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# epoll_ctl __________________________________________________
#
# long sys_epoll_ctl(int epfd, int op, int fd, struct epoll_event __user *event)
# long compat_sys_epoll_ctl(int epfd, int op, int fd,
# struct compat_epoll_event __user *event)
#
@define _SYSCALL_EPOLL_CTL_NAME
%(
name = "epoll_ctl"
%)
@define _SYSCALL_EPOLL_CTL_ARGSTR
%(
argstr = sprintf("%d, %s, %d, %p", epfd, op_str, fd, event_uaddr)
%)
@define _SYSCALL_GATE
%(
%( arch == "s390" && kernel_v >= "3.15" %?
# s390 switched from assembly compat wrappers to C-based
# wrappers in kernel 3.15.
@__syscall_gate_compat_simple
%)
%)
@define _SYSCALL_EPOLL_CTL_REGARGS
%(
epfd = int_arg(1)
op = int_arg(2)
op_str = _opoll_op_str(op)
fd = int_arg(3)
event_uaddr = pointer_arg(4)
%)
@define _SYSCALL_EPOLL_CTL_REGARGS_STORE
%(
if (@probewrite(epfd))
set_int_arg(1, epfd)
if (@probewrite(op))
set_int_arg(2, op)
if (@probewrite(fd))
set_int_arg(3, fd)
if (@probewrite(event_uaddr))
set_pointer_arg(4, event_uaddr)
%)
probe syscall.epoll_ctl = dw_syscall.epoll_ctl !, nd_syscall.epoll_ctl ? {}
probe syscall.epoll_ctl.return = dw_syscall.epoll_ctl.return !, nd_syscall.epoll_ctl.return ? {}
# dw_epoll_ctl _____________________________________________________
probe dw_syscall.epoll_ctl = kernel.function("compat_sys_epoll_ctl").call ?,
__syscall.epoll_ctl ?
{
@_SYSCALL_EPOLL_CTL_NAME
epfd = __int32($epfd)
op = $op
op_str = _opoll_op_str($op)
fd = __int32($fd)
event_uaddr = @__pointer($event)
@_SYSCALL_EPOLL_CTL_ARGSTR
}
probe __syscall.epoll_ctl = kernel.function("sys_epoll_ctl").call ?
{
@_SYSCALL_GATE
}
probe dw_syscall.epoll_ctl.return =
kernel.function("compat_sys_epoll_ctl").return ?,
__syscall.epoll_ctl.return ?
{
@_SYSCALL_EPOLL_CTL_NAME
@SYSC_RETVALSTR($return)
}
probe __syscall.epoll_ctl.return = kernel.function("sys_epoll_ctl").return ?
{
@_SYSCALL_GATE
}
# nd_epoll_ctl _____________________________________________________
probe nd_syscall.epoll_ctl = nd1_syscall.epoll_ctl!, nd2_syscall.epoll_ctl!, tp_syscall.epoll_ctl
{ }
probe nd1_syscall.epoll_ctl = kprobe.function("compat_sys_epoll_ctl") ?,
__nd1_syscall.epoll_ctl ?
{
@_SYSCALL_EPOLL_CTL_NAME
asmlinkage()
@_SYSCALL_EPOLL_CTL_REGARGS
@_SYSCALL_EPOLL_CTL_ARGSTR
}
probe __nd1_syscall.epoll_ctl = kprobe.function("sys_epoll_ctl") ?
{
@_SYSCALL_GATE
}
/* kernel 4.17+ */
probe nd2_syscall.epoll_ctl = kprobe.function(@arch_syscall_prefix "sys_epoll_ctl") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_EPOLL_CTL_NAME
@_SYSCALL_EPOLL_CTL_REGARGS
@_SYSCALL_EPOLL_CTL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_EPOLL_CTL_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.epoll_ctl = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_epoll_ctl"), @const("__NR_compat_epoll_ctl"))
@_SYSCALL_EPOLL_CTL_NAME
@_SYSCALL_EPOLL_CTL_REGARGS
@_SYSCALL_EPOLL_CTL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_EPOLL_CTL_REGARGS_STORE %)
}
probe nd_syscall.epoll_ctl.return = nd1_syscall.epoll_ctl.return!, nd2_syscall.epoll_ctl.return!, tp_syscall.epoll_ctl.return
{ }
probe nd1_syscall.epoll_ctl.return =
kprobe.function("compat_sys_epoll_ctl").return ?,
__nd1_syscall.epoll_ctl.return ?
{
@_SYSCALL_EPOLL_CTL_NAME
@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.epoll_ctl.return = kprobe.function("sys_epoll_ctl").return ?
{
@_SYSCALL_GATE
}
/* kernel 4.17+ */
probe nd2_syscall.epoll_ctl.return = kprobe.function(@arch_syscall_prefix "sys_epoll_ctl").return ?
{
@_SYSCALL_EPOLL_CTL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.epoll_ctl.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_epoll_ctl"), @const("__NR_compat_epoll_ctl"))
@_SYSCALL_EPOLL_CTL_NAME
@SYSC_RETVALSTR($ret)
}
|
