pthread_md.h revision 1.3 
1/*	$NetBSD: pthread_md.h,v 1.3 2005/12/24 21:11:16 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_ALPHA_MD_H
40#define _LIB_PTHREAD_ALPHA_MD_H
41
42static inline long
43pthread__sp(void)
44{
45	long ret;
46
47	__asm("mov $30, %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 * 0x0008 is ALPHA_PSL_USERSET from arch/alpha/include/alpha_cpu.h
59 */
60#define _INITCONTEXT_U_MD(ucp)						\
61	(ucp)->uc_mcontext.__gregs[_REG_PS] = 0x0008;
62#define STACKSPACE 32	/* 4 quad values */
63/*
64 * Conversions between struct reg and struct mcontext. Used by
65 * libpthread_dbg.
66 */
67
68#define PTHREAD_UCONTEXT_TO_REG(reg, uc) do {				\
69	memcpy(&(reg)->r_regs, &(uc)->uc_mcontext.__gregs,		\
70		31 * sizeof(__greg_t));					\
71	(reg)->r_regs[R_ZERO] = (uc)->uc_mcontext.__gregs[_REG_PC];    	\
72	} while (/*CONSTCOND*/0)
73
74#define PTHREAD_REG_TO_UCONTEXT(uc, reg) do {				\
75	memcpy(&(uc)->uc_mcontext.__gregs, &(reg)->r_regs,		\
76		31 * sizeof(__greg_t));					\
77	(uc)->uc_mcontext.__gregs[_REG_PC] = (reg)->r_regs[R_ZERO];    	\
78	(uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER;       	\
79	} while (/*CONSTCOND*/0)
80
81#define PTHREAD_UCONTEXT_TO_FPREG(freg, uc)       			\
82	memcpy((freg), &(uc)->uc_mcontext.__fpregs,			\
83	    sizeof(struct fpreg))					\
84
85#define PTHREAD_FPREG_TO_UCONTEXT(uc, freg) do {       	       		\
86	memcpy(&(uc)->uc_mcontext.__fpregs, (freg),			\
87	    sizeof(struct fpreg));					\
88	(uc)->uc_flags = ((uc)->uc_flags | _UC_FPU) & ~_UC_USER;       	\
89	} while (/*CONSTCOND*/0)
90
91#endif /* _LIB_PTHREAD_ALPHA_MD_H */
92