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 /*

  * 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.

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  */

 #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) {

 }