diff options
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/generic/____longjmp_chk.c')
-rw-r--r-- | ports/sysdeps/unix/sysv/linux/generic/____longjmp_chk.c | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/generic/____longjmp_chk.c b/ports/sysdeps/unix/sysv/linux/generic/____longjmp_chk.c deleted file mode 100644 index 579cf3998f..0000000000 --- a/ports/sysdeps/unix/sysv/linux/generic/____longjmp_chk.c +++ /dev/null @@ -1,57 +0,0 @@ -/* Copyright (C) 2011-2014 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library. If not, see - <http://www.gnu.org/licenses/>. */ - -#include <jmpbuf-offsets.h> -#include <sysdep.h> -#include <setjmp.h> -#include <signal.h> -#include <stdio.h> -#include <stackinfo.h> - -#ifdef _STACK_GROWS_DOWN -#define called_from(this, saved) ((this) < (saved)) -#else -#define called_from(this, saved) ((this) > (saved)) -#endif - -extern void ____longjmp_chk (__jmp_buf __env, int __val) - __attribute__ ((__noreturn__)); - -void ____longjmp_chk (__jmp_buf env, int val) -{ - void *this_frame = __builtin_frame_address (0); - void *saved_frame = JB_FRAME_ADDRESS (env); - INTERNAL_SYSCALL_DECL (err); - stack_t ss; - - /* If "env" is from a frame that called us, we're all set. */ - if (called_from(this_frame, saved_frame)) - __longjmp (env, val); - - /* If we can't get the current stack state, give up and do the longjmp. */ - if (INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &ss) != 0) - __longjmp (env, val); - - /* If we we are executing on the alternate stack and within the - bounds, do the longjmp. */ - if (ss.ss_flags == SS_ONSTACK && - (this_frame >= ss.ss_sp && this_frame < (ss.ss_sp + ss.ss_size))) - __longjmp (env, val); - - __fortify_fail ("longjmp causes uninitialized stack frame"); -} |