1 // TODO: Import those from libc, see https://github.com/rust-lang/libc/pull/1638 2 const AT_HWCAP: u64 = 16; 3 const HWCAP_SHA2: u64 = 64; 4 5 #[inline(always)] sha2_supported() -> bool6pub fn sha2_supported() -> bool { 7 let hwcaps: u64 = unsafe { ::libc::getauxval(AT_HWCAP) }; 8 (hwcaps & HWCAP_SHA2) != 0 9 } 10