diff options
Diffstat (limited to 'sysdeps/aarch64')
| -rw-r--r-- | sysdeps/aarch64/multiarch/strlen.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sysdeps/aarch64/multiarch/strlen.c b/sysdeps/aarch64/multiarch/strlen.c index 7c0352dd87..9440decf75 100644 --- a/sysdeps/aarch64/multiarch/strlen.c +++ b/sysdeps/aarch64/multiarch/strlen.c @@ -26,8 +26,14 @@ # include <string.h> # include <init-arch.h> -/* This should check HWCAP_MTE when it is available. */ -#define MTE_ENABLED() (false) +/* This should check HWCAP2_MTE when it is available: current + linux kernel does not expose it, but its value is reserved. + This is needed to make glibc MTE-safe on future systems in + case user code enables MTE. The ABI contract for enabling + MTE is not yet specified, but it can be useful for at least + debugging which does not need a contract. */ +#define FUTURE_HWCAP2_MTE (1 << 18) +#define MTE_ENABLED() (GLRO(dl_hwcap2) & FUTURE_HWCAP2_MTE) extern __typeof (__redirect_strlen) __strlen; |