Overflow in relocation type 11 val FFFFFF00104c3688

[Shawn Bohrer]

Hey everyone,

I'm trying to build one of my companies internal test modules on the
x86_64 architecture. The module is written in C++ so we do not use
the kernel's build system. When I try to load the module I see the
following error in the kernel prints:

Overflow in relocation type 11 val FFFFFF00104c3688
module likely not compiled with -mcmodel=kernel

Of course the problem is that I am compiling with -mcmodel=kernel and
-mno-red-zone. Additionally I have built one other module using the
same compile options and it loads fine. Am I missing some other
compile options? Is there something wrong with the code?

I have looked through the kernel code to see what would trigger this
error and it appears that I have a R_X86_64_32S value that overflows a
s32 but I can't seem to figure out how or where this is in the code,
or if I need another compile option to fix this. If someone could
give me some pointers it would be greatly appreciated.

Thanks,
Shawn

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[Shawn Bohrer]

On 4/30/07, Shawn Bohrer <shawn....@gmail.com> wrote:
> Hey everyone,
>
> I'm trying to build one of my companies internal test modules on the
> x86_64 architecture. The module is written in C++ so we do not use
> the kernel's build system. When I try to load the module I see the
> following error in the kernel prints:
>
> Overflow in relocation type 11 val FFFFFF00104c3688
> module likely not compiled with -mcmodel=kernel
>
> Of course the problem is that I am compiling with -mcmodel=kernel and
> -mno-red-zone. Additionally I have built one other module using the
> same compile options and it loads fine. Am I missing some other
> compile options? Is there something wrong with the code?
>

Well I found the problem though I'm not sure how to fix it. The
problem is that we define two symbols in our linker script and the
linker doesn't know about the -mcmodel=kernel option. Is there some
other way to do this in the linker script on 64-bit?

.ctors 0 :
{
___gNISSCtorStart___ = .;
KEEP (*(SORT(.ctors.*)))
KEEP (*(SORT(.ctors)))
___gNISSCtorEnd___ = .;
}
.dtors 0 :
{
___gNISSDtorStart___ = .;
KEEP (*(SORT(.dtors.*)))
KEEP (*(SORT(.dtors)))
___gNISSDtorEnd___ = .;