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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_SYSCALLS_H_
#define GVISOR_TEST_SYSCALLS_LINUX_RSEQ_SYSCALLS_H_
#include "test/syscalls/linux/rseq/types.h"
// Syscall numbers.
#if defined(__x86_64__)
constexpr int kGetpid = 39;
constexpr int kExitGroup = 231;
#elif defined(__aarch64__)
constexpr int kGetpid = 172;
constexpr int kExitGroup = 94;
#else
#error "Unknown architecture"
#endif
namespace gvisor {
namespace testing {
// Standalone system call interfaces.
// Note that these are all "raw" system call interfaces which encode
// errors by setting the return value to a small negative number.
// Use sys_errno() to check system call return values for errors.
// Maximum Linux error number.
constexpr int kMaxErrno = 4095;
// Errno values.
#define EPERM 1
#define EFAULT 14
#define EBUSY 16
#define EINVAL 22
// Get the error number from a raw system call return value.
// Returns a positive error number or 0 if there was no error.
static inline int sys_errno(uintptr_t rval) {
if (rval >= static_cast<uintptr_t>(-kMaxErrno)) {
return -static_cast<int>(rval);
}
return 0;
}
extern "C" uintptr_t raw_syscall(int number, ...);
static inline void sys_exit_group(int status) {
raw_syscall(kExitGroup, status);
}
static inline int sys_getpid() {
return static_cast<int>(raw_syscall(kGetpid));
}
} // namespace testing
} // namespace gvisor
#endif // GVISOR_TEST_SYSCALLS_LINUX_RSEQ_SYSCALLS_H_
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