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Filename : sysc_set_robust_list.stp
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# set_robust_list ____________________________________________
# SYSCALL_DEFINE2(set_robust_list, struct robust_list_head __user *, head,
#                 size_t, len)
# COMPAT_SYSCALL_DEFINE2(set_robust_list,
#                        struct compat_robust_list_head __user *, head,
#                        compat_size_t, len)

@define _SYSCALL_SET_ROBUST_LIST_NAME
%(
	name = "set_robust_list"
%)

@define _SYSCALL_SET_ROBUST_LIST_ARGSTR
%(
	argstr = sprintf("%p, %u", list_head_uaddr, len)
%)

@define _SYSCALL_SET_ROBUST_LIST_REGARGS
%(
	list_head_uaddr = pointer_arg(1)
	len = ulong_arg(2)
%)

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

# dw_set_robust_list _____________________________________________________

probe dw_syscall.set_robust_list = __syscall.set_robust_list ?,
                                kernel.function("compat_sys_set_robust_list") ?
{
	@_SYSCALL_SET_ROBUST_LIST_NAME
	list_head_uaddr = @__pointer($head)
	len = @__compat_ulong($len)
	@_SYSCALL_SET_ROBUST_LIST_ARGSTR
}
probe __syscall.set_robust_list = kernel.function("sys_set_robust_list")
{
	@__syscall_gate_compat_simple
}
probe dw_syscall.set_robust_list.return = __syscall.set_robust_list.return ?,
		kernel.function("compat_sys_set_robust_list").return ?
{
	@_SYSCALL_SET_ROBUST_LIST_NAME
	@SYSC_RETVALSTR($return)
}
probe __syscall.set_robust_list.return =
		kernel.function("sys_set_robust_list").return
{
	@__syscall_gate_compat_simple
}

# nd_set_robust_list _____________________________________________________

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

probe nd1_syscall.set_robust_list =
		__nd1_syscall.set_robust_list ?,
		kprobe.function("compat_sys_set_robust_list") ?
{
	@_SYSCALL_SET_ROBUST_LIST_NAME
	asmlinkage()
	@_SYSCALL_SET_ROBUST_LIST_REGARGS
	@_SYSCALL_SET_ROBUST_LIST_ARGSTR
}
probe __nd1_syscall.set_robust_list = kprobe.function("sys_set_robust_list")
{
	@__syscall_gate_compat_simple
}

/* kernel 4.17+ */
probe nd2_syscall.set_robust_list =
	kprobe.function(@arch_syscall_prefix "sys_set_robust_list") ?,
	kprobe.function(@arch_syscall_prefix "compat_sys_set_robust_list") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_SET_ROBUST_LIST_NAME
	@_SYSCALL_SET_ROBUST_LIST_REGARGS
	@_SYSCALL_SET_ROBUST_LIST_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.set_robust_list = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_set_robust_list"), @const("__NR_compat_set_robust_list"))
	@_SYSCALL_SET_ROBUST_LIST_NAME
	@_SYSCALL_SET_ROBUST_LIST_REGARGS
	@_SYSCALL_SET_ROBUST_LIST_ARGSTR
}

probe nd_syscall.set_robust_list.return = nd1_syscall.set_robust_list.return!, nd2_syscall.set_robust_list.return!, tp_syscall.set_robust_list.return
  { }
  
probe nd1_syscall.set_robust_list.return =
		__nd1_syscall.set_robust_list.return ?,
		kprobe.function("compat_sys_set_robust_list").return ?
{
	@_SYSCALL_SET_ROBUST_LIST_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.set_robust_list.return =
		kprobe.function("sys_set_robust_list").return
{
	@__syscall_gate_compat_simple
}

/* kernel 4.17+ */
probe nd2_syscall.set_robust_list.return =
	kprobe.function(@arch_syscall_prefix "sys_set_robust_list").return ?,
	kprobe.function(@arch_syscall_prefix "compat_sys_set_robust_list").return ?
{
	@_SYSCALL_SET_ROBUST_LIST_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.set_robust_list.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_set_robust_list"), @const("__NR_compat_set_robust_list"))
	@_SYSCALL_SET_ROBUST_LIST_NAME
	@SYSC_RETVALSTR($ret)
}