^^&&^^

Edit File: sysc_sched_setaffinity.stp

# sched_setaffinity __________________________________________
# long sys_sched_setaffinity(pid_t pid,
#	unsigned int len,
#	unsigned long __user *user_mask_ptr)
#

@define _SYSCALL_SCHED_SETAFFINITY_NAME
%(
	name = "sched_setaffinity"
%)

@define _SYSCALL_SCHED_SETAFFINITY_ARGSTR
%(
	argstr = sprintf("%d, %u, %p", pid, len, mask_uaddr)
%)

@define _SYSCALL_SCHED_SETAFFINITY_REGARGS
%(
	pid = int_arg(1)
	len = uint_arg(2)
	mask_uaddr = pointer_arg(3)
%)

probe syscall.sched_setaffinity = dw_syscall.sched_setaffinity !,
                                  nd_syscall.sched_setaffinity ? {}
probe syscall.sched_setaffinity.return = dw_syscall.sched_setaffinity.return !,
                                         nd_syscall.sched_setaffinity.return ? {}

# dw_sched_setaffinity _____________________________________________________

probe dw_syscall.sched_setaffinity =
	kernel.function("sys_sched_setaffinity").call ?,
	kernel.function("compat_sys_sched_setaffinity").call ?
{
	@_SYSCALL_SCHED_SETAFFINITY_NAME
	pid = __int32($pid)
	len = __uint32(@choose_defined($len, 0))
	mask_uaddr = @__pointer($user_mask_ptr)
	@_SYSCALL_SCHED_SETAFFINITY_ARGSTR
}
probe dw_syscall.sched_setaffinity.return =
	kernel.function("sys_sched_setaffinity").return ?,
	kernel.function("compat_sys_sched_setaffinity").return ?
{
	@_SYSCALL_SCHED_SETAFFINITY_NAME
	@SYSC_RETVALSTR($return)
}

# nd_sched_setaffinity _____________________________________________________

probe nd_syscall.sched_setaffinity = nd1_syscall.sched_setaffinity!, nd2_syscall.sched_setaffinity!, tp_syscall.sched_setaffinity
  { }

probe nd1_syscall.sched_setaffinity =
	kprobe.function("sys_sched_setaffinity") ?,
	kprobe.function("compat_sys_sched_setaffinity") ?
{
	@_SYSCALL_SCHED_SETAFFINITY_NAME
	asmlinkage()
	@_SYSCALL_SCHED_SETAFFINITY_REGARGS
	@_SYSCALL_SCHED_SETAFFINITY_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.sched_setaffinity =
	kprobe.function(@arch_syscall_prefix "sys_sched_setaffinity") ?,
	kprobe.function(@arch_syscall_prefix "compat_sys_sched_setaffinity") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_SCHED_SETAFFINITY_NAME
	@_SYSCALL_SCHED_SETAFFINITY_REGARGS
	@_SYSCALL_SCHED_SETAFFINITY_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sched_setaffinity = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_sched_setaffinity"), @const("__NR_compat_sched_setaffinity"))
	@_SYSCALL_SCHED_SETAFFINITY_NAME
	@_SYSCALL_SCHED_SETAFFINITY_REGARGS
	@_SYSCALL_SCHED_SETAFFINITY_ARGSTR
}

probe nd_syscall.sched_setaffinity.return = nd1_syscall.sched_setaffinity.return!, nd2_syscall.sched_setaffinity.return!, tp_syscall.sched_setaffinity.return
  { }
  
probe nd1_syscall.sched_setaffinity.return =
	kprobe.function("sys_sched_setaffinity").return ?,
	kprobe.function("compat_sys_sched_setaffinity").return ?
{
	@_SYSCALL_SCHED_SETAFFINITY_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.sched_setaffinity.return =
	kprobe.function(@arch_syscall_prefix "sys_sched_setaffinity").return ?,
	kprobe.function(@arch_syscall_prefix "compat_sys_sched_setaffinity").return ?
{
	@_SYSCALL_SCHED_SETAFFINITY_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sched_setaffinity.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_sched_setaffinity"), @const("__NR_compat_sched_setaffinity"))
	@_SYSCALL_SCHED_SETAFFINITY_NAME
	@SYSC_RETVALSTR($ret)
}