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# tkill ______________________________________________________
#
# asmlinkage long
# sys_tkill(int pid,
# int sig)
#
@define _SYSCALL_TKILL_NAME
%(
name = "tkill"
%)
@define _SYSCALL_TKILL_ARGSTR
%(
argstr = sprintf("%d, %s", pid, sig_str)
%)
@define _SYSCALL_TKILL_REGARGS
%(
pid = int_arg(1)
sig = int_arg(2)
sig_str = _signal_name(sig)
%)
@define _SYSCALL_TKILL_REGARGS_STORE
%(
if (@probewrite(pid))
set_int_arg(1, pid)
if (@probewrite(sig))
set_int_arg(2, sig)
%)
probe syscall.tkill = dw_syscall.tkill !, nd_syscall.tkill ? {}
probe syscall.tkill.return = dw_syscall.tkill.return !,
nd_syscall.tkill.return ? {}
# dw_tkill _____________________________________________________
probe dw_syscall.tkill = kernel.function("sys_tkill").call
{
@_SYSCALL_TKILL_NAME
pid = __int32($pid)
sig = __int32($sig)
sig_str = _signal_name(sig)
@_SYSCALL_TKILL_ARGSTR
}
probe dw_syscall.tkill.return = kernel.function("sys_tkill").return
{
@_SYSCALL_TKILL_NAME
@SYSC_RETVALSTR($return)
}
# nd_tkill _____________________________________________________
probe nd_syscall.tkill = nd1_syscall.tkill!, nd2_syscall.tkill!, tp_syscall.tkill
{ }
probe nd1_syscall.tkill = kprobe.function("sys_tkill") ?
{
@_SYSCALL_TKILL_NAME
asmlinkage()
@_SYSCALL_TKILL_REGARGS
@_SYSCALL_TKILL_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.tkill = kprobe.function(@arch_syscall_prefix "sys_tkill") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_TKILL_NAME
@_SYSCALL_TKILL_REGARGS
@_SYSCALL_TKILL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_TKILL_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.tkill = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_tkill"), @const("__NR_compat_tkill"))
@_SYSCALL_TKILL_NAME
@_SYSCALL_TKILL_REGARGS
@_SYSCALL_TKILL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_TKILL_REGARGS_STORE %)
}
probe nd_syscall.tkill.return = nd1_syscall.tkill.return!, nd2_syscall.tkill.return!, tp_syscall.tkill.return
{ }
probe nd1_syscall.tkill.return = kprobe.function("sys_tkill").return ?
{
@_SYSCALL_TKILL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.tkill.return = kprobe.function(@arch_syscall_prefix "sys_tkill").return ?
{
@_SYSCALL_TKILL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.tkill.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_tkill"), @const("__NR_compat_tkill"))
@_SYSCALL_TKILL_NAME
@SYSC_RETVALSTR($ret)
}
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