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28f540f4 RM |
1 | /* Support macros for making weak and strong aliases for symbols, |
2 | and for using symbol sets and linker warnings with GNU ld. | |
5536dfcb RM |
3 | Copyright (C) 1995-1998,2000-2003,2004,2005,2006 |
4 | Free Software Foundation, Inc. | |
5290baf0 | 5 | This file is part of the GNU C Library. |
28f540f4 | 6 | |
5290baf0 | 7 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
8 | modify it under the terms of the GNU Lesser General Public |
9 | License as published by the Free Software Foundation; either | |
10 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 11 | |
5290baf0 UD |
12 | The GNU C Library is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 15 | Lesser General Public License for more details. |
28f540f4 | 16 | |
41bdb6e2 AJ |
17 | You should have received a copy of the GNU Lesser General Public |
18 | License along with the GNU C Library; if not, write to the Free | |
19 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
20 | 02111-1307 USA. */ | |
28f540f4 RM |
21 | |
22 | #ifndef _LIBC_SYMBOLS_H | |
5290baf0 | 23 | #define _LIBC_SYMBOLS_H 1 |
28f540f4 RM |
24 | |
25 | /* This file's macros are included implicitly in the compilation of every | |
26 | file in the C library by -imacros. | |
27 | ||
28 | We include config.h which is generated by configure. | |
29 | It should define for us the following symbols: | |
30 | ||
c224a18a RM |
31 | * HAVE_ASM_SET_DIRECTIVE if we have `.set B, A' instead of `A = B'. |
32 | * ASM_GLOBAL_DIRECTIVE with `.globl' or `.global'. | |
b88ac073 RM |
33 | * ASM_TYPE_DIRECTIVE_PREFIX with `@' or `#' or whatever for .type, |
34 | or leave it undefined if there is no .type directive. | |
c224a18a RM |
35 | * HAVE_ELF if using ELF, which supports weak symbols using `.weak'. |
36 | * HAVE_ASM_WEAK_DIRECTIVE if we have weak symbols using `.weak'. | |
37 | * HAVE_ASM_WEAKEXT_DIRECTIVE if we have weak symbols using `.weakext'. | |
28f540f4 RM |
38 | |
39 | */ | |
28f540f4 | 40 | |
92777700 RM |
41 | /* This is defined for the compilation of all C library code. features.h |
42 | tests this to avoid inclusion of stubs.h while compiling the library, | |
43 | before stubs.h has been generated. Some library code that is shared | |
44 | with other packages also tests this symbol to see if it is being | |
45 | compiled as part of the C library. We must define this before including | |
46 | config.h, because it makes some definitions conditional on whether libc | |
47 | itself is being compiled, or just some generator program. */ | |
c709e372 | 48 | #define _LIBC 1 |
92777700 | 49 | |
d3669add RM |
50 | /* Enable declarations of GNU extensions, since we are compiling them. */ |
51 | #define _GNU_SOURCE 1 | |
ec4b0518 UD |
52 | /* And we also need the data for the reentrant functions. */ |
53 | #define _REENTRANT 1 | |
d3669add | 54 | |
92777700 | 55 | #include <config.h> |
28f540f4 | 56 | |
c224a18a | 57 | /* The symbols in all the user (non-_) macros are C symbols. |
57d44131 | 58 | NO HAVE_ELF implies a.out. */ |
28f540f4 | 59 | |
dfd2257a UD |
60 | #if defined HAVE_ASM_WEAK_DIRECTIVE || defined HAVE_ASM_WEAKEXT_DIRECTIVE |
61 | # define HAVE_WEAK_SYMBOLS | |
28f540f4 | 62 | #endif |
28f540f4 RM |
63 | |
64 | #ifndef __SYMBOL_PREFIX | |
dfd2257a UD |
65 | # ifdef NO_UNDERSCORES |
66 | # define __SYMBOL_PREFIX | |
67 | # else | |
68 | # define __SYMBOL_PREFIX "_" | |
69 | # endif | |
28f540f4 RM |
70 | #endif |
71 | ||
72 | #ifndef C_SYMBOL_NAME | |
dfd2257a UD |
73 | # ifdef NO_UNDERSCORES |
74 | # define C_SYMBOL_NAME(name) name | |
75 | # else | |
76 | # define C_SYMBOL_NAME(name) _##name | |
77 | # endif | |
28f540f4 RM |
78 | #endif |
79 | ||
b15cb495 UD |
80 | #ifndef ASM_LINE_SEP |
81 | # define ASM_LINE_SEP ; | |
82 | #endif | |
83 | ||
c843e065 RM |
84 | #ifdef HAVE_ASM_GLOBAL_DOT_NAME |
85 | # ifndef C_SYMBOL_DOT_NAME | |
86 | # if defined __GNUC__ && defined __GNUC_MINOR__ \ | |
87 | && (__GNUC__ << 16) + __GNUC_MINOR__ >= (3 << 16) + 1 | |
88 | # define C_SYMBOL_DOT_NAME(name) .name | |
89 | # else | |
90 | # define C_SYMBOL_DOT_NAME(name) .##name | |
91 | # endif | |
92 | # endif | |
256ba888 UD |
93 | #endif |
94 | ||
428383e8 UD |
95 | #ifndef __ASSEMBLER__ |
96 | /* GCC understands weak symbols and aliases; use its interface where | |
97 | possible, instead of embedded assembly language. */ | |
d02907df | 98 | |
428383e8 | 99 | /* Define ALIASNAME as a strong alias for NAME. */ |
c62f5cab GM |
100 | # define strong_alias(name, aliasname) _strong_alias(name, aliasname) |
101 | # define _strong_alias(name, aliasname) \ | |
428383e8 UD |
102 | extern __typeof (name) aliasname __attribute__ ((alias (#name))); |
103 | ||
104 | /* This comes between the return type and function name in | |
105 | a function definition to make that definition weak. */ | |
106 | # define weak_function __attribute__ ((weak)) | |
107 | # define weak_const_function __attribute__ ((weak, __const__)) | |
108 | ||
109 | # ifdef HAVE_WEAK_SYMBOLS | |
110 | ||
111 | /* Define ALIASNAME as a weak alias for NAME. | |
112 | If weak aliases are not available, this defines a strong alias. */ | |
c62f5cab GM |
113 | # define weak_alias(name, aliasname) _weak_alias (name, aliasname) |
114 | # define _weak_alias(name, aliasname) \ | |
428383e8 UD |
115 | extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))); |
116 | ||
11bf311e UD |
117 | /* Same as WEAK_ALIAS, but mark symbol as hidden. */ |
118 | # define weak_hidden_alias(name, aliasname) \ | |
119 | _weak_hidden_alias (name, aliasname) | |
120 | # define _weak_hidden_alias(name, aliasname) \ | |
121 | extern __typeof (name) aliasname \ | |
122 | __attribute__ ((weak, alias (#name), __visibility__ ("hidden"))); | |
123 | ||
428383e8 | 124 | /* Declare SYMBOL as weak undefined symbol (resolved to 0 if not defined). */ |
40e94df3 UD |
125 | # define weak_extern(symbol) _weak_extern (weak symbol) |
126 | # define _weak_extern(expr) _Pragma (#expr) | |
428383e8 UD |
127 | |
128 | # else | |
129 | ||
130 | # define weak_alias(name, aliasname) strong_alias(name, aliasname) | |
11bf311e | 131 | # define weak_hidden_alias(name, aliasname) strong_alias(name, aliasname) |
428383e8 UD |
132 | # define weak_extern(symbol) /* Nothing. */ |
133 | ||
134 | # endif | |
135 | ||
136 | #else /* __ASSEMBLER__ */ | |
137 | ||
138 | # ifdef HAVE_ASM_SET_DIRECTIVE | |
c843e065 RM |
139 | # ifdef HAVE_ASM_GLOBAL_DOT_NAME |
140 | # define strong_alias(original, alias) \ | |
141 | ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ | |
142 | .set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original) ASM_LINE_SEP \ | |
143 | ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ | |
144 | .set C_SYMBOL_DOT_NAME (alias),C_SYMBOL_DOT_NAME (original) | |
145 | # define strong_data_alias(original, alias) \ | |
146 | ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ | |
28f540f4 | 147 | .set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original) |
c843e065 RM |
148 | # else |
149 | # define strong_alias(original, alias) \ | |
150 | ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ | |
151 | .set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original) | |
152 | # define strong_data_alias(original, alias) strong_alias(original, alias) | |
153 | # endif | |
dfd2257a | 154 | # else |
2aa15430 | 155 | # ifdef HAVE_ASM_GLOBAL_DOT_NAME |
c843e065 RM |
156 | # define strong_alias(original, alias) \ |
157 | ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ | |
158 | C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ | |
159 | ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ | |
2aa15430 | 160 | C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original) |
c843e065 RM |
161 | # define strong_data_alias(original, alias) \ |
162 | ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ | |
163 | C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) | |
2aa15430 | 164 | # else |
c843e065 RM |
165 | # define strong_alias(original, alias) \ |
166 | ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ | |
335aa320 | 167 | C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) |
c843e065 | 168 | # define strong_data_alias(original, alias) strong_alias(original, alias) |
2aa15430 | 169 | # endif |
dfd2257a | 170 | # endif |
d02907df | 171 | |
428383e8 | 172 | # ifdef HAVE_WEAK_SYMBOLS |
dfd2257a | 173 | # ifdef HAVE_ASM_WEAKEXT_DIRECTIVE |
c843e065 RM |
174 | # ifdef HAVE_ASM_GLOBAL_DOT_NAME |
175 | # define weak_alias(original, alias) \ | |
176 | .weakext C_SYMBOL_NAME (alias), C_SYMBOL_NAME (original) ASM_LINE_SEP \ | |
177 | .weakext C_SYMBOL_DOT_NAME (alias), C_SYMBOL_DOT_NAME (original) | |
178 | # else | |
179 | # define weak_alias(original, alias) \ | |
c224a18a | 180 | .weakext C_SYMBOL_NAME (alias), C_SYMBOL_NAME (original) |
c843e065 RM |
181 | # endif |
182 | # define weak_extern(symbol) \ | |
af5b3bc3 | 183 | .weakext C_SYMBOL_NAME (symbol) |
c224a18a | 184 | |
dfd2257a | 185 | # else /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */ |
c224a18a | 186 | |
2aa15430 | 187 | # ifdef HAVE_ASM_GLOBAL_DOT_NAME |
c843e065 RM |
188 | # define weak_alias(original, alias) \ |
189 | .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ | |
190 | C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ | |
191 | .weak C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ | |
2aa15430 UD |
192 | C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original) |
193 | # else | |
c843e065 RM |
194 | # define weak_alias(original, alias) \ |
195 | .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ | |
28f540f4 | 196 | C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) |
2aa15430 | 197 | # endif |
e6964dd4 | 198 | |
c843e065 | 199 | # define weak_extern(symbol) \ |
af5b3bc3 | 200 | .weak C_SYMBOL_NAME (symbol) |
d02907df | 201 | |
dfd2257a | 202 | # endif /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */ |
c224a18a | 203 | |
428383e8 | 204 | # else /* ! HAVE_WEAK_SYMBOLS */ |
af5b3bc3 | 205 | |
428383e8 UD |
206 | # define weak_alias(original, alias) strong_alias(original, alias) |
207 | # define weak_extern(symbol) /* Nothing */ | |
208 | # endif /* ! HAVE_WEAK_SYMBOLS */ | |
af5b3bc3 | 209 | |
428383e8 | 210 | #endif /* __ASSEMBLER__ */ |
958f803f | 211 | |
dfd2257a UD |
212 | /* On some platforms we can make internal function calls (i.e., calls of |
213 | functions not exported) a bit faster by using a different calling | |
214 | convention. */ | |
215 | #ifndef internal_function | |
216 | # define internal_function /* empty */ | |
217 | #endif | |
28f540f4 | 218 | |
a8eab8b1 UD |
219 | /* Prepare for the case that `__builtin_expect' is not available. */ |
220 | #ifndef HAVE_BUILTIN_EXPECT | |
221 | # define __builtin_expect(expr, val) (expr) | |
222 | #endif | |
223 | ||
e862aada UD |
224 | /* Determine the return address. */ |
225 | #define RETURN_ADDRESS(nr) \ | |
226 | __builtin_extract_return_addr (__builtin_return_address (nr)) | |
227 | ||
44c8d1a2 RM |
228 | /* When a reference to SYMBOL is encountered, the linker will emit a |
229 | warning message MSG. */ | |
57d44131 | 230 | #ifdef HAVE_ELF |
fd26970f UD |
231 | |
232 | /* We want the .gnu.warning.SYMBOL section to be unallocated. */ | |
57d44131 UD |
233 | # ifdef HAVE_ASM_PREVIOUS_DIRECTIVE |
234 | # define __make_section_unallocated(section_string) \ | |
b15cb495 | 235 | asm (".section " section_string "\n\t.previous"); |
57d44131 UD |
236 | # elif defined HAVE_ASM_POPSECTION_DIRECTIVE |
237 | # define __make_section_unallocated(section_string) \ | |
b15cb495 | 238 | asm (".pushsection " section_string "\n\t.popsection"); |
57d44131 UD |
239 | # else |
240 | # define __make_section_unallocated(section_string) | |
241 | # endif | |
fd26970f | 242 | |
b15cb495 UD |
243 | /* Tacking on "\n\t#" to the section name makes gcc put it's bogus |
244 | section attributes on what looks like a comment to the assembler. */ | |
57d44131 UD |
245 | # ifdef HAVE_SECTION_QUOTES |
246 | # define __sec_comment "\"\n\t#\"" | |
247 | # else | |
248 | # define __sec_comment "\n\t#" | |
249 | # endif | |
250 | # define link_warning(symbol, msg) \ | |
e26dd47f | 251 | __make_section_unallocated (".gnu.warning." #symbol) \ |
44c8d1a2 | 252 | static const char __evoke_link_warning_##symbol[] \ |
6c5775c3 | 253 | __attribute__ ((used, section (".gnu.warning." #symbol __sec_comment))) \ |
c877418f | 254 | = msg; |
57d44131 | 255 | # define libc_freeres_ptr(decl) \ |
362f5ae2 | 256 | __make_section_unallocated ("__libc_freeres_ptrs, \"aw\", %nobits") \ |
c877418f | 257 | decl __attribute__ ((section ("__libc_freeres_ptrs" __sec_comment))) |
57d44131 | 258 | # define __libc_freeres_fn_section \ |
c877418f | 259 | __attribute__ ((section ("__libc_freeres_fn"))) |
57d44131 UD |
260 | #else /* Not ELF: a.out */ |
261 | # ifdef HAVE_XCOFF | |
5af3245a UD |
262 | /* XCOFF does not support .stabs. |
263 | The native aix linker will remove the .stab and .stabstr sections | |
264 | The gnu linker will have a fatal error if there is a relocation for | |
265 | symbol in the .stab section. Silently disable this macro. */ | |
57d44131 UD |
266 | # define link_warning(symbol, msg) |
267 | # else | |
268 | # define link_warning(symbol, msg) \ | |
5af3245a UD |
269 | asm (".stabs \"" msg "\",30,0,0,0\n\t" \ |
270 | ".stabs \"" __SYMBOL_PREFIX #symbol "\",1,0,0,0\n"); | |
57d44131 | 271 | # endif /* XCOFF */ |
c877418f RM |
272 | # define libc_freeres_ptr(decl) decl |
273 | # define __libc_freeres_fn_section | |
28f540f4 | 274 | #endif |
c877418f RM |
275 | #define libc_freeres_fn(name) \ |
276 | static void name (void) __attribute_used__ __libc_freeres_fn_section; \ | |
277 | text_set_element (__libc_subfreeres, name); \ | |
278 | static void name (void) | |
28f540f4 RM |
279 | |
280 | /* A canned warning for sysdeps/stub functions. */ | |
281 | #define stub_warning(name) \ | |
561bcb80 | 282 | __make_section_unallocated (".gnu.glibc-stub." #name) \ |
44c8d1a2 RM |
283 | link_warning (name, \ |
284 | "warning: " #name " is not implemented and will always fail") | |
5f9e57ba | 285 | |
2f7f7bc6 UD |
286 | /* Warning for linking functions calling dlopen into static binaries. */ |
287 | #ifdef SHARED | |
288 | #define static_link_warning(name) | |
289 | #else | |
290 | #define static_link_warning(name) static_link_warning1(name) | |
291 | #define static_link_warning1(name) \ | |
292 | link_warning(name, "Using '" #name "' in statically linked applications \ | |
293 | requires at runtime the shared libraries from the glibc version used \ | |
294 | for linking") | |
295 | #endif | |
b88ac073 | 296 | |
11bf311e UD |
297 | /* Declare SYMBOL to be TYPE (`function' or `object') of SIZE bytes |
298 | alias to ORIGINAL, when the assembler supports such declarations | |
299 | (such as in ELF). | |
b88ac073 RM |
300 | This is only necessary when defining something in assembly, or playing |
301 | funny alias games where the size should be other than what the compiler | |
302 | thinks it is. */ | |
11bf311e UD |
303 | #define declare_symbol_alias(symbol, original, type, size) \ |
304 | declare_symbol_alias_1 (symbol, original, type, size) | |
b88ac073 RM |
305 | #ifdef ASM_TYPE_DIRECTIVE_PREFIX |
306 | # ifdef __ASSEMBLER__ | |
11bf311e UD |
307 | # define declare_symbol_alias_1(symbol, original, type, size) \ |
308 | strong_alias (original, symbol); \ | |
b88ac073 | 309 | .type C_SYMBOL_NAME (symbol), \ |
11bf311e UD |
310 | declare_symbol_alias_1_paste (ASM_TYPE_DIRECTIVE_PREFIX, type); \ |
311 | .size C_SYMBOL_NAME (symbol), size | |
312 | # define declare_symbol_alias_1_paste(a, b) \ | |
313 | declare_symbol_alias_1_paste_1 (a,b) | |
314 | # define declare_symbol_alias_1_paste_1(a,b) a##b | |
b88ac073 | 315 | # else /* Not __ASSEMBLER__. */ |
11bf311e UD |
316 | # define declare_symbol_alias_1(symbol, original, type, size) \ |
317 | asm (declare_symbol_alias_1_stringify (ASM_GLOBAL_DIRECTIVE) \ | |
318 | " " __SYMBOL_PREFIX #symbol \ | |
319 | "\n\t" declare_symbol_alias_1_alias (symbol, original) \ | |
320 | "\n\t.type " __SYMBOL_PREFIX #symbol ", " \ | |
321 | declare_symbol_alias_1_stringify (ASM_TYPE_DIRECTIVE_PREFIX) #type \ | |
b88ac073 | 322 | "\n\t.size " __SYMBOL_PREFIX #symbol ", " #size); |
11bf311e UD |
323 | # define declare_symbol_alias_1_stringify(x) \ |
324 | declare_symbol_alias_1_stringify_1 (x) | |
325 | # define declare_symbol_alias_1_stringify_1(x) #x | |
326 | # ifdef HAVE_ASM_SET_DIRECTIVE | |
327 | # define declare_symbol_alias_1_alias(symbol, original) \ | |
328 | ".set " __SYMBOL_PREFIX #symbol ", " __SYMBOL_PREFIX #original | |
329 | # else | |
330 | # define declare_symbol_alias_1_alias(symbol, original) \ | |
331 | __SYMBOL_PREFIX #symbol " = " __SYMBOL_PREFIX #original | |
332 | # endif /* HAVE_ASM_SET_DIRECTIVE */ | |
b88ac073 RM |
333 | # endif /* __ASSEMBLER__ */ |
334 | #else | |
335 | # define declare_symbol_1(symbol, type, size) /* Nothing. */ | |
336 | #endif | |
337 | ||
338 | ||
5f9e57ba | 339 | /* |
28f540f4 | 340 | \f |
5f9e57ba RM |
341 | */ |
342 | ||
28f540f4 RM |
343 | /* Symbol set support macros. */ |
344 | ||
57d44131 | 345 | #ifdef HAVE_ELF |
28f540f4 RM |
346 | |
347 | /* Make SYMBOL, which is in the text segment, an element of SET. */ | |
57d44131 | 348 | # define text_set_element(set, symbol) _elf_set_element(set, symbol) |
28f540f4 | 349 | /* Make SYMBOL, which is in the data segment, an element of SET. */ |
57d44131 | 350 | # define data_set_element(set, symbol) _elf_set_element(set, symbol) |
28f540f4 | 351 | /* Make SYMBOL, which is in the bss segment, an element of SET. */ |
57d44131 | 352 | # define bss_set_element(set, symbol) _elf_set_element(set, symbol) |
28f540f4 RM |
353 | |
354 | /* These are all done the same way in ELF. | |
355 | There is a new section created for each set. */ | |
57d44131 | 356 | # ifdef SHARED |
53afa8d9 RM |
357 | /* When building a shared library, make the set section writable, |
358 | because it will need to be relocated at run time anyway. */ | |
57d44131 | 359 | # define _elf_set_element(set, symbol) \ |
53afa8d9 | 360 | static const void *__elf_set_##set##_element_##symbol##__ \ |
6c5775c3 | 361 | __attribute__ ((used, section (#set))) = &(symbol) |
57d44131 UD |
362 | # else |
363 | # define _elf_set_element(set, symbol) \ | |
28f540f4 | 364 | static const void *const __elf_set_##set##_element_##symbol##__ \ |
6c5775c3 | 365 | __attribute__ ((used, section (#set))) = &(symbol) |
57d44131 | 366 | # endif |
28f540f4 RM |
367 | |
368 | /* Define SET as a symbol set. This may be required (it is in a.out) to | |
369 | be able to use the set's contents. */ | |
57d44131 | 370 | # define symbol_set_define(set) symbol_set_declare(set) |
28f540f4 | 371 | |
20792f99 RM |
372 | /* Declare SET for use in this module, if defined in another module. |
373 | In a shared library, this is always local to that shared object. | |
374 | For static linking, the set might be wholly absent and so we use | |
375 | weak references. */ | |
57d44131 | 376 | # define symbol_set_declare(set) \ |
6f1e513d RH |
377 | extern char const __start_##set[] __symbol_set_attribute; \ |
378 | extern char const __stop_##set[] __symbol_set_attribute; | |
57d44131 UD |
379 | # ifdef SHARED |
380 | # define __symbol_set_attribute attribute_hidden | |
381 | # else | |
382 | # define __symbol_set_attribute __attribute__ ((weak)) | |
383 | # endif | |
28f540f4 RM |
384 | |
385 | /* Return a pointer (void *const *) to the first element of SET. */ | |
57d44131 | 386 | # define symbol_set_first_element(set) ((void *const *) (&__start_##set)) |
28f540f4 RM |
387 | |
388 | /* Return true iff PTR (a void *const *) has been incremented | |
389 | past the last element in SET. */ | |
57d44131 | 390 | # define symbol_set_end_p(set, ptr) ((ptr) >= (void *const *) &__stop_##set) |
28f540f4 | 391 | |
57d44131 | 392 | #else /* Not ELF: a.out. */ |
28f540f4 | 393 | |
57d44131 | 394 | # ifdef HAVE_XCOFF |
5af3245a UD |
395 | /* XCOFF does not support .stabs. |
396 | The native aix linker will remove the .stab and .stabstr sections | |
397 | The gnu linker will have a fatal error if there is a relocation for | |
398 | symbol in the .stab section. Silently disable these macros. */ | |
57d44131 UD |
399 | # define text_set_element(set, symbol) |
400 | # define data_set_element(set, symbol) | |
401 | # define bss_set_element(set, symbol) | |
402 | # else | |
403 | # define text_set_element(set, symbol) \ | |
5af3245a | 404 | asm (".stabs \"" __SYMBOL_PREFIX #set "\",23,0,0," __SYMBOL_PREFIX #symbol) |
57d44131 | 405 | # define data_set_element(set, symbol) \ |
5af3245a | 406 | asm (".stabs \"" __SYMBOL_PREFIX #set "\",25,0,0," __SYMBOL_PREFIX #symbol) |
57d44131 UD |
407 | # define bss_set_element(set, symbol) ?error Must use initialized data. |
408 | # endif /* XCOFF */ | |
409 | # define symbol_set_define(set) void *const (set)[1]; | |
a2a89dd6 UD |
410 | # define symbol_set_declare(set) extern void *const (set)[1]; |
411 | ||
412 | # define symbol_set_first_element(set) &(set)[1] | |
413 | # define symbol_set_end_p(set, ptr) (*(ptr) == 0) | |
57d44131 UD |
414 | |
415 | #endif /* ELF. */ | |
28f540f4 | 416 | |
1ea89a40 | 417 | #if DO_VERSIONING |
ebdf53a7 | 418 | # define symbol_version(real, name, version) \ |
8b943b4a | 419 | _symbol_version(real, name, version) |
ebdf53a7 GM |
420 | # define default_symbol_version(real, name, version) \ |
421 | _default_symbol_version(real, name, version) | |
422 | # ifdef __ASSEMBLER__ | |
c843e065 RM |
423 | # ifdef HAVE_ASM_GLOBAL_DOT_NAME |
424 | # define _symbol_version(real, name, version) \ | |
425 | .symver real, name##@##version ASM_LINE_SEP \ | |
5ef6ae4b | 426 | .symver C_SYMBOL_DOT_NAME(real), C_SYMBOL_DOT_NAME(name##@##version) |
c843e065 RM |
427 | # define _default_symbol_version(real, name, version) \ |
428 | .symver real, name##@##@##version ASM_LINE_SEP \ | |
5ef6ae4b | 429 | .symver C_SYMBOL_DOT_NAME(real), C_SYMBOL_DOT_NAME(name##@##@##version) |
c843e065 RM |
430 | # else |
431 | # define _symbol_version(real, name, version) \ | |
da2d1bc5 | 432 | .symver real, name##@##version |
c843e065 | 433 | # define _default_symbol_version(real, name, version) \ |
da2d1bc5 | 434 | .symver real, name##@##@##version |
c843e065 | 435 | # endif |
da2d1bc5 | 436 | # else |
c843e065 RM |
437 | # ifdef HAVE_ASM_GLOBAL_DOT_NAME |
438 | # define _symbol_version(real, name, version) \ | |
439 | __asm__ (".symver " #real "," #name "@" #version "\n\t" \ | |
440 | ".symver ." #real ",." #name "@" #version) | |
441 | # define _default_symbol_version(real, name, version) \ | |
442 | __asm__ (".symver " #real "," #name "@@" #version "\n\t" \ | |
443 | ".symver ." #real ",." #name "@@" #version) | |
444 | # else | |
445 | # define _symbol_version(real, name, version) \ | |
1ea89a40 | 446 | __asm__ (".symver " #real "," #name "@" #version) |
c843e065 | 447 | # define _default_symbol_version(real, name, version) \ |
f2ea0f5b | 448 | __asm__ (".symver " #real "," #name "@@" #version) |
c843e065 | 449 | # endif |
da2d1bc5 | 450 | # endif |
1ea89a40 UD |
451 | #else |
452 | # define symbol_version(real, name, version) | |
da2d1bc5 UD |
453 | # define default_symbol_version(real, name, version) \ |
454 | strong_alias(real, name) | |
1ea89a40 UD |
455 | #endif |
456 | ||
11bf311e | 457 | #if defined SHARED || defined LIBC_NONSHARED |
e6caf4e1 UD |
458 | # define attribute_hidden __attribute__ ((visibility ("hidden"))) |
459 | #else | |
460 | # define attribute_hidden | |
461 | #endif | |
462 | ||
392a6b52 | 463 | #ifdef HAVE_TLS_MODEL_ATTRIBUTE |
9b21e6bc RM |
464 | # define attribute_tls_model_ie __attribute__ ((tls_model ("initial-exec"))) |
465 | #else | |
466 | # define attribute_tls_model_ie | |
467 | #endif | |
468 | ||
11bf311e | 469 | #define attribute_relro __attribute__ ((section (".data.rel.ro"))) |
392a6b52 | 470 | |
7969407a UD |
471 | /* Handling on non-exported internal names. We have to do this only |
472 | for shared code. */ | |
473 | #ifdef SHARED | |
cff26a3e | 474 | # define INTUSE(name) name##_internal |
e6caf4e1 UD |
475 | # define INTDEF(name) strong_alias (name, name##_internal) |
476 | # define INTVARDEF(name) \ | |
1897bc3f | 477 | _INTVARDEF (name, name##_internal) |
11bf311e | 478 | # define _INTVARDEF(name, aliasname) \ |
100351c3 UD |
479 | extern __typeof (name) aliasname __attribute__ ((alias (#name), \ |
480 | visibility ("hidden"))); | |
e6caf4e1 | 481 | # define INTDEF2(name, newname) strong_alias (name, newname##_internal) |
1897bc3f | 482 | # define INTVARDEF2(name, newname) _INTVARDEF (name, newname##_internal) |
7969407a | 483 | #else |
cff26a3e | 484 | # define INTUSE(name) name |
7969407a | 485 | # define INTDEF(name) |
e6caf4e1 | 486 | # define INTVARDEF(name) |
77fe0b9c | 487 | # define INTDEF2(name, newname) |
1897bc3f | 488 | # define INTVARDEF2(name, newname) |
7969407a UD |
489 | #endif |
490 | ||
37ba7d66 UD |
491 | /* The following macros are used for PLT bypassing within libc.so |
492 | (and if needed other libraries similarly). | |
493 | First of all, you need to have the function prototyped somewhere, | |
494 | say in foo/foo.h: | |
495 | ||
496 | int foo (int __bar); | |
497 | ||
498 | If calls to foo within libc.so should always go to foo defined in libc.so, | |
499 | then in include/foo.h you add: | |
500 | ||
501 | libc_hidden_proto (foo) | |
502 | ||
503 | line and after the foo function definition: | |
504 | ||
505 | int foo (int __bar) | |
506 | { | |
507 | return __bar; | |
508 | } | |
509 | libc_hidden_def (foo) | |
510 | ||
511 | or | |
512 | ||
513 | int foo (int __bar) | |
514 | { | |
515 | return __bar; | |
516 | } | |
517 | libc_hidden_weak (foo) | |
518 | ||
5536dfcb | 519 | Similarly for global data. If references to foo within libc.so should |
c843e065 RM |
520 | always go to foo defined in libc.so, then in include/foo.h you add: |
521 | ||
522 | libc_hidden_proto (foo) | |
523 | ||
524 | line and after foo's definition: | |
525 | ||
526 | int foo = INITIAL_FOO_VALUE; | |
527 | libc_hidden_data_def (foo) | |
528 | ||
529 | or | |
530 | ||
531 | int foo = INITIAL_FOO_VALUE; | |
532 | libc_hidden_data_weak (foo) | |
533 | ||
5536dfcb | 534 | If foo is normally just an alias (strong or weak) to some other function, |
37ba7d66 UD |
535 | you should use the normal strong_alias first, then add libc_hidden_def |
536 | or libc_hidden_weak: | |
537 | ||
538 | int baz (int __bar) | |
539 | { | |
540 | return __bar; | |
541 | } | |
542 | strong_alias (baz, foo) | |
543 | libc_hidden_weak (foo) | |
544 | ||
545 | If the function should be internal to multiple objects, say ld.so and | |
546 | libc.so, the best way is to use: | |
547 | ||
548 | #if !defined NOT_IN_libc || defined IS_IN_rtld | |
549 | hidden_proto (foo) | |
550 | #endif | |
551 | ||
552 | in include/foo.h and the normal macros at all function definitions | |
553 | depending on what DSO they belong to. | |
554 | ||
555 | If versioned_symbol macro is used to define foo, | |
556 | libc_hidden_ver macro should be used, as in: | |
557 | ||
558 | int __real_foo (int __bar) | |
559 | { | |
560 | return __bar; | |
561 | } | |
562 | versioned_symbol (libc, __real_foo, foo, GLIBC_2_1); | |
563 | libc_hidden_ver (__real_foo, foo) */ | |
564 | ||
11bf311e | 565 | #if defined SHARED && defined DO_VERSIONING && !defined NO_HIDDEN |
37ba7d66 | 566 | # ifndef __ASSEMBLER__ |
11bf311e | 567 | # define __hidden_proto_hiddenattr(attrs...) \ |
81cb0d82 | 568 | __attribute__ ((visibility ("hidden"), ##attrs)) |
81cb0d82 UD |
569 | # define hidden_proto(name, attrs...) \ |
570 | __hidden_proto (name, __GI_##name, ##attrs) | |
571 | # define __hidden_proto(name, internal, attrs...) \ | |
a585ba22 | 572 | extern __typeof (name) name __asm__ (__hidden_asmname (#internal)) \ |
81cb0d82 | 573 | __hidden_proto_hiddenattr (attrs); |
37ba7d66 UD |
574 | # define __hidden_asmname(name) \ |
575 | __hidden_asmname1 (__USER_LABEL_PREFIX__, name) | |
576 | # define __hidden_asmname1(prefix, name) __hidden_asmname2(prefix, name) | |
577 | # define __hidden_asmname2(prefix, name) #prefix name | |
61995d3e RM |
578 | # define __hidden_ver1(local, internal, name) \ |
579 | extern __typeof (name) __EI_##name __asm__(__hidden_asmname (#internal)); \ | |
580 | extern __typeof (name) __EI_##name \ | |
581 | __attribute__((alias (__hidden_asmname (#local)))) | |
582 | # define hidden_ver(local, name) __hidden_ver1(local, __GI_##name, name); | |
583 | # define hidden_data_ver(local, name) hidden_ver(local, name) | |
584 | # define hidden_def(name) __hidden_ver1(__GI_##name, name, name); | |
585 | # define hidden_data_def(name) hidden_def(name) | |
586 | # define hidden_weak(name) \ | |
587 | __hidden_ver1(__GI_##name, name, name) __attribute__((weak)); | |
588 | # define hidden_data_weak(name) hidden_weak(name) | |
37ba7d66 UD |
589 | # else |
590 | /* For assembly, we need to do the opposite of what we do in C: | |
591 | in assembly gcc __REDIRECT stuff is not in place, so functions | |
592 | are defined by its normal name and we need to create the | |
593 | __GI_* alias to it, in C __REDIRECT causes the function definition | |
594 | to use __GI_* name and we need to add alias to the real name. | |
4547dee3 RM |
595 | There is no reason to use hidden_weak over hidden_def in assembly, |
596 | but we provide it for consistency with the C usage. | |
597 | hidden_proto doesn't make sense for assembly but the equivalent | |
dce8f2b6 | 598 | is to call via the HIDDEN_JUMPTARGET macro instead of JUMPTARGET. */ |
4547dee3 RM |
599 | # define hidden_def(name) strong_alias (name, __GI_##name) |
600 | # define hidden_weak(name) hidden_def (name) | |
37ba7d66 | 601 | # define hidden_ver(local, name) strong_alias (local, __GI_##name) |
c843e065 RM |
602 | # define hidden_data_def(name) strong_data_alias (name, __GI_##name) |
603 | # define hidden_data_weak(name) hidden_data_def (name) | |
604 | # define hidden_data_ver(local, name) strong_data_alias (local, __GI_##name) | |
605 | # ifdef HAVE_ASM_GLOBAL_DOT_NAME | |
606 | # define HIDDEN_JUMPTARGET(name) .__GI_##name | |
607 | # else | |
608 | # define HIDDEN_JUMPTARGET(name) __GI_##name | |
609 | # endif | |
37ba7d66 UD |
610 | # endif |
611 | #else | |
4547dee3 | 612 | # ifndef __ASSEMBLER__ |
81cb0d82 | 613 | # define hidden_proto(name, attrs...) |
4547dee3 RM |
614 | # else |
615 | # define HIDDEN_JUMPTARGET(name) JUMPTARGET(name) | |
616 | # endif /* Not __ASSEMBLER__ */ | |
617 | # define hidden_weak(name) | |
37ba7d66 UD |
618 | # define hidden_def(name) |
619 | # define hidden_ver(local, name) | |
c843e065 RM |
620 | # define hidden_data_weak(name) |
621 | # define hidden_data_def(name) | |
622 | # define hidden_data_ver(local, name) | |
37ba7d66 UD |
623 | #endif |
624 | ||
c5598d47 | 625 | #if !defined NOT_IN_libc |
81cb0d82 | 626 | # define libc_hidden_proto(name, attrs...) hidden_proto (name, ##attrs) |
37ba7d66 UD |
627 | # define libc_hidden_def(name) hidden_def (name) |
628 | # define libc_hidden_weak(name) hidden_weak (name) | |
629 | # define libc_hidden_ver(local, name) hidden_ver (local, name) | |
c843e065 RM |
630 | # define libc_hidden_data_def(name) hidden_data_def (name) |
631 | # define libc_hidden_data_weak(name) hidden_data_weak (name) | |
632 | # define libc_hidden_data_ver(local, name) hidden_data_ver (local, name) | |
37ba7d66 | 633 | #else |
81cb0d82 | 634 | # define libc_hidden_proto(name, attrs...) |
37ba7d66 UD |
635 | # define libc_hidden_def(name) |
636 | # define libc_hidden_weak(name) | |
637 | # define libc_hidden_ver(local, name) | |
c843e065 RM |
638 | # define libc_hidden_data_def(name) |
639 | # define libc_hidden_data_weak(name) | |
640 | # define libc_hidden_data_ver(local, name) | |
37ba7d66 UD |
641 | #endif |
642 | ||
c5598d47 | 643 | #if defined NOT_IN_libc && defined IS_IN_rtld |
81cb0d82 | 644 | # define rtld_hidden_proto(name, attrs...) hidden_proto (name, ##attrs) |
37ba7d66 UD |
645 | # define rtld_hidden_def(name) hidden_def (name) |
646 | # define rtld_hidden_weak(name) hidden_weak (name) | |
647 | # define rtld_hidden_ver(local, name) hidden_ver (local, name) | |
c843e065 RM |
648 | # define rtld_hidden_data_def(name) hidden_data_def (name) |
649 | # define rtld_hidden_data_weak(name) hidden_data_weak (name) | |
650 | # define rtld_hidden_data_ver(local, name) hidden_data_ver (local, name) | |
37ba7d66 | 651 | #else |
81cb0d82 | 652 | # define rtld_hidden_proto(name, attrs...) |
37ba7d66 UD |
653 | # define rtld_hidden_def(name) |
654 | # define rtld_hidden_weak(name) | |
655 | # define rtld_hidden_ver(local, name) | |
c843e065 RM |
656 | # define rtld_hidden_data_def(name) |
657 | # define rtld_hidden_data_weak(name) | |
658 | # define rtld_hidden_data_ver(local, name) | |
37ba7d66 UD |
659 | #endif |
660 | ||
c5598d47 | 661 | #if defined NOT_IN_libc && defined IS_IN_libm |
81cb0d82 | 662 | # define libm_hidden_proto(name, attrs...) hidden_proto (name, ##attrs) |
37ba7d66 UD |
663 | # define libm_hidden_def(name) hidden_def (name) |
664 | # define libm_hidden_weak(name) hidden_weak (name) | |
665 | # define libm_hidden_ver(local, name) hidden_ver (local, name) | |
c843e065 RM |
666 | # define libm_hidden_data_def(name) hidden_data_def (name) |
667 | # define libm_hidden_data_weak(name) hidden_data_weak (name) | |
668 | # define libm_hidden_data_ver(local, name) hidden_data_ver (local, name) | |
37ba7d66 | 669 | #else |
81cb0d82 | 670 | # define libm_hidden_proto(name, attrs...) |
37ba7d66 UD |
671 | # define libm_hidden_def(name) |
672 | # define libm_hidden_weak(name) | |
673 | # define libm_hidden_ver(local, name) | |
c843e065 RM |
674 | # define libm_hidden_data_def(name) |
675 | # define libm_hidden_data_weak(name) | |
676 | # define libm_hidden_data_ver(local, name) | |
37ba7d66 UD |
677 | #endif |
678 | ||
6f9d8e68 UD |
679 | #if defined NOT_IN_libc && defined IS_IN_libresolv |
680 | # define libresolv_hidden_proto(name, attrs...) hidden_proto (name, ##attrs) | |
681 | # define libresolv_hidden_def(name) hidden_def (name) | |
682 | # define libresolv_hidden_weak(name) hidden_weak (name) | |
683 | # define libresolv_hidden_ver(local, name) hidden_ver (local, name) | |
684 | # define libresolv_hidden_data_def(name) hidden_data_def (name) | |
685 | # define libresolv_hidden_data_weak(name) hidden_data_weak (name) | |
686 | # define libresolv_hidden_data_ver(local, name) hidden_data_ver (local, name) | |
687 | #else | |
688 | # define libresolv_hidden_proto(name, attrs...) | |
689 | # define libresolv_hidden_def(name) | |
690 | # define libresolv_hidden_weak(name) | |
691 | # define libresolv_hidden_ver(local, name) | |
692 | # define libresolv_hidden_data_def(name) | |
693 | # define libresolv_hidden_data_weak(name) | |
694 | # define libresolv_hidden_data_ver(local, name) | |
695 | #endif | |
696 | ||
a9564ae9 UD |
697 | #if defined NOT_IN_libc && defined IS_IN_librt |
698 | # define librt_hidden_proto(name, attrs...) hidden_proto (name, ##attrs) | |
699 | # define librt_hidden_def(name) hidden_def (name) | |
700 | # define librt_hidden_weak(name) hidden_weak (name) | |
701 | # define librt_hidden_ver(local, name) hidden_ver (local, name) | |
702 | # define librt_hidden_data_def(name) hidden_data_def (name) | |
703 | # define librt_hidden_data_weak(name) hidden_data_weak (name) | |
704 | # define librt_hidden_data_ver(local, name) hidden_data_ver (local, name) | |
705 | #else | |
706 | # define librt_hidden_proto(name, attrs...) | |
707 | # define librt_hidden_def(name) | |
708 | # define librt_hidden_weak(name) | |
709 | # define librt_hidden_ver(local, name) | |
710 | # define librt_hidden_data_def(name) | |
711 | # define librt_hidden_data_weak(name) | |
712 | # define librt_hidden_data_ver(local, name) | |
713 | #endif | |
714 | ||
5f21997b UD |
715 | #if defined NOT_IN_libc && defined IS_IN_libdl |
716 | # define libdl_hidden_proto(name, attrs...) hidden_proto (name, ##attrs) | |
717 | # define libdl_hidden_def(name) hidden_def (name) | |
718 | # define libdl_hidden_weak(name) hidden_weak (name) | |
719 | # define libdl_hidden_ver(local, name) hidden_ver (local, name) | |
720 | # define libdl_hidden_data_def(name) hidden_data_def (name) | |
721 | # define libdl_hidden_data_weak(name) hidden_data_weak (name) | |
722 | # define libdl_hidden_data_ver(local, name) hidden_data_ver (local, name) | |
723 | #else | |
724 | # define libdl_hidden_proto(name, attrs...) | |
725 | # define libdl_hidden_def(name) | |
726 | # define libdl_hidden_weak(name) | |
727 | # define libdl_hidden_ver(local, name) | |
728 | # define libdl_hidden_data_def(name) | |
729 | # define libdl_hidden_data_weak(name) | |
730 | # define libdl_hidden_data_ver(local, name) | |
731 | #endif | |
732 | ||
44843eee UD |
733 | #if defined NOT_IN_libc && defined IS_IN_libnss_files |
734 | # define libnss_files_hidden_proto(name, attrs...) hidden_proto (name, ##attrs) | |
735 | # define libnss_files_hidden_def(name) hidden_def (name) | |
736 | # define libnss_files_hidden_weak(name) hidden_weak (name) | |
737 | # define libnss_files_hidden_ver(local, name) hidden_ver (local, name) | |
738 | # define libnss_files_hidden_data_def(name) hidden_data_def (name) | |
739 | # define libnss_files_hidden_data_weak(name) hidden_data_weak (name) | |
740 | # define libnss_files_hidden_data_ver(local, name) hidden_data_ver(local, name) | |
741 | #else | |
742 | # define libnss_files_hidden_proto(name, attrs...) | |
743 | # define libnss_files_hidden_def(name) | |
744 | # define libnss_files_hidden_weak(name) | |
745 | # define libnss_files_hidden_ver(local, name) | |
746 | # define libnss_files_hidden_data_def(name) | |
747 | # define libnss_files_hidden_data_weak(name) | |
748 | # define libnss_files_hidden_data_ver(local, name) | |
749 | #endif | |
750 | ||
1d5cee23 UD |
751 | #if defined NOT_IN_libc && defined IS_IN_libnsl |
752 | # define libnsl_hidden_proto(name, attrs...) hidden_proto (name, ##attrs) | |
753 | # define libnsl_hidden_def(name) hidden_def (name) | |
754 | # define libnsl_hidden_weak(name) hidden_weak (name) | |
755 | # define libnsl_hidden_ver(local, name) hidden_ver (local, name) | |
756 | # define libnsl_hidden_data_def(name) hidden_data_def (name) | |
757 | # define libnsl_hidden_data_weak(name) hidden_data_weak (name) | |
758 | # define libnsl_hidden_data_ver(local, name) hidden_data_ver (local, name) | |
759 | #else | |
760 | # define libnsl_hidden_proto(name, attrs...) | |
761 | # define libnsl_hidden_def(name) | |
762 | # define libnsl_hidden_weak(name) | |
763 | # define libnsl_hidden_ver(local, name) | |
764 | # define libnsl_hidden_data_def(name) | |
765 | # define libnsl_hidden_data_weak(name) | |
766 | # define libnsl_hidden_data_ver(local, name) | |
767 | #endif | |
768 | ||
b31b32b3 UD |
769 | #if defined NOT_IN_libc && defined IS_IN_libnss_nisplus |
770 | # define libnss_nisplus_hidden_proto(name, attrs...) hidden_proto (name, ##attrs) | |
771 | # define libnss_nisplus_hidden_def(name) hidden_def (name) | |
772 | # define libnss_nisplus_hidden_weak(name) hidden_weak (name) | |
773 | # define libnss_nisplus_hidden_ver(local, name) hidden_ver (local, name) | |
774 | # define libnss_nisplus_hidden_data_def(name) hidden_data_def (name) | |
775 | # define libnss_nisplus_hidden_data_weak(name) hidden_data_weak (name) | |
776 | # define libnss_nisplus_hidden_data_ver(local, name) hidden_data_ver (local, name) | |
777 | #else | |
778 | # define libnss_nisplus_hidden_proto(name, attrs...) | |
779 | # define libnss_nisplus_hidden_def(name) | |
780 | # define libnss_nisplus_hidden_weak(name) | |
781 | # define libnss_nisplus_hidden_ver(local, name) | |
782 | # define libnss_nisplus_hidden_data_def(name) | |
783 | # define libnss_nisplus_hidden_data_weak(name) | |
784 | # define libnss_nisplus_hidden_data_ver(local, name) | |
785 | #endif | |
786 | ||
85dd1003 UD |
787 | #ifdef HAVE_BUILTIN_REDIRECTION |
788 | # define libc_hidden_builtin_proto(name, attrs...) libc_hidden_proto (name, ##attrs) | |
789 | # define libc_hidden_builtin_def(name) libc_hidden_def (name) | |
790 | # define libc_hidden_builtin_weak(name) libc_hidden_weak (name) | |
791 | # define libc_hidden_builtin_ver(local, name) libc_hidden_ver (local, name) | |
27b02589 UD |
792 | # ifdef __ASSEMBLER__ |
793 | # define HIDDEN_BUILTIN_JUMPTARGET(name) HIDDEN_JUMPTARGET(name) | |
794 | # endif | |
85dd1003 UD |
795 | #else |
796 | # define libc_hidden_builtin_proto(name, attrs...) | |
797 | # define libc_hidden_builtin_def(name) | |
798 | # define libc_hidden_builtin_weak(name) | |
799 | # define libc_hidden_builtin_ver(local, name) | |
27b02589 UD |
800 | # ifdef __ASSEMBLER__ |
801 | # define HIDDEN_BUILTIN_JUMPTARGET(name) JUMPTARGET(name) | |
802 | # endif | |
85dd1003 UD |
803 | #endif |
804 | ||
b31b32b3 UD |
805 | #if defined NOT_IN_libc && defined IS_IN_libutil |
806 | # define libutil_hidden_proto(name, attrs...) hidden_proto (name, ##attrs) | |
807 | # define libutil_hidden_def(name) hidden_def (name) | |
808 | # define libutil_hidden_weak(name) hidden_weak (name) | |
809 | # define libutil_hidden_ver(local, name) hidden_ver (local, name) | |
810 | # define libutil_hidden_data_def(name) hidden_data_def (name) | |
811 | # define libutil_hidden_data_weak(name) hidden_data_weak (name) | |
812 | # define libutil_hidden_data_ver(local, name) hidden_data_ver (local, name) | |
813 | #else | |
814 | # define libutil_hidden_proto(name, attrs...) | |
815 | # define libutil_hidden_def(name) | |
816 | # define libutil_hidden_weak(name) | |
817 | # define libutil_hidden_ver(local, name) | |
818 | # define libutil_hidden_data_def(name) | |
819 | # define libutil_hidden_data_weak(name) | |
820 | # define libutil_hidden_data_ver(local, name) | |
821 | #endif | |
822 | ||
b30542fb UD |
823 | /* Get some dirty hacks. */ |
824 | #include <symbol-hacks.h> | |
825 | ||
4a381a81 UD |
826 | /* Move compatibility symbols out of the way by placing them all in a |
827 | special section. */ | |
d3a4a571 UD |
828 | #ifndef __ASSEMBLER__ |
829 | # define attribute_compat_text_section \ | |
4a381a81 | 830 | __attribute__ ((section (".text.compat"))) |
d3a4a571 | 831 | # define attribute_compat_data_section \ |
4a381a81 | 832 | __attribute__ ((section (".data.compat"))) |
d3a4a571 UD |
833 | #else |
834 | # define compat_text_section .section ".text.compat", "ax"; | |
835 | # define compat_data_section .section ".data.compat", "aw"; | |
836 | #endif | |
4a381a81 | 837 | |
28f540f4 | 838 | #endif /* libc-symbols.h */ |