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+/* $NetBSD: asan.h,v 1.15 2020/09/10 14:10:46 maxv Exp $ */
+
+/*
+ * Copyright (c) 2018-2020 Maxime Villard, m00nbsd.net
+ * All rights reserved.
+ *
+ * This code is part of the KASAN subsystem of the NetBSD kernel.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_ASAN_H_
+#define _SYS_ASAN_H_
+
+#ifdef KASAN
+#include <sys/types.h>
+
+/* ASAN constants. Part of the compiler ABI. */
+#define KASAN_SHADOW_SCALE 8
+#define KASAN_SHADOW_SCALE_SHIFT 3
+
+/* Stack redzone values. Part of the compiler ABI. */
+#define KASAN_STACK_LEFT 0xF1
+#define KASAN_STACK_MID 0xF2
+#define KASAN_STACK_RIGHT 0xF3
+#define KASAN_USE_AFTER_RET 0xF5
+#define KASAN_USE_AFTER_SCOPE 0xF8
+
+/* Our redzone values. */
+#define KASAN_GENERIC_REDZONE 0xFA
+#define KASAN_MALLOC_REDZONE 0xFB
+#define KASAN_KMEM_REDZONE 0xFC
+#define KASAN_UMA_FREED 0xFD
+#define KASAN_KSTACK_FREED 0xFE
+
+void kasan_init(void);
+void kasan_shadow_map(void *, size_t);
+
+void kasan_mark(const void *, size_t, size_t, uint8_t);
+#else /* KASAN */
+#define kasan_early_init(u)
+#define kasan_init()
+#define kasan_shadow_map(a, s)
+#define kasan_mark(p, s, l, c)
+#endif /* !KASAN */
+
+#endif /* !_SYS_ASAN_H_ */