128 lines
5.0 KiB
C++
128 lines
5.0 KiB
C++
/*
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* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
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* Copyright 2012, 2015 SAP AG. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "asm/assembler.inline.hpp"
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#include "code/relocInfo.hpp"
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#include "nativeInst_ppc.hpp"
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#include "oops/klass.inline.hpp"
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#include "oops/oop.inline.hpp"
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#include "runtime/safepoint.hpp"
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void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) {
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// The following comment is from the declaration of DataRelocation:
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//
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// "The "o" (displacement) argument is relevant only to split relocations
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// on RISC machines. In some CPUs (SPARC), the set-hi and set-lo ins'ns
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// can encode more than 32 bits between them. This allows compilers to
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// share set-hi instructions between addresses that differ by a small
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// offset (e.g., different static variables in the same class).
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// On such machines, the "x" argument to set_value on all set-lo
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// instructions must be the same as the "x" argument for the
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// corresponding set-hi instructions. The "o" arguments for the
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// set-hi instructions are ignored, and must not affect the high-half
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// immediate constant. The "o" arguments for the set-lo instructions are
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// added into the low-half immediate constant, and must not overflow it."
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//
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// Currently we don't support splitting of relocations, so o must be
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// zero:
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assert(o == 0, "tried to split relocations");
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if (!verify_only) {
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if (format() != 1) {
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nativeMovConstReg_at(addr())->set_data_plain(((intptr_t)x), code());
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} else {
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assert(type() == relocInfo::oop_type || type() == relocInfo::metadata_type,
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"how to encode else?");
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narrowOop no = (type() == relocInfo::oop_type) ?
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oopDesc::encode_heap_oop((oop)x) : Klass::encode_klass((Klass*)x);
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nativeMovConstReg_at(addr())->set_narrow_oop(no, code());
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}
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} else {
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guarantee((address) (nativeMovConstReg_at(addr())->data()) == x, "data must match");
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}
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}
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address Relocation::pd_call_destination(address orig_addr) {
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intptr_t adj = 0;
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address inst_loc = addr();
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if (orig_addr != NULL) {
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// We just moved this call instruction from orig_addr to addr().
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// This means its target will appear to have grown by addr() - orig_addr.
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adj = -(inst_loc - orig_addr);
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}
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if (NativeFarCall::is_far_call_at(inst_loc)) {
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NativeFarCall* call = nativeFarCall_at(inst_loc);
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return call->destination() + (intptr_t)(call->is_pcrelative() ? adj : 0);
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} else if (NativeJump::is_jump_at(inst_loc)) {
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NativeJump* jump = nativeJump_at(inst_loc);
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return jump->jump_destination() + (intptr_t)(jump->is_pcrelative() ? adj : 0);
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} else if (NativeConditionalFarBranch::is_conditional_far_branch_at(inst_loc)) {
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NativeConditionalFarBranch* branch = NativeConditionalFarBranch_at(inst_loc);
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return branch->branch_destination();
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} else {
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orig_addr = nativeCall_at(inst_loc)->get_trampoline();
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if (orig_addr == NULL) {
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return (address) -1;
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} else {
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return ((NativeCallTrampolineStub*)orig_addr)->destination();
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}
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}
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}
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void Relocation::pd_set_call_destination(address x) {
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address inst_loc = addr();
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if (NativeFarCall::is_far_call_at(inst_loc)) {
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NativeFarCall* call = nativeFarCall_at(inst_loc);
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call->set_destination(x);
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} else if (NativeJump::is_jump_at(inst_loc)) {
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NativeJump* jump= nativeJump_at(inst_loc);
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jump->set_jump_destination(x);
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} else if (NativeConditionalFarBranch::is_conditional_far_branch_at(inst_loc)) {
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NativeConditionalFarBranch* branch = NativeConditionalFarBranch_at(inst_loc);
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branch->set_branch_destination(x);
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} else {
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NativeCall* call = nativeCall_at(inst_loc);
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call->set_destination_mt_safe(x, false);
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}
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}
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address* Relocation::pd_address_in_code() {
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ShouldNotReachHere();
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return 0;
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}
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address Relocation::pd_get_address_from_code() {
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return (address)(nativeMovConstReg_at(addr())->data());
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}
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void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
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}
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void metadata_Relocation::pd_fix_value(address x) {
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}
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