 ILT |
2221 | |
2222 | void | |
2223 | Version_script_info::build_expression_list_lookup( | |
2224 | const Version_expression_list* explist, | |
2225 | const Version_tree* v, | |
98e090bd | 2226 | bool is_global) |
6affe781 ILT |
2227 | { |
2228 | if (explist == NULL) | |
2229 | return; | |
2230 | size_t size = explist->expressions.size(); | |
98e090bd | 2231 | for (size_t i = 0; i < size; ++i) |
6affe781 | 2232 | { |
98e090bd ILT |
2233 | const Version_expression& exp(explist->expressions[i]); |
2234 | ||
2235 | if (exp.pattern.length() == 1 && exp.pattern[0] == '*') | |
6affe781 | 2236 | { |
98e090bd ILT |
2237 | if (this->default_version_ != NULL |
2238 | && this->default_version_->tag != v->tag) | |
d0a91bd8 ILT |
2239 | gold_warning(_("wildcard match appears in both version '%s' " |
2240 | "and '%s' in script"), | |
2241 | this->default_version_->tag.c_str(), v->tag.c_str()); | |
98e090bd ILT |
2242 | else if (this->default_version_ != NULL |
2243 | && this->default_is_global_ != is_global) | |
2244 | gold_error(_("wildcard match appears as both global and local " | |
2245 | "in version '%s' in script"), | |
2246 | v->tag.c_str()); | |
2247 | this->default_version_ = v; | |
2248 | this->default_is_global_ = is_global; | |
2249 | continue; | |
2250 | } | |
2251 | ||
2252 | std::string pattern = exp.pattern; | |
2253 | if (!exp.exact_match) | |
2254 | { | |
2255 | if (this->unquote(&pattern)) | |
6affe781 | 2256 | { |
98e090bd ILT |
2257 | this->globs_.push_back(Glob(&exp, v, is_global)); |
2258 | continue; | |
6affe781 ILT |
2259 | } |
2260 | } | |
98e090bd ILT |
2261 | |
2262 | if (this->exact_[exp.language] == NULL) | |
2263 | this->exact_[exp.language] = new Exact(); | |
2264 | this->add_exact_match(pattern, v, is_global, &exp, | |
2265 | this->exact_[exp.language]); | |
6affe781 ILT |
2266 | } |
2267 | } | |
2268 | ||
98e090bd ILT |
2269 | // Return the name to match given a name, a language code, and two |
2270 | // lazy demanglers. | |
62dfdd4d | 2271 | |
98e090bd ILT |
2272 | const char* |
2273 | Version_script_info::get_name_to_match(const char* name, | |
2274 | int language, | |
2275 | Lazy_demangler* cpp_demangler, | |
2276 | Lazy_demangler* java_demangler) const | |
62dfdd4d | 2277 | { |
98e090bd | 2278 | switch (language) |
62dfdd4d | 2279 | { |
98e090bd ILT |
2280 | case LANGUAGE_C: |
2281 | return name; | |
2282 | case LANGUAGE_CXX: | |
2283 | return cpp_demangler->get(); | |
2284 | case LANGUAGE_JAVA: | |
2285 | return java_demangler->get(); | |
2286 | default: | |
2287 | gold_unreachable(); | |
62dfdd4d | 2288 | } |
62dfdd4d ILT |
2289 | } |
2290 | ||
98e090bd ILT |
2291 | // Look up SYMBOL_NAME in the list of versions. Return true if the |
2292 | // symbol is found, false if not. If the symbol is found, then if | |
2293 | // PVERSION is not NULL, set *PVERSION to the version tag, and if | |
2294 | // P_IS_GLOBAL is not NULL, set *P_IS_GLOBAL according to whether the | |
2295 | // symbol is global or not. | |
057ead22 ILT |
2296 | |
2297 | bool | |
98e090bd ILT |
2298 | Version_script_info::get_symbol_version(const char* symbol_name, |
2299 | std::string* pversion, | |
2300 | bool* p_is_global) const | |
494e05f4 | 2301 | { |
98e090bd ILT |
2302 | Lazy_demangler cpp_demangled_name(symbol_name, DMGL_ANSI | DMGL_PARAMS); |
2303 | Lazy_demangler java_demangled_name(symbol_name, | |
2304 | DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA); | |
2305 | ||
6affe781 | 2306 | gold_assert(this->is_finalized_); |
6affe781 | 2307 | for (int i = 0; i < LANGUAGE_COUNT; ++i) |
494e05f4 | 2308 | { |
98e090bd ILT |
2309 | Exact* exact = this->exact_[i]; |
2310 | if (exact == NULL) | |
6affe781 ILT |
2311 | continue; |
2312 | ||
98e090bd ILT |
2313 | const char* name_to_match = this->get_name_to_match(symbol_name, i, |
2314 | &cpp_demangled_name, | |
2315 | &java_demangled_name); | |
2316 | if (name_to_match == NULL) | |
6affe781 | 2317 | { |
98e090bd ILT |
2318 | // If the name can not be demangled, the GNU linker goes |
2319 | // ahead and tries to match it anyhow. That does not | |
2320 | // make sense to me and I have not implemented it. | |
2321 | continue; | |
6affe781 ILT |
2322 | } |
2323 | ||
98e090bd ILT |
2324 | Exact::const_iterator pe = exact->find(name_to_match); |
2325 | if (pe != exact->end()) | |
6affe781 | 2326 | { |
98e090bd ILT |
2327 | const Version_tree_match& vtm(pe->second); |
2328 | if (vtm.ambiguous != NULL) | |
2329 | gold_warning(_("using '%s' as version for '%s' which is also " | |
2330 | "named in version '%s' in script"), | |
2331 | vtm.real->tag.c_str(), name_to_match, | |
2332 | vtm.ambiguous->tag.c_str()); | |
2333 | ||
6affe781 | 2334 | if (pversion != NULL) |
98e090bd ILT |
2335 | *pversion = vtm.real->tag; |
2336 | if (p_is_global != NULL) | |
2337 | *p_is_global = vtm.is_global; | |
62dfdd4d ILT |
2338 | |
2339 | // If we are using --no-undefined-version, and this is a | |
2340 | // global symbol, we have to record that we have found this | |
2341 | // symbol, so that we don't warn about it. We have to do | |
2342 | // this now, because otherwise we have no way to get from a | |
2343 | // non-C language back to the demangled name that we | |
2344 | // matched. | |
98e090bd ILT |
2345 | if (p_is_global != NULL && vtm.is_global) |
2346 | vtm.expression->was_matched_by_symbol = true; | |
62dfdd4d | 2347 | |
6affe781 ILT |
2348 | return true; |
2349 | } | |
98e090bd ILT |
2350 | } |
2351 | ||
2352 | // Look through the glob patterns in reverse order. | |
6affe781 | 2353 | |
98e090bd ILT |
2354 | for (Globs::const_reverse_iterator p = this->globs_.rbegin(); |
2355 | p != this->globs_.rend(); | |
2356 | ++p) | |
2357 | { | |
2358 | int language = p->expression->language; | |
2359 | const char* name_to_match = this->get_name_to_match(symbol_name, | |
2360 | language, | |
2361 | &cpp_demangled_name, | |
2362 | &java_demangled_name); | |
2363 | if (name_to_match == NULL) | |
2364 | continue; | |
2365 | ||
2366 | if (fnmatch(p->expression->pattern.c_str(), name_to_match, | |
2367 | FNM_NOESCAPE) == 0) | |
6affe781 | 2368 | { |
98e090bd ILT |
2369 | if (pversion != NULL) |
2370 | *pversion = p->version->tag; | |
2371 | if (p_is_global != NULL) | |
2372 | *p_is_global = p->is_global; | |
2373 | return true; | |
6affe781 | 2374 | } |
98e090bd | 2375 | } |
6affe781 | 2376 | |
98e090bd ILT |
2377 | // Finally, there may be a wildcard. |
2378 | if (this->default_version_ != NULL) | |
2379 | { | |
2380 | if (pversion != NULL) | |
2381 | *pversion = this->default_version_->tag; | |
2382 | if (p_is_global != NULL) | |
2383 | *p_is_global = this->default_is_global_; | |
2384 | return true; | |
494e05f4 | 2385 | } |
6affe781 | 2386 | |
057ead22 | 2387 | return false; |
494e05f4 ILT |
2388 | } |
2389 | ||
62dfdd4d ILT |
2390 | // Give an error if any exact symbol names (not wildcards) appear in a |
2391 | // version script, but there is no such symbol. | |
2392 | ||
2393 | void | |
2394 | Version_script_info::check_unmatched_names(const Symbol_table* symtab) const | |
2395 | { | |
2396 | for (size_t i = 0; i < this->version_trees_.size(); ++i) | |
2397 | { | |
2398 | const Version_tree* vt = this->version_trees_[i]; | |
2399 | if (vt->global == NULL) | |
2400 | continue; | |
2401 | for (size_t j = 0; j < vt->global->expressions.size(); ++j) | |
2402 | { | |
2403 | const Version_expression& expression(vt->global->expressions[j]); | |
2404 | ||
2405 | // Ignore cases where we used the version because we saw a | |
2406 | // symbol that we looked up. Note that | |
2407 | // WAS_MATCHED_BY_SYMBOL will be true even if the symbol was | |
2408 | // not a definition. That's OK as in that case we most | |
2409 | // likely gave an undefined symbol error anyhow. | |
2410 | if (expression.was_matched_by_symbol) | |
2411 | continue; | |
2412 | ||
2413 | // Just ignore names which are in languages other than C. | |
2414 | // We have no way to look them up in the symbol table. | |
2415 | if (expression.language != LANGUAGE_C) | |
2416 | continue; | |
2417 | ||
98e090bd ILT |
2418 | // Remove backslash quoting, and ignore wildcard patterns. |
2419 | std::string pattern = expression.pattern; | |
2420 | if (!expression.exact_match) | |
62dfdd4d | 2421 | { |
98e090bd ILT |
2422 | if (this->unquote(&pattern)) |
2423 | continue; | |
62dfdd4d | 2424 | } |
98e090bd ILT |
2425 | |
2426 | if (symtab->lookup(pattern.c_str(), vt->tag.c_str()) == NULL) | |
2427 | gold_error(_("version script assignment of %s to symbol %s " | |
2428 | "failed: symbol not defined"), | |
2429 | vt->tag.c_str(), pattern.c_str()); | |
62dfdd4d ILT |
2430 | } |
2431 | } | |
2432 | } | |
2433 | ||
494e05f4 ILT |
2434 | struct Version_dependency_list* |
2435 | Version_script_info::allocate_dependency_list() | |
2436 | { | |
2437 | dependency_lists_.push_back(new Version_dependency_list); | |
2438 | return dependency_lists_.back(); | |
2439 | } | |
2440 | ||
2441 | struct Version_expression_list* | |
2442 | Version_script_info::allocate_expression_list() | |
2443 | { | |
2444 | expression_lists_.push_back(new Version_expression_list); | |
2445 | return expression_lists_.back(); | |
2446 | } | |
2447 | ||
2448 | struct Version_tree* | |
2449 | Version_script_info::allocate_version_tree() | |
2450 | { | |
2451 | version_trees_.push_back(new Version_tree); | |
2452 | return version_trees_.back(); | |
2453 | } | |
2454 | ||
2455 | // Print for debugging. | |
2456 | ||
2457 | void | |
2458 | Version_script_info::print(FILE* f) const | |
2459 | { | |
2460 | if (this->empty()) | |
2461 | return; | |
2462 | ||
2463 | fprintf(f, "VERSION {"); | |
2464 | ||
2465 | for (size_t i = 0; i < this->version_trees_.size(); ++i) | |
2466 | { | |
2467 | const Version_tree* vt = this->version_trees_[i]; | |
2468 | ||
2469 | if (vt->tag.empty()) | |
2470 | fprintf(f, " {\n"); | |
2471 | else | |
2472 | fprintf(f, " %s {\n", vt->tag.c_str()); | |
2473 | ||
2474 | if (vt->global != NULL) | |
2475 | { | |
2476 | fprintf(f, " global :\n"); | |
2477 | this->print_expression_list(f, vt->global); | |
2478 | } | |
2479 | ||
2480 | if (vt->local != NULL) | |
2481 | { | |
2482 | fprintf(f, " local :\n"); | |
2483 | this->print_expression_list(f, vt->local); | |
2484 | } | |
2485 | ||
2486 | fprintf(f, " }"); | |
2487 | if (vt->dependencies != NULL) | |
2488 | { | |
2489 | const Version_dependency_list* deps = vt->dependencies; | |
2490 | for (size_t j = 0; j < deps->dependencies.size(); ++j) | |
2491 | { | |
2492 | if (j < deps->dependencies.size() - 1) | |
2493 | fprintf(f, "\n"); | |
2494 | fprintf(f, " %s", deps->dependencies[j].c_str()); | |
2495 | } | |
2496 | } | |
2497 | fprintf(f, ";\n"); | |
2498 | } | |
2499 | ||
2500 | fprintf(f, "}\n"); | |
2501 | } | |
2502 | ||
2503 | void | |
2504 | Version_script_info::print_expression_list( | |
2505 | FILE* f, | |
2506 | const Version_expression_list* vel) const | |
2507 | { | |
6affe781 | 2508 | Version_script_info::Language current_language = LANGUAGE_C; |
494e05f4 ILT |
2509 | for (size_t i = 0; i < vel->expressions.size(); ++i) |
2510 | { | |
2511 | const Version_expression& ve(vel->expressions[i]); | |
2512 | ||
2513 | if (ve.language != current_language) | |
2514 | { | |
6affe781 | 2515 | if (current_language != LANGUAGE_C) |
494e05f4 | 2516 | fprintf(f, " }\n"); |
6affe781 ILT |
2517 | switch (ve.language) |
2518 | { | |
2519 | case LANGUAGE_C: | |
2520 | break; | |
2521 | case LANGUAGE_CXX: | |
2522 | fprintf(f, " extern \"C++\" {\n"); | |
2523 | break; | |
2524 | case LANGUAGE_JAVA: | |
2525 | fprintf(f, " extern \"Java\" {\n"); | |
2526 | break; | |
2527 | default: | |
2528 | gold_unreachable(); | |
2529 | } | |
494e05f4 ILT |
2530 | current_language = ve.language; |
2531 | } | |
2532 | ||
2533 | fprintf(f, " "); | |
6affe781 | 2534 | if (current_language != LANGUAGE_C) |
494e05f4 ILT |
2535 | fprintf(f, " "); |
2536 | ||
2537 | if (ve.exact_match) | |
2538 | fprintf(f, "\""); | |
2539 | fprintf(f, "%s", ve.pattern.c_str()); | |
2540 | if (ve.exact_match) | |
2541 | fprintf(f, "\""); | |
2542 | ||
2543 | fprintf(f, "\n"); | |
2544 | } | |
2545 | ||
6affe781 | 2546 | if (current_language != LANGUAGE_C) |
494e05f4 ILT |
2547 | fprintf(f, " }\n"); |
2548 | } | |
2549 | ||
2550 | } // End namespace gold. | |
2551 | ||
2552 | // The remaining functions are extern "C", so it's clearer to not put | |
2553 | // them in namespace gold. | |
2554 | ||
2555 | using namespace gold; | |
2556 | ||
2557 | // This function is called by the bison parser to return the next | |
2558 | // token. | |
2559 | ||
2560 | extern "C" int | |
2561 | yylex(YYSTYPE* lvalp, void* closurev) | |
2562 | { | |
2563 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2564 | const Token* token = closure->next_token(); | |
2565 | switch (token->classification()) | |
2566 | { | |
2567 | default: | |
2568 | gold_unreachable(); | |
2569 | ||
2570 | case Token::TOKEN_INVALID: | |
2571 | yyerror(closurev, "invalid character"); | |
2572 | return 0; | |
2573 | ||
2574 | case Token::TOKEN_EOF: | |
2575 | return 0; | |
2576 | ||
2577 | case Token::TOKEN_STRING: | |
2578 | { | |
2579 | // This is either a keyword or a STRING. | |
2580 | size_t len; | |
2581 | const char* str = token->string_value(&len); | |
2582 | int parsecode = 0; | |
2583 | switch (closure->lex_mode()) | |
2584 | { | |
2585 | case Lex::LINKER_SCRIPT: | |
2586 | parsecode = script_keywords.keyword_to_parsecode(str, len); | |
2587 | break; | |
2588 | case Lex::VERSION_SCRIPT: | |
2589 | parsecode = version_script_keywords.keyword_to_parsecode(str, len); | |
2590 | break; | |
c82fbeee CS |
2591 | case Lex::DYNAMIC_LIST: |
2592 | parsecode = dynamic_list_keywords.keyword_to_parsecode(str, len); | |
2593 | break; | |
494e05f4 ILT |
2594 | default: |
2595 | break; | |
2596 | } | |
2597 | if (parsecode != 0) | |
2598 | return parsecode; | |
2599 | lvalp->string.value = str; | |
2600 | lvalp->string.length = len; | |
2601 | return STRING; | |
2602 | } | |
2603 | ||
2604 | case Token::TOKEN_QUOTED_STRING: | |
2605 | lvalp->string.value = token->string_value(&lvalp->string.length); | |
2606 | return QUOTED_STRING; | |
2607 | ||
2608 | case Token::TOKEN_OPERATOR: | |
2609 | return token->operator_value(); | |
2610 | ||
2611 | case Token::TOKEN_INTEGER: | |
2612 | lvalp->integer = token->integer_value(); | |
2613 | return INTEGER; | |
2614 | } | |
2615 | } | |
2616 | ||
2617 | // This function is called by the bison parser to report an error. | |
2618 | ||
2619 | extern "C" void | |
2620 | yyerror(void* closurev, const char* message) | |
2621 | { | |
2622 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2623 | gold_error(_("%s:%d:%d: %s"), closure->filename(), closure->lineno(), | |
2624 | closure->charpos(), message); | |
2625 | } | |
2626 | ||
afc06bb8 ILT |
2627 | // Called by the bison parser to add an external symbol to the link. |
2628 | ||
2629 | extern "C" void | |
2630 | script_add_extern(void* closurev, const char* name, size_t length) | |
2631 | { | |
d433c3ac ILT |
2632 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
2633 | closure->script_options()->add_symbol_reference(name, length); | |
afc06bb8 ILT |
2634 | } |
2635 | ||
494e05f4 ILT |
2636 | // Called by the bison parser to add a file to the link. |
2637 | ||
2638 | extern "C" void | |
2639 | script_add_file(void* closurev, const char* name, size_t length) | |
2640 | { | |
2641 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2642 | ||
2643 | // If this is an absolute path, and we found the script in the | |
2644 | // sysroot, then we want to prepend the sysroot to the file name. | |
2645 | // For example, this is how we handle a cross link to the x86_64 | |
2646 | // libc.so, which refers to /lib/libc.so.6. | |
2647 | std::string name_string(name, length); | |
2648 | const char* extra_search_path = "."; | |
2649 | std::string script_directory; | |
2650 | if (IS_ABSOLUTE_PATH(name_string.c_str())) | |
2651 | { | |
2652 | if (closure->is_in_sysroot()) | |
2653 | { | |
8851ecca | 2654 | const std::string& sysroot(parameters->options().sysroot()); |
494e05f4 ILT |
2655 | gold_assert(!sysroot.empty()); |
2656 | name_string = sysroot + name_string; | |
2657 | } | |
2658 | } | |
2659 | else | |
2660 | { | |
2661 | // In addition to checking the normal library search path, we | |
2662 | // also want to check in the script-directory. | |
ca09d69a | 2663 | const char* slash = strrchr(closure->filename(), '/'); |
494e05f4 ILT |
2664 | if (slash != NULL) |
2665 | { | |
2666 | script_directory.assign(closure->filename(), | |
2667 | slash - closure->filename() + 1); | |
2668 | extra_search_path = script_directory.c_str(); | |
2669 | } | |
2670 | } | |
2671 | ||
ae3b5189 CD |
2672 | Input_file_argument file(name_string.c_str(), |
2673 | Input_file_argument::INPUT_FILE_TYPE_FILE, | |
2674 | extra_search_path, false, | |
2675 | closure->position_dependent_options()); | |
c7975edd CC |
2676 | Input_argument& arg = closure->inputs()->add_file(file); |
2677 | arg.set_script_info(closure->script_info()); | |
dbe717ef ILT |
2678 | } |
2679 | ||
e1df38aa NC |
2680 | // Called by the bison parser to add a library to the link. |
2681 | ||
2682 | extern "C" void | |
2683 | script_add_library(void* closurev, const char* name, size_t length) | |
2684 | { | |
2685 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2686 | std::string name_string(name, length); | |
2687 | ||
2688 | if (name_string[0] != 'l') | |
2689 | gold_error(_("library name must be prefixed with -l")); | |
2690 | ||
2691 | Input_file_argument file(name_string.c_str() + 1, | |
2692 | Input_file_argument::INPUT_FILE_TYPE_LIBRARY, | |
2693 | "", false, | |
2694 | closure->position_dependent_options()); | |
c7975edd CC |
2695 | Input_argument& arg = closure->inputs()->add_file(file); |
2696 | arg.set_script_info(closure->script_info()); | |
e1df38aa NC |
2697 | } |
2698 | ||
dbe717ef ILT |
2699 | // Called by the bison parser to start a group. If we are already in |
2700 | // a group, that means that this script was invoked within a | |
2701 | // --start-group --end-group sequence on the command line, or that | |
2702 | // this script was found in a GROUP of another script. In that case, | |
2703 | // we simply continue the existing group, rather than starting a new | |
2704 | // one. It is possible to construct a case in which this will do | |
2705 | // something other than what would happen if we did a recursive group, | |
2706 | // but it's hard to imagine why the different behaviour would be | |
2707 | // useful for a real program. Avoiding recursive groups is simpler | |
2708 | // and more efficient. | |
2709 | ||
2710 | extern "C" void | |
2711 | script_start_group(void* closurev) | |
2712 | { | |
2713 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2714 | if (!closure->in_group()) | |
2715 | closure->inputs()->start_group(); | |
2716 | } | |
2717 | ||
2718 | // Called by the bison parser at the end of a group. | |
2719 | ||
2720 | extern "C" void | |
2721 | script_end_group(void* closurev) | |
2722 | { | |
2723 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2724 | if (!closure->in_group()) | |
2725 | closure->inputs()->end_group(); | |
2726 | } | |
2727 | ||
2728 | // Called by the bison parser to start an AS_NEEDED list. | |
2729 | ||
2730 | extern "C" void | |
2731 | script_start_as_needed(void* closurev) | |
2732 | { | |
2733 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
45aa233b | 2734 | closure->position_dependent_options().set_as_needed(true); |
dbe717ef ILT |
2735 | } |
2736 | ||
2737 | // Called by the bison parser at the end of an AS_NEEDED list. | |
2738 | ||
2739 | extern "C" void | |
2740 | script_end_as_needed(void* closurev) | |
2741 | { | |
2742 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
45aa233b | 2743 | closure->position_dependent_options().set_as_needed(false); |
dbe717ef | 2744 | } |
195e7dc6 | 2745 | |
d391083d ILT |
2746 | // Called by the bison parser to set the entry symbol. |
2747 | ||
2748 | extern "C" void | |
e5756efb | 2749 | script_set_entry(void* closurev, const char* entry, size_t length) |
d391083d | 2750 | { |
a5dc0706 ILT |
2751 | // We'll parse this exactly the same as --entry=ENTRY on the commandline |
2752 | // TODO(csilvers): FIXME -- call set_entry directly. | |
1890b465 | 2753 | std::string arg("--entry="); |
a5dc0706 ILT |
2754 | arg.append(entry, length); |
2755 | script_parse_option(closurev, arg.c_str(), arg.size()); | |
e5756efb ILT |
2756 | } |
2757 | ||
0dfbdef4 ILT |
2758 | // Called by the bison parser to set whether to define common symbols. |
2759 | ||
2760 | extern "C" void | |
2761 | script_set_common_allocation(void* closurev, int set) | |
2762 | { | |
2763 | const char* arg = set != 0 ? "--define-common" : "--no-define-common"; | |
2764 | script_parse_option(closurev, arg, strlen(arg)); | |
2765 | } | |
2766 | ||
88a4108b ILT |
2767 | // Called by the bison parser to refer to a symbol. |
2768 | ||
2769 | extern "C" Expression* | |
ca09d69a | 2770 | script_symbol(void* closurev, const char* name, size_t length) |
88a4108b ILT |
2771 | { |
2772 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2773 | if (length != 1 || name[0] != '.') | |
2774 | closure->script_options()->add_symbol_reference(name, length); | |
2775 | return script_exp_string(name, length); | |
2776 | } | |
2777 | ||
e5756efb ILT |
2778 | // Called by the bison parser to define a symbol. |
2779 | ||
2780 | extern "C" void | |
2781 | script_set_symbol(void* closurev, const char* name, size_t length, | |
2782 | Expression* value, int providei, int hiddeni) | |
2783 | { | |
2784 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2785 | const bool provide = providei != 0; | |
2786 | const bool hidden = hiddeni != 0; | |
99fff23b ILT |
2787 | closure->script_options()->add_symbol_assignment(name, length, |
2788 | closure->parsing_defsym(), | |
2789 | value, provide, hidden); | |
15f8229b | 2790 | closure->clear_skip_on_incompatible_target(); |
d391083d ILT |
2791 | } |
2792 | ||
494e05f4 ILT |
2793 | // Called by the bison parser to add an assertion. |
2794 | ||
2795 | extern "C" void | |
2796 | script_add_assertion(void* closurev, Expression* check, const char* message, | |
2797 | size_t messagelen) | |
2798 | { | |
2799 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2800 | closure->script_options()->add_assertion(check, message, messagelen); | |
15f8229b | 2801 | closure->clear_skip_on_incompatible_target(); |
494e05f4 ILT |
2802 | } |
2803 | ||
195e7dc6 ILT |
2804 | // Called by the bison parser to parse an OPTION. |
2805 | ||
2806 | extern "C" void | |
e5756efb | 2807 | script_parse_option(void* closurev, const char* option, size_t length) |
195e7dc6 ILT |
2808 | { |
2809 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
a0451b38 ILT |
2810 | // We treat the option as a single command-line option, even if |
2811 | // it has internal whitespace. | |
2812 | if (closure->command_line() == NULL) | |
2813 | { | |
2814 | // There are some options that we could handle here--e.g., | |
2815 | // -lLIBRARY. Should we bother? | |
e5756efb | 2816 | gold_warning(_("%s:%d:%d: ignoring command OPTION; OPTION is only valid" |
d391083d | 2817 | " for scripts specified via -T/--script"), |
e5756efb | 2818 | closure->filename(), closure->lineno(), closure->charpos()); |
a0451b38 ILT |
2819 | } |
2820 | else | |
2821 | { | |
2822 | bool past_a_double_dash_option = false; | |
ee1fe73e | 2823 | const char* mutable_option = strndup(option, length); |
e5756efb | 2824 | gold_assert(mutable_option != NULL); |
a0451b38 ILT |
2825 | closure->command_line()->process_one_option(1, &mutable_option, 0, |
2826 | &past_a_double_dash_option); | |
a5dc0706 ILT |
2827 | // The General_options class will quite possibly store a pointer |
2828 | // into mutable_option, so we can't free it. In cases the class | |
2829 | // does not store such a pointer, this is a memory leak. Alas. :( | |
a0451b38 | 2830 | } |
15f8229b ILT |
2831 | closure->clear_skip_on_incompatible_target(); |
2832 | } | |
2833 | ||
2834 | // Called by the bison parser to handle OUTPUT_FORMAT. OUTPUT_FORMAT | |
2835 | // takes either one or three arguments. In the three argument case, | |
2836 | // the format depends on the endianness option, which we don't | |
2837 | // currently support (FIXME). If we see an OUTPUT_FORMAT for the | |
2838 | // wrong format, then we want to search for a new file. Returning 0 | |
2839 | // here will cause the parser to immediately abort. | |
2840 | ||
2841 | extern "C" int | |
2842 | script_check_output_format(void* closurev, | |
2843 | const char* default_name, size_t default_length, | |
2844 | const char*, size_t, const char*, size_t) | |
2845 | { | |
2846 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2847 | std::string name(default_name, default_length); | |
03ef7571 | 2848 | Target* target = select_target_by_bfd_name(name.c_str()); |
15f8229b ILT |
2849 | if (target == NULL || !parameters->is_compatible_target(target)) |
2850 | { | |
2851 | if (closure->skip_on_incompatible_target()) | |
2852 | { | |
2853 | closure->set_found_incompatible_target(); | |
2854 | return 0; | |
2855 | } | |
2856 | // FIXME: Should we warn about the unknown target? | |
2857 | } | |
2858 | return 1; | |
195e7dc6 | 2859 | } |
e5756efb | 2860 | |
e6a307ba ILT |
2861 | // Called by the bison parser to handle TARGET. |
2862 | ||
2863 | extern "C" void | |
2864 | script_set_target(void* closurev, const char* target, size_t len) | |
2865 | { | |
2866 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2867 | std::string s(target, len); | |
2868 | General_options::Object_format format_enum; | |
2869 | format_enum = General_options::string_to_object_format(s.c_str()); | |
2870 | closure->position_dependent_options().set_format_enum(format_enum); | |
2871 | } | |
2872 | ||
3802b2dd ILT |
2873 | // Called by the bison parser to handle SEARCH_DIR. This is handled |
2874 | // exactly like a -L option. | |
2875 | ||
2876 | extern "C" void | |
2877 | script_add_search_dir(void* closurev, const char* option, size_t length) | |
2878 | { | |
2879 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2880 | if (closure->command_line() == NULL) | |
2881 | gold_warning(_("%s:%d:%d: ignoring SEARCH_DIR; SEARCH_DIR is only valid" | |
2882 | " for scripts specified via -T/--script"), | |
2883 | closure->filename(), closure->lineno(), closure->charpos()); | |
91e75c8a | 2884 | else if (!closure->command_line()->options().nostdlib()) |
3802b2dd ILT |
2885 | { |
2886 | std::string s = "-L" + std::string(option, length); | |
2887 | script_parse_option(closurev, s.c_str(), s.size()); | |
2888 | } | |
2889 | } | |
2890 | ||
e5756efb ILT |
2891 | /* Called by the bison parser to push the lexer into expression |
2892 | mode. */ | |
2893 | ||
494e05f4 | 2894 | extern "C" void |
e5756efb ILT |
2895 | script_push_lex_into_expression_mode(void* closurev) |
2896 | { | |
2897 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2898 | closure->push_lex_mode(Lex::EXPRESSION); | |
2899 | } | |
2900 | ||
09124467 ILT |
2901 | /* Called by the bison parser to push the lexer into version |
2902 | mode. */ | |
2903 | ||
494e05f4 | 2904 | extern "C" void |
09124467 ILT |
2905 | script_push_lex_into_version_mode(void* closurev) |
2906 | { | |
2907 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
6affe781 ILT |
2908 | if (closure->version_script()->is_finalized()) |
2909 | gold_error(_("%s:%d:%d: invalid use of VERSION in input file"), | |
2910 | closure->filename(), closure->lineno(), closure->charpos()); | |
09124467 ILT |
2911 | closure->push_lex_mode(Lex::VERSION_SCRIPT); |
2912 | } | |
2913 | ||
e5756efb ILT |
2914 | /* Called by the bison parser to pop the lexer mode. */ |
2915 | ||
494e05f4 | 2916 | extern "C" void |
e5756efb ILT |
2917 | script_pop_lex_mode(void* closurev) |
2918 | { | |
2919 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2920 | closure->pop_lex_mode(); | |
2921 | } | |
09124467 | 2922 | |
09124467 ILT |
2923 | // Register an entire version node. For example: |
2924 | // | |
2925 | // GLIBC_2.1 { | |
2926 | // global: foo; | |
2927 | // } GLIBC_2.0; | |
2928 | // | |
2929 | // - tag is "GLIBC_2.1" | |
2930 | // - tree contains the information "global: foo" | |
2931 | // - deps contains "GLIBC_2.0" | |
2932 | ||
2933 | extern "C" void | |
2934 | script_register_vers_node(void*, | |
2935 | const char* tag, | |
2936 | int taglen, | |
ca09d69a NC |
2937 | struct Version_tree* tree, |
2938 | struct Version_dependency_list* deps) | |
09124467 ILT |
2939 | { |
2940 | gold_assert(tree != NULL); | |
09124467 | 2941 | tree->dependencies = deps; |
057ead22 ILT |
2942 | if (tag != NULL) |
2943 | tree->tag = std::string(tag, taglen); | |
09124467 ILT |
2944 | } |
2945 | ||
2946 | // Add a dependencies to the list of existing dependencies, if any, | |
2947 | // and return the expanded list. | |
2948 | ||
ca09d69a | 2949 | extern "C" struct Version_dependency_list* |
09124467 | 2950 | script_add_vers_depend(void* closurev, |
ca09d69a NC |
2951 | struct Version_dependency_list* all_deps, |
2952 | const char* depend_to_add, int deplen) | |
09124467 ILT |
2953 | { |
2954 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2955 | if (all_deps == NULL) | |
2956 | all_deps = closure->version_script()->allocate_dependency_list(); | |
2957 | all_deps->dependencies.push_back(std::string(depend_to_add, deplen)); | |
2958 | return all_deps; | |
2959 | } | |
2960 | ||
2961 | // Add a pattern expression to an existing list of expressions, if any. | |
09124467 | 2962 | |
ca09d69a | 2963 | extern "C" struct Version_expression_list* |
09124467 | 2964 | script_new_vers_pattern(void* closurev, |
ca09d69a NC |
2965 | struct Version_expression_list* expressions, |
2966 | const char* pattern, int patlen, int exact_match) | |
09124467 ILT |
2967 | { |
2968 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
2969 | if (expressions == NULL) | |
2970 | expressions = closure->version_script()->allocate_expression_list(); | |
2971 | expressions->expressions.push_back( | |
2972 | Version_expression(std::string(pattern, patlen), | |
10600224 ILT |
2973 | closure->get_current_language(), |
2974 | static_cast<bool>(exact_match))); | |
09124467 ILT |
2975 | return expressions; |
2976 | } | |
2977 | ||
10600224 ILT |
2978 | // Attaches b to the end of a, and clears b. So a = a + b and b = {}. |
2979 | ||
2980 | extern "C" struct Version_expression_list* | |
ca09d69a NC |
2981 | script_merge_expressions(struct Version_expression_list* a, |
2982 | struct Version_expression_list* b) | |
10600224 ILT |
2983 | { |
2984 | a->expressions.insert(a->expressions.end(), | |
2985 | b->expressions.begin(), b->expressions.end()); | |
2986 | // We could delete b and remove it from expressions_lists_, but | |
2987 | // that's a lot of work. This works just as well. | |
2988 | b->expressions.clear(); | |
2989 | return a; | |
2990 | } | |
2991 | ||
09124467 ILT |
2992 | // Combine the global and local expressions into a a Version_tree. |
2993 | ||
ca09d69a | 2994 | extern "C" struct Version_tree* |
09124467 | 2995 | script_new_vers_node(void* closurev, |
ca09d69a NC |
2996 | struct Version_expression_list* global, |
2997 | struct Version_expression_list* local) | |
09124467 ILT |
2998 | { |
2999 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3000 | Version_tree* tree = closure->version_script()->allocate_version_tree(); | |
3001 | tree->global = global; | |
3002 | tree->local = local; | |
3003 | return tree; | |
3004 | } | |
3005 | ||
10600224 | 3006 | // Handle a transition in language, such as at the |
09124467 ILT |
3007 | // start or end of 'extern "C++"' |
3008 | ||
3009 | extern "C" void | |
3010 | version_script_push_lang(void* closurev, const char* lang, int langlen) | |
3011 | { | |
3012 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
6affe781 ILT |
3013 | std::string language(lang, langlen); |
3014 | Version_script_info::Language code; | |
3015 | if (language.empty() || language == "C") | |
3016 | code = Version_script_info::LANGUAGE_C; | |
3017 | else if (language == "C++") | |
3018 | code = Version_script_info::LANGUAGE_CXX; | |
3019 | else if (language == "Java") | |
3020 | code = Version_script_info::LANGUAGE_JAVA; | |
3021 | else | |
3022 | { | |
3023 | char* buf = new char[langlen + 100]; | |
3024 | snprintf(buf, langlen + 100, | |
3025 | _("unrecognized version script language '%s'"), | |
3026 | language.c_str()); | |
3027 | yyerror(closurev, buf); | |
3028 | delete[] buf; | |
3029 | code = Version_script_info::LANGUAGE_C; | |
3030 | } | |
3031 | closure->push_language(code); | |
09124467 ILT |
3032 | } |
3033 | ||
3034 | extern "C" void | |
3035 | version_script_pop_lang(void* closurev) | |
3036 | { | |
3037 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3038 | closure->pop_language(); | |
3039 | } | |
494e05f4 ILT |
3040 | |
3041 | // Called by the bison parser to start a SECTIONS clause. | |
3042 | ||
3043 | extern "C" void | |
3044 | script_start_sections(void* closurev) | |
3045 | { | |
3046 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3047 | closure->script_options()->script_sections()->start_sections(); | |
15f8229b | 3048 | closure->clear_skip_on_incompatible_target(); |
494e05f4 ILT |
3049 | } |
3050 | ||
3051 | // Called by the bison parser to finish a SECTIONS clause. | |
3052 | ||
3053 | extern "C" void | |
3054 | script_finish_sections(void* closurev) | |
3055 | { | |
3056 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3057 | closure->script_options()->script_sections()->finish_sections(); | |
3058 | } | |
3059 | ||
3060 | // Start processing entries for an output section. | |
3061 | ||
3062 | extern "C" void | |
3063 | script_start_output_section(void* closurev, const char* name, size_t namelen, | |
3064 | const struct Parser_output_section_header* header) | |
3065 | { | |
3066 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3067 | closure->script_options()->script_sections()->start_output_section(name, | |
3068 | namelen, | |
3069 | header); | |
3070 | } | |
3071 | ||
3072 | // Finish processing entries for an output section. | |
3073 | ||
3074 | extern "C" void | |
c82fbeee | 3075 | script_finish_output_section(void* closurev, |
494e05f4 ILT |
3076 | const struct Parser_output_section_trailer* trail) |
3077 | { | |
3078 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3079 | closure->script_options()->script_sections()->finish_output_section(trail); | |
3080 | } | |
3081 | ||
3082 | // Add a data item (e.g., "WORD (0)") to the current output section. | |
3083 | ||
3084 | extern "C" void | |
3085 | script_add_data(void* closurev, int data_token, Expression* val) | |
3086 | { | |
3087 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3088 | int size; | |
3089 | bool is_signed = true; | |
3090 | switch (data_token) | |
3091 | { | |
3092 | case QUAD: | |
3093 | size = 8; | |
3094 | is_signed = false; | |
3095 | break; | |
3096 | case SQUAD: | |
3097 | size = 8; | |
3098 | break; | |
3099 | case LONG: | |
3100 | size = 4; | |
3101 | break; | |
3102 | case SHORT: | |
3103 | size = 2; | |
3104 | break; | |
3105 | case BYTE: | |
3106 | size = 1; | |
3107 | break; | |
3108 | default: | |
3109 | gold_unreachable(); | |
3110 | } | |
3111 | closure->script_options()->script_sections()->add_data(size, is_signed, val); | |
3112 | } | |
3113 | ||
3114 | // Add a clause setting the fill value to the current output section. | |
3115 | ||
3116 | extern "C" void | |
3117 | script_add_fill(void* closurev, Expression* val) | |
3118 | { | |
3119 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3120 | closure->script_options()->script_sections()->add_fill(val); | |
3121 | } | |
3122 | ||
3123 | // Add a new input section specification to the current output | |
3124 | // section. | |
3125 | ||
3126 | extern "C" void | |
3127 | script_add_input_section(void* closurev, | |
3128 | const struct Input_section_spec* spec, | |
3129 | int keepi) | |
3130 | { | |
3131 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3132 | bool keep = keepi != 0; | |
3133 | closure->script_options()->script_sections()->add_input_section(spec, keep); | |
3134 | } | |
3135 | ||
2d924fd9 ILT |
3136 | // When we see DATA_SEGMENT_ALIGN we record that following output |
3137 | // sections may be relro. | |
3138 | ||
3139 | extern "C" void | |
3140 | script_data_segment_align(void* closurev) | |
3141 | { | |
3142 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3143 | if (!closure->script_options()->saw_sections_clause()) | |
3144 | gold_error(_("%s:%d:%d: DATA_SEGMENT_ALIGN not in SECTIONS clause"), | |
3145 | closure->filename(), closure->lineno(), closure->charpos()); | |
3146 | else | |
3147 | closure->script_options()->script_sections()->data_segment_align(); | |
3148 | } | |
3149 | ||
3150 | // When we see DATA_SEGMENT_RELRO_END we know that all output sections | |
3151 | // since DATA_SEGMENT_ALIGN should be relro. | |
3152 | ||
3153 | extern "C" void | |
3154 | script_data_segment_relro_end(void* closurev) | |
3155 | { | |
3156 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3157 | if (!closure->script_options()->saw_sections_clause()) | |
3158 | gold_error(_("%s:%d:%d: DATA_SEGMENT_ALIGN not in SECTIONS clause"), | |
3159 | closure->filename(), closure->lineno(), closure->charpos()); | |
3160 | else | |
3161 | closure->script_options()->script_sections()->data_segment_relro_end(); | |
3162 | } | |
3163 | ||
494e05f4 ILT |
3164 | // Create a new list of string/sort pairs. |
3165 | ||
3166 | extern "C" String_sort_list_ptr | |
3167 | script_new_string_sort_list(const struct Wildcard_section* string_sort) | |
3168 | { | |
3169 | return new String_sort_list(1, *string_sort); | |
3170 | } | |
3171 | ||
3172 | // Add an entry to a list of string/sort pairs. The way the parser | |
3173 | // works permits us to simply modify the first parameter, rather than | |
3174 | // copy the vector. | |
3175 | ||
3176 | extern "C" String_sort_list_ptr | |
3177 | script_string_sort_list_add(String_sort_list_ptr pv, | |
3178 | const struct Wildcard_section* string_sort) | |
3179 | { | |
a445fddf ILT |
3180 | if (pv == NULL) |
3181 | return script_new_string_sort_list(string_sort); | |
3182 | else | |
3183 | { | |
3184 | pv->push_back(*string_sort); | |
3185 | return pv; | |
3186 | } | |
494e05f4 ILT |
3187 | } |
3188 | ||
3189 | // Create a new list of strings. | |
3190 | ||
3191 | extern "C" String_list_ptr | |
3192 | script_new_string_list(const char* str, size_t len) | |
3193 | { | |
3194 | return new String_list(1, std::string(str, len)); | |
3195 | } | |
3196 | ||
3197 | // Add an element to a list of strings. The way the parser works | |
3198 | // permits us to simply modify the first parameter, rather than copy | |
3199 | // the vector. | |
3200 | ||
3201 | extern "C" String_list_ptr | |
3202 | script_string_list_push_back(String_list_ptr pv, const char* str, size_t len) | |
3203 | { | |
1c4f3631 ILT |
3204 | if (pv == NULL) |
3205 | return script_new_string_list(str, len); | |
3206 | else | |
3207 | { | |
3208 | pv->push_back(std::string(str, len)); | |
3209 | return pv; | |
3210 | } | |
494e05f4 ILT |
3211 | } |
3212 | ||
3213 | // Concatenate two string lists. Either or both may be NULL. The way | |
3214 | // the parser works permits us to modify the parameters, rather than | |
3215 | // copy the vector. | |
3216 | ||
3217 | extern "C" String_list_ptr | |
3218 | script_string_list_append(String_list_ptr pv1, String_list_ptr pv2) | |
3219 | { | |
3220 | if (pv1 == NULL) | |
3221 | return pv2; | |
3222 | if (pv2 == NULL) | |
3223 | return pv1; | |
3224 | pv1->insert(pv1->end(), pv2->begin(), pv2->end()); | |
3225 | return pv1; | |
3226 | } | |
1c4f3631 ILT |
3227 | |
3228 | // Add a new program header. | |
3229 | ||
3230 | extern "C" void | |
3231 | script_add_phdr(void* closurev, const char* name, size_t namelen, | |
3232 | unsigned int type, const Phdr_info* info) | |
3233 | { | |
3234 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3235 | bool includes_filehdr = info->includes_filehdr != 0; | |
3236 | bool includes_phdrs = info->includes_phdrs != 0; | |
3237 | bool is_flags_valid = info->is_flags_valid != 0; | |
3238 | Script_sections* ss = closure->script_options()->script_sections(); | |
3239 | ss->add_phdr(name, namelen, type, includes_filehdr, includes_phdrs, | |
3240 | is_flags_valid, info->flags, info->load_address); | |
15f8229b | 3241 | closure->clear_skip_on_incompatible_target(); |
1c4f3631 ILT |
3242 | } |
3243 | ||
3244 | // Convert a program header string to a type. | |
3245 | ||
3246 | #define PHDR_TYPE(NAME) { #NAME, sizeof(#NAME) - 1, elfcpp::NAME } | |
3247 | ||
3248 | static struct | |
3249 | { | |
3250 | const char* name; | |
3251 | size_t namelen; | |
3252 | unsigned int val; | |
3253 | } phdr_type_names[] = | |
3254 | { | |
3255 | PHDR_TYPE(PT_NULL), | |
3256 | PHDR_TYPE(PT_LOAD), | |
3257 | PHDR_TYPE(PT_DYNAMIC), | |
3258 | PHDR_TYPE(PT_INTERP), | |
3259 | PHDR_TYPE(PT_NOTE), | |
3260 | PHDR_TYPE(PT_SHLIB), | |
3261 | PHDR_TYPE(PT_PHDR), | |
3262 | PHDR_TYPE(PT_TLS), | |
3263 | PHDR_TYPE(PT_GNU_EH_FRAME), | |
3264 | PHDR_TYPE(PT_GNU_STACK), | |
3265 | PHDR_TYPE(PT_GNU_RELRO) | |
3266 | }; | |
3267 | ||
3268 | extern "C" unsigned int | |
3269 | script_phdr_string_to_type(void* closurev, const char* name, size_t namelen) | |
3270 | { | |
3271 | for (unsigned int i = 0; | |
3272 | i < sizeof(phdr_type_names) / sizeof(phdr_type_names[0]); | |
3273 | ++i) | |
3274 | if (namelen == phdr_type_names[i].namelen | |
3275 | && strncmp(name, phdr_type_names[i].name, namelen) == 0) | |
3276 | return phdr_type_names[i].val; | |
3277 | yyerror(closurev, _("unknown PHDR type (try integer)")); | |
3278 | return elfcpp::PT_NULL; | |
3279 | } | |
3c12dcdb DK |
3280 | |
3281 | extern "C" void | |
3282 | script_saw_segment_start_expression(void* closurev) | |
3283 | { | |
3284 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3285 | Script_sections* ss = closure->script_options()->script_sections(); | |
3286 | ss->set_saw_segment_start_expression(true); | |
3287 | } | |
7f8cd844 NC |
3288 | |
3289 | extern "C" void | |
3290 | script_set_section_region(void* closurev, const char* name, size_t namelen, | |
3291 | int set_vma) | |
3292 | { | |
3293 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3294 | if (!closure->script_options()->saw_sections_clause()) | |
3295 | { | |
3296 | gold_error(_("%s:%d:%d: MEMORY region '%.*s' referred to outside of " | |
3297 | "SECTIONS clause"), | |
3298 | closure->filename(), closure->lineno(), closure->charpos(), | |
33dbc701 | 3299 | static_cast<int>(namelen), name); |
7f8cd844 NC |
3300 | return; |
3301 | } | |
3302 | ||
3303 | Script_sections* ss = closure->script_options()->script_sections(); | |
3304 | Memory_region* mr = ss->find_memory_region(name, namelen); | |
3305 | if (mr == NULL) | |
3306 | { | |
3307 | gold_error(_("%s:%d:%d: MEMORY region '%.*s' not declared"), | |
3308 | closure->filename(), closure->lineno(), closure->charpos(), | |
33dbc701 | 3309 | static_cast<int>(namelen), name); |
7f8cd844 NC |
3310 | return; |
3311 | } | |
3312 | ||
3313 | ss->set_memory_region(mr, set_vma); | |
3314 | } | |
3315 | ||
3316 | extern "C" void | |
3317 | script_add_memory(void* closurev, const char* name, size_t namelen, | |
3318 | unsigned int attrs, Expression* origin, Expression* length) | |
3319 | { | |
3320 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3321 | Script_sections* ss = closure->script_options()->script_sections(); | |
3322 | ss->add_memory_region(name, namelen, attrs, origin, length); | |
3323 | } | |
3324 | ||
3325 | extern "C" unsigned int | |
3326 | script_parse_memory_attr(void* closurev, const char* attrs, size_t attrlen, | |
3327 | int invert) | |
3328 | { | |
3329 | int attributes = 0; | |
3330 | ||
3331 | while (attrlen--) | |
3332 | switch (*attrs++) | |
3333 | { | |
3334 | case 'R': | |
3335 | case 'r': | |
3336 | attributes |= MEM_READABLE; break; | |
3337 | case 'W': | |
3338 | case 'w': | |
3339 | attributes |= MEM_READABLE | MEM_WRITEABLE; break; | |
3340 | case 'X': | |
3341 | case 'x': | |
3342 | attributes |= MEM_EXECUTABLE; break; | |
3343 | case 'A': | |
3344 | case 'a': | |
3345 | attributes |= MEM_ALLOCATABLE; break; | |
3346 | case 'I': | |
3347 | case 'i': | |
3348 | case 'L': | |
3349 | case 'l': | |
3350 | attributes |= MEM_INITIALIZED; break; | |
3351 | default: | |
3352 | yyerror(closurev, _("unknown MEMORY attribute")); | |
3353 | } | |
3354 | ||
3355 | if (invert) | |
3356 | attributes = (~ attributes) & MEM_ATTR_MASK; | |
3357 | ||
3358 | return attributes; | |
3359 | } | |
3360 | ||
3361 | extern "C" void | |
628f39be | 3362 | script_include_directive(void* closurev, const char* filename, size_t length) |
7f8cd844 | 3363 | { |
628f39be SA |
3364 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); |
3365 | std::string name(filename, length); | |
3366 | Command_line* cmdline = closure->command_line(); | |
3367 | read_script_file(name.c_str(), cmdline, &cmdline->script_options(), | |
3368 | PARSING_LINKER_SCRIPT, Lex::LINKER_SCRIPT); | |
7f8cd844 NC |
3369 | } |
3370 | ||
3371 | // Functions for memory regions. | |
3372 | ||
3373 | extern "C" Expression* | |
3374 | script_exp_function_origin(void* closurev, const char* name, size_t namelen) | |
3375 | { | |
3376 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3377 | Script_sections* ss = closure->script_options()->script_sections(); | |
3378 | Expression* origin = ss->find_memory_region_origin(name, namelen); | |
3379 | ||
3380 | if (origin == NULL) | |
3381 | { | |
3382 | gold_error(_("undefined memory region '%s' referenced " | |
3383 | "in ORIGIN expression"), | |
3384 | name); | |
3385 | // Create a dummy expression to prevent crashes later on. | |
3386 | origin = script_exp_integer(0); | |
3387 | } | |
3388 | ||
3389 | return origin; | |
3390 | } | |
3391 | ||
3392 | extern "C" Expression* | |
3393 | script_exp_function_length(void* closurev, const char* name, size_t namelen) | |
3394 | { | |
3395 | Parser_closure* closure = static_cast<Parser_closure*>(closurev); | |
3396 | Script_sections* ss = closure->script_options()->script_sections(); | |
3397 | Expression* length = ss->find_memory_region_length(name, namelen); | |
3398 | ||
3399 | if (length == NULL) | |
3400 | { | |
3401 | gold_error(_("undefined memory region '%s' referenced " | |
3402 | "in LENGTH expression"), | |
3403 | name); | |
3404 | // Create a dummy expression to prevent crashes later on. | |
3405 | length = script_exp_integer(0); | |
3406 | } | |
3407 | ||
3408 | return length; | |
3409 | } |