89 lines
3.6 KiB
C
89 lines
3.6 KiB
C
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/****************************************************************************
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* arch/sin/include/tls.h
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* 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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****************************************************************************/
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#ifndef __ARCH_SIM_INCLUDE_TLS_H
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#define __ARCH_SIM_INCLUDE_TLS_H 1
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <nuttx/arch.h>
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#include <nuttx/tls.h>
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#ifdef CONFIG_TLS
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/****************************************************************************
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* Inline Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_tls_info
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*
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* Description:
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* Return the TLS information structure for the currently executing thread.
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* When TLS is enabled, up_createstack() will align allocated stacks to
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* the TLS_STACK_ALIGN value. An instance of the following structure will
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* be implicitly positioned at the "lower" end of the stack. Assuming a
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* "push down" stack, this is at the "far" end of the stack (and can be
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* clobbered if the stack overflows).
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*
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* If an MCU has a "push up" then that TLS structure will lie at the top
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* of the stack and stack allocation and initialization logic must take
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* care to preserve this structure content.
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*
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* The stack memory is fully accessible to user mode threads.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* A pointer to TLS info structure at the beginning of the STACK memory
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* allocation. This is essentially an application of the TLS_INFO(sp)
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* macro and has a platform dependency only in the manner in which the
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* stack pointer (sp) is obtained and interpreted.
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*
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****************************************************************************/
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static inline FAR struct tls_info_s *up_tls_info(void)
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{
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return TLS_INFO((uintptr_t)__builtin_frame_address(0));
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}
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#endif /* CONFIG_TLS */
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#endif /* __ARCH_SIM_INCLUDE_TLS_H */
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