On Mon, 23 Aug 2004, Lei Yang wrote:
Richard B. Johnson wrote:
Do `depmod -e test.ko` to see what it's complaining about. You can see all the symbols by using `nm`. Try it. Your code probably didn't define the necessary stuff to make a module. You need to look at a typical module (driver) that comes with the kernel. Just find one of the shortest ".c" files in the driver tree.
Thanks! I did less /var/log/messages, and got the unknown symbols Unknown symbol __divsf3 Unknown symbol __fixsfsi Unknown symbol __subsf3 Unknown symbol __floatsisf Unknown symbol __mulsf3 Unknown symbol __gesf2 Unknown symbol __addsf3
However, I don't know what those symbols are :( I am a bit worried that maybe I've done something that is not supported by the kernel, like left-shift 16 bits of an int, or floating operations.
Any hints?
Thanks a lot! Lei
You cannot use floating-point in the kernel. It appears that you are trying to make user-mode code execute within the kernel. It can't. That's not what a module does. The kernel executes code on behalf of the user-mode caller, in the context of the caller. It does things, on behalf of the user, that the user can't be trusted to do properly by himself. That's all the kernel is for! Any calculations and similar stuff can be done in regular user-mode code.
Sort of, I am trying to make a usr mode library work with kernel. However, floating point operation is necessary in the algorithm. You mean that this can never be done? Is changing floating-point the only thing I can do now?
Thanks! Lei
Cheers, Dick Johnson Penguin : Linux version 2.4.26 on an i686 machine (5570.56 BogoMips). Note 96.31% of all statistics are fiction.
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