diff options
| -rw-r--r-- | sysdeps/aarch64/crti.S | 2 | ||||
| -rw-r--r-- | sysdeps/aarch64/crtn.S | 2 | ||||
| -rw-r--r-- | sysdeps/aarch64/dl-tlsdesc.S | 3 | ||||
| -rw-r--r-- | sysdeps/aarch64/dl-trampoline.S | 2 | ||||
| -rw-r--r-- | sysdeps/aarch64/multiarch/memset_emag.S | 2 | ||||
| -rw-r--r-- | sysdeps/aarch64/multiarch/memset_falkor.S | 1 | ||||
| -rw-r--r-- | sysdeps/aarch64/multiarch/memset_generic.S | 2 | ||||
| -rw-r--r-- | sysdeps/aarch64/multiarch/rtld-memset.S | 2 | ||||
| -rw-r--r-- | sysdeps/aarch64/start.S | 1 | ||||
| -rw-r--r-- | sysdeps/aarch64/sysdep.h | 34 |
10 files changed, 50 insertions, 1 deletions
diff --git a/sysdeps/aarch64/crti.S b/sysdeps/aarch64/crti.S index 1728eac37a..c346bcad72 100644 --- a/sysdeps/aarch64/crti.S +++ b/sysdeps/aarch64/crti.S @@ -75,6 +75,7 @@ call_weak_fn: .hidden _init .type _init, %function _init: + BTI_C stp x29, x30, [sp, -16]! mov x29, sp #if PREINIT_FUNCTION_WEAK @@ -89,5 +90,6 @@ _init: .hidden _fini .type _fini, %function _fini: + BTI_C stp x29, x30, [sp, -16]! mov x29, sp diff --git a/sysdeps/aarch64/crtn.S b/sysdeps/aarch64/crtn.S index c3e97cc449..0c1ef112c2 100644 --- a/sysdeps/aarch64/crtn.S +++ b/sysdeps/aarch64/crtn.S @@ -37,6 +37,8 @@ /* crtn.S puts function epilogues in the .init and .fini sections corresponding to the prologues in crti.S. */ +#include <sysdep.h> + .section .init,"ax",%progbits ldp x29, x30, [sp], 16 RET diff --git a/sysdeps/aarch64/dl-tlsdesc.S b/sysdeps/aarch64/dl-tlsdesc.S index 557ad1d505..9d96c8632a 100644 --- a/sysdeps/aarch64/dl-tlsdesc.S +++ b/sysdeps/aarch64/dl-tlsdesc.S @@ -74,6 +74,7 @@ cfi_startproc .align 2 _dl_tlsdesc_return: + BTI_C DELOUSE (0) ldr PTR_REG (0), [x0, #PTR_SIZE] RET @@ -95,6 +96,7 @@ _dl_tlsdesc_return: cfi_startproc .align 2 _dl_tlsdesc_undefweak: + BTI_C str x1, [sp, #-16]! cfi_adjust_cfa_offset (16) DELOUSE (0) @@ -142,6 +144,7 @@ _dl_tlsdesc_undefweak: cfi_startproc .align 2 _dl_tlsdesc_dynamic: + BTI_C DELOUSE (0) /* Save just enough registers to support fast path, if we fall diff --git a/sysdeps/aarch64/dl-trampoline.S b/sysdeps/aarch64/dl-trampoline.S index 94e965c096..2cbfa81434 100644 --- a/sysdeps/aarch64/dl-trampoline.S +++ b/sysdeps/aarch64/dl-trampoline.S @@ -35,6 +35,7 @@ cfi_startproc .align 2 _dl_runtime_resolve: + BTI_C /* AArch64 we get called with: ip0 &PLTGOT[2] ip1 temp(dl resolver entry point) @@ -126,6 +127,7 @@ _dl_runtime_resolve: cfi_startproc .align 2 _dl_runtime_profile: + BTI_C /* AArch64 we get called with: ip0 &PLTGOT[2] ip1 temp(dl resolver entry point) diff --git a/sysdeps/aarch64/multiarch/memset_emag.S b/sysdeps/aarch64/multiarch/memset_emag.S index c4d3533c14..3c2e9d2903 100644 --- a/sysdeps/aarch64/multiarch/memset_emag.S +++ b/sysdeps/aarch64/multiarch/memset_emag.S @@ -17,6 +17,8 @@ License along with the GNU C Library. If not, see <https://www.gnu.org/licenses/>. */ +#include <sysdep.h> + #if IS_IN (libc) # define MEMSET __memset_emag diff --git a/sysdeps/aarch64/multiarch/memset_falkor.S b/sysdeps/aarch64/multiarch/memset_falkor.S index 54fd5abffb..154527398f 100644 --- a/sysdeps/aarch64/multiarch/memset_falkor.S +++ b/sysdeps/aarch64/multiarch/memset_falkor.S @@ -17,6 +17,7 @@ License along with the GNU C Library. If not, see <https://www.gnu.org/licenses/>. */ +#include <sysdep.h> #include <memset-reg.h> /* Reading dczid_el0 is expensive on falkor so move it into the ifunc diff --git a/sysdeps/aarch64/multiarch/memset_generic.S b/sysdeps/aarch64/multiarch/memset_generic.S index 46c5329cdf..d746d1d00c 100644 --- a/sysdeps/aarch64/multiarch/memset_generic.S +++ b/sysdeps/aarch64/multiarch/memset_generic.S @@ -17,6 +17,8 @@ License along with the GNU C Library. If not, see <https://www.gnu.org/licenses/>. */ +#include <sysdep.h> + #if IS_IN (libc) # define MEMSET __memset_generic /* Add a hidden definition for use within libc.so. */ diff --git a/sysdeps/aarch64/multiarch/rtld-memset.S b/sysdeps/aarch64/multiarch/rtld-memset.S index 44bc479411..f9845bdd62 100644 --- a/sysdeps/aarch64/multiarch/rtld-memset.S +++ b/sysdeps/aarch64/multiarch/rtld-memset.S @@ -17,6 +17,8 @@ License along with the GNU C Library. If not, see <https://www.gnu.org/licenses/>. */ +#include <sysdep.h> + #if IS_IN (rtld) # define MEMSET memset # include <sysdeps/aarch64/memset.S> diff --git a/sysdeps/aarch64/start.S b/sysdeps/aarch64/start.S index d96cf57e2d..75393e1c18 100644 --- a/sysdeps/aarch64/start.S +++ b/sysdeps/aarch64/start.S @@ -46,6 +46,7 @@ .globl _start .type _start,#function _start: + BTI_C /* Create an initial frame with 0 LR and FP */ mov x29, #0 mov x30, #0 diff --git a/sysdeps/aarch64/sysdep.h b/sysdeps/aarch64/sysdep.h index 604c489170..0eeb0bb2f1 100644 --- a/sysdeps/aarch64/sysdep.h +++ b/sysdeps/aarch64/sysdep.h @@ -41,6 +41,35 @@ #define ASM_SIZE_DIRECTIVE(name) .size name,.-name +/* Branch Target Identitication support. */ +#define BTI_C hint 34 +#define BTI_J hint 36 + +/* 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; \ + .text + +/* Add GNU property note with the supported features to all asm code + where sysdep.h is included. */ +#if HAVE_AARCH64_BTI +GNU_PROPERTY (FEATURE_1_AND, FEATURE_1_BTI) +#endif + /* Define an entry point visible from C. */ #define ENTRY(name) \ .globl C_SYMBOL_NAME(name); \ @@ -48,6 +77,7 @@ .align 4; \ C_LABEL(name) \ cfi_startproc; \ + BTI_C; \ CALL_MCOUNT /* Define an entry point visible from C. */ @@ -57,6 +87,7 @@ .p2align align; \ C_LABEL(name) \ cfi_startproc; \ + BTI_C; \ CALL_MCOUNT /* Define an entry point visible from C with a specified alignment and @@ -68,11 +99,12 @@ .globl C_SYMBOL_NAME(name); \ .type C_SYMBOL_NAME(name),%function; \ .p2align align; \ - .rep padding; \ + .rep padding - 1; /* -1 for bti c. */ \ nop; \ .endr; \ C_LABEL(name) \ cfi_startproc; \ + BTI_C; \ CALL_MCOUNT #undef END |