02/05: [NTOSKRNL] Set the DRVO_BUILTIN_DRIVER DriverObject flag when a built-in driver is created using IoCreateDriver().

[Hermès Bélusca-Maïto]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=45012aa48632815ca50108...

commit 45012aa48632815ca5010825ab6e386eb438cc03
Author:     Hermès Bélusca-Maïto [e-mail]
AuthorDate: Tue Apr 3 02:14:48 2018 +0200
Commit:     Hermès Bélusca-Maïto [e-mail]
CommitDate: Sun Apr 22 16:52:38 2018 +0200

[NTOSKRNL] Set the DRVO_BUILTIN_DRIVER DriverObject flag when a built-in driver is created using IoCreateDriver().
---
 ntoskrnl/include/internal/io.h |  4 ++--
 ntoskrnl/io/iomgr/driver.c     | 15 ++++++++++++---
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/ntoskrnl/include/internal/io.h b/ntoskrnl/include/internal/io.h
index f536fef5b2..f47768d4a1 100644
--- a/ntoskrnl/include/internal/io.h
+++ b/ntoskrnl/include/internal/io.h
@@ -1091,9 +1091,9 @@ NTSTATUS
 NTAPI
 IopCreateDriver(IN PUNICODE_STRING DriverName OPTIONAL,
                 IN PDRIVER_INITIALIZE InitializationFunction,
-                IN PUNICODE_STRING RegistryPath,
+                IN PUNICODE_STRING RegistryPath OPTIONAL,
                 IN PCUNICODE_STRING ServiceName,
-                PLDR_DATA_TABLE_ENTRY ModuleObject,
+                IN PLDR_DATA_TABLE_ENTRY ModuleObject OPTIONAL,
                 OUT PDRIVER_OBJECT *pDriverObject);

VOID
diff --git a/ntoskrnl/io/iomgr/driver.c b/ntoskrnl/io/iomgr/driver.c
index 4f4df52979..f9de2e5065 100644
--- a/ntoskrnl/io/iomgr/driver.c
+++ b/ntoskrnl/io/iomgr/driver.c
@@ -1419,9 +1419,9 @@ NTSTATUS
 NTAPI
 IopCreateDriver(IN PUNICODE_STRING DriverName OPTIONAL,
                 IN PDRIVER_INITIALIZE InitializationFunction,
-                IN PUNICODE_STRING RegistryPath,
+                IN PUNICODE_STRING RegistryPath OPTIONAL,
                 IN PCUNICODE_STRING ServiceName,
-                PLDR_DATA_TABLE_ENTRY ModuleObject,
+                IN PLDR_DATA_TABLE_ENTRY ModuleObject OPTIONAL,
                 OUT PDRIVER_OBJECT *pDriverObject)
 {
     WCHAR NameBuffer[100];
@@ -1479,7 +1479,16 @@ try_again:
     RtlZeroMemory(DriverObject, ObjectSize);
     DriverObject->Type = IO_TYPE_DRIVER;
     DriverObject->Size = sizeof(DRIVER_OBJECT);
-    DriverObject->Flags = DRVO_LEGACY_DRIVER;
+
+    /*
+     * Check whether RegistryPath and ModuleObject are both NULL because
+     * IoCreateDriver() was called to initialize a built-in driver.
+     */
+    if ((RegistryPath != NULL) || (ModuleObject != NULL))
+        DriverObject->Flags = DRVO_LEGACY_DRIVER;
+    else
+        DriverObject->Flags = DRVO_BUILTIN_DRIVER;
+
     DriverObject->DriverExtension = (PDRIVER_EXTENSION)(DriverObject + 1);
     DriverObject->DriverExtension->DriverObject = DriverObject;
     DriverObject->DriverInit = InitializationFunction;