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pthread_md.h revision 1.6.8.2 
      1 /*	$NetBSD: pthread_md.h,v 1.6.8.2 2008/04/28 20:23:03 martin Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Nathan J. Williams.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _LIB_PTHREAD_VAX_MD_H
     33 #define _LIB_PTHREAD_VAX_MD_H
     34 
     35 static inline long
     36 pthread__sp(void)
     37 {
     38 	long ret;
     39 
     40 	__asm("movl %%sp,%0" : "=r" (ret));
     41 
     42 	return ret;
     43 }
     44 
     45 #define pthread__uc_sp(ucp) ((ucp)->uc_mcontext.__gregs[_REG_SP])
     46 #define pthread__uc_pc(ucp) ((ucp)->uc_mcontext.__gregs[_REG_PC])
     47 
     48 /*
     49  * Set initial, sane values for registers whose values aren't just
     50  * "don't care".
     51  * 0x03c00000 is PSL_U|PSL_PREVU from arch/vax/include/psl.h
     52  */
     53 #define _INITCONTEXT_U_MD(ucp)						\
     54 	(ucp)->uc_mcontext.__gregs[_REG_PSL] = 0x03c00000;
     55 
     56 #define	STACKSPACE	0
     57 /*
     58  * Conversions between struct reg and struct mcontext. Used by
     59  * libpthread_dbg.
     60  */
     61 
     62 #define PTHREAD_UCONTEXT_TO_REG(reg, uc) do {				\
     63 	memcpy((reg), &(uc)->uc_mcontext.__gregs, 17 * sizeof(__greg_t)); \
     64 	(reg)->fp = (uc)->uc_mcontext.__gregs[_REG_FP];			\
     65 	(reg)->sp = (uc)->uc_mcontext.__gregs[_REG_SP];			\
     66 	} while (/*CONSTCOND*/0)
     67 
     68 #define PTHREAD_REG_TO_UCONTEXT(uc, reg) do {				\
     69 	memcpy(&(uc)->uc_mcontext.__gregs, (reg), 17 * sizeof(__greg_t)); \
     70 	(uc)->uc_mcontext.__gregs[_REG_FP] = (reg)->fp;			\
     71 	(uc)->uc_mcontext.__gregs[_REG_SP] = (reg)->sp;			\
     72 	(uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER;       	\
     73 	} while (/*CONSTCOND*/0)
     74 
     75 #define PTHREAD_UCONTEXT_TO_FPREG(reg, uc) do {				\
     76 	} while (/*CONSTCOND*/0)
     77 
     78 #define PTHREAD_FPREG_TO_UCONTEXT(uc, reg) do {				\
     79 	} while (/*CONSTCOND*/0)
     80 
     81 /* Don't need additional memory barriers. */
     82 #define	PTHREAD__ATOMIC_IS_MEMBAR
     83 
     84 #endif /* _LIB_PTHREAD_VAX_MD_H */
     85