diff options
Diffstat (limited to 'include/common/asm_macros.S')
| -rw-r--r-- | include/common/asm_macros.S | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/include/common/asm_macros.S b/include/common/asm_macros.S index a331c051..d4bd11ee 100644 --- a/include/common/asm_macros.S +++ b/include/common/asm_macros.S @@ -66,11 +66,36 @@ b.ne $label .endm + /* + * 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, 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, 0 + \label: + .endm /* - * This macro verifies that the a given vector doesn't exceed the + * This macro verifies that the given vector doesn't exceed the * architectural limit of 32 instructions. This is meant to be placed - * immedately after the last instruction in the vector. It takes the + * immediately after the last instruction in the vector. It takes the * vector entry as the parameter */ .macro check_vector_size since |