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6e64bc845f
osreldate.h and sys/param.h were manually adjusted to not __FreeBSD_version since it will be defined by the compiler.
91 lines
No EOL
2.9 KiB
C
Vendored
91 lines
No EOL
2.9 KiB
C
Vendored
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 The FreeBSD Foundation
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*
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* This software was developed by Mark Johnston under sponsorship from the
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* FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _MACHINE_MSAN_H_
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#define _MACHINE_MSAN_H_
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#ifdef KMSAN
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_page.h>
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#include <machine/vmparam.h>
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typedef uint32_t msan_orig_t;
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/*
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* Our 32-bit origin cells encode a 2-bit type and 30-bit pointer to a kernel
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* instruction. The pointer is compressed by making it a positive offset
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* relative to KERNBASE.
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*/
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#define KMSAN_ORIG_TYPE_SHIFT 30u
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#define KMSAN_ORIG_PTR_MASK ((1u << KMSAN_ORIG_TYPE_SHIFT) - 1)
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static inline msan_orig_t
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kmsan_md_orig_encode(int type, uintptr_t ptr)
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{
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return ((type << KMSAN_ORIG_TYPE_SHIFT) |
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((ptr & KMSAN_ORIG_PTR_MASK)));
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}
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static inline void
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kmsan_md_orig_decode(msan_orig_t orig, int *type, uintptr_t *ptr)
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{
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*type = orig >> KMSAN_ORIG_TYPE_SHIFT;
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*ptr = (orig & KMSAN_ORIG_PTR_MASK) | KERNBASE;
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}
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static inline vm_offset_t
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kmsan_md_addr_to_shad(vm_offset_t addr)
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{
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return (addr - VM_MIN_KERNEL_ADDRESS + KMSAN_SHAD_MIN_ADDRESS);
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}
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static inline vm_offset_t
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kmsan_md_addr_to_orig(vm_offset_t addr)
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{
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return (addr - VM_MIN_KERNEL_ADDRESS + KMSAN_ORIG_MIN_ADDRESS);
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}
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static inline bool
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kmsan_md_unsupported(vm_offset_t addr)
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{
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/*
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* The kernel itself isn't shadowed: for most purposes global variables
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* are always initialized, and because KMSAN kernels are large
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* (GENERIC-KMSAN is ~80MB at the time of writing), shadowing would
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* incur signficant memory usage.
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*/
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return (addr < VM_MIN_KERNEL_ADDRESS || addr >= KERNBASE);
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}
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#endif /* KMSAN */
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#endif /* !_MACHINE_MSAN_H_ */ |