================
@@ -0,0 +1,22 @@
+typedef void* Ptr;
+typedef struct { Ptr addr, toc, env; } Descr;
+typedef struct { Descr* desc; Ptr (*resolver)(); } IFUNC_PAIR;
+
+// A zero-length entry in section "ifunc_sec" to satisfy the __start_ifunc_sec
+// and __stop_ifunc_sec references in this file, when no user code has any.
+__attribute__((section("ifunc_sec"))) static int dummy_ifunc_sec[0];
+
+extern IFUNC_PAIR __start_ifunc_sec, __stop_ifunc_sec;
+
+__attribute__((constructor))
+void __init_ifuncs() {
+ void *volatile ref = &dummy_ifunc_sec; // hack to keep dummy_ifunc_sec alive
+
+ // hack to prevent compiler from assuming __start_ifunc_sec and
+ // __stop_ifunc_sec occupy different addresses.
+ IFUNC_PAIR *volatile volatile_end = &__stop_ifunc_sec;
----------------
diggerlin wrote:
why need `*volatile` here ? since `volatile_end` only be used once, I do not
think we need to have it.
https://github.com/llvm/llvm-project/pull/153049
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
