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