Basic arm cpu support for processor. r=mark at http://breakpad.appspot.com/49011

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@454 4c0a9323-5329-0410-9bdc-e9ce6186880e

2 files changed, 32 insertions, 3 deletions

diff --git a/src/google_breakpad/processor/minidump.h b/src/google_breakpad/processor/minidump.h
index 695a7254..2a83c3f0 100644
--- a/src/google_breakpad/processor/minidump.h
+++ b/src/google_breakpad/processor/minidump.h
@@ -179,10 +179,11 @@ class MinidumpContext : public MinidumpStream {
   // Returns raw CPU-specific context data for the named CPU type.  If the
   // context data does not match the CPU type or does not exist, returns
   // NULL.
-  const MDRawContextX86*   GetContextX86() const;
-  const MDRawContextPPC*   GetContextPPC() const;
   const MDRawContextAMD64* GetContextAMD64() const;
+  const MDRawContextARM*   GetContextARM() const;
+  const MDRawContextPPC*   GetContextPPC() const;
   const MDRawContextSPARC* GetContextSPARC() const;
+  const MDRawContextX86*   GetContextX86() const;
  
   // Print a human-readable representation of the object to stdout.
   void Print();
@@ -216,7 +217,8 @@ class MinidumpContext : public MinidumpStream {
     MDRawContextAMD64* amd64;
     // on Solaris SPARC, sparc is defined as a numeric constant,
     // so variables can NOT be named as sparc
-    MDRawContextSPARC*  ctx_sparc;
+    MDRawContextSPARC* ctx_sparc;
+    MDRawContextARM*   arm;
   } context_;
 };
 
diff --git a/src/google_breakpad/processor/stack_frame_cpu.h b/src/google_breakpad/processor/stack_frame_cpu.h
index 3d3003b7..1e414638 100644
--- a/src/google_breakpad/processor/stack_frame_cpu.h
+++ b/src/google_breakpad/processor/stack_frame_cpu.h
@@ -168,6 +168,33 @@ struct StackFrameSPARC : public StackFrame {
   int context_validity;
 };
 
+struct StackFrameARM : public StackFrame {
+  // ContextValidity should eventually contain entries for the validity of
+  // other nonvolatile (callee-save) registers as in
+  // StackFrameX86::ContextValidity. I suspect this list is sufficient
+  // for arm stackwalking.
+  enum ContextValidity {
+    CONTEXT_VALID_NONE = 0,
+    CONTEXT_VALID_R13 = 1 << 0,
+    CONTEXT_VALID_R14 = 1 << 1,
+    CONTEXT_VALID_R15 = 1 << 2,
+    CONTEXT_VALID_ALL = -1
+  };
+
+  StackFrameARM() : context(), context_validity(CONTEXT_VALID_NONE) {}
+
+  // Register state.  This is only fully valid for the topmost frame in a
+  // stack.  In other frames, the values of nonvolatile registers may be
+  // present, given sufficient debugging information.  Refer to
+  // context_validity.
+  MDRawContextARM context;
+
+  // context_validity is actually ContextValidity, but int is used because
+  // the OR operator doesn't work well with enumerated types.  This indicates
+  // which fields in context are valid.
+  int context_validity;
+};
+
 }  // namespace google_breakpad
 
 #endif  // GOOGLE_BREAKPAD_PROCESSOR_STACK_FRAME_CPU_H__