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# vfork _______________________________________________________
#
# SYSCALL_DEFINE0(vfork)
#
@define _SYSCALL_VFORK_NAME
%(
name = "vfork"
%)
@define _SYSCALL_VFORK_ARGSTR
%(
argstr = ""
%)
probe syscall.vfork = dw_syscall.vfork !, nd_syscall.vfork ? {}
probe syscall.vfork.return = dw_syscall.vfork.return !,
nd_syscall.vfork.return ? {}
# dw_vfork _____________________________________________________
probe dw_syscall.vfork = kernel.function("sys_vfork").call ?
{
@_SYSCALL_VFORK_NAME
@_SYSCALL_VFORK_ARGSTR
}
probe dw_syscall.vfork.return = kernel.function("sys_vfork").return ?
{
@_SYSCALL_VFORK_NAME
@SYSC_RETVALSTR($return)
}
# nd_vfork _____________________________________________________
probe nd_syscall.vfork = nd1_syscall.vfork!, nd2_syscall.vfork!, tp_syscall.vfork
{ }
probe nd1_syscall.vfork = kprobe.function("sys_vfork").call ?
{
@_SYSCALL_VFORK_NAME
@_SYSCALL_VFORK_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.vfork = kprobe.function(@arch_syscall0_prefix "sys_vfork") ?
{
@_SYSCALL_VFORK_NAME
@_SYSCALL_VFORK_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.vfork = kernel.trace("sys_enter") ?
{
@__syscall_compat_gate(@const("__NR_vfork"), @const("__NR_compat_vfork"))
@_SYSCALL_VFORK_NAME
@_SYSCALL_VFORK_ARGSTR
}
probe nd_syscall.vfork.return = nd1_syscall.vfork.return!, nd2_syscall.vfork.return!, tp_syscall.vfork.return
{ }
probe nd1_syscall.vfork.return = kprobe.function("sys_vfork").return ?
{
@_SYSCALL_VFORK_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.vfork.return = kprobe.function(@arch_syscall0_prefix "sys_vfork").return ?
{
@_SYSCALL_VFORK_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.vfork.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_vfork"), @const("__NR_compat_vfork"))
@_SYSCALL_VFORK_NAME
@SYSC_RETVALSTR($ret)
}
|
