1/* Copyright (C) 2003-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Jakub Jelinek <jakub@redhat.com>.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, see <http://www.gnu.org/licenses/>. */
18
19#include <dlfcn.h>
20#include <stdio.h>
21#include <unwind.h>
22#include <gnu/lib-names.h>
23#include <sysdep.h>
24#include <unwind-resume.h>
25
26
27void (*__libgcc_s_resume) (struct _Unwind_Exception *exc)
28 attribute_hidden __attribute__ ((noreturn));
29
30static _Unwind_Reason_Code (*libgcc_s_personality) PERSONALITY_PROTO;
31
32void attribute_hidden __attribute__ ((cold))
33__libgcc_s_init (void)
34{
35 void *resume, *personality;
36 void *handle;
37
38 handle = __libc_dlopen (LIBGCC_S_SO);
39
40 if (handle == NULL
41 || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL
42 || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL)
43 __libc_fatal (LIBGCC_S_SO
44 " must be installed for pthread_cancel to work\n");
45
46#ifdef PTR_MANGLE
47 PTR_MANGLE (resume);
48#endif
49 __libgcc_s_resume = resume;
50#ifdef PTR_MANGLE
51 PTR_MANGLE (personality);
52#endif
53 libgcc_s_personality = personality;
54}
55
56#if !HAVE_ARCH_UNWIND_RESUME
57void
58_Unwind_Resume (struct _Unwind_Exception *exc)
59{
60 if (__glibc_unlikely (__libgcc_s_resume == NULL))
61 __libgcc_s_init ();
62
63 __typeof (__libgcc_s_resume) resume = __libgcc_s_resume;
64#ifdef PTR_DEMANGLE
65 PTR_DEMANGLE (resume);
66#endif
67 (*resume) (exc);
68}
69#endif
70
71_Unwind_Reason_Code
72__gcc_personality_v0 PERSONALITY_PROTO
73{
74 if (__glibc_unlikely (libgcc_s_personality == NULL))
75 __libgcc_s_init ();
76
77 __typeof (libgcc_s_personality) personality = libgcc_s_personality;
78#ifdef PTR_DEMANGLE
79 PTR_DEMANGLE (personality);
80#endif
81 return (*personality) PERSONALITY_ARGS;
82}
83