--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cpu/ppc/vm/runtime_ppc.cpp	Wed Dec 11 00:06:11 2013 +0100
@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2012, 2013 SAP AG. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#ifdef COMPILER2
+#include "asm/assembler.inline.hpp"
+#include "asm/macroAssembler.inline.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "code/vmreg.hpp"
+#include "interpreter/interpreter.hpp"
+#include "nativeInst_ppc.hpp"
+#include "opto/runtime.hpp"
+#include "runtime/interfaceSupport.hpp"
+#include "runtime/sharedRuntime.hpp"
+#include "runtime/stubRoutines.hpp"
+#include "runtime/vframeArray.hpp"
+#include "utilities/globalDefinitions.hpp"
+#include "vmreg_ppc.inline.hpp"
+#endif
+
+#define __ masm->
+
+
+#ifdef COMPILER2
+
+// SP adjustment (must use unextended SP) for method handle call sites
+// during exception handling.
+static intptr_t adjust_SP_for_methodhandle_callsite(JavaThread *thread) {
+  RegisterMap map(thread, false);
+  // The frame constructor will do the correction for us (see frame::adjust_unextended_SP).
+  frame mh_caller_frame = thread->last_frame().sender(&map);
+  assert(mh_caller_frame.is_compiled_frame(), "Only may reach here for compiled MH call sites");
+  return (intptr_t) mh_caller_frame.unextended_sp();
+}
+
+//------------------------------generate_exception_blob---------------------------
+// Creates exception blob at the end.
+// Using exception blob, this code is jumped from a compiled method.
+//
+// Given an exception pc at a call we call into the runtime for the
+// handler in this method. This handler might merely restore state
+// (i.e. callee save registers) unwind the frame and jump to the
+// exception handler for the nmethod if there is no Java level handler
+// for the nmethod.
+//
+// This code is entered with a jmp.
+//
+// Arguments:
+//   R3_ARG1: exception oop
+//   R4_ARG2: exception pc
+//
+// Results:
+//   R3_ARG1: exception oop
+//   R4_ARG2: exception pc in caller
+//   destination: exception handler of caller
+//
+// Note: the exception pc MUST be at a call (precise debug information)
+//
+void OptoRuntime::generate_exception_blob() {
+  // Allocate space for the code.
+  ResourceMark rm;
+  // Setup code generation tools.
+  CodeBuffer buffer("exception_blob", 2048, 1024);
+  InterpreterMacroAssembler* masm = new InterpreterMacroAssembler(&buffer);
+
+  address start = __ pc();
+
+  int frame_size_in_bytes = frame::abi_112_size;
+  OopMap* map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
+
+  // Exception pc is 'return address' for stack walker.
+  __ std(R4_ARG2/*exception pc*/, _abi(lr), R1_SP);
+
+  // Store the exception in the Thread object.
+  __ std(R3_ARG1/*exception oop*/, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
+  __ std(R4_ARG2/*exception pc*/,  in_bytes(JavaThread::exception_pc_offset()),  R16_thread);
+
+  // Save callee-saved registers.
+  // Push a C frame for the exception blob. It is needed for the C call later on.
+  __ push_frame_abi112(0, R11_scratch1);
+
+  // This call does all the hard work. It checks if an exception handler
+  // exists in the method.
+  // If so, it returns the handler address.
+  // If not, it prepares for stack-unwinding, restoring the callee-save
+  // registers of the frame being removed.
+  __ set_last_Java_frame(/*sp=*/R1_SP, noreg);
+
+  __ mr(R3_ARG1, R16_thread);
+  __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, OptoRuntime::handle_exception_C),
+            relocInfo::none);
+  address calls_return_pc = __ last_calls_return_pc();
+# ifdef ASSERT
+  __ cmpdi(CCR0, R3_RET, 0);
+  __ asm_assert_ne("handle_exception_C must not return NULL", 0x601);
+# endif
+
+  // Set an oopmap for the call site. This oopmap will only be used if we
+  // are unwinding the stack. Hence, all locations will be dead.
+  // Callee-saved registers will be the same as the frame above (i.e.,
+  // handle_exception_stub), since they were restored when we got the
+  // exception.
+  OopMapSet* oop_maps = new OopMapSet();
+  oop_maps->add_gc_map(calls_return_pc - start, map);
+
+  // Get unextended_sp for method handle call sites.
+  Label mh_callsite, mh_done; // Use a 2nd c call if it's a method handle call site.
+  __ lwa(R4_ARG2, in_bytes(JavaThread::is_method_handle_return_offset()), R16_thread);
+  __ cmpwi(CCR0, R4_ARG2, 0);
+  __ bne(CCR0, mh_callsite);
+
+  __ mtctr(R3_RET); // Move address of exception handler to SR_CTR.
+  __ reset_last_Java_frame();
+  __ pop_frame();
+
+  __ bind(mh_done);
+  // We have a handler in register SR_CTR (could be deopt blob).
+
+  // Get the exception oop.
+  __ ld(R3_ARG1, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
+
+  // Get the exception pc in case we are deoptimized.
+  __ ld(R4_ARG2, in_bytes(JavaThread::exception_pc_offset()), R16_thread);
+
+  // Reset thread values.
+  __ li(R0, 0);
+#ifdef ASSERT
+  __ std(R0, in_bytes(JavaThread::exception_handler_pc_offset()), R16_thread);
+  __ std(R0, in_bytes(JavaThread::exception_pc_offset()), R16_thread);
+#endif
+  // Clear the exception oop so GC no longer processes it as a root.
+  __ std(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
+
+  // Move exception pc into SR_LR.
+  __ mtlr(R4_ARG2);
+  __ bctr();
+
+
+  // Same as above, but also set sp to unextended_sp.
+  __ bind(mh_callsite);
+  __ mr(R31, R3_RET); // Save branch address.
+  __ mr(R3_ARG1, R16_thread);
+  __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, adjust_SP_for_methodhandle_callsite), relocInfo::none);
+  // Returns unextended_sp in R3_RET.
+
+  __ mtctr(R31); // Move address of exception handler to SR_CTR.
+  __ reset_last_Java_frame();
+
+  __ mr(R1_SP, R3_RET); // Set sp to unextended_sp.
+  __ b(mh_done);
+
+
+  // Make sure all code is generated.
+  masm->flush();
+
+  // Set exception blob.
+  _exception_blob = ExceptionBlob::create(&buffer, oop_maps,
+                                          frame_size_in_bytes/wordSize);
+}
+
+#endif // COMPILER2