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// Copyright 2019 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef GVISOR_TEST_SYSCALLS_LINUX_RSEQ_UAPI_H_
#define GVISOR_TEST_SYSCALLS_LINUX_RSEQ_UAPI_H_
#include <stdint.h>
// User-kernel ABI for restartable sequences.
#ifdef __x86_64__
// Syscall numbers.
constexpr int kRseqSyscall = 334;
#else
#error "Unknown architecture"
#endif // __x86_64__
struct rseq_cs {
uint32_t version;
uint32_t flags;
uint64_t start_ip;
uint64_t post_commit_offset;
uint64_t abort_ip;
} __attribute__((aligned(4 * sizeof(uint64_t))));
// N.B. alignment is enforced by the kernel.
struct rseq {
uint32_t cpu_id_start;
uint32_t cpu_id;
struct rseq_cs* rseq_cs;
uint32_t flags;
} __attribute__((aligned(4 * sizeof(uint64_t))));
constexpr int kRseqFlagUnregister = 1 << 0;
constexpr int kRseqCPUIDUninitialized = -1;
#endif // GVISOR_TEST_SYSCALLS_LINUX_RSEQ_UAPI_H_
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