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/* Pointer obfuscation implenentation. C-SKY version.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#ifndef POINTER_GUARD_H
#define POINTER_GUARD_H
#if (IS_IN (rtld) \
|| (!defined SHARED && (IS_IN (libc) || IS_IN (libpthread))))
# ifdef __ASSEMBLER__
# define PTR_MANGLE(dst, src, guard) \
grs t0, 1f; \
1: \
lrw guard, 1b@GOTPC; \
addu t0, guard; \
lrw guard, __pointer_chk_guard_local@GOT; \
ldr.w guard, (t0, guard << 0); \
ldw guard, (guard, 0); \
xor dst, src, guard;
# define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard)
# define PTR_MANGLE2(dst, src, guard) \
xor dst, src, guard
# define PTR_DEMANGLE2(dst, src, guard) PTR_MANGLE2 (dst, src, guard)
# else
extern uintptr_t __pointer_chk_guard_local;
# define PTR_MANGLE(var) \
(var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
# define PTR_DEMANGLE(var) PTR_MANGLE (var)
# endif
#else
# ifdef __ASSEMBLER__
# define PTR_MANGLE(dst, src, guard) \
grs t0, 1f; \
1: \
lrw guard, 1b@GOTPC; \
addu t0, guard; \
lrw guard, __pointer_chk_guard@GOT; \
ldr.w guard, (t0, guard << 0); \
ldw guard, (guard, 0); \
xor dst, src, guard;
# define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard)
# define PTR_MANGLE2(dst, src, guard) \
xor dst, src, guard
# define PTR_DEMANGLE2(dst, src, guard) PTR_MANGLE2 (dst, src, guard)
# else
# include <stdint.h>
extern uintptr_t __pointer_chk_guard;
# define PTR_MANGLE(var) \
(var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
# define PTR_DEMANGLE(var) PTR_MANGLE (var)
# endif
#endif
#endif /* POINTER_GUARD_H */
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