^^&&^^

Edit File: sysc_geteuid.stp

# geteuid ____________________________________________________
# long sys_geteuid(void)
# long sys32_geteuid16(void)
#

@define _SYSCALL_GETEUID_NAME
%(
	name = "geteuid"
%)

@define _SYSCALL_GETEUID_ARGSTR
%(
	argstr = ""
%)

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

# dw_geteuid _____________________________________________________

probe dw_syscall.geteuid = kernel.function("sys_geteuid16").call ?,
                        kernel.function("sys32_geteuid16").call ?,
%( arch == "s390" %?
                        kernel.function("compat_sys_s390_geteuid16").call ?,
%)
                        kernel.function("sys_geteuid").call
{
	@_SYSCALL_GETEUID_NAME
	@_SYSCALL_GETEUID_ARGSTR
}
probe dw_syscall.geteuid.return = kernel.function("sys_geteuid16").return ?,
	kernel.function("sys32_geteuid16").return ?,
%( arch == "s390" %?
	kernel.function("compat_sys_s390_geteuid16").return ?,
%)
	kernel.function("sys_geteuid").return
{
	@_SYSCALL_GETEUID_NAME
	@SYSC_RETVALSTR($return)
}

# nd_geteuid _____________________________________________________

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

probe nd1_syscall.geteuid = kprobe.function("sys_geteuid16") ?,
                            kprobe.function("sys32_geteuid16") ?,
%( arch == "s390" %?
                            kprobe.function("compat_sys_s390_geteuid16") ?,
%)
                            kprobe.function("sys_geteuid")
{
	@_SYSCALL_GETEUID_NAME
	@_SYSCALL_GETEUID_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.geteuid = kprobe.function(@arch_syscall0_prefix "sys_geteuid") ?,
                            kprobe.function(@arch_syscall0_prefix "sys_geteuid16") ?
{
	@_SYSCALL_GETEUID_NAME
	@_SYSCALL_GETEUID_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.geteuid = __tp_syscall.geteuid, __tp_syscall.geteuid16
{
	@_SYSCALL_GETEUID_NAME
	@_SYSCALL_GETEUID_ARGSTR
}
probe __tp_syscall.geteuid = kernel.trace("sys_enter")
{
	@__syscall_compat_gate(@const("__NR_geteuid"), @const("__NR_compat_geteuid32"))
}
probe __tp_syscall.geteuid16 = kernel.trace("sys_enter")
{
	@__compat_syscall_gate(@const("__NR_compat_geteuid"))
}

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

probe nd1_syscall.geteuid.return = kprobe.function("sys_geteuid16").return ?,
	kprobe.function("sys32_geteuid16").return ?,
%( arch == "s390" %?
	kprobe.function("compat_sys_s390_geteuid16").return ?,
%)
	kprobe.function("sys_geteuid").return
{
	@_SYSCALL_GETEUID_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.geteuid.return =
	kprobe.function(@arch_syscall0_prefix "sys_geteuid").return ?,
	kprobe.function(@arch_syscall0_prefix "sys_geteuid16").return ?
{
	@_SYSCALL_GETEUID_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.geteuid.return = __tp_syscall.geteuid.return, __tp_syscall.geteuid16.return
{
	__set_syscall_pt_regs($regs)
	@_SYSCALL_GETEUID_NAME
	@SYSC_RETVALSTR($ret)
}
probe __tp_syscall.geteuid.return = kernel.trace("sys_exit")
{
	@__syscall_compat_gate(@const("__NR_geteuid"), @const("__NR_compat_geteuid32"))
}
probe __tp_syscall.geteuid16.return = kernel.trace("sys_exit")
{
	@__compat_syscall_gate(@const("__NR_compat_geteuid"))
}