diff options
Diffstat (limited to 'sysdeps/x86/sys/platform/x86.h')
| -rw-r--r-- | sysdeps/x86/sys/platform/x86.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sysdeps/x86/sys/platform/x86.h b/sysdeps/x86/sys/platform/x86.h index 1ea2c5fc0b..89b1b16f22 100644 --- a/sysdeps/x86/sys/platform/x86.h +++ b/sysdeps/x86/sys/platform/x86.h @@ -45,6 +45,23 @@ x86_cpu_present (unsigned int __index) static __inline__ _Bool x86_cpu_active (unsigned int __index) { + if (__index == x86_cpu_IBT || __index == x86_cpu_SHSTK) + { +#ifdef __x86_64__ + unsigned int __feature_1; +# ifdef __LP64__ + __asm__ ("mov %%fs:72, %0" : "=r" (__feature_1)); +# else + __asm__ ("mov %%fs:40, %0" : "=r" (__feature_1)); +# endif + if (__index == x86_cpu_IBT) + return __feature_1 & x86_feature_1_ibt; + else + return __feature_1 & x86_feature_1_shstk; +#else + return false; +#endif + } const struct cpuid_feature *__ptr = __x86_get_cpuid_feature_leaf (__index / (8 * sizeof (unsigned int) * 4)); unsigned int __reg |