minix/lib/libc/arch/sparc/gen/_lwp.c
Lionel Sambuc e415d48872 Libc update to simplify merge.
Bumping libc files for unsupported architectures, to simplify merging.
A bunch of small fixes:
 * in libutil update
 * the macro in endian.h
 * some undefined types due to clear separation from host.
 * Fix a warning for cdbr.c

Some modification which were required for the new build system:
 * inclusion path for const.h in sconst, still hacky
 * Removed default malloc.c which conflicts on some occasions.
2012-11-15 16:07:29 +01:00

74 lines
2.6 KiB
C

/* $NetBSD: _lwp.c,v 1.7 2012/03/21 00:34:04 christos Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: _lwp.c,v 1.7 2012/03/21 00:34:04 christos Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <sys/types.h>
#include <ucontext.h>
#include <lwp.h>
#include <stdlib.h>
void
_lwp_makecontext(ucontext_t *u, void (*start)(void *), void *arg,
void *private, caddr_t stack_base, size_t stack_size)
{
__greg_t *gr;
unsigned long *sp;
getcontext(u);
gr = u->uc_mcontext.__gregs;
u->uc_link = NULL;
u->uc_stack.ss_sp = stack_base;
u->uc_stack.ss_size = stack_size;
sp = (void *)(stack_base + stack_size);
sp = (ulong *)((ulong)sp & ~0x07);
/* Make room for the fake caller stack frame (CCFSZ, only in words) */
sp -= 8 + 8 + 1 + 6 + 1;
/* Entering (*start)(arg), return is to _lwp_exit */
gr[_REG_PC] = (ulong) start;
gr[_REG_nPC] = (ulong) start + 4;
gr[_REG_O0] = (ulong)arg;
gr[_REG_O6] = (ulong)sp;
gr[_REG_O7] = (ulong)_lwp_exit - 8;
gr[_REG_G7] = (ulong)private;
/* XXX: uwe: why do we need this? */
/* create loopback in the window save area on the stack? */
sp[8+6] = (ulong)sp; /* %i6 */
sp[8+7] = (ulong)_lwp_exit - 8; /* %i7 */
}