2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2020 The FreeBSD Foundation
6 * This software was developed by Mark Johnston under sponsorship from the
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #ifndef _MACHINE_ASAN_H_
32 #define _MACHINE_ASAN_H_
38 #include <vm/vm_page.h>
39 #include <machine/vmparam.h>
41 static inline vm_offset_t
42 kasan_md_addr_to_shad(vm_offset_t addr)
44 return (((addr - VM_MIN_KERNEL_ADDRESS) >> KASAN_SHADOW_SCALE_SHIFT) +
49 kasan_md_unsupported(vm_offset_t addr)
54 * The vm_page array is mapped at the beginning of the kernel map, but
55 * accesses to the array are not validated for now. Handle the fact
56 * that KASAN must validate accesses before the vm_page array is
59 kernmin = vm_page_array == NULL ? VM_MIN_KERNEL_ADDRESS :
60 (vm_offset_t)(vm_page_array + vm_page_array_size);
61 return (addr < kernmin || addr >= VM_MAX_KERNEL_ADDRESS);
70 kasan_md_init_early(vm_offset_t bootstack, size_t size)
72 kasan_shadow_map(bootstack, size);
77 #endif /* !_MACHINE_ASAN_H_ */