diff --git a/libc/private/bionic_asm.h b/libc/private/bionic_asm.h
index 6409563..6d4f7d5 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 463ca31..c11732a 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 0271a04..0e0e25f 100755
--- a/libc/tools/gensyscalls.py
+++ b/libc/tools/gensyscalls.py
@@ -459,6 +459,8 @@
         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: