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# sysctl _____________________________________________________
#
# long sys_sysctl(struct __sysctl_args __user *args)
#
@define _SYSCALL_SYSCTL_NAME
%(
name = "sysctl"
%)
@define _SYSCALL_SYSCTL_ARGSTR
%(
argstr = sprintf("%p", args)
%)
@define _SYSCALL_SYSCTL_REGARGS
%(
args = pointer_arg(1)
%)
probe syscall.sysctl = dw_syscall.sysctl !, nd_syscall.sysctl ? {}
probe syscall.sysctl.return = dw_syscall.sysctl.return !,
nd_syscall.sysctl.return ? {}
# dw_sysctl _____________________________________________________
probe dw_syscall.sysctl = kernel.function("compat_sys_sysctl").call ?,
kernel.function("sys_sysctl").call ?
{
@_SYSCALL_SYSCTL_NAME
args = $args
@_SYSCALL_SYSCTL_ARGSTR
}
probe dw_syscall.sysctl.return = kernel.function("compat_sys_sysctl").return ?,
kernel.function("sys_sysctl").return ?
{
@_SYSCALL_SYSCTL_NAME
@SYSC_RETVALSTR($return)
}
# nd_sysctl _____________________________________________________
probe nd_syscall.sysctl = nd1_syscall.sysctl!, nd2_syscall.sysctl!, tp_syscall.sysctl
{ }
probe nd1_syscall.sysctl = kprobe.function("compat_sys_sysctl") ?,
kprobe.function("sys_sysctl") ?
{
@_SYSCALL_SYSCTL_NAME
asmlinkage()
@_SYSCALL_SYSCTL_REGARGS
@_SYSCALL_SYSCTL_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.sysctl = kprobe.function(@arch_syscall_prefix "compat_sys_sysctl") ?,
kprobe.function(@arch_syscall_prefix "sys_sysctl") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_SYSCTL_NAME
@_SYSCALL_SYSCTL_REGARGS
@_SYSCALL_SYSCTL_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sysctl = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR__sysctl"), @const("__NR_compat__sysctl"))
@_SYSCALL_SYSCTL_NAME
@_SYSCALL_SYSCTL_REGARGS
@_SYSCALL_SYSCTL_ARGSTR
}
probe nd_syscall.sysctl.return = nd1_syscall.sysctl.return!, nd2_syscall.sysctl.return!, tp_syscall.sysctl.return
{ }
probe nd1_syscall.sysctl.return = kprobe.function("compat_sys_sysctl").return ?,
kprobe.function("sys_sysctl").return ?
{
@_SYSCALL_SYSCTL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.sysctl.return = kprobe.function(@arch_syscall_prefix "compat_sys_sysctl").return ?,
kprobe.function(@arch_syscall_prefix "sys_sysctl").return ?
{
@_SYSCALL_SYSCTL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sysctl.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR__sysctl"), @const("__NR_compat__sysctl"))
@_SYSCALL_SYSCTL_NAME
@SYSC_RETVALSTR($ret)
}
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