89c52f9d59
This entails: - Marking some obvious candidates for __nosanitizeaddress - Similar trap frame markings as amd64, for similar reasons - Shadow map implementation The shadow map implementation is roughly similar to what was done on amd64, with some exceptions. Attempting to use available space at preinit_map_va + PMAP_PREINIT_MAPPING_SIZE (up to the end of that range, as depicted in the physmap) results in odd failures, so we instead search the physmap for free regions that we can carve out, fragmenting the shadow map as necessary to try and fit as much as we need for the initial kernel map. pmap_bootstrap_san() is thus after pmap_bootstrap(), which still included some technically reserved areas of the memory map that needed to be included in the DMAP. The odd failure noted above may be a bug, but I haven't investigated it all that much. Initial work by mhorne with additional fixes from kevans and markj. Reviewed by: andrew, markj Sponsored by: Juniper Networks, Inc. Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D36701
69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2020 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_ASAN_H_
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#define _MACHINE_ASAN_H_
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#ifdef KASAN
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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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static inline vm_offset_t
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kasan_md_addr_to_shad(vm_offset_t addr)
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{
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return (((addr - VM_MIN_KERNEL_ADDRESS) >> KASAN_SHADOW_SCALE_SHIFT) +
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KASAN_MIN_ADDRESS);
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}
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static inline bool
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kasan_md_unsupported(vm_offset_t addr)
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{
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return (addr < VM_MIN_KERNEL_ADDRESS || addr >= virtual_end);
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}
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static inline void
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kasan_md_init(void)
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{
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}
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static inline void
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kasan_md_init_early(vm_offset_t bootstack, size_t size)
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{
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kasan_shadow_map(bootstack, size);
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}
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#endif /* KASAN */
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#endif /* !_MACHINE_ASAN_H_ */
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