관리-도구

편집 파일: sysc_bind.stp

# bind _______________________________________________________
# long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen)

@define _SYSCALL_BIND_NAME
%(
	name = "bind"
%)

@define _SYSCALL_BIND_ARGSTR
%(
	argstr = sprintf("%d, %s, %d", sockfd,
			 _struct_sockaddr_u(my_addr_uaddr, addrlen), addrlen)
%)

@define _SYSCALL_BIND_REGARGS
%(
	sockfd = int_arg(1)
	my_addr_uaddr = pointer_arg(2)
	addrlen = int_arg(3)
%)

@define _SYSCALL_SOCKETCALL_BIND_REGARGS
%(
	__args = &@ulong_cast(pointer_arg(2))
	sockfd = __int32(user_ulong(&@ulong_cast(__args)[0]))
	my_addr_uaddr = user_ulong(&@ulong_cast(__args)[1])
	addrlen = __int32(user_ulong(&@ulong_cast(__args)[2]))
%)

@define _SYSCALL_COMPAT_SOCKETCALL_BIND_REGARGS
%(
	__args = &@uint_cast(pointer_arg(2))
	sockfd = user_int(&@uint_cast(__args)[0])
	my_addr_uaddr = user_uint32(&@uint_cast(__args)[1])
	addrlen = user_int(&@uint_cast(__args)[2])
%)

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

# dw_bind _____________________________________________________

probe dw_syscall.bind = __syscall.bind ?, __syscall.socketcall.bind ?,
	__syscall.compat_socketcall.bind ?
{
	@_SYSCALL_BIND_NAME
	@_af_inet_info_u(my_addr_uaddr, addrlen)
	@_SYSCALL_BIND_ARGSTR
}
probe __syscall.bind = kernel.function("sys_bind").call ?
{
	@__syscall_gate(@const("__NR_bind"))
	sockfd = __int32($fd)
	my_addr_uaddr = $umyaddr
	addrlen = __int32($addrlen)
}
probe __syscall.socketcall.bind = kernel.function("sys_socketcall").call ?
{
	if (__int32($call) != @const("SYS_BIND")) next;
	sockfd = __int32(user_ulong(&@ulong_cast($args)[0]))
	my_addr_uaddr = user_ulong(&@ulong_cast($args)[1])
	addrlen = __int32(user_ulong(&@ulong_cast($args)[2]))
}
probe __syscall.compat_socketcall.bind =
	kernel.function("compat_sys_socketcall").call ?
{
	if (__int32($call) != @const("SYS_BIND")) next;
	sockfd = user_int(&@uint_cast($args)[0])
	my_addr_uaddr = user_uint32(&@uint_cast($args)[1])
	addrlen = user_int(&@uint_cast($args)[2])
}
probe dw_syscall.bind.return = __syscall.bind.return ?,
	__syscall.socketcall.bind.return ?
{
	@_SYSCALL_BIND_NAME
	@SYSC_RETVALSTR($return)
}
probe __syscall.bind.return = kernel.function("sys_bind").return ?
{
	@__syscall_gate(@const("__NR_bind"))
}
probe __syscall.socketcall.bind.return =
	kernel.function("sys_socketcall").return ?,
	kernel.function("compat_sys_socketcall").return ?
{
	if (__int32(@entry($call)) != @const("SYS_BIND")) next;
}

# nd_bind _____________________________________________________

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

probe nd1_syscall.bind = __nd1_syscall.bind ?, __nd1_syscall.socketcall.bind ?,
	__nd1_syscall.compat_socketcall.bind ?
{
	@_SYSCALL_BIND_NAME
	@_af_inet_info_u(my_addr_uaddr, addrlen)
	@_SYSCALL_BIND_ARGSTR
}
probe __nd1_syscall.bind = kprobe.function("sys_bind") ?
{
	@__syscall_gate(@const("__NR_bind"))
	asmlinkage()
	@_SYSCALL_BIND_REGARGS
}
probe __nd1_syscall.socketcall.bind = kprobe.function("sys_socketcall").call ?
{
	asmlinkage()
	if (int_arg(1) != @const("SYS_BIND")) next;
	@_SYSCALL_SOCKETCALL_BIND_REGARGS
}
probe __nd1_syscall.compat_socketcall.bind =
	kprobe.function("compat_sys_socketcall").call ?
{
	asmlinkage()
	if (int_arg(1) != @const("SYS_BIND")) next;
	@_SYSCALL_COMPAT_SOCKETCALL_BIND_REGARGS
}

/* kernel 4.17+ */
probe nd2_syscall.bind = __nd2_syscall.bind ?,
	__nd2_syscall.socketcall.bind ?,
	__nd2_syscall.compat_socketcall.bind ?
{
	@_SYSCALL_BIND_NAME
	@_af_inet_info_u(my_addr_uaddr, addrlen)
	@_SYSCALL_BIND_ARGSTR
}
probe __nd2_syscall.bind = kprobe.function(@arch_syscall_prefix "sys_bind") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_BIND_REGARGS
}
probe __nd2_syscall.socketcall.bind = kprobe.function(@arch_syscall_prefix "sys_socketcall").call ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	if (int_arg(1) != @const("SYS_BIND")) next;
	@_SYSCALL_SOCKETCALL_BIND_REGARGS
}
probe __nd2_syscall.compat_socketcall.bind =
	kprobe.function(@arch_syscall_prefix "compat_sys_socketcall").call ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	if (int_arg(1) != @const("SYS_BIND")) next;
	@_SYSCALL_COMPAT_SOCKETCALL_BIND_REGARGS
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.bind = __tp_syscall.bind ?,
	__tp_syscall.socketcall.bind ?
{
	@_SYSCALL_BIND_NAME
	@_af_inet_info_u(my_addr_uaddr, addrlen)
	@_SYSCALL_BIND_ARGSTR
}
probe __tp_syscall.bind = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_bind"))
	@_SYSCALL_BIND_REGARGS
}
probe __tp_syscall.socketcall.bind = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_socketcall"), @const("__NR_compat_socketcall"))
	if (int_arg(1) != @const("SYS_BIND")) next;
	if (@__compat_task) {
		@_SYSCALL_COMPAT_SOCKETCALL_BIND_REGARGS
	}
	else {
		@_SYSCALL_SOCKETCALL_BIND_REGARGS
	}
}

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

probe nd1_syscall.bind.return = __nd1_syscall.bind.return ?,
	__nd1_syscall.socketcall.bind.return ?
{
	@_SYSCALL_BIND_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.bind.return = kprobe.function("sys_bind").return ?
{
	@__syscall_gate(@const("__NR_bind"))
}
probe __nd1_syscall.socketcall.bind.return =
	kprobe.function("sys_socketcall").return ?,
	kprobe.function("compat_sys_socketcall").return ?
{
	if (@entry(__asmlinkage_int_arg(1)) != @const("SYS_BIND")) next;
}

/* kernel 4.17+ */
probe nd2_syscall.bind.return =
	kprobe.function(@arch_syscall_prefix "sys_bind").return ?,
	__nd2_syscall.socketcall.bind.return ?
{
	@_SYSCALL_BIND_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd2_syscall.socketcall.bind.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_BIND")) next;
}

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