관리-도구

편집 파일: sysc_fanotify_mark.stp

# fanotify_mark ______________________________________________
# fanotify_mark() was enabled in kernel version 2.6.37.
#
# SYSCALL_DEFINE5(fanotify_mark, int, fanotify_fd, unsigned int, flags,
#		  __u64, mask, int, dfd,
#		  const char  __user *, pathname)
# COMPAT_SYSCALL_DEFINE6(fanotify_mark,
#				int, fanotify_fd, unsigned int, flags,
#				__u32, mask0, __u32, mask1, int, dfd,
#				const char  __user *, pathname)

@define _SYSCALL_FANOTIFY_MARK_NAME
%(
	name = "fanotify_mark"
%)

@define _SYSCALL_FANOTIFY_MARK_ARGSTR
%(
	argstr = sprintf("%d, %s, %s, %s, %s", fanotify_fd, flags_str, mask_str,
	                 dirfd_str, pathname)
%)

@define _SYSCALL_FANOTIFY_MARK_REGARGS
%(
	fanotify_fd = int_arg(1)
	flags = uint_arg(2)
%( CONFIG_64BIT == "y" %?
	mask = ulonglong_arg(3)
	dirfd = int_arg(4)
	pathname = user_string_quoted(pointer_arg(5))
%:
	# On a 32-bit kernel, 'long long' arguments take the space of
	# 2 arguments, so we have to adjust the following argument
	# numbers.
	mask = ulonglong_arg(3)
	dirfd = int_arg(5)
	pathname = user_string_quoted(pointer_arg(6))
%)
%)

@define _SYSCALL_COMPAT_FANOTIFY_MARK_REGARGS
%(
	fanotify_fd = int_arg(1)
	flags = uint_arg(2)
	if (@__BIG_ENDIAN)
		mask = ((uint_arg(3) << 32) | uint_arg(4))
	else
		mask = ((uint_arg(4) << 32) | uint_arg(3))
	dirfd = int_arg(5)
	pathname = user_string_quoted(pointer_arg(6))
%)

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

# dw_fanotify_mark _____________________________________________________

probe dw_syscall.fanotify_mark = __syscall.fanotify_mark ?,
	__syscall.compat_fanotify_mark ?
{
	@_SYSCALL_FANOTIFY_MARK_NAME
	flags_str = _fanotify_mark_flags_str(flags)
	mask_str = _fanotify_mark_mask_str(mask)
	dirfd_str = _dfd_str(dirfd)
	@_SYSCALL_FANOTIFY_MARK_ARGSTR
}
probe __syscall.fanotify_mark = kernel.function("sys_fanotify_mark").call ?
{
	@__syscall_gate_compat_simple
	fanotify_fd = __int32($fanotify_fd)
	flags = __uint32($flags)
	mask = $mask
	dirfd = __int32($dfd)
	pathname = user_string_quoted(@__pointer($pathname))
}
probe __syscall.compat_fanotify_mark =
	kernel.function("compat_sys_fanotify_mark").call ?
{
	fanotify_fd = __int32($fanotify_fd)
	flags = __uint32($flags)
	if (@__BIG_ENDIAN)
		mask = ((__uint32($mask0) << 32) | __uint32($mask1))
	else
		mask = ((__uint32($mask1) << 32) | __uint32($mask0))
	dirfd = __int32($dfd)
	pathname = user_string_quoted(@__pointer($pathname))
}
probe dw_syscall.fanotify_mark.return =
	kernel.function("sys_fanotify_mark").return ?,
	kernel.function("compat_sys_fanotify_mark").return ?
{
	@_SYSCALL_FANOTIFY_MARK_NAME
	@SYSC_RETVALSTR($return)
}

# nd_fanotify_mark _____________________________________________________

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

probe nd1_syscall.fanotify_mark = __nd1_syscall.fanotify_mark ?,
	__nd1_syscall.compat_fanotify_mark ?
{
	@_SYSCALL_FANOTIFY_MARK_NAME
	flags_str = _fanotify_mark_flags_str(flags)
	mask_str = _fanotify_mark_mask_str(mask)
        dirfd_str = _dfd_str(dirfd)
	@_SYSCALL_FANOTIFY_MARK_ARGSTR
}
probe __nd1_syscall.fanotify_mark = kprobe.function("sys_fanotify_mark") ?
{
	@__syscall_gate_compat_simple
	asmlinkage()
	@_SYSCALL_FANOTIFY_MARK_REGARGS
}
probe __nd1_syscall.compat_fanotify_mark =
	kprobe.function("compat_sys_fanotify_mark") ?
{
	asmlinkage()
	@_SYSCALL_COMPAT_FANOTIFY_MARK_REGARGS
}

/* kernel 4.17+ */
probe nd2_syscall.fanotify_mark = __nd2_syscall.fanotify_mark ?,
	__nd2_syscall.compat_fanotify_mark ?
{
	@_SYSCALL_FANOTIFY_MARK_NAME
	flags_str = _fanotify_mark_flags_str(flags)
	mask_str = _fanotify_mark_mask_str(mask)
	dirfd_str = _dfd_str(dirfd)
	@_SYSCALL_FANOTIFY_MARK_ARGSTR
}
probe __nd2_syscall.fanotify_mark = kprobe.function(@arch_syscall_prefix "sys_fanotify_mark") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_FANOTIFY_MARK_REGARGS
}
probe __nd2_syscall.compat_fanotify_mark = 
	kprobe.function(@arch_syscall_prefix "compat_sys_fanotify_mark") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_COMPAT_FANOTIFY_MARK_REGARGS
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fanotify_mark = __tp_syscall.fanotify_mark ?,
	__tp_syscall.compat_fanotify_mark ?
{
	@_SYSCALL_FANOTIFY_MARK_NAME
	flags_str = _fanotify_mark_flags_str(flags)
	mask_str = _fanotify_mark_mask_str(mask)
	dirfd_str = _dfd_str(dirfd)
	@_SYSCALL_FANOTIFY_MARK_ARGSTR
}
probe __tp_syscall.fanotify_mark = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_fanotify_mark"))
	@_SYSCALL_FANOTIFY_MARK_REGARGS
}
probe __tp_syscall.compat_fanotify_mark = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__compat_syscall_gate(@const("__NR_compat_fanotify_mark"))
	@_SYSCALL_COMPAT_FANOTIFY_MARK_REGARGS
}

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

probe nd1_syscall.fanotify_mark.return =
	kprobe.function("sys_fanotify_mark").return ?,
	kprobe.function("compat_sys_fanotify_mark").return ?
{
	@_SYSCALL_FANOTIFY_MARK_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.fanotify_mark.return =
	kprobe.function(@arch_syscall_prefix "sys_fanotify_mark").return ?,
	kprobe.function(@arch_syscall_prefix "compat_sys_fanotify_mark").return ?
{
	@_SYSCALL_FANOTIFY_MARK_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fanotify_mark.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_fanotify_mark"), @const("__NR_compat_fanotify_mark"))
	@_SYSCALL_FANOTIFY_MARK_NAME
	@SYSC_RETVALSTR($ret)
}