1 /*- 2 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>. 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 * 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 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 /* 30 * Machine-dependent thread prototypes/definitions. 31 */ 32 #ifndef _PTHREAD_MD_H_ 33 #define _PTHREAD_MD_H_ 34 35 #include <sys/types.h> 36 #include <machine/sysarch.h> 37 #include <stddef.h> 38 39 #define CPU_SPINWAIT 40 #define DTV_OFFSET offsetof(struct tcb, tcb_dtv) 41 42 /* 43 * Variant II tcb, first two members are required by rtld. 44 */ 45 struct tcb { 46 struct tcb *tcb_self; /* required by rtld */ 47 void *tcb_dtv; /* required by rtld */ 48 struct pthread *tcb_thread; /* our hook */ 49 void *tcb_spare[1]; 50 }; 51 52 /* 53 * The tcb constructors. 54 */ 55 struct tcb *_tcb_ctor(struct pthread *, int); 56 void _tcb_dtor(struct tcb *); 57 58 /* Called from the thread to set its private data. */ 59 static __inline void 60 _tcb_set(struct tcb *tcb) 61 { 62 *((struct tcb **)ARM_TP_ADDRESS) = tcb; 63 } 64 65 /* 66 * Get the current tcb. 67 */ 68 static __inline struct tcb * 69 _tcb_get(void) 70 { 71 return (*((struct tcb **)ARM_TP_ADDRESS)); 72 } 73 74 extern struct pthread *_thr_initial; 75 76 static __inline struct pthread * 77 _get_curthread(void) 78 { 79 if (_thr_initial) 80 return (_tcb_get()->tcb_thread); 81 return (NULL); 82 } 83 84 #endif /* _PTHREAD_MD_H_ */ 85