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Filename : sysc_sched_get_priority_min.stp
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# sched_get_priority_min _____________________________________
#
# asmlinkage long
# sys_sched_get_priority_min(int policy)
#

@define _SYSCALL_SCHED_GET_PRIORITY_MIN_NAME
%(
	name = "sched_get_priority_min"
%)

@define _SYSCALL_SCHED_GET_PRIORITY_MIN_ARGSTR
%(
	argstr = policy_str
%)

@define _SYSCALL_SCHED_GET_PRIORITY_MIN_REGARGS
%(
	policy = int_arg(1)
	policy_str = _sched_policy_str(policy)
%)

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

# dw_sched_get_priority_min _____________________________________________________

probe dw_syscall.sched_get_priority_min = kernel.function("sys_sched_get_priority_min").call
{
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_NAME
	policy = __int32($policy)
	policy_str = _sched_policy_str(policy)
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_ARGSTR
}
probe dw_syscall.sched_get_priority_min.return = kernel.function("sys_sched_get_priority_min").return
{
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_NAME
	@SYSC_RETVALSTR($return)
}

# nd_sched_get_priority_min _____________________________________________________

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

probe nd1_syscall.sched_get_priority_min = kprobe.function("sys_sched_get_priority_min") ?
{
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_NAME
	asmlinkage()
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_REGARGS
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.sched_get_priority_min = kprobe.function(@arch_syscall_prefix "sys_sched_get_priority_min") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_NAME
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_REGARGS
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sched_get_priority_min = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_sched_get_priority_min"), @const("__NR_compat_sched_get_priority_min"))
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_NAME
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_REGARGS
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_ARGSTR
}

probe nd_syscall.sched_get_priority_min.return = nd1_syscall.sched_get_priority_min.return!, nd2_syscall.sched_get_priority_min.return!, tp_syscall.sched_get_priority_min.return
  { }
  
probe nd1_syscall.sched_get_priority_min.return = kprobe.function("sys_sched_get_priority_min").return ?
{
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.sched_get_priority_min.return = kprobe.function(@arch_syscall_prefix "sys_sched_get_priority_min").return ?
{
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sched_get_priority_min.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_sched_get_priority_min"), @const("__NR_compat_sched_get_priority_min"))
	@_SYSCALL_SCHED_GET_PRIORITY_MIN_NAME
	@SYSC_RETVALSTR($ret)
}