Define and use a a new MDRawContextARM64

This struct matches the layout defined by Microsoft and replaces
Breakpad's MDRawContextARM64_Old. This CL updates the processor to
understand either the old or new structs, but clients continue to write
the old structs.

Change-Id: I8dedd9ddb2ec083b802723b9ac87beb18d98edbd
Reviewed-on: https://chromium-review.googlesource.com/1155938
Reviewed-by: Mark Mentovai <mark@chromium.org>

1 files changed, 67 insertions, 0 deletions

diff --git a/src/processor/convert_old_arm64_context.cc b/src/processor/convert_old_arm64_context.cc
new file mode 100644
index 00000000..d4b749e7
--- /dev/null
+++ b/src/processor/convert_old_arm64_context.cc
@@ -0,0 +1,67 @@
+// Copyright (c) 2018, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "processor/convert_old_arm64_context.h"
+
+#include <string.h>
+
+namespace google_breakpad {
+
+void ConvertOldARM64Context(const MDRawContextARM64_Old& old,
+                            MDRawContextARM64* context) {
+  context->context_flags = MD_CONTEXT_ARM64;
+  if (old.context_flags & MD_CONTEXT_ARM64_INTEGER_OLD) {
+    context->context_flags |=
+        MD_CONTEXT_ARM64_INTEGER | MD_CONTEXT_ARM64_CONTROL;
+  }
+  if (old.context_flags & MD_CONTEXT_ARM64_FLOATING_POINT_OLD) {
+    context->context_flags |= MD_CONTEXT_ARM64_FLOATING_POINT;
+  }
+
+  context->cpsr = old.cpsr;
+
+  static_assert(sizeof(old.iregs) == sizeof(context->iregs),
+                "iregs size mismatch");
+  memcpy(context->iregs, old.iregs, sizeof(context->iregs));
+
+  static_assert(sizeof(old.float_save.regs) == sizeof(context->float_save.regs),
+                "float_save.regs size mismatch");
+  memcpy(context->float_save.regs,
+         old.float_save.regs,
+         sizeof(context->float_save.regs));
+  context->float_save.fpcr = old.float_save.fpcr;
+  context->float_save.fpsr = old.float_save.fpsr;
+
+  memset(context->bcr, 0, sizeof(context->bcr));
+  memset(context->bvr, 0, sizeof(context->bvr));
+  memset(context->wcr, 0, sizeof(context->wcr));
+  memset(context->wvr, 0, sizeof(context->wvr));
+}
+
+}  // namespace google_breakpad