^^&&^^

Edit File: sysc_ioprio_set.stp

# ioprio_set _________________________________________________
# long sys_ioprio_set(int which, int who, int ioprio)
#

@define _SYSCALL_IOPRIO_SET_NAME
%(
	name = "ioprio_set"
%)

@define _SYSCALL_IOPRIO_SET_ARGSTR
%(
	argstr = sprintf("%s, %d, %s", which_str, who, ioprio_str)
%)

@define _SYSCALL_IOPRIO_SET_REGARGS
%(
	which = int_arg(1)
	which_str = _stp_ioprio_which_str(which)
	who = int_arg(2)
	ioprio = int_arg(3)
	ioprio_str = _stp_ioprio_value_str(ioprio)
%)

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

# dw_ioprio_set _____________________________________________________

probe dw_syscall.ioprio_set = kernel.function("sys_ioprio_set").call ?
{
	@_SYSCALL_IOPRIO_SET_NAME
	which = __int32($which)
	which_str = _stp_ioprio_which_str(__int32($which))
	who = __int32($who)
	ioprio = __int32($ioprio)
	ioprio_str = _stp_ioprio_value_str(__int32($ioprio))
	@_SYSCALL_IOPRIO_SET_ARGSTR
}
probe dw_syscall.ioprio_set.return = kernel.function("sys_ioprio_set").return ?
{
	@_SYSCALL_IOPRIO_SET_NAME
	@SYSC_RETVALSTR($return)
}

# nd_ioprio_set _____________________________________________________

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

probe nd1_syscall.ioprio_set = kprobe.function("sys_ioprio_set") ?
{
	@_SYSCALL_IOPRIO_SET_NAME
	asmlinkage()
	@_SYSCALL_IOPRIO_SET_REGARGS
	@_SYSCALL_IOPRIO_SET_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.ioprio_set = kprobe.function(@arch_syscall_prefix "sys_ioprio_set") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_IOPRIO_SET_NAME
	@_SYSCALL_IOPRIO_SET_REGARGS
	@_SYSCALL_IOPRIO_SET_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.ioprio_set = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_ioprio_set"), @const("__NR_compat_ioprio_set"))
	@_SYSCALL_IOPRIO_SET_NAME
	@_SYSCALL_IOPRIO_SET_REGARGS
	@_SYSCALL_IOPRIO_SET_ARGSTR
}

probe nd_syscall.ioprio_set.return = nd1_syscall.ioprio_set.return!, nd2_syscall.ioprio_set.return!, tp_syscall.ioprio_set.return
  { }
  
probe nd1_syscall.ioprio_set.return = kprobe.function("sys_ioprio_set").return ?
{
	@_SYSCALL_IOPRIO_SET_NAME
	@SYSC_RETVALSTR(returnval())
}

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