Index: sandbox/linux/services/kernel_to_errno.h |
diff --git a/sandbox/linux/services/kernel_to_errno.h b/sandbox/linux/services/kernel_to_errno.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..42f9299f2db2bd77ed0623c3f5b312bab4100b9e |
--- /dev/null |
+++ b/sandbox/linux/services/kernel_to_errno.h |
@@ -0,0 +1,37 @@ |
+// Copyright 2014 The Chromium Authors. All rights reserved. |
jln (very slow on Chromium)
2014/05/16 19:30:17
- Please, add a _unittest.cc file for this with a
nedeljko
2014/05/19 17:37:23
These are pretty basic functions.
Since functions
jln (very slow on Chromium)
2014/05/20 01:57:47
What should be tested is what these function do.
nedeljko
2014/05/20 14:36:41
I was thinking to move this (implementation of fun
nedeljko
2014/05/22 17:38:55
Done.
|
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef SANDBOX_LINUX_SERVICES_KERNEL_TO_ERRNO_H |
+#define SANDBOX_LINUX_SERVICES_KERNEL_TO_ERRNO_H |
+ |
+namespace { |
jln (very slow on Chromium)
2014/05/16 19:30:17
This should be "namespace sandbox".
nedeljko
2014/05/22 17:38:55
Done.
|
+ |
+inline int KernelRetToErrno(int kernel_ret) { |
jln (very slow on Chromium)
2014/05/16 19:30:17
In practice I've only seen this used taking an err
nedeljko
2014/05/22 17:38:55
Done.
|
+#if defined(__mips__) |
+ // On MIPS, kernel returns kernel_ret (instead of -kernel_ret) |
+ return kernel_ret; |
+#else |
+ return -kernel_ret; |
+#endif |
+} |
+ |
+inline int RetValToKernelRet(int ret_val, ucontext_t* ctx) { |
jln (very slow on Chromium)
2014/05/16 19:30:17
Please add valid #include for ucontext_t.
jln (very slow on Chromium)
2014/05/16 19:30:17
Let's make this a function that returns void inste
jln (very slow on Chromium)
2014/05/16 21:27:10
Let's have the implementation hidden in a .cc file
nedeljko
2014/05/22 17:38:55
Done.
nedeljko
2014/05/22 17:38:55
Done.
nedeljko
2014/05/22 17:38:55
Done.
|
+#if defined(__mips__) |
+ // Mips ABI states that on error a3 CPU register should be set to one |
+ // and if there is no error, it should be zero. |
+ if (ret_val < 0) { |
+ // On MIPS, kernel returns errno (instead of -errno) |
+ ret_val = -ret_val; |
+ (ctx)->uc_mcontext.gregs[7] = 1; |
+ } else |
+ (ctx)->uc_mcontext.gregs[7] = 0; |
+ return ret_val; |
+#else |
+ return ret_val; |
+#endif |
+} |
+ |
+} // namespace |
+ |
+#endif // SANDBOX_LINUX_SERVICES_KERNEL_TO_ERRNO_H |