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4c6c27d3fb
To allow for Hardware-assisted AddressSanitizer (HWASAN) and future work to enable MTE we need to enable TBI in userspace. As address space that previously would have faulted will now not it could be considered an ABI change so only enable for processes with a late enough revision. Relnotes: yes Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D51637
89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/*-
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* Copyright (c) 1991 Regents of the University of California.
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* All rights reserved.
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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
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* are 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 the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* from: FreeBSD: src/sys/i386/include/proc.h,v 1.11 2001/06/29
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*/
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#ifdef __arm__
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#include <arm/proc.h>
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#else /* !__arm__ */
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#ifndef _MACHINE_PROC_H_
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#define _MACHINE_PROC_H_
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#ifndef LOCORE
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struct ptrauth_key {
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uint64_t pa_key_lo;
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uint64_t pa_key_hi;
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};
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struct mdthread {
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int md_spinlock_count; /* (k) */
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register_t md_saved_daif; /* (k) */
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uintptr_t md_canary;
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/*
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* The pointer authentication keys. These are shared within a process,
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* however this may change for some keys as the PAuth ABI Extension to
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* ELF for the Arm 64-bit Architecture [1] is currently (July 2021) at
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* an Alpha release quality so may change.
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*
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* [1] https://github.com/ARM-software/abi-aa/blob/main/pauthabielf64/pauthabielf64.rst
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*/
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struct {
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struct ptrauth_key apia;
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struct ptrauth_key apib;
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struct ptrauth_key apda;
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struct ptrauth_key apdb;
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struct ptrauth_key apga;
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} md_ptrauth_user;
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struct {
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struct ptrauth_key apia;
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} md_ptrauth_kern;
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uint64_t md_efirt_tmp;
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int md_efirt_dis_pf;
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int md_reserved0;
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uint64_t md_reserved[2];
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};
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struct mdproc {
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uint64_t md_tcr; /* TCR_EL1 fields to update */
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};
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#endif /* !LOCORE */
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/* Fields that can be set in md_tcr */
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#define MD_TCR_FIELDS TCR_TBI0
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#define KINFO_PROC_SIZE 1088
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#define KINFO_PROC32_SIZE 816
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#endif /* !_MACHINE_PROC_H_ */
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#endif /* !__arm__ */
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