관리-도구

편집 파일: sysc_shutdown.stp

# shutdown ___________________________________________________
#
# long sys_shutdown(int fd, int how)
#

@define _SYSCALL_SHUTDOWN_NAME
%(
	name = "shutdown"
%)

@define _SYSCALL_SHUTDOWN_ARGSTR
%(
	argstr = sprintf("%d, %s", s, how_str)
%)

@define _SYSCALL_SHUTDOWN_REGARGS
%(
	s = int_arg(1)
	how = int_arg(2)
%)

@define _SYSCALL_SOCKETCALL_SHUTDOWN_REGARGS
%(
	__args = &@ulong_cast(pointer_arg(2))
	s = __int32(user_ulong(&@ulong_cast(__args)[0]))
	how = __int32(user_ulong(&@ulong_cast(__args)[1]))
%)

@define _SYSCALL_COMPAT_SOCKETCALL_SHUTDOWN_REGARGS
%(
	__args = &@uint_cast(pointer_arg(2))
	s = user_int(&@uint_cast(__args)[0])
	how = user_int(&@uint_cast(__args)[1])
%)

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

# dw_shutdown _____________________________________________________

probe dw_syscall.shutdown = __syscall.shutdown ?, __syscall.socketcall.shutdown ?,
	__syscall.compat_socketcall.shutdown ?
{
	@_SYSCALL_SHUTDOWN_NAME
	how_str = _shutdown_how_str(how)
	@_SYSCALL_SHUTDOWN_ARGSTR
}
probe __syscall.shutdown = kernel.function("sys_shutdown").call ?
{
	@__syscall_gate(@const("__NR_shutdown"))
	s = __int32($fd)
	how = __int32($how)
}
probe __syscall.socketcall.shutdown = kernel.function("sys_socketcall").call ?
{
	if (__int32($call) != @const("SYS_SHUTDOWN")) next;
	s = __int32(user_ulong(&@ulong_cast($args)[0]))
	how = __int32(user_ulong(&@ulong_cast($args)[1]))
}
probe __syscall.compat_socketcall.shutdown =
	kernel.function("compat_sys_socketcall").call ?
{
	if (__int32($call) != @const("SYS_SHUTDOWN")) next;
	s = user_int(&@uint_cast($args)[0])
	how = user_int(&@uint_cast($args)[1])
}
probe dw_syscall.shutdown.return = __syscall.shutdown.return ?,
	__syscall.socketcall.shutdown.return ?
{
	@_SYSCALL_SHUTDOWN_NAME
	@SYSC_RETVALSTR($return)
}
probe __syscall.shutdown.return = kernel.function("sys_shutdown").return ?
{
	@__syscall_gate(@const("__NR_shutdown"))
}
probe __syscall.socketcall.shutdown.return =
	kernel.function("sys_socketcall").return ?,
	kernel.function("compat_sys_socketcall").return ?
{
	if (__int32(@entry($call)) != @const("SYS_SHUTDOWN")) next;
}

# nd_shutdown _____________________________________________________

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

probe nd1_syscall.shutdown = __nd1_syscall.shutdown ?,
	__nd1_syscall.socketcall.shutdown ?,
	__nd1_syscall.compat_socketcall.shutdown ?
{
	@_SYSCALL_SHUTDOWN_NAME
	how_str = _shutdown_how_str(how)
	@_SYSCALL_SHUTDOWN_ARGSTR
}
probe __nd1_syscall.shutdown = kprobe.function("sys_shutdown") ?
{
	@__syscall_gate(@const("__NR_shutdown"))
	asmlinkage()
	@_SYSCALL_SHUTDOWN_REGARGS
}
probe __nd1_syscall.socketcall.shutdown = kprobe.function("sys_socketcall").call ?
{
	asmlinkage()
	if (int_arg(1) != @const("SYS_SHUTDOWN")) next;
	@_SYSCALL_SOCKETCALL_SHUTDOWN_REGARGS
}
probe __nd1_syscall.compat_socketcall.shutdown =
	kprobe.function("compat_sys_socketcall").call ?
{
	asmlinkage()
	if (int_arg(1) != @const("SYS_SHUTDOWN")) next;
	@_SYSCALL_COMPAT_SOCKETCALL_SHUTDOWN_REGARGS
}

/* kernel 4.17+ */
probe nd2_syscall.shutdown = __nd2_syscall.shutdown ?,
	__nd2_syscall.socketcall.shutdown ?,
	__nd2_syscall.compat_socketcall.shutdown ?
{
	@_SYSCALL_SHUTDOWN_NAME
	how_str = _shutdown_how_str(how)
	@_SYSCALL_SHUTDOWN_ARGSTR
}
probe __nd2_syscall.shutdown = kprobe.function(@arch_syscall_prefix "sys_shutdown") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_SHUTDOWN_REGARGS
}
probe __nd2_syscall.socketcall.shutdown = kprobe.function(@arch_syscall_prefix "sys_socketcall").call ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	if (int_arg(1) != @const("SYS_SHUTDOWN")) next;
	@_SYSCALL_SOCKETCALL_SHUTDOWN_REGARGS
}
probe __nd2_syscall.compat_socketcall.shutdown =
	kprobe.function(@arch_syscall_prefix "compat_sys_socketcall").call ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	if (int_arg(1) != @const("SYS_SHUTDOWN")) next;
	@_SYSCALL_COMPAT_SOCKETCALL_SHUTDOWN_REGARGS
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.shutdown = __tp_syscall.shutdown ?,
	__tp_syscall.socketcall.shutdown ?
{
	@_SYSCALL_SHUTDOWN_NAME
	how_str = _shutdown_how_str(how)
	@_SYSCALL_SHUTDOWN_ARGSTR
}
probe __tp_syscall.shutdown = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_shutdown"))
	@_SYSCALL_SHUTDOWN_REGARGS
}
probe __tp_syscall.socketcall.shutdown = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_socketcall"), @const("__NR_compat_socketcall"))
	if (int_arg(1) != @const("SYS_SHUTDOWN")) next;
	if (@__compat_task) {
		@_SYSCALL_COMPAT_SOCKETCALL_SHUTDOWN_REGARGS
	}
	else {
		@_SYSCALL_SOCKETCALL_SHUTDOWN_REGARGS
	}
}

probe nd_syscall.shutdown.return = nd1_syscall.shutdown.return!, nd2_syscall.shutdown.return!, tp_syscall.shutdown.return
  { }

probe nd1_syscall.shutdown.return = __nd1_syscall.shutdown.return ?,
	__nd1_syscall.socketcall.shutdown.return ?
{
	@_SYSCALL_SHUTDOWN_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.shutdown.return = kprobe.function("sys_shutdown").return ?
{
	@__syscall_gate(@const("__NR_shutdown"))
}
probe __nd1_syscall.socketcall.shutdown.return =
	kprobe.function("sys_socketcall").return ?,
	kprobe.function("compat_sys_socketcall").return ?
{
	if (@entry(__asmlinkage_int_arg(1)) != @const("SYS_SHUTDOWN")) next;
}

/* kernel 4.17+ */
probe nd2_syscall.shutdown.return =
	kprobe.function(@arch_syscall_prefix "sys_shutdown").return ?,
	__nd2_syscall.socketcall.shutdown.return ?
{
	@_SYSCALL_SHUTDOWN_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd2_syscall.socketcall.shutdown.return =
	kprobe.function(@arch_syscall_prefix "sys_socketcall").return ?,
	kprobe.function(@arch_syscall_prefix "compat_sys_socketcall").return ?
{
	__set_syscall_pt_regs(@entry(pointer_arg(1)))
	if (int_arg(1) != @const("SYS_SHUTDOWN")) next;
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.shutdown.return = __tp_syscall.shutdown.return ?,
	__tp_syscall.socketcall.shutdown.return ?
{
	@_SYSCALL_SHUTDOWN_NAME
	@SYSC_RETVALSTR($ret)
}
probe __tp_syscall.shutdown.return = kernel.trace("sys_exit")
{
	@__syscall_gate(@const("__NR_shutdown"))
}
probe __tp_syscall.socketcall.shutdown.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_socketcall"), @const("__NR_compat_socketcall"))
	if (int_arg(1) != @const("SYS_SHUTDOWN")) next;
}