1void __init_cpu_features_resolver(unsigned long hwcap, 2 const __ifunc_arg_t *arg) { 3 if (__atomic_load_n(&__aarch64_cpu_features.features, __ATOMIC_RELAXED)) 4 return; 5 __init_cpu_features_constructor(hwcap, arg); 6} 7 8void CONSTRUCTOR_ATTRIBUTE __init_cpu_features(void) { 9 // CPU features already initialized. 10 if (__atomic_load_n(&__aarch64_cpu_features.features, __ATOMIC_RELAXED)) 11 return; 12 13 unsigned long hwcap = getauxval(AT_HWCAP); 14 unsigned long hwcap2 = getauxval(AT_HWCAP2); 15 16 __ifunc_arg_t arg; 17 arg._size = sizeof(__ifunc_arg_t); 18 arg._hwcap = hwcap; 19 arg._hwcap2 = hwcap2; 20 __init_cpu_features_constructor(hwcap | _IFUNC_ARG_HWCAP, &arg); 21} 22