forked from Imagelibrary/rtems
524839568d
Make sure that a user-provided stack size is the minimum size allocated for the stack. Make sure we meet the stack alignment requirement also for CPU ports with CPU_STACK_ALIGNMENT > CPU_HEAP_ALIGNMENT.
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @ingroup RTEMSScoreTLS
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*
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* @brief This source file contains the implementation of
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* _TLS_Get_allocation_size().
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*/
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/*
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* Copyright (C) 2014, 2020 embedded brains GmbH (http://www.embedded-brains.de)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems/score/tls.h>
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#include <rtems/score/interr.h>
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#include <rtems/score/thread.h>
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static uintptr_t _TLS_Allocation_size;
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uintptr_t _TLS_Get_allocation_size( void )
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{
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uintptr_t size;
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uintptr_t allocation_size;
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size = _TLS_Get_size();
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if ( size == 0 ) {
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return 0;
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}
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allocation_size = _TLS_Allocation_size;
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if ( allocation_size == 0 ) {
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uintptr_t alignment;
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alignment = _TLS_Align_up( (uintptr_t) _TLS_Alignment );
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allocation_size = size;
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allocation_size += _TLS_Get_thread_control_block_area_size( alignment );
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#ifndef __i386__
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allocation_size += sizeof( TLS_Dynamic_thread_vector );
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#endif
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/*
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* The TLS area is allocated in the thread storage area. Each allocation
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* shall meet the stack alignment requirement.
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*/
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allocation_size = _TLS_Align_up( allocation_size );
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/*
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* The stack allocator does not support aligned allocations. Allocate
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* enough to do the alignment manually.
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*/
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if ( alignment > CPU_STACK_ALIGNMENT ) {
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_Assert( alignment % CPU_STACK_ALIGNMENT == 0 );
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allocation_size += alignment - CPU_STACK_ALIGNMENT;
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}
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if ( _Thread_Maximum_TLS_size != 0 ) {
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if ( allocation_size <= _Thread_Maximum_TLS_size ) {
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_Assert( _Thread_Maximum_TLS_size % CPU_STACK_ALIGNMENT == 0 );
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allocation_size = _Thread_Maximum_TLS_size;
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} else {
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_Internal_error( INTERNAL_ERROR_TOO_LARGE_TLS_SIZE );
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}
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}
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_TLS_Allocation_size = allocation_size;
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}
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return allocation_size;
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}
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