How do I debug a clock interrupt?

wskhe2005

As the question, if 8259A is set up, the interrupt is turned on, and then a jmp $, the question is how to debug the clock interrupt handler?
I searched this question online, no.
I look forward to your confusion! Thanks in advance!

shield

Breakpoints directly at the code

wskhe2005

Are you referring to breaking points in interrupt handlers?

falconwbgjdl

What level of interrupt handler are you talking about?
If you only deal with it in your own program, you can directly set a breakpoint, but if you want to debug the system's interrupt handler, then:

If it is DOS, you can directly access the address where the interrupt handler is located. Under WINDOWS, you must make your debugging code have RING0 level permissions, you can use a virtual drive or WINIO (commonly used), create interrupt descriptors and other methods .

wskhe2005

falconwbgjdl, I was debugging in protected mode ring0, debugging the clock interrupt program, is the hardware interrupt. IDT has been set up, JMP (here), is to wait for the occurrence of a clock interrupt. Can't make a breakpoint!

wskhe2005

shieldreminds me, thank you, why didn’t I expect it?
At the same time, thank you for your kindfalconwbgjdl!

xsteel

windows ring0?