Using the out-of-line LSE atomics helpers for AArch64 on FreeBSD also
requires adding support for initializing __aarch64_have_lse_atomics
correctly. On Linux this is done with getauxval(3), on FreeBSD with
elf_aux_info(3), which has a slightly different interface.
Differential Revision: https://reviews.llvm.org/D109330
#define HWCAP_ATOMICS (1 << 8)
#endif
static void CONSTRUCTOR_ATTRIBUTE init_have_lse_atomics(void) {
+#if defined(__FreeBSD__)
+ unsigned long hwcap;
+ int result = elf_aux_info(AT_HWCAP, &hwcap, sizeof hwcap);
+ __aarch64_have_lse_atomics = result == 0 && (hwcap & HWCAP_ATOMICS) != 0;
+#else
unsigned long hwcap = getauxval(AT_HWCAP);
__aarch64_have_lse_atomics = (hwcap & HWCAP_ATOMICS) != 0;
+#endif
}
#endif // defined(__has_include)
#endif // __has_include(<sys/auxv.h>)