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|
# capset _____________________________________________________
/*
* NOTE
* this is probably not a good function
* to probe. The structures are always
* changing. It also seems like it is
* not really used. Cscope produced no
* reference of this function in the
* kernel (returned no callers). Perhaps
* cap_get_proc / cap_set_proc are better
* functions to export.
*/
# long sys_capset(cap_user_header_t header, const cap_user_data_t data)
@define _SYSCALL_CAPSET_NAME
%(
name = "capset"
%)
@define _SYSCALL_CAPSET_ARGSTR
%(
argstr = sprintf("%p, %p", header_uaddr, data_uaddr)
%)
@define _SYSCALL_CAPSET_REGARGS
%(
header_uaddr = pointer_arg(1)
data_uaddr = pointer_arg(2)
%)
@define _SYSCALL_CAPSET_REGARGS_STORE
%(
if (@probewrite(header_uaddr))
set_pointer_arg(1, header_uaddr)
if (@probewrite(data_uaddr))
set_pointer_arg(2, data_uaddr)
%)
probe syscall.capset = dw_syscall.capset !, nd_syscall.capset ? {}
probe syscall.capset.return = dw_syscall.capset.return !, nd_syscall.capset.return ? {}
# dw_capset _____________________________________________________
probe dw_syscall.capset = kernel.function("sys_capset").call
{
@_SYSCALL_CAPSET_NAME
header_uaddr = $header
data_uaddr = $data
@_SYSCALL_CAPSET_ARGSTR
}
probe dw_syscall.capset.return = kernel.function("sys_capset").return
{
@_SYSCALL_CAPSET_NAME
@SYSC_RETVALSTR($return)
}
# nd_capset _____________________________________________________
probe nd_syscall.capset = nd1_syscall.capset!, nd2_syscall.capset!, tp_syscall.capset
{ }
probe nd1_syscall.capset = kprobe.function("sys_capset") ?
{
@_SYSCALL_CAPSET_NAME
asmlinkage()
@_SYSCALL_CAPSET_REGARGS
@_SYSCALL_CAPSET_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.capset = kprobe.function(@arch_syscall_prefix "sys_capset")
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_CAPSET_NAME
@_SYSCALL_CAPSET_REGARGS
@_SYSCALL_CAPSET_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_CAPSET_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.capset = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_capset"), @const("__NR_compat_capset"))
@_SYSCALL_CAPSET_NAME
@_SYSCALL_CAPSET_REGARGS
@_SYSCALL_CAPSET_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_CAPSET_REGARGS_STORE %)
}
probe nd_syscall.capset.return = nd1_syscall.capset.return!, nd2_syscall.capset.return!, tp_syscall.capset.return
{ }
probe nd1_syscall.capset.return = kprobe.function("sys_capset").return ?
{
@_SYSCALL_CAPSET_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.capset.return = kprobe.function(@arch_syscall_prefix "sys_capset").return
{
@_SYSCALL_CAPSET_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.capset.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_capset"), @const("__NR_compat_capset"))
@_SYSCALL_CAPSET_NAME
@SYSC_RETVALSTR($ret)
}
|
