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# futex ______________________________________________________
# long sys_futex(u32 __user *uaddr,
# int op,
# int val,
# struct timespec __user *utime,
# u32 __user *uaddr2,
# int val3)
# long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
# struct compat_timespec __user *utime, u32 __user *uaddr2,
# u32 val3)
#
@define _SYSCALL_FUTEX_NAME
%(
name = "futex"
%)
@define _SYSCALL_FUTEX_REGARGS
%(
futex_uaddr = pointer_arg(1)
op = int_arg(2)
val = int_arg(3)
utime_uaddr = pointer_arg(4)
uaddr2_uaddr = pointer_arg(5)
val3 = int_arg(6)
%)
@define _SYSCALL_FUTEX_REGARGS_STORE
%(
if (@probewrite(futex_uaddr))
set_pointer_arg(1, futex_uaddr)
if (@probewrite(op))
set_int_arg(2, op)
if (@probewrite(val))
set_int_arg(3, val)
if (@probewrite(utime_uaddr))
set_pointer_arg(4, utime_uaddr)
if (@probewrite(uaddr2_uaddr))
set_pointer_arg(5, uaddr2_uaddr)
if (@probewrite(val3))
set_int_arg(6, val3)
%)
probe syscall.futex = dw_syscall.futex !, nd_syscall.futex ? {}
probe syscall.futex.return = dw_syscall.futex.return !,
nd_syscall.futex.return ? {}
probe syscall.compat_futex = dw_syscall.compat_futex !,
nd_syscall.compat_futex ? {}
probe syscall.compat_futex.return = dw_syscall.compat_futex.return !,
nd_syscall.compat_futex.return ? {}
# dw_futex _____________________________________________________
probe dw_syscall.futex = kernel.function("sys_futex").call ?
{
@_SYSCALL_FUTEX_NAME
futex_uaddr = $uaddr
op = __int32($op)
val = __int32($val)
utime_uaddr = $utime
uaddr2_uaddr = $uaddr2
val3 = __int32($val3)
@__futex_argstr(futex_uaddr, op, val, utime_uaddr, uaddr2_uaddr, val3)
}
probe dw_syscall.futex.return = kernel.function("sys_futex").return ?
{
@_SYSCALL_FUTEX_NAME
@SYSC_RETVALSTR($return)
}
probe dw_syscall.compat_futex = kernel.function("compat_sys_futex").call ?
{
@_SYSCALL_FUTEX_NAME
futex_uaddr = @__pointer($uaddr)
op = __int32($op)
val = __int32($val)
utime_uaddr = @__pointer($utime)
uaddr2_uaddr = $uaddr2
val3 = __int32($val3)
@__futex_argstr(futex_uaddr, op, val, utime_uaddr, uaddr2_uaddr, val3)
}
probe dw_syscall.compat_futex.return =
kernel.function("compat_sys_futex").return ?
{
@_SYSCALL_FUTEX_NAME
@SYSC_RETVALSTR($return)
}
# nd_futex _____________________________________________________
probe nd_syscall.futex = nd1_syscall.futex!, nd2_syscall.futex!, tp_syscall.futex
{ }
probe nd1_syscall.futex = kprobe.function("sys_futex") ?
{
@_SYSCALL_FUTEX_NAME
asmlinkage()
@_SYSCALL_FUTEX_REGARGS
@__futex_argstr(futex_uaddr, op, val, utime_uaddr, uaddr2_uaddr, val3)
}
/* kernel 4.17+ */
probe nd2_syscall.futex = kprobe.function(@arch_syscall_prefix "sys_futex") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_FUTEX_NAME
@_SYSCALL_FUTEX_REGARGS
@__futex_argstr(futex_uaddr, op, val, utime_uaddr, uaddr2_uaddr, val3)
},
{
@_SYSCALL_FUTEX_REGARGS_STORE
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.futex = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_futex"))
@_SYSCALL_FUTEX_NAME
@_SYSCALL_FUTEX_REGARGS
@__futex_argstr(futex_uaddr, op, val, utime_uaddr, uaddr2_uaddr, val3)
},
{
@_SYSCALL_FUTEX_REGARGS_STORE
}
probe nd_syscall.futex.return = nd1_syscall.futex.return!, nd2_syscall.futex.return!, tp_syscall.futex.return
{ }
probe nd1_syscall.futex.return = kprobe.function("sys_futex").return ?
{
@_SYSCALL_FUTEX_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.futex.return = kprobe.function(@arch_syscall_prefix "sys_futex").return ?
{
@_SYSCALL_FUTEX_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.futex.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_futex"))
@_SYSCALL_FUTEX_NAME
@SYSC_RETVALSTR($ret)
}
probe nd_syscall.compat_futex = nd1_syscall.compat_futex!, nd2_syscall.compat_futex!, tp_syscall.compat_futex
{ }
probe nd1_syscall.compat_futex = kprobe.function("compat_sys_futex") ?
{
@_SYSCALL_FUTEX_NAME
asmlinkage()
@_SYSCALL_FUTEX_REGARGS
@__futex_argstr(futex_uaddr, op, val, utime_uaddr, uaddr2_uaddr, val3)
}
/* kernel 4.17+ */
probe nd2_syscall.compat_futex = kprobe.function(@arch_syscall_prefix "compat_sys_futex") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_FUTEX_NAME
@_SYSCALL_FUTEX_REGARGS
@__futex_argstr(futex_uaddr, op, val, utime_uaddr, uaddr2_uaddr, val3)
},
{
@_SYSCALL_FUTEX_REGARGS_STORE
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_futex = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_futex"))
@_SYSCALL_FUTEX_NAME
@_SYSCALL_FUTEX_REGARGS
@__futex_argstr(futex_uaddr, op, val, utime_uaddr, uaddr2_uaddr, val3)
},
{
@_SYSCALL_FUTEX_REGARGS_STORE
}
probe nd_syscall.compat_futex.return = nd1_syscall.compat_futex.return!, nd2_syscall.compat_futex.return!, tp_syscall.compat_futex.return
{ }
probe nd1_syscall.compat_futex.return =
kprobe.function("compat_sys_futex").return ?
{
@_SYSCALL_FUTEX_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.compat_futex.return =
kprobe.function(@arch_syscall_prefix "compat_sys_futex").return ?
{
@_SYSCALL_FUTEX_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_futex.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_futex"))
@_SYSCALL_FUTEX_NAME
@SYSC_RETVALSTR($ret)
}
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