| /* |
| * Copyright (c) 1998, 2013, 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/macroAssembler.hpp" |
| #include "code/relocInfo.hpp" |
| #include "nativeInst_x86.hpp" |
| #include "oops/klass.inline.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "runtime/safepoint.hpp" |
| |
| |
| void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) { |
| #ifdef AMD64 |
| x += o; |
| typedef Assembler::WhichOperand WhichOperand; |
| WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm, call32, narrow oop |
| assert(which == Assembler::disp32_operand || |
| which == Assembler::narrow_oop_operand || |
| which == Assembler::imm_operand, "format unpacks ok"); |
| if (which == Assembler::imm_operand) { |
| if (verify_only) { |
| assert(*pd_address_in_code() == x, "instructions must match"); |
| } else { |
| *pd_address_in_code() = x; |
| } |
| } else if (which == Assembler::narrow_oop_operand) { |
| address disp = Assembler::locate_operand(addr(), which); |
| // both compressed oops and compressed classes look the same |
| if (Universe::heap()->is_in_reserved((oop)x)) { |
| if (verify_only) { |
| assert(*(uint32_t*) disp == oopDesc::encode_heap_oop((oop)x), "instructions must match"); |
| } else { |
| *(int32_t*) disp = oopDesc::encode_heap_oop((oop)x); |
| } |
| } else { |
| if (verify_only) { |
| assert(*(uint32_t*) disp == Klass::encode_klass((Klass*)x), "instructions must match"); |
| } else { |
| *(int32_t*) disp = Klass::encode_klass((Klass*)x); |
| } |
| } |
| } else { |
| // Note: Use runtime_call_type relocations for call32_operand. |
| address ip = addr(); |
| address disp = Assembler::locate_operand(ip, which); |
| address next_ip = Assembler::locate_next_instruction(ip); |
| if (verify_only) { |
| assert(*(int32_t*) disp == (x - next_ip), "instructions must match"); |
| } else { |
| *(int32_t*) disp = x - next_ip; |
| } |
| } |
| #else |
| if (verify_only) { |
| assert(*pd_address_in_code() == (x + o), "instructions must match"); |
| } else { |
| *pd_address_in_code() = x + o; |
| } |
| #endif // AMD64 |
| } |
| |
| |
| address Relocation::pd_call_destination(address orig_addr) { |
| intptr_t adj = 0; |
| 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 = -( addr() - orig_addr ); |
| } |
| NativeInstruction* ni = nativeInstruction_at(addr()); |
| if (ni->is_call()) { |
| return nativeCall_at(addr())->destination() + adj; |
| } else if (ni->is_jump()) { |
| return nativeJump_at(addr())->jump_destination() + adj; |
| } else if (ni->is_cond_jump()) { |
| return nativeGeneralJump_at(addr())->jump_destination() + adj; |
| } else if (ni->is_mov_literal64()) { |
| return (address) ((NativeMovConstReg*)ni)->data(); |
| } else { |
| ShouldNotReachHere(); |
| return NULL; |
| } |
| } |
| |
| |
| void Relocation::pd_set_call_destination(address x) { |
| NativeInstruction* ni = nativeInstruction_at(addr()); |
| if (ni->is_call()) { |
| nativeCall_at(addr())->set_destination(x); |
| } else if (ni->is_jump()) { |
| NativeJump* nj = nativeJump_at(addr()); |
| |
| // Unresolved jumps are recognized by a destination of -1 |
| // However 64bit can't actually produce such an address |
| // and encodes a jump to self but jump_destination will |
| // return a -1 as the signal. We must not relocate this |
| // jmp or the ic code will not see it as unresolved. |
| |
| if (nj->jump_destination() == (address) -1) { |
| x = addr(); // jump to self |
| } |
| nj->set_jump_destination(x); |
| } else if (ni->is_cond_jump()) { |
| // %%%% kludge this, for now, until we get a jump_destination method |
| address old_dest = nativeGeneralJump_at(addr())->jump_destination(); |
| address disp = Assembler::locate_operand(addr(), Assembler::call32_operand); |
| *(jint*)disp += (x - old_dest); |
| } else if (ni->is_mov_literal64()) { |
| ((NativeMovConstReg*)ni)->set_data((intptr_t)x); |
| } else { |
| ShouldNotReachHere(); |
| } |
| } |
| |
| |
| address* Relocation::pd_address_in_code() { |
| // All embedded Intel addresses are stored in 32-bit words. |
| // Since the addr points at the start of the instruction, |
| // we must parse the instruction a bit to find the embedded word. |
| assert(is_data(), "must be a DataRelocation"); |
| typedef Assembler::WhichOperand WhichOperand; |
| WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm/imm32 |
| #ifdef AMD64 |
| assert(which == Assembler::disp32_operand || |
| which == Assembler::call32_operand || |
| which == Assembler::imm_operand, "format unpacks ok"); |
| // The "address" in the code is a displacement can't return it as |
| // and address* since it is really a jint* |
| guarantee(which == Assembler::imm_operand, "must be immediate operand"); |
| #else |
| assert(which == Assembler::disp32_operand || which == Assembler::imm_operand, "format unpacks ok"); |
| #endif // AMD64 |
| return (address*) Assembler::locate_operand(addr(), which); |
| } |
| |
| |
| address Relocation::pd_get_address_from_code() { |
| #ifdef AMD64 |
| // All embedded Intel addresses are stored in 32-bit words. |
| // Since the addr points at the start of the instruction, |
| // we must parse the instruction a bit to find the embedded word. |
| assert(is_data(), "must be a DataRelocation"); |
| typedef Assembler::WhichOperand WhichOperand; |
| WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm/imm32 |
| assert(which == Assembler::disp32_operand || |
| which == Assembler::call32_operand || |
| which == Assembler::imm_operand, "format unpacks ok"); |
| if (which != Assembler::imm_operand) { |
| address ip = addr(); |
| address disp = Assembler::locate_operand(ip, which); |
| address next_ip = Assembler::locate_next_instruction(ip); |
| address a = next_ip + *(int32_t*) disp; |
| return a; |
| } |
| #endif // AMD64 |
| return *pd_address_in_code(); |
| } |
| |
| void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { |
| #ifdef _LP64 |
| typedef Assembler::WhichOperand WhichOperand; |
| WhichOperand which = (WhichOperand) format(); |
| #if !INCLUDE_JVMCI |
| assert((which == Assembler::disp32_operand) == !Assembler::is_polling_page_far(), "format not set correctly"); |
| #endif |
| if (which == Assembler::disp32_operand) { |
| address orig_addr = old_addr_for(addr(), src, dest); |
| NativeInstruction* oni = nativeInstruction_at(orig_addr); |
| int32_t* orig_disp = (int32_t*) Assembler::locate_operand(orig_addr, which); |
| // This poll_addr is incorrect by the size of the instruction it is irrelevant |
| intptr_t poll_addr = (intptr_t)oni + *orig_disp; |
| NativeInstruction* ni = nativeInstruction_at(addr()); |
| intptr_t new_disp = poll_addr - (intptr_t) ni; |
| |
| int32_t* disp = (int32_t*) Assembler::locate_operand(addr(), which); |
| * disp = (int32_t)new_disp; |
| } |
| #endif // _LP64 |
| } |
| |
| void metadata_Relocation::pd_fix_value(address x) { |
| } |