| 1 | /*
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| 2 | * Copyright (c) 2006 Ondrej Palkovsky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libcsparc64 sparc64
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| 30 | * @ingroup lc
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| 31 | * @{
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| 32 | */
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| 33 | /** @file
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| 34 | *
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| 35 | */
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| 36 |
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| 37 | #include <thread.h>
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| 38 | #include <malloc.h>
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| 39 | #include <align.h>
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| 40 |
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| 41 | /*
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| 42 | * sparc64 uses thread-local storage data structures, variant II, as described
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| 43 | * in:
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| 44 | * Drepper U.: ELF Handling For Thread-Local Storage, 2005
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| 45 | */
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| 46 |
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| 47 | /** Allocate TLS variant II data structures for a thread.
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| 48 | *
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| 49 | * Only static model is supported.
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| 50 | *
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| 51 | * @param data Pointer to pointer to thread local data. This is actually an
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| 52 | * output argument.
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| 53 | * @param size Size of thread local data.
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| 54 | * @return Pointer to TCB structure.
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| 55 | */
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| 56 | tcb_t * __alloc_tls(void **data, size_t size)
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| 57 | {
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| 58 | tcb_t *tcb;
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| 59 |
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| 60 | size = ALIGN_UP(size, &_tls_alignment);
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| 61 | *data = memalign(&_tls_alignment, sizeof(tcb_t) + size);
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| 62 |
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| 63 | tcb = (tcb_t *) (*data + size);
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| 64 | tcb->self = tcb;
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| 65 |
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| 66 | return tcb;
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| 67 | }
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| 68 |
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| 69 | /** Free TLS variant II data structures of a thread.
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| 70 | *
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| 71 | * Only static model is supported.
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| 72 | *
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| 73 | * @param tcb Pointer to TCB structure.
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| 74 | * @param size Size of thread local data.
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| 75 | */
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| 76 | void __free_tls_arch(tcb_t *tcb, size_t size)
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| 77 | {
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| 78 | size = ALIGN_UP(size, &_tls_alignment);
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| 79 | void *start = ((void *) tcb) - size;
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| 80 | free(start);
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| 81 | }
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| 82 |
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| 83 | /** @}
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| 84 | */
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