summary refs log tree commit diff
path: root/include/libc-symbols.h
blob: da46f5e8040e15395b97d7284203f78707410a8d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
/* Support macros for making weak and strong aliases for symbols,
   and for using symbol sets and linker warnings with GNU ld.
   Copyright (C) 1995-1998,2000-2003,2004,2005,2006
	Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifndef _LIBC_SYMBOLS_H
#define _LIBC_SYMBOLS_H	1

/* This file's macros are included implicitly in the compilation of every
   file in the C library by -imacros.

   We include config.h which is generated by configure.
   It should define for us the following symbols:

   * HAVE_ASM_SET_DIRECTIVE if we have `.set B, A' instead of `A = B'.
   * ASM_GLOBAL_DIRECTIVE with `.globl' or `.global'.
   * ASM_TYPE_DIRECTIVE_PREFIX with `@' or `#' or whatever for .type,
     or leave it undefined if there is no .type directive.
   * HAVE_ELF if using ELF, which supports weak symbols using `.weak'.
   * HAVE_ASM_WEAK_DIRECTIVE if we have weak symbols using `.weak'.
   * HAVE_ASM_WEAKEXT_DIRECTIVE if we have weak symbols using `.weakext'.

   */

/* This is defined for the compilation of all C library code.  features.h
   tests this to avoid inclusion of stubs.h while compiling the library,
   before stubs.h has been generated.  Some library code that is shared
   with other packages also tests this symbol to see if it is being
   compiled as part of the C library.  We must define this before including
   config.h, because it makes some definitions conditional on whether libc
   itself is being compiled, or just some generator program.  */
#define _LIBC	1

/* Enable declarations of GNU extensions, since we are compiling them.  */
#define _GNU_SOURCE	1
/* And we also need the data for the reentrant functions.  */
#define _REENTRANT	1

#include <config.h>

/* The symbols in all the user (non-_) macros are C symbols.
   NO HAVE_ELF implies a.out.  */

#if defined HAVE_ASM_WEAK_DIRECTIVE || defined HAVE_ASM_WEAKEXT_DIRECTIVE
# define HAVE_WEAK_SYMBOLS
#endif

#ifndef __SYMBOL_PREFIX
# ifdef NO_UNDERSCORES
#  define __SYMBOL_PREFIX
# else
#  define __SYMBOL_PREFIX "_"
# endif
#endif

#ifndef C_SYMBOL_NAME
# ifdef NO_UNDERSCORES
#  define C_SYMBOL_NAME(name) name
# else
#  define C_SYMBOL_NAME(name) _##name
# endif
#endif

#ifndef ASM_LINE_SEP
# define ASM_LINE_SEP ;
#endif

#ifdef HAVE_ASM_GLOBAL_DOT_NAME
# ifndef C_SYMBOL_DOT_NAME
#  if defined __GNUC__ && defined __GNUC_MINOR__ \
      && (__GNUC__ << 16) + __GNUC_MINOR__ >= (3 << 16) + 1
#   define C_SYMBOL_DOT_NAME(name) .name
#  else
#   define C_SYMBOL_DOT_NAME(name) .##name
#  endif
# endif
#endif

#ifndef __ASSEMBLER__
/* GCC understands weak symbols and aliases; use its interface where
   possible, instead of embedded assembly language.  */

/* Define ALIASNAME as a strong alias for NAME.  */
# define strong_alias(name, aliasname) _strong_alias(name, aliasname)
# define _strong_alias(name, aliasname) \
  extern __typeof (name) aliasname __attribute__ ((alias (#name)));

/* This comes between the return type and function name in
   a function definition to make that definition weak.  */
# define weak_function __attribute__ ((weak))
# define weak_const_function __attribute__ ((weak, __const__))

# ifdef HAVE_WEAK_SYMBOLS

/* Define ALIASNAME as a weak alias for NAME.
   If weak aliases are not available, this defines a strong alias.  */
#  define weak_alias(name, aliasname) _weak_alias (name, aliasname)
#  define _weak_alias(name, aliasname) \
  extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)));

/* Declare SYMBOL as weak undefined symbol (resolved to 0 if not defined).  */
#  define weak_extern(symbol) _weak_extern (weak symbol)
#  define _weak_extern(expr) _Pragma (#expr)

# else

#  define weak_alias(name, aliasname) strong_alias(name, aliasname)
#  define weak_extern(symbol) /* Nothing. */

# endif

#else /* __ASSEMBLER__ */

# ifdef HAVE_ASM_SET_DIRECTIVE
#  ifdef HAVE_ASM_GLOBAL_DOT_NAME
#   define strong_alias(original, alias)				\
  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP		\
  .set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original) ASM_LINE_SEP	\
  ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP		\
  .set C_SYMBOL_DOT_NAME (alias),C_SYMBOL_DOT_NAME (original)
#   define strong_data_alias(original, alias)				\
  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP		\
  .set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original)
#  else
#   define strong_alias(original, alias)				\
  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP		\
  .set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original)
#   define strong_data_alias(original, alias) strong_alias(original, alias)
#  endif
# else
#  ifdef HAVE_ASM_GLOBAL_DOT_NAME
#   define strong_alias(original, alias)				\
  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP		\
  C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP		\
  ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP		\
  C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original)
#   define strong_data_alias(original, alias)				\
  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP		\
  C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original)
#  else
#   define strong_alias(original, alias)				\
  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP		\
  C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original)
#   define strong_data_alias(original, alias) strong_alias(original, alias)
#  endif
# endif

# ifdef HAVE_WEAK_SYMBOLS
#  ifdef HAVE_ASM_WEAKEXT_DIRECTIVE
#   ifdef HAVE_ASM_GLOBAL_DOT_NAME
#    define weak_alias(original, alias)					\
  .weakext C_SYMBOL_NAME (alias), C_SYMBOL_NAME (original) ASM_LINE_SEP \
  .weakext C_SYMBOL_DOT_NAME (alias), C_SYMBOL_DOT_NAME (original)
#   else
#    define weak_alias(original, alias)					\
  .weakext C_SYMBOL_NAME (alias), C_SYMBOL_NAME (original)
#   endif
#   define weak_extern(symbol)						\
  .weakext C_SYMBOL_NAME (symbol)

#  else /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */

#   ifdef HAVE_ASM_GLOBAL_DOT_NAME
#    define weak_alias(original, alias)					\
  .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP				\
  C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP		\
  .weak C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP				\
  C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original)
#   else
#    define weak_alias(original, alias)					\
  .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP				\
  C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original)
#   endif

#   define weak_extern(symbol)						\
  .weak C_SYMBOL_NAME (symbol)

#  endif /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */

# else /* ! HAVE_WEAK_SYMBOLS */

#  define weak_alias(original, alias) strong_alias(original, alias)
#  define weak_extern(symbol) /* Nothing */
# endif /* ! HAVE_WEAK_SYMBOLS */

#endif /* __ASSEMBLER__ */

/* On some platforms we can make internal function calls (i.e., calls of
   functions not exported) a bit faster by using a different calling
   convention.  */
#ifndef internal_function
# define internal_function	/* empty */
#endif

/* Prepare for the case that `__builtin_expect' is not available.  */
#ifndef HAVE_BUILTIN_EXPECT
# define __builtin_expect(expr, val) (expr)
#endif

/* Determine the return address.  */
#define RETURN_ADDRESS(nr) \
  __builtin_extract_return_addr (__builtin_return_address (nr))

/* When a reference to SYMBOL is encountered, the linker will emit a
   warning message MSG.  */
#ifdef HAVE_ELF

/* We want the .gnu.warning.SYMBOL section to be unallocated.  */
# ifdef HAVE_ASM_PREVIOUS_DIRECTIVE
#  define __make_section_unallocated(section_string)	\
  asm (".section " section_string "\n\t.previous");
# elif defined HAVE_ASM_POPSECTION_DIRECTIVE
#  define __make_section_unallocated(section_string)	\
  asm (".pushsection " section_string "\n\t.popsection");
# else
#  define __make_section_unallocated(section_string)
# endif

/* Tacking on "\n\t#" to the section name makes gcc put it's bogus
   section attributes on what looks like a comment to the assembler.  */
# ifdef HAVE_SECTION_QUOTES
#  define __sec_comment "\"\n\t#\""
# else
#  define __sec_comment "\n\t#"
# endif
# define link_warning(symbol, msg) \
  __make_section_unallocated (".gnu.warning." #symbol) \
  static const char __evoke_link_warning_##symbol[]	\
    __attribute__ ((used, section (".gnu.warning." #symbol __sec_comment))) \
    = msg;
# define libc_freeres_ptr(decl) \
  __make_section_unallocated ("__libc_freeres_ptrs, \"aw\", %nobits") \
  decl __attribute__ ((section ("__libc_freeres_ptrs" __sec_comment)))
# define __libc_freeres_fn_section \
  __attribute__ ((section ("__libc_freeres_fn")))
#else /* Not ELF: a.out */
# ifdef HAVE_XCOFF
/* XCOFF does not support .stabs.
   The native aix linker will remove the .stab and .stabstr sections
   The gnu linker will have a fatal error if there is a relocation for
   symbol in the .stab section.  Silently disable this macro.  */
#  define link_warning(symbol, msg)
# else
#  define link_warning(symbol, msg)		\
     asm (".stabs \"" msg "\",30,0,0,0\n\t"	\
          ".stabs \"" __SYMBOL_PREFIX #symbol "\",1,0,0,0\n");
# endif /* XCOFF */
# define libc_freeres_ptr(decl) decl
# define __libc_freeres_fn_section
#endif
#define libc_freeres_fn(name)	\
  static void name (void) __attribute_used__ __libc_freeres_fn_section;	\
  text_set_element (__libc_subfreeres, name);				\
  static void name (void)

/* A canned warning for sysdeps/stub functions.  */
#define	stub_warning(name) \
  __make_section_unallocated (".gnu.glibc-stub." #name) \
  link_warning (name, \
		"warning: " #name " is not implemented and will always fail")

/* Warning for linking functions calling dlopen into static binaries.  */
#ifdef SHARED
#define static_link_warning(name)
#else
#define static_link_warning(name) static_link_warning1(name)
#define static_link_warning1(name) \
  link_warning(name, "Using '" #name "' in statically linked applications \
requires at runtime the shared libraries from the glibc version used \
for linking")
#endif

/* Declare SYMBOL to be TYPE (`function' or `object') and of SIZE bytes,
   when the assembler supports such declarations (such as in ELF).
   This is only necessary when defining something in assembly, or playing
   funny alias games where the size should be other than what the compiler
   thinks it is.  */
#define declare_symbol(symbol, type, size) \
  declare_symbol_1 (symbol, type, size)
#ifdef ASM_TYPE_DIRECTIVE_PREFIX
# ifdef __ASSEMBLER__
#  define declare_symbol_1(symbol, type, size) \
    .type C_SYMBOL_NAME (symbol), \
	  declare_symbol_1_paste (ASM_TYPE_DIRECTIVE_PREFIX, type), size
#  define declare_symbol_1_paste(a, b)	declare_symbol_1_paste_1 (a,b)
#  define declare_symbol_1_paste_1(a,b)	a##b
# else /* Not __ASSEMBLER__.  */
#  define declare_symbol_1(symbol, type, size) \
    asm (".type " __SYMBOL_PREFIX #symbol ", " \
	 declare_symbol_1_stringify (ASM_TYPE_DIRECTIVE_PREFIX) #type \
	 "\n\t.size " __SYMBOL_PREFIX #symbol ", " #size);
#  define declare_symbol_1_stringify(x) declare_symbol_1_stringify_1 (x)
#  define declare_symbol_1_stringify_1(x) #x
# endif /* __ASSEMBLER__ */
#else
# define declare_symbol_1(symbol, type, size) /* Nothing.  */
#endif


/*

*/

/* Symbol set support macros.  */

#ifdef HAVE_ELF

/* Make SYMBOL, which is in the text segment, an element of SET.  */
# define text_set_element(set, symbol)	_elf_set_element(set, symbol)
/* Make SYMBOL, which is in the data segment, an element of SET.  */
# define data_set_element(set, symbol)	_elf_set_element(set, symbol)
/* Make SYMBOL, which is in the bss segment, an element of SET.  */
# define bss_set_element(set, symbol)	_elf_set_element(set, symbol)

/* These are all done the same way in ELF.
   There is a new section created for each set.  */
# ifdef SHARED
/* When building a shared library, make the set section writable,
   because it will need to be relocated at run time anyway.  */
#  define _elf_set_element(set, symbol) \
  static const void *__elf_set_##set##_element_##symbol##__ \
    __attribute__ ((used, section (#set))) = &(symbol)
# else
#  define _elf_set_element(set, symbol) \
  static const void *const __elf_set_##set##_element_##symbol##__ \
    __attribute__ ((used, section (#set))) = &(symbol)
# endif

/* Define SET as a symbol set.  This may be required (it is in a.out) to
   be able to use the set's contents.  */
# define symbol_set_define(set)	symbol_set_declare(set)

/* Declare SET for use in this module, if defined in another module.
   In a shared library, this is always local to that shared object.
   For static linking, the set might be wholly absent and so we use
   weak references.  */
# define symbol_set_declare(set) \
  extern char const __start_##set[] __symbol_set_attribute; \
  extern char const __stop_##set[] __symbol_set_attribute;
# ifdef SHARED
#  define __symbol_set_attribute attribute_hidden
# else
#  define __symbol_set_attribute __attribute__ ((weak))
# endif

/* Return a pointer (void *const *) to the first element of SET.  */
# define symbol_set_first_element(set)	((void *const *) (&__start_##set))

/* Return true iff PTR (a void *const *) has been incremented
   past the last element in SET.  */
# define symbol_set_end_p(set, ptr) ((ptr) >= (void *const *) &__stop_##set)

#else	/* Not ELF: a.out.  */

# ifdef HAVE_XCOFF
/* XCOFF does not support .stabs.
   The native aix linker will remove the .stab and .stabstr sections
   The gnu linker will have a fatal error if there is a relocation for
   symbol in the .stab section.  Silently disable these macros.  */
#  define text_set_element(set, symbol)
#  define data_set_element(set, symbol)
#  define bss_set_element(set, symbol)
# else
#  define text_set_element(set, symbol)	\
    asm (".stabs \"" __SYMBOL_PREFIX #set "\",23,0,0," __SYMBOL_PREFIX #symbol)
#  define data_set_element(set, symbol)	\
    asm (".stabs \"" __SYMBOL_PREFIX #set "\",25,0,0," __SYMBOL_PREFIX #symbol)
#  define bss_set_element(set, symbol)	?error Must use initialized data.
# endif /* XCOFF */
# define symbol_set_define(set)	void *const (set)[1];
# define symbol_set_declare(set)	extern void *const (set)[1];

# define symbol_set_first_element(set)	&(set)[1]
# define symbol_set_end_p(set, ptr)	(*(ptr) == 0)

#endif	/* ELF.  */

#if DO_VERSIONING
# define symbol_version(real, name, version) \
     _symbol_version(real, name, version)
# define default_symbol_version(real, name, version) \
     _default_symbol_version(real, name, version)
# ifdef __ASSEMBLER__
#  ifdef HAVE_ASM_GLOBAL_DOT_NAME
#   define _symbol_version(real, name, version) \
     .symver real, name##@##version ASM_LINE_SEP			\
     .symver C_SYMBOL_DOT_NAME(real), C_SYMBOL_DOT_NAME(name##@##version)
#   define _default_symbol_version(real, name, version) \
     .symver real, name##@##@##version ASM_LINE_SEP			\
     .symver C_SYMBOL_DOT_NAME(real), C_SYMBOL_DOT_NAME(name##@##@##version)
#  else
#   define _symbol_version(real, name, version) \
     .symver real, name##@##version
#   define _default_symbol_version(real, name, version) \
     .symver real, name##@##@##version
#  endif
# else
#  ifdef HAVE_ASM_GLOBAL_DOT_NAME
#   define _symbol_version(real, name, version) \
     __asm__ (".symver " #real "," #name "@" #version "\n\t"	\
	      ".symver ." #real ",." #name "@" #version)
#   define _default_symbol_version(real, name, version) \
     __asm__ (".symver " #real "," #name "@@" #version "\n\t"	\
	      ".symver ." #real ",." #name "@@" #version)
#  else
#   define _symbol_version(real, name, version) \
     __asm__ (".symver " #real "," #name "@" #version)
#   define _default_symbol_version(real, name, version) \
     __asm__ (".symver " #real "," #name "@@" #version)
#  endif
# endif
#else
# define symbol_version(real, name, version)
# define default_symbol_version(real, name, version) \
  strong_alias(real, name)
#endif

#if defined HAVE_VISIBILITY_ATTRIBUTE \
    && (defined SHARED || defined LIBC_NONSHARED)
# define attribute_hidden __attribute__ ((visibility ("hidden")))
#else
# define attribute_hidden
#endif

#ifdef HAVE_TLS_MODEL_ATTRIBUTE
# define attribute_tls_model_ie __attribute__ ((tls_model ("initial-exec")))
#else
# define attribute_tls_model_ie
#endif

#ifdef HAVE_Z_RELRO
# define attribute_relro __attribute__ ((section (".data.rel.ro")))
#else
# define attribute_relro
#endif

/* Handling on non-exported internal names.  We have to do this only
   for shared code.  */
#ifdef SHARED
# define INTUSE(name) name##_internal
# define INTDEF(name) strong_alias (name, name##_internal)
# define INTVARDEF(name) \
  _INTVARDEF (name, name##_internal)
# if defined HAVE_VISIBILITY_ATTRIBUTE
#  define _INTVARDEF(name, aliasname) \
  extern __typeof (name) aliasname __attribute__ ((alias (#name), \
						   visibility ("hidden")));
# else
#  define _INTVARDEF(name, aliasname) \
  extern __typeof (name) aliasname __attribute__ ((alias (#name)));
# endif
# define INTDEF2(name, newname) strong_alias (name, newname##_internal)
# define INTVARDEF2(name, newname) _INTVARDEF (name, newname##_internal)
#else
# define INTUSE(name) name
# define INTDEF(name)
# define INTVARDEF(name)
# define INTDEF2(name, newname)
# define INTVARDEF2(name, newname)
#endif

/* The following macros are used for PLT bypassing within libc.so
   (and if needed other libraries similarly).
   First of all, you need to have the function prototyped somewhere,
   say in foo/foo.h:

   int foo (int __bar);

   If calls to foo within libc.so should always go to foo defined in libc.so,
   then in include/foo.h you add:

   libc_hidden_proto (foo)

   line and after the foo function definition:

   int foo (int __bar)
   {
     return __bar;
   }
   libc_hidden_def (foo)

   or

   int foo (int __bar)
   {
     return __bar;
   }
   libc_hidden_weak (foo)

   Similarly for global data.  If references to foo within libc.so should
   always go to foo defined in libc.so, then in include/foo.h you add:

   libc_hidden_proto (foo)

   line and after foo's definition:

   int foo = INITIAL_FOO_VALUE;
   libc_hidden_data_def (foo)

   or

   int foo = INITIAL_FOO_VALUE;
   libc_hidden_data_weak (foo)

   If foo is normally just an alias (strong or weak) to some other function,
   you should use the normal strong_alias first, then add libc_hidden_def
   or libc_hidden_weak:

   int baz (int __bar)
   {
     return __bar;
   }
   strong_alias (baz, foo)
   libc_hidden_weak (foo)

   If the function should be internal to multiple objects, say ld.so and
   libc.so, the best way is to use:

   #if !defined NOT_IN_libc || defined IS_IN_rtld
   hidden_proto (foo)
   #endif

   in include/foo.h and the normal macros at all function definitions
   depending on what DSO they belong to.

   If versioned_symbol macro is used to define foo,
   libc_hidden_ver macro should be used, as in:

   int __real_foo (int __bar)
   {
     return __bar;
   }
   versioned_symbol (libc, __real_foo, foo, GLIBC_2_1);
   libc_hidden_ver (__real_foo, foo)  */

#if defined SHARED && defined DO_VERSIONING \
    && !defined HAVE_BROKEN_ALIAS_ATTRIBUTE && !defined NO_HIDDEN
# ifndef __ASSEMBLER__
#  if !defined HAVE_VISIBILITY_ATTRIBUTE \
      || defined HAVE_BROKEN_VISIBILITY_ATTRIBUTE
#   define __hidden_proto_hiddenattr(attrs...)
#  else
#   define __hidden_proto_hiddenattr(attrs...) \
  __attribute__ ((visibility ("hidden"), ##attrs))
#  endif
#  define hidden_proto(name, attrs...) \
  __hidden_proto (name, __GI_##name, ##attrs)
#  define __hidden_proto(name, internal, attrs...) \
  extern __typeof (name) name __asm__ (__hidden_asmname (#internal)) \
  __hidden_proto_hiddenattr (attrs);
#  define __hidden_asmname(name) \
  __hidden_asmname1 (__USER_LABEL_PREFIX__, name)
#  define __hidden_asmname1(prefix, name) __hidden_asmname2(prefix, name)
#  define __hidden_asmname2(prefix, name) #prefix name
#  define __hidden_ver1(local, internal, name) \
  extern __typeof (name) __EI_##name __asm__(__hidden_asmname (#internal)); \
  extern __typeof (name) __EI_##name \
	__attribute__((alias (__hidden_asmname (#local))))
#  define hidden_ver(local, name)	__hidden_ver1(local, __GI_##name, name);
#  define hidden_data_ver(local, name)	hidden_ver(local, name)
#  define hidden_def(name)		__hidden_ver1(__GI_##name, name, name);
#  define hidden_data_def(name)		hidden_def(name)
#  define hidden_weak(name) \
	__hidden_ver1(__GI_##name, name, name) __attribute__((weak));
#  define hidden_data_weak(name)	hidden_weak(name)
# else
/* For assembly, we need to do the opposite of what we do in C:
   in assembly gcc __REDIRECT stuff is not in place, so functions
   are defined by its normal name and we need to create the
   __GI_* alias to it, in C __REDIRECT causes the function definition
   to use __GI_* name and we need to add alias to the real name.
   There is no reason to use hidden_weak over hidden_def in assembly,
   but we provide it for consistency with the C usage.
   hidden_proto doesn't make sense for assembly but the equivalent
   is to call via the HIDDEN_JUMPTARGET macro instead of JUMPTARGET.  */
#  define hidden_def(name)	strong_alias (name, __GI_##name)
#  define hidden_weak(name)	hidden_def (name)
#  define hidden_ver(local, name) strong_alias (local, __GI_##name)
#  define hidden_data_def(name)	strong_data_alias (name, __GI_##name)
#  define hidden_data_weak(name)	hidden_data_def (name)
#  define hidden_data_ver(local, name) strong_data_alias (local, __GI_##name)
#  ifdef HAVE_ASM_GLOBAL_DOT_NAME
#   define HIDDEN_JUMPTARGET(name) .__GI_##name
#  else
#   define HIDDEN_JUMPTARGET(name) __GI_##name
#  endif
# endif
#else
# ifndef __ASSEMBLER__
#  define hidden_proto(name, attrs...)
# else
#  define HIDDEN_JUMPTARGET(name) JUMPTARGET(name)
# endif /* Not  __ASSEMBLER__ */
# define hidden_weak(name)
# define hidden_def(name)
# define hidden_ver(local, name)
# define hidden_data_weak(name)
# define hidden_data_def(name)
# define hidden_data_ver(local, name)
#endif

#if !defined NOT_IN_libc
# define libc_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
# define libc_hidden_def(name) hidden_def (name)
# define libc_hidden_weak(name) hidden_weak (name)
# define libc_hidden_ver(local, name) hidden_ver (local, name)
# define libc_hidden_data_def(name) hidden_data_def (name)
# define libc_hidden_data_weak(name) hidden_data_weak (name)
# define libc_hidden_data_ver(local, name) hidden_data_ver (local, name)
#else
# define libc_hidden_proto(name, attrs...)
# define libc_hidden_def(name)
# define libc_hidden_weak(name)
# define libc_hidden_ver(local, name)
# define libc_hidden_data_def(name)
# define libc_hidden_data_weak(name)
# define libc_hidden_data_ver(local, name)
#endif

#if defined NOT_IN_libc && defined IS_IN_rtld
# define rtld_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
# define rtld_hidden_def(name) hidden_def (name)
# define rtld_hidden_weak(name) hidden_weak (name)
# define rtld_hidden_ver(local, name) hidden_ver (local, name)
# define rtld_hidden_data_def(name) hidden_data_def (name)
# define rtld_hidden_data_weak(name) hidden_data_weak (name)
# define rtld_hidden_data_ver(local, name) hidden_data_ver (local, name)
#else
# define rtld_hidden_proto(name, attrs...)
# define rtld_hidden_def(name)
# define rtld_hidden_weak(name)
# define rtld_hidden_ver(local, name)
# define rtld_hidden_data_def(name)
# define rtld_hidden_data_weak(name)
# define rtld_hidden_data_ver(local, name)
#endif

#if defined NOT_IN_libc && defined IS_IN_libm
# define libm_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
# define libm_hidden_def(name) hidden_def (name)
# define libm_hidden_weak(name) hidden_weak (name)
# define libm_hidden_ver(local, name) hidden_ver (local, name)
# define libm_hidden_data_def(name) hidden_data_def (name)
# define libm_hidden_data_weak(name) hidden_data_weak (name)
# define libm_hidden_data_ver(local, name) hidden_data_ver (local, name)
#else
# define libm_hidden_proto(name, attrs...)
# define libm_hidden_def(name)
# define libm_hidden_weak(name)
# define libm_hidden_ver(local, name)
# define libm_hidden_data_def(name)
# define libm_hidden_data_weak(name)
# define libm_hidden_data_ver(local, name)
#endif

#if defined NOT_IN_libc && defined IS_IN_libresolv
# define libresolv_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
# define libresolv_hidden_def(name) hidden_def (name)
# define libresolv_hidden_weak(name) hidden_weak (name)
# define libresolv_hidden_ver(local, name) hidden_ver (local, name)
# define libresolv_hidden_data_def(name) hidden_data_def (name)
# define libresolv_hidden_data_weak(name) hidden_data_weak (name)
# define libresolv_hidden_data_ver(local, name) hidden_data_ver (local, name)
#else
# define libresolv_hidden_proto(name, attrs...)
# define libresolv_hidden_def(name)
# define libresolv_hidden_weak(name)
# define libresolv_hidden_ver(local, name)
# define libresolv_hidden_data_def(name)
# define libresolv_hidden_data_weak(name)
# define libresolv_hidden_data_ver(local, name)
#endif

#if defined NOT_IN_libc && defined IS_IN_librt
# define librt_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
# define librt_hidden_def(name) hidden_def (name)
# define librt_hidden_weak(name) hidden_weak (name)
# define librt_hidden_ver(local, name) hidden_ver (local, name)
# define librt_hidden_data_def(name) hidden_data_def (name)
# define librt_hidden_data_weak(name) hidden_data_weak (name)
# define librt_hidden_data_ver(local, name) hidden_data_ver (local, name)
#else
# define librt_hidden_proto(name, attrs...)
# define librt_hidden_def(name)
# define librt_hidden_weak(name)
# define librt_hidden_ver(local, name)
# define librt_hidden_data_def(name)
# define librt_hidden_data_weak(name)
# define librt_hidden_data_ver(local, name)
#endif

#if defined NOT_IN_libc && defined IS_IN_libdl
# define libdl_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
# define libdl_hidden_def(name) hidden_def (name)
# define libdl_hidden_weak(name) hidden_weak (name)
# define libdl_hidden_ver(local, name) hidden_ver (local, name)
# define libdl_hidden_data_def(name) hidden_data_def (name)
# define libdl_hidden_data_weak(name) hidden_data_weak (name)
# define libdl_hidden_data_ver(local, name) hidden_data_ver (local, name)
#else
# define libdl_hidden_proto(name, attrs...)
# define libdl_hidden_def(name)
# define libdl_hidden_weak(name)
# define libdl_hidden_ver(local, name)
# define libdl_hidden_data_def(name)
# define libdl_hidden_data_weak(name)
# define libdl_hidden_data_ver(local, name)
#endif

#if defined NOT_IN_libc && defined IS_IN_libnss_files
# define libnss_files_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
# define libnss_files_hidden_def(name) hidden_def (name)
# define libnss_files_hidden_weak(name) hidden_weak (name)
# define libnss_files_hidden_ver(local, name) hidden_ver (local, name)
# define libnss_files_hidden_data_def(name) hidden_data_def (name)
# define libnss_files_hidden_data_weak(name) hidden_data_weak (name)
# define libnss_files_hidden_data_ver(local, name) hidden_data_ver(local, name)
#else
# define libnss_files_hidden_proto(name, attrs...)
# define libnss_files_hidden_def(name)
# define libnss_files_hidden_weak(name)
# define libnss_files_hidden_ver(local, name)
# define libnss_files_hidden_data_def(name)
# define libnss_files_hidden_data_weak(name)
# define libnss_files_hidden_data_ver(local, name)
#endif

#if defined NOT_IN_libc && defined IS_IN_libnsl
# define libnsl_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
# define libnsl_hidden_def(name) hidden_def (name)
# define libnsl_hidden_weak(name) hidden_weak (name)
# define libnsl_hidden_ver(local, name) hidden_ver (local, name)
# define libnsl_hidden_data_def(name) hidden_data_def (name)
# define libnsl_hidden_data_weak(name) hidden_data_weak (name)
# define libnsl_hidden_data_ver(local, name) hidden_data_ver (local, name)
#else
# define libnsl_hidden_proto(name, attrs...)
# define libnsl_hidden_def(name)
# define libnsl_hidden_weak(name)
# define libnsl_hidden_ver(local, name)
# define libnsl_hidden_data_def(name)
# define libnsl_hidden_data_weak(name)
# define libnsl_hidden_data_ver(local, name)
#endif

#if defined NOT_IN_libc && defined IS_IN_libnss_nisplus
# define libnss_nisplus_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
# define libnss_nisplus_hidden_def(name) hidden_def (name)
# define libnss_nisplus_hidden_weak(name) hidden_weak (name)
# define libnss_nisplus_hidden_ver(local, name) hidden_ver (local, name)
# define libnss_nisplus_hidden_data_def(name) hidden_data_def (name)
# define libnss_nisplus_hidden_data_weak(name) hidden_data_weak (name)
# define libnss_nisplus_hidden_data_ver(local, name) hidden_data_ver (local, name)
#else
# define libnss_nisplus_hidden_proto(name, attrs...)
# define libnss_nisplus_hidden_def(name)
# define libnss_nisplus_hidden_weak(name)
# define libnss_nisplus_hidden_ver(local, name)
# define libnss_nisplus_hidden_data_def(name)
# define libnss_nisplus_hidden_data_weak(name)
# define libnss_nisplus_hidden_data_ver(local, name)
#endif

#ifdef HAVE_BUILTIN_REDIRECTION
# define libc_hidden_builtin_proto(name, attrs...) libc_hidden_proto (name, ##attrs)
# define libc_hidden_builtin_def(name) libc_hidden_def (name)
# define libc_hidden_builtin_weak(name) libc_hidden_weak (name)
# define libc_hidden_builtin_ver(local, name) libc_hidden_ver (local, name)
# ifdef __ASSEMBLER__
#  define HIDDEN_BUILTIN_JUMPTARGET(name) HIDDEN_JUMPTARGET(name)
# endif
#else
# define libc_hidden_builtin_proto(name, attrs...)
# define libc_hidden_builtin_def(name)
# define libc_hidden_builtin_weak(name)
# define libc_hidden_builtin_ver(local, name)
# ifdef __ASSEMBLER__
#  define HIDDEN_BUILTIN_JUMPTARGET(name) JUMPTARGET(name)
# endif
#endif

#if defined NOT_IN_libc && defined IS_IN_libutil
# define libutil_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
# define libutil_hidden_def(name) hidden_def (name)
# define libutil_hidden_weak(name) hidden_weak (name)
# define libutil_hidden_ver(local, name) hidden_ver (local, name)
# define libutil_hidden_data_def(name) hidden_data_def (name)
# define libutil_hidden_data_weak(name) hidden_data_weak (name)
# define libutil_hidden_data_ver(local, name) hidden_data_ver (local, name)
#else
# define libutil_hidden_proto(name, attrs...)
# define libutil_hidden_def(name)
# define libutil_hidden_weak(name)
# define libutil_hidden_ver(local, name)
# define libutil_hidden_data_def(name)
# define libutil_hidden_data_weak(name)
# define libutil_hidden_data_ver(local, name)
#endif

/* Get some dirty hacks.  */
#include <symbol-hacks.h>

/* Move compatibility symbols out of the way by placing them all in a
   special section.  */
#ifndef __ASSEMBLER__
# define attribute_compat_text_section \
    __attribute__ ((section (".text.compat")))
# define attribute_compat_data_section \
    __attribute__ ((section (".data.compat")))
#else
# define compat_text_section .section ".text.compat", "ax";
# define compat_data_section .section ".data.compat", "aw";
#endif

#endif /* libc-symbols.h */