mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
69 lines
2.8 KiB
C
69 lines
2.8 KiB
C
/* Pointer obfuscation implenentation. C-SKY version.
|
|
Copyright (C) 2022-2025 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 */
|