1 files changed, 68 insertions, 0 deletions
diff --git a/include/exec/helper-proto.h.inc b/include/exec/helper-proto.h.inc
new file mode 100644
index 0000000..c3aa666
--- /dev/null
+++ b/include/exec/helper-proto.h.inc
@@ -0,0 +1,68 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Helper file for declaring TCG helper functions.
+ * This one expands prototypes for the helper functions.
+ * Define HELPER_H for the header file to be expanded.
+ */
+
+#include "exec/helper-head.h"
+
+/*
+ * Work around an issue with --enable-lto, in which GCC's ipa-split pass
+ * decides to split out the noreturn code paths that raise an exception,
+ * taking the __builtin_return_address() along into the new function,
+ * where it no longer computes a value that returns to TCG generated code.
+ * Despite the name, the noinline attribute affects splitter, so this
+ * prevents the optimization in question.  Given that helpers should not
+ * otherwise be called directly, this should not have any other visible effect.
+ *
+ * See https://gitlab.com/qemu-project/qemu/-/issues/1454
+ */
+#define DEF_HELPER_ATTR  __attribute__((noinline))
+
+#define DEF_HELPER_FLAGS_0(name, flags, ret) \
+dh_ctype(ret) HELPER(name) (void) DEF_HELPER_ATTR;
+
+#define DEF_HELPER_FLAGS_1(name, flags, ret, t1) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1)) DEF_HELPER_ATTR;
+
+#define DEF_HELPER_FLAGS_2(name, flags, ret, t1, t2) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2)) DEF_HELPER_ATTR;
+
+#define DEF_HELPER_FLAGS_3(name, flags, ret, t1, t2, t3) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2), \
+                            dh_ctype(t3)) DEF_HELPER_ATTR;
+
+#define DEF_HELPER_FLAGS_4(name, flags, ret, t1, t2, t3, t4) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2), dh_ctype(t3), \
+                            dh_ctype(t4)) DEF_HELPER_ATTR;
+
+#define DEF_HELPER_FLAGS_5(name, flags, ret, t1, t2, t3, t4, t5) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2), dh_ctype(t3), \
+                            dh_ctype(t4), dh_ctype(t5)) DEF_HELPER_ATTR;
+
+#define DEF_HELPER_FLAGS_6(name, flags, ret, t1, t2, t3, t4, t5, t6) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2), dh_ctype(t3), \
+                            dh_ctype(t4), dh_ctype(t5), \
+                            dh_ctype(t6)) DEF_HELPER_ATTR;
+
+#define DEF_HELPER_FLAGS_7(name, flags, ret, t1, t2, t3, t4, t5, t6, t7) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2), dh_ctype(t3), \
+                            dh_ctype(t4), dh_ctype(t5), dh_ctype(t6), \
+                            dh_ctype(t7)) DEF_HELPER_ATTR;
+
+#define IN_HELPER_PROTO
+
+#include HELPER_H
+
+#undef IN_HELPER_PROTO
+
+#undef DEF_HELPER_FLAGS_0
+#undef DEF_HELPER_FLAGS_1
+#undef DEF_HELPER_FLAGS_2
+#undef DEF_HELPER_FLAGS_3
+#undef DEF_HELPER_FLAGS_4
+#undef DEF_HELPER_FLAGS_5
+#undef DEF_HELPER_FLAGS_6
+#undef DEF_HELPER_FLAGS_7
+#undef DEF_HELPER_ATTR