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# epoll_wait _________________________________________________
#
# long sys_epoll_wait(int epfd, struct epoll_event __user *events,
# int maxevents, int timeout)
# long compat_sys_epoll_wait(int epfd,
# struct compat_epoll_event __user *events,
# int maxevents, int timeout)
#
@define _SYSCALL_EPOLL_WAIT_NAME
%(
name = "epoll_wait"
%)
@define _SYSCALL_EPOLL_WAIT_ARGSTR
%(
argstr = sprintf("%d, %p, %d, %d", epfd, events_uaddr, maxevents, timeout)
%)
@define _SYSCALL_EPOLL_WAIT_REGARGS
%(
epfd = int_arg(1)
events_uaddr = pointer_arg(2)
maxevents = int_arg(3)
timeout = int_arg(4)
%)
@define _SYSCALL_EPOLL_WAIT_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)
%)
probe syscall.epoll_wait = dw_syscall.epoll_wait !, nd_syscall.epoll_wait ? {}
probe syscall.epoll_wait.return = dw_syscall.epoll_wait.return !, nd_syscall.epoll_wait.return ? {}
# dw_epoll_wait _____________________________________________________
probe dw_syscall.epoll_wait = kernel.function("compat_sys_epoll_wait").call ?,
__syscall.epoll_wait ?
{
%( arch != "s390" || kernel_v < "3.15" %?
@__syscall_compat_gate(@const("__NR_epoll_wait"),
@const("__NR_compat_epoll_wait"))
%)
@_SYSCALL_EPOLL_WAIT_NAME
epfd = __int32($epfd)
events_uaddr = $events
maxevents = __int32($maxevents)
timeout = __int32($timeout)
@_SYSCALL_EPOLL_WAIT_ARGSTR
}
probe __syscall.epoll_wait = kernel.function("sys_epoll_wait").call ?
{
%( arch == "s390" && kernel_v >= "3.15" %?
# s390 switched from assembly compat wrappers to C-based
# wrappers in kernel 3.15.
@__syscall_gate(@const("__NR_epoll_wait"))
%)
}
probe dw_syscall.epoll_wait.return =
kernel.function("compat_sys_epoll_wait").return ?,
__syscall.epoll_wait.return ?
{
%( arch != "s390" || kernel_v < "3.15" %?
@__syscall_compat_gate(@const("__NR_epoll_wait"),
@const("__NR_compat_epoll_wait"))
%)
@_SYSCALL_EPOLL_WAIT_NAME
@SYSC_RETVALSTR($return)
}
probe __syscall.epoll_wait.return = kernel.function("sys_epoll_wait").return ?
{
%( arch == "s390" && kernel_v >= "3.15" %?
@__syscall_gate(@const("__NR_epoll_wait"))
%)
}
# nd_epoll_wait _____________________________________________________
probe nd_syscall.epoll_wait = nd1_syscall.epoll_wait!, nd2_syscall.epoll_wait!, tp_syscall.epoll_wait
{ }
probe nd1_syscall.epoll_wait = kprobe.function("compat_sys_epoll_wait") ?,
__nd1_syscall.epoll_wait ?
{
%( arch != "s390" || kernel_v < "3.15" %?
@__syscall_compat_gate(@const("__NR_epoll_wait"),
@const("__NR_compat_epoll_wait"))
%)
@_SYSCALL_EPOLL_WAIT_NAME
asmlinkage()
@_SYSCALL_EPOLL_WAIT_REGARGS
@_SYSCALL_EPOLL_WAIT_ARGSTR
}
probe __nd1_syscall.epoll_wait = kprobe.function("sys_epoll_wait") ?
{
%( arch == "s390" && kernel_v >= "3.15" %?
@__syscall_gate(@const("__NR_epoll_wait"))
%)
}
/* kernel 4.17+ */
probe nd2_syscall.epoll_wait = kprobe.function(@arch_syscall_prefix "sys_epoll_wait") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_EPOLL_WAIT_NAME
@_SYSCALL_EPOLL_WAIT_REGARGS
@_SYSCALL_EPOLL_WAIT_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_EPOLL_WAIT_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.epoll_wait = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_epoll_wait"), @const("__NR_compat_epoll_wait"))
@_SYSCALL_EPOLL_WAIT_NAME
@_SYSCALL_EPOLL_WAIT_REGARGS
@_SYSCALL_EPOLL_WAIT_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_EPOLL_WAIT_REGARGS_STORE %)
}
probe nd_syscall.epoll_wait.return = nd1_syscall.epoll_wait.return!, nd2_syscall.epoll_wait.return!, tp_syscall.epoll_wait.return
{ }
probe nd1_syscall.epoll_wait.return =
kprobe.function("compat_sys_epoll_wait").return ?,
__nd1_syscall.epoll_wait.return ?
{
%( arch != "s390" || kernel_v < "3.15" %?
@__syscall_compat_gate(@const("__NR_epoll_wait"),
@const("__NR_compat_epoll_wait"))
%)
@_SYSCALL_EPOLL_WAIT_NAME
@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.epoll_wait.return =
kprobe.function("sys_epoll_wait").return ?
{
%( arch == "s390" && kernel_v >= "3.15" %?
@__syscall_gate(@const("__NR_epoll_wait"))
%)
}
/* kernel 4.17+ */
probe nd2_syscall.epoll_wait.return = kprobe.function(@arch_syscall_prefix "sys_epoll_wait").return ?
{
@_SYSCALL_EPOLL_WAIT_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.epoll_wait.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_epoll_wait"), @const("__NR_compat_epoll_wait"))
@_SYSCALL_EPOLL_WAIT_NAME
@SYSC_RETVALSTR($ret)
}
|
