测试的proc_test驱动包括只读proc_entry, 只写proc_entry和可读写proc_entry...

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

@@ -1,2 +0,0 @@
-/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

@@ -1,19 +1,78 @@
-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
+# ------------------------------------------------------------------------------
+#
+# 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)
+
+#	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 := hello
+
+ifneq ($(KERNELRELEASE),)
+
+#CFG_FLAGS += -O2  -I./
+#EXTRA_CFLAGS  += $(C_FLAGS) $(CFG_INC) $(CFG_INC)
+
+
+
+obj-m := $(MODULE_NAME).o #print_vmarea.o
+
+else
+
+KERNELDIR ?= /lib/modules/$(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
+

study/driver/hello_proc/hello.c

@@ -1,43 +1,76 @@
-#include <linux/module.h>
-#include <linux/init.h>
+/*
+ * "Hello, world!" minimal kernel module - /proc version
+ *
+ * Valerie Henson <val@nmt.edu>
+ *
+ */
 
-MODULE_LICENSE("Dual BSD/GPL");
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
 
 /*
- * print the module information
+ * Write "Hello, world!" to the buffer passed through the /proc file.
  */
-static void print_module(void)
+
+static int
+hello_read_proc(char *buffer, char **start, off_t offset, int size, int *eof,
+        void *data)
 {
-    struct module *mod;
+    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 (size < 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 (offset != 0)
+        return 0;
+    /*
+     * We know the buffer is big enough to hold the string.
+     */
+    strcpy(buffer, hello_str);
+    /*
+     * Signal EOF.
+     */
+    *eof = 1;
 
-    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);
+    return len;
 
-    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)
+static int __init
+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);
-
+    /*
+     * Create an entry in /proc named "hello_world" that calls
+     * hello_read_proc() when the file is read.
+     */
+    if (create_proc_read_entry("hello_world", 0, NULL, hello_read_proc,
+                    NULL) == 0) {
+        printk(KERN_ERR
+               "Unable to register \"Hello, world!\" proc file\n");
+        return -ENOMEM;
+    }
 
     return 0;
 }
 
+module_init(hello_init);
 
-
-static void hello_exit(void)
+static void __exit
+hello_exit(void)
 {
+    remove_proc_entry("hello_world", NULL);
 }
 
-
-module_init(hello_init);
 module_exit(hello_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Valerie Henson <val@nmt.edu>");
+MODULE_DESCRIPTION("\"Hello, world!\" minimal module");
+MODULE_VERSION("proc");