--- /dev/null
+++ dyld/dyld-1340/mach_o/Fixups.cpp
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2017 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+#include "Fixups.h"
+
+namespace mach_o {
+
+const char* Fixup::keyName(uint8_t keyNum)
+{
+    assert(keyNum < 4);
+    static const char* const names[] = {
+        "IA", "IB", "DA", "DB"
+    };
+    return names[keyNum];
+}
+
+const char* Fixup::keyName() const
+{
+    assert(authenticated);
+    return keyName(this->auth.key);
+}
+
+bool Fixup::operator==(const Fixup& other) const
+{
+    if ( location != other.location )
+        return false;
+    if ( segment != other.segment )
+        return false;
+    if ( authenticated != other.authenticated )
+        return false;
+    if ( authenticated ) {
+        if ( auth.key != other.auth.key )
+            return false;
+        if ( auth.usesAddrDiversity != other.auth.usesAddrDiversity )
+            return false;
+        if ( auth.diversity != other.auth.diversity )
+            return false;
+    }
+    if ( isBind != other.isBind )
+        return false;
+    if ( isBind ) {
+        if ( bind.bindOrdinal != other.bind.bindOrdinal )
+            return false;
+        if ( bind.embeddedAddend != other.bind.embeddedAddend )
+            return false;
+    }
+    else {
+        if ( rebase.targetVmOffset != other.rebase.targetVmOffset )
+            return false;
+    }
+    return true;
+}
+
+
+} // namespace mach_o