serval-dna/section.h

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/*
Copyright (C) 2015 Serval Project Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __SERVAL_DNA__SECTION_H
#define __SERVAL_DNA__SECTION_H
#include "lang.h"
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/* Macros for creating named linkage sections.
*/
#define SECTION_START(X) __start_##X
#define SECTION_END(X) __stop_##X
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#if defined(HAVE_VAR_ATTRIBUTE_SECTION)
# define _SECTION_ATTRIBUTE(X) __section__(#X)
# define DECLARE_SECTION(TYPE, X) \
extern TYPE SECTION_START(X)[];\
extern TYPE SECTION_END(X)[]
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#elif defined(HAVE_VAR_ATTRIBUTE_SECTION_SEG)
# define _SECTION_ATTRIBUTE(X) __section__("__DATA,__"#X)
# define DECLARE_SECTION(TYPE, X) \
extern TYPE SECTION_START(X)[] __asm("section$start$__DATA$__" #X);\
extern TYPE SECTION_END(X)[] __asm("section$end$__DATA$__" #X)
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#else
#error "Compiler does not support __attribute__(section())"
#endif
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#if !defined(HAVE_FUNC_ATTRIBUTE_ALIGNED)
#error "Compiler does not support __attribute__(aligned())"
#elif !defined(HAVE_FUNC_ATTRIBUTE_USED)
#error "Compiler does not support __attribute__(used)"
#else
#define IN_SECTION(name) __attribute__((__used__, __aligned__(sizeof(void *)), _SECTION_ATTRIBUTE(name)))
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#endif
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#endif // __SERVAL_DNA__SECTION_H