Linux driver debugging technology and linux debugging technology

Linux driver debugging technology and linux debugging technology
Zookeeper

For Driver Design, one of the core issues is how to complete debugging. Currently, common driver debugging technologies include:
• Printk)
• Debugger debugging (kgdb)
• Query debugging

1. Use printk properly

# Ifdef PDEBUG
# Define PLOG (fmt, args...) printk (KERN_DEBUG "scull:" fmt, # args)
# Else
# Define PLOG (fmt, args...)/* do nothing */
# Endif

Make the following changes to Makefile:
DEBUG = y
Ifeq ($ (DEBUG), y)
DEBFLAGS =-O2-g-d pdebug // similar to define
Else
DEBFLAGS =-O2
Endif
CFLAGS + = $ (DEBFLAGS)

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