mirror of
https://git.rtems.org/rtems-libbsd/
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124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/*
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* Copyright (c) 2015 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Dornierstr. 4
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#ifndef _RTEMS_LINKERSET_H
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#define _RTEMS_LINKERSET_H
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#include <rtems/score/basedefs.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/**
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* @brief Instructs the compiler to place a specific variable or function in
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* the specified section.
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*/
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#if defined(__GNUC__)
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#define RTEMS_SECTION( _section ) __attribute__((__section__(_section)))
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#else
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#define RTEMS_SECTION( _section )
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#endif
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/**
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* @brief Instructs the compiler that a specific variable or function is used.
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*/
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#if defined(__GNUC__)
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#define RTEMS_USED __attribute__((__used__))
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#else
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#define RTEMS_USED
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#endif
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#define RTEMS_LINKER_SET_BEGIN( set ) \
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_Linker_set_##set##_begin
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#define RTEMS_LINKER_SET_END( set ) \
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_Linker_set_##set##_end
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#define RTEMS_LINKER_SET_SIZE( set ) \
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( (size_t) ( _Linker_set_##set##_end - _Linker_set_##set##_begin ) )
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#define RTEMS_LINKER_ROSET_DECLARE( set, type ) \
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extern type volatile const RTEMS_LINKER_SET_BEGIN( set )[0]; \
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extern type volatile const RTEMS_LINKER_SET_END( set )[0]
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#define RTEMS_LINKER_ROSET( set, type ) \
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type volatile const RTEMS_LINKER_SET_BEGIN( set )[0] \
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RTEMS_SECTION( ".rtemsroset." #set ".begin" ) RTEMS_USED; \
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type volatile const RTEMS_LINKER_SET_END( set )[0] \
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RTEMS_SECTION( ".rtemsroset." #set ".end" ) RTEMS_USED
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#define RTEMS_LINKER_ROSET_ITEM_DECLARE( set, type, item ) \
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extern type volatile const _Linker_set_##set##_##item
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#define RTEMS_LINKER_ROSET_ITEM_REFERENCE( set, type, item ) \
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static type volatile const * const _Set_reference_##set##_##item \
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RTEMS_SECTION( ".rtemsroset.reference" ) RTEMS_USED = \
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&_Linker_set_##set##_##item
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#define RTEMS_LINKER_ROSET_ITEM_ORDERED( set, type, item, order ) \
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type volatile const _Linker_set_##set##_##item \
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RTEMS_SECTION( ".rtemsroset." #set ".content.0." RTEMS_XSTRING( order ) ) \
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RTEMS_USED
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#define RTEMS_LINKER_ROSET_ITEM( set, type, item ) \
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type volatile const _Linker_set_##set##_##item \
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RTEMS_SECTION( ".rtemsroset." #set ".content.1" ) RTEMS_USED
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#define RTEMS_LINKER_ROSET_CONTENT( set, decl ) \
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decl \
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RTEMS_SECTION( ".rtemsroset." #set ".content" )
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#define RTEMS_LINKER_RWSET_DECLARE( set, type ) \
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extern type volatile RTEMS_LINKER_SET_BEGIN( set )[0]; \
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extern type volatile RTEMS_LINKER_SET_END( set )[0]
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#define RTEMS_LINKER_RWSET( set, type ) \
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type volatile RTEMS_LINKER_SET_BEGIN( set )[0] \
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RTEMS_SECTION( ".rtemsrwset." #set ".begin" ) RTEMS_USED; \
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type volatile RTEMS_LINKER_SET_END( set )[0] \
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RTEMS_SECTION( ".rtemsrwset." #set ".end" ) RTEMS_USED
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#define RTEMS_LINKER_RWSET_ITEM_DECLARE( set, type, item ) \
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extern type volatile _Linker_set_##set##_##item
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/*
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* The .rtemsroset is here not a typo. We must ensure that the references are
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* not a victim of the garbage collection of the linker. Thus, we place them
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* in a dedicated area of the RTEMS read-only linker set section.
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*/
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#define RTEMS_LINKER_RWSET_ITEM_REFERENCE( set, type, item ) \
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static type volatile * const _Set_reference_##set##_##item \
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RTEMS_SECTION( ".rtemsroset.reference" ) RTEMS_USED = \
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&_Linker_set_##set##_##item
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#define RTEMS_LINKER_RWSET_ITEM_ORDERED( set, type, item, order ) \
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type volatile _Linker_set_##set##_##item \
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RTEMS_SECTION( ".rtemsrwset." #set ".content.0." RTEMS_XSTRING( order ) ) \
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RTEMS_USED
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#define RTEMS_LINKER_RWSET_ITEM( set, type, item ) \
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type volatile _Linker_set_##set##_##item \
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RTEMS_SECTION( ".rtemsrwset." #set ".content.1" ) RTEMS_USED
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#define RTEMS_LINKER_RWSET_CONTENT( set, decl ) \
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decl \
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RTEMS_SECTION( ".rtemsrwset." #set ".content" )
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* _RTEMS_LINKERSET_H */
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