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# setns ______________________________________________________
# SYSCALL_DEFINE2(setns, int, fd, int, nstype)
@define _SYSCALL_SETNS_NAME
%(
name = "setns"
%)
@define _SYSCALL_SETNS_ARGSTR
%(
argstr = sprintf("%d, %s", fd, nstype_str);
%)
@define _SYSCALL_SETNS_REGARGS
%(
fd = int_arg(1)
nstype = int_arg(2)
nstype_str = __fork_flags(nstype)
%)
@define _SYSCALL_SETNS_REGARGS_STORE
%(
if (@probewrite(fd))
set_int_arg(1, fd)
if (@probewrite(nstype))
set_int_arg(2, nstype)
%)
probe syscall.setns = dw_syscall.setns !, nd_syscall.setns ? {}
probe syscall.setns.return = dw_syscall.setns.return !, nd_syscall.setns.return ? {}
# dw_setns _____________________________________________________
probe dw_syscall.setns = kernel.function("sys_setns") ?
{
@_SYSCALL_SETNS_NAME
fd = __int32($fd)
/* Kernel commit 303cc571d107b replaced $nstype with $flags in kernel/nsproxy.c */
nstype = __int32(@choose_defined($nstype, $flags))
nstype_str = __fork_flags(nstype)
@_SYSCALL_SETNS_ARGSTR
}
probe dw_syscall.setns.return = kernel.function("sys_setns").return ?
{
@_SYSCALL_SETNS_NAME
@SYSC_RETVALSTR($return)
}
# nd_setns _____________________________________________________
probe nd_syscall.setns = nd1_syscall.setns!, nd2_syscall.setns!, tp_syscall.setns
{ }
probe nd1_syscall.setns = kprobe.function("sys_setns") ?
{
@_SYSCALL_SETNS_NAME
asmlinkage()
@_SYSCALL_SETNS_REGARGS
@_SYSCALL_SETNS_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.setns = kprobe.function(@arch_syscall_prefix "sys_setns") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_SETNS_NAME
@_SYSCALL_SETNS_REGARGS
@_SYSCALL_SETNS_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SETNS_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setns = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_setns"), @const("__NR_compat_setns"))
@_SYSCALL_SETNS_NAME
@_SYSCALL_SETNS_REGARGS
@_SYSCALL_SETNS_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SETNS_REGARGS_STORE %)
}
probe nd_syscall.setns.return = nd1_syscall.setns.return!, nd2_syscall.setns.return!, tp_syscall.setns.return
{ }
probe nd1_syscall.setns.return = kprobe.function("sys_setns").return ?
{
@_SYSCALL_SETNS_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.setns.return = kprobe.function(@arch_syscall_prefix "sys_setns").return ?
{
@_SYSCALL_SETNS_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setns.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_setns"), @const("__NR_compat_setns"))
@_SYSCALL_SETNS_NAME
@SYSC_RETVALSTR($ret)
}
|
