pthread_md.h revision 1.6 
1/*	$NetBSD: pthread_md.h,v 1.6 2008/04/28 20:23:02 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/*
33 * Based on the i386 version.
34 */
35
36#ifndef _LIB_PTHREAD_M68K_MD_H
37#define _LIB_PTHREAD_M68K_MD_H
38
39
40static inline long
41pthread__sp(void)
42{
43	long ret;
44	__asm("movl %%sp, %0" : "=g" (ret));
45
46	return ret;
47}
48
49#define pthread__uc_sp(ucp) ((ucp)->uc_mcontext.__gregs[_REG_A7])
50#define pthread__uc_pc(ucp) ((ucp)->uc_mcontext.__gregs[_REG_PC])
51
52/*
53 * Usable stack space below the ucontext_t.
54 * See comment in pthread_switch.S about STACK_SWITCH.
55 */
56#define STACKSPACE	12	/* room for 3 integer values */
57
58/*
59 * Conversions between struct reg and struct mcontext. Used by
60 * libpthread_dbg.
61 */
62
63#define PTHREAD_UCONTEXT_TO_REG(reg, uc) do {				\
64	memcpy(&(reg)->r_regs, &(uc)->uc_mcontext.__gregs,		\
65		_REG_PC * sizeof(__greg_t));				\
66	(reg)->r_sr = (uc)->uc_mcontext.__gregs[_REG_PS];		\
67	(reg)->r_pc = (uc)->uc_mcontext.__gregs[_REG_PC];		\
68	} while (/*CONSTCOND*/0)
69
70#define PTHREAD_REG_TO_UCONTEXT(uc, reg) do {				\
71	memcpy(&(uc)->uc_mcontext.__gregs, &(reg)->r_regs,		\
72		_REG_PC * sizeof(__greg_t));				\
73	(uc)->uc_mcontext.__gregs[_REG_PS] = (reg)->r_sr;		\
74	(uc)->uc_mcontext.__gregs[_REG_PC] = (reg)->r_pc;		\
75	(uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER;       	\
76	} while (/*CONSTCOND*/0)
77
78#define PTHREAD_UCONTEXT_TO_FPREG(freg, uc) do {       			\
79	memcpy(&(freg)->r_regs, &(uc)->uc_mcontext.__fpregs.__fp_fpregs,\
80		8 * 3 * sizeof(int));					\
81	(freg)->r_fpcr = (uc)->uc_mcontext.__fpregs.__fp_pcr;		\
82	(freg)->r_fpsr = (uc)->uc_mcontext.__fpregs.__fp_psr;		\
83	(freg)->r_fpiar = (uc)->uc_mcontext.__fpregs.__fp_piaddr;      	\
84	} while (/*CONSTCOND*/0)
85
86#define PTHREAD_FPREG_TO_UCONTEXT(uc, freg) do {       	       		\
87	memcpy(&(uc)->uc_mcontext.__fpregs.__fp_fpregs, &(freg)->r_regs,\
88		8 * 3 * sizeof(int));					\
89	(uc)->uc_mcontext.__fpregs.__fp_pcr = (freg)->r_fpcr;		\
90	(uc)->uc_mcontext.__fpregs.__fp_psr = (freg)->r_fpsr;		\
91	(uc)->uc_mcontext.__fpregs.__fp_piaddr = (freg)->r_fpiar;      	\
92	(uc)->uc_flags = ((uc)->uc_flags | _UC_FPU) & ~_UC_USER;       	\
93	} while (/*CONSTCOND*/0)
94
95/* m68k will not go SMP */
96#define	PTHREAD__ATOMIC_IS_MEMBAR
97
98#endif /* _LIB_PTHREAD_M68K_MD_H */
99