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# unshare ____________________________________________________
# new function with 2.6.16
# long sys_unshare(unsigned long unshare_flags)
@define _SYSCALL_UNSHARE_NAME
%(
name = "unshare"
%)
@define _SYSCALL_UNSHARE_ARGSTR
%(
argstr = unshare_flags_str
%)
@define _SYSCALL_UNSHARE_REGARGS
%(
unshare_flags = ulong_arg(1)
unshare_flags_str = __fork_flags(unshare_flags)
%)
probe syscall.unshare = dw_syscall.unshare !, nd_syscall.unshare ? {}
probe syscall.unshare.return = dw_syscall.unshare.return !,
nd_syscall.unshare.return ? {}
# dw_unshare _____________________________________________________
probe dw_syscall.unshare = kernel.function("sys_unshare").call ?
{
@_SYSCALL_UNSHARE_NAME
unshare_flags = $unshare_flags
unshare_flags_str = __fork_flags(unshare_flags)
@_SYSCALL_UNSHARE_ARGSTR
}
probe dw_syscall.unshare.return = kernel.function("sys_unshare").return ?
{
@_SYSCALL_UNSHARE_NAME
@SYSC_RETVALSTR($return)
}
# nd_unshare _____________________________________________________
probe nd_syscall.unshare = nd1_syscall.unshare!, nd2_syscall.unshare!, tp_syscall.unshare
{ }
probe nd1_syscall.unshare = kprobe.function("sys_unshare") ?
{
@_SYSCALL_UNSHARE_NAME
asmlinkage()
@_SYSCALL_UNSHARE_REGARGS
@_SYSCALL_UNSHARE_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.unshare = kprobe.function(@arch_syscall_prefix "sys_unshare") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_UNSHARE_NAME
@_SYSCALL_UNSHARE_REGARGS
@_SYSCALL_UNSHARE_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.unshare = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_unshare"), @const("__NR_compat_unshare"))
@_SYSCALL_UNSHARE_NAME
@_SYSCALL_UNSHARE_REGARGS
@_SYSCALL_UNSHARE_ARGSTR
}
probe nd_syscall.unshare.return = nd1_syscall.unshare.return!, nd2_syscall.unshare.return!, tp_syscall.unshare.return
{ }
probe nd1_syscall.unshare.return = kprobe.function("sys_unshare").return ?
{
@_SYSCALL_UNSHARE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.unshare.return = kprobe.function(@arch_syscall_prefix "sys_unshare").return ?
{
@_SYSCALL_UNSHARE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.unshare.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_unshare"), @const("__NR_compat_unshare"))
@_SYSCALL_UNSHARE_NAME
@SYSC_RETVALSTR($ret)
}
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