70 lines
2.9 KiB
C
70 lines
2.9 KiB
C
/*-
|
|
* Copyright (c) 2004 Doug Rabson
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Semi-public interface from thread libraries to rtld for managing
|
|
* TLS.
|
|
*/
|
|
|
|
#ifndef _RTLD_TLS_H_
|
|
#define _RTLD_TLS_H_
|
|
|
|
/*
|
|
* Allocate a TLS block for a new thread. The memory allocated will
|
|
* include 'tcbsize' bytes aligned to a 'tcbalign' boundary (in bytes)
|
|
* for the thread library's private purposes. The location of the TCB
|
|
* block is returned by this function. For architectures using
|
|
* 'Variant I' TLS, the thread local storage follows the TCB, and for
|
|
* 'Variant II', the thread local storage precedes it. For
|
|
* architectures using the 'Variant II' model (e.g. i386, amd64,
|
|
* sparc64), the TCB must begin with two pointer fields which are used
|
|
* by rtld for its TLS implementation. For the 'Variant I' model, the
|
|
* TCB must begin with a single pointer field for rtld's
|
|
* implementation.
|
|
*
|
|
* If the value of 'oldtls' is non-NULL, the new TLS block will be
|
|
* initialised using the values contained in 'oldtls' and 'oldtls'
|
|
* will be freed. This is typically used when initialising a thread
|
|
* library to migrate from using the initial bootstrap TLS block
|
|
* created by rtld to one which contains suitable thread library
|
|
* private data.
|
|
*
|
|
* The value returned from this function is suitable for installing
|
|
* directly into the thread pointer register.
|
|
*/
|
|
extern void *_rtld_allocate_tls(void* oldtls, size_t tcbsize, size_t tcbalign);
|
|
|
|
/*
|
|
* Free a TLS block allocated using _rtld_allocate_tls(). The tcbsize
|
|
* and tcbalign parameters must be the same as those used to allocate
|
|
* the block.
|
|
*/
|
|
extern void _rtld_free_tls(void *tcb, size_t tcbsize, size_t tcbalign);
|
|
|
|
#endif
|