76 lines
2.9 KiB
C
76 lines
2.9 KiB
C
|
/****************************************************************************
|
||
|
|
* arch/x86/include/tls.h
|
||
|
|
*
|
||
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
||
|
|
* contributor license agreements. See the NOTICE file distributed with
|
||
|
|
* this work for additional information regarding copyright ownership. The
|
||
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
||
|
|
* "License"); you may not use this file except in compliance with the
|
||
|
|
* License. You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||
|
|
* License for the specific language governing permissions and limitations
|
||
|
|
* under the License.
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#ifndef __ARCH_X86_INCLUDE_TLS_H
|
||
|
|
#define __ARCH_X86_INCLUDE_TLS_H
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Included Files
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#include <nuttx/config.h>
|
||
|
|
#include <assert.h>
|
||
|
|
#include <nuttx/arch.h>
|
||
|
|
#include <nuttx/tls.h>
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Inline Functions
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Name: up_tls_info
|
||
|
|
*
|
||
|
|
* Description:
|
||
|
|
* Return the TLS information structure for the currently executing thread.
|
||
|
|
* When TLS is enabled, up_createstack() will align allocated stacks to
|
||
|
|
* the TLS_STACK_ALIGN value. An instance of the following structure will
|
||
|
|
* be implicitly positioned at the "lower" end of the stack. Assuming a
|
||
|
|
* "push down" stack, this is at the "far" end of the stack (and can be
|
||
|
|
* clobbered if the stack overflows).
|
||
|
|
*
|
||
|
|
* If an MCU has a "push up" then that TLS structure will lie at the top
|
||
|
|
* of the stack and stack allocation and initialization logic must take
|
||
|
|
* care to preserve this structure content.
|
||
|
|
*
|
||
|
|
* The stack memory is fully accessible to user mode threads.
|
||
|
|
*
|
||
|
|
* Input Parameters:
|
||
|
|
* None
|
||
|
|
*
|
||
|
|
* Returned Value:
|
||
|
|
* A pointer to TLS info structure at the beginning of the STACK memory
|
||
|
|
* allocation. This is essentially an application of the TLS_INFO(sp)
|
||
|
|
* macro and has a platform dependency only in the manner in which the
|
||
|
|
* stack pointer (sp) is obtained and interpreted.
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#ifdef CONFIG_TLS_ALIGNED
|
||
|
|
static inline FAR struct tls_info_s *up_tls_info(void)
|
||
|
|
{
|
||
|
|
DEBUGASSERT(!up_interrupt_context());
|
||
|
|
return TLS_INFO((uintptr_t)up_getsp());
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
# define up_tls_info() tls_get_info()
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* __ARCH_X86_INCLUDE_TLS_H */
|