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# setdomainname ______________________________________________
#
# asmlinkage long
# sys_setdomainname(char __user *name,
# int len)
#
@define _SYSCALL_SETDOMAINNAME_NAME
%(
name = "setdomainname"
%)
@define _SYSCALL_SETDOMAINNAME_ARGSTR
%(
argstr = sprintf("%s, %d", domainname_str, len)
%)
@define _SYSCALL_SETDOMAINNAME_REGARGS
%(
domainname_uaddr = pointer_arg(1)
%( systemtap_v <= "2.8" %?
hostname_uaddr = domainname_uaddr
%)
domainname_str = user_string_quoted(domainname_uaddr)
domainname_str_unquoted = user_string_nofault(pointer_arg(1))
len = int_arg(2)
%)
@define _SYSCALL_SETDOMAINNAME_REGARGS_STORE
%(
if (@probewrite(domainname_uaddr))
set_pointer_arg(1, domainname_uaddr)
%( systemtap_v <= "2.8" %?
if (@probewrite(hostname_uaddr))
set_pointer_arg(1, hostname_uaddr)
%)
if (@probewrite(domainname_str_unquoted))
set_user_string_arg(pointer_arg(1), domainname_str_unquoted)
if (@probewrite(len))
set_int_arg(2, len)
%)
probe syscall.setdomainname = dw_syscall.setdomainname !,
nd_syscall.setdomainname ? {}
probe syscall.setdomainname.return = dw_syscall.setdomainname.return !,
nd_syscall.setdomainname.return ? {}
# dw_setdomainname _____________________________________________________
probe dw_syscall.setdomainname = kernel.function("sys_setdomainname").call
{
@_SYSCALL_SETDOMAINNAME_NAME
domainname_uaddr = $name
%( systemtap_v <= "2.8" %?
hostname_uaddr = domainname_uaddr
%)
domainname_str = user_string_quoted(domainname_uaddr)
len = __int32($len)
@_SYSCALL_SETDOMAINNAME_ARGSTR
}
probe dw_syscall.setdomainname.return = kernel.function("sys_setdomainname").return
{
@_SYSCALL_SETDOMAINNAME_NAME
@SYSC_RETVALSTR($return)
}
# nd_setdomainname _____________________________________________________
probe nd_syscall.setdomainname = nd1_syscall.setdomainname!, nd2_syscall.setdomainname!, tp_syscall.setdomainname
{ }
probe nd1_syscall.setdomainname = kprobe.function("sys_setdomainname") ?
{
@_SYSCALL_SETDOMAINNAME_NAME
asmlinkage()
@_SYSCALL_SETDOMAINNAME_REGARGS
@_SYSCALL_SETDOMAINNAME_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.setdomainname = kprobe.function(@arch_syscall_prefix "sys_setdomainname") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_SETDOMAINNAME_NAME
@_SYSCALL_SETDOMAINNAME_REGARGS
@_SYSCALL_SETDOMAINNAME_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SETDOMAINNAME_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setdomainname = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_setdomainname"), @const("__NR_compat_setdomainname"))
@_SYSCALL_SETDOMAINNAME_NAME
@_SYSCALL_SETDOMAINNAME_REGARGS
@_SYSCALL_SETDOMAINNAME_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SETDOMAINNAME_REGARGS_STORE %)
}
probe nd_syscall.setdomainname.return = nd1_syscall.setdomainname.return!, nd2_syscall.setdomainname.return!, tp_syscall.setdomainname.return
{ }
probe nd1_syscall.setdomainname.return = kprobe.function("sys_setdomainname").return ?
{
@_SYSCALL_SETDOMAINNAME_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.setdomainname.return = kprobe.function(@arch_syscall_prefix "sys_setdomainname").return ?
{
@_SYSCALL_SETDOMAINNAME_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setdomainname.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_setdomainname"), @const("__NR_compat_setdomainname"))
@_SYSCALL_SETDOMAINNAME_NAME
@SYSC_RETVALSTR($ret)
}
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