一、环境
hailei@hailyang-VirtualBox:~/learning/driver$ sudo lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.5 LTS
Release: 16.04
Codename: xenial
hailei@hailyang-VirtualBox:~/learning/driver$ echo $BASH_VERSION
4.3.48(1)-release
二、C文件
#include
#include
#include
static int __init dev_module_init(void)
{
printk(KERN_INFO"module init.\r\n");
return 0;
}
static void __exit _dev_module_exit(void)
{
printk(KERN_INFO"module exit.\r\n");
}
module_init(dev_module_init);
module_exit(_dev_module_exit);
MODULE_LICENSE("GPL");
三、Makefile
obj-m = test_c_dev.o
KERNEL = $(shell uname -r)
all:
make -C /lib/modules/$(KERNEL)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(KERNEL)/build M=$(PWD) clean
四、编译模块
hailei@hailyang-VirtualBox:~/learning/driver$ make all
make -C /lib/modules/4.15.0-38-generic/build M=/home/hailei/learning/driver modules
make[1]: Entering directory '/usr/src/linux-headers-4.15.0-38-generic'
Makefile:975: "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel"
CC [M] /home/hailei/learning/driver/test_c_dev.o
Building modules, stage 2.
MODPOST 1 modules
CC /home/hailei/learning/driver/test_c_dev.mod.o
LD [M] /home/hailei/learning/driver/test_c_dev.ko
make[1]: Leaving directory '/usr/src/linux-headers-4.15.0-38-generic'
hailei@hailyang-VirtualBox:~/learning/driver$
五、测试模块
hailei@hailyang-VirtualBox:~/learning/driver$ lsmod
Module Size Used by
vboxsf 45056 1
snd_intel8x0 40960 2
snd_ac97_codec 131072 1 snd_intel8x0
ac97_bus 16384 1 snd_ac97_codec
snd_pcm 98304 2 snd_intel8x0,snd_ac97_codec
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
crct10dif_pclmul 16384 0
snd_rawmidi 32768 1 snd_seq_midi
crc32_pclmul 16384 0
ghash_clmulni_intel 16384 0
pcbc 16384 0
binfmt_misc 20480 1
joydev 24576 0
aesni_intel 188416 0
snd_seq 65536 2 snd_seq_midi,snd_seq_midi_event
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
snd_timer 32768 2 snd_seq,snd_pcm
aes_x86_64 20480 1 aesni_intel
snd 81920 11 snd_seq,snd_seq_device,snd_intel8x0,snd_timer,snd_ac97_codec,snd_pcm,snd_rawmidi
input_leds 16384 0
crypto_simd 16384 1 aesni_intel
vboxvideo 36864 2
ttm 106496 1 vboxvideo
drm_kms_helper 172032 1 vboxvideo
glue_helper 16384 1 aesni_intel
cryptd 24576 3 crypto_simd,ghash_clmulni_intel,aesni_intel
intel_rapl_perf 16384 0
soundcore 16384 1 snd
serio_raw 16384 0
drm 401408 5 drm_kms_helper,vboxvideo,ttm
i2c_piix4 24576 0
fb_sys_fops 16384 1 drm_kms_helper
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
vboxguest 303104 5 vboxsf
mac_hid 16384 0
parport_pc 36864 0
ppdev 20480 0
lp 20480 0
parport 49152 3 parport_pc,lp,ppdev
autofs4 40960 2
hid_generic 16384 0
usbhid 49152 0
hid 118784 2 usbhid,hid_generic
ahci 36864 2
psmouse 151552 0
libahci 32768 1 ahci
e1000 143360 0
pata_acpi 16384 0
video 45056 0
hailei@hailyang-VirtualBox:~/learning/driver$ insmod test_c_dev.ko
insmod: ERROR: could not insert module test_c_dev.ko: Operation not permitted
hailei@hailyang-VirtualBox:~/learning/driver$ sudo insmod test_c_dev.ko
hailei@hailyang-VirtualBox:~/learning/driver$ lsmod
Module Size Used by
test_c_dev 16384 0
vboxsf 45056 1
snd_intel8x0 40960 2
snd_ac97_codec 131072 1 snd_intel8x0
ac97_bus 16384 1 snd_ac97_codec
snd_pcm 98304 2 snd_intel8x0,snd_ac97_codec
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
crct10dif_pclmul 16384 0
snd_rawmidi 32768 1 snd_seq_midi
crc32_pclmul 16384 0
ghash_clmulni_intel 16384 0
pcbc 16384 0
binfmt_misc 20480 1
joydev 24576 0
aesni_intel 188416 0
snd_seq 65536 2 snd_seq_midi,snd_seq_midi_event
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
snd_timer 32768 2 snd_seq,snd_pcm
aes_x86_64 20480 1 aesni_intel
snd 81920 11 snd_seq,snd_seq_device,snd_intel8x0,snd_timer,snd_ac97_codec,snd_pcm,snd_rawmidi
input_leds 16384 0
crypto_simd 16384 1 aesni_intel
vboxvideo 36864 2
ttm 106496 1 vboxvideo
drm_kms_helper 172032 1 vboxvideo
glue_helper 16384 1 aesni_intel
cryptd 24576 3 crypto_simd,ghash_clmulni_intel,aesni_intel
intel_rapl_perf 16384 0
soundcore 16384 1 snd
serio_raw 16384 0
drm 401408 5 drm_kms_helper,vboxvideo,ttm
i2c_piix4 24576 0
fb_sys_fops 16384 1 drm_kms_helper
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
vboxguest 303104 5 vboxsf
mac_hid 16384 0
parport_pc 36864 0
ppdev 20480 0
lp 20480 0
parport 49152 3 parport_pc,lp,ppdev
autofs4 40960 2
hid_generic 16384 0
usbhid 49152 0
hid 118784 2 usbhid,hid_generic
ahci 36864 2
psmouse 151552 0
libahci 32768 1 ahci
e1000 143360 0
pata_acpi 16384 0
video 45056 0
hailei@hailyang-VirtualBox:~/learning/driver$
