b74baf4ad0
Add ucontext/sigcontext definition and signal handling support for LoongArch. Cc: Eric Biederman <ebiederm@xmission.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
36 lines
1.3 KiB
C
36 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef __LOONGARCH_UAPI_ASM_UCONTEXT_H
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#define __LOONGARCH_UAPI_ASM_UCONTEXT_H
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/**
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* struct ucontext - user context structure
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* @uc_flags:
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* @uc_link:
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* @uc_stack:
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* @uc_mcontext: holds basic processor state
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* @uc_sigmask:
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* @uc_extcontext: holds extended processor state
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*/
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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 /* __LOONGARCH_UAPI_ASM_UCONTEXT_H */
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