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

src/cpu/ppc/vm/relocInfo_ppc.cpp@41b780b43b74 (annotated)

src/cpu/ppc/vm/relocInfo_ppc.cpp

Wed, 27 Nov 2013 16:16:21 -0800

author: goetz
date: Wed, 27 Nov 2013 16:16:21 -0800
changeset 6490: 41b780b43b74
parent 6463: 7687c56b6693
child 6876: 710a3c8b516e
child 8647: 0b611970fa8b
permissions: -rw-r--r--

8029015: PPC64 (part 216): opto: trap based null and range checks
Summary: On PPC64 use tdi instruction that does a compare and raises SIGTRAP for NULL and range checks.
Reviewed-by: kvn

 /*
  * Copyright (c) 2000, 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"
 #include "asm/assembler.inline.hpp"
 #include "assembler_ppc.inline.hpp"
 #include "code/relocInfo.hpp"
 #include "nativeInst_ppc.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/safepoint.hpp"
 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) {
   bool copy_back_to_oop_pool = true;  // TODO: PPC port
   // The following comment is from the declaration of DataRelocation:
   //
   //  "The "o" (displacement) argument is relevant only to split relocations
   //   on RISC machines.  In some CPUs (SPARC), the set-hi and set-lo ins'ns
   //   can encode more than 32 bits between them.  This allows compilers to
   //   share set-hi instructions between addresses that differ by a small
   //   offset (e.g., different static variables in the same class).
   //   On such machines, the "x" argument to set_value on all set-lo
   //   instructions must be the same as the "x" argument for the
   //   corresponding set-hi instructions.  The "o" arguments for the
   //   set-hi instructions are ignored, and must not affect the high-half
   //   immediate constant.  The "o" arguments for the set-lo instructions are
   //   added into the low-half immediate constant, and must not overflow it."
   //
   // Currently we don't support splitting of relocations, so o must be
   // zero:
   assert(o == 0, "tried to split relocations");
   if (!verify_only) {
     if (format() != 1) {
       nativeMovConstReg_at(addr())->set_data_plain(((intptr_t)x), code());
     } else {
       assert(type() == relocInfo::oop_type || type() == relocInfo::metadata_type,
              "how to encode else?");
       narrowOop no = (type() == relocInfo::oop_type) ?
         oopDesc::encode_heap_oop((oop)x) : Klass::encode_klass((Klass*)x);
       nativeMovConstReg_at(addr())->set_narrow_oop(no, code());
     }
   } else {
     assert((address) (nativeMovConstReg_at(addr())->data()) == x, "data must match");
   }
 }
 address Relocation::pd_call_destination(address orig_addr) {
   intptr_t adj = 0;
   address inst_loc = addr();
   if (orig_addr != NULL) {
     // We just moved this call instruction from orig_addr to addr().
     // This means its target will appear to have grown by addr() - orig_addr.
     adj = -(inst_loc - orig_addr);
   }
   if (NativeFarCall::is_far_call_at(inst_loc)) {
     NativeFarCall* call = nativeFarCall_at(inst_loc);
     return call->destination() + (intptr_t)(call->is_pcrelative() ? adj : 0);
   } else if (NativeJump::is_jump_at(inst_loc)) {
     NativeJump* jump = nativeJump_at(inst_loc);
     return jump->jump_destination() + (intptr_t)(jump->is_pcrelative() ? adj : 0);
   } else if (NativeConditionalFarBranch::is_conditional_far_branch_at(inst_loc)) {
     NativeConditionalFarBranch* branch = NativeConditionalFarBranch_at(inst_loc);
     return branch->branch_destination();
   } else {
     // There are two instructions at the beginning of a stub, therefore we
     // load at orig_addr + 8.
     orig_addr = nativeCall_at(inst_loc)->get_trampoline();
     if (orig_addr == NULL) {
       return (address) -1;
     } else {
       return (address) nativeMovConstReg_at(orig_addr + 8)->data();
     }
   }
 }
 void Relocation::pd_set_call_destination(address x) {
   address inst_loc = addr();
   if (NativeFarCall::is_far_call_at(inst_loc)) {
     NativeFarCall* call = nativeFarCall_at(inst_loc);
     call->set_destination(x);
   } else if (NativeJump::is_jump_at(inst_loc)) {
     NativeJump* jump= nativeJump_at(inst_loc);
     jump->set_jump_destination(x);
   } else if (NativeConditionalFarBranch::is_conditional_far_branch_at(inst_loc)) {
     NativeConditionalFarBranch* branch = NativeConditionalFarBranch_at(inst_loc);
     branch->set_branch_destination(x);
   } else {
     NativeCall* call = nativeCall_at(inst_loc);
     call->set_destination_mt_safe(x, false);
   }
 }
 address* Relocation::pd_address_in_code() {
   ShouldNotReachHere();
   return 0;
 }
 address Relocation::pd_get_address_from_code() {
   return (address)(nativeMovConstReg_at(addr())->data());
 }
 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
 }
 void poll_return_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
 }
 void metadata_Relocation::pd_fix_value(address x) {
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/ppc/vm/relocInfo_ppc.cpp@41b780b43b74 (annotated)

src/cpu/ppc/vm/relocInfo_ppc.cpp