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# poll _______________________________________________________
#
# long sys_poll(struct pollfd __user * ufds, unsigned int nfds, int timeout)
#
@define _SYSCALL_POLL_NAME
%(
name = "poll"
%)
@define _SYSCALL_POLL_ARGSTR
%(
argstr = sprintf("%p, %u, %d", ufds_uaddr, nfds, timeout)
%)
@define _SYSCALL_POLL_REGARGS
%(
ufds_uaddr = pointer_arg(1)
nfds = uint_arg(2)
timeout = int_arg(3)
%)
@define _SYSCALL_POLL_REGARGS_STORE
%(
if (@probewrite(ufds_uaddr))
set_pointer_arg(1, ufds_uaddr)
if (@probewrite(nfds))
set_uint_arg(2, nfds)
if (@probewrite(timeout))
set_int_arg(3, timeout)
%)
probe syscall.poll = dw_syscall.poll !, nd_syscall.poll ? {}
probe syscall.poll.return = dw_syscall.poll.return !, nd_syscall.poll.return ? {}
# dw_poll _____________________________________________________
probe dw_syscall.poll = kernel.function("sys_poll").call
{
@_SYSCALL_POLL_NAME
ufds_uaddr = $ufds
nfds = __uint32($nfds)
timeout = __int32(@choose_defined($timeout_msecs, $timeout))
@_SYSCALL_POLL_ARGSTR
}
probe dw_syscall.poll.return = kernel.function("sys_poll").return
{
@_SYSCALL_POLL_NAME
@SYSC_RETVALSTR($return)
}
# nd_poll _____________________________________________________
probe nd_syscall.poll = nd1_syscall.poll!, nd2_syscall.poll!, tp_syscall.poll
{ }
probe nd1_syscall.poll = kprobe.function("sys_poll") ?
{
@_SYSCALL_POLL_NAME
asmlinkage()
@_SYSCALL_POLL_REGARGS
@_SYSCALL_POLL_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.poll = kprobe.function(@arch_syscall_prefix "sys_poll") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_POLL_NAME
@_SYSCALL_POLL_REGARGS
@_SYSCALL_POLL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_POLL_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.poll = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_poll"), @const("__NR_compat_poll"))
@_SYSCALL_POLL_NAME
@_SYSCALL_POLL_REGARGS
@_SYSCALL_POLL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_POLL_REGARGS_STORE %)
}
probe nd_syscall.poll.return = nd1_syscall.poll.return!, nd2_syscall.poll.return!, tp_syscall.poll.return
{ }
probe nd1_syscall.poll.return = kprobe.function("sys_poll").return ?
{
@_SYSCALL_POLL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.poll.return = kprobe.function(@arch_syscall_prefix "sys_poll").return ?
{
@_SYSCALL_POLL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.poll.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_poll"), @const("__NR_compat_poll"))
@_SYSCALL_POLL_NAME
@SYSC_RETVALSTR($ret)
}
|
