Vincent De Groote <list.encelade@xxxxxxxxx> writes:
> I would like to execute the cpuid instruction on a x86
>
> So I declared
>
> typedef unsigned long int register_t;
>
> struct response_t {
> register_t eax;
> register_t ebx;
> register_t ecx;
> register_t edx;
> };
>
> void cpuid ( register_t command, struct response_t * response ) {
>
> ...
>
> }
>
> How can I, in assembler, assign the value of a register (for example
> ebx) to the response->ebx field ?
The gcc sources call cpuid themselves. Look at gcc/config/i386/cpuid.h
for examples.
Ian
