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# mlock2 _____________________________________________________
#
# long sys_mlock2(unsigned long start, size_t len, int flags)
#

@define _SYSCALL_MLOCK2_NAME
%(
	name = "mlock2"
%)

@define _SYSCALL_MLOCK2_ARGSTR
%(
	argstr = sprintf("%p, %u, %s", addr, len, flags_str)
%)

@define _SYSCALL_MLOCK2_REGARGS
%(
	addr = ulong_arg(1)
	len = ulong_arg(2)
	flags = int_arg(3)
	flags_str = _stp_mlock2_str(flags)
%)

@define _SYSCALL_MLOCK2_REGARGS_STORE
%(
        if (@probewrite(addr))
          set_ulong_arg(1, addr)

	if (@probewrite(len))
	  set_ulong_arg(2, len)

	if (@probewrite(flags))
	  set_int_arg(3, flags)
%)

probe syscall.mlock2 = dw_syscall.mlock2 !, nd_syscall.mlock2 ? {}
probe syscall.mlock2.return = dw_syscall.mlock2.return !, nd_syscall.mlock2.return ? {}

# dw_mlock2 _____________________________________________________

probe dw_syscall.mlock2 = kernel.function("sys_mlock2").call ?
{
	@_SYSCALL_MLOCK2_NAME
	addr = __ulong($start)
	len = __ulong($len)
	flags = __int32($flags)
	flags_str = _stp_mlock2_str(__int32($flags))
	@_SYSCALL_MLOCK2_ARGSTR
}
probe dw_syscall.mlock2.return = kernel.function("sys_mlock2").return ?
{
	@_SYSCALL_MLOCK2_NAME
	@SYSC_RETVALSTR($return)
}

# nd_mlock2 _____________________________________________________

probe nd_syscall.mlock2 = nd1_syscall.mlock2!, nd2_syscall.mlock2!, tp_syscall.mlock2
  { }

probe nd1_syscall.mlock2 = kprobe.function("sys_mlock2") ?
{
	@_SYSCALL_MLOCK2_NAME
	asmlinkage()
	@_SYSCALL_MLOCK2_REGARGS
	@_SYSCALL_MLOCK2_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.mlock2 = kprobe.function(@arch_syscall_prefix "sys_mlock2") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_MLOCK2_NAME
	@_SYSCALL_MLOCK2_REGARGS
	@_SYSCALL_MLOCK2_ARGSTR
},
{
        %( @_IS_SREG_KERNEL %? @_SYSCALL_MLOCK2_REGARGS_STORE %)
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.mlock2 = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_mlock2"), @const("__NR_compat_mlock2"))
	@_SYSCALL_MLOCK2_NAME
	@_SYSCALL_MLOCK2_REGARGS
	@_SYSCALL_MLOCK2_ARGSTR
},
{
        %( @_IS_SREG_KERNEL %? @_SYSCALL_MLOCK2_REGARGS_STORE %)
}

probe nd_syscall.mlock2.return = nd1_syscall.mlock2.return!, nd2_syscall.mlock2.return!, tp_syscall.mlock2.return
  { }
  
probe nd1_syscall.mlock2.return = kprobe.function("sys_mlock2").return ?
{
	@_SYSCALL_MLOCK2_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.mlock2.return = kprobe.function(@arch_syscall_prefix "sys_mlock2").return ?
{
	@_SYSCALL_MLOCK2_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.mlock2.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_mlock2"), @const("__NR_compat_mlock2"))
	@_SYSCALL_MLOCK2_NAME
	@SYSC_RETVALSTR($ret)
}