1#@!#!123s

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Filename : sysc_settimeofday.stp
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# settimeofday _______________________________________________
#
# long sys_settimeofday(struct timeval __user *tv,
#			struct timezone __user *tz)
#

@define _SYSCALL_SETTIMEOFDAY_NAME
%(
	name = "settimeofday"
%)

@define _SYSCALL_SETTIMEOFDAY_ARGSTR
%(
	argstr = sprintf("%s, %s", tv_str, tz_str)
%)

@define _SYSCALL_SETTIMEOFDAY_REGARGS
%(
	tv_uaddr = pointer_arg(1)
	tz_uaddr = pointer_arg(2)
	tz_str = _struct_timezone_u(tz_uaddr)
%)

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

# dw_settimeofday _____________________________________________________

probe dw_syscall.settimeofday = kernel.function("sys_settimeofday").call
{
	@_SYSCALL_SETTIMEOFDAY_NAME
	tv_uaddr = $tv
	tv_str = _struct_timeval_u(tv_uaddr, 1)
	tz_uaddr = $tz
	tz_str = _struct_timezone_u(tz_uaddr)
	@_SYSCALL_SETTIMEOFDAY_ARGSTR
}
probe dw_syscall.settimeofday.return = kernel.function("sys_settimeofday").return
{
	@_SYSCALL_SETTIMEOFDAY_NAME
	@SYSC_RETVALSTR($return)
}

# nd_settimeofday _____________________________________________________

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

probe nd1_syscall.settimeofday = kprobe.function("sys_settimeofday") ?
{
	@_SYSCALL_SETTIMEOFDAY_NAME
	asmlinkage()
	@_SYSCALL_SETTIMEOFDAY_REGARGS
	tv_str = _struct_timeval_u(tv_uaddr, 1)
	@_SYSCALL_SETTIMEOFDAY_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.settimeofday = kprobe.function(@arch_syscall_prefix "sys_settimeofday") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_SETTIMEOFDAY_NAME
	@_SYSCALL_SETTIMEOFDAY_REGARGS
	tv_str = _struct_timeval_u(tv_uaddr, 1)
	@_SYSCALL_SETTIMEOFDAY_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.settimeofday = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_settimeofday"))
	@_SYSCALL_SETTIMEOFDAY_NAME
	@_SYSCALL_SETTIMEOFDAY_REGARGS
	tv_str = _struct_timeval_u(tv_uaddr, 1)
	@_SYSCALL_SETTIMEOFDAY_ARGSTR
}

probe nd_syscall.settimeofday.return = nd1_syscall.settimeofday.return!, nd2_syscall.settimeofday.return!, tp_syscall.settimeofday.return
  { }
  
probe nd1_syscall.settimeofday.return = kprobe.function("sys_settimeofday").return ?
{
	@_SYSCALL_SETTIMEOFDAY_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.settimeofday.return = kprobe.function(@arch_syscall_prefix "sys_settimeofday").return ?
{
	@_SYSCALL_SETTIMEOFDAY_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.settimeofday.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_settimeofday"))
	@_SYSCALL_SETTIMEOFDAY_NAME
	@SYSC_RETVALSTR($ret)
}

#
# long sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
# long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
#

probe syscall.settimeofday32 = dw_syscall.settimeofday32 !,
                               nd_syscall.settimeofday32 ? {}
probe syscall.settimeofday32.return = dw_syscall.settimeofday32.return !,
                                      nd_syscall.settimeofday32.return ? {}

# dw_settimeofday32 _____________________________________________________

probe dw_syscall.settimeofday32 = kernel.function("sys32_settimeofday").call ?,
                               kernel.function("compat_sys_settimeofday").call ?
{
	@_SYSCALL_SETTIMEOFDAY_NAME
	tv_uaddr = @__pointer($tv)
	tv_str = _struct_compat_timeval_u(tv_uaddr, 1)
	tz_uaddr = @__pointer($tz)
	tz_str = _struct_timezone_u(tz_uaddr)
	@_SYSCALL_SETTIMEOFDAY_ARGSTR
}
probe dw_syscall.settimeofday32.return = kernel.function("sys32_settimeofday").return ?,
                                      kernel.function("compat_sys_settimeofday").return ?
{
	@_SYSCALL_SETTIMEOFDAY_NAME
	@SYSC_RETVALSTR($return)
}

# nd_settimeofday32 _____________________________________________________

probe nd_syscall.settimeofday32 = nd1_syscall.settimeofday32!, nd2_syscall.settimeofday32!, tp_syscall.settimeofday32
  { }

probe nd1_syscall.settimeofday32 = kprobe.function("sys32_settimeofday") ?,
                                   kprobe.function("compat_sys_settimeofday") ?
{
	@_SYSCALL_SETTIMEOFDAY_NAME
	asmlinkage()
	@_SYSCALL_SETTIMEOFDAY_REGARGS
	tv_str = _struct_compat_timeval_u(tv_uaddr, 1)
	@_SYSCALL_SETTIMEOFDAY_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.settimeofday32 = kprobe.function(@arch_syscall_prefix "compat_sys_settimeofday") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_SETTIMEOFDAY_NAME
	@_SYSCALL_SETTIMEOFDAY_REGARGS
	tv_str = _struct_compat_timeval_u(tv_uaddr, 1)
	@_SYSCALL_SETTIMEOFDAY_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.settimeofday32 = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__compat_syscall_gate(@const("__NR_compat_settimeofday"))
	@_SYSCALL_SETTIMEOFDAY_NAME
	@_SYSCALL_SETTIMEOFDAY_REGARGS
	tv_str = _struct_compat_timeval_u(tv_uaddr, 1)
	@_SYSCALL_SETTIMEOFDAY_ARGSTR
}

probe nd_syscall.settimeofday32.return = nd1_syscall.settimeofday32.return!, nd2_syscall.settimeofday32.return!, tp_syscall.settimeofday32.return
  { }
  
probe nd1_syscall.settimeofday32.return = kprobe.function("sys32_settimeofday").return ?,
                                          kprobe.function("compat_sys_settimeofday").return ?
{
	@_SYSCALL_SETTIMEOFDAY_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.settimeofday32.return = kprobe.function(@arch_syscall_prefix "compat_sys_settimeofday").return ?
{
	@_SYSCALL_SETTIMEOFDAY_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.settimeofday32.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__compat_syscall_gate(@const("__NR_compat_settimeofday"))
	@_SYSCALL_SETTIMEOFDAY_NAME
	@SYSC_RETVALSTR($ret)
}