驱动程序做出来后，怎么用呢？根据Four-F的说法，有三种方式：服务控制管理器(Service Control Manager (SCM).)
服务控制程序(Service Control Program (SCP).)和服务程序(service program).
下面我们就用服务控制程序(SCP)来实现驱动程序的动态加载，例子程序在 KmdKit/examples/simple/Beeper
代码如下：
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
;
; scp.asm
;
; Service Control Program for beeper.sys driver
;
; Written by Four-F (four-f@mail.ru)
;
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
.386
.model flat, stdcall
option casemap:none
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; I N C L U D E F I L E S
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
include /masm32/include/windows.inc
include /masm32/include/kernel32.inc
include /masm32/include/user32.inc
include /masm32/include/advapi32.inc
includelib /masm32/lib/kernel32.lib
includelib /masm32/lib/user32.lib
includelib /masm32/lib/advapi32.lib
include /masm32/Macros/Strings.mac
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; C O D E
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.code
start proc
local hSCManager:HANDLE
local hService:HANDLE
local acDriverPath[MAX_PATH]:CHAR
; Open a handle to the SC Manager database
invoke OpenSCManager, NULL, NULL, SC_MANAGER_CREATE_SERVICE
.if eax != NULL
mov hSCManager, eax
push eax
invoke GetFullPathName, $CTA0("beeper.sys"), sizeof acDriverPath, addr acDriverPath, esp
pop eax
; Register driver in SCM active database
invoke CreateService, hSCManager, $CTA0("beeper"), $CTA0("Nice Melody Beeper"), /
SERVICE_START + DELETE, SERVICE_KERNEL_DRIVER, SERVICE_DEMAND_START, /
SERVICE_ERROR_IGNORE, addr acDriverPath, NULL, NULL, NULL, NULL, NULL
.if eax != NULL
mov hService, eax
invoke StartService, hService, 0, NULL
; Here driver beeper.sys plays its nice melody
; and reports error to be removed from memory
; Remove driver from SCM database
invoke DeleteService, hService
invoke CloseServiceHandle, hService
.else
invoke MessageBox, NULL, $CTA0("Can't register driver."), NULL, MB_ICONSTOP
.endif
invoke CloseServiceHandle, hSCManager
.else
invoke MessageBox, NULL, $CTA0("Can't connect to Service Control Manager."), /
NULL, MB_ICONSTOP
.endif
invoke ExitProcess, 0
start endp
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;
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end start
；=============以下是驱动程序源码beeper.bat的内容===========
;@echo off
;goto make
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
;
; beeper - Kernel Mode Driver
; Makes beep thorough computer speaker
;
; Written by Four-F (four-f@mail.ru)
;
; WARNING: Tested W2000 & XP only!
;
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
.386
.model flat, stdcall
option casemap:none
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
; I N C L U D E F I L E S
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
include /masm32/include/w2k/ntstatus.inc
include /masm32/include/w2k/ntddk.inc
include /masm32/include/w2k/hal.inc
includelib /masm32/lib/w2k/hal.lib
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; U S E R D E F I N E D E Q U A T E S
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TIMER_FREQUENCY equ 1193167 ; 1,193,167 Hz
OCTAVE equ 2
;PITCH_A equ 440 ; 440,00 Hz
;PITCH_As equ 446 ; 466,16 Hz
;PITCH_H equ 494 ; 493,88 Hz
PITCH_C equ 523 ; 523,25 Hz
PITCH_Cs equ 554 ; 554,37 Hz
PITCH_D equ 587 ; 587,33 Hz
PITCH_Ds equ 622 ; 622,25 Hz
PITCH_E equ 659 ; 659,25 Hz
PITCH_F equ 698 ; 698,46 Hz
PITCH_Fs equ 740 ; 739,99 Hz
PITCH_G equ 784 ; 783,99 Hz
PITCH_Gs equ 831 ; 830,61 Hz
PITCH_A equ 880 ; 880,00 Hz
PITCH_As equ 988 ; 987,77 Hz
PITCH_H equ 1047 ; 1046,50 Hz
; We are going to play c-major chord
TONE_1 equ TIMER_FREQUENCY/(PITCH_C*OCTAVE)
TONE_2 equ TIMER_FREQUENCY/(PITCH_E*OCTAVE)
TONE_3 equ (PITCH_G*OCTAVE); for HalMakeBeep
DELAY equ 1800000h ; for my ~800mHz machine
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; U S E R D E F I N E D M A C R O S
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DO_DELAY MACRO
; Silly method, but it works ;-)
mov eax, DELAY
.while eax
dec eax
.endw
ENDM
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; C O D E
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.code
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; MakeBeep1
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MakeBeep1 proc dwPitch:DWORD
; Direct hardware access
cli
mov al, 10110110y
out 43h, al ; Timer 8253-5 (AT: 8254.2).
mov eax, dwPitch
out 42h, al
mov al, ah
out 42h, al
; speaker ON
in al, 61h
or al, 11y
out 61h, al
sti
DO_DELAY
cli
; speaker OFF
in al, 61h
and al, 11111100y
out 61h, al
sti
ret
MakeBeep1 endp
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; MakeBeep2
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
MakeBeep2 proc dwPitch:DWORD
; Hardware access via HAL using *_PORT_UCHAR/*_PORT_UCHAR functions
cli
invoke WRITE_PORT_UCHAR, 43h, 10110110y
mov eax, dwPitch
invoke WRITE_PORT_UCHAR, 42h, al
mov eax, dwPitch
invoke WRITE_PORT_UCHAR, 42h, ah
; speaker ON
invoke READ_PORT_UCHAR, 61h
or al, 11y
invoke WRITE_PORT_UCHAR, 61h, al
sti
DO_DELAY
cli
; speaker OFF
invoke READ_PORT_UCHAR, 61h
and al, 11111100y
invoke WRITE_PORT_UCHAR, 61h, al
sti
ret
MakeBeep2 endp
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; DriverEntry
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DriverEntry proc pDriverObject:PDRIVER_OBJECT, pusRegistryPath:PUNICODE_STRING
invoke MakeBeep1, TONE_1
invoke MakeBeep2, TONE_2
; Hardware access via hal.dll function HalMakeBeep
invoke HalMakeBeep, TONE_3
DO_DELAY
invoke HalMakeBeep, 0
mov eax, STATUS_DEVICE_CONFIGURATION_ERROR
ret
DriverEntry endp
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;
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end DriverEntry
:make
set drv=beeper
/masm32/bin/ml /nologo /c /coff %drv%.bat
/masm32/bin/link /nologo /driver /base:0x10000 /align:32 /out:%drv%.sys /subsystem:native %drv%.obj
del %drv%.obj
echo.
pause
rem=============以上是驱动程序源码beeper.bat的内容===========
我们双击KmdKit/examples/simple/Beeper/下的beeper.bat，编译生成beeper.sys,然后像编译一般的win32asm程序那样编译scp.asm,生成scp.exe,双击scp.exe，你听到了什么？是主板上的喇叭发出的声音，这是通过直接控制端口发出来的，我们已经突破了ring0的限制，高兴吗？
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