diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-32/____longjmp_chk.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-32/____longjmp_chk.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/____longjmp_chk.c b/sysdeps/unix/sysv/linux/s390/s390-32/____longjmp_chk.c new file mode 100644 index 0000000000..b28e587498 --- /dev/null +++ b/sysdeps/unix/sysv/linux/s390/s390-32/____longjmp_chk.c @@ -0,0 +1,55 @@ +/* Copyright (C) 2009 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek <jakub@redhat.com>. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <errno.h> +#include <sysdep.h> +#include <setjmp.h> +#include <bits/setjmp.h> +#include <stdlib.h> +#include <unistd.h> +#include <stdio.h> +#include <stdint.h> +#include <signal.h> +#include <sys/syscall.h> + +#define __longjmp ____longjmp_chk + +#define CHECK_SP(env, guard) \ + do \ + { \ + uintptr_t cur_sp; \ + uintptr_t new_sp = env->__gregs[9]; \ + __asm ("lr %0, %%r15" : "=r" (cur_sp)); \ + new_sp ^= guard; \ + if (new_sp < cur_sp) \ + { \ + stack_t oss; \ + INTERNAL_SYSCALL_DECL (err); \ + int res = INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &oss); \ + if (!INTERNAL_SYSCALL_ERROR_P (res, err)) \ + { \ + if ((oss.ss_flags & SS_ONSTACK) == 0 \ + || ((uintptr_t) (oss.ss_sp + oss.ss_size) - new_sp \ + >= oss.ss_size)) \ + __fortify_fail ("longjmp causes uninitialized stack frame");\ + } \ + } \ + } while (0) + +#include "__longjmp.c" |