[PATCH 3/5] ntoskrnl.exe: Implement PsIsSystemThread.
Derek Lesho
dereklesho52 at gmail.com
Thu Mar 28 15:47:22 CDT 2019
Signed-off-by: Derek Lesho <dereklesho52 at Gmail.com>
---
dlls/ntoskrnl.exe/ntoskrnl.c | 23 +++++++++++++++++++++++
dlls/ntoskrnl.exe/ntoskrnl.exe.spec | 2 +-
dlls/ntoskrnl.exe/tests/driver.c | 19 +++++++++++++++++++
3 files changed, 43 insertions(+), 1 deletion(-)
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index 61a3e4ba92..335918f99f 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -2987,6 +2987,29 @@ HANDLE WINAPI PsGetCurrentThreadId(void)
}
+/***********************************************************************
+ * PsIsSystemThread (NTOSKRNL.EXE.@)
+ */
+BOOLEAN WINAPI PsIsSystemThread(PETHREAD thread)
+{
+ HANDLE hThread;
+ DWORD tid = 0;
+
+ if (!thread)
+ return TRUE;
+
+ /* get handle, then id */
+ if ((hThread = kernel_object_handle( thread, THREAD_ALL_ACCESS )))
+ {
+ tid = GetProcessId( hThread );
+ NtClose(hThread);
+ }
+
+ /* Should only show up as client_tid but request_thread is added for redundancy */
+ return tid != client_tid && tid != request_thread;
+}
+
+
/***********************************************************************
* PsGetVersion (NTOSKRNL.EXE.@)
*/
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index 43f47470a9..0e9e6a7630 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -907,7 +907,7 @@
@ stdcall PsImpersonateClient(ptr ptr long long long)
@ stub PsInitialSystemProcess
@ stub PsIsProcessBeingDebugged
-@ stub PsIsSystemThread
+@ stdcall PsIsSystemThread(ptr)
@ stub PsIsThreadImpersonating
@ stub PsIsThreadTerminating
@ stub PsJobType
diff --git a/dlls/ntoskrnl.exe/tests/driver.c b/dlls/ntoskrnl.exe/tests/driver.c
index 88237461d5..c436f2c3d9 100644
--- a/dlls/ntoskrnl.exe/tests/driver.c
+++ b/dlls/ntoskrnl.exe/tests/driver.c
@@ -814,6 +814,24 @@ static void test_ob_reference(const WCHAR *test_path)
ok(!status, "ZwClose failed: %#x\n", status);
}
+static void WINAPI system_thread( void *arg )
+{
+ BOOLEAN result;
+
+ ok((result = PsIsSystemThread()), "got %u\n", result);
+
+ PsTerminateSystemThread( STATUS_SUCCESS );
+}
+
+static void test_system_thread()
+{
+ BOOLEAN result;
+
+ ok(!(result = PsIsSystemThread()), "got %u\n", result);
+
+ run_thread( system_thread, (void*)0 );
+}
+
static NTSTATUS main_test(DEVICE_OBJECT *device, IRP *irp, IO_STACK_LOCATION *stack, ULONG_PTR *info)
{
ULONG length = stack->Parameters.DeviceIoControl.OutputBufferLength;
@@ -856,6 +874,7 @@ static NTSTATUS main_test(DEVICE_OBJECT *device, IRP *irp, IO_STACK_LOCATION *st
test_stack_callout();
test_lookaside_list();
test_ob_reference(test_input->path);
+ test_system_thread();
/* print process report */
if (winetest_debug)
--
2.20.1
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