mirror of
https://github.com/gatieme/LDD-LinuxDeviceDrivers.git
synced 2026-09-23 05:03:33 +08:00
内核锁与进程间通信...
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gatieme
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# ------------------------------------------------------------------------------
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#
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# Makefile for the LDD-LinuxDeviceDrivers.
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#
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# Author: gatieme
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# Create: 2016-07-29 15:50:46
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# Last modified: 2016-07-29 16:10:29
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# Description:
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# This program is loaded as a kernel(v2.6.18 or later) module.
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# Use "make install" to load it into kernel.
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# Use "make remove" to remove the module out of kernel.
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#
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# ------------------------------------------------------------------------------
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ROOT=..
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#PLATFORM=$(shell $(ROOT)/systype.sh)
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#include $(ROOT)/Make.defines.$(PLATFORM)
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# my driver description
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DRIVER_VERSION := "1.0.0"
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DRIVER_AUTHOR := "Gatieme @ AderStep Inc..."
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DRIVER_DESC := "Linux input module for Elo MultiTouch(MT) devices"
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DRIVER_LICENSE := "Dual BSD/GPL"
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MODULE_NAME := ker_rw
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ifneq ($(KERNELRELEASE),)
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#CFG_FLAGS += -O2 -I./
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#EXTRA_CFLAGS += $(C_FLAGS) $(CFG_INC) $(CFG_INC)
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obj-m := $(MODULE_NAME).o #print_vmarea.o
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else
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KERNELDIR ?= /lib/modules/$(shell uname -r)/build
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PWD := $(shell pwd)
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modules:
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make -C $(KERNELDIR) M=$(PWD) modules
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modules_install:
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make -C $(KERNELDIR) M=$(PWD) modules_install
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insmod:
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sudo insmod $(MODULE_NAME).ko
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reinsmod:
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sudo rmmod $(MODULE_NAME)
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sudo insmod $(MODULE_NAME).ko
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github:
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cd $(ROOT) && make github
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rmmod:
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sudo rmmod $(MODULE_NAME)
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test :
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sudo ../injector/memInjector -l stack -m random -t word_0 --time 1 --timeout 3 -p 1
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clean:
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make -C $(KERNELDIR) M=$(PWD) clean
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rm -f modules.order Module.symvers Module.markers
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.PHNOY:
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modules modules_install clean
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endif
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@@ -0,0 +1,127 @@
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <asm/uaccess.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <linux/device.h>
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#if 0
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#include <mach/gpio.h>
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#endif
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/poll.h>
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#include <linux/spinlock.h>
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#define KER_RW_R8 100
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#define KER_RW_R16 101 /* 切记！cmd命令值不能乱定义 */
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#define KER_RW_R32 102
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#define KER_RW_W8 103
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#define KER_RW_W16 104
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#define KER_RW_W32 105
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static int major;
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static struct class *class;
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static long ker_rw_ioctl( struct file *file, unsigned int cmd, unsigned long arg)
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{
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volatile unsigned char *p8;
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volatile unsigned short *p16;
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volatile unsigned int *p32;
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unsigned int val;
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unsigned int addr;
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unsigned int buf[2];
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copy_from_user(buf, (const void __user *)arg,8);
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addr = buf[0];
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val = buf[1];
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p8 = (volatile unsigned char *)ioremap(addr, 4);
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p16 = p8;
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p32 = p8;
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switch (cmd)
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{
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case KER_RW_R8:
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{
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val = *p8;
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copy_to_user((void __user *)(arg+4), &val, 4);
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break;
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}
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case KER_RW_R16:
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{
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val = *p16;
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copy_to_user((void __user *)(arg+4), &val, 4);
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break;
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}
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case KER_RW_R32:
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{
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val = *p32;
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copy_to_user((void __user *)(arg+4), &val, 4);
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break;
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}
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case KER_RW_W8:
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{
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*p8 = val;
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break;
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}
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case KER_RW_W16:
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{
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*p16 = val;
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break;
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}
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case KER_RW_W32:
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{
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*p32 = val;
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break;
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}
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}
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iounmap(p8);
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return 0;
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}
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static struct file_operations ker_rw_ops = {
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.owner = THIS_MODULE,
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.unlocked_ioctl = ker_rw_ioctl,
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};
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static int ker_rw_init(void)
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{
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major = register_chrdev(0, "ker_rw", &ker_rw_ops);
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class = class_create(THIS_MODULE, "ker_rw");
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/* 为了让mdev根据这些信息来创建设备节点 */
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device_create(class, NULL, MKDEV(major, 0), NULL, "ker_rw"); /* /dev/ker_rw */
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return 0;
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}
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static void ker_rw_exit(void)
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{
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device_destroy(class,MKDEV(major, 0));
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class_destroy(class);
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unregister_chrdev(major, "ker_rw");
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}
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module_init(ker_rw_init);
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module_exit(ker_rw_exit);
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MODULE_LICENSE("GPL");
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@@ -0,0 +1,120 @@
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <poll.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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<span style="color:#ff0000;">#define KER_RW_R8 100
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#define KER_RW_R16 101
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#define KER_RW_R32 102
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#define KER_RW_W8 103
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#define KER_RW_W16 104
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#define KER_RW_W32 105</span>
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/* Usage:
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* ./regeditor r8 addr [num] /* 用法 */
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* ./regeditor r16 addr [num]
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* ./regeditor r32 addr [num]
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*
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* ./regeditor w8 addr val
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* ./regeditor w16 addr val
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* ./regeditor w32 addr val
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*/
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void print_usage(char *file)
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{
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printf("Usage:\n");
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printf("%s <r8 | r16 | r32> <phy addr> [num]\n", file);
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printf("%s <w8 | w16 |w32> <phy addr> <val>\n", file);
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}
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int main(int argc, char **argv)
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{
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int fd;
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unsigned int buf[2];
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unsigned int i;
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unsigned int num;
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if ((argc != 3) && (argc != 4))
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{
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print_usage(argv[0]);
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return -1;
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}
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fd = open("/dev/ker_rw", O_RDWR);
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if (fd < 0)
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{
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printf("can't open /dev/ker_rw\n");
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return -2;
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}
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/* addr */
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buf[0] = strtoul(argv[2], NULL, 0);
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if (argc == 4)
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{
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buf[1] = strtoul(argv[3], NULL, 0);
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num = buf[1];
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}
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else
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{
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num = 1;
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}
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if (strcmp(argv[1], "r8") == 0)
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{
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for ( i = 0; i < num; i++)
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{
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ioctl(fd, KER_RW_R8, buf); /* val = buf[1] */
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printf("%02d. [%08x] = %02x\n", i, buf[0], (unsigned char)buf[1]);
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buf[0] += 1;
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}
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}
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else if (strcmp(argv[1], "r16") == 0)
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{
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for ( i = 0; i < num; i++)
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{
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ioctl(fd, KER_RW_R16, buf); /* val = buf[1] */
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printf("%02d. [%08x] = %04x\n", i, buf[0], (unsigned short)buf[1]);
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buf[0] += 2;
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}
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}
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else if (strcmp(argv[1], "r32") == 0)
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{
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for ( i = 0; i < num; i++)
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{
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ioctl(fd, KER_RW_R32, buf); /* val = buf[1] */
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printf("%02d. [%08x] = %08x\n", i, buf[0], (unsigned int)buf[1]);
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buf[0] += 4;
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}
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}
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else if (strcmp(argv[1], "w8") == 0)
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{
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ioctl(fd, KER_RW_W8, buf); /* val = buf[1] */
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}
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else if (strcmp(argv[1], "w16") == 0)
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{
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ioctl(fd, KER_RW_W16, buf); /* val = buf[1] */
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}
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else if (strcmp(argv[1], "w32") == 0)
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{
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ioctl(fd, KER_RW_W32, buf); /* val = buf[1] */
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}
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else
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{
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printf(argv[0]);
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return -1;
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}
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return 0;
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}
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