b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
/* $NetBSD: _lwp.c,v 1.1 2009/06/03 01:02:28 christos Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2009 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Christos Zoulas
|
|
*
|
|
* 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 1.1 2009/06/03 01:02:28 christos Exp $");
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include "namespace.h"
|
|
#include <sys/types.h>
|
|
#include <inttypes.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 = u->uc_mcontext.__gregs;
|
|
int *sp;
|
|
|
|
getcontext(u);
|
|
u->uc_link = NULL;
|
|
|
|
u->uc_stack.ss_sp = stack_base;
|
|
u->uc_stack.ss_size = stack_size;
|
|
|
|
/* Align to a word */
|
|
/* LINTED uintptr_t is safe */
|
|
sp = (int *)((uintptr_t)(stack_base + stack_size) & ~0x3);
|
|
|
|
/*
|
|
* Allocate necessary stack space for arguments including arg count
|
|
* and call frame
|
|
*/
|
|
sp -= 1 + 1 + 5;
|
|
|
|
sp[0] = 0; /* condition handler is null */
|
|
sp[1] = 0x20000000; /* make this a CALLS frame */
|
|
sp[2] = 0; /* saved argument pointer */
|
|
sp[3] = 0; /* saved frame pointer */
|
|
sp[4] = (intptr_t)_lwp_exit + 2;/* return via _lwp_exit */
|
|
sp[5] = 1; /* argc */
|
|
sp[6] = (intptr_t)arg; /* argv */
|
|
|
|
gr[_REG_AP] = (__greg_t)(sp + 5);
|
|
gr[_REG_SP] = (__greg_t)sp;
|
|
gr[_REG_FP] = (__greg_t)sp;
|
|
gr[_REG_PC] = (__greg_t)start + 2;
|
|
}
|