1 files changed, 80 insertions, 0 deletions
diff --git a/src/assembly.h b/src/assembly.h
new file mode 100644
index 000000000000..f46a24d0eed9
--- /dev/null
+++ b/src/assembly.h
@@ -0,0 +1,80 @@
+/* ===-- assembly.h - libUnwind assembler support macros -------------------===
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file is dual licensed under the MIT and the University of Illinois Open
+ * Source Licenses. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ *
+ * This file defines macros for use in libUnwind assembler source.
+ * This file is not part of the interface of this library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#ifndef UNWIND_ASSEMBLY_H
+#define UNWIND_ASSEMBLY_H
+
+#if defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__)
+#define SEPARATOR @
+#elif defined(__arm64__)
+#define SEPARATOR %%
+#else
+#define SEPARATOR ;
+#endif
+
+#if defined(__APPLE__)
+#define HIDDEN_DIRECTIVE .private_extern
+#else
+#define HIDDEN_DIRECTIVE .hidden
+#endif
+
+#define GLUE2(a, b) a ## b
+#define GLUE(a, b) GLUE2(a, b)
+#define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
+
+#if defined(__APPLE__)
+#define SYMBOL_IS_FUNC(name)
+#elif defined(__ELF__)
+#if defined(__arm__)
+#define SYMBOL_IS_FUNC(name) .type name,%function
+#else
+#define SYMBOL_IS_FUNC(name) .type name,@function
+#endif
+#else
+#define SYMBOL_IS_FUNC(name)                                                   \
+  .def name SEPARATOR                                                          \
+    .scl 2 SEPARATOR                                                           \
+    .type 32 SEPARATOR                                                         \
+  .endef
+#endif
+
+#define DEFINE_LIBUNWIND_FUNCTION(name)                   \
+  .globl SYMBOL_NAME(name) SEPARATOR                      \
+  SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR             \
+  SYMBOL_NAME(name):
+
+#define DEFINE_LIBUNWIND_PRIVATE_FUNCTION(name)           \
+  .globl SYMBOL_NAME(name) SEPARATOR                      \
+  HIDDEN_DIRECTIVE SYMBOL_NAME(name) SEPARATOR            \
+  SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR             \
+  SYMBOL_NAME(name):
+
+#if defined(__arm__)
+#if !defined(__ARM_ARCH)
+#define __ARM_ARCH 4
+#endif
+
+#if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5
+#define ARM_HAS_BX
+#endif
+
+#ifdef ARM_HAS_BX
+#define JMP(r) bx r
+#else
+#define JMP(r) mov pc, r
+#endif
+#endif /* __arm__ */
+
+#endif /* UNWIND_ASSEMBLY_H */