diff --git a/src/util.c b/src/util.c index aa49390b87..e2859fafc1 100644 --- a/src/util.c +++ b/src/util.c @@ -3713,7 +3713,7 @@ int detect_vm(const char **id) { /* Both CPUID and DMI are x86 specific interfaces... */ - const char *const dmi_vendors[] = { + static const char *const dmi_vendors[] = { "/sys/class/dmi/id/sys_vendor", "/sys/class/dmi/id/board_vendor", "/sys/class/dmi/id/bios_vendor" @@ -3727,6 +3727,7 @@ int detect_vm(const char **id) { "Microsoft Corporation\0" "microsoft\0" "innotek GmbH\0" "oracle\0" "Xen\0" "xen\0" + "Bochs\0" "bochs\0" "\0"; static const char cpuid_vendor_table[] = @@ -3743,9 +3744,59 @@ int detect_vm(const char **id) { 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 & 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; @@ -3772,60 +3823,14 @@ int detect_vm(const char **id) { } } - /* 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) - ); - - if (ecx & 0x80000000U) { - - /* 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; - } - + if (hypervisor) { if (id) *id = "other"; return 1; } -#endif +#endif return 0; }