diff options
Diffstat (limited to 'include/common/asm_macros.S')
| -rw-r--r-- | include/common/asm_macros.S | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/include/common/asm_macros.S b/include/common/asm_macros.S index 00c7d88b..d4bd11ee 100644 --- a/include/common/asm_macros.S +++ b/include/common/asm_macros.S @@ -69,20 +69,26 @@ /* * Declare the exception vector table, enforcing it is aligned on a * 2KB boundary, as required by the ARMv8 architecture. + * Use zero bytes as the fill value to be stored in the padding bytes + * so that it inserts illegal AArch64 instructions. This increases + * security, robustness and potentially facilitates debugging. */ .macro vector_base label .section .vectors, "ax" - .align 11 + .align 11, 0 \label: .endm /* * Create an entry in the exception vector table, enforcing it is * aligned on a 128-byte boundary, as required by the ARMv8 architecture. + * Use zero bytes as the fill value to be stored in the padding bytes + * so that it inserts illegal AArch64 instructions. This increases + * security, robustness and potentially facilitates debugging. */ .macro vector_entry label .section .vectors, "ax" - .align 7 + .align 7, 0 \label: .endm |