Warning: That file was not part of the compilation database. It may have many parsing errors.

1/* Copyright (C) 2011-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
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
7 License as published by the Free Software Foundation; either
8 version 2.1 of the 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. If not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <jmpbuf-offsets.h>
20#include <sysdep.h>
21#include <setjmp.h>
22#include <signal.h>
23#include <stdio.h>
24#include <stackinfo.h>
25
26#ifdef _STACK_GROWS_DOWN
27#define called_from(this, saved) ((this) < (saved))
28#else
29#define called_from(this, saved) ((this) > (saved))
30#endif
31
32extern void ____longjmp_chk (__jmp_buf __env, int __val)
33 __attribute__ ((__noreturn__));
34
35void ____longjmp_chk (__jmp_buf env, int val)
36{
37 void *this_frame = __builtin_frame_address (0);
38 void *saved_frame = JB_FRAME_ADDRESS (env);
39 INTERNAL_SYSCALL_DECL (err);
40 stack_t ss;
41
42 /* If "env" is from a frame that called us, we're all set. */
43 if (called_from(this_frame, saved_frame))
44 __longjmp (env, val);
45
46 /* If we can't get the current stack state, give up and do the longjmp. */
47 if (INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &ss) != 0)
48 __longjmp (env, val);
49
50 /* If we we are executing on the alternate stack and within the
51 bounds, do the longjmp. */
52 if (ss.ss_flags == SS_ONSTACK
53 && (this_frame >= ss.ss_sp && this_frame < (ss.ss_sp + ss.ss_size)))
54 __longjmp (env, val);
55
56 __fortify_fail ("longjmp causes uninitialized stack frame");
57}
58

Warning: That file was not part of the compilation database. It may have many parsing errors.