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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 The FreeBSD Foundation
*
* This software was developed by Mark Johnston under sponsorship from the
* FreeBSD Foundation.
*
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#ifndef _MACHINE_ASAN_H_
#define _MACHINE_ASAN_H_
#ifdef KASAN
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_page.h>
#include <machine/vmparam.h>
static inline vm_offset_t
kasan_md_addr_to_shad(vm_offset_t addr)
{
return (((addr - VM_MIN_KERNEL_ADDRESS) >> KASAN_SHADOW_SCALE_SHIFT) +
KASAN_MIN_ADDRESS);
}
static inline bool
kasan_md_unsupported(vm_offset_t addr)
{
vm_offset_t kernmin;
/*
* The vm_page array is mapped at the beginning of the kernel map, but
* accesses to the array are not validated for now. Handle the fact
* that KASAN must validate accesses before the vm_page array is
* initialized.
*/
kernmin = vm_page_array == NULL ? VM_MIN_KERNEL_ADDRESS :
(vm_offset_t)(vm_page_array + vm_page_array_size);
return (addr < kernmin || addr >= VM_MAX_KERNEL_ADDRESS);
}
static inline void
kasan_md_init(void)
{
}
#endif /* KASAN */
#endif /* !_MACHINE_ASAN_H_ */
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