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/* _Unwind_Frames_Extra with shadow stack for x86-64 and x86.
Copyright (C) 2017-2019 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC 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 General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* NB: We need _get_ssp and _inc_ssp from <cetintrin.h>. But we can't
include <x86intrin.h> which ends up including <mm_malloc.h>, which
includes <stdlib.h> and <errno.h> unconditionally. But we can't
include any libc system headers unconditionally from libgcc. Avoid
including <mm_malloc.h> here by defining _IMMINTRIN_H_INCLUDED. */
#define _IMMINTRIN_H_INCLUDED
#include <cetintrin.h>
#undef _IMMINTRIN_H_INCLUDED
/* Unwind the shadow stack for EH. */
#undef _Unwind_Frames_Extra
#define _Unwind_Frames_Extra(x) \
do \
{ \
_Unwind_Word ssp = _get_ssp (); \
if (ssp != 0) \
{ \
_Unwind_Word tmp = (x); \
while (tmp > 255) \
{ \
_inc_ssp (255); \
tmp -= 255; \
} \
_inc_ssp (tmp); \
} \
} \
while (0)
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