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# epoll_pwait _________________________________________________
#
# long sys_epoll_pwait(int epfd, struct epoll_event __user *events,
# int maxevents, int timeout, const sigset_t __user *sigmask,
# size_t sigsetsize)
# long compat_sys_epoll_pwait(int epfd,
# struct compat_epoll_event __user *events,
# int maxevents, int timeout,
# const compat_sigset_t __user *sigmask,
# compat_size_t sigsetsize)
#
@define _SYSCALL_EPOLL_PWAIT_NAME
%(
name = "epoll_pwait"
%)
@define _SYSCALL_EPOLL_PWAIT_ARGSTR
%(
argstr = sprintf("%d, %p, %d, %d, %p, %d", epfd, events_uaddr, maxevents,
timeout, sigmask_uaddr, sigsetsize)
%)
@define _SYSCALL_EPOLL_PWAIT_REGARGS
%(
epfd = int_arg(1)
events_uaddr = pointer_arg(2)
maxevents = int_arg(3)
timeout = int_arg(4)
sigmask_uaddr = pointer_arg(5)
sigsetsize = ulong_arg(6)
%)
@define _SYSCALL_EPOLL_PWAIT_REGARGS_STORE
%(
if (@probewrite(epfd))
set_int_arg(1, epfd)
if (@probewrite(events_uaddr))
set_pointer_arg(2, events_uaddr)
if (@probewrite(maxevents))
set_int_arg(3, maxevents)
if (@probewrite(timeout))
set_int_arg(4, timeout)
if (@probewrite(sigmask_uaddr))
set_pointer_arg(5, sigmask_uaddr)
if (@probewrite(sigsetsize))
set_ulong_arg(6, sigsetsize)
%)
probe syscall.epoll_pwait = dw_syscall.epoll_pwait !, nd_syscall.epoll_pwait ? {}
probe syscall.epoll_pwait.return = dw_syscall.epoll_pwait.return !, nd_syscall.epoll_pwait.return ? {}
# dw_epoll_pwait _____________________________________________________
probe dw_syscall.epoll_pwait = kernel.function("compat_sys_epoll_pwait").call ?,
kernel.function("sys_epoll_pwait").call ?
{
@_SYSCALL_EPOLL_PWAIT_NAME
epfd = __int32($epfd)
events_uaddr = @__pointer($events)
maxevents = __int32($maxevents)
timeout = __int32($timeout)
sigmask_uaddr = @__pointer($sigmask)
sigsetsize = $sigsetsize
@_SYSCALL_EPOLL_PWAIT_ARGSTR
}
probe dw_syscall.epoll_pwait.return = kernel.function("compat_sys_epoll_pwait").return ?,
kernel.function("sys_epoll_pwait").return ?
{
@_SYSCALL_EPOLL_PWAIT_NAME
@SYSC_RETVALSTR($return)
}
# nd_epoll_pwait _____________________________________________________
probe nd_syscall.epoll_pwait = nd1_syscall.epoll_pwait!, nd2_syscall.epoll_pwait!, tp_syscall.epoll_pwait
{ }
probe nd1_syscall.epoll_pwait = kprobe.function("compat_sys_epoll_pwait") ?,
kprobe.function("sys_epoll_pwait") ?
{
@_SYSCALL_EPOLL_PWAIT_NAME
asmlinkage()
@_SYSCALL_EPOLL_PWAIT_REGARGS
@_SYSCALL_EPOLL_PWAIT_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.epoll_pwait = kprobe.function(@arch_syscall_prefix "sys_epoll_pwait") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_EPOLL_PWAIT_NAME
@_SYSCALL_EPOLL_PWAIT_REGARGS
@_SYSCALL_EPOLL_PWAIT_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_EPOLL_PWAIT_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.epoll_pwait = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_epoll_pwait"), @const("__NR_compat_epoll_pwait"))
@_SYSCALL_EPOLL_PWAIT_NAME
@_SYSCALL_EPOLL_PWAIT_REGARGS
@_SYSCALL_EPOLL_PWAIT_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_EPOLL_PWAIT_REGARGS_STORE %)
}
probe nd_syscall.epoll_pwait.return = nd1_syscall.epoll_pwait.return!, nd2_syscall.epoll_pwait.return!, tp_syscall.epoll_pwait.return
{ }
probe nd1_syscall.epoll_pwait.return =
kprobe.function("compat_sys_epoll_pwait").return ?,
kprobe.function("sys_epoll_pwait").return ?
{
@_SYSCALL_EPOLL_PWAIT_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.epoll_pwait.return = kprobe.function(@arch_syscall_prefix "sys_epoll_pwait").return ?
{
@_SYSCALL_EPOLL_PWAIT_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.epoll_pwait.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_epoll_pwait"), @const("__NR_compat_epoll_pwait"))
@_SYSCALL_EPOLL_PWAIT_NAME
@SYSC_RETVALSTR($ret)
}
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