Due to xonly on arm64 it is no longer possible to read the testfly routine.

Put it in the rodata section allowing it to be copied. Note that testfly is
never executed directly but only after placing it in a separate chunk of memory
allowing its permissions to be mutated.

diff --git a/regress/sys/kern/noexec/testfly.S b/regress/sys/kern/noexec/testfly.S
index 4e78c8d..dc40440 100644 (file)
--- a/regress/sys/kern/noexec/testfly.S
+++ b/regress/sys/kern/noexec/testfly.S
@@ -1,4 +1,4 @@
-/*     $OpenBSD: testfly.S,v 1.10 2021/06/20 16:48:50 deraadt Exp $    */
+/*     $OpenBSD: testfly.S,v 1.11 2023/01/08 06:56:01 anton Exp $      */
 
 /*
  * Copyright (c) 2002,2003 Michael Shalayeff
@@ -32,7 +32,16 @@
 
        .space 16384
 
-#if defined(__aarch64__) || defined(__amd64__) || defined(__i386__)
+#if defined(__aarch64__)
+       .section .rodata
+       .globl  testfly
+       .type   testfly,#function
+testfly:
+       ret
+END(testfly)
+#endif
+
+#if defined(__amd64__) || defined(__i386__)
 ENTRY(testfly)
        ret
 END(testfly)