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# semctl _____________________________________________________
# long sys_semctl (int semid,
# int semnum,
# int cmd,
# union semun arg)
#
@define _SYSCALL_SEMCTL_NAME
%(
name = "semctl"
%)
@define _SYSCALL_SEMCTL_ARGSTR
%(
argstr = sprintf("%d, %d, %s, %p", semid, semnum, cmdstr, arg)
%)
@define _SYSCALL_SEMCTL_REGARGS
%(
semid = int_arg(1)
semnum = int_arg(2)
cmd = int_arg(3)
cmdstr = _semctl_cmd(cmd)
arg = pointer_arg(4)
%)
@define _SYSCALL_IPC_SEMCTL_REGARGS
%(
semid = int_arg(2)
semnum = int_arg(3)
cmd = int_arg(4)
cmdstr = _semctl_cmd(cmd)
arg = pointer_arg(5)
%)
@define _SYSCALL_SEMCTL_REGARGS_STORE
%(
if (@probewrite(semid))
set_int_arg(1, semid)
if (@probewrite(semnum))
set_int_arg(2, semnum)
if (@probewrite(cmd))
set_int_arg(3, cmd)
if (@probewrite(arg))
set_pointer_arg(4, arg)
%)
@define _SYSCALL_IPC_SEMCTL_REGARGS_STORE
%(
if (@probewrite(semid))
set_int_arg(2, semid)
if (@probewrite(semnum))
set_int_arg(3, semnum)
if (@probewrite(cmd))
set_int_arg(4, cmd)
if (@probewrite(arg))
set_pointer_arg(5, arg)
%)
probe syscall.semctl = dw_syscall.semctl !, nd_syscall.semctl ? {}
probe syscall.semctl.return = dw_syscall.semctl.return !,
nd_syscall.semctl.return ? {}
# dw_semctl _____________________________________________________
probe dw_syscall.semctl = kernel.function("sys_semctl").call ?
{
@__syscall_gate_compat_simple
@_SYSCALL_SEMCTL_NAME
semid = __int32($semid)
semnum = __int32($semnum)
cmd = __int32($cmd)
cmdstr = _semctl_cmd($cmd)
arg = @choose_defined($arg->buf, $arg)
@_SYSCALL_SEMCTL_ARGSTR
}
probe dw_syscall.semctl.return = kernel.function("sys_semctl").return ?
{
@__syscall_gate_compat_simple
@_SYSCALL_SEMCTL_NAME
@SYSC_RETVALSTR($return)
}
# nd_semctl _____________________________________________________
probe nd_syscall.semctl = nd1_syscall.semctl!, nd2_syscall.semctl!, tp_syscall.semctl
{ }
probe nd1_syscall.semctl = kprobe.function("sys_semctl") ?
{
@__syscall_gate_compat_simple
@_SYSCALL_SEMCTL_NAME
asmlinkage()
@_SYSCALL_SEMCTL_REGARGS
@_SYSCALL_SEMCTL_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.semctl = kprobe.function(@arch_syscall_prefix "sys_semctl") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_SEMCTL_NAME
@_SYSCALL_SEMCTL_REGARGS
@_SYSCALL_SEMCTL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SEMCTL_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.semctl = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_semctl"))
@_SYSCALL_SEMCTL_NAME
@_SYSCALL_SEMCTL_REGARGS
@_SYSCALL_SEMCTL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SEMCTL_REGARGS_STORE %)
}
probe nd_syscall.semctl.return = nd1_syscall.semctl.return!, nd2_syscall.semctl.return!, tp_syscall.semctl.return
{ }
probe nd1_syscall.semctl.return = kprobe.function("sys_semctl").return ?
{
@__syscall_gate_compat_simple
@_SYSCALL_SEMCTL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.semctl.return = kprobe.function(@arch_syscall_prefix "sys_semctl").return ?
{
@_SYSCALL_SEMCTL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.semctl.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_semctl"))
@_SYSCALL_SEMCTL_NAME
@SYSC_RETVALSTR($ret)
}
# compat_sys_semctl ________________________________________
#
# long compat_sys_semctl(int first, int second, int third, void __user *uptr)
# COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
# COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
# u32, third, compat_uptr_t, ptr, u32, fifth)
#
probe syscall.compat_sys_semctl = dw_syscall.compat_sys_semctl !,
nd_syscall.compat_sys_semctl ? {}
probe syscall.compat_sys_semctl.return = dw_syscall.compat_sys_semctl.return !,
nd_syscall.compat_sys_semctl.return ? {}
# dw_compat_sys_semctl _____________________________________________________
probe dw_syscall.compat_sys_semctl = __syscall.compat_semctl ?,
__syscall.compat_ipc.semctl ?
{
@_SYSCALL_SEMCTL_NAME
cmdstr = _semctl_cmd(cmd)
@_SYSCALL_SEMCTL_ARGSTR
}
probe __syscall.compat_semctl = kernel.function("compat_sys_semctl").call ?
{
@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
semid = __int32(@choose_defined($semid, $first))
semnum = __int32(@choose_defined($semnum, $second))
cmd = __int32(@choose_defined($cmd, $third))
arg = @choose_defined($uptr, $arg)
}
probe __syscall.compat_ipc.semctl = kernel.function("compat_sys_ipc").call ?,
kernel.function("sys32_ipc").call ?
{
if ($call != @const("SEMCTL")) next;
semid = __int32($first)
semnum = __int32($second)
cmd = __int32($third)
arg = $ptr
}
probe dw_syscall.compat_sys_semctl.return = __syscall.compat_semctl.return ?,
__syscall.compat_ipc.semctl.return ?
{
@_SYSCALL_SEMCTL_NAME
@SYSC_RETVALSTR($return)
}
probe __syscall.compat_semctl.return =
kernel.function("compat_sys_semctl").return ?
{
@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
}
probe __syscall.compat_ipc.semctl.return =
kernel.function("compat_sys_ipc").return ?,
kernel.function("sys32_ipc").return ?
{
if (@entry($call) != @const("SEMCTL")) next;
}
# nd_compat_sys_semctl _____________________________________________________
probe nd_syscall.compat_sys_semctl = nd1_syscall.compat_sys_semctl!, nd2_syscall.compat_sys_semctl!, tp_syscall.compat_sys_semctl
{ }
probe nd1_syscall.compat_sys_semctl = __nd1_syscall.compat_semctl ?,
__nd1_syscall.compat_ipc.semctl ?
{
@_SYSCALL_SEMCTL_NAME
@_SYSCALL_SEMCTL_ARGSTR
}
probe __nd1_syscall.compat_semctl = kprobe.function("compat_sys_semctl") ?
{
@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
@_SYSCALL_SEMCTL_REGARGS
}
probe __nd1_syscall.compat_ipc.semctl = kprobe.function("compat_sys_ipc") ?,
kprobe.function("sys32_ipc") ?
{
if (int_arg(1) != @const("SEMCTL")) next;
@_SYSCALL_IPC_SEMCTL_REGARGS
}
/* kernel 4.17+ */
probe nd2_syscall.compat_sys_semctl =
kprobe.function(@arch_syscall_prefix "compat_sys_ipc") ?
{
__set_syscall_pt_regs(pointer_arg(1))
if (int_arg(1) != @const("SEMCTL")) next;
@_SYSCALL_SEMCTL_NAME
@_SYSCALL_IPC_SEMCTL_REGARGS
@_SYSCALL_SEMCTL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_IPC_SEMCTL_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_sys_semctl = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_ipc"))
if (int_arg(1) != @const("SEMCTL")) next;
@_SYSCALL_SEMCTL_NAME
@_SYSCALL_IPC_SEMCTL_REGARGS
@_SYSCALL_SEMCTL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_IPC_SEMCTL_REGARGS_STORE %)
}
probe nd_syscall.compat_sys_semctl.return = nd1_syscall.compat_sys_semctl.return!, nd2_syscall.compat_sys_semctl.return!, tp_syscall.compat_sys_semctl.return
{ }
probe nd1_syscall.compat_sys_semctl.return =
__nd1_syscall.compat_semctl.return ?,
__nd1_syscall.compat_ipc.semctl.return ?
{
@_SYSCALL_SEMCTL_NAME
@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.compat_semctl.return =
kprobe.function("compat_sys_semctl").return ?
{
@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
}
probe __nd1_syscall.compat_ipc.semctl.return =
kprobe.function("compat_sys_ipc").return ?,
kprobe.function("sys32_ipc").return ?
{
if (@entry(int_arg(1)) != @const("SEMCTL")) next;
}
/* kernel 4.17+ */
probe nd2_syscall.compat_sys_semctl.return =
kprobe.function(@arch_syscall_prefix "compat_sys_ipc").return ?
{
__set_syscall_pt_regs(@entry(pointer_arg(1)))
if (int_arg(1) != @const("SEMCTL")) next;
@_SYSCALL_SEMCTL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_sys_semctl.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_ipc"))
if (int_arg(1) != @const("SEMCTL")) next;
@_SYSCALL_SEMCTL_NAME
@SYSC_RETVALSTR($ret)
}