c2244a2382
A first step in implementing the user-space error is force TLS to be enabled at all times. It is no longer optional
72 lines
2.8 KiB
C
72 lines
2.8 KiB
C
/****************************************************************************
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* arch/z16/include/tls.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_Z16_INCLUDE_TLS_H
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#define __ARCH_Z16_INCLUDE_TLS_H
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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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/****************************************************************************
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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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#ifdef CONFIG_TLS_ALIGNED
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# error "Aligned TLS not supported"
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#else
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# define up_tls_info() tls_get_info()
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#endif
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#endif /* __ARCH_Z16_INCLUDE_TLS_H */
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