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-rw-r--r--libc/arch-arm64/bionic/__bionic_clone.S2
-rw-r--r--libc/arch-arm64/bionic/_exit_with_stack_teardown.S2
-rw-r--r--libc/arch-arm64/bionic/setjmp.S10
-rw-r--r--libc/arch-arm64/bionic/syscall.S2
-rw-r--r--libc/arch-arm64/bionic/vfork.S6
-rw-r--r--libc/arch-arm64/generic/bionic/__memcpy_chk.S2
-rw-r--r--libc/arch-arm64/generic/bionic/memcpy.S2
-rw-r--r--libc/arch-arm64/generic/bionic/memmove.S2
-rw-r--r--libc/arch-arm64/generic/bionic/memset.S2
-rw-r--r--libc/arch-arm64/generic/bionic/wmemmove.S2
-rw-r--r--libc/arch-arm64/static_function_dispatch.S2
-rw-r--r--libc/arch-common/bionic/crtbegin.c2
-rw-r--r--libc/arch-common/bionic/crtbrand.S6
-rw-r--r--libc/arch-common/bionic/crtend.S6
-rw-r--r--libc/arch-common/bionic/crtend_so.S6
-rw-r--r--libc/private/bionic_asm.h4
-rw-r--r--libc/private/bionic_asm_arm64.h29
-rwxr-xr-xlibc/tools/gensyscalls.py2
18 files changed, 88 insertions, 1 deletions
diff --git a/libc/arch-arm64/bionic/__bionic_clone.S b/libc/arch-arm64/bionic/__bionic_clone.S
index c3ff0e50c..e9932adaf 100644
--- a/libc/arch-arm64/bionic/__bionic_clone.S
+++ b/libc/arch-arm64/bionic/__bionic_clone.S
@@ -57,3 +57,5 @@ ENTRY_PRIVATE(__bionic_clone)
ldp x0, x1, [sp], #16
b __start_thread
END(__bionic_clone)
+
+NOTE_GNU_PROPERTY()
diff --git a/libc/arch-arm64/bionic/_exit_with_stack_teardown.S b/libc/arch-arm64/bionic/_exit_with_stack_teardown.S
index 6a7b1e561..c53a1f412 100644
--- a/libc/arch-arm64/bionic/_exit_with_stack_teardown.S
+++ b/libc/arch-arm64/bionic/_exit_with_stack_teardown.S
@@ -39,3 +39,5 @@ ENTRY_PRIVATE(_exit_with_stack_teardown)
svc #0
// The exit syscall does not return.
END(_exit_with_stack_teardown)
+
+NOTE_GNU_PROPERTY()
diff --git a/libc/arch-arm64/bionic/setjmp.S b/libc/arch-arm64/bionic/setjmp.S
index a2b23702a..07270c9da 100644
--- a/libc/arch-arm64/bionic/setjmp.S
+++ b/libc/arch-arm64/bionic/setjmp.S
@@ -118,6 +118,8 @@ END(_setjmp)
// int sigsetjmp(sigjmp_buf env, int save_signal_mask);
ENTRY(sigsetjmp)
__BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(sigsetjmp)
+ hint #25 // paciasp
+ .cfi_negate_ra_state
stp x0, x30, [sp, #-16]!
.cfi_def_cfa_offset 16
.cfi_rel_offset x0, 0
@@ -184,6 +186,8 @@ __BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(sigsetjmp)
#endif
mov w0, #0
+ hint #29 // autiasp
+ .cfi_negate_ra_state
ret
END(sigsetjmp)
@@ -250,7 +254,9 @@ __BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(siglongjmp)
1:
// Restore core registers.
bic x2, x2, #1
+ // x30 was saved with PAC to jmp_buf in sigsetjmp().
ldp x30, x10, [x0, #(_JB_X30_SP * 8)]
+ .cfi_negate_ra_state
ldp x28, x29, [x0, #(_JB_X28_X29 * 8)]
ldp x26, x27, [x0, #(_JB_X26_X27 * 8)]
ldp x24, x25, [x0, #(_JB_X24_X25 * 8)]
@@ -290,6 +296,8 @@ __BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(siglongjmp)
// Set return value.
cmp w1, wzr
csinc w0, w1, wzr, ne
+ hint #29 // autiasp
+ .cfi_negate_ra_state
ret
END(siglongjmp)
@@ -297,3 +305,5 @@ ALIAS_SYMBOL(longjmp, siglongjmp)
__BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(longjmp)
ALIAS_SYMBOL(_longjmp, siglongjmp)
__BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(_longjmp)
+
+NOTE_GNU_PROPERTY()
diff --git a/libc/arch-arm64/bionic/syscall.S b/libc/arch-arm64/bionic/syscall.S
index 8389f9830..9e6f68ac4 100644
--- a/libc/arch-arm64/bionic/syscall.S
+++ b/libc/arch-arm64/bionic/syscall.S
@@ -47,3 +47,5 @@ ENTRY(syscall)
ret
END(syscall)
+
+NOTE_GNU_PROPERTY()
diff --git a/libc/arch-arm64/bionic/vfork.S b/libc/arch-arm64/bionic/vfork.S
index 5cfb8b0cc..81b84a3ea 100644
--- a/libc/arch-arm64/bionic/vfork.S
+++ b/libc/arch-arm64/bionic/vfork.S
@@ -67,6 +67,8 @@ __BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(vfork)
// Clean up stack shadow in the parent process.
// https://github.com/google/sanitizers/issues/925
+ hint #25 // paciasp
+ .cfi_negate_ra_state
stp x0, x30, [sp, #-16]!
.cfi_adjust_cfa_offset 16
.cfi_rel_offset x0, 0
@@ -79,9 +81,13 @@ __BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(vfork)
.cfi_adjust_cfa_offset -16
.cfi_restore x0
.cfi_restore x30
+ hint #29 // autiasp
+ .cfi_negate_ra_state
#endif
.L_exit:
ret
END(vfork)
+
+NOTE_GNU_PROPERTY()
diff --git a/libc/arch-arm64/generic/bionic/__memcpy_chk.S b/libc/arch-arm64/generic/bionic/__memcpy_chk.S
index a6eeca477..a8e9e83d0 100644
--- a/libc/arch-arm64/generic/bionic/__memcpy_chk.S
+++ b/libc/arch-arm64/generic/bionic/__memcpy_chk.S
@@ -43,3 +43,5 @@ ENTRY(__memcpy_chk)
bl __memcpy_chk_fail
END(__memcpy_chk)
+
+NOTE_GNU_PROPERTY()
diff --git a/libc/arch-arm64/generic/bionic/memcpy.S b/libc/arch-arm64/generic/bionic/memcpy.S
index baadb9204..bc1945c39 100644
--- a/libc/arch-arm64/generic/bionic/memcpy.S
+++ b/libc/arch-arm64/generic/bionic/memcpy.S
@@ -33,3 +33,5 @@
ENTRY(__memcpy)
#include "memcpy_base.S"
END(__memcpy)
+
+NOTE_GNU_PROPERTY()
diff --git a/libc/arch-arm64/generic/bionic/memmove.S b/libc/arch-arm64/generic/bionic/memmove.S
index 335b7d6ce..0f752ea4a 100644
--- a/libc/arch-arm64/generic/bionic/memmove.S
+++ b/libc/arch-arm64/generic/bionic/memmove.S
@@ -153,3 +153,5 @@ END(memmove)
ALIAS_SYMBOL(memcpy, memmove)
#endif
+
+NOTE_GNU_PROPERTY()
diff --git a/libc/arch-arm64/generic/bionic/memset.S b/libc/arch-arm64/generic/bionic/memset.S
index 12fc09db8..19d351098 100644
--- a/libc/arch-arm64/generic/bionic/memset.S
+++ b/libc/arch-arm64/generic/bionic/memset.S
@@ -249,3 +249,5 @@ L(zva_other):
b L(tail64)
END(memset)
+
+NOTE_GNU_PROPERTY()
diff --git a/libc/arch-arm64/generic/bionic/wmemmove.S b/libc/arch-arm64/generic/bionic/wmemmove.S
index e4f67f759..b1305300a 100644
--- a/libc/arch-arm64/generic/bionic/wmemmove.S
+++ b/libc/arch-arm64/generic/bionic/wmemmove.S
@@ -28,3 +28,5 @@
#define WMEMMOVE
#include "memmove.S"
#undef WMEMMOVE
+
+NOTE_GNU_PROPERTY()
diff --git a/libc/arch-arm64/static_function_dispatch.S b/libc/arch-arm64/static_function_dispatch.S
index 65a149202..161ece8ea 100644
--- a/libc/arch-arm64/static_function_dispatch.S
+++ b/libc/arch-arm64/static_function_dispatch.S
@@ -42,3 +42,5 @@ FUNCTION_DELEGATE(strcpy, __strcpy_aarch64_mte)
FUNCTION_DELEGATE(strlen, __strlen_aarch64_mte)
FUNCTION_DELEGATE(strrchr, __strrchr_aarch64_mte)
FUNCTION_DELEGATE(strncmp, __strncmp_aarch64_mte)
+
+NOTE_GNU_PROPERTY()
diff --git a/libc/arch-common/bionic/crtbegin.c b/libc/arch-common/bionic/crtbegin.c
index b7043dcae..1f8dfd2c6 100644
--- a/libc/arch-common/bionic/crtbegin.c
+++ b/libc/arch-common/bionic/crtbegin.c
@@ -49,7 +49,7 @@ __used static void _start_main(void* raw_args) {
#define POST "; .size _start, .-_start"
#if defined(__aarch64__)
-__asm__(PRE "mov x0,sp; b _start_main" POST);
+__asm__(PRE "/* BTI J */ hint #36; mov x0,sp; b _start_main" POST);
#elif defined(__arm__)
__asm__(PRE "mov r0,sp; b _start_main" POST);
#elif defined(__i386__)
diff --git a/libc/arch-common/bionic/crtbrand.S b/libc/arch-common/bionic/crtbrand.S
index 34d648062..3d80d7353 100644
--- a/libc/arch-common/bionic/crtbrand.S
+++ b/libc/arch-common/bionic/crtbrand.S
@@ -26,6 +26,12 @@
* SUCH DAMAGE.
*/
+#if defined(__aarch64__)
+#include <private/bionic_asm_arm64.h>
+
+__bionic_asm_custom_note_gnu_section()
+#endif
+
.section .note.android.ident,"a",%note
.balign 4
.type abitag, %object
diff --git a/libc/arch-common/bionic/crtend.S b/libc/arch-common/bionic/crtend.S
index 87d1120ab..0166428bc 100644
--- a/libc/arch-common/bionic/crtend.S
+++ b/libc/arch-common/bionic/crtend.S
@@ -28,6 +28,12 @@
#include "asm_multiarch.h"
+#if defined(__aarch64__)
+#include <private/bionic_asm_arm64.h>
+
+__bionic_asm_custom_note_gnu_section()
+#endif
+
.section .preinit_array, "aw"
ASM_ALIGN_TO_PTR_SIZE
ASM_PTR_SIZE(0)
diff --git a/libc/arch-common/bionic/crtend_so.S b/libc/arch-common/bionic/crtend_so.S
index e7b8cac3e..426d098d8 100644
--- a/libc/arch-common/bionic/crtend_so.S
+++ b/libc/arch-common/bionic/crtend_so.S
@@ -26,6 +26,12 @@
* SUCH DAMAGE.
*/
+#if defined(__aarch64__)
+#include <private/bionic_asm_arm64.h>
+
+__bionic_asm_custom_note_gnu_section()
+#endif
+
#if defined(__linux__) && defined(__ELF__)
.section .note.GNU-stack,"",%progbits
#endif
diff --git a/libc/private/bionic_asm.h b/libc/private/bionic_asm.h
index 6409563f2..6d4f7d52c 100644
--- a/libc/private/bionic_asm.h
+++ b/libc/private/bionic_asm.h
@@ -35,6 +35,7 @@
#define __bionic_asm_custom_entry(f)
#define __bionic_asm_custom_end(f)
#define __bionic_asm_function_type @function
+#define __bionic_asm_custom_note_gnu_section()
#if defined(__aarch64__)
#include <private/bionic_asm_arm64.h>
@@ -83,4 +84,7 @@
.globl alias; \
.equ alias, original
+#define NOTE_GNU_PROPERTY() \
+ __bionic_asm_custom_note_gnu_section()
+
#endif
diff --git a/libc/private/bionic_asm_arm64.h b/libc/private/bionic_asm_arm64.h
index 463ca312a..c11732ae8 100644
--- a/libc/private/bionic_asm_arm64.h
+++ b/libc/private/bionic_asm_arm64.h
@@ -41,3 +41,32 @@
#undef __bionic_asm_function_type
#define __bionic_asm_function_type %function
+
+#if defined(__ARM_FEATURE_BTI_DEFAULT)
+#define __bionic_asm_aarch64_feature_bti (1 << 0)
+#undef __bionic_asm_custom_entry
+#define __bionic_asm_custom_entry(f) hint #34 // BTI C
+#else
+#define __bionic_asm_aarch64_feature_bti 0
+#endif
+
+#if defined(__ARM_FEATURE_PAC_DEFAULT)
+#define __bionic_asm_aarch64_feature_pac (1 << 1)
+#else
+#define __bionic_asm_aarch64_feature_pac 0
+#endif
+
+#undef __bionic_asm_custom_note_gnu_section
+#define __bionic_asm_custom_note_gnu_section() \
+ .pushsection .note.gnu.property, "a"; \
+ .balign 8; \
+ .long 4; \
+ .long 0x10; \
+ .long 0x5; /* NT_GNU_PROPERTY_TYPE_0 */ \
+ .asciz "GNU"; \
+ .long 0xc0000000; /* GNU_PROPERTY_AARCH64_FEATURE_1_AND */ \
+ .long 4; \
+ .long (__bionic_asm_aarch64_feature_pac | \
+ __bionic_asm_aarch64_feature_bti); \
+ .long 0; \
+ .popsection; \
diff --git a/libc/tools/gensyscalls.py b/libc/tools/gensyscalls.py
index 0271a04c5..0e0e25f62 100755
--- a/libc/tools/gensyscalls.py
+++ b/libc/tools/gensyscalls.py
@@ -459,6 +459,8 @@ def main(arch, syscall_file):
if syscall.has_key("asm-%s" % arch):
print(syscall["asm-%s" % arch])
+ if arch == 'arm64':
+ print('\nNOTE_GNU_PROPERTY()\n')
if __name__ == "__main__":
if len(sys.argv) < 2:
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-03 14:06:37 +0000