diff options
Diffstat (limited to 'libgcc/config/aarch64/lse-init.c')
| -rw-r--r-- | libgcc/config/aarch64/lse-init.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/libgcc/config/aarch64/lse-init.c b/libgcc/config/aarch64/lse-init.c index 74acef25cce..00e9ab8cd1c 100644 --- a/libgcc/config/aarch64/lse-init.c +++ b/libgcc/config/aarch64/lse-init.c @@ -29,19 +29,20 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see _Bool __aarch64_have_lse_atomics __attribute__((visibility("hidden"), nocommon)); -/* Disable initialization of __aarch64_have_lse_atomics during bootstrap. */ -#if !defined(inhibit_libc) && defined(HAVE_SYS_AUXV_H) -# include <sys/auxv.h> +/* Gate availability of __getauxval on glibc. All AArch64-supporting glibc + versions support it. */ +#ifdef __gnu_linux__ -/* Disable initialization if the system headers are too old. */ -# if defined(AT_HWCAP) && defined(HWCAP_ATOMICS) +# define AT_HWCAP 16 +# define HWCAP_ATOMICS (1 << 8) + +unsigned long int __getauxval (unsigned long int); static void __attribute__((constructor)) init_have_lse_atomics (void) { - unsigned long hwcap = getauxval (AT_HWCAP); + unsigned long hwcap = __getauxval (AT_HWCAP); __aarch64_have_lse_atomics = (hwcap & HWCAP_ATOMICS) != 0; } -# endif /* HWCAP */ -#endif /* inhibit_libc */ +#endif /* __gnu_linux__ */ |