View debug methods for kernel function calls "original"

Method One,

By printing the function address, you can see where the function is called

For example:

Core.c DRIVERS\PWM

int pwm_config (struct pwm_device *pwm, int duty_ns, int period_ns)

{

if (!PWM | | period_ns = = 0 | | Duty_ns > Period_ns)

Return-einval;

PRINTK ("%s DRIVERS\PWM core.c----(%d) \ r \ n", __func__, __line__);

PRINTK ("pwm->chip->ops->config=%p----(%d) \ r \ n", Pwm->chip->ops->config, __line__);

Return Pwm->chip->ops->config (Pwm->chip, PWM, Duty_ns, Period_ns);

}

The terminal is displayed as follows:

[42.550000] pwm->chip->ops->config=c001b0c0----(378)

You can then

The following directory

Z:\linux-3.6.5

Found in the System.map in

C001B0C0 T Asiu_pwmc_config

It is called this function asiu_pwmc_config

Method Two,

Dump_stack () function

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View debug methods for kernel function calls "original"