diff options
Diffstat (limited to 'cpukit/score/include/rtems/score/tls.h')
| -rw-r--r-- | cpukit/score/include/rtems/score/tls.h | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/cpukit/score/include/rtems/score/tls.h b/cpukit/score/include/rtems/score/tls.h deleted file mode 100644 index 644e54e6f7..0000000000 --- a/cpukit/score/include/rtems/score/tls.h +++ /dev/null @@ -1,217 +0,0 @@ -/** - * @file - * - * @ingroup ScoreTLS - * - * @brief Thread-Local Storage (TLS) - */ - -/* - * Copyright (c) 2014 embedded brains GmbH. All rights reserved. - * - * embedded brains GmbH - * Dornierstr. 4 - * 82178 Puchheim - * Germany - * <rtems@embedded-brains.de> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#ifndef _RTEMS_SCORE_TLS_H -#define _RTEMS_SCORE_TLS_H - -#include <rtems/score/cpu.h> - -#include <string.h> - -#ifdef __cplusplus -extern "C" { -#endif /* __cplusplus */ - -/** - * @defgroup ScoreTLS Thread-Local Storage (TLS) - * - * @ingroup Score - * - * @brief Thread-local storage (TLS) support. - * - * Variants I and II are according to Ulrich Drepper, "ELF Handling For - * Thread-Local Storage". - * - * @{ - */ - -extern char _TLS_Data_begin[]; - -extern char _TLS_Data_end[]; - -extern char _TLS_Data_size[]; - -extern char _TLS_BSS_begin[]; - -extern char _TLS_BSS_end[]; - -extern char _TLS_BSS_size[]; - -extern char _TLS_Size[]; - -extern char _TLS_Alignment[]; - -typedef struct { - /* - * FIXME: Not sure if the generation number type is correct for all - * architectures. - */ - uint32_t generation_number; - - void *tls_blocks[1]; -} TLS_Dynamic_thread_vector; - -typedef struct TLS_Thread_control_block { -#ifdef __i386__ - struct TLS_Thread_control_block *tcb; -#else - TLS_Dynamic_thread_vector *dtv; - uintptr_t reserved; -#endif -} TLS_Thread_control_block; - -typedef struct { - uintptr_t module; - uintptr_t offset; -} TLS_Index; - -static inline uintptr_t _TLS_Get_size( void ) -{ - /* - * Do not use _TLS_Size here since this will lead GCC to assume that this - * symbol is not 0 and the tests for 0 will be optimized away. - */ - return (uintptr_t) _TLS_BSS_end - (uintptr_t) _TLS_Data_begin; -} - -static inline uintptr_t _TLS_Heap_align_up( uintptr_t val ) -{ - uintptr_t msk = CPU_HEAP_ALIGNMENT - 1; - - return (val + msk) & ~msk; -} - -static inline uintptr_t _TLS_Get_thread_control_block_area_size( - uintptr_t alignment -) -{ - return alignment <= sizeof(TLS_Thread_control_block) ? - sizeof(TLS_Thread_control_block) : alignment; -} - -static inline uintptr_t _TLS_Get_allocation_size( - uintptr_t size, - uintptr_t alignment -) -{ - uintptr_t allocation_size = 0; - - allocation_size += _TLS_Heap_align_up( size ); - allocation_size += _TLS_Get_thread_control_block_area_size( alignment ); - -#ifndef __i386__ - allocation_size += sizeof(TLS_Dynamic_thread_vector); -#endif - - return allocation_size; -} - -static inline void *_TLS_Copy_and_clear( void *tls_area ) -{ - tls_area = memcpy( - tls_area, - _TLS_Data_begin, - (size_t) ((uintptr_t)_TLS_Data_size) - ); - - - memset( - (char *) tls_area + (size_t)((intptr_t) _TLS_BSS_begin) - - (size_t)((intptr_t) _TLS_Data_begin), - 0, - ((size_t) (intptr_t)_TLS_BSS_size) - ); - - return tls_area; -} - -static inline void *_TLS_Initialize( - void *tls_block, - TLS_Thread_control_block *tcb, - TLS_Dynamic_thread_vector *dtv -) -{ -#ifdef __i386__ - (void) dtv; - tcb->tcb = tcb; -#else - tcb->dtv = dtv; - dtv->generation_number = 1; - dtv->tls_blocks[0] = tls_block; -#endif - - return _TLS_Copy_and_clear( tls_block ); -} - -/* Use Variant I, TLS offsets emitted by linker takes the TCB into account */ -static inline void *_TLS_TCB_at_area_begin_initialize( void *tls_area ) -{ - void *tls_block = (char *) tls_area - + _TLS_Get_thread_control_block_area_size( (uintptr_t) _TLS_Alignment ); - TLS_Thread_control_block *tcb = tls_area; - uintptr_t aligned_size = _TLS_Heap_align_up( (uintptr_t) _TLS_Size ); - TLS_Dynamic_thread_vector *dtv = (TLS_Dynamic_thread_vector *) - ((char *) tls_block + aligned_size); - - return _TLS_Initialize( tls_block, tcb, dtv ); -} - -/* Use Variant I, TLS offsets emitted by linker neglects the TCB */ -static inline void *_TLS_TCB_before_TLS_block_initialize( void *tls_area ) -{ - void *tls_block = (char *) tls_area - + _TLS_Get_thread_control_block_area_size( (uintptr_t) _TLS_Alignment ); - TLS_Thread_control_block *tcb = (TLS_Thread_control_block *) - ((char *) tls_block - sizeof(*tcb)); - uintptr_t aligned_size = _TLS_Heap_align_up( (uintptr_t) _TLS_Size ); - TLS_Dynamic_thread_vector *dtv = (TLS_Dynamic_thread_vector *) - ((char *) tls_block + aligned_size); - - return _TLS_Initialize( tls_block, tcb, dtv ); -} - -/* Use Variant II */ -static inline void *_TLS_TCB_after_TLS_block_initialize( void *tls_area ) -{ - uintptr_t size = (uintptr_t) _TLS_Size; - uintptr_t tls_align = (uintptr_t) _TLS_Alignment; - uintptr_t tls_mask = tls_align - 1; - uintptr_t heap_align = _TLS_Heap_align_up( tls_align ); - uintptr_t heap_mask = heap_align - 1; - TLS_Thread_control_block *tcb = (TLS_Thread_control_block *) - ((char *) tls_area + ((size + heap_mask) & ~heap_mask)); - void *tls_block = (char *) tcb - ((size + tls_mask) & ~tls_mask); - TLS_Dynamic_thread_vector *dtv = (TLS_Dynamic_thread_vector *) - ((char *) tcb + sizeof(*tcb)); - - _TLS_Initialize( tls_block, tcb, dtv ); - - return tcb; -} - -/** @} */ - -#ifdef __cplusplus -} -#endif /* __cplusplus */ - -#endif /* _RTEMS_SCORE_TLS_H */ |