- return term;
-}
-
-/* Returns a short identifier for the various VM implementations */
-int detect_vm(const char **id) {
-
-#if defined(__i386__) || defined(__x86_64__)
-
- /* Both CPUID and DMI are x86 specific interfaces... */
-
- static const char *const dmi_vendors[] = {
- "/sys/class/dmi/id/sys_vendor",
- "/sys/class/dmi/id/board_vendor",
- "/sys/class/dmi/id/bios_vendor"
- };
-
- static const char dmi_vendor_table[] =
- "QEMU\0" "qemu\0"
- /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
- "VMware\0" "vmware\0"
- "VMW\0" "vmware\0"
- "Microsoft Corporation\0" "microsoft\0"
- "innotek GmbH\0" "oracle\0"
- "Xen\0" "xen\0"
- "Bochs\0" "bochs\0";
-
- static const char cpuid_vendor_table[] =
- "XenVMMXenVMM\0" "xen\0"
- "KVMKVMKVM\0" "kvm\0"
- /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
- "VMwareVMware\0" "vmware\0"
- /* http://msdn.microsoft.com/en-us/library/ff542428.aspx */
- "Microsoft Hv\0" "microsoft\0";
-
- uint32_t eax, ecx;
- union {
- uint32_t sig32[3];
- char text[13];
- } sig;
- unsigned i;
- const char *j, *k;
- bool hypervisor;
-
- /* http://lwn.net/Articles/301888/ */
- zero(sig);
-
-#if defined (__i386__)
-#define REG_a "eax"
-#define REG_b "ebx"
-#elif defined (__amd64__)
-#define REG_a "rax"
-#define REG_b "rbx"
-#endif
-
- /* First detect whether there is a hypervisor */
- eax = 1;
- __asm__ __volatile__ (
- /* ebx/rbx is being used for PIC! */
- " push %%"REG_b" \n\t"
- " cpuid \n\t"
- " pop %%"REG_b" \n\t"
-
- : "=a" (eax), "=c" (ecx)
- : "0" (eax)
- );
-
- hypervisor = !!(ecx & 0x80000000U);
-
- if (hypervisor) {
-
- /* There is a hypervisor, see what it is */
- eax = 0x40000000U;
- __asm__ __volatile__ (
- /* ebx/rbx is being used for PIC! */
- " push %%"REG_b" \n\t"
- " cpuid \n\t"
- " mov %%ebx, %1 \n\t"
- " pop %%"REG_b" \n\t"
-
- : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2])
- : "0" (eax)
- );
-
- NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table)
- if (streq(sig.text, j)) {
-
- if (id)
- *id = k;
-
- return 1;
- }
- }
-
- for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) {
- char *s;
- int r;
- const char *found = NULL;
-
- if ((r = read_one_line_file(dmi_vendors[i], &s)) < 0) {
- if (r != -ENOENT)
- return r;
-
- continue;
- }
-
- NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table)
- if (startswith(s, j))
- found = k;
- free(s);
-
- if (found) {
- if (id)
- *id = found;
-
- return 1;
- }
- }
-
- if (hypervisor) {
- if (id)
- *id = "other-vm";
-
- return 1;
- }
-
-#endif
- return 0;