46 lines
1.8 KiB
C
46 lines
1.8 KiB
C
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/*
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* Copyright (C) 2012 ARM Ltd.
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* Copyright (C) 2017 SiFive, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* This file was copied from arch/arm64/include/uapi/asm/ucontext.h
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*/
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#ifndef _UAPI__ASM_UCONTEXT_H
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#define _UAPI__ASM_UCONTEXT_H
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#include <linux/types.h>
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struct ucontext {
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unsigned long uc_flags;
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struct ucontext *uc_link;
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stack_t uc_stack;
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sigset_t uc_sigmask;
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/* There's some padding here to allow sigset_t to be expanded in the
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* future. Though this is unlikely, other architectures put uc_sigmask
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* at the end of this structure and explicitly state it can be
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* expanded, so we didn't want to box ourselves in here. */
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__u8 __unused[1024 / 8 - sizeof(sigset_t)];
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/* We can't put uc_sigmask at the end of this structure because we need
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* to be able to expand sigcontext in the future. For example, the
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* vector ISA extension will almost certainly add ISA state. We want
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* to ensure all user-visible ISA state can be saved and restored via a
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* ucontext, so we're putting this at the end in order to allow for
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* infinite extensibility. Since we know this will be extended and we
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* assume sigset_t won't be extended an extreme amount, we're
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* prioritizing this. */
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struct sigcontext uc_mcontext;
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};
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#endif /* _UAPI__ASM_UCONTEXT_H */
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