diff options
| -rw-r--r-- | libgcc/config/aarch64/__arm_za_disable.S | 5 | ||||
| -rw-r--r-- | libgcc/config/aarch64/aarch64-unwind.h | 16 |
2 files changed, 21 insertions, 0 deletions
diff --git a/libgcc/config/aarch64/__arm_za_disable.S b/libgcc/config/aarch64/__arm_za_disable.S index cff5b9c..03fc28a 100644 --- a/libgcc/config/aarch64/__arm_za_disable.S +++ b/libgcc/config/aarch64/__arm_za_disable.S @@ -63,3 +63,8 @@ ENTRY (__arm_za_disable) L(end): ret END (__arm_za_disable) + +/* Hidden alias used by the unwinder. */ +.global __libgcc_arm_za_disable +.hidden __libgcc_arm_za_disable +.set __libgcc_arm_za_disable, __arm_za_disable diff --git a/libgcc/config/aarch64/aarch64-unwind.h b/libgcc/config/aarch64/aarch64-unwind.h index d669edd..9fe6c8f 100644 --- a/libgcc/config/aarch64/aarch64-unwind.h +++ b/libgcc/config/aarch64/aarch64-unwind.h @@ -78,4 +78,20 @@ aarch64_demangle_return_addr (struct _Unwind_Context *context, return addr; } +/* SME runtime function local to libgcc, streaming compatible + and preserves more registers than the base PCS requires, but + we don't rely on that here. */ +__attribute__ ((visibility ("hidden"))) +void __libgcc_arm_za_disable (void); + +/* Disable the SME ZA state in case an unwound frame used the ZA + lazy saving scheme. */ +#undef _Unwind_Frames_Extra +#define _Unwind_Frames_Extra(x) \ + do \ + { \ + __libgcc_arm_za_disable (); \ + } \ + while (0) + #endif /* defined AARCH64_UNWIND_H && defined __ILP32__ */ |