WebSVN – HelenOS – Diff – /trunk/uspace/libc/arch/sparc64/src/thread.c


/*
 * Copyright (c) 2006 Ondrej Palkovsky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */
 
/** @addtogroup libcsparc64 sparc64
 * @ingroup lc
 * @{
 */
/** @file
 *
 */
 
#include <thread.h>
#include <malloc.h>
 
/*
 * sparc64 uses thread-local storage data structures, variant II, as described
 * in:
 *  Drepper U.: ELF Handling For Thread-Local Storage, 2005
 */
 
/** Allocate TLS variant II data structures for a thread.
 *
 * Only static model is supported.
 *
 * @param data Pointer to pointer to thread local data. This is actually an
 *  output argument.
 * @param size Size of thread local data.
 * @return Pointer to TCB structure.
 */
tcb_t * __alloc_tls(void **data, size_t size)
{
    tcb_t *tcb;
   
    *data = malloc(sizeof(tcb_t) + size);
 
    tcb = (tcb_t *) (*data + size);
    tcb->self = tcb;
 
    return tcb;
}
 
/** Free TLS variant II data structures of a thread.
 *
 * Only static model is supported.
 *
 * @param tcb Pointer to TCB structure.
 * @param size Size of thread local data.
 */
void __free_tls_arch(tcb_t *tcb, size_t size)
{
    void *start = ((void *) tcb) - size;
    free(start);
}
 
/** @}
 */
 

Subversion Repositories HelenOS

(root)/trunk/uspace/libc/arch/sparc64/src/thread.c – Rev 2061 → 2071

Rev 2061		Rev 2071
1	/*	1	/*
2	* Copyright (C) 2006 Ondrej Palkovsky	2	* Copyright (c) 2006 Ondrej Palkovsky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup libcsparc64 sparc64	29	/** @addtogroup libcsparc64 sparc64
30	* @ingroup lc	30	* @ingroup lc
31	* @{	31	* @{
32	*/	32	*/
33	/** @file	33	/** @file
34	*	34	*
35	*/	35	*/
36		36
37	#include <thread.h>	37	#include <thread.h>
38	#include <malloc.h>	38	#include <malloc.h>
39		39
40	/*	40	/*
41	* sparc64 uses thread-local storage data structures, variant II, as described	41	* sparc64 uses thread-local storage data structures, variant II, as described
42	* in:	42	* in:
43	* Drepper U.: ELF Handling For Thread-Local Storage, 2005	43	* Drepper U.: ELF Handling For Thread-Local Storage, 2005
44	*/	44	*/
45		45
46	/** Allocate TLS variant II data structures for a thread.	46	/** Allocate TLS variant II data structures for a thread.
47	*	47	*
48	* Only static model is supported.	48	* Only static model is supported.
49	*	49	*
50	* @param data Pointer to pointer to thread local data. This is actually an	50	* @param data Pointer to pointer to thread local data. This is actually an
51	* output argument.	51	* output argument.
52	* @param size Size of thread local data.	52	* @param size Size of thread local data.
53	* @return Pointer to TCB structure.	53	* @return Pointer to TCB structure.
54	*/	54	*/
55	tcb_t * __alloc_tls(void **data, size_t size)	55	tcb_t * __alloc_tls(void **data, size_t size)
56	{	56	{
57	tcb_t *tcb;	57	tcb_t *tcb;
58		58
59	*data = malloc(sizeof(tcb_t) + size);	59	*data = malloc(sizeof(tcb_t) + size);
60		60
61	tcb = (tcb_t ) (data + size);	61	tcb = (tcb_t ) (data + size);
62	tcb->self = tcb;	62	tcb->self = tcb;
63		63
64	return tcb;	64	return tcb;
65	}	65	}
66		66
67	/** Free TLS variant II data structures of a thread.	67	/** Free TLS variant II data structures of a thread.
68	*	68	*
69	* Only static model is supported.	69	* Only static model is supported.
70	*	70	*
71	* @param tcb Pointer to TCB structure.	71	* @param tcb Pointer to TCB structure.
72	* @param size Size of thread local data.	72	* @param size Size of thread local data.
73	*/	73	*/
74	void __free_tls_arch(tcb_t *tcb, size_t size)	74	void __free_tls_arch(tcb_t *tcb, size_t size)
75	{	75	{
76	void start = ((void ) tcb) - size;	76	void start = ((void ) tcb) - size;
77	free(start);	77	free(start);
78	}	78	}
79		79
80	/** @}	80	/** @}
81	*/	81	*/
82		82