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authorIan Lewis <ianmlewis@gmail.com>2020-08-17 21:44:31 -0400
committerIan Lewis <ianmlewis@gmail.com>2020-08-17 21:44:31 -0400
commitac324f646ee3cb7955b0b45a7453aeb9671cbdf1 (patch)
tree0cbc5018e8807421d701d190dc20525726c7ca76 /test/syscalls/linux/rseq/syscalls.h
parent352ae1022ce19de28fc72e034cc469872ad79d06 (diff)
parent6d0c5803d557d453f15ac6f683697eeb46dab680 (diff)
Merge branch 'master' into ip-forwarding
- Merges aleksej-paschenko's with HEAD - Adds vfs2 support for ip_forward
Diffstat (limited to 'test/syscalls/linux/rseq/syscalls.h')
-rw-r--r--test/syscalls/linux/rseq/syscalls.h69
1 files changed, 69 insertions, 0 deletions
diff --git a/test/syscalls/linux/rseq/syscalls.h b/test/syscalls/linux/rseq/syscalls.h
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+++ b/test/syscalls/linux/rseq/syscalls.h
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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_