jdk8-mips64-public/hotspot: src/cpu/ppc/vm/runtime

src/cpu/ppc/vm/runtime_ppc.cpp@31e80afe3fed (annotated)

src/cpu/ppc/vm/runtime_ppc.cpp

Thu, 06 Mar 2014 10:55:28 -0800

author: goetz
date: Thu, 06 Mar 2014 10:55:28 -0800
changeset 6511: 31e80afe3fed
parent 6495: 67fa91961822
child 6876: 710a3c8b516e
permissions: -rw-r--r--

8035647: PPC64: Support for elf v2 abi.
Summary: ELFv2 ABI used by the little endian PowerPC64 on Linux.
Reviewed-by: kvn
Contributed-by: asmundak@google.com

 /*
  * 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_reg_args_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_reg_args(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);
 #if defined(ABI_ELFv2)
   __ call_c((address) OptoRuntime::handle_exception_C, relocInfo::none);
 #else
   __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, OptoRuntime::handle_exception_C),
             relocInfo::none);
 #endif
   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);
 #if defined(ABI_ELFv2)
   __ call_c((address) adjust_SP_for_methodhandle_callsite, relocInfo::none);
 #else
   __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, adjust_SP_for_methodhandle_callsite), relocInfo::none);
 #endif
   // 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

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/ppc/vm/runtime_ppc.cpp@31e80afe3fed (annotated)

src/cpu/ppc/vm/runtime_ppc.cpp