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pthread_md.h revision 1.4.12.1 
      1 /*	pthread_md.h,v 1.4 2005/12/24 21:11:17 perry 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _LIB_PTHREAD_VAX_MD_H
     40 #define _LIB_PTHREAD_VAX_MD_H
     41 
     42 static inline long
     43 pthread__sp(void)
     44 {
     45 	long ret;
     46 
     47 	__asm("movl %%sp,%0" : "=r" (ret));
     48 
     49 	return ret;
     50 }
     51 
     52 #define pthread__uc_sp(ucp) ((ucp)->uc_mcontext.__gregs[_REG_SP])
     53 #define pthread__uc_pc(ucp) ((ucp)->uc_mcontext.__gregs[_REG_PC])
     54 
     55 /*
     56  * Set initial, sane values for registers whose values aren't just
     57  * "don't care".
     58  * 0x03c00000 is PSL_U|PSL_PREVU from arch/vax/include/psl.h
     59  */
     60 #define _INITCONTEXT_U_MD(ucp)						\
     61 	(ucp)->uc_mcontext.__gregs[_REG_PSL] = 0x03c00000;
     62 
     63 #define	STACKSPACE	0
     64 /*
     65  * Conversions between struct reg and struct mcontext. Used by
     66  * libpthread_dbg.
     67  */
     68 
     69 #define PTHREAD_UCONTEXT_TO_REG(reg, uc) do {				\
     70 	memcpy((reg), &(uc)->uc_mcontext.__gregs, 17 * sizeof(__greg_t)); \
     71 	(reg)->fp = (uc)->uc_mcontext.__gregs[_REG_FP];			\
     72 	(reg)->sp = (uc)->uc_mcontext.__gregs[_REG_SP];			\
     73 	} while (/*CONSTCOND*/0)
     74 
     75 #define PTHREAD_REG_TO_UCONTEXT(uc, reg) do {				\
     76 	memcpy(&(uc)->uc_mcontext.__gregs, (reg), 17 * sizeof(__greg_t)); \
     77 	(uc)->uc_mcontext.__gregs[_REG_FP] = (reg)->fp;			\
     78 	(uc)->uc_mcontext.__gregs[_REG_SP] = (reg)->sp;			\
     79 	(uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER;       	\
     80 	} while (/*CONSTCOND*/0)
     81 
     82 #define PTHREAD_UCONTEXT_TO_FPREG(reg, uc) do {				\
     83 	} while (/*CONSTCOND*/0)
     84 
     85 #define PTHREAD_FPREG_TO_UCONTEXT(uc, reg) do {				\
     86 	} while (/*CONSTCOND*/0)
     87 
     88 /* Don't need additional memory barriers. */
     89 #define	PTHREAD__ATOMIC_IS_MEMBAR
     90 
     91 #endif /* _LIB_PTHREAD_VAX_MD_H */
     92