Branch data Line data Source code
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 : : * Copyright (c) 2015-2017 The strace developers.
9 : : * All rights reserved.
10 : : *
11 : : * Redistribution and use in source and binary forms, with or without
12 : : * modification, are permitted provided that the following conditions
13 : : * are met:
14 : : * 1. Redistributions of source code must retain the above copyright
15 : : * notice, this list of conditions and the following disclaimer.
16 : : * 2. Redistributions in binary form must reproduce the above copyright
17 : : * notice, this list of conditions and the following disclaimer in the
18 : : * documentation and/or other materials provided with the distribution.
19 : : * 3. The name of the author may not be used to endorse or promote products
20 : : * derived from this software without specific prior written permission.
21 : : *
22 : : * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 : : * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 : : * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 : : * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 : : * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 : : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 : : * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 : : * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 : : * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 : : * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 : : */
33 : :
34 : : #include "defs.h"
35 : :
36 : : #include DEF_MPERS_TYPE(stack_t)
37 : :
38 : : #include <signal.h>
39 : :
40 : : #include MPERS_DEFS
41 : :
42 : : #include "xlat/sigaltstack_flags.h"
43 : :
44 : : static void
45 : 4 : print_stack_t(struct tcb *const tcp, const kernel_ulong_t addr)
46 : : {
47 : : stack_t ss;
48 : :
49 [ + + ]: 4 : if (umove_or_printaddr(tcp, addr, &ss))
50 : 2 : return;
51 : :
52 : 2 : tprints("{ss_sp=");
53 : 2 : printaddr(ptr_to_kulong(ss.ss_sp));
54 : 2 : tprints(", ss_flags=");
55 : 2 : printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
56 : 2 : tprintf(", ss_size=%" PRI_klu "}", (kernel_ulong_t) ss.ss_size);
57 : : }
58 : :
59 : 4 : SYS_FUNC(sigaltstack)
60 : : {
61 [ + + ]: 4 : if (entering(tcp)) {
62 : 2 : print_stack_t(tcp, tcp->u_arg[0]);
63 : 2 : tprints(", ");
64 : : } else {
65 : 2 : print_stack_t(tcp, tcp->u_arg[1]);
66 : : }
67 : 4 : return 0;
68 : : }
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