Name

syscall_get_nr — find what system call a task is executing

Synopsis

long syscall_get_nr (struct task_struct * task,
 struct pt_regs * regs);
 

Arguments

task

task of interest, must be blocked

regs

task_pt_regs of task

Description

If task is executing a system call or is at system call tracing about to attempt one, returns the system call number. If task is not executing a system call, i.e. it's blocked inside the kernel for a fault or signal, returns -1.

It's only valid to call this when task is known to be blocked.