分类: LINUX
2012-10-20 16:59:46
【1】配置Kconfig,添加要调试驱动模块的DDEBUG选项,如
kernel_imx\drivers\mxc\pmic\mc13892\Kconfig
config MXC_PMIC_DEBUG
bool "Support MXC PMIC DEBUG"
depends on MXC_PMIC
【2】配置Makefile,添加编译支持驱动模块 EXTRA_CFLAGS += -DDEBUG ,如
kernel_imx\drivers\mxc\pmic\core\Makefile
ifeq ($(CONFIG_MXC_PMIC_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
endif
【3】配置内核,使支持动态调试
make menuconfig
| | Kernel hacking --->
| | [*] Tracers --->
| | [*] Trace max stack
| | [*] Enable dynamic printk() support
| | Device Drivers --->
| | MXC support drivers --->
| | MXC PMIC support --->
| | [*] Support MXC PMIC DEBUG
【4】重烧内核启动后,改变控制台debug消息显示级别,可以打印printk(DEBUG ...)信息
echo > /proc/sys/kernel/printk "8"
原文:http://blog.csdn.net/yihui8/article/details/6736679