lkml.org 
[lkml]   [2000]   [Oct]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: executing function in kernel whose name is known
>
>>
>> >> i know the name of a function which is stored in some string in a
kernel
>> >> module, is there any way to execute that function.
>> >> That function is implemented in a module and has been exported.
>> >> thanks,
>> >> anil
>
>> >you mean execute from userspace? No.
>> >You mean execute from kernel space? Yes, but you would need to ensure
the
>> >module cannot be unloaded (by incrementing its module reference
>> >counter) while the function is invoked.
>> >Tigran
>>
>> module having that function won't be unloaded. but my problem is i know
>> only name (a string containing name of the function) but not function
>> pointer. could you please elaborate on how to do this??
>>

>Indeed, there is a function called get_module_symbol() (in
>kernel/module.c) which gets the address of a symbol in the given module.
>Actually, this doesn't even require kdb -- it is in the plain vanilla
>kernel and is even exported to modules...


thanks Tigran,
i got it working by using get_module_symbol();

its something like

void(*f)(int)


(void*)f = get_module_symbol(NULL, "name of the function");

..
now you have the funtion pointer you can call as you like



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:39    [W:0.037 / U:8.416 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site