驱动程序的动态加载

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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 flatstdcall
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 flatstdcall
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

;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
;                           U S E R   D E F I N E D   E Q U A T E S                                 
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

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                                   
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

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

;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
;                                         MakeBeep1                                                 
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

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 alah
   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

;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
;                                            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

;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
;                                       DriverEntry                                                 
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

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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;                                                                                                   
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

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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