内核同步机制,,,

2026-09-22 12:43:39 +08:00 · 2017-05-09 23:49:47 +08:00
parent 624727cffd
commit 6035cdb0a3
2 changed files with 130 additions and 0 deletions
@@ -0,0 +1,80 @@
+# ------------------------------------------------------------------------------
+#
+# 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
+#MODCFLAGS:=-O2 -Wall -DMODULE -D__KERNEL__ -DLINUX -std=c99
+#EXTRA_CFLAGS  += $(MODULE_FLAGS) $(CFG_INC) $(CFG_INC)
+
+
+
+ifneq ($(KERNELRELEASE),) 	# kernelspace
+
+obj-m := $(MODULE_NAME).o
+
+else						# userspace
+
+
+CURRENT_PATH ?= $(shell pwd)
+LINUX_KERNEL ?= $(shell uname -r)
+LINUX_KERNEL_PATH ?= /lib/modules/$(LINUX_KERNEL)/build
+
+CURRENT_PATH := $(shell pwd)
+
+modules:
+	make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) modules
+
+modules_install:
+	make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) 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 $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) clean
+	rm -f modules.order Module.symvers Module.markers
+
+.PHNOY:
+	modules modules_install clean
+
+
+
+endif
+
@@ -0,0 +1,50 @@
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/atomic.h>
+//#include <linux/list.h>
+//#include <linux/mm.h>
+//#include <linux/mm_types.h>
+
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Gatieme");
+MODULE_DESCRIPTION("test atomic_t");
+
+
+atomic_t count = ATOMIC_INIT(1);
+
+static int hello_init(void)
+{
+    printk("init : %d\n", atomic_read(count));
+
+    atomic_set(count, 2);
+    printk("set2 : %d\n", atomic_read(count));
+
+    atomic_add(count, 3);
+    printk("add3 : %d\n", atomic_read(count));
+
+    atomic_sub(count);
+    printk("sub3 : %d\n", atomic_read(count));
+
+
+    atomic_inc(count);
+    printk("inc  : %d\n", atomic_read(count));
+
+    atomic_dec(count);
+    printk("dev  : %d\n", atomic_read(count));
+
+    return 0;
+}
+
+
+
+static void hello_exit(void)
+{
+    printk(KERN_ERR"exit");
+}
+
+
+module_init(hello_init);
+module_exit(hello_exit);