55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
// Copyright 2019 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef GVISOR_TEST_SYSCALLS_LINUX_RSEQ_UAPI_H_
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#define GVISOR_TEST_SYSCALLS_LINUX_RSEQ_UAPI_H_
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// User-kernel ABI for restartable sequences.
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// Standard types.
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//
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// N.B. This header will be included in targets that do have the standard
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// library, so we can't shadow the standard type names.
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using __u32 = __UINT32_TYPE__;
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using __u64 = __UINT64_TYPE__;
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#ifdef __x86_64__
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// Syscall numbers.
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constexpr int kRseqSyscall = 334;
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#else
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#error "Unknown architecture"
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#endif // __x86_64__
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struct rseq_cs {
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__u32 version;
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__u32 flags;
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__u64 start_ip;
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__u64 post_commit_offset;
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__u64 abort_ip;
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} __attribute__((aligned(4 * sizeof(__u64))));
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// N.B. alignment is enforced by the kernel.
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struct rseq {
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__u32 cpu_id_start;
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__u32 cpu_id;
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struct rseq_cs* rseq_cs;
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__u32 flags;
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} __attribute__((aligned(4 * sizeof(__u64))));
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constexpr int kRseqFlagUnregister = 1 << 0;
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constexpr int kRseqCPUIDUninitialized = -1;
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#endif // GVISOR_TEST_SYSCALLS_LINUX_RSEQ_UAPI_H_
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