Re-add change for https://reviews.llvm.org/D42582 with added directories.

llvm-svn: 327331

4 files changed, 125 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Architecture/CMakeLists.txt b/lldb/source/Plugins/Architecture/CMakeLists.txt
index 5abaa8e6823..01365a64cf9 100644
--- a/lldb/source/Plugins/Architecture/CMakeLists.txt
+++ b/lldb/source/Plugins/Architecture/CMakeLists.txt
@@ -1 +1,2 @@
 add_subdirectory(Arm)
+add_subdirectory(PPC64)
diff --git a/lldb/source/Plugins/Architecture/PPC64/ArchitecturePPC64.cpp b/lldb/source/Plugins/Architecture/PPC64/ArchitecturePPC64.cpp
new file mode 100644
index 00000000000..619de093aac
--- /dev/null
+++ b/lldb/source/Plugins/Architecture/PPC64/ArchitecturePPC64.cpp
@@ -0,0 +1,69 @@
+//===-- ArchitecturePPC64.cpp -----------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Plugins/Architecture/PPC64/ArchitecturePPC64.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Symbol/Function.h"
+#include "lldb/Symbol/Symbol.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/Thread.h"
+#include "lldb/Utility/ArchSpec.h"
+
+#include "llvm/BinaryFormat/ELF.h"
+
+using namespace lldb_private;
+using namespace lldb;
+
+ConstString ArchitecturePPC64::GetPluginNameStatic() {
+  return ConstString("ppc64");
+}
+
+void ArchitecturePPC64::Initialize() {
+  PluginManager::RegisterPlugin(GetPluginNameStatic(),
+                                "PPC64-specific algorithms",
+                                &ArchitecturePPC64::Create);
+}
+
+void ArchitecturePPC64::Terminate() {
+  PluginManager::UnregisterPlugin(&ArchitecturePPC64::Create);
+}
+
+std::unique_ptr<Architecture> ArchitecturePPC64::Create(const ArchSpec &arch) {
+  if ((arch.GetMachine() != llvm::Triple::ppc64 &&
+       arch.GetMachine() != llvm::Triple::ppc64le) ||
+      arch.GetTriple().getObjectFormat() != llvm::Triple::ObjectFormatType::ELF)
+    return nullptr;
+  return std::unique_ptr<Architecture>(new ArchitecturePPC64());
+}
+
+ConstString ArchitecturePPC64::GetPluginName() { return GetPluginNameStatic(); }
+uint32_t ArchitecturePPC64::GetPluginVersion() { return 1; }
+
+static int32_t GetLocalEntryOffset(const Symbol &sym) {
+  unsigned char other = sym.GetFlags() >> 8 & 0xFF;
+  return llvm::ELF::decodePPC64LocalEntryOffset(other);
+}
+
+size_t ArchitecturePPC64::GetBytesToSkip(Symbol &func,
+                                         const Address &curr_addr) const {
+  if (curr_addr.GetFileAddress() ==
+      func.GetFileAddress() + GetLocalEntryOffset(func))
+    return func.GetPrologueByteSize();
+  return 0;
+}
+
+void ArchitecturePPC64::AdjustBreakpointAddress(const Symbol &func,
+                                                Address &addr) const {
+  int32_t loffs = GetLocalEntryOffset(func);
+  if (!loffs)
+    return;
+
+  addr.SetOffset(addr.GetOffset() + loffs);
+}
diff --git a/lldb/source/Plugins/Architecture/PPC64/ArchitecturePPC64.h b/lldb/source/Plugins/Architecture/PPC64/ArchitecturePPC64.h
new file mode 100644
index 00000000000..6c87471b548
--- /dev/null
+++ b/lldb/source/Plugins/Architecture/PPC64/ArchitecturePPC64.h
@@ -0,0 +1,44 @@
+//===-- ArchitecturePPC64.h -------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_PLUGIN_ARCHITECTURE_PPC64_H
+#define LLDB_PLUGIN_ARCHITECTURE_PPC64_H
+
+#include "lldb/Core/Architecture.h"
+
+namespace lldb_private {
+
+class ArchitecturePPC64 : public Architecture {
+public:
+  static ConstString GetPluginNameStatic();
+  static void Initialize();
+  static void Terminate();
+
+  ConstString GetPluginName() override;
+  uint32_t GetPluginVersion() override;
+
+  void OverrideStopInfo(Thread &thread) override {}
+
+  //------------------------------------------------------------------
+  /// This method compares current address with current function's
+  /// local entry point, returning the bytes to skip if they match.
+  //------------------------------------------------------------------
+  size_t GetBytesToSkip(Symbol &func, const Address &curr_addr) const override;
+
+  void AdjustBreakpointAddress(const Symbol &func,
+                               Address &addr) const override;
+
+private:
+  static std::unique_ptr<Architecture> Create(const ArchSpec &arch);
+  ArchitecturePPC64() = default;
+};
+
+} // namespace lldb_private
+
+#endif // LLDB_PLUGIN_ARCHITECTURE_PPC64_H
diff --git a/lldb/source/Plugins/Architecture/PPC64/CMakeLists.txt b/lldb/source/Plugins/Architecture/PPC64/CMakeLists.txt
new file mode 100644
index 00000000000..2cba112cf88
--- /dev/null
+++ b/lldb/source/Plugins/Architecture/PPC64/CMakeLists.txt
@@ -0,0 +1,11 @@
+add_lldb_library(lldbPluginArchitecturePPC64 PLUGIN
+  ArchitecturePPC64.cpp
+
+  LINK_LIBS
+    lldbPluginProcessUtility
+    lldbCore
+    lldbTarget
+    lldbUtility
+  LINK_COMPONENTS
+    Support
+  )