Archipelago » qemu

static void host_cpuid(uint32_t function, uint32_t count, uint32_t *eax,

                       uint32_t *ebx, uint32_t *ecx, uint32_t *edx);

static void host_cpuid(uint32_t function, uint32_t count,

                       uint32_t *eax, uint32_t *ebx,

                       uint32_t *ecx, uint32_t *edx)

{

#if defined(CONFIG_KVM)

    uint32_t vec[4];

#ifdef __x86_64__

    asm volatile("cpuid"

                 : "=a"(vec[0]), "=b"(vec[1]),

                   "=c"(vec[2]), "=d"(vec[3])

                 : "0"(function), "c"(count) : "cc");

#else

    asm volatile("pusha \n\t"

                 "cpuid \n\t"

                 "mov %%eax, 0(%2) \n\t"

                 "mov %%ebx, 4(%2) \n\t"

                 "mov %%ecx, 8(%2) \n\t"

                 "mov %%edx, 12(%2) \n\t"

                 "popa"

                 : : "a"(function), "c"(count), "S"(vec)

                 : "memory", "cc");

#endif

    if (eax)

	*eax = vec[0];

    if (ebx)

	*ebx = vec[1];

    if (ecx)

	*ecx = vec[2];

    if (edx)

	*edx = vec[3];

#endif

}