1/*
2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
7 * Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
8 * All rights reserved.
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. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include "defs.h"
34
35#include DEF_MPERS_TYPE(stack_t)
36
37#include <signal.h>
38
39#include MPERS_DEFS
40
41#include "xlat/sigaltstack_flags.h"
42
43static void
44print_stack_t(struct tcb *tcp, unsigned long addr)
45{
46	stack_t ss;
47
48	if (umove_or_printaddr(tcp, addr, &ss))
49		return;
50
51	tprints("{ss_sp=");
52	printaddr((unsigned long) ss.ss_sp);
53	tprints(", ss_flags=");
54	printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
55	tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
56}
57
58SYS_FUNC(sigaltstack)
59{
60	if (entering(tcp)) {
61		print_stack_t(tcp, tcp->u_arg[0]);
62		tprints(", ");
63	} else {
64		print_stack_t(tcp, tcp->u_arg[1]);
65	}
66	return 0;
67}
68