181 lines
6.3 KiB
C++
181 lines
6.3 KiB
C++
/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2016 SAP SE. 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_s390.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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// we don't support splitting of relocations, so o must be zero:
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assert(o == 0, "tried to split relocations");
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if (!verify_only) {
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switch (format()) {
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case relocInfo::uncompressed_format:
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nativeMovConstReg_at(addr())->set_data_plain(((intptr_t)x) + o, code());
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break;
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case relocInfo::compressed_format:
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if (type() == relocInfo::metadata_type)
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nativeMovConstReg_at(addr())->set_narrow_klass(((intptr_t)x) + o);
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else if (type() == relocInfo::oop_type)
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nativeMovConstReg_at(addr())->set_narrow_oop(((intptr_t)x) + o);
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else
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guarantee(false, "bad relocInfo type for relocInfo::narrow_oop_format");
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break;
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case relocInfo::pcrel_addr_format: // patch target location
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nativeMovConstReg_at(addr())->set_pcrel_addr(((intptr_t)x) + o, code());
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break;
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case relocInfo::pcrel_data_format: // patch data at target location
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nativeMovConstReg_at(addr())->set_pcrel_data(((intptr_t)x) + o, code());
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break;
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default:
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assert(false, "not a valid relocInfo format");
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break;
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}
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} else {
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// TODO: Reading of narrow oops out of code stream is not implemented
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// (see nativeMovConstReg::data()). Implement this if you want to verify.
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// assert(x == (address) nativeMovConstReg_at(addr())->data(), "Instructions must match");
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switch (format()) {
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case relocInfo::uncompressed_format:
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break;
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case relocInfo::compressed_format:
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break;
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case relocInfo::pcrel_addr_format:
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break;
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case relocInfo::pcrel_data_format:
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break;
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default:
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assert(false, "not a valid relocInfo format");
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break;
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}
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}
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}
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address Relocation::pd_call_destination(address orig_addr) {
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address inst_addr = addr();
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if (NativeFarCall::is_far_call_at(inst_addr)) {
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if (!ShortenBranches) {
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if (MacroAssembler::is_call_far_pcrelative(inst_addr)) {
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address a1 = MacroAssembler::get_target_addr_pcrel(orig_addr+MacroAssembler::nop_size());
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#ifdef ASSERT
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address a2 = MacroAssembler::get_target_addr_pcrel(inst_addr+MacroAssembler::nop_size());
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address a3 = nativeFarCall_at(orig_addr)->destination();
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address a4 = nativeFarCall_at(inst_addr)->destination();
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if ((a1 != a3) || (a2 != a4)) {
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unsigned int range = 128;
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Assembler::dump_code_range(tty, inst_addr, range, "pc-relative call w/o ShortenBranches?");
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Assembler::dump_code_range(tty, orig_addr, range, "pc-relative call w/o ShortenBranches?");
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assert(false, "pc-relative call w/o ShortenBranches?");
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}
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#endif
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return a1;
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}
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return (address)(-1);
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}
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NativeFarCall* call;
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if (orig_addr == NULL) {
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call = nativeFarCall_at(inst_addr);
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} else {
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// must access location (in CP) where destination is stored in unmoved code, because load from CP is pc-relative
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call = nativeFarCall_at(orig_addr);
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}
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return call->destination();
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}
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if (NativeCall::is_call_at(inst_addr)) {
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NativeCall* call = nativeCall_at(inst_addr);
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if (call->is_pcrelative()) {
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intptr_t off = inst_addr - orig_addr;
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return (address) (call->destination()-off);
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}
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}
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return (address) nativeMovConstReg_at(inst_addr)->data();
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}
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void Relocation::pd_set_call_destination(address x) {
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address inst_addr = addr();
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if (NativeFarCall::is_far_call_at(inst_addr)) {
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if (!ShortenBranches) {
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if (MacroAssembler::is_call_far_pcrelative(inst_addr)) {
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address a1 = MacroAssembler::get_target_addr_pcrel(inst_addr+MacroAssembler::nop_size());
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#ifdef ASSERT
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address a3 = nativeFarCall_at(inst_addr)->destination();
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if (a1 != a3) {
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unsigned int range = 128;
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Assembler::dump_code_range(tty, inst_addr, range, "pc-relative call w/o ShortenBranches?");
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assert(false, "pc-relative call w/o ShortenBranches?");
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}
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#endif
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nativeFarCall_at(inst_addr)->set_destination(x, 0);
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return;
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}
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assert(x == (address)-1, "consistency check");
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return;
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}
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int toc_offset = -1;
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if (type() == relocInfo::runtime_call_w_cp_type) {
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toc_offset = ((runtime_call_w_cp_Relocation *)this)->get_constant_pool_offset();
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}
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if (toc_offset>=0) {
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NativeFarCall* call = nativeFarCall_at(inst_addr);
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call->set_destination(x, toc_offset);
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return;
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}
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}
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if (NativeCall::is_call_at(inst_addr)) {
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NativeCall* call = nativeCall_at(inst_addr);
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if (call->is_pcrelative()) {
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call->set_destination_mt_safe(x);
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return;
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}
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}
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// constant is absolute, must use x
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nativeMovConstReg_at(inst_addr)->set_data(((intptr_t)x));
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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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