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Filename : sysc_set_mempolicy.stp
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# set_mempolicy ______________________________________________
# long sys_set_mempolicy(int mode,
#	unsigned long __user *nmask,
#	unsigned long maxnode)
#

@define _SYSCALL_SET_MEMPOLICY_NAME
%(
	name = "set_mempolicy"
%)

@define _SYSCALL_SET_MEMPOLICY_ARGSTR
%(
	argstr = sprintf("%s, %p, %u", mode_str, nmask_uaddr, maxnode)
%)

@define _SYSCALL_SET_MEMPOLICY_REGARGS
%(
	mode = int_arg(1)
	mode_str = _mempolicy_mode_str(mode)
	nmask_uaddr = pointer_arg(2)
	maxnode = ulong_arg(3)
%)

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

# dw_set_mempolicy _____________________________________________________

probe dw_syscall.set_mempolicy = __syscall.set_mempolicy ?,
	kernel.function("compat_sys_set_mempolicy").call ?
{
	@_SYSCALL_SET_MEMPOLICY_NAME
	mode = __int32($mode)
	mode_str = _mempolicy_mode_str(__int32($mode))
	nmask_uaddr = $nmask
	maxnode = $maxnode
	@_SYSCALL_SET_MEMPOLICY_ARGSTR
}
probe __syscall.set_mempolicy = kernel.function("sys_set_mempolicy") ?
{
%( arch == "powerpc" %?
	@__syscall_gate_compat_simple
%)
}
probe dw_syscall.set_mempolicy.return = __syscall.set_mempolicy.return ?,
	kernel.function("compat_sys_set_mempolicy").return ?
{
	@_SYSCALL_SET_MEMPOLICY_NAME
	@SYSC_RETVALSTR($return)
}
probe __syscall.set_mempolicy.return =
	kernel.function("sys_set_mempolicy").return ?
{
%( arch == "powerpc" %?
	@__syscall_gate_compat_simple
%)
}

# nd_set_mempolicy _____________________________________________________

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

probe nd1_syscall.set_mempolicy = __nd1_syscall.set_mempolicy ?,
	kprobe.function("compat_sys_set_mempolicy") ?
{
	@_SYSCALL_SET_MEMPOLICY_NAME
	asmlinkage()
	@_SYSCALL_SET_MEMPOLICY_REGARGS
	@_SYSCALL_SET_MEMPOLICY_ARGSTR
}
probe __nd1_syscall.set_mempolicy = kprobe.function("sys_set_mempolicy") ?
{
%( arch == "powerpc" %?
	asmlinkage()
	@__syscall_gate_compat_simple
%)
}

/* kernel 4.17+ */
probe nd2_syscall.set_mempolicy = kprobe.function(@arch_syscall_prefix "sys_set_mempolicy") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_SET_MEMPOLICY_NAME
	@_SYSCALL_SET_MEMPOLICY_REGARGS
	@_SYSCALL_SET_MEMPOLICY_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.set_mempolicy = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_set_mempolicy"), @const("__NR_compat_set_mempolicy"))
	@_SYSCALL_SET_MEMPOLICY_NAME
	@_SYSCALL_SET_MEMPOLICY_REGARGS
	@_SYSCALL_SET_MEMPOLICY_ARGSTR
}

probe nd_syscall.set_mempolicy.return = nd1_syscall.set_mempolicy.return!, nd2_syscall.set_mempolicy.return!, tp_syscall.set_mempolicy.return
  { }
  
probe nd1_syscall.set_mempolicy.return = __nd1_syscall.set_mempolicy.return ?,
	kprobe.function("compat_sys_set_mempolicy").return ?
{
	@_SYSCALL_SET_MEMPOLICY_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.set_mempolicy.return =
	kprobe.function("sys_set_mempolicy").return ?
{
%( arch == "powerpc" %?
	asmlinkage()
	@__syscall_gate_compat_simple
%)
}

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