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|
# sethostname ________________________________________________
#
# asmlinkage long
# sys_sethostname(char __user *name, int len)
#
@define _SYSCALL_SETHOSTNAME_NAME
%(
name = "sethostname"
%)
@define _SYSCALL_SETHOSTNAME_ARGSTR
%(
argstr = sprintf("%s, %d", name_str, len)
%)
@define _SYSCALL_SETHOSTNAME_REGARGS
%(
hostname_uaddr = pointer_arg(1)
name_str = user_string_quoted(hostname_uaddr)
name_str_unquoted = user_string_nofault(pointer_arg(1))
len = int_arg(2)
%)
@define _SYSCALL_SETHOSTNAME_REGARGS_STORE
%(
if (@probewrite(hostname_uaddr))
set_pointer_arg(1, hostname_uaddr)
if (@probewrite(name_str_unquoted))
set_user_string_arg(pointer_arg(1), name_str_unquoted)
if (@probewrite(len))
set_int_arg(2, len)
%)
probe syscall.sethostname = dw_syscall.sethostname !, nd_syscall.sethostname ? {}
probe syscall.sethostname.return = dw_syscall.sethostname.return !,
nd_syscall.sethostname.return ? {}
# dw_sethostname _____________________________________________________
probe dw_syscall.sethostname = kernel.function("sys_sethostname").call
{
@_SYSCALL_SETHOSTNAME_NAME
hostname_uaddr = $name
name_str = user_string_quoted($name)
len = __int32($len)
@_SYSCALL_SETHOSTNAME_ARGSTR
}
probe dw_syscall.sethostname.return = kernel.function("sys_sethostname").return
{
@_SYSCALL_SETHOSTNAME_NAME
@SYSC_RETVALSTR($return)
}
# nd_sethostname _____________________________________________________
probe nd_syscall.sethostname = nd1_syscall.sethostname!, nd2_syscall.sethostname!, tp_syscall.sethostname
{ }
probe nd1_syscall.sethostname = kprobe.function("sys_sethostname") ?
{
@_SYSCALL_SETHOSTNAME_NAME
asmlinkage()
@_SYSCALL_SETHOSTNAME_REGARGS
@_SYSCALL_SETHOSTNAME_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.sethostname = kprobe.function(@arch_syscall_prefix "sys_sethostname") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_SETHOSTNAME_NAME
@_SYSCALL_SETHOSTNAME_REGARGS
@_SYSCALL_SETHOSTNAME_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SETHOSTNAME_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sethostname = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_sethostname"), @const("__NR_compat_sethostname"))
@_SYSCALL_SETHOSTNAME_NAME
@_SYSCALL_SETHOSTNAME_REGARGS
@_SYSCALL_SETHOSTNAME_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SETHOSTNAME_REGARGS_STORE %)
}
probe nd_syscall.sethostname.return = nd1_syscall.sethostname.return!, nd2_syscall.sethostname.return!, tp_syscall.sethostname.return
{ }
probe nd1_syscall.sethostname.return = kprobe.function("sys_sethostname").return ?
{
@_SYSCALL_SETHOSTNAME_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.sethostname.return = kprobe.function(@arch_syscall_prefix "sys_sethostname").return ?
{
@_SYSCALL_SETHOSTNAME_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sethostname.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_sethostname"), @const("__NR_compat_sethostname"))
@_SYSCALL_SETHOSTNAME_NAME
@SYSC_RETVALSTR($ret)
}
|
