Getting call stack of interrupted task at interrupt handler

proy_ · 06-16-2018, 08:22 PM

I am writing a PCI device driver in LKM. At the PCI interrupt handler, I want to access and/or print the stack frames of the interrupted task. What functions should I call to get the stack pointer and the stack frames?

rtmistler · 06-18-2018, 06:55 AM

It depends on language and processor.

I'd assume C or C++ and probably x86, but it could be ARM or other.

Have you just web searched for how to print out the current stack pointer in C or C++? There are very many opinions or discussions covering that. Personally I'd try a few of them, but also run under a debugger like GDB and then examine the stack pointer directly in the debugger to verify I'd gotten it correctly.