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/* Copyright (C) 2009-2014 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, see
<http://www.gnu.org/licenses/>. */
#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>
#include <libc-symbols.h>
#include <shlib-compat.h>
#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) \
{ \
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)
#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 */
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