관리-도구

편집 파일: sysc_timerfd_gettime.stp

# timerfd_gettime_____________________________________________
#
# SYSCALL_DEFINE2(timerfd_gettime, int, ufd, struct itimerspec __user *, otmr)
# COMPAT_SYSCALL_DEFINE2(timerfd_gettime, int, ufd,
#		struct compat_itimerspec __user *, otmr)

@define _SYSCALL_TIMERFD_GETTIME_NAME
%(
	name = "timerfd_gettime"
%)

@define _SYSCALL_TIMERFD_GETTIME_ARGSTR
%(
	argstr = sprintf("%d, %p", fd, value_uaddr)
%)

@define _SYSCALL_TIMERFD_GETTIME_REGARGS
%(
	fd = int_arg(1)
	value_uaddr = pointer_arg(2)
%)

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

# dw_timerfd_gettime _____________________________________________________

probe dw_syscall.timerfd_gettime = __syscall.timerfd_gettime ?,
	kernel.function("compat_sys_timerfd_gettime").call ?
{
	@_SYSCALL_TIMERFD_GETTIME_NAME
	fd = __int32($ufd)
	value_uaddr = @__pointer($otmr)
	@_SYSCALL_TIMERFD_GETTIME_ARGSTR
}
probe __syscall.timerfd_gettime = kernel.function("sys_timerfd_gettime").call ?
{
	@__syscall_gate_compat_simple
}
probe dw_syscall.timerfd_gettime.return = __syscall.timerfd_gettime.return ?,
	kernel.function("compat_sys_timerfd_gettime").return ?
{
	@_SYSCALL_TIMERFD_GETTIME_NAME
	@SYSC_RETVALSTR($return)
}
probe __syscall.timerfd_gettime.return =
	kernel.function("sys_timerfd_gettime").return ?
{
	@__syscall_gate_compat_simple
}

# nd_timerfd_gettime _____________________________________________________

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

probe nd1_syscall.timerfd_gettime = __nd1_syscall.timerfd_gettime ?,
	kprobe.function("compat_sys_timerfd_gettime").call ?
{
	@_SYSCALL_TIMERFD_GETTIME_NAME
	asmlinkage()
	@_SYSCALL_TIMERFD_GETTIME_REGARGS
	@_SYSCALL_TIMERFD_GETTIME_ARGSTR
}
probe __nd1_syscall.timerfd_gettime =
	kprobe.function("sys_timerfd_gettime").call ?
{
	@__syscall_gate_compat_simple
}

/* kernel 4.17+ */
probe nd2_syscall.timerfd_gettime =
	kprobe.function(@arch_syscall_prefix "sys_timerfd_gettime") ?,
	kprobe.function(@arch_syscall_prefix "compat_sys_timerfd_gettime") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_TIMERFD_GETTIME_NAME
	@_SYSCALL_TIMERFD_GETTIME_REGARGS
	@_SYSCALL_TIMERFD_GETTIME_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.timerfd_gettime = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_timerfd_gettime"), @const("__NR_compat_timerfd_gettime"))
	@_SYSCALL_TIMERFD_GETTIME_NAME
	@_SYSCALL_TIMERFD_GETTIME_REGARGS
	@_SYSCALL_TIMERFD_GETTIME_ARGSTR
}

probe nd_syscall.timerfd_gettime.return = nd1_syscall.timerfd_gettime.return!, nd2_syscall.timerfd_gettime.return!, tp_syscall.timerfd_gettime.return
  { }

probe nd1_syscall.timerfd_gettime.return = __nd1_syscall.timerfd_gettime.return ?,
	kprobe.function("compat_sys_timerfd_gettime").return ?
{
	@_SYSCALL_TIMERFD_GETTIME_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.timerfd_gettime.return =
	kprobe.function("sys_timerfd_gettime").return ?
{
	@__syscall_gate_compat_simple
}

/* kernel 4.17+ */
probe nd2_syscall.timerfd_gettime.return =
	kprobe.function(@arch_syscall_prefix "sys_timerfd_gettime").return ?,
	kprobe.function(@arch_syscall_prefix "compat_sys_timerfd_gettime").return ?
{
	@_SYSCALL_TIMERFD_GETTIME_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.timerfd_gettime.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_timerfd_gettime"), @const("__NR_compat_timerfd_gettime"))
	@_SYSCALL_TIMERFD_GETTIME_NAME
	@SYSC_RETVALSTR($ret)
}