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  1. /*
  2.  * Copyright (c) 2006 Ondrej Palkovsky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  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
  15.  *   derived from this software without specific prior written permission.
  16.  *
  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
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  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
  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
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup libcsparc64 sparc64
  30.  * @ingroup lc
  31.  * @{
  32.  */
  33. /** @file
  34.  *
  35.  */
  36.  
  37. #include <thread.h>
  38. #include <malloc.h>
  39.  
  40. /*
  41.  * sparc64 uses thread-local storage data structures, variant II, as described
  42.  * in:
  43.  *  Drepper U.: ELF Handling For Thread-Local Storage, 2005
  44.  */
  45.  
  46. /** Allocate TLS variant II data structures for a thread.
  47.  *
  48.  * Only static model is supported.
  49.  *
  50.  * @param data Pointer to pointer to thread local data. This is actually an
  51.  *  output argument.
  52.  * @param size Size of thread local data.
  53.  * @return Pointer to TCB structure.
  54.  */
  55. tcb_t * __alloc_tls(void **data, size_t size)
  56. {
  57.     tcb_t *tcb;
  58.    
  59.     *data = malloc(sizeof(tcb_t) + size);
  60.  
  61.     tcb = (tcb_t *) (*data + size);
  62.     tcb->self = tcb;
  63.  
  64.     return tcb;
  65. }
  66.  
  67. /** Free TLS variant II data structures of a thread.
  68.  *
  69.  * Only static model is supported.
  70.  *
  71.  * @param tcb Pointer to TCB structure.
  72.  * @param size Size of thread local data.
  73.  */
  74. void __free_tls_arch(tcb_t *tcb, size_t size)
  75. {
  76.     void *start = ((void *) tcb) - size;
  77.     free(start);
  78. }
  79.  
  80. /** @}
  81.  */
  82.