1a091d823SDavid Xu /* 2a091d823SDavid Xu * Copyright 2004 by Peter Grehan. All rights reserved. 3a091d823SDavid Xu * 4a091d823SDavid Xu * Redistribution and use in source and binary forms, with or without 5a091d823SDavid Xu * modification, are permitted provided that the following conditions 6a091d823SDavid Xu * are met: 7a091d823SDavid Xu * 1. Redistributions of source code must retain the above copyright 8a091d823SDavid Xu * notice, this list of conditions and the following disclaimer. 9a091d823SDavid Xu * 2. Redistributions in binary form must reproduce the above copyright 10a091d823SDavid Xu * notice, this list of conditions and the following disclaimer in the 11a091d823SDavid Xu * documentation and/or other materials provided with the distribution. 12a091d823SDavid Xu * 3. The name of the author may not be used to endorse or promote products 13a091d823SDavid Xu * derived from this software without specific prior written permission. 14a091d823SDavid Xu * 15a091d823SDavid Xu * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16a091d823SDavid Xu * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17a091d823SDavid Xu * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18a091d823SDavid Xu * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19a091d823SDavid Xu * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20a091d823SDavid Xu * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21a091d823SDavid Xu * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22a091d823SDavid Xu * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23a091d823SDavid Xu * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24a091d823SDavid Xu * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25a091d823SDavid Xu * SUCH DAMAGE. 26a091d823SDavid Xu * 27a091d823SDavid Xu * $FreeBSD$ 28a091d823SDavid Xu */ 29a091d823SDavid Xu 30a091d823SDavid Xu /* 31a091d823SDavid Xu * Machine-dependent thread prototypes/definitions. 32a091d823SDavid Xu */ 33a091d823SDavid Xu #ifndef _PTHREAD_MD_H_ 34a091d823SDavid Xu #define _PTHREAD_MD_H_ 35a091d823SDavid Xu 36a091d823SDavid Xu #include <stddef.h> 37a091d823SDavid Xu #include <sys/types.h> 38a091d823SDavid Xu 39a091d823SDavid Xu #define DTV_OFFSET offsetof(struct tcb, tcb_dtv) 408e61dbecSMarcel Moolenaar #define TLS_TP_OFFSET 0x7008 41a091d823SDavid Xu 42a091d823SDavid Xu /* 43a091d823SDavid Xu * Variant I tcb. The structure layout is fixed, don't blindly 44a091d823SDavid Xu * change it. 45a091d823SDavid Xu * %r2 points to end of the structure. 46a091d823SDavid Xu */ 47a091d823SDavid Xu struct tcb { 48a091d823SDavid Xu void *tcb_dtv; 49a091d823SDavid Xu struct pthread *tcb_thread; 50a091d823SDavid Xu }; 51a091d823SDavid Xu 52a091d823SDavid Xu struct tcb *_tcb_ctor(struct pthread *, int); 53a091d823SDavid Xu void _tcb_dtor(struct tcb *); 54a091d823SDavid Xu 55a091d823SDavid Xu static __inline void 56a091d823SDavid Xu _tcb_set(struct tcb *tcb) 57a091d823SDavid Xu { 588e61dbecSMarcel Moolenaar register uint8_t *_tp __asm__("%r2"); 599f7b8b0dSMarcel Moolenaar 608e61dbecSMarcel Moolenaar __asm __volatile("mr %0,%1" : "=r"(_tp) : 618e61dbecSMarcel Moolenaar "r"((uint8_t *)tcb + TLS_TP_OFFSET)); 62a091d823SDavid Xu } 63a091d823SDavid Xu 64a091d823SDavid Xu static __inline struct tcb * 65a091d823SDavid Xu _tcb_get(void) 66a091d823SDavid Xu { 678e61dbecSMarcel Moolenaar register uint8_t *_tp __asm__("%r2"); 688e61dbecSMarcel Moolenaar 698e61dbecSMarcel Moolenaar return ((struct tcb *)(_tp - TLS_TP_OFFSET)); 70a091d823SDavid Xu } 71a091d823SDavid Xu 72a091d823SDavid Xu extern struct pthread *_thr_initial; 73a091d823SDavid Xu 74a091d823SDavid Xu static __inline struct pthread * 75a091d823SDavid Xu _get_curthread(void) 76a091d823SDavid Xu { 77a091d823SDavid Xu if (_thr_initial) 788e61dbecSMarcel Moolenaar return (_tcb_get()->tcb_thread); 79a091d823SDavid Xu return (NULL); 80a091d823SDavid Xu } 81a091d823SDavid Xu 82a091d823SDavid Xu #endif /* _PTHREAD_MD_H_ */ 83