diff options
| -rw-r--r-- | libgcc/config/aarch64/lse.S | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libgcc/config/aarch64/lse.S b/libgcc/config/aarch64/lse.S index 9e2acae..64691c6 100644 --- a/libgcc/config/aarch64/lse.S +++ b/libgcc/config/aarch64/lse.S @@ -136,6 +136,8 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #define tmp1 17 #define tmp2 15 +#define BTI_C hint 34 + /* Start and end a function. */ .macro STARTFN name .text @@ -145,6 +147,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see .type \name, %function .cfi_startproc \name: + BTI_C .endm .macro ENDFN name @@ -275,6 +278,29 @@ STARTFN NAME(LDNM) ENDFN NAME(LDNM) #endif +/* GNU_PROPERTY_AARCH64_* macros from elf.h for use in asm code. */ +#define FEATURE_1_AND 0xc0000000 +#define FEATURE_1_BTI 1 +#define FEATURE_1_PAC 2 + +/* Add a NT_GNU_PROPERTY_TYPE_0 note. */ +#define GNU_PROPERTY(type, value) \ + .section .note.gnu.property, "a"; \ + .p2align 3; \ + .word 4; \ + .word 16; \ + .word 5; \ + .asciz "GNU"; \ + .word type; \ + .word 4; \ + .word value; \ + .word 0; + #if defined(__linux__) || defined(__FreeBSD__) .section .note.GNU-stack, "", %progbits + +/* Add GNU property note if built with branch protection. */ +# ifdef __ARM_FEATURE_BTI_DEFAULT +GNU_PROPERTY (FEATURE_1_AND, FEATURE_1_BTI) +# endif #endif |