diff options
| author | Yury Khrustalev <yury.khrustalev@arm.com> | 2025-04-28 15:12:04 +0100 |
|---|---|---|
| committer | Yury Khrustalev <yury.khrustalev@arm.com> | 2025-11-10 11:28:19 +0000 |
| commit | 1f57ffdf35334ab245544cbb88f3abf2e6c77c54 (patch) | |
| tree | 2c440211499ee8c640cf537272af5b26b024bc4e | |
| parent | 580746904b978f661c568d0a52350f249d0c398a (diff) | |
aarch64: Disable ZA state of SME in setjmp and sigsetjmp
Due to the nature of the ZA state, setjmp() should clear it in the
same manner as it is already done by longjmp.
Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
(cherry picked from commit a7f6fd976c17b82dc198290b4ab7087f35855a0e)
| -rw-r--r-- | sysdeps/aarch64/setjmp.S | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sysdeps/aarch64/setjmp.S b/sysdeps/aarch64/setjmp.S index b630ca099a..f8845fcb8f 100644 --- a/sysdeps/aarch64/setjmp.S +++ b/sysdeps/aarch64/setjmp.S @@ -37,6 +37,29 @@ ENTRY (__sigsetjmp) PTR_ARG (0) 1: + +#if IS_IN(libc) + /* Disable ZA state of SME in libc.a and libc.so, but not in ld.so. */ +# if HAVE_AARCH64_PAC_RET + PACIASP + cfi_window_save +# endif + stp x29, x30, [sp, -16]! + cfi_adjust_cfa_offset (16) + cfi_rel_offset (x29, 0) + cfi_rel_offset (x30, 8) + mov x29, sp + bl __libc_arm_za_disable + ldp x29, x30, [sp], 16 + cfi_adjust_cfa_offset (-16) + cfi_restore (x29) + cfi_restore (x30) +# if HAVE_AARCH64_PAC_RET + AUTIASP + cfi_window_save +# endif +#endif + stp x19, x20, [x0, #JB_X19<<3] stp x21, x22, [x0, #JB_X21<<3] stp x23, x24, [x0, #JB_X23<<3] |