1 files changed, 43 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sh/pointer_guard.h b/sysdeps/unix/sysv/linux/sh/pointer_guard.h
new file mode 100644
index 0000000..32a571d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sh/pointer_guard.h
@@ -0,0 +1,43 @@
+/* Pointer obfuscation implenentation.  Generic (no-op) version.
+   Copyright (C) 2005-2022 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)
+/* We cannot use the thread descriptor because in ld.so we use setjmp
+   earlier than the descriptor is initialized.  Using a global variable
+   is too complicated here since we have no PC-relative addressing mode.  */
+# include <sysdeps/generic/pointer_guard.h>
+#else
+# ifdef __ASSEMBLER__
+#  define PTR_MANGLE(reg, tmp) \
+     stc gbr,tmp; mov.l @(POINTER_GUARD,tmp),tmp; xor tmp,reg
+#  define PTR_MANGLE2(reg, tmp) xor tmp,reg
+#  define PTR_DEMANGLE(reg, tmp)        PTR_MANGLE (reg, tmp)
+#  define PTR_DEMANGLE2(reg, tmp)       PTR_MANGLE2 (reg, tmp)
+# else
+#  include <stdint.h>
+#  include <tls.h>
+#  define PTR_MANGLE(var) \
+     (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
+#  define PTR_DEMANGLE(var)     PTR_MANGLE (var)
+# endif
+#endif
+
+#endif /* POINTER_GUARD_H */