reorganize files

* src/ -> km/src/
* utils/ -> um/
* Move WDK 7.1-specific *.bat files to km/build/wdk7.1/
* Move WDK 8.1 Update 1 solutions to km/build/wdk8.1update/

21 files changed, 817 insertions, 0 deletions

diff --git a/km/src/dirs b/km/src/dirs
new file mode 100644
index 0000000..a32bc1d
--- /dev/null
+++ b/km/src/dirs
@@ -0,0 +1 @@
+DIRS = minimal simple special
diff --git a/km/src/minimal/main.c b/km/src/minimal/main.c
new file mode 100644
index 0000000..6983929
--- /dev/null
+++ b/km/src/minimal/main.c
@@ -0,0 +1,12 @@
+#include <ntddk.h>
+
+static void on_driver_unload(DRIVER_OBJECT *driver_object)
+{ }
+
+NTSTATUS DriverEntry(
+    DRIVER_OBJECT *driver_object,
+    UNICODE_STRING *registry_path)
+{
+    driver_object->DriverUnload = on_driver_unload;
+    return STATUS_SUCCESS;
+}
diff --git a/km/src/minimal/makefile b/km/src/minimal/makefile
new file mode 100644
index 0000000..5acbbd2
--- /dev/null
+++ b/km/src/minimal/makefile
@@ -0,0 +1 @@
+!INCLUDE $(NTMAKEENV)\makefile.def
diff --git a/km/src/minimal/sources b/km/src/minimal/sources
new file mode 100644
index 0000000..b6e92c3
--- /dev/null
+++ b/km/src/minimal/sources
@@ -0,0 +1,3 @@
+TARGETTYPE = DRIVER
+TARGETNAME = minimal
+SOURCES = main.c
diff --git a/km/src/simple/device.c b/km/src/simple/device.c
new file mode 100644
index 0000000..859ba67
--- /dev/null
+++ b/km/src/simple/device.c
@@ -0,0 +1,220 @@
+/*
+ * Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+ * This file is part of the "Windows 7 drivers" project.
+ * For details, see https://github.com/egor-tensin/windows7-drivers.
+ * Distributed under the MIT License.
+ */
+
+#include "device.h"
+
+#include <ntddk.h>
+
+static NTSTATUS device_open(DEVICE_OBJECT *device_object, IRP *irp)
+{
+    NTSTATUS status = STATUS_SUCCESS;
+
+    UNREFERENCED_PARAMETER(device_object);
+
+    irp->IoStatus.Status = status;
+    irp->IoStatus.Information = 0;
+    IoCompleteRequest(irp, IO_NO_INCREMENT);
+    return status;
+}
+
+typedef NTSTATUS (*ioctl_handler)(
+    void *, unsigned long,
+    void *, unsigned long,
+    ULONG_PTR *);
+
+static NTSTATUS handle_say_hello(
+    void *in_buf,
+    unsigned long in_buf_size,
+    void *out_buf,
+    unsigned long out_buf_size,
+    ULONG_PTR *nbwritten)
+{
+    UNREFERENCED_PARAMETER(in_buf);
+    UNREFERENCED_PARAMETER(in_buf_size);
+    UNREFERENCED_PARAMETER(out_buf);
+    UNREFERENCED_PARAMETER(out_buf_size);
+    UNREFERENCED_PARAMETER(nbwritten);
+
+    DbgPrint("Hello, world!\n");
+    return STATUS_SUCCESS;
+}
+
+static unsigned int i = 42;
+
+static NTSTATUS handle_exchange_ints(
+    void *in_buf,
+    unsigned long in_buf_size,
+    void *out_buf,
+    unsigned long out_buf_size,
+    ULONG_PTR *nbwritten)
+{
+    unsigned int temp_i;
+
+    if (in_buf_size != sizeof(temp_i))
+        return STATUS_INVALID_BUFFER_SIZE;
+
+    RtlCopyMemory(&temp_i, in_buf, in_buf_size);
+    DbgPrint("%08x\n", temp_i);
+
+    if (out_buf_size < sizeof(i))
+        return STATUS_BUFFER_TOO_SMALL;
+
+    RtlCopyMemory(out_buf, &i, sizeof(i));
+    *nbwritten += sizeof(i);
+    i = temp_i;
+    return STATUS_SUCCESS;
+}
+
+#define SAY_HELLO CTL_CODE(0x8000, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS)
+#define EXCHANGE_INTS CTL_CODE(0x8001, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+static NTSTATUS device_ioctl(DEVICE_OBJECT *device_object, IRP *irp)
+{
+    IO_STACK_LOCATION *io_stack_loc;
+    void* in_buf, *out_buf;
+    unsigned long in_buf_size, out_buf_size;
+    ioctl_handler handler;
+    NTSTATUS status = STATUS_UNSUCCESSFUL;
+
+    UNREFERENCED_PARAMETER(device_object);
+
+    irp->IoStatus.Status = status;
+    irp->IoStatus.Information = 0;
+    io_stack_loc = IoGetCurrentIrpStackLocation(irp);
+
+    in_buf = out_buf = irp->AssociatedIrp.SystemBuffer;
+    in_buf_size = io_stack_loc->Parameters.DeviceIoControl.InputBufferLength;
+    out_buf_size = io_stack_loc->Parameters.DeviceIoControl.OutputBufferLength;
+
+    switch (io_stack_loc->Parameters.DeviceIoControl.IoControlCode)
+    {
+        case SAY_HELLO:
+            handler = handle_say_hello;
+            break;
+
+        case EXCHANGE_INTS:
+            handler = handle_exchange_ints;
+            break;
+
+        default:
+            status = irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
+            goto complete_request;
+    }
+
+    status = irp->IoStatus.Status = handler(
+        in_buf, in_buf_size,
+        out_buf, out_buf_size,
+        &irp->IoStatus.Information);
+
+complete_request:
+    IoCompleteRequest(irp, IO_NO_INCREMENT);
+
+    return status;
+}
+
+typedef struct
+{
+    const wchar_t *path;
+    const wchar_t *symlink;
+}
+DeviceInfo;
+
+typedef struct
+{
+    DEVICE_OBJECT *object;
+    UNICODE_STRING path;
+    UNICODE_STRING symlink;
+}
+Device;
+
+#define NUMOF_DEVICES 2
+
+static DeviceInfo devices_info[NUMOF_DEVICES] =
+{
+    {
+        L"\\Device\\simple_device1",
+        L"\\DosDevices\\simple_device1",
+    },
+    {
+        L"\\Device\\simple_device2",
+        L"\\DosDevices\\simple_device2",
+    },
+};
+
+static Device devices[NUMOF_DEVICES];
+
+static void destroy_device(int i)
+{
+    IoDeleteSymbolicLink(&devices[i].symlink);
+    IoDeleteDevice(devices[i].object);
+}
+
+void destroy_devices()
+{
+    int i;
+    for (i = 0; i < NUMOF_DEVICES; ++i)
+        destroy_device(i);
+}
+
+static NTSTATUS set_up_device(DRIVER_OBJECT *driver_object, int i)
+{
+    NTSTATUS status = STATUS_SUCCESS;
+
+    DbgPrint("Setting up device...\n");
+    DbgPrint("\tPath: %ws\n", devices_info[i].path);
+    DbgPrint("\tSymlink: %ws\n", devices_info[i].symlink);
+
+    RtlInitUnicodeString(&devices[i].path, devices_info[i].path);
+    RtlInitUnicodeString(&devices[i].symlink, devices_info[i].symlink);
+
+    status = IoCreateDevice(
+        driver_object,
+        0,
+        &devices[i].path,
+        FILE_DEVICE_UNKNOWN,
+        FILE_DEVICE_SECURE_OPEN,
+        FALSE,
+        &devices[i].object);
+
+    if (!NT_SUCCESS(status))
+        return status;
+
+    devices[i].object->Flags |= DO_BUFFERED_IO;
+    devices[i].object->Flags &= ~DO_DEVICE_INITIALIZING;
+
+    if (!NT_SUCCESS(status = IoCreateSymbolicLink(
+            &devices[i].symlink, &devices[i].path)))
+        goto delete_device;
+
+    return status;
+
+delete_device:
+    IoDeleteDevice(devices[i].object);
+
+    return status;
+}
+
+NTSTATUS set_up_devices(DRIVER_OBJECT *driver_object)
+{
+    int i, j;
+    NTSTATUS status = STATUS_SUCCESS;
+
+    for (i = 0; i < NUMOF_DEVICES; ++i)
+        if (!NT_SUCCESS(status = set_up_device(driver_object, i)))
+            goto destroy_devices;
+
+    driver_object->MajorFunction[IRP_MJ_CREATE] = device_open;
+    driver_object->MajorFunction[IRP_MJ_DEVICE_CONTROL] = device_ioctl;
+
+    return status;
+
+destroy_devices:
+    for (j = 0; j < i; ++j)
+        destroy_device(j);
+
+    return status;
+}
diff --git a/km/src/simple/device.h b/km/src/simple/device.h
new file mode 100644
index 0000000..4f117e9
--- /dev/null
+++ b/km/src/simple/device.h
@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+ * This file is part of the "Windows 7 drivers" project.
+ * For details, see https://github.com/egor-tensin/windows7-drivers.
+ * Distributed under the MIT License.
+ */
+
+#pragma once
+
+#include <ntddk.h>
+
+NTSTATUS set_up_devices(DRIVER_OBJECT *);
+void destroy_devices();
diff --git a/km/src/simple/main.c b/km/src/simple/main.c
new file mode 100644
index 0000000..5148727
--- /dev/null
+++ b/km/src/simple/main.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+ * This file is part of the "Windows 7 drivers" project.
+ * For details, see https://github.com/egor-tensin/windows7-drivers.
+ * Distributed under the MIT License.
+ */
+
+#include "device.h"
+
+#include <ntddk.h>
+
+static void on_driver_unload(DRIVER_OBJECT *driver_object)
+{
+    UNREFERENCED_PARAMETER(driver_object);
+
+    DbgPrint("simple: unloading...\n");
+    destroy_devices();
+}
+
+NTSTATUS DriverEntry(
+    DRIVER_OBJECT *driver_object,
+    UNICODE_STRING *registry_path)
+{
+    UNREFERENCED_PARAMETER(registry_path);
+
+    DbgPrint("simple: loading...\n");
+    driver_object->DriverUnload = on_driver_unload;
+    return set_up_devices(driver_object);
+}
diff --git a/km/src/simple/makefile b/km/src/simple/makefile
new file mode 100644
index 0000000..5acbbd2
--- /dev/null
+++ b/km/src/simple/makefile
@@ -0,0 +1 @@
+!INCLUDE $(NTMAKEENV)\makefile.def
diff --git a/km/src/simple/sources b/km/src/simple/sources
new file mode 100644
index 0000000..1a5ce00
--- /dev/null
+++ b/km/src/simple/sources
@@ -0,0 +1,3 @@
+TARGETTYPE = DRIVER
+TARGETNAME = simple
+SOURCES = device.c main.c
diff --git a/km/src/special/dirs b/km/src/special/dirs
new file mode 100644
index 0000000..479f4db
--- /dev/null
+++ b/km/src/special/dirs
@@ -0,0 +1 @@
+DIRS = nt_path_converter sysenter
diff --git a/km/src/special/nt_path_converter/control_codes.h b/km/src/special/nt_path_converter/control_codes.h
new file mode 100644
index 0000000..3fb2aff
--- /dev/null
+++ b/km/src/special/nt_path_converter/control_codes.h
@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+ * This file is part of the "Windows 7 drivers" project.
+ * For details, see https://github.com/egor-tensin/windows7-drivers.
+ * Distributed under the MIT License.
+ */
+
+#pragma once
+
+#include <ntddk.h>
+
+#define CONVERT_NT_PATH CTL_CODE(0x8000, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS)
diff --git a/km/src/special/nt_path_converter/device.c b/km/src/special/nt_path_converter/device.c
new file mode 100644
index 0000000..a179984
--- /dev/null
+++ b/km/src/special/nt_path_converter/device.c
@@ -0,0 +1,203 @@
+/*
+ * Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+ * This file is part of the "Windows 7 drivers" project.
+ * For details, see https://github.com/egor-tensin/windows7-drivers.
+ * Distributed under the MIT License.
+ */
+
+#include "control_codes.h"
+#include "device.h"
+#include "nt2dos.h"
+
+#include <ntddk.h>
+
+static NTSTATUS device_open(DEVICE_OBJECT *device_object, IRP *irp)
+{
+    NTSTATUS status = STATUS_SUCCESS;
+
+    UNREFERENCED_PARAMETER(device_object);
+
+    irp->IoStatus.Status = status;
+    irp->IoStatus.Information = 0;
+    IoCompleteRequest(irp, IO_NO_INCREMENT);
+    return status;
+}
+
+typedef NTSTATUS (*ioctl_handler)(
+    void *, unsigned long,
+    void *, unsigned long,
+    ULONG_PTR *);
+
+static NTSTATUS handle_convert_nt_path(
+    void *in_buf,
+    unsigned long in_buf_size,
+    void *out_buf,
+    unsigned long out_buf_size,
+    ULONG_PTR *nbwritten)
+{
+    UNICODE_STRING uUnresolved, uResolved;
+    NTSTATUS status = STATUS_SUCCESS;
+
+    DbgPrint("nt_path_converter: unresolved path: %ws\n", (WCHAR *) in_buf);
+    DbgPrint("nt_path_converter: unresolved size: %lu\n", in_buf_size);
+
+    RtlInitUnicodeString(&uUnresolved, (WCHAR *) in_buf);
+    status = nt2dos(&uResolved, &uUnresolved);
+
+    if (!NT_SUCCESS(status))
+        return status;
+
+    *nbwritten = uResolved.Length + sizeof(WCHAR);
+
+    DbgPrint("nt_path_converter: resolved path: %wZ\n", &uResolved);
+    DbgPrint("nt_path_converter: resolved size: %Iu\n", *nbwritten);
+
+    if (out_buf_size < *nbwritten)
+    {
+        status = STATUS_BUFFER_OVERFLOW;
+        goto free_resolved;
+    }
+
+    RtlFillMemory(out_buf, *nbwritten, L'\0');
+    RtlCopyMemory(out_buf, uResolved.Buffer, uResolved.Length);
+
+free_resolved:
+    ExFreePool(uResolved.Buffer);
+
+    return status;
+}
+
+static NTSTATUS device_ioctl(DEVICE_OBJECT *device_object, IRP *irp)
+{
+    IO_STACK_LOCATION *io_stack_loc;
+    void* in_buf, *out_buf;
+    unsigned long in_buf_size, out_buf_size;
+    ioctl_handler handler;
+    NTSTATUS status = STATUS_UNSUCCESSFUL;
+
+    UNREFERENCED_PARAMETER(device_object);
+
+    irp->IoStatus.Status = status;
+    irp->IoStatus.Information = 0;
+    io_stack_loc = IoGetCurrentIrpStackLocation(irp);
+
+    in_buf = out_buf = irp->AssociatedIrp.SystemBuffer;
+    in_buf_size = io_stack_loc->Parameters.DeviceIoControl.InputBufferLength;
+    out_buf_size = io_stack_loc->Parameters.DeviceIoControl.OutputBufferLength;
+
+    switch (io_stack_loc->Parameters.DeviceIoControl.IoControlCode)
+    {
+        case CONVERT_NT_PATH:
+            handler = handle_convert_nt_path;
+            break;
+
+        default:
+            status = irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
+            goto complete_request;
+    }
+
+    status = irp->IoStatus.Status = handler(
+        in_buf, in_buf_size,
+        out_buf, out_buf_size,
+        &irp->IoStatus.Information);
+
+complete_request:
+    IoCompleteRequest(irp, IO_NO_INCREMENT);
+
+    return status;
+}
+
+typedef struct
+{
+    const wchar_t *path;
+    const wchar_t *symlink;
+}
+DeviceInfo;
+
+typedef struct
+{
+    DEVICE_OBJECT *object;
+    UNICODE_STRING path;
+    UNICODE_STRING symlink;
+}
+Device;
+
+#define NUMOF_DEVICES 1
+
+static DeviceInfo devices_info[NUMOF_DEVICES] =
+{
+    {
+        L"\\Device\\nt_path_converter",
+        L"\\DosDevices\\nt_path_converter",
+    },
+};
+
+static Device devices[NUMOF_DEVICES];
+
+static void destroy_device(int i)
+{
+    IoDeleteSymbolicLink(&devices[i].symlink);
+    IoDeleteDevice(devices[i].object);
+}
+
+void destroy_devices()
+{
+    int i;
+    for (i = 0; i < NUMOF_DEVICES; ++i)
+        destroy_device(i);
+}
+
+static NTSTATUS set_up_device(DRIVER_OBJECT *driver_object, int i)
+{
+    NTSTATUS status = STATUS_SUCCESS;
+
+    RtlInitUnicodeString(&devices[i].path, devices_info[i].path);
+    RtlInitUnicodeString(&devices[i].symlink, devices_info[i].symlink);
+
+    status = IoCreateDevice(
+        driver_object,
+        0,
+        &devices[i].path,
+        FILE_DEVICE_UNKNOWN,
+        FILE_DEVICE_SECURE_OPEN,
+        FALSE,
+        &devices[i].object);
+
+    if (!NT_SUCCESS(status))
+        return status;
+
+    devices[i].object->Flags |= DO_BUFFERED_IO;
+    devices[i].object->Flags &= ~DO_DEVICE_INITIALIZING;
+
+    if (!NT_SUCCESS(status = IoCreateSymbolicLink(
+            &devices[i].symlink, &devices[i].path)))
+        goto delete_device;
+
+    return status;
+
+delete_device:
+    IoDeleteDevice(devices[i].object);
+
+    return status;
+}
+
+NTSTATUS set_up_devices(DRIVER_OBJECT *driver_object)
+{
+    int i, j;
+    NTSTATUS status = STATUS_SUCCESS;
+
+    for (i = 0; i < NUMOF_DEVICES; ++i)
+        if (!NT_SUCCESS(status = set_up_device(driver_object, i)))
+            goto destroy_devices;
+
+    driver_object->MajorFunction[IRP_MJ_CREATE] = device_open;
+    driver_object->MajorFunction[IRP_MJ_DEVICE_CONTROL] = device_ioctl;
+
+    return status;
+
+destroy_devices:
+    for (j = 0; j < i; ++j)
+        destroy_device(j);
+
+    return status;
+}
diff --git a/km/src/special/nt_path_converter/device.h b/km/src/special/nt_path_converter/device.h
new file mode 100644
index 0000000..4f117e9
--- /dev/null
+++ b/km/src/special/nt_path_converter/device.h
@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+ * This file is part of the "Windows 7 drivers" project.
+ * For details, see https://github.com/egor-tensin/windows7-drivers.
+ * Distributed under the MIT License.
+ */
+
+#pragma once
+
+#include <ntddk.h>
+
+NTSTATUS set_up_devices(DRIVER_OBJECT *);
+void destroy_devices();
diff --git a/km/src/special/nt_path_converter/main.c b/km/src/special/nt_path_converter/main.c
new file mode 100644
index 0000000..a1c08e8
--- /dev/null
+++ b/km/src/special/nt_path_converter/main.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+ * This file is part of the "Windows 7 drivers" project.
+ * For details, see https://github.com/egor-tensin/windows7-drivers.
+ * Distributed under the MIT License.
+ */
+
+#include "device.h"
+
+#include <ntddk.h>
+
+static void on_driver_unload(DRIVER_OBJECT *driver_object)
+{
+    UNREFERENCED_PARAMETER(driver_object);
+
+    destroy_devices();
+}
+
+NTSTATUS DriverEntry(
+    DRIVER_OBJECT *driver_object,
+    UNICODE_STRING *registry_path)
+{
+    UNREFERENCED_PARAMETER(registry_path);
+
+    driver_object->DriverUnload = on_driver_unload;
+    return set_up_devices(driver_object);
+}
diff --git a/km/src/special/nt_path_converter/makefile b/km/src/special/nt_path_converter/makefile
new file mode 100644
index 0000000..5acbbd2
--- /dev/null
+++ b/km/src/special/nt_path_converter/makefile
@@ -0,0 +1 @@
+!INCLUDE $(NTMAKEENV)\makefile.def
diff --git a/km/src/special/nt_path_converter/nt2dos.c b/km/src/special/nt_path_converter/nt2dos.c
new file mode 100644
index 0000000..d1bdb3d
--- /dev/null
+++ b/km/src/special/nt_path_converter/nt2dos.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+ * This file is part of the "Windows 7 drivers" project.
+ * For details, see https://github.com/egor-tensin/windows7-drivers.
+ * Distributed under the MIT License.
+ */
+
+#include <ntifs.h>
+
+#include "nt2dos.h"
+
+static NTSTATUS get_object_name_info(
+    void *object,
+    OBJECT_NAME_INFORMATION **object_name_info)
+{
+    unsigned long nbneeded;
+    NTSTATUS status = STATUS_SUCCESS;
+
+    status = ObQueryNameString(object, NULL, 0, &nbneeded);
+
+    if (status != STATUS_INFO_LENGTH_MISMATCH)
+        return status;
+
+    *object_name_info = ExAllocatePoolWithTag(PagedPool, nbneeded, '1l');
+
+    if (*object_name_info == NULL)
+        return STATUS_INSUFFICIENT_RESOURCES;
+
+    status = ObQueryNameString(object, *object_name_info, nbneeded, &nbneeded);
+
+    if (!NT_SUCCESS(status))
+        goto free_object_name_info;
+
+    return status;
+
+free_object_name_info:
+    ExFreePool(*object_name_info);
+
+    return status;
+}
+
+NTSTATUS nt2dos(UNICODE_STRING *u_resolved, UNICODE_STRING *u_unresolved)
+{
+    IO_STATUS_BLOCK io_status_block;
+    DEVICE_OBJECT *volume_object;
+    FILE_OBJECT *file_object;
+    HANDLE file;
+    OBJECT_ATTRIBUTES file_attrs;
+    OBJECT_NAME_INFORMATION *file_name_info, *volume_name_info;
+    UNICODE_STRING u_dos_name;
+    USHORT u_resolved_size;
+    NTSTATUS status = STATUS_SUCCESS;
+
+    InitializeObjectAttributes(
+        &file_attrs,
+        u_unresolved,
+        OBJ_CASE_INSENSITIVE | OBJ_OPENIF,
+        NULL,
+        NULL);
+
+    status = ZwCreateFile(
+        &file,
+        FILE_READ_ATTRIBUTES,
+        &file_attrs,
+        &io_status_block,
+        NULL,
+        FILE_ATTRIBUTE_NORMAL,
+        FILE_SHARE_READ | FILE_SHARE_WRITE,
+        FILE_OPEN,
+        FILE_SYNCHRONOUS_IO_NONALERT,
+        NULL,
+        0);
+
+    if (!NT_SUCCESS(status))
+        return status;
+
+    status = ObReferenceObjectByHandle(
+        file,
+        FILE_READ_ATTRIBUTES,
+        *IoFileObjectType,
+        KernelMode,
+        &file_object,
+        NULL);
+
+    if (!NT_SUCCESS(status))
+        goto close_file;
+
+    status = get_object_name_info(file_object, &file_name_info);
+
+    if (!NT_SUCCESS(status))
+        goto close_file;
+
+    if (file_object->Vpb == NULL)
+    {
+        u_resolved->Buffer = ExAllocatePoolWithTag(
+            PagedPool, file_name_info->Name.Length, '1l');
+
+        if (u_resolved->Buffer == NULL)
+        {
+            status = STATUS_INSUFFICIENT_RESOURCES;
+            goto free_file_name_info;
+        }
+
+        RtlInitEmptyUnicodeString(
+            u_resolved, u_resolved->Buffer, file_name_info->Name.Length);
+        RtlCopyUnicodeString(u_resolved, &file_name_info->Name);
+        goto free_file_name_info;
+    }
+
+    volume_object = file_object->Vpb->RealDevice;
+    status = get_object_name_info(volume_object, &volume_name_info);
+
+    if (!NT_SUCCESS(status))
+        goto free_file_name_info;
+
+    status = IoVolumeDeviceToDosName(volume_object, &u_dos_name);
+
+    if (!NT_SUCCESS(status))
+        goto free_volume_name_info;
+
+    u_resolved_size = file_name_info->Name.Length - volume_name_info->Name.Length + u_dos_name.Length;
+
+    u_resolved->Buffer = ExAllocatePoolWithTag(PagedPool, u_resolved_size, '1l');
+
+    if (u_resolved->Buffer == NULL)
+    {
+        status = STATUS_INSUFFICIENT_RESOURCES;
+        goto free_dos_name;
+    }
+
+    RtlInitEmptyUnicodeString(u_resolved, u_resolved->Buffer, u_resolved_size);
+
+    RtlCopyUnicodeString(u_resolved, &u_dos_name);
+    file_name_info->Name.Buffer += volume_name_info->Name.Length / sizeof(wchar_t);
+    file_name_info->Name.Length -= volume_name_info->Name.Length;
+    RtlUnicodeStringCat(u_resolved, &file_name_info->Name);
+
+free_dos_name:
+    ExFreePool(u_dos_name.Buffer);
+
+free_volume_name_info:
+    ExFreePool(volume_name_info);
+
+free_file_name_info:
+    ExFreePool(file_name_info);
+
+close_file:
+    ZwClose(file);
+
+    return status;
+}
diff --git a/km/src/special/nt_path_converter/nt2dos.h b/km/src/special/nt_path_converter/nt2dos.h
new file mode 100644
index 0000000..ce0b690
--- /dev/null
+++ b/km/src/special/nt_path_converter/nt2dos.h
@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+ * This file is part of the "Windows 7 drivers" project.
+ * For details, see https://github.com/egor-tensin/windows7-drivers.
+ * Distributed under the MIT License.
+ */
+
+#pragma once
+
+#include <ntstrsafe.h>
+
+NTSTATUS nt2dos(UNICODE_STRING *resolved, UNICODE_STRING *unresolved);
diff --git a/km/src/special/nt_path_converter/sources b/km/src/special/nt_path_converter/sources
new file mode 100644
index 0000000..02a42cd
--- /dev/null
+++ b/km/src/special/nt_path_converter/sources
@@ -0,0 +1,3 @@
+TARGETTYPE = DRIVER
+TARGETNAME = nt_path_converter
+SOURCES = device.c main.c nt2dos.c
diff --git a/km/src/special/sysenter/main.c b/km/src/special/sysenter/main.c
new file mode 100644
index 0000000..9eb9b28
--- /dev/null
+++ b/km/src/special/sysenter/main.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+ * This file is part of the "Windows 7 drivers" project.
+ * For details, see https://github.com/egor-tensin/windows7-drivers.
+ * Distributed under the MIT License.
+ */
+
+#include <ntddk.h>
+
+static __int64 old_msr_value = 0;
+static void *old_ki_fast_call_entry = NULL;
+
+static void __stdcall log_system_call()
+{
+    static LONG count = 0;
+    static const LONG throttle = 10000;
+
+    LONG n = InterlockedIncrement(&count);
+
+    if (n % throttle == 0)
+        DbgPrint("Another %ld of `sysenter`s (eax=)!\n", throttle);
+}
+
+static void __declspec(naked) new_ki_fast_call_entry()
+{
+    __asm
+    {
+        pushad
+        pushfd
+        mov ecx, 0x23
+        push 0x30
+        pop fs
+        mov ds, cx
+        mov es, cx
+        call log_system_call
+        popfd
+        popad
+        jmp [old_ki_fast_call_entry]
+    }
+}
+
+#define IA32_SYSENTER_EIP 0x176
+
+static void hook_sysenter()
+{
+    /*
+    __asm
+    {
+        mov ecx, IA32_SYSENTER_EIP
+        rdmsr
+        mov old_ki_fast_call_entry, eax
+        mov eax, new_ki_fast_call_entry
+        xor edx, edx
+        wrmsr
+    }
+    */
+
+    old_msr_value = __readmsr(IA32_SYSENTER_EIP);
+#pragma warning(push)
+#pragma warning(disable: 4305)
+    old_ki_fast_call_entry = (void *) old_msr_value;
+#pragma warning(pop)
+    __writemsr(IA32_SYSENTER_EIP, new_ki_fast_call_entry);
+}
+
+static void unhook_sysenter()
+{
+    /*
+    __asm
+    {
+        mov ecx, IA32_SYSENTER_EIP
+        mov eax, old_ki_fast_call_entry
+        xor edx, edx
+        wrmsr
+    }
+    */
+
+    __writemsr(IA32_SYSENTER_EIP, old_msr_value);
+}
+
+static void on_driver_unload(DRIVER_OBJECT *driver_object)
+{
+    KTIMER timer;
+    LARGE_INTEGER time_out;
+
+    UNREFERENCED_PARAMETER(driver_object);
+
+    unhook_sysenter();
+
+    KeInitializeTimer(&timer);
+    time_out.QuadPart = -30000000;
+    KeSetTimer(&timer, time_out, NULL);
+
+    KeWaitForSingleObject(&timer, Executive, KernelMode, FALSE, NULL);
+}
+
+NTSTATUS DriverEntry(
+    DRIVER_OBJECT *driver_object,
+    UNICODE_STRING *registry_path)
+{
+    UNREFERENCED_PARAMETER(registry_path);
+
+    driver_object->DriverUnload = on_driver_unload;
+    hook_sysenter();
+    return STATUS_SUCCESS;
+}
diff --git a/km/src/special/sysenter/makefile b/km/src/special/sysenter/makefile
new file mode 100644
index 0000000..5acbbd2
--- /dev/null
+++ b/km/src/special/sysenter/makefile
@@ -0,0 +1 @@
+!INCLUDE $(NTMAKEENV)\makefile.def
diff --git a/km/src/special/sysenter/sources b/km/src/special/sysenter/sources
new file mode 100644
index 0000000..d6371b3
--- /dev/null
+++ b/km/src/special/sysenter/sources
@@ -0,0 +1,4 @@
+TARGETTYPE = DRIVER
+TARGETNAME = sysenter
+SOURCES =
+I386_SOURCES = main.c