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# kcmp _______________________________________________________
# SYSCALL_DEFINE5(kcmp, pid_t, pid1, pid_t, pid2, int, type,
# unsigned long, idx1, unsigned long, idx2)
@define _SYSCALL_KCMP_NAME
%(
name = "kcmp"
%)
@define _SYSCALL_KCMP_ARGSTR
%(
argstr = sprintf("%d, %d, %s, %u, %u", pid1, pid2, type_str, idx1, idx2)
%)
@define _SYSCALL_KCMP_REGARGS
%(
pid1 = int_arg(1)
pid2 = int_arg(2)
type = int_arg(3)
type_str = _kcmp_type_str(type)
idx1 = ulong_arg(4)
idx2 = ulong_arg(5)
%)
@define _SYSCALL_KCMP_REGARGS_STORE
%(
if (@probewrite(pid1))
set_int_arg(1, pid1)
if (@probewrite(pid2))
set_int_arg(2, pid2)
if (@probewrite(type))
set_int_arg(3, type)
if (@probewrite(idx1))
set_ulong_arg(4, idx1)
if (@probewrite(idx2))
set_ulong_arg(5, idx2)
%)
probe syscall.kcmp = dw_syscall.kcmp !, nd_syscall.kcmp ? {}
probe syscall.kcmp.return = dw_syscall.kcmp.return !, nd_syscall.kcmp.return ? {}
# dw_kcmp _____________________________________________________
probe dw_syscall.kcmp = kernel.function("sys_kcmp") ?
{
@_SYSCALL_KCMP_NAME
pid1 = __int32($pid1)
pid2 = __int32($pid2)
type = __int32($type)
type_str = _kcmp_type_str(type)
idx1 = @__compat_ulong($idx1)
idx2 = @__compat_ulong($idx2)
@_SYSCALL_KCMP_ARGSTR
}
probe dw_syscall.kcmp.return = kernel.function("sys_kcmp").return ?
{
@_SYSCALL_KCMP_NAME
@SYSC_RETVALSTR($return)
}
# nd_kcmp _____________________________________________________
probe nd_syscall.kcmp = nd1_syscall.kcmp!, nd2_syscall.kcmp!, tp_syscall.kcmp
{ }
probe nd1_syscall.kcmp = kprobe.function("sys_kcmp") ?
{
@_SYSCALL_KCMP_NAME
@_SYSCALL_KCMP_REGARGS
@_SYSCALL_KCMP_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.kcmp = kprobe.function(@arch_syscall_prefix "sys_kcmp") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_KCMP_NAME
@_SYSCALL_KCMP_REGARGS
@_SYSCALL_KCMP_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_KCMP_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.kcmp = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_kcmp"), @const("__NR_compat_kcmp"))
@_SYSCALL_KCMP_NAME
@_SYSCALL_KCMP_REGARGS
@_SYSCALL_KCMP_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_KCMP_REGARGS_STORE %)
}
probe nd_syscall.kcmp.return = nd1_syscall.kcmp.return!, nd2_syscall.kcmp.return!, tp_syscall.kcmp.return
{ }
probe nd1_syscall.kcmp.return = kprobe.function("sys_kcmp").return ?
{
@_SYSCALL_KCMP_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.kcmp.return = kprobe.function(@arch_syscall_prefix "sys_kcmp").return ?
{
@_SYSCALL_KCMP_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.kcmp.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_kcmp"), @const("__NR_compat_kcmp"))
@_SYSCALL_KCMP_NAME
@SYSC_RETVALSTR($ret)
}
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