2. 3. 2.6.29 2.6.33 ? ? http://android.git.kernel.org/
2.6.292.6.29 2.6.332.6.33 ?? ??
http://android.git.kernel.org/http://android.git.kernel.org/ 4.
insmodinsmod module_init( fabase_init )module_init( fabase_init )
fabase_init()fabase_init()
platform_driver_register(&fabase_driver) struct platform_driver
fabase_driverstruct platform_driver fabase_driver .probe =
fabase_probe .remove = fabase_remove .suspend = fabase_suspend
.resume = fabase_resume .driver = { .name =
FABASE_DEVICE_DRIVER_NAME, } platform_device_register_simple(
FABASE_DEVICE_DRIVER_NAME fabase_probe()fabase_probe() 5.
rmmodrmmod module_exit(fabase_exit)module_exit(fabase_exit)
fabase_exit()fabase_exit()
platform_device_unregister(fabase_device) struct platform_driver
fabase_driverstruct platform_driver fabase_driver .probe =
fabase_probe .remove = fabase_remove .suspend = fabase_suspend
.resume = fabase_resume .driver = { .name =
FABASE_DEVICE_DRIVER_NAME, } fabase_remove()fabase_remove() 6.
struct platform_device *platform_device_register_simple ( const
char *name, int id, struct resource *, unsigned int ); void
platform_device_unregister( struct platform_device *pdev ); 7. int
platform_device_register( struct platform_device * pdev ); void
platform_device_del( struct platform_device *pdev ); 8.
[root@falinux nfs]$ insmod fa_virtual.ko IORESOURCE_MEM 0 ->
[10000000:1FFFFFFF] IORESOURCE_MEM 1 -> [20000000:2FFFFFFF]
IORESOURCE_IRQ 0 -> [00000003:00000004] IORESOURCE_IRQ 1 ->
[00000005:00000006] [root@falinux nfs]$ lsmod Module Size Used by
Not tainted fa_virtual 2140 0 [root@falinux nfs]$ rmmod
fa_virtual.ko 9. struct file_operations xxx_fop = { open :
xxx_open, read : xxx_read, write : xxx_write, ioctl : xxx_ioctl,
release : xxx_release }; xxx_exit( . . . ) { : } open( . . . )
read( . . . ) write( . . . ) ioctl( . . . ) close( . . . ) insmod
rmmod Hardware interrupt xxx_init( . . . ) { : } xxx_interrupt( . .
. ) { : } xxx_open( . . . ) { : } xxx_read( . . . ) { : }
xxx_write( . . . ) { : } xxx_ioctl( . . . ) { : } xxx_release( . .
. ) { : } 10. (1) JNI (1) JNI(1) JNI H/WH/W JAVA JAVA JNIJNI 11.
(2) (2)(2) H/WH/W JAVA JAVA C C LOCAL NETWORK (127.0.0.1) TCP or
UDP LOCAL NETWORK (127.0.0.1) TCP or UDP 12. NDK NDKNDK Java C/C++
JavaJava C/C++C/C++ 13. NDK NDKNDK Bionic LIBCBionic LIBCBionic
LIBC BIONIC LIBCBIONIC LIBC GNU LIBCGNU LIBC Bionic LIBCBionic LIBC
{ANDROID_SROUCE}/ bionic/libc/SYSCALLS.txt{ANDROID_SROUCE}/
bionic/libc/SYSCALLS.txt 14. NDK NDKNDK 15. NDK NDKNDK NDK $ mkdir
arm-eabi-4.2.1 $ cd arm-eabi-4.2.1 $ cp a
{NDK_DIR}/build/prebuilt/linux-x86/arm-eabi-4.2.1/* . $ cp a
{NDK_DIR}/build/platform/android-5/arch-arm/usr/include
./arm-eabi/. $ cp a
{NDK_DIR}/build/platform/android-5/arch-arm/usr/lib ./arm-eabi/. $
mkdir arm-eabi-4.2.1 $ cd arm-eabi-4.2.1 $ cp a
{NDK_DIR}/build/prebuilt/linux-x86/arm-eabi-4.2.1/* . $ cp a
{NDK_DIR}/build/platform/android-5/arch-arm/usr/include
./arm-eabi/. $ cp a
{NDK_DIR}/build/platform/android-5/arch-arm/usr/lib ./arm-eabi/.
Get Android toolchain from NDKGet Android toolchain from NDK 16.
NDK NDKNDK NDK 17. C CC service mydemon /usr/bin/mydemon oneshot
service mydemon /usr/bin/mydemon oneshot Android demon script
sample init.rcAndroid demon script sample init.rc 18. JNI JNIJNI
Build the Hello-JNI $ cd {NDK_DIR}/samples/hello-jni $
{NDK_DIR}/ndk-build $ cd {NDK_DIR}/samples/hello-jni $
{NDK_DIR}/ndk-build Change directory to hello-jni in NDKChange
directory to hello-jni in NDK $ cd
~/project/android-ndk-r4//samples/hello-jni $
~/project/android-ndk-r4/ndk-build Gdbserver : [arm-eabi-4.4.0]
/home/hyowon/project/android-ndk-r4/samples/hello-
jni/libs/armeabi/gdbserver Gdbsetup :
/home/hyowon/project/android-ndk-r4/samples/hello-jni/libs/armeabi/gdb.setup
Gdbsetup : + source directory
/home/hyowon/project/android-ndk-r4/samples/hello-jni/jni Compile
thumb : hello-jni
/home/hyowon/project/android-ndk-r4/samples/hello- jni/libs/armeabi
$ cd ~/project/android-ndk-r4//samples/hello-jni $
~/project/android-ndk-r4/ndk-build Gdbserver : [arm-eabi-4.4.0]
/home/hyowon/project/android-ndk-r4/samples/hello-
jni/libs/armeabi/gdbserver Gdbsetup :
/home/hyowon/project/android-ndk-r4/samples/hello-jni/libs/armeabi/gdb.setup
Gdbsetup : + source directory
/home/hyowon/project/android-ndk-r4/samples/hello-jni/jni Compile
thumb : hello-jni
/home/hyowon/project/android-ndk-r4/samples/hello- jni/libs/armeabi
Succeed message from NDKSucceed message from NDK 19. JNI JNIJNI
Hello-JNI Create project from existing sourceCreate project from
existing source Project TreeProject Tree 20. JNI JNIJNI Hello-JNI
Screenshot of Hello-JNI sampleScreenshot of Hello-JNI sample 21.
JNI JNIJNI hello-jni.c #include #include /* HelloJni.java JNI */
jstring Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv*
env, jobject this ) { return (*env)->NewStringUTF(env, "Hello
from JNI !"); } #include #include /* HelloJni.java JNI */ jstring
Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv* env,
jobject this ) { return (*env)->NewStringUTF(env, "Hello from
JNI !"); } 22. JNI JNIJNI HelloJni.java package
com.example.hellojni; import android.app.Activity; import
android.widget.TextView; import android.os.Bundle; public class
HelloJni extends Activity { /* */ @Override public void
onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); /* TextView . stringFromJNI()
JNI . */ TextView tv = new TextView(this); tv.setText(
stringFromJNI() ); setContentView(tv); } /* 'hello-jni' . */ public
native String stringFromJNI(); public native String
unimplementedStringFromJNI(); /* hello-jni . */ static {
System.loadLibrary("hello-jni"); } } package com.example.hellojni;
import android.app.Activity; import android.widget.TextView; import
android.os.Bundle; public class HelloJni extends Activity { /* */
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); /* TextView . stringFromJNI()
JNI . */ TextView tv = new TextView(this); tv.setText(
stringFromJNI() ); setContentView(tv); } /* 'hello-jni' . */ public
native String stringFromJNI(); public native String
unimplementedStringFromJNI(); /* hello-jni . */ static {
System.loadLibrary("hello-jni"); } } 23. Binder - IPC ashmem -
Android shared memory pmem - Process memory allocator logger -
system logging facilit wakelock - used for power management oom
handling - lowmem notifications alarm paranoid network security
timed gpio - Generic gpio is a mechanism to allow programs to
access and manipulate gpio registers from user space RAM_CONSOLE
http://elinux.org/Android_Kernel_Features#Important_update
BinderBinder -- IPCIPC ashmemashmem -- Android shared memoryAndroid
shared memory pmempmem -- Process memory allocatorProcess memory
allocator loggerlogger -- system logging facilitsystem logging
facilit wakelockwakelock -- used for power managementused for power
management oom handlingoom handling -- lowmem notificationslowmem
notifications alarmalarm paranoid network securityparanoid network
security timed gpiotimed gpio -- Generic gpio is a mechanismGeneric
gpio is a mechanism to allow programs to access andto allow
programs to access and manipulate gpio registers frommanipulate
gpio registers from user spaceuser space RAM_CONSOLERAM_CONSOLE
http://elinux.org/Android_Kernel_Features#Important_updatehttp://elinux.org/Android_Kernel_Features#Important_update
24. Binder drivers/android/binder.c include/linux/binder.h
drivers/android/binder.cdrivers/android/binder.c
include/linux/binder.hinclude/linux/binder.h 25. ashmem mm/ashmem.c
ioctl * ASHMEM_SET_NAME * ASHMEM_GET_NAME * ASHMEM_SET_SIZE *
ASHMEM_GET_SIZE * ASHMEM_SET_PROT_MASK * ASHMEM_GET_PROT_MASK *
ASHMEM_PIN * ASHMEM_UNPIN * ASHMEM_GET_PIN_STATUS *
ASHMEM_PURGE_ALL_CACHES mm/ashmem.cmm/ashmem.c ioctlioctl *
ASHMEM_SET_NAME* ASHMEM_SET_NAME * ASHMEM_GET_NAME* ASHMEM_GET_NAME
* ASHMEM_SET_SIZE* ASHMEM_SET_SIZE * ASHMEM_GET_SIZE*
ASHMEM_GET_SIZE * ASHMEM_SET_PROT_MASK* ASHMEM_SET_PROT_MASK *
ASHMEM_GET_PROT_MASK* ASHMEM_GET_PROT_MASK * ASHMEM_PIN* ASHMEM_PIN
* ASHMEM_UNPIN* ASHMEM_UNPIN * ASHMEM_GET_PIN_STATUS*
ASHMEM_GET_PIN_STATUS * ASHMEM_PURGE_ALL_CACHES*
ASHMEM_PURGE_ALL_CACHES 26. pmem large (1-16+MB) physically
contiguousregions of memory shared between userspace and kernel
drivers drivers/misc/pmem.c include/linux/android_pmem.h large
(1large (1--16+MB) physically16+MB) physically contiguousregions of
memorycontiguousregions of memory shared between userspace
andshared between userspace and kernel driverskernel drivers
drivers/misc/pmem.cdrivers/misc/pmem.c
include/linux/android_pmem.hinclude/linux/android_pmem.h 27. logger
drivers/android/logging.c 'logcat' command
drivers/android/logging.cdrivers/android/logging.c 'logcat'
command'logcat' command 28. wakelock drivers/android/power.c ioctl
* WAKE_LOCK_IDLE * WAKE_LOCK_SUSPEND
drivers/android/power.cdrivers/android/power.c ioctlioctl *
WAKE_LOCK_IDLE* WAKE_LOCK_IDLE * WAKE_LOCK_SUSPEND*
WAKE_LOCK_SUSPEND 29. oom handling drivers/misc/lowmemorykiller.c
security/lowmem.c
drivers/misc/lowmemorykiller.cdrivers/misc/lowmemorykiller.c
security/lowmem.csecurity/lowmem.c 30. 31. - . . , , . . 32. - User
Level User Level /LCD /LCD /LCD /LCD /dev/fb0 : /dev/fb0 : ioctl
open Cable I/F mmap VFS memory direct access BUS I/F () : : 33.
FBIOGET_VSCREENINFO - struct fb_var_screeninfo FBIOPUT_VSCREENINFO
- struct fb_var_screeninfo , , FBIOGET_FSCREENINFO - struct
fb_fix_screeninfo FBIOGETCMAP - struct fb_cmap_user FBIOPUTCMAP -
struct fb_cmap_user IOCTL 34. - ioctlioctl FBIOPUT_VSCREENINFO -
struct fb_var_screeninfoFBIOPUT_VSCREENINFO - struct
fb_var_screeninfo int fb_set_var(struct fb_info *info, struct
fb_var_screeninfo *var)int fb_set_var(struct fb_info *info, struct
fb_var_screeninfo *var) ret = info->fbops->fb_check_var(var,
info); info->fbops->fb_set_par(info); fb_pan_display(info,
&info->var); Int fb_pan_display(struct fb_info *info, struct
fb_var_screeninfo *var)Int fb_pan_display(struct fb_info *info,
struct fb_var_screeninfo *var) err =
info->fbops->fb_pan_display(var, info) 35. (kbd) (mousedev,
mic) (joydev) (tsdev) (evdev) 36. input Kbd mousedev, mice joydev
tsdev evdev touch screen device driver keyboard device driver mouse
device driver keyboard api mouse api Joystick api toutch screen api
event api application Kernel 2.6.24 tsdev
linux/driver/char/keyboard.c 37. INPUT :
linux/include/linux/input.h static inline void
init_input_dev(struct input_dev *dev); dev . void
input_register_device(struct input_dev *); . void
input_unregister_device(struct input_dev *); . void
input_event(struct input_dev *dev, unsigned int type, unsigned int
code, int value); . static inline void input_report_key(struct
input_dev *dev, unsigned int code, int value); input_event . 38.
static inline void input_report_rel(struct input_dev *dev, unsigned
int code, int value); input_event . static inline void
input_report_abs(struct input_dev *dev, unsigned int code, int
value); input_event . static inline void input_sync(struct
input_dev *dev); input_event . static inline void
input_set_abs_params(struct input_dev *dev, int axis, int min, int
max, int fuzz, int flat); . 39. . ..
