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# renameat2 ___________________________________________________
# SYSCALL_DEFINE5(renameat2, int, olddfd, const char __user *, oldname,
# int, newdfd, const char __user *, newname, unsigned int, flags)
#
# renameat2() was added to Linux in kernel 3.15.
#
@define _SYSCALL_RENAMEAT2_NAME
%(
name = "renameat2"
%)
@define _SYSCALL_RENAMEAT2_ARGSTR
%(
argstr = sprintf("%s, %s, %s, %s, %s", olddfd_str, oldname_str, newdfd_str, newname_str, flags_str)
%)
@define _SYSCALL_RENAMEAT2_REGARGS
%(
olddfd = int_arg(1)
olddfd_str = _dfd_str(olddfd)
oldname = pointer_arg(2)
oldname_str = user_string_quoted(oldname)
oldname_str_unquoted = user_string_nofault(pointer_arg(2))
newdfd = int_arg(3)
newdfd_str = _dfd_str(newdfd)
newname = pointer_arg(4)
newname_str = user_string_quoted(newname)
newname_str_unquoted = user_string_nofault(pointer_arg(4))
flags = uint_arg(5)
flags_str = _renameat2_flags_str(flags)
%)
@define _SYSCALL_RENAMEAT2_REGARGS_STORE
%(
if (@probewrite(olddfd))
set_int_arg(1, olddfd)
if (@probewrite(oldname))
set_pointer_arg(2, oldname)
if (@probewrite(oldname_str_unquoted))
set_user_string_arg(pointer_arg(2), oldname_str_unquoted)
if (@probewrite(newdfd))
set_int_arg(3, newdfd)
if (@probewrite(newname))
set_pointer_arg(4, newname)
if (@probewrite(newname_str_unquoted))
set_user_string_arg(pointer_arg(4), newname_str_unquoted)
if (@probewrite(flags))
set_uint_arg(5, flags)
%)
probe syscall.renameat2 = dw_syscall.renameat2 !, nd_syscall.renameat2 ? {}
probe syscall.renameat2.return = dw_syscall.renameat2.return !,
nd_syscall.renameat2.return ? {}
# dw_renameat2 _____________________________________________________
probe dw_syscall.renameat2 = kernel.function("sys_renameat2").call ?
{
@__syscall_compat_gate(@const("__NR_renameat2"),
@const("__NR_compat_renameat2"))
@_SYSCALL_RENAMEAT2_NAME
olddfd = __int32($olddfd)
olddfd_str = _dfd_str(__int32($olddfd))
oldname = $oldname
oldname_str = user_string_quoted($oldname)
newdfd = __int32($newdfd)
newdfd_str = _dfd_str(__int32($newdfd))
newname = $newname
newname_str = user_string_quoted($newname)
flags = __uint32($flags)
flags_str = _renameat2_flags_str(flags)
@_SYSCALL_RENAMEAT2_ARGSTR
}
probe dw_syscall.renameat2.return = kernel.function("sys_renameat2").return ?
{
@__syscall_compat_gate(@const("__NR_renameat2"),
@const("__NR_compat_renameat2"))
@_SYSCALL_RENAMEAT2_NAME
@SYSC_RETVALSTR($return)
}
# nd_renameat2 _____________________________________________________
probe nd_syscall.renameat2 = nd1_syscall.renameat2!, nd2_syscall.renameat2!, tp_syscall.renameat2
{ }
probe nd1_syscall.renameat2 = kprobe.function("sys_renameat2") ?
{
@__syscall_compat_gate(@const("__NR_renameat2"),
@const("__NR_compat_renameat2"))
@_SYSCALL_RENAMEAT2_NAME
asmlinkage()
@_SYSCALL_RENAMEAT2_REGARGS
@_SYSCALL_RENAMEAT2_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.renameat2 = kprobe.function(@arch_syscall_prefix "sys_renameat2") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_RENAMEAT2_NAME
@_SYSCALL_RENAMEAT2_REGARGS
@_SYSCALL_RENAMEAT2_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_RENAMEAT2_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.renameat2 = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_renameat2"), @const("__NR_compat_renameat2"))
@_SYSCALL_RENAMEAT2_NAME
@_SYSCALL_RENAMEAT2_REGARGS
@_SYSCALL_RENAMEAT2_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_RENAMEAT2_REGARGS_STORE %)
}
probe nd_syscall.renameat2.return = nd1_syscall.renameat2.return!, nd2_syscall.renameat2.return!, tp_syscall.renameat2.return
{ }
probe nd1_syscall.renameat2.return = kprobe.function("sys_renameat2").return ?
{
@__syscall_compat_gate(@const("__NR_renameat2"),
@const("__NR_compat_renameat2"))
@_SYSCALL_RENAMEAT2_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.renameat2.return = kprobe.function(@arch_syscall_prefix "sys_renameat2").return ?
{
@_SYSCALL_RENAMEAT2_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.renameat2.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_renameat2"), @const("__NR_compat_renameat2"))
@_SYSCALL_RENAMEAT2_NAME
@SYSC_RETVALSTR($ret)
}
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