tls.h

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00001 /*
00002  * Copyright (c) 2006 Jakub Jermar
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  *
00009  * - Redistributions of source code must retain the above copyright
00010  *   notice, this list of conditions and the following disclaimer.
00011  * - Redistributions in binary form must reproduce the above copyright
00012  *   notice, this list of conditions and the following disclaimer in the
00013  *   documentation and/or other materials provided with the distribution.
00014  * - The name of the author may not be used to endorse or promote products
00015  *   derived from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00019  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00020  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00022  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00023  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00024  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00025  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00026  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  */
00028 
00035 #ifndef LIBC_ia64_TLS_H_
00036 #define LIBC_ia64_TLS_H_
00037 
00038 #define CONFIG_TLS_VARIANT_1
00039 
00040 #include <sys/types.h>
00041 
00042 /* This structure must be exactly 16 bytes long */
00043 typedef struct {
00044         void *dtv; /* unused in static linking*/
00045         void *fibril_data;
00046 } tcb_t;
00047 
00048 static inline void __tcb_set(tcb_t *tcb)
00049 {
00050         asm volatile ("mov r13 = %0\n" : : "r" (tcb) : "r13");
00051 }
00052 
00053 static inline tcb_t *__tcb_get(void)
00054 {
00055         void *retval;
00056 
00057         asm volatile ("mov %0 = r13\n" : "=r" (retval));
00058 
00059         return retval;
00060 }
00061 
00062 #endif
00063 

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