2014-01-01 21:03:15 +10:00
|
|
|
/* Copyright (C) 2009-2014 Free Software Foundation, Inc.
|
2009-05-29 11:58:04 -07:00
|
|
|
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
|
2012-02-09 23:18:22 +00:00
|
|
|
License along with the GNU C Library; if not, see
|
|
|
|
|
<http://www.gnu.org/licenses/>. */
|
2009-05-29 11:58:04 -07:00
|
|
|
|
|
|
|
|
#include <errno.h>
|
|
|
|
|
#include <sysdep.h>
|
|
|
|
|
#include <setjmp.h>
|
|
|
|
|
#include <bits/setjmp.h>
|
|
|
|
|
#include <stdlib.h>
|
|
|
|
|
#include <unistd.h>
|
|
|
|
|
#include <stdio.h>
|
2009-09-08 16:00:25 -07:00
|
|
|
#include <stdint.h>
|
|
|
|
|
#include <signal.h>
|
|
|
|
|
#include <sys/syscall.h>
|
2014-01-07 09:36:31 +01:00
|
|
|
#include <libc-symbols.h>
|
|
|
|
|
#include <shlib-compat.h>
|
2009-05-29 11:58:04 -07:00
|
|
|
|
|
|
|
|
#define CHECK_SP(env, guard) \
|
|
|
|
|
do \
|
|
|
|
|
{ \
|
|
|
|
|
uintptr_t cur_sp; \
|
|
|
|
|
uintptr_t new_sp = env->__gregs[9]; \
|
|
|
|
|
__asm ("lgr %0, %%r15" : "=r" (cur_sp)); \
|
|
|
|
|
new_sp ^= guard; \
|
|
|
|
|
if (new_sp < cur_sp) \
|
2009-09-08 16:00:25 -07:00
|
|
|
{ \
|
|
|
|
|
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 \
|
2010-01-20 07:59:30 -08:00
|
|
|
< oss.ss_size)) \
|
2009-09-08 16:00:25 -07:00
|
|
|
__fortify_fail ("longjmp causes uninitialized stack frame");\
|
|
|
|
|
} \
|
|
|
|
|
} \
|
2009-05-29 11:58:04 -07:00
|
|
|
} while (0)
|
|
|
|
|
|
2014-01-07 09:36:31 +01:00
|
|
|
|
|
|
|
|
#if defined NOT_IN_libc
|
|
|
|
|
/* Build a non-versioned object for rtld-*. */
|
|
|
|
|
# define __longjmp ____longjmp_chk
|
|
|
|
|
# include "__longjmp-common.c"
|
|
|
|
|
|
|
|
|
|
#else /* !NOT_IN_libc */
|
|
|
|
|
# define __longjmp ____v2__longjmp_chk
|
|
|
|
|
# include "__longjmp-common.c"
|
|
|
|
|
# undef __longjmp
|
|
|
|
|
|
|
|
|
|
# if defined SHARED && SHLIB_COMPAT (libc, GLIBC_2_11, GLIBC_2_19)
|
|
|
|
|
# undef __longjmp
|
|
|
|
|
# define __V1_JMPBUF
|
|
|
|
|
# define __longjmp ____v1__longjmp_chk
|
|
|
|
|
# include "__longjmp-common.c"
|
|
|
|
|
# undef __longjmp
|
|
|
|
|
|
|
|
|
|
# endif
|
|
|
|
|
#endif /* !NOT_IN_libc */
|
