更新了CFS调度器类的学习实例和博客信息...

21cnbao/code/06/globalmem驱动/Makefile

@@ -0,0 +1,71 @@
+# ------------------------------------------------------------------------------
+#
+# Makefile for the LDD-LinuxDeviceDrivers.
+#
+# Author: gatieme
+# Create: 2016-07-29 15:50:46
+# Last modified: 2016-07-29 16:10:29
+# Description:
+# 	This program is loaded as a kernel(v2.6.18 or later) module.
+# 	Use "make install" to load it into kernel.
+# 	Use "make remove" to remove the module out of kernel.
+#
+# ------------------------------------------------------------------------------
+
+
+ROOT=..
+#PLATFORM=$(shell $(ROOT)/systype.sh)
+#include $(ROOT)/Make.defines.$(PLATFORM)
+
+MODULE_NAME := globalmem
+
+ifneq ($(KERNELRELEASE),)
+
+#CFG_FLAGS += -O2  -I./
+#EXTRA_CFLAGS  += $(C_FLAGS) $(CFG_INC) $(CFG_INC)
+
+
+
+obj-m := $(MODULE_NAME).o #globalmem.o
+
+else
+
+KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+
+PWD := $(shell pwd)
+
+modules:
+	make -C $(KERNELDIR) M=$(PWD) modules
+
+modules_install:
+	make -C $(KERNELDIR) M=$(PWD) modules_install
+
+
+
+insmod:
+	sudo insmod $(MODULE_NAME).ko
+
+reinsmod:
+	sudo rmmod $(MODULE_NAME)
+	sudo insmod $(MODULE_NAME).ko
+
+github:
+	cd $(ROOT) && make github
+
+rmmod:
+	sudo rmmod $(MODULE_NAME)
+
+test :
+	sudo ../injector/memInjector -l stack -m random -t word_0 --time 1 --timeout 3 -p 1
+
+clean:
+	make -C $(KERNELDIR) M=$(PWD) clean
+	rm -f modules.order Module.symvers Module.markers
+
+.PHNOY:
+	modules modules_install clean
+
+
+
+endif
+

21cnbao/code/06/globalmem驱动/globalmem.c

@@ -5,6 +5,10 @@
     <author@linuxdriver.cn>. All Rights Reserved.
 ======================================================================*/
 
+
+
+#include <linux/version.h>
+
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/fs.h>
@@ -14,14 +18,25 @@
 #include <linux/init.h>
 #include <linux/cdev.h>
 #include <asm/io.h>
+
+//  error: implicit declaration of function `kfree`
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(3, 19, 0)
 #include <asm/system.h>
+#else
+#include <linux/slab.h>
+#endif
+
 #include <asm/uaccess.h>
 
 #define GLOBALMEM_SIZE      0x1000            /*  全局内存最大4K字节          */
 #define MEM_CLEAR           0x1               /*  清0全局内存                 */
-#define GLOBALMEM_MAJOR     254               /*  预设的globalmem的主设备号   */
+#define GLOBALMEM_MAJOR     300               /*  预设的globalmem的主设备号   */
+
+
+/*  globalmem的设备号   */
+static int globalmem_major = GLOBALMEM_MAJOR;
+module_param(globalmem_major, int, S_IRUGO);
 
-static globalmem_major = GLOBALMEM_MAJOR;
 
 /*  globalmem设备结构体 */
 struct globalmem_dev
@@ -34,6 +49,7 @@ struct globalmem_dev
 
 struct globalmem_dev *globalmem_devp;         /*  设备结构体指针    */
 
+
 /*  文件打开函数    */
 int globalmem_open(struct inode *inode, struct file *filp)
 {
@@ -64,8 +80,8 @@ static int globalmem_ioctl(
         {
             memset(dev->mem, 0, GLOBALMEM_SIZE);
             printk(KERN_INFO "globalmem is set to zero\n");
-        }
             break;
+        }
 
         default:
         {
@@ -218,7 +234,14 @@ static const struct file_operations globalmem_fops =
     .llseek = globalmem_llseek,
     .read = globalmem_read,
     .write = globalmem_write,
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 36)
     .ioctl = globalmem_ioctl,
+#else
+    .unlocked_ioctl = globalmem_ioctl,
+    .compat_ioctl = globalmem_ioctl,
+#endif
+
     .open = globalmem_open,
     .release = globalmem_release,
 };
@@ -246,15 +269,17 @@ int globalmem_init(void)
     int result;
     dev_t devno = MKDEV(globalmem_major, 0);
 
-    /* 申请设备号*/
-    if (globalmem_major)
+    /*  申请设备号  */
+    if (globalmem_major != 0)
     {
         result = register_chrdev_region(devno, 1, "globalmem");
+        printk(KERN_INFO "register char device drivers [globalmem], MAJOR = %d\n", globalmem_major);
     }
     else  /* 动态申请设备号 */
     {
         result = alloc_chrdev_region(&devno, 0, 1, "globalmem");
         globalmem_major = MAJOR(devno);
+        printk(KERN_INFO "alloc char device drivers [globalmem], MAJOR = %d\n", globalmem_major);
     }
 
     if (result < 0)
@@ -288,10 +313,19 @@ void globalmem_exit(void)
     unregister_chrdev_region(MKDEV(globalmem_major, 0), 1); /*释放设备号*/
 }
 
-MODULE_AUTHOR("Song Baohua");
-MODULE_LICENSE("Dual BSD/GPL");
 
-module_param(globalmem_major, int, S_IRUGO);
+//Driver Information
+#define DRIVER_VERSION  "1.0.0"
+#define DRIVER_AUTHOR   "Gatieme @ AderStep Inc..."
+#define DRIVER_DESC     "Linux input module for Elo MultiTouch(MT) devices"
+#define DRIVER_LICENSE  "Dual BSD/GPL"
+
+// Kernel Module Information
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE(DRIVER_LICENSE);
+
 
 module_init(globalmem_init);
 module_exit(globalmem_exit);

Makefile.multi

@@ -17,6 +17,14 @@ ROOT=..
 #PLATFORM=$(shell $(ROOT)/systype.sh)
 #include $(ROOT)/Make.defines.$(PLATFORM)
 
+#	my driver description
+DRIVER_VERSION := "1.0.0"
+DRIVER_AUTHOR  := "Gatieme @ AderStep Inc..."
+DRIVER_DESC    := "Linux input module for Elo MultiTouch(MT) devices"
+DRIVER_LICENSE := "Dual BSD/GPL"
+
+
+
 MODULE_NAME := memory-engine
 
 ifneq ($(KERNELRELEASE),)

study/driver/hello_dev/Makefile

@@ -0,0 +1,18 @@
+ifneq ($(KERNELRELEASE),)
+
+obj-m := hello.o
+
+else
+
+KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+
+PWD := $(shell pwd)
+
+all:
+	make -C $(KERNELDIR) M=$(PWD) modules
+
+clean:
+	make -C $(KERNELDIR) M=$(PWD) clean
+
+
+endif

study/driver/hello_dev/hello.c

@@ -0,0 +1,112 @@
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <asm/uaccess.h>
+
+
+static ssize_t hello_read(struct file * file, char * buf, size_t count, loff_t *ppos)
+{
+    char *hello_str = "Hello, world!\n";
+
+    int len = strlen(hello_str); /* Don't include the null byte. */
+
+    /*     * We only support reading the whole string at once.     */
+    if (count < len)
+        return -EINVAL;
+
+    /*
+    * If file position is non-zero, then assume the string has
+    * been read and indicate there is no more data to be read.
+    */
+    if (*ppos != 0)
+    {
+        return 0;
+    }
+
+    /*
+    * Besides copying the string to the user provided buffer,
+    * this function also checks that the user has permission to
+    * write to the buffer, that it is mapped, etc.
+    */
+    if (copy_to_user(buf, hello_str, len))
+    {
+        return -EINVAL;
+    }
+
+    /*
+    * Tell the user how much data we wrote.
+    */
+    *ppos = len;
+    return len;
+}
+
+
+static const struct file_operations hello_fops =
+{
+    .owner        = THIS_MODULE,
+    .read        = hello_read,
+};
+
+
+static struct miscdevice hello_dev =
+{
+    /*
+    * We don't care what minor number we end up with, so tell the
+    * kernel to just pick one.
+    */
+    MISC_DYNAMIC_MINOR,
+    /*
+    * Name ourselves /dev/hello.
+    */
+    "hello",
+    /*
+    * What functions to call when a program performs file
+    * operations on the device.
+    */
+    &hello_fops
+};
+
+
+static int __init hello_init(void)
+{
+    int ret;
+    /*
+    * Create the "hello" device in the /sys/class/misc directory.
+    * Udev will automatically create the /dev/hello device using
+    * the default rules.
+    */
+    ret = misc_register(&hello_dev);
+    if (ret != 0)
+    {
+        printk(KERN_ERR
+            "Unable to register \"Hello, world!\" misc devicen");
+    }
+
+    return ret;
+}
+module_init(hello_init);
+
+
+static void __exit hello_exit(void)
+{
+    misc_deregister(&hello_dev);
+}
+module_exit(hello_exit);
+
+
+/*  Driver Information  */
+#define DRIVER_VERSION  "1.0.0"
+#define DRIVER_AUTHOR   "Gatieme @ AderStep Inc..."
+#define DRIVER_DESC     "Linux input module for Elo MultiTouch(MT) devices"
+#define DRIVER_LICENSE  "Dual BSD/GPL"
+
+/*  Kernel Module Information   */
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE(DRIVER_LICENSE);
+
+
+module_init(globalmem_init);
+module_exit(globalmem_exit);

study/driver/hello_proc/.hello.ko.cmd

@@ -0,0 +1 @@
+cmd_/home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/driver/hello/hello.ko := aarch64-linux-gnu-ld -EL -r  -T /usr/src/linux-headers-3.14.0/scripts/module-common.lds --build-id  -o /home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/driver/hello/hello.ko /home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/driver/hello/hello.o /home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/driver/hello/hello.mod.o

study/driver/hello_proc/.tmp_versions/hello.mod

@@ -0,0 +1,2 @@
+/home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/driver/hello/hello.ko
+/home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/driver/hello/hello.o

study/driver/hello_proc/Makefile

@@ -0,0 +1,19 @@
+ifneq ($(KERNELRELEASE),)
+
+obj-m := hello.o
+
+else
+
+#KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+KERNELDIR ?= /usr/src/linux-headers-3.14.0
+
+PWD := $(shell pwd)
+
+all:
+	make -C $(KERNELDIR) M=$(PWD) modules
+
+clean:
+	make -C $(KERNELDIR) M=$(PWD) clean
+
+
+endif

study/driver/hello_proc/hello.c

@@ -0,0 +1,43 @@
+#include <linux/module.h>
+#include <linux/init.h>
+
+MODULE_LICENSE("Dual BSD/GPL");
+
+/*
+ * print the module information
+ */
+static void print_module(void)
+{
+    struct module *mod;
+
+    printk(KERN_ALERT "this module: %p==%p\n", &__this_module, THIS_MODULE);
+    printk(KERN_ALERT "module state: %d\n", THIS_MODULE->state);
+    printk(KERN_ALERT "module name: %s\n", THIS_MODULE->name);
+
+    list_for_each_entry(mod, *(&THIS_MODULE->list.prev), list);
+    printk(KERN_ALERT "module name: %s\n", mod->name);
+    printk(KERN_ALERT "module state: %d\n", THIS_MODULE->state);
+}
+
+
+static int hello_init(void)
+{
+    print_module( );
+
+    printk(KERN_ALERT "run in cpu %d\n", get_cpu());
+
+    printk(KERN_ALERT "PAGE_OFFSET : 0x%lx, TASK_SIZE : 0x%lx", PAGE_OFFSET, TASK_SIZE);
+
+
+    return 0;
+}
+
+
+
+static void hello_exit(void)
+{
+}
+
+
+module_init(hello_init);
+module_exit(hello_exit);

study/driver/hello_proc/hello.mod.c

@@ -0,0 +1,28 @@
+#include <linux/module.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+
+__visible struct module __this_module
+__attribute__((section(".gnu.linkonce.this_module"))) = {
+	.name = KBUILD_MODNAME,
+	.init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+	.exit = cleanup_module,
+#endif
+	.arch = MODULE_ARCH_INIT,
+};
+
+static const struct modversion_info ____versions[]
+__used
+__attribute__((section("__versions"))) = {
+	{ 0x846a1dd9, __VMLINUX_SYMBOL_STR(module_layout) },
+	{ 0x27e1a049, __VMLINUX_SYMBOL_STR(printk) },
+};
+
+static const char __module_depends[]
+__used
+__attribute__((section(".modinfo"))) =
+"depends=";
+

study/driver/hello_proc/modules.order

@@ -0,0 +1 @@
+kernel//home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/driver/hello/hello.ko