tls.h (2291B) - Raw
1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright 2004 by Peter Grehan. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. 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 * 3. 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, 22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef _MACHINE_TLS_H_ 31 #define _MACHINE_TLS_H_ 32 33 #include <sys/_tls_variant_i.h> 34 35 #define TLS_DTV_OFFSET 0x8000 36 #define TLS_TCB_ALIGN TLS_TCB_SIZE 37 #define TLS_TP_OFFSET 0x7000 38 39 static __inline void 40 _tcb_set(struct tcb *tcb) 41 { 42 #ifdef __powerpc64__ 43 __asm __volatile("mr 13,%0" :: 44 "r" ((uint8_t *)tcb + TLS_TP_OFFSET + TLS_TCB_SIZE)); 45 #else 46 __asm __volatile("mr 2,%0" :: 47 "r" ((uint8_t *)tcb + TLS_TP_OFFSET + TLS_TCB_SIZE)); 48 #endif 49 } 50 51 static __inline struct tcb * 52 _tcb_get(void) 53 { 54 struct tcb *tcb; 55 56 #ifdef __powerpc64__ 57 __asm __volatile("addi %0,13,%1" : "=r" (tcb) : 58 "i" (-(TLS_TP_OFFSET + TLS_TCB_SIZE))); 59 #else 60 __asm __volatile("addi %0,2,%1" : "=r" (tcb) : 61 "i" (-(TLS_TP_OFFSET + TLS_TCB_SIZE))); 62 #endif 63 return (tcb); 64 } 65 66 #endif /* !_MACHINE_TLS_H_ */