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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/param.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/proc.h>
#include <sys/fault.h>
#include <sys/signal.h>
#include <sys/siginfo.h>
#include <sys/debug.h>
int
sigaltstack(struct sigaltstack *ssp, struct sigaltstack *oss)
{
klwp_t *lwp = ttolwp(curthread);
struct sigaltstack ss;
/*
* User's oss and ss might be the same address, so copyin first and
* save before copying out.
*/
if (ssp) {
if (lwp->lwp_sigaltstack.ss_flags & SS_ONSTACK)
return (set_errno(EPERM));
if (copyin(ssp, &ss, sizeof (ss)))
return (set_errno(EFAULT));
if (ss.ss_flags & ~SS_DISABLE)
return (set_errno(EINVAL));
if (!(ss.ss_flags & SS_DISABLE) && ss.ss_size < MINSIGSTKSZ)
return (set_errno(ENOMEM));
}
if (oss) {
if (copyout(&lwp->lwp_sigaltstack,
oss, sizeof (struct sigaltstack)))
return (set_errno(EFAULT));
}
if (ssp)
lwp->lwp_sigaltstack = ss;
return (0);
}
#ifdef _LP64
int
sigaltstack32(struct sigaltstack32 *ssp, struct sigaltstack32 *oss)
{
klwp_t *lwp = ttolwp(curthread);
struct sigaltstack *ss;
struct sigaltstack32 ss32, oss32;
/*
* User's oss and ss might be the same address, so copyin first and
* save before copying out.
*/
if (ssp) {
if (lwp->lwp_sigaltstack.ss_flags & SS_ONSTACK)
return (set_errno(EPERM));
if (copyin(ssp, &ss32, sizeof (ss32)))
return (set_errno(EFAULT));
if (ss32.ss_flags & ~SS_DISABLE)
return (set_errno(EINVAL));
if (!(ss32.ss_flags & SS_DISABLE) && ss32.ss_size < MINSIGSTKSZ)
return (set_errno(ENOMEM));
}
if (oss) {
/*
* copy to ILP32 struct before copyout.
*/
ss = &lwp->lwp_sigaltstack;
oss32.ss_sp = (caddr32_t)(uintptr_t)ss->ss_sp;
oss32.ss_size = (size32_t)ss->ss_size;
oss32.ss_flags = ss->ss_flags;
if (copyout(&oss32, oss, sizeof (oss32)))
return (set_errno(EFAULT));
}
if (ssp) {
ss = &lwp->lwp_sigaltstack;
ss->ss_sp = (void *)(uintptr_t)ss32.ss_sp;
ss->ss_size = (size_t)ss32.ss_size;
ss->ss_flags = ss32.ss_flags;
}
return (0);
}
#endif /* _LP64 */
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