diff options
| -rw-r--r-- | coroutine/arm64/Context.S | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/coroutine/arm64/Context.S b/coroutine/arm64/Context.S index 0eb08e326d..cdcc6ca6dd 100644 --- a/coroutine/arm64/Context.S +++ b/coroutine/arm64/Context.S @@ -91,3 +91,37 @@ PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer): #if defined(__linux__) && defined(__ELF__) .section .note.GNU-stack,"",%progbits #endif + +#if __ARM_FEATURE_BTI_DEFAULT != 0 || __ARM_FEATURE_PAC_DEFAULT != 0 +/* See "ELF for the Arm 64-bit Architecture (AArch64)" + https://github.com/ARM-software/abi-aa/blob/2023Q3/aaelf64/aaelf64.rst#program-property */ +# define GNU_PROPERTY_AARCH64_FEATURE_1_BTI (1<<0) +# define GNU_PROPERTY_AARCH64_FEATURE_1_PAC (1<<1) + +# if __ARM_FEATURE_BTI_DEFAULT != 0 +# define BTI_FLAG GNU_PROPERTY_AARCH64_FEATURE_1_BTI +# else +# define BTI_FLAG 0 +# endif +# if __ARM_FEATURE_PAC_DEFAULT != 0 +# define PAC_FLAG GNU_PROPERTY_AARCH64_FEATURE_1_PAC +# else +# define PAC_FLAG 0 +# endif + + # The note section format is described by Note Section in Chapter 5 + # of "System V Application Binary Interface, Edition 4.1". + .pushsection .note.gnu.property, "a" + .p2align 3 + .long 0x4 /* Name size ("GNU\0") */ + .long 0x10 /* Descriptor size */ + .long 0x5 /* Type: NT_GNU_PROPERTY_TYPE_0 */ + .asciz "GNU" /* Name */ + # Begin descriptor + .long 0xc0000000 /* Property type: GNU_PROPERTY_AARCH64_FEATURE_1_AND */ + .long 0x4 /* Property size */ + .long (BTI_FLAG|PAC_FLAG) + .long 0x0 /* 8-byte alignment padding */ + # End descriptor + .popsection +#endif |