1 files changed, 88 insertions, 0 deletions
diff --git a/lldb/source/Plugins/Process/Utility/libunwind/src/RemoteDebuggerDummyUnwinder.hpp b/lldb/source/Plugins/Process/Utility/libunwind/src/RemoteDebuggerDummyUnwinder.hpp
new file mode 100644
index 00000000000..1db3faffd10
--- /dev/null
+++ b/lldb/source/Plugins/Process/Utility/libunwind/src/RemoteDebuggerDummyUnwinder.hpp
@@ -0,0 +1,88 @@
+/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 vi:set tabstop=4 expandtab: -*/
+//===-- RemoteDebuggerDummyUnwinder.hpp -------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// Code to unwind past a debugger's dummy frame inserted when it does an
+// inferior function call.
+// In this case we'll need to get the saved register context from the debugger -
+// it may be in the debugger's local memory or it may be saved in a nonstandard
+// location in the inferior process' memory.
+
+#ifndef __REMOTE_DEBUGGER_DUMMY_UNWINDER_HPP__
+#define __REMOTE_DEBUGGER_DUMMY_UNWINDER_HPP__
+
+#if defined (SUPPORT_REMOTE_UNWINDING)
+
+#include "libunwind.h"
+#include "Registers.hpp"
+#include "AddressSpace.hpp"
+#include "RemoteRegisterMap.hpp"
+#include "RemoteProcInfo.hpp"
+
+namespace lldb_private
+{
+
+template <typename A>
+int stepOutOfDebuggerDummyFrame (A& addressSpace, Registers_x86_64& registers,
+                                 RemoteProcInfo *procinfo, uint64_t ip, 
+                                uint64_t sp, void* arg) 
+{
+    Registers_x86_64 newRegisters(registers);
+    RemoteRegisterMap *rmap = addressSpace.getRemoteProcInfo()->getRegisterMap();
+    unw_word_t regv;
+    for (int i = UNW_X86_64_RAX; i <= UNW_X86_64_R15; i++) {
+        int driver_regnum;
+        if (!rmap->unwind_regno_to_caller_regno (i, driver_regnum))
+            continue;
+        if (addressSpace.accessors()->access_reg_inf_func_call (procinfo->wrap(), ip, sp, driver_regnum, &regv, 0, arg))
+            newRegisters.setRegister(i, regv);
+    }
+    if (!addressSpace.accessors()->access_reg_inf_func_call (procinfo->wrap(), ip, sp, rmap->caller_regno_for_ip(), &regv, 0, arg))
+        return UNW_EUNSPEC;
+    newRegisters.setIP (regv);
+    registers = newRegisters;
+    return UNW_STEP_SUCCESS;
+}
+
+template <typename A>
+int stepOutOfDebuggerDummyFrame (A& addressSpace, Registers_x86& registers,
+                                 RemoteProcInfo *procinfo, uint64_t ip, 
+                                uint64_t sp, void* arg)
+{
+    Registers_x86 newRegisters(registers);
+    RemoteRegisterMap *rmap = addressSpace.getRemoteProcInfo()->getRegisterMap();
+    unw_word_t regv;
+    for (int i = UNW_X86_EAX; i <= UNW_X86_EDI; i++) {
+        int driver_regnum;
+        if (!rmap->unwind_regno_to_caller_regno (i, driver_regnum))
+            continue;
+        if (addressSpace.accessors()->access_reg_inf_func_call (procinfo->wrap(), ip, sp, driver_regnum, &regv, 0, arg))
+            newRegisters.setRegister(i, regv);
+    }
+    if (!addressSpace.accessors()->access_reg_inf_func_call (procinfo->wrap(), ip, sp, rmap->caller_regno_for_ip(), &regv, 0, arg))
+        return UNW_EUNSPEC;
+    newRegisters.setIP (regv);
+    registers = newRegisters;
+    return UNW_STEP_SUCCESS;
+}
+
+template <typename A>
+int stepOutOfDebuggerDummyFrame (A& addressSpace, Registers_ppc& registers,
+                                 uint64_t ip, uint64_t sp) 
+{
+    ABORT ("stepping out of a debugger dummy frame not supported on ppc");
+    return UNW_EUNSPEC;
+}
+
+}; // namespace lldb_private
+
+#endif // SUPPORT_REMOTE_UNWINDING
+
+#endif // __REMOTE_DEBUGGER_DUMMY_UNWINDER_HPP__
+