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편집 파일: sysc_msgctl.stp

# msgctl _____________________________________________________
# long sys_msgctl (int msqid, int cmd, struct msqid_ds __user *buf)
#

@define _SYSCALL_MSGCTL_NAME
%(
	name = "msgctl"
%)

@define _SYSCALL_MSGCTL_ARGSTR
%(
	argstr = sprintf("%d, %s, %p", msqid, cmd_str, buf_uaddr)
%)

@define _SYSCALL_MSGCTL_REGARGS
%(
	msqid = int_arg(1)
	cmd = int_arg(2)
	cmd_str = _stp_msgctl_cmd_str(cmd)
	buf_uaddr = pointer_arg(3)
%)

@define _SYSCALL_IPC_MSGCTL_REGARGS
%(
	msqid = int_arg(2)
	cmd = int_arg(3)
	cmd_str = _stp_msgctl_cmd_str(cmd)
	buf_uaddr = pointer_arg(5)
%)

probe syscall.msgctl = dw_syscall.msgctl !, nd_syscall.msgctl ? {}
probe syscall.msgctl.return = dw_syscall.msgctl.return !,
                              nd_syscall.msgctl.return ? {}

# dw_msgctl _____________________________________________________

probe dw_syscall.msgctl = kernel.function("sys_msgctl").call ?
{
	@__syscall_gate2(@const("__NR_msgctl"), @const("__NR_ipc"))
	@_SYSCALL_MSGCTL_NAME
	msqid = __int32($msqid)
	cmd = __int32($cmd)
	cmd_str = _stp_msgctl_cmd_str(__int32($cmd))
	buf_uaddr = $buf
	@_SYSCALL_MSGCTL_ARGSTR
}
probe dw_syscall.msgctl.return = kernel.function("sys_msgctl").return ?
{
	@__syscall_gate2(@const("__NR_msgctl"), @const("__NR_ipc"))
	@_SYSCALL_MSGCTL_NAME
	@SYSC_RETVALSTR($return)
}

# nd_msgctl _____________________________________________________

probe nd_syscall.msgctl = nd1_syscall.msgctl!, nd2_syscall.msgctl!, tp_syscall.msgctl
  { }

probe nd1_syscall.msgctl = kprobe.function("sys_msgctl") ?
{
	@__syscall_gate2(@const("__NR_msgctl"), @const("__NR_ipc"))
	@_SYSCALL_MSGCTL_NAME
	asmlinkage()
	@_SYSCALL_MSGCTL_REGARGS
	@_SYSCALL_MSGCTL_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.msgctl = kprobe.function(@arch_syscall_prefix "sys_msgctl") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_MSGCTL_NAME
	@_SYSCALL_MSGCTL_REGARGS
	@_SYSCALL_MSGCTL_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.msgctl = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_msgctl"))
	@_SYSCALL_MSGCTL_NAME
	@_SYSCALL_MSGCTL_REGARGS
	@_SYSCALL_MSGCTL_ARGSTR
}

probe nd_syscall.msgctl.return = nd1_syscall.msgctl.return!, nd2_syscall.msgctl.return!, tp_syscall.msgctl.return
  { }
  
probe nd1_syscall.msgctl.return = kprobe.function("sys_msgctl").return ?
{
	@__syscall_gate2(@const("__NR_msgctl"), @const("__NR_ipc"))
	@_SYSCALL_MSGCTL_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.msgctl.return = kprobe.function(@arch_syscall_prefix "sys_msgctl").return ?
{
	@_SYSCALL_MSGCTL_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.msgctl.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_msgctl"))
	@_SYSCALL_MSGCTL_NAME
	@SYSC_RETVALSTR($ret)
}

# compat_sys_msgctl ________________________________________
#
# long compat_sys_msgctl(int first, int second, void __user *uptr)
# ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
#  COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
#	u32, third, compat_uptr_t, ptr, u32, fifth)
# endif
#

probe syscall.compat_sys_msgctl = dw_syscall.compat_sys_msgctl !,
                                  nd_syscall.compat_sys_msgctl ? {}
probe syscall.compat_sys_msgctl.return = dw_syscall.compat_sys_msgctl.return !,
                                         nd_syscall.compat_sys_msgctl.return ? {}

# dw_compat_sys_msgctl _____________________________________________________

probe dw_syscall.compat_sys_msgctl = __syscall.compat_msgctl ?,
      __syscall.compat_ipc.msgctl ?
{
	@_SYSCALL_MSGCTL_NAME
	cmd_str = _stp_msgctl_cmd_str(cmd)
	@_SYSCALL_MSGCTL_ARGSTR
}
probe __syscall.compat_msgctl = kernel.function("compat_sys_msgctl").call ?
{
	@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
	msqid = __int32(@choose_defined($first, $msqid))
	cmd = __int32(@choose_defined($second, $cmd))
	buf_uaddr = $uptr
}
probe __syscall.compat_ipc.msgctl = kernel.function("compat_sys_ipc").call ?,
				    kernel.function("sys32_ipc").call ?
{
	if (($call & 0xffff) != @const("MSGCTL")) next;
	msqid = __int32($first)
	cmd = __int32($second)
	buf_uaddr = $ptr
}
probe dw_syscall.compat_sys_msgctl.return =
	__syscall.compat_sys_msgctl.return ?,
	__syscall.compat_ipc.msgctl.return ?
{
	@_SYSCALL_MSGCTL_NAME
	@SYSC_RETVALSTR($return)
}
probe __syscall.compat_sys_msgctl.return =
	kernel.function("compat_sys_msgctl").return ?
{
	@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
}
probe __syscall.compat_ipc.msgctl.return =
	kernel.function("compat_sys_ipc").return ?,
	kernel.function("sys32_ipc").return ?
{
	if ((@entry($call) & 0xffff) != @const("MSGCTL")) next;
}

# nd_compat_sys_msgctl _____________________________________________________

probe nd_syscall.compat_sys_msgctl = nd1_syscall.compat_sys_msgctl!, nd2_syscall.compat_sys_msgctl!, tp_syscall.compat_sys_msgctl
  { }

probe nd1_syscall.compat_sys_msgctl = __nd1_syscall.compat_msgctl ?,
      __nd1_syscall.compat_ipc.msgctl ?
{
	@_SYSCALL_MSGCTL_NAME
	asmlinkage()
	@_SYSCALL_MSGCTL_ARGSTR
}
probe __nd1_syscall.compat_msgctl = kprobe.function("compat_sys_msgctl") ?
{
	@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
	asmlinkage()
	@_SYSCALL_MSGCTL_REGARGS
}
probe __nd1_syscall.compat_ipc.msgctl = kprobe.function("compat_sys_ipc") ?,
				       kprobe.function("sys32_ipc") ?
{
	asmlinkage()
	if ((uint_arg(1) & 0xffff) != @const("MSGCTL")) next;
	@_SYSCALL_IPC_MSGCTL_REGARGS
}

/* kernel 4.17+ */
probe nd2_syscall.compat_sys_msgctl = kprobe.function(@arch_syscall_prefix "compat_sys_ipc") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	if ((uint_arg(1) & 0xffff) != @const("MSGCTL")) next;
	@_SYSCALL_MSGCTL_NAME
	@_SYSCALL_IPC_MSGCTL_REGARGS
	@_SYSCALL_MSGCTL_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_sys_msgctl = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__compat_syscall_gate(@const("__NR_compat_ipc"))
	if ((uint_arg(1) & 0xffff) != @const("MSGCTL")) next;
	@_SYSCALL_MSGCTL_NAME
	@_SYSCALL_IPC_MSGCTL_REGARGS
	@_SYSCALL_MSGCTL_ARGSTR
}

probe nd_syscall.compat_sys_msgctl.return = nd1_syscall.compat_sys_msgctl.return!, nd2_syscall.compat_sys_msgctl.return!, tp_syscall.compat_sys_msgctl.return
  { }
  
probe nd1_syscall.compat_sys_msgctl.return =
	__nd1_syscall.compat_sys_msgctl.return ?,
	__nd1_syscall.compat_ipc.msgctl.return ?
{
	@_SYSCALL_MSGCTL_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.compat_sys_msgctl.return =
	kprobe.function("compat_sys_msgctl").return ?
{
	@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
}
probe __nd1_syscall.compat_ipc.msgctl.return =
	kprobe.function("compat_sys_ipc").return ?,
	kprobe.function("sys32_ipc").return ?
{
	if ((@entry(__asmlinkage_int_arg(1)) & 0xffff) != @const("MSGCTL")) next;
}

/* kernel 4.17+ */
probe nd2_syscall.compat_sys_msgctl.return =
	kprobe.function(@arch_syscall_prefix "compat_sys_ipc").return ?
{
	__set_syscall_pt_regs(@entry(pointer_arg(1)))
	if ((uint_arg(1) & 0xffff) != @const("MSGCTL")) next;
	@_SYSCALL_MSGCTL_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_sys_msgctl.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__compat_syscall_gate(@const("__NR_compat_ipc"))
	if ((uint_arg(1) & 0xffff) != @const("MSGCTL")) next;
	@_SYSCALL_MSGCTL_NAME
	@SYSC_RETVALSTR($ret)
}