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편집 파일: sysc_getsockname.stp

# getsockname ________________________________________________
# long sys_getsockname(int fd,
#		struct sockaddr __user *usockaddr,
#		int __user *usockaddr_len)

@define _SYSCALL_GETSOCKNAME_NAME
%(
	name = "getsockname"
%)

@define _SYSCALL_GETSOCKNAME_ARGSTR
%(
	argstr = sprintf("%d, %p, %p", s, name_uaddr, namelen_uaddr)
%)

@define _SYSCALL_GETSOCKNAME_REGARGS
%(
	s = int_arg(1)
	name_uaddr = pointer_arg(2)
	namelen_uaddr = pointer_arg(3)
%)

@define _SYSCALL_SOCKETCALL_GETSOCKNAME_REGARGS
%(
	__args = &@ulong_cast(pointer_arg(2))
	s = __int32(user_ulong(&@ulong_cast(__args)[0]))
	name_uaddr = user_ulong(&@ulong_cast(__args)[1])
	namelen_uaddr = user_ulong(&@ulong_cast(__args)[2])
%)

@define _SYSCALL_COMPAT_SOCKETCALL_GETSOCKNAME_REGARGS
%(
	__args = &@uint_cast(pointer_arg(2))
	s = user_int(&@uint_cast(__args)[0])
	name_uaddr = user_uint32(&@uint_cast(__args)[1])
	namelen_uaddr = user_uint32(&@uint_cast(__args)[2])
%)

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

# dw_getsockname _____________________________________________________

probe dw_syscall.getsockname = __syscall.getsockname ?,
	__syscall.socketcall.getsockname ?,
	__syscall.compat_socketcall.getsockname ?
{
	@_SYSCALL_GETSOCKNAME_NAME
	@_SYSCALL_GETSOCKNAME_ARGSTR
}
probe __syscall.getsockname = kernel.function("sys_getsockname").call ?
{
	@__syscall_gate(@const("__NR_getsockname"))
	s = __int32($fd)
	name_uaddr = $usockaddr
	namelen_uaddr = $usockaddr_len
}
probe __syscall.socketcall.getsockname = kernel.function("sys_socketcall").call ?
{
	if (__int32($call) != @const("SYS_GETSOCKNAME")) next;
	s = __int32(user_ulong(&@ulong_cast($args)[0]))
	name_uaddr = user_ulong(&@ulong_cast($args)[1])
	namelen_uaddr = user_ulong(&@ulong_cast($args)[2])
}
probe __syscall.compat_socketcall.getsockname =
	kernel.function("compat_sys_socketcall").call ?
{
	if (__int32($call) != @const("SYS_GETSOCKNAME")) next;
	s = user_int(&@uint_cast($args)[0])
	name_uaddr = user_uint32(&@uint_cast($args)[1])
	namelen_uaddr = user_uint32(&@uint_cast($args)[2])
}
probe dw_syscall.getsockname.return = __syscall.getsockname.return ?,
	__syscall.socketcall.getsockname.return ?
{
	@_SYSCALL_GETSOCKNAME_NAME
	@SYSC_RETVALSTR($return)
}
probe __syscall.getsockname.return = kernel.function("sys_getsockname").return ?
{
	@__syscall_gate(@const("__NR_getsockname"))
}
probe __syscall.socketcall.getsockname.return =
	kernel.function("sys_socketcall").return ?,
	kernel.function("compat_sys_socketcall").return ?
{
	if (__int32(@entry($call)) != @const("SYS_GETSOCKNAME")) next;
}

# nd_getsockname _____________________________________________________

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

probe nd1_syscall.getsockname = __nd1_syscall.getsockname ?,
	__nd1_syscall.socketcall.getsockname ?,
	__nd1_syscall.compat_socketcall.getsockname ?
{
	@_SYSCALL_GETSOCKNAME_NAME
	@_SYSCALL_GETSOCKNAME_ARGSTR
}
probe __nd1_syscall.getsockname = kprobe.function("sys_getsockname") ?
{
	@__syscall_gate(@const("__NR_getsockname"))
	asmlinkage()
	@_SYSCALL_GETSOCKNAME_REGARGS
}
probe __nd1_syscall.socketcall.getsockname =
	kprobe.function("sys_socketcall").call ?
{
	asmlinkage()
	if (int_arg(1) != @const("SYS_GETSOCKNAME")) next;
	@_SYSCALL_SOCKETCALL_GETSOCKNAME_REGARGS
}
probe __nd1_syscall.compat_socketcall.getsockname =
	kprobe.function("compat_sys_socketcall").call ?
{
	asmlinkage()
	if (int_arg(1) != @const("SYS_GETSOCKNAME")) next;
	@_SYSCALL_COMPAT_SOCKETCALL_GETSOCKNAME_REGARGS
}

/* kernel 4.17+ */
probe nd2_syscall.getsockname = __nd2_syscall.getsockname ?,
	__nd2_syscall.socketcall.getsockname ?,
	__nd2_syscall.compat_socketcall.getsockname ?
{
	@_SYSCALL_GETSOCKNAME_NAME
	@_SYSCALL_GETSOCKNAME_ARGSTR
}
probe __nd2_syscall.getsockname = kprobe.function(@arch_syscall_prefix "sys_getsockname") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_GETSOCKNAME_REGARGS
}
probe __nd2_syscall.socketcall.getsockname =
	kprobe.function(@arch_syscall_prefix "sys_socketcall").call ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	if (int_arg(1) != @const("SYS_GETSOCKNAME")) next;
	@_SYSCALL_SOCKETCALL_GETSOCKNAME_REGARGS
}
probe __nd2_syscall.compat_socketcall.getsockname =
	kprobe.function(@arch_syscall_prefix "compat_sys_socketcall").call ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	if (int_arg(1) != @const("SYS_GETSOCKNAME")) next;
	@_SYSCALL_COMPAT_SOCKETCALL_GETSOCKNAME_REGARGS
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.getsockname = __tp_syscall.getsockname ?,
	__tp_syscall.socketcall.getsockname ?
{
	@_SYSCALL_GETSOCKNAME_NAME
	@_SYSCALL_GETSOCKNAME_ARGSTR
}
probe __tp_syscall.getsockname = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_getsockname"))
	@_SYSCALL_GETSOCKNAME_REGARGS
}
probe __tp_syscall.socketcall.getsockname = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_socketcall"), @const("__NR_compat_socketcall"))
	if (int_arg(1) != @const("SYS_GETSOCKNAME")) next;
	if (@__compat_task) {
		@_SYSCALL_COMPAT_SOCKETCALL_GETSOCKNAME_REGARGS
	}
	else {
		@_SYSCALL_SOCKETCALL_GETSOCKNAME_REGARGS
	}
}

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

probe nd1_syscall.getsockname.return =
	__nd1_syscall.getsockname.return ?,
	__nd1_syscall.socketcall.getsockname.return ?
{
	@_SYSCALL_GETSOCKNAME_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.getsockname.return =
	kprobe.function("sys_getsockname").return ?
{
	@__syscall_gate(@const("__NR_getsockname"))
}
probe __nd1_syscall.socketcall.getsockname.return =
	kprobe.function("sys_socketcall").return ?,
	kprobe.function("compat_sys_socketcall").return ?
{
	if (@entry(__asmlinkage_int_arg(1)) != @const("SYS_GETSOCKNAME")) next;
}

/* kernel 4.17+ */
probe nd2_syscall.getsockname.return =
	kprobe.function(@arch_syscall_prefix "sys_getsockname").return ?,
	__nd2_syscall.socketcall.getsockname.return ?
{
	@_SYSCALL_GETSOCKNAME_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd2_syscall.socketcall.getsockname.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_GETSOCKNAME")) next;
}

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