| /* |
| * Copyright (c) 2008, 2016, Oracle and/or its affiliates. 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_arm.inline.hpp" |
| #include "code/relocInfo.hpp" |
| #include "nativeInst_arm.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "runtime/safepoint.hpp" |
| |
| void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) { |
| |
| NativeMovConstReg* ni = nativeMovConstReg_at(addr()); |
| #if defined(AARCH64) && defined(COMPILER2) |
| if (ni->is_movz()) { |
| assert(type() == relocInfo::oop_type, "!"); |
| if (verify_only) { |
| uintptr_t d = ni->data(); |
| guarantee((d >> 32) == 0, "not narrow oop"); |
| narrowOop no = d; |
| oop o = oopDesc::decode_heap_oop(no); |
| guarantee(cast_from_oop<intptr_t>(o) == (intptr_t)x, "instructions must match"); |
| } else { |
| ni->set_data((intptr_t)x); |
| } |
| return; |
| } |
| #endif |
| if (verify_only) { |
| guarantee(ni->data() == (intptr_t)(x + o), "instructions must match"); |
| } else { |
| ni->set_data((intptr_t)(x + o)); |
| } |
| } |
| |
| address Relocation::pd_call_destination(address orig_addr) { |
| address pc = addr(); |
| |
| int adj = 0; |
| if (orig_addr != NULL) { |
| // We just moved this call instruction from orig_addr to addr(). |
| // This means that, when relative, its target will appear to have grown by addr() - orig_addr. |
| adj = orig_addr - pc; |
| } |
| |
| RawNativeInstruction* ni = rawNativeInstruction_at(pc); |
| |
| #if (!defined(AARCH64)) |
| if (NOT_AARCH64(ni->is_add_lr()) AARCH64_ONLY(ni->is_adr_aligned_lr())) { |
| // On arm32, skip the optional 'add LR, PC, #offset' |
| // (Allowing the jump support code to handle fat_call) |
| pc = ni->next_raw_instruction_address(); |
| ni = nativeInstruction_at(pc); |
| } |
| #endif |
| |
| if (AARCH64_ONLY(ni->is_call()) NOT_AARCH64(ni->is_bl())) { |
| // For arm32, fat_call are handled by is_jump for the new 'ni', |
| // requiring only to support is_bl. |
| // |
| // For AARCH64, skipping a leading adr is not sufficient |
| // to reduce calls to a simple bl. |
| return rawNativeCall_at(pc)->destination(adj); |
| } |
| |
| if (ni->is_jump()) { |
| return rawNativeJump_at(pc)->jump_destination(adj); |
| } |
| ShouldNotReachHere(); |
| return NULL; |
| } |
| |
| void Relocation::pd_set_call_destination(address x) { |
| address pc = addr(); |
| NativeInstruction* ni = nativeInstruction_at(pc); |
| |
| #if (!defined(AARCH64)) |
| if (NOT_AARCH64(ni->is_add_lr()) AARCH64_ONLY(ni->is_adr_aligned_lr())) { |
| // On arm32, skip the optional 'add LR, PC, #offset' |
| // (Allowing the jump support code to handle fat_call) |
| pc = ni->next_raw_instruction_address(); |
| ni = nativeInstruction_at(pc); |
| } |
| #endif |
| |
| if (AARCH64_ONLY(ni->is_call()) NOT_AARCH64(ni->is_bl())) { |
| // For arm32, fat_call are handled by is_jump for the new 'ni', |
| // requiring only to support is_bl. |
| // |
| // For AARCH64, skipping a leading adr is not sufficient |
| // to reduce calls to a simple bl. |
| rawNativeCall_at(pc)->set_destination(x); |
| return; |
| } |
| |
| if (ni->is_jump()) { // raw jump |
| rawNativeJump_at(pc)->set_jump_destination(x); |
| return; |
| } |
| ShouldNotReachHere(); |
| } |
| |
| |
| address* Relocation::pd_address_in_code() { |
| return (address*)addr(); |
| } |
| |
| address Relocation::pd_get_address_from_code() { |
| return *pd_address_in_code(); |
| } |
| |
| void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { |
| } |
| |
| void metadata_Relocation::pd_fix_value(address x) { |
| assert(! addr_in_const(), "Do not use"); |
| #ifdef AARCH64 |
| #ifdef COMPILER2 |
| NativeMovConstReg* ni = nativeMovConstReg_at(addr()); |
| if (ni->is_mov_slow()) { |
| return; |
| } |
| #endif |
| set_value(x); |
| #else |
| if (!VM_Version::supports_movw()) { |
| set_value(x); |
| #ifdef ASSERT |
| } else { |
| // the movw/movt data should be correct |
| NativeMovConstReg* ni = nativeMovConstReg_at(addr()); |
| assert(ni->is_movw(), "not a movw"); |
| // The following assert should be correct but the shared code |
| // currently 'fixes' the metadata instructions before the |
| // metadata_table is copied in the new method (see |
| // JDK-8042845). This means that 'x' (which comes from the table) |
| // does not match the value inlined in the code (which is |
| // correct). Failure can be temporarily ignored since the code is |
| // correct and the table is copied shortly afterward. |
| // |
| // assert(ni->data() == (int)x, "metadata relocation mismatch"); |
| #endif |
| } |
| #endif // !AARCH64 |
| } |