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bionic/libc/include/sys/cdefs_elf.h

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auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
/* $NetBSD: cdefs_elf.h,v 1.22 2005/02/26 22:25:34 perry Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#ifndef _SYS_CDEFS_ELF_H_
#define _SYS_CDEFS_ELF_H_
#ifdef __LEADING_UNDERSCORE
#define _C_LABEL(x) __CONCAT(_,x)
#define _C_LABEL_STRING(x) "_"x
#else
#define _C_LABEL(x) x
#define _C_LABEL_STRING(x) x
#endif
#define ___RENAME(x) __asm__(___STRING(_C_LABEL(x)))
#define __indr_reference(sym,alias) /* nada, since we do weak refs */
#define __strong_alias(alias,sym) \
__asm__(".global " _C_LABEL_STRING(#alias) "\n" \
_C_LABEL_STRING(#alias) " = " _C_LABEL_STRING(#sym));
#define __weak_alias(alias,sym) \
__asm__(".weak " _C_LABEL_STRING(#alias) "\n" \
_C_LABEL_STRING(#alias) " = " _C_LABEL_STRING(#sym));
#define __weak_extern(sym) \
__asm__(".weak " _C_LABEL_STRING(#sym));
Move bionic over to GCC's 'warning' attribute. This is a better solution than the old __warn_references because it's a compile-time rather than link-time warning, it doesn't rely on something that doesn't appear to be supported by gold (which is why you only used to see these warnings on mips builds), and the errors refer to the exact call site(s) rather than just telling you which object file contains a reference to the bad function. This is primarily so we can build bionic for aarch64; building libc.so caused these warnings to fire (because link time is the wrong time) and warnings are errors. Change-Id: I5df9281b2a9d98b164a9b11807ea9472c6faa9e3
2013-12-18 05:43:30 +01:00
/* We use __warnattr instead of __warn_references.
* TODO: remove this and put an empty definition in one of the upstream-* compatibility headers.
*/
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
#define __warn_references(sym,msg) \
Move bionic over to GCC's 'warning' attribute. This is a better solution than the old __warn_references because it's a compile-time rather than link-time warning, it doesn't rely on something that doesn't appear to be supported by gold (which is why you only used to see these warnings on mips builds), and the errors refer to the exact call site(s) rather than just telling you which object file contains a reference to the bad function. This is primarily so we can build bionic for aarch64; building libc.so caused these warnings to fire (because link time is the wrong time) and warnings are errors. Change-Id: I5df9281b2a9d98b164a9b11807ea9472c6faa9e3
2013-12-18 05:43:30 +01:00
/*__asm__(".section .gnu.warning." #sym "\n\t.ascii \"" msg "\"\n\t.text");*/
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
#define __SECTIONSTRING(_sec, _str) \
__asm__(".section " #_sec "\n\t.asciz \"" _str "\"\n\t.previous")
Use -fvisibility=hidden to build libc_gdtoa. Bug: 12177745 Change-Id: Ia4ac71e1a3a237e764c809cc591622f8952ed642
2014-04-22 21:32:49 +02:00
/* Used to tag non-static symbols that are private and never exposed by the shared library. */
#define __LIBC_HIDDEN__ __attribute__((visibility ("hidden")))
Hide the symbol of helper function __libc_android_abort Ideally __libc_android_abort would be static, but it could not be because gcc would not allow calling a static function from an asm statement. Instead, using GCC visibility is work around. Change-Id: Ifff6b9957ca3f0fc03c75c3e42582a48d43cefa2
2010-09-27 13:23:06 +02:00
Hide _tolower_tab_ and _toupper_tab_ on LP64. We can't hide them on LP32 because they appeared in NDK headers. Bug: 11156955 Change-Id: I22bf5a0f4d330c04b49565bc598cd0568128d4fc
2014-06-18 20:44:00 +02:00
/* Like __LIBC_HIDDEN__, but preserves binary compatibility for LP32. */
#ifdef __LP64__
#define __LIBC64_HIDDEN__ __LIBC_HIDDEN__
#else
#define __LIBC64_HIDDEN__
#endif
Use -fvisibility=hidden to build libc_gdtoa. Bug: 12177745 Change-Id: Ia4ac71e1a3a237e764c809cc591622f8952ed642
2014-04-22 21:32:49 +02:00
/* Used to tag non-static symbols that are public and exposed by the shared library. */
#define __LIBC_ABI_PUBLIC__ __attribute__((visibility ("default")))
libc: Define new symbol visibility macros This patch defines a few new macros that can be used to control the visibility of symbols exported by the C library: - ENTRY_PRIVATE() can be used in assembly sources to indicate that an assembler function should have "hidden" visibility, i.e. will never be exported by the C library's shared library. This is the equivalent of using __LIBC_HIDDEN__ for a C function, but ENTRY_PRIVATE() works like ENTRY(), and must be used with END() to tag the end of the function. - __LIBC_ABI_PUBLIC__ can be used to tag a C functions as being part of the C library's public ABI. This is important for a few functions that must be exposed by the NDK to maintain binary compatibility. Once a symbol has been tagged with this macro, it shall *never* be removed from the library, even if it becomes directly unused due to implementation changes (e.g. __is_threaded). - __LIBC_ABI_PRIVATE__ can be used for C functions that should always be exported by the C library because they are used by other libraries in the platform, but should not be exposed by the NDK. It is possible to remove such symbols from the implementation if all callers are also modified. + Add missing END() assembly macro for x86 Change-Id: Ia96236ea0dbec41d57bea634b39d246b30e5e234
2012-01-23 15:15:30 +01:00
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
#define __IDSTRING(_n,_s) __SECTIONSTRING(.ident,_s)
#define __RCSID(_s) __IDSTRING(rcsid,_s)
#define __SCCSID(_s)
#define __SCCSID2(_s)
#if 0 /* XXX userland __COPYRIGHTs have \ns in them */
#define __COPYRIGHT(_s) __SECTIONSTRING(.copyright,_s)
#else
#define __COPYRIGHT(_s) \
static const char copyright[] \
__attribute__((__unused__,__section__(".copyright"))) = _s
#endif
#define __KERNEL_RCSID(_n, _s) __RCSID(_s)
#define __KERNEL_SCCSID(_n, _s)
#if 0 /* XXX see above */
#define __KERNEL_COPYRIGHT(_n, _s) __COPYRIGHT(_s)
#else
#define __KERNEL_COPYRIGHT(_n, _s) __SECTIONSTRING(.copyright, _s)
#endif
#ifndef __lint__
#define __link_set_make_entry(set, sym) \
static void const * const __link_set_##set##_sym_##sym \
__section("link_set_" #set) __used = &sym
#define __link_set_make_entry2(set, sym, n) \
static void const * const __link_set_##set##_sym_##sym##_##n \
__section("link_set_" #set) __used = &sym[n]
#else
#define __link_set_make_entry(set, sym) \
extern void const * const __link_set_##set##_sym_##sym
#define __link_set_make_entry2(set, sym, n) \
extern void const * const __link_set_##set##_sym_##sym##_##n
#endif /* __lint__ */
#define __link_set_add_text(set, sym) __link_set_make_entry(set, sym)
#define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym)
#define __link_set_add_data(set, sym) __link_set_make_entry(set, sym)
#define __link_set_add_bss(set, sym) __link_set_make_entry(set, sym)
#define __link_set_add_text2(set, sym, n) __link_set_make_entry2(set, sym, n)
#define __link_set_add_rodata2(set, sym, n) __link_set_make_entry2(set, sym, n)
#define __link_set_add_data2(set, sym, n) __link_set_make_entry2(set, sym, n)
#define __link_set_add_bss2(set, sym, n) __link_set_make_entry2(set, sym, n)
#define __link_set_decl(set, ptype) \
extern ptype * const __start_link_set_##set[]; \
extern ptype * const __stop_link_set_##set[] \
#define __link_set_start(set) (__start_link_set_##set)
#define __link_set_end(set) (__stop_link_set_##set)
#define __link_set_count(set) \
(__link_set_end(set) - __link_set_start(set))
#endif /* !_SYS_CDEFS_ELF_H_ */
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