
EBX (or RBX on x86_64) is used for the PIC base address. The current cpuid inline assembly only saved ebx which is fine under i386 but only half of the fun on x86_64.
EBX (or RBX on x86_64) is used for the PIC base address. The current cpuid inline assembly only saved ebx which is fine under i386 but only half of the fun on x86_64.