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e5756efb ILT |
1 | // expression.cc -- expressions in linker scripts for gold |
2 | ||
2ea97941 | 3 | // Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
e5756efb 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 | ||
23 | #include "gold.h" | |
24 | ||
25 | #include <string> | |
26 | ||
3802b2dd | 27 | #include "elfcpp.h" |
e5756efb ILT |
28 | #include "parameters.h" |
29 | #include "symtab.h" | |
30 | #include "layout.h" | |
494e05f4 | 31 | #include "output.h" |
e5756efb ILT |
32 | #include "script.h" |
33 | #include "script-c.h" | |
34 | ||
35 | namespace gold | |
36 | { | |
37 | ||
38 | // This file holds the code which handles linker expressions. | |
39 | ||
a445fddf ILT |
40 | // The dot symbol, which linker scripts refer to simply as ".", |
41 | // requires special treatment. The dot symbol is set several times, | |
42 | // section addresses will refer to it, output sections will change it, | |
43 | // and it can be set based on the value of other symbols. We simplify | |
44 | // the handling by prohibiting setting the dot symbol to the value of | |
45 | // a non-absolute symbol. | |
46 | ||
e5756efb ILT |
47 | // When evaluating the value of an expression, we pass in a pointer to |
48 | // this struct, so that the expression evaluation can find the | |
49 | // information it needs. | |
50 | ||
51 | struct Expression::Expression_eval_info | |
52 | { | |
a445fddf | 53 | // The symbol table. |
e5756efb | 54 | const Symbol_table* symtab; |
a445fddf | 55 | // The layout--we use this to get section information. |
e5756efb | 56 | const Layout* layout; |
919ed24c ILT |
57 | // Whether to check assertions. |
58 | bool check_assertions; | |
a445fddf ILT |
59 | // Whether expressions can refer to the dot symbol. The dot symbol |
60 | // is only available within a SECTIONS clause. | |
61 | bool is_dot_available; | |
a445fddf ILT |
62 | // The current value of the dot symbol. |
63 | uint64_t dot_value; | |
77e65537 ILT |
64 | // The section in which the dot symbol is defined; this is NULL if |
65 | // it is absolute. | |
66 | Output_section* dot_section; | |
67 | // Points to where the section of the result should be stored. | |
68 | Output_section** result_section_pointer; | |
f6973bdc ILT |
69 | // Pointer to where the alignment of the result should be stored. |
70 | uint64_t* result_alignment_pointer; | |
e5756efb ILT |
71 | }; |
72 | ||
73 | // Evaluate an expression. | |
74 | ||
75 | uint64_t | |
919ed24c ILT |
76 | Expression::eval(const Symbol_table* symtab, const Layout* layout, |
77 | bool check_assertions) | |
a445fddf | 78 | { |
919ed24c | 79 | return this->eval_maybe_dot(symtab, layout, check_assertions, |
bacff3ab | 80 | false, 0, NULL, NULL, NULL); |
a445fddf ILT |
81 | } |
82 | ||
83 | // Evaluate an expression which may refer to the dot symbol. | |
84 | ||
85 | uint64_t | |
86 | Expression::eval_with_dot(const Symbol_table* symtab, const Layout* layout, | |
919ed24c ILT |
87 | bool check_assertions, uint64_t dot_value, |
88 | Output_section* dot_section, | |
f6973bdc ILT |
89 | Output_section** result_section_pointer, |
90 | uint64_t* result_alignment_pointer) | |
a445fddf | 91 | { |
919ed24c | 92 | return this->eval_maybe_dot(symtab, layout, check_assertions, true, |
f6973bdc ILT |
93 | dot_value, dot_section, result_section_pointer, |
94 | result_alignment_pointer); | |
a445fddf ILT |
95 | } |
96 | ||
97 | // Evaluate an expression which may or may not refer to the dot | |
98 | // symbol. | |
99 | ||
100 | uint64_t | |
101 | Expression::eval_maybe_dot(const Symbol_table* symtab, const Layout* layout, | |
919ed24c ILT |
102 | bool check_assertions, bool is_dot_available, |
103 | uint64_t dot_value, Output_section* dot_section, | |
f6973bdc ILT |
104 | Output_section** result_section_pointer, |
105 | uint64_t* result_alignment_pointer) | |
e5756efb ILT |
106 | { |
107 | Expression_eval_info eei; | |
108 | eei.symtab = symtab; | |
109 | eei.layout = layout; | |
919ed24c | 110 | eei.check_assertions = check_assertions; |
a445fddf | 111 | eei.is_dot_available = is_dot_available; |
a445fddf | 112 | eei.dot_value = dot_value; |
77e65537 | 113 | eei.dot_section = dot_section; |
a445fddf | 114 | |
77e65537 ILT |
115 | // We assume the value is absolute, and only set this to a section |
116 | // if we find a section relative reference. | |
bacff3ab NC |
117 | if (result_section_pointer != NULL) |
118 | *result_section_pointer = NULL; | |
77e65537 | 119 | eei.result_section_pointer = result_section_pointer; |
a445fddf | 120 | |
f6973bdc ILT |
121 | eei.result_alignment_pointer = result_alignment_pointer; |
122 | ||
e5756efb ILT |
123 | return this->value(&eei); |
124 | } | |
125 | ||
126 | // A number. | |
127 | ||
128 | class Integer_expression : public Expression | |
129 | { | |
130 | public: | |
131 | Integer_expression(uint64_t val) | |
132 | : val_(val) | |
133 | { } | |
134 | ||
135 | uint64_t | |
136 | value(const Expression_eval_info*) | |
137 | { return this->val_; } | |
138 | ||
494e05f4 ILT |
139 | void |
140 | print(FILE* f) const | |
141 | { fprintf(f, "0x%llx", static_cast<unsigned long long>(this->val_)); } | |
142 | ||
e5756efb ILT |
143 | private: |
144 | uint64_t val_; | |
145 | }; | |
146 | ||
147 | extern "C" Expression* | |
148 | script_exp_integer(uint64_t val) | |
149 | { | |
150 | return new Integer_expression(val); | |
151 | } | |
152 | ||
153 | // An expression whose value is the value of a symbol. | |
154 | ||
155 | class Symbol_expression : public Expression | |
156 | { | |
157 | public: | |
158 | Symbol_expression(const char* name, size_t length) | |
159 | : name_(name, length) | |
160 | { } | |
161 | ||
162 | uint64_t | |
163 | value(const Expression_eval_info*); | |
164 | ||
494e05f4 ILT |
165 | void |
166 | print(FILE* f) const | |
167 | { fprintf(f, "%s", this->name_.c_str()); } | |
168 | ||
e5756efb ILT |
169 | private: |
170 | std::string name_; | |
171 | }; | |
172 | ||
173 | uint64_t | |
174 | Symbol_expression::value(const Expression_eval_info* eei) | |
175 | { | |
176 | Symbol* sym = eei->symtab->lookup(this->name_.c_str()); | |
177 | if (sym == NULL || !sym->is_defined()) | |
178 | { | |
179 | gold_error(_("undefined symbol '%s' referenced in expression"), | |
180 | this->name_.c_str()); | |
181 | return 0; | |
182 | } | |
183 | ||
bacff3ab NC |
184 | if (eei->result_section_pointer != NULL) |
185 | *eei->result_section_pointer = sym->output_section(); | |
a445fddf | 186 | |
8851ecca | 187 | if (parameters->target().get_size() == 32) |
e5756efb | 188 | return eei->symtab->get_sized_symbol<32>(sym)->value(); |
8851ecca | 189 | else if (parameters->target().get_size() == 64) |
e5756efb ILT |
190 | return eei->symtab->get_sized_symbol<64>(sym)->value(); |
191 | else | |
192 | gold_unreachable(); | |
193 | } | |
194 | ||
195 | // An expression whose value is the value of the special symbol ".". | |
196 | // This is only valid within a SECTIONS clause. | |
197 | ||
198 | class Dot_expression : public Expression | |
199 | { | |
200 | public: | |
201 | Dot_expression() | |
202 | { } | |
203 | ||
204 | uint64_t | |
205 | value(const Expression_eval_info*); | |
494e05f4 ILT |
206 | |
207 | void | |
208 | print(FILE* f) const | |
209 | { fprintf(f, "."); } | |
e5756efb ILT |
210 | }; |
211 | ||
212 | uint64_t | |
a445fddf | 213 | Dot_expression::value(const Expression_eval_info* eei) |
e5756efb | 214 | { |
a445fddf ILT |
215 | if (!eei->is_dot_available) |
216 | { | |
217 | gold_error(_("invalid reference to dot symbol outside of " | |
218 | "SECTIONS clause")); | |
219 | return 0; | |
220 | } | |
bacff3ab NC |
221 | if (eei->result_section_pointer != NULL) |
222 | *eei->result_section_pointer = eei->dot_section; | |
a445fddf | 223 | return eei->dot_value; |
e5756efb ILT |
224 | } |
225 | ||
226 | // A string. This is either the name of a symbol, or ".". | |
227 | ||
228 | extern "C" Expression* | |
229 | script_exp_string(const char* name, size_t length) | |
230 | { | |
231 | if (length == 1 && name[0] == '.') | |
232 | return new Dot_expression(); | |
233 | else | |
234 | return new Symbol_expression(name, length); | |
235 | } | |
236 | ||
237 | // A unary expression. | |
238 | ||
239 | class Unary_expression : public Expression | |
240 | { | |
241 | public: | |
242 | Unary_expression(Expression* arg) | |
243 | : arg_(arg) | |
244 | { } | |
245 | ||
246 | ~Unary_expression() | |
247 | { delete this->arg_; } | |
248 | ||
249 | protected: | |
250 | uint64_t | |
77e65537 ILT |
251 | arg_value(const Expression_eval_info* eei, |
252 | Output_section** arg_section_pointer) const | |
253 | { | |
254 | return this->arg_->eval_maybe_dot(eei->symtab, eei->layout, | |
919ed24c | 255 | eei->check_assertions, |
77e65537 ILT |
256 | eei->is_dot_available, |
257 | eei->dot_value, | |
258 | eei->dot_section, | |
f6973bdc ILT |
259 | arg_section_pointer, |
260 | eei->result_alignment_pointer); | |
77e65537 | 261 | } |
e5756efb | 262 | |
494e05f4 ILT |
263 | void |
264 | arg_print(FILE* f) const | |
265 | { this->arg_->print(f); } | |
266 | ||
e5756efb ILT |
267 | private: |
268 | Expression* arg_; | |
269 | }; | |
270 | ||
271 | // Handle unary operators. We use a preprocessor macro as a hack to | |
272 | // capture the C operator. | |
273 | ||
77e65537 ILT |
274 | #define UNARY_EXPRESSION(NAME, OPERATOR) \ |
275 | class Unary_ ## NAME : public Unary_expression \ | |
276 | { \ | |
277 | public: \ | |
278 | Unary_ ## NAME(Expression* arg) \ | |
279 | : Unary_expression(arg) \ | |
280 | { } \ | |
281 | \ | |
282 | uint64_t \ | |
283 | value(const Expression_eval_info* eei) \ | |
284 | { \ | |
285 | Output_section* arg_section; \ | |
286 | uint64_t ret = OPERATOR this->arg_value(eei, &arg_section); \ | |
8851ecca | 287 | if (arg_section != NULL && parameters->options().relocatable()) \ |
77e65537 ILT |
288 | gold_warning(_("unary " #NAME " applied to section " \ |
289 | "relative value")); \ | |
290 | return ret; \ | |
291 | } \ | |
292 | \ | |
293 | void \ | |
294 | print(FILE* f) const \ | |
295 | { \ | |
296 | fprintf(f, "(%s ", #OPERATOR); \ | |
297 | this->arg_print(f); \ | |
298 | fprintf(f, ")"); \ | |
299 | } \ | |
300 | }; \ | |
301 | \ | |
302 | extern "C" Expression* \ | |
303 | script_exp_unary_ ## NAME(Expression* arg) \ | |
304 | { \ | |
305 | return new Unary_ ## NAME(arg); \ | |
e5756efb ILT |
306 | } |
307 | ||
308 | UNARY_EXPRESSION(minus, -) | |
309 | UNARY_EXPRESSION(logical_not, !) | |
310 | UNARY_EXPRESSION(bitwise_not, ~) | |
311 | ||
312 | // A binary expression. | |
313 | ||
314 | class Binary_expression : public Expression | |
315 | { | |
316 | public: | |
317 | Binary_expression(Expression* left, Expression* right) | |
318 | : left_(left), right_(right) | |
319 | { } | |
320 | ||
321 | ~Binary_expression() | |
322 | { | |
323 | delete this->left_; | |
324 | delete this->right_; | |
325 | } | |
326 | ||
327 | protected: | |
328 | uint64_t | |
77e65537 | 329 | left_value(const Expression_eval_info* eei, |
f6973bdc ILT |
330 | Output_section** section_pointer, |
331 | uint64_t* alignment_pointer) const | |
77e65537 ILT |
332 | { |
333 | return this->left_->eval_maybe_dot(eei->symtab, eei->layout, | |
919ed24c | 334 | eei->check_assertions, |
77e65537 ILT |
335 | eei->is_dot_available, |
336 | eei->dot_value, | |
337 | eei->dot_section, | |
f6973bdc ILT |
338 | section_pointer, |
339 | alignment_pointer); | |
77e65537 | 340 | } |
e5756efb ILT |
341 | |
342 | uint64_t | |
77e65537 | 343 | right_value(const Expression_eval_info* eei, |
f6973bdc ILT |
344 | Output_section** section_pointer, |
345 | uint64_t* alignment_pointer) const | |
77e65537 ILT |
346 | { |
347 | return this->right_->eval_maybe_dot(eei->symtab, eei->layout, | |
919ed24c | 348 | eei->check_assertions, |
77e65537 ILT |
349 | eei->is_dot_available, |
350 | eei->dot_value, | |
351 | eei->dot_section, | |
f6973bdc ILT |
352 | section_pointer, |
353 | alignment_pointer); | |
77e65537 | 354 | } |
e5756efb | 355 | |
494e05f4 ILT |
356 | void |
357 | left_print(FILE* f) const | |
358 | { this->left_->print(f); } | |
359 | ||
360 | void | |
361 | right_print(FILE* f) const | |
362 | { this->right_->print(f); } | |
363 | ||
364 | // This is a call to function FUNCTION_NAME. Print it. This is for | |
365 | // debugging. | |
366 | void | |
ca09d69a | 367 | print_function(FILE* f, const char* function_name) const |
494e05f4 ILT |
368 | { |
369 | fprintf(f, "%s(", function_name); | |
370 | this->left_print(f); | |
371 | fprintf(f, ", "); | |
372 | this->right_print(f); | |
373 | fprintf(f, ")"); | |
374 | } | |
375 | ||
e5756efb ILT |
376 | private: |
377 | Expression* left_; | |
378 | Expression* right_; | |
379 | }; | |
380 | ||
381 | // Handle binary operators. We use a preprocessor macro as a hack to | |
77e65537 ILT |
382 | // capture the C operator. KEEP_LEFT means that if the left operand |
383 | // is section relative and the right operand is not, the result uses | |
384 | // the same section as the left operand. KEEP_RIGHT is the same with | |
385 | // left and right swapped. IS_DIV means that we need to give an error | |
386 | // if the right operand is zero. WARN means that we should warn if | |
387 | // used on section relative values in a relocatable link. We always | |
388 | // warn if used on values in different sections in a relocatable link. | |
389 | ||
390 | #define BINARY_EXPRESSION(NAME, OPERATOR, KEEP_LEFT, KEEP_RIGHT, IS_DIV, WARN) \ | |
e5756efb ILT |
391 | class Binary_ ## NAME : public Binary_expression \ |
392 | { \ | |
393 | public: \ | |
394 | Binary_ ## NAME(Expression* left, Expression* right) \ | |
395 | : Binary_expression(left, right) \ | |
396 | { } \ | |
397 | \ | |
398 | uint64_t \ | |
399 | value(const Expression_eval_info* eei) \ | |
400 | { \ | |
77e65537 | 401 | Output_section* left_section; \ |
f6973bdc ILT |
402 | uint64_t left_alignment; \ |
403 | uint64_t left = this->left_value(eei, &left_section, \ | |
404 | &left_alignment); \ | |
77e65537 | 405 | Output_section* right_section; \ |
f6973bdc ILT |
406 | uint64_t right_alignment; \ |
407 | uint64_t right = this->right_value(eei, &right_section, \ | |
408 | &right_alignment); \ | |
77e65537 | 409 | if (KEEP_RIGHT && left_section == NULL && right_section != NULL) \ |
f6973bdc | 410 | { \ |
bacff3ab NC |
411 | if (eei->result_section_pointer != NULL) \ |
412 | *eei->result_section_pointer = right_section; \ | |
f6973bdc ILT |
413 | if (eei->result_alignment_pointer != NULL) \ |
414 | *eei->result_alignment_pointer = right_alignment; \ | |
415 | } \ | |
77e65537 ILT |
416 | else if (KEEP_LEFT \ |
417 | && left_section != NULL \ | |
418 | && right_section == NULL) \ | |
f6973bdc | 419 | { \ |
bacff3ab NC |
420 | if (eei->result_section_pointer != NULL) \ |
421 | *eei->result_section_pointer = left_section; \ | |
f6973bdc ILT |
422 | if (eei->result_alignment_pointer != NULL) \ |
423 | *eei->result_alignment_pointer = right_alignment; \ | |
424 | } \ | |
77e65537 ILT |
425 | else if ((WARN || left_section != right_section) \ |
426 | && (left_section != NULL || right_section != NULL) \ | |
8851ecca | 427 | && parameters->options().relocatable()) \ |
77e65537 ILT |
428 | gold_warning(_("binary " #NAME " applied to section " \ |
429 | "relative value")); \ | |
430 | if (IS_DIV && right == 0) \ | |
431 | { \ | |
432 | gold_error(_(#NAME " by zero")); \ | |
433 | return 0; \ | |
434 | } \ | |
435 | return left OPERATOR right; \ | |
494e05f4 ILT |
436 | } \ |
437 | \ | |
438 | void \ | |
439 | print(FILE* f) const \ | |
440 | { \ | |
441 | fprintf(f, "("); \ | |
442 | this->left_print(f); \ | |
443 | fprintf(f, " %s ", #OPERATOR); \ | |
444 | this->right_print(f); \ | |
445 | fprintf(f, ")"); \ | |
e5756efb ILT |
446 | } \ |
447 | }; \ | |
448 | \ | |
449 | extern "C" Expression* \ | |
450 | script_exp_binary_ ## NAME(Expression* left, Expression* right) \ | |
451 | { \ | |
452 | return new Binary_ ## NAME(left, right); \ | |
453 | } | |
454 | ||
77e65537 ILT |
455 | BINARY_EXPRESSION(mult, *, false, false, false, true) |
456 | BINARY_EXPRESSION(div, /, false, false, true, true) | |
457 | BINARY_EXPRESSION(mod, %, false, false, true, true) | |
458 | BINARY_EXPRESSION(add, +, true, true, false, true) | |
459 | BINARY_EXPRESSION(sub, -, true, false, false, false) | |
460 | BINARY_EXPRESSION(lshift, <<, false, false, false, true) | |
461 | BINARY_EXPRESSION(rshift, >>, false, false, false, true) | |
462 | BINARY_EXPRESSION(eq, ==, false, false, false, false) | |
463 | BINARY_EXPRESSION(ne, !=, false, false, false, false) | |
464 | BINARY_EXPRESSION(le, <=, false, false, false, false) | |
465 | BINARY_EXPRESSION(ge, >=, false, false, false, false) | |
466 | BINARY_EXPRESSION(lt, <, false, false, false, false) | |
467 | BINARY_EXPRESSION(gt, >, false, false, false, false) | |
468 | BINARY_EXPRESSION(bitwise_and, &, true, true, false, true) | |
469 | BINARY_EXPRESSION(bitwise_xor, ^, true, true, false, true) | |
470 | BINARY_EXPRESSION(bitwise_or, |, true, true, false, true) | |
471 | BINARY_EXPRESSION(logical_and, &&, false, false, false, true) | |
472 | BINARY_EXPRESSION(logical_or, ||, false, false, false, true) | |
e5756efb ILT |
473 | |
474 | // A trinary expression. | |
475 | ||
476 | class Trinary_expression : public Expression | |
477 | { | |
478 | public: | |
479 | Trinary_expression(Expression* arg1, Expression* arg2, Expression* arg3) | |
480 | : arg1_(arg1), arg2_(arg2), arg3_(arg3) | |
481 | { } | |
482 | ||
483 | ~Trinary_expression() | |
484 | { | |
485 | delete this->arg1_; | |
486 | delete this->arg2_; | |
487 | delete this->arg3_; | |
488 | } | |
489 | ||
490 | protected: | |
491 | uint64_t | |
77e65537 ILT |
492 | arg1_value(const Expression_eval_info* eei, |
493 | Output_section** section_pointer) const | |
494 | { | |
495 | return this->arg1_->eval_maybe_dot(eei->symtab, eei->layout, | |
919ed24c | 496 | eei->check_assertions, |
77e65537 ILT |
497 | eei->is_dot_available, |
498 | eei->dot_value, | |
499 | eei->dot_section, | |
f6973bdc ILT |
500 | section_pointer, |
501 | NULL); | |
77e65537 | 502 | } |
e5756efb ILT |
503 | |
504 | uint64_t | |
77e65537 | 505 | arg2_value(const Expression_eval_info* eei, |
f6973bdc ILT |
506 | Output_section** section_pointer, |
507 | uint64_t* alignment_pointer) const | |
77e65537 ILT |
508 | { |
509 | return this->arg1_->eval_maybe_dot(eei->symtab, eei->layout, | |
919ed24c | 510 | eei->check_assertions, |
77e65537 ILT |
511 | eei->is_dot_available, |
512 | eei->dot_value, | |
513 | eei->dot_section, | |
f6973bdc ILT |
514 | section_pointer, |
515 | alignment_pointer); | |
77e65537 | 516 | } |
e5756efb ILT |
517 | |
518 | uint64_t | |
77e65537 | 519 | arg3_value(const Expression_eval_info* eei, |
f6973bdc ILT |
520 | Output_section** section_pointer, |
521 | uint64_t* alignment_pointer) const | |
77e65537 ILT |
522 | { |
523 | return this->arg1_->eval_maybe_dot(eei->symtab, eei->layout, | |
919ed24c | 524 | eei->check_assertions, |
77e65537 ILT |
525 | eei->is_dot_available, |
526 | eei->dot_value, | |
527 | eei->dot_section, | |
f6973bdc ILT |
528 | section_pointer, |
529 | alignment_pointer); | |
77e65537 | 530 | } |
e5756efb | 531 | |
494e05f4 ILT |
532 | void |
533 | arg1_print(FILE* f) const | |
534 | { this->arg1_->print(f); } | |
535 | ||
536 | void | |
537 | arg2_print(FILE* f) const | |
538 | { this->arg2_->print(f); } | |
539 | ||
540 | void | |
541 | arg3_print(FILE* f) const | |
542 | { this->arg3_->print(f); } | |
543 | ||
e5756efb ILT |
544 | private: |
545 | Expression* arg1_; | |
546 | Expression* arg2_; | |
547 | Expression* arg3_; | |
548 | }; | |
549 | ||
550 | // The conditional operator. | |
551 | ||
552 | class Trinary_cond : public Trinary_expression | |
553 | { | |
554 | public: | |
555 | Trinary_cond(Expression* arg1, Expression* arg2, Expression* arg3) | |
556 | : Trinary_expression(arg1, arg2, arg3) | |
557 | { } | |
558 | ||
559 | uint64_t | |
560 | value(const Expression_eval_info* eei) | |
561 | { | |
77e65537 ILT |
562 | Output_section* arg1_section; |
563 | uint64_t arg1 = this->arg1_value(eei, &arg1_section); | |
564 | return (arg1 | |
f6973bdc ILT |
565 | ? this->arg2_value(eei, eei->result_section_pointer, |
566 | eei->result_alignment_pointer) | |
567 | : this->arg3_value(eei, eei->result_section_pointer, | |
568 | eei->result_alignment_pointer)); | |
e5756efb | 569 | } |
494e05f4 ILT |
570 | |
571 | void | |
572 | print(FILE* f) const | |
573 | { | |
574 | fprintf(f, "("); | |
575 | this->arg1_print(f); | |
576 | fprintf(f, " ? "); | |
577 | this->arg2_print(f); | |
578 | fprintf(f, " : "); | |
579 | this->arg3_print(f); | |
580 | fprintf(f, ")"); | |
581 | } | |
e5756efb ILT |
582 | }; |
583 | ||
584 | extern "C" Expression* | |
585 | script_exp_trinary_cond(Expression* arg1, Expression* arg2, Expression* arg3) | |
586 | { | |
587 | return new Trinary_cond(arg1, arg2, arg3); | |
588 | } | |
589 | ||
590 | // Max function. | |
591 | ||
592 | class Max_expression : public Binary_expression | |
593 | { | |
594 | public: | |
595 | Max_expression(Expression* left, Expression* right) | |
596 | : Binary_expression(left, right) | |
597 | { } | |
598 | ||
599 | uint64_t | |
600 | value(const Expression_eval_info* eei) | |
77e65537 ILT |
601 | { |
602 | Output_section* left_section; | |
f6973bdc ILT |
603 | uint64_t left_alignment; |
604 | uint64_t left = this->left_value(eei, &left_section, &left_alignment); | |
77e65537 | 605 | Output_section* right_section; |
f6973bdc ILT |
606 | uint64_t right_alignment; |
607 | uint64_t right = this->right_value(eei, &right_section, &right_alignment); | |
77e65537 | 608 | if (left_section == right_section) |
bacff3ab NC |
609 | { |
610 | if (eei->result_section_pointer != NULL) | |
611 | *eei->result_section_pointer = left_section; | |
612 | } | |
77e65537 | 613 | else if ((left_section != NULL || right_section != NULL) |
8851ecca | 614 | && parameters->options().relocatable()) |
77e65537 | 615 | gold_warning(_("max applied to section relative value")); |
f6973bdc ILT |
616 | if (eei->result_alignment_pointer != NULL) |
617 | { | |
618 | uint64_t ra = *eei->result_alignment_pointer; | |
619 | if (left > right) | |
620 | ra = std::max(ra, left_alignment); | |
621 | else if (right > left) | |
622 | ra = std::max(ra, right_alignment); | |
623 | else | |
624 | ra = std::max(ra, std::max(left_alignment, right_alignment)); | |
625 | *eei->result_alignment_pointer = ra; | |
626 | } | |
77e65537 ILT |
627 | return std::max(left, right); |
628 | } | |
494e05f4 ILT |
629 | |
630 | void | |
631 | print(FILE* f) const | |
632 | { this->print_function(f, "MAX"); } | |
e5756efb ILT |
633 | }; |
634 | ||
635 | extern "C" Expression* | |
636 | script_exp_function_max(Expression* left, Expression* right) | |
637 | { | |
638 | return new Max_expression(left, right); | |
639 | } | |
640 | ||
641 | // Min function. | |
642 | ||
643 | class Min_expression : public Binary_expression | |
644 | { | |
645 | public: | |
646 | Min_expression(Expression* left, Expression* right) | |
647 | : Binary_expression(left, right) | |
648 | { } | |
649 | ||
650 | uint64_t | |
651 | value(const Expression_eval_info* eei) | |
77e65537 ILT |
652 | { |
653 | Output_section* left_section; | |
f6973bdc ILT |
654 | uint64_t left_alignment; |
655 | uint64_t left = this->left_value(eei, &left_section, &left_alignment); | |
77e65537 | 656 | Output_section* right_section; |
f6973bdc ILT |
657 | uint64_t right_alignment; |
658 | uint64_t right = this->right_value(eei, &right_section, &right_alignment); | |
77e65537 | 659 | if (left_section == right_section) |
bacff3ab NC |
660 | { |
661 | if (eei->result_section_pointer != NULL) | |
662 | *eei->result_section_pointer = left_section; | |
663 | } | |
77e65537 | 664 | else if ((left_section != NULL || right_section != NULL) |
8851ecca | 665 | && parameters->options().relocatable()) |
77e65537 | 666 | gold_warning(_("min applied to section relative value")); |
f6973bdc ILT |
667 | if (eei->result_alignment_pointer != NULL) |
668 | { | |
669 | uint64_t ra = *eei->result_alignment_pointer; | |
670 | if (left < right) | |
671 | ra = std::max(ra, left_alignment); | |
672 | else if (right < left) | |
673 | ra = std::max(ra, right_alignment); | |
674 | else | |
675 | ra = std::max(ra, std::max(left_alignment, right_alignment)); | |
676 | *eei->result_alignment_pointer = ra; | |
677 | } | |
77e65537 ILT |
678 | return std::min(left, right); |
679 | } | |
494e05f4 ILT |
680 | |
681 | void | |
682 | print(FILE* f) const | |
683 | { this->print_function(f, "MIN"); } | |
e5756efb ILT |
684 | }; |
685 | ||
686 | extern "C" Expression* | |
687 | script_exp_function_min(Expression* left, Expression* right) | |
688 | { | |
689 | return new Min_expression(left, right); | |
690 | } | |
691 | ||
7508a093 ILT |
692 | // Class Section_expression. This is a parent class used for |
693 | // functions which take the name of an output section. | |
694 | ||
695 | class Section_expression : public Expression | |
696 | { | |
697 | public: | |
698 | Section_expression(const char* section_name, size_t section_name_len) | |
699 | : section_name_(section_name, section_name_len) | |
700 | { } | |
701 | ||
702 | uint64_t | |
703 | value(const Expression_eval_info*); | |
704 | ||
705 | void | |
706 | print(FILE* f) const | |
707 | { fprintf(f, "%s(%s)", this->function_name(), this->section_name_.c_str()); } | |
708 | ||
709 | protected: | |
710 | // The child class must implement this. | |
711 | virtual uint64_t | |
712 | value_from_output_section(const Expression_eval_info*, | |
713 | Output_section*) = 0; | |
714 | ||
8f2eb564 ILT |
715 | // The child class must implement this. |
716 | virtual uint64_t | |
717 | value_from_script_output_section(uint64_t address, uint64_t load_address, | |
718 | uint64_t addralign, uint64_t size) = 0; | |
719 | ||
7508a093 ILT |
720 | // The child class must implement this. |
721 | virtual const char* | |
722 | function_name() const = 0; | |
723 | ||
724 | private: | |
725 | std::string section_name_; | |
726 | }; | |
727 | ||
728 | uint64_t | |
729 | Section_expression::value(const Expression_eval_info* eei) | |
730 | { | |
731 | const char* section_name = this->section_name_.c_str(); | |
732 | Output_section* os = eei->layout->find_output_section(section_name); | |
8f2eb564 ILT |
733 | if (os != NULL) |
734 | return this->value_from_output_section(eei, os); | |
735 | ||
736 | uint64_t address; | |
737 | uint64_t load_address; | |
738 | uint64_t addralign; | |
739 | uint64_t size; | |
740 | const Script_options* ss = eei->layout->script_options(); | |
741 | if (ss->saw_sections_clause()) | |
7508a093 | 742 | { |
8f2eb564 ILT |
743 | if (ss->script_sections()->get_output_section_info(section_name, |
744 | &address, | |
745 | &load_address, | |
746 | &addralign, | |
747 | &size)) | |
748 | return this->value_from_script_output_section(address, load_address, | |
749 | addralign, size); | |
7508a093 ILT |
750 | } |
751 | ||
8f2eb564 ILT |
752 | gold_error("%s called on nonexistent output section '%s'", |
753 | this->function_name(), section_name); | |
754 | return 0; | |
7508a093 ILT |
755 | } |
756 | ||
3edc73f2 ILT |
757 | // ABSOLUTE function. |
758 | ||
759 | class Absolute_expression : public Unary_expression | |
760 | { | |
761 | public: | |
762 | Absolute_expression(Expression* arg) | |
763 | : Unary_expression(arg) | |
764 | { } | |
765 | ||
766 | uint64_t | |
767 | value(const Expression_eval_info* eei) | |
768 | { | |
bacff3ab | 769 | uint64_t ret = this->arg_value(eei, NULL); |
3edc73f2 | 770 | // Force the value to be absolute. |
bacff3ab NC |
771 | if (eei->result_section_pointer != NULL) |
772 | *eei->result_section_pointer = NULL; | |
3edc73f2 ILT |
773 | return ret; |
774 | } | |
775 | ||
776 | void | |
777 | print(FILE* f) const | |
778 | { | |
779 | fprintf(f, "ABSOLUTE("); | |
780 | this->arg_print(f); | |
781 | fprintf(f, ")"); | |
782 | } | |
783 | }; | |
784 | ||
785 | extern "C" Expression* | |
786 | script_exp_function_absolute(Expression* arg) | |
787 | { | |
788 | return new Absolute_expression(arg); | |
789 | } | |
790 | ||
791 | // ALIGN function. | |
e5756efb ILT |
792 | |
793 | class Align_expression : public Binary_expression | |
794 | { | |
795 | public: | |
796 | Align_expression(Expression* left, Expression* right) | |
797 | : Binary_expression(left, right) | |
798 | { } | |
799 | ||
800 | uint64_t | |
801 | value(const Expression_eval_info* eei) | |
802 | { | |
77e65537 | 803 | Output_section* align_section; |
f6973bdc | 804 | uint64_t align = this->right_value(eei, &align_section, NULL); |
77e65537 | 805 | if (align_section != NULL |
8851ecca | 806 | && parameters->options().relocatable()) |
77e65537 ILT |
807 | gold_warning(_("aligning to section relative value")); |
808 | ||
f6973bdc ILT |
809 | if (eei->result_alignment_pointer != NULL |
810 | && align > *eei->result_alignment_pointer) | |
811 | { | |
812 | uint64_t a = align; | |
813 | while ((a & (a - 1)) != 0) | |
814 | a &= a - 1; | |
815 | *eei->result_alignment_pointer = a; | |
816 | } | |
817 | ||
818 | uint64_t value = this->left_value(eei, eei->result_section_pointer, NULL); | |
e5756efb | 819 | if (align <= 1) |
2ea97941 ILT |
820 | return value; |
821 | return ((value + align - 1) / align) * align; | |
e5756efb | 822 | } |
494e05f4 ILT |
823 | |
824 | void | |
825 | print(FILE* f) const | |
826 | { this->print_function(f, "ALIGN"); } | |
e5756efb ILT |
827 | }; |
828 | ||
829 | extern "C" Expression* | |
830 | script_exp_function_align(Expression* left, Expression* right) | |
831 | { | |
832 | return new Align_expression(left, right); | |
833 | } | |
834 | ||
3edc73f2 | 835 | // ASSERT function. |
e5756efb ILT |
836 | |
837 | class Assert_expression : public Unary_expression | |
838 | { | |
839 | public: | |
840 | Assert_expression(Expression* arg, const char* message, size_t length) | |
841 | : Unary_expression(arg), message_(message, length) | |
842 | { } | |
843 | ||
844 | uint64_t | |
845 | value(const Expression_eval_info* eei) | |
846 | { | |
2ea97941 ILT |
847 | uint64_t value = this->arg_value(eei, eei->result_section_pointer); |
848 | if (!value && eei->check_assertions) | |
e5756efb | 849 | gold_error("%s", this->message_.c_str()); |
2ea97941 | 850 | return value; |
e5756efb ILT |
851 | } |
852 | ||
494e05f4 ILT |
853 | void |
854 | print(FILE* f) const | |
855 | { | |
856 | fprintf(f, "ASSERT("); | |
857 | this->arg_print(f); | |
858 | fprintf(f, ", %s)", this->message_.c_str()); | |
859 | } | |
860 | ||
e5756efb ILT |
861 | private: |
862 | std::string message_; | |
863 | }; | |
864 | ||
865 | extern "C" Expression* | |
866 | script_exp_function_assert(Expression* expr, const char* message, | |
867 | size_t length) | |
868 | { | |
869 | return new Assert_expression(expr, message, length); | |
870 | } | |
871 | ||
7508a093 | 872 | // ADDR function. |
494e05f4 | 873 | |
7508a093 | 874 | class Addr_expression : public Section_expression |
494e05f4 ILT |
875 | { |
876 | public: | |
877 | Addr_expression(const char* section_name, size_t section_name_len) | |
7508a093 | 878 | : Section_expression(section_name, section_name_len) |
494e05f4 ILT |
879 | { } |
880 | ||
7508a093 | 881 | protected: |
494e05f4 | 882 | uint64_t |
3edc73f2 | 883 | value_from_output_section(const Expression_eval_info* eei, |
7508a093 ILT |
884 | Output_section* os) |
885 | { | |
bacff3ab NC |
886 | if (eei->result_section_pointer != NULL) |
887 | *eei->result_section_pointer = os; | |
7508a093 ILT |
888 | return os->address(); |
889 | } | |
494e05f4 | 890 | |
8f2eb564 ILT |
891 | uint64_t |
892 | value_from_script_output_section(uint64_t address, uint64_t, uint64_t, | |
893 | uint64_t) | |
894 | { return address; } | |
895 | ||
7508a093 ILT |
896 | const char* |
897 | function_name() const | |
898 | { return "ADDR"; } | |
494e05f4 ILT |
899 | }; |
900 | ||
494e05f4 ILT |
901 | extern "C" Expression* |
902 | script_exp_function_addr(const char* section_name, size_t section_name_len) | |
903 | { | |
904 | return new Addr_expression(section_name, section_name_len); | |
905 | } | |
906 | ||
3edc73f2 ILT |
907 | // ALIGNOF. |
908 | ||
909 | class Alignof_expression : public Section_expression | |
910 | { | |
911 | public: | |
912 | Alignof_expression(const char* section_name, size_t section_name_len) | |
913 | : Section_expression(section_name, section_name_len) | |
914 | { } | |
915 | ||
916 | protected: | |
917 | uint64_t | |
918 | value_from_output_section(const Expression_eval_info*, | |
919 | Output_section* os) | |
920 | { return os->addralign(); } | |
921 | ||
8f2eb564 ILT |
922 | uint64_t |
923 | value_from_script_output_section(uint64_t, uint64_t, uint64_t addralign, | |
924 | uint64_t) | |
925 | { return addralign; } | |
926 | ||
3edc73f2 ILT |
927 | const char* |
928 | function_name() const | |
929 | { return "ALIGNOF"; } | |
930 | }; | |
931 | ||
932 | extern "C" Expression* | |
933 | script_exp_function_alignof(const char* section_name, size_t section_name_len) | |
934 | { | |
935 | return new Alignof_expression(section_name, section_name_len); | |
936 | } | |
937 | ||
3802b2dd ILT |
938 | // CONSTANT. It would be nice if we could simply evaluate this |
939 | // immediately and return an Integer_expression, but unfortunately we | |
940 | // don't know the target. | |
941 | ||
942 | class Constant_expression : public Expression | |
943 | { | |
944 | public: | |
945 | Constant_expression(const char* name, size_t length); | |
946 | ||
947 | uint64_t | |
948 | value(const Expression_eval_info*); | |
949 | ||
950 | void | |
951 | print(FILE* f) const; | |
952 | ||
953 | private: | |
954 | enum Constant_function | |
955 | { | |
956 | CONSTANT_MAXPAGESIZE, | |
957 | CONSTANT_COMMONPAGESIZE | |
958 | }; | |
e5756efb | 959 | |
3802b2dd ILT |
960 | Constant_function function_; |
961 | }; | |
962 | ||
963 | Constant_expression::Constant_expression(const char* name, size_t length) | |
964 | { | |
965 | if (length == 11 && strncmp(name, "MAXPAGESIZE", length) == 0) | |
966 | this->function_ = CONSTANT_MAXPAGESIZE; | |
967 | else if (length == 14 && strncmp(name, "COMMONPAGESIZE", length) == 0) | |
968 | this->function_ = CONSTANT_COMMONPAGESIZE; | |
969 | else | |
970 | { | |
971 | std::string s(name, length); | |
972 | gold_error(_("unknown constant %s"), s.c_str()); | |
973 | this->function_ = CONSTANT_MAXPAGESIZE; | |
974 | } | |
975 | } | |
976 | ||
977 | uint64_t | |
978 | Constant_expression::value(const Expression_eval_info*) | |
979 | { | |
980 | switch (this->function_) | |
981 | { | |
982 | case CONSTANT_MAXPAGESIZE: | |
8851ecca | 983 | return parameters->target().abi_pagesize(); |
3802b2dd | 984 | case CONSTANT_COMMONPAGESIZE: |
8851ecca | 985 | return parameters->target().common_pagesize(); |
3802b2dd ILT |
986 | default: |
987 | gold_unreachable(); | |
988 | } | |
989 | } | |
990 | ||
991 | void | |
992 | Constant_expression::print(FILE* f) const | |
993 | { | |
994 | const char* name; | |
995 | switch (this->function_) | |
996 | { | |
997 | case CONSTANT_MAXPAGESIZE: | |
998 | name = "MAXPAGESIZE"; | |
999 | break; | |
1000 | case CONSTANT_COMMONPAGESIZE: | |
1001 | name = "COMMONPAGESIZE"; | |
1002 | break; | |
1003 | default: | |
1004 | gold_unreachable(); | |
1005 | } | |
1006 | fprintf(f, "CONSTANT(%s)", name); | |
1007 | } | |
1008 | ||
e5756efb | 1009 | extern "C" Expression* |
3802b2dd | 1010 | script_exp_function_constant(const char* name, size_t length) |
e5756efb | 1011 | { |
3802b2dd | 1012 | return new Constant_expression(name, length); |
e5756efb ILT |
1013 | } |
1014 | ||
3802b2dd ILT |
1015 | // DATA_SEGMENT_ALIGN. FIXME: we don't implement this; we always fall |
1016 | // back to the general case. | |
1017 | ||
e5756efb | 1018 | extern "C" Expression* |
3802b2dd | 1019 | script_exp_function_data_segment_align(Expression* left, Expression*) |
e5756efb | 1020 | { |
3802b2dd ILT |
1021 | Expression* e1 = script_exp_function_align(script_exp_string(".", 1), left); |
1022 | Expression* e2 = script_exp_binary_sub(left, script_exp_integer(1)); | |
1023 | Expression* e3 = script_exp_binary_bitwise_and(script_exp_string(".", 1), | |
1024 | e2); | |
1025 | return script_exp_binary_add(e1, e3); | |
e5756efb ILT |
1026 | } |
1027 | ||
3802b2dd ILT |
1028 | // DATA_SEGMENT_RELRO. FIXME: This is not implemented. |
1029 | ||
e5756efb | 1030 | extern "C" Expression* |
3802b2dd | 1031 | script_exp_function_data_segment_relro_end(Expression*, Expression* right) |
e5756efb | 1032 | { |
3802b2dd | 1033 | return right; |
e5756efb ILT |
1034 | } |
1035 | ||
3802b2dd ILT |
1036 | // DATA_SEGMENT_END. FIXME: This is not implemented. |
1037 | ||
e5756efb | 1038 | extern "C" Expression* |
3802b2dd | 1039 | script_exp_function_data_segment_end(Expression* val) |
e5756efb | 1040 | { |
3802b2dd ILT |
1041 | return val; |
1042 | } | |
1043 | ||
3edc73f2 ILT |
1044 | // DEFINED function. |
1045 | ||
1046 | class Defined_expression : public Expression | |
1047 | { | |
1048 | public: | |
1049 | Defined_expression(const char* symbol_name, size_t symbol_name_len) | |
1050 | : symbol_name_(symbol_name, symbol_name_len) | |
1051 | { } | |
1052 | ||
1053 | uint64_t | |
1054 | value(const Expression_eval_info* eei) | |
1055 | { | |
1056 | Symbol* sym = eei->symtab->lookup(this->symbol_name_.c_str()); | |
1057 | return sym != NULL && sym->is_defined(); | |
1058 | } | |
1059 | ||
1060 | void | |
1061 | print(FILE* f) const | |
1062 | { fprintf(f, "DEFINED(%s)", this->symbol_name_.c_str()); } | |
1063 | ||
1064 | private: | |
1065 | std::string symbol_name_; | |
1066 | }; | |
1067 | ||
1068 | extern "C" Expression* | |
1069 | script_exp_function_defined(const char* symbol_name, size_t symbol_name_len) | |
1070 | { | |
1071 | return new Defined_expression(symbol_name, symbol_name_len); | |
1072 | } | |
1073 | ||
7508a093 ILT |
1074 | // LOADADDR function |
1075 | ||
1076 | class Loadaddr_expression : public Section_expression | |
1077 | { | |
1078 | public: | |
1079 | Loadaddr_expression(const char* section_name, size_t section_name_len) | |
1080 | : Section_expression(section_name, section_name_len) | |
1081 | { } | |
1082 | ||
1083 | protected: | |
1084 | uint64_t | |
3edc73f2 | 1085 | value_from_output_section(const Expression_eval_info* eei, |
7508a093 ILT |
1086 | Output_section* os) |
1087 | { | |
1088 | if (os->has_load_address()) | |
1089 | return os->load_address(); | |
1090 | else | |
1091 | { | |
bacff3ab NC |
1092 | if (eei->result_section_pointer != NULL) |
1093 | *eei->result_section_pointer = os; | |
7508a093 ILT |
1094 | return os->address(); |
1095 | } | |
1096 | } | |
1097 | ||
8f2eb564 ILT |
1098 | uint64_t |
1099 | value_from_script_output_section(uint64_t, uint64_t load_address, uint64_t, | |
1100 | uint64_t) | |
1101 | { return load_address; } | |
1102 | ||
7508a093 ILT |
1103 | const char* |
1104 | function_name() const | |
1105 | { return "LOADADDR"; } | |
1106 | }; | |
1107 | ||
1108 | extern "C" Expression* | |
1109 | script_exp_function_loadaddr(const char* section_name, size_t section_name_len) | |
1110 | { | |
1111 | return new Loadaddr_expression(section_name, section_name_len); | |
1112 | } | |
1113 | ||
1114 | // SIZEOF function | |
1115 | ||
1116 | class Sizeof_expression : public Section_expression | |
1117 | { | |
1118 | public: | |
1119 | Sizeof_expression(const char* section_name, size_t section_name_len) | |
1120 | : Section_expression(section_name, section_name_len) | |
1121 | { } | |
1122 | ||
1123 | protected: | |
1124 | uint64_t | |
3edc73f2 | 1125 | value_from_output_section(const Expression_eval_info*, |
7508a093 ILT |
1126 | Output_section* os) |
1127 | { | |
1128 | // We can not use data_size here, as the size of the section may | |
1129 | // not have been finalized. Instead we get whatever the current | |
1130 | // size is. This will work correctly for backward references in | |
1131 | // linker scripts. | |
1132 | return os->current_data_size(); | |
1133 | } | |
1134 | ||
8f2eb564 ILT |
1135 | uint64_t |
1136 | value_from_script_output_section(uint64_t, uint64_t, uint64_t, | |
1137 | uint64_t size) | |
1138 | { return size; } | |
1139 | ||
7508a093 ILT |
1140 | const char* |
1141 | function_name() const | |
1142 | { return "SIZEOF"; } | |
1143 | }; | |
1144 | ||
1145 | extern "C" Expression* | |
1146 | script_exp_function_sizeof(const char* section_name, size_t section_name_len) | |
1147 | { | |
1148 | return new Sizeof_expression(section_name, section_name_len); | |
1149 | } | |
1150 | ||
3802b2dd ILT |
1151 | // SIZEOF_HEADERS. |
1152 | ||
1153 | class Sizeof_headers_expression : public Expression | |
1154 | { | |
1155 | public: | |
1156 | Sizeof_headers_expression() | |
1157 | { } | |
1158 | ||
1159 | uint64_t | |
1160 | value(const Expression_eval_info*); | |
1161 | ||
1162 | void | |
1163 | print(FILE* f) const | |
1164 | { fprintf(f, "SIZEOF_HEADERS"); } | |
1165 | }; | |
1166 | ||
1167 | uint64_t | |
1168 | Sizeof_headers_expression::value(const Expression_eval_info* eei) | |
1169 | { | |
1170 | unsigned int ehdr_size; | |
1171 | unsigned int phdr_size; | |
8851ecca | 1172 | if (parameters->target().get_size() == 32) |
3802b2dd ILT |
1173 | { |
1174 | ehdr_size = elfcpp::Elf_sizes<32>::ehdr_size; | |
1175 | phdr_size = elfcpp::Elf_sizes<32>::phdr_size; | |
1176 | } | |
8851ecca | 1177 | else if (parameters->target().get_size() == 64) |
3802b2dd ILT |
1178 | { |
1179 | ehdr_size = elfcpp::Elf_sizes<64>::ehdr_size; | |
1180 | phdr_size = elfcpp::Elf_sizes<64>::phdr_size; | |
1181 | } | |
1182 | else | |
1183 | gold_unreachable(); | |
1184 | ||
1185 | return ehdr_size + phdr_size * eei->layout->expected_segment_count(); | |
e5756efb ILT |
1186 | } |
1187 | ||
e5756efb | 1188 | extern "C" Expression* |
3802b2dd | 1189 | script_exp_function_sizeof_headers() |
e5756efb | 1190 | { |
3802b2dd | 1191 | return new Sizeof_headers_expression(); |
e5756efb ILT |
1192 | } |
1193 | ||
3c12dcdb DK |
1194 | // SEGMENT_START. |
1195 | ||
1196 | class Segment_start_expression : public Unary_expression | |
1197 | { | |
1198 | public: | |
1199 | Segment_start_expression(const char* segment_name, size_t segment_name_len, | |
1200 | Expression* default_value) | |
1201 | : Unary_expression(default_value), | |
1202 | segment_name_(segment_name, segment_name_len) | |
1203 | { } | |
1204 | ||
1205 | uint64_t | |
1206 | value(const Expression_eval_info*); | |
1207 | ||
1208 | void | |
1209 | print(FILE* f) const | |
1210 | { | |
1211 | fprintf(f, "SEGMENT_START(\"%s\", ", this->segment_name_.c_str()); | |
1212 | this->arg_print(f); | |
1213 | fprintf(f, ")"); | |
1214 | } | |
1215 | ||
1216 | private: | |
1217 | std::string segment_name_; | |
1218 | }; | |
1219 | ||
1220 | uint64_t | |
1221 | Segment_start_expression::value(const Expression_eval_info* eei) | |
1222 | { | |
1223 | // Check for command line overrides. | |
1224 | if (parameters->options().user_set_Ttext() | |
1225 | && this->segment_name_ == ".text") | |
1226 | return parameters->options().Ttext(); | |
1227 | else if (parameters->options().user_set_Tdata() | |
1228 | && this->segment_name_ == ".data") | |
1229 | return parameters->options().Tdata(); | |
1230 | else if (parameters->options().user_set_Tbss() | |
1231 | && this->segment_name_ == ".bss") | |
1232 | return parameters->options().Tbss(); | |
1233 | else | |
1234 | { | |
bacff3ab | 1235 | uint64_t ret = this->arg_value(eei, NULL); |
3c12dcdb | 1236 | // Force the value to be absolute. |
bacff3ab NC |
1237 | if (eei->result_section_pointer != NULL) |
1238 | *eei->result_section_pointer = NULL; | |
3c12dcdb DK |
1239 | return ret; |
1240 | } | |
1241 | } | |
3802b2dd | 1242 | |
e5756efb | 1243 | extern "C" Expression* |
3c12dcdb DK |
1244 | script_exp_function_segment_start(const char* segment_name, |
1245 | size_t segment_name_len, | |
1246 | Expression* default_value) | |
e5756efb | 1247 | { |
3c12dcdb DK |
1248 | return new Segment_start_expression(segment_name, segment_name_len, |
1249 | default_value); | |
e5756efb ILT |
1250 | } |
1251 | ||
e5756efb | 1252 | } // End namespace gold. |