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
2009-12-19 21:43:53 +00:00 · 2009-12-19 21:43:53 +00:00 · 9276b0d301
commit 9276b0d301
parent 7a77f45f79
10 changed files with 469 additions and 9 deletions
--- a/src/processor/stackwalker_arm.cc
+++ b/src/processor/stackwalker_arm.cc
@ -0,0 +1,92 @@
+// Copyright (c) 2009, 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.
+
+// stackwalker_arm.cc: arm-specific stackwalker.
+//
+// See stackwalker_arm.h for documentation.
+//
+// Author: Mark Mentovai, Ted Mielczarek
+
+
+#include "processor/stackwalker_arm.h"
+#include "google_breakpad/processor/call_stack.h"
+#include "google_breakpad/processor/memory_region.h"
+#include "google_breakpad/processor/stack_frame_cpu.h"
+#include "processor/logging.h"
+
+namespace google_breakpad {
+
+
+StackwalkerARM::StackwalkerARM(const SystemInfo *system_info,
+                               const MDRawContextARM *context,
+                               MemoryRegion *memory,
+                               const CodeModules *modules,
+                               SymbolSupplier *supplier,
+                               SourceLineResolverInterface *resolver)
+    : Stackwalker(system_info, memory, modules, supplier, resolver),
+      context_(context) {
+}
+
+
+StackFrame* StackwalkerARM::GetContextFrame() {
+  if (!context_ || !memory_) {
+    BPLOG(ERROR) << "Can't get context frame without context or memory";
+    return NULL;
+  }
+
+  StackFrameARM *frame = new StackFrameARM();
+
+  // The instruction pointer is stored directly in a register (r15), so pull it
+  // straight out of the CPU context structure.
+  frame->context = *context_;
+  frame->context_validity = StackFrameARM::CONTEXT_VALID_ALL;
+  frame->instruction = frame->context.iregs[15];
+
+  return frame;
+}
+
+
+StackFrame* StackwalkerARM::GetCallerFrame(
+    const CallStack *stack,
+    const vector< linked_ptr<StackFrameInfo> > &stack_frame_info) {
+  if (!memory_ || !stack) {
+    BPLOG(ERROR) << "Can't get caller frame without memory or stack";
+    return NULL;
+  }
+
+  StackFrameARM *last_frame = static_cast<StackFrameARM*>(
+      stack->frames()->back());
+
+  // TODO: Can't actually walk the stack on ARM without the CFI data.
+  // Implement this when the CFI symbol dumper changes have landed.
+  return NULL;
+}
+
+
+}  // namespace google_breakpad