| /* |
| * Copyright 1998-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| # include "incls/_precompiled.incl" |
| # include "incls/_relocInfo_x86.cpp.incl" |
| |
| |
| void Relocation::pd_set_data_value(address x, intptr_t o) { |
| #ifdef AMD64 |
| x += o; |
| typedef Assembler::WhichOperand WhichOperand; |
| WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm64, call32 |
| assert(which == Assembler::disp32_operand || |
| which == Assembler::imm64_operand, "format unpacks ok"); |
| if (which == Assembler::imm64_operand) { |
| *pd_address_in_code() = 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); |
| *(int32_t*) disp = x - next_ip; |
| } |
| #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()); |
| #ifdef AMD64 |
| if (nj->jump_destination() == (address) -1) { |
| x = (address) -1; // retain jump to self |
| } |
| #endif // AMD64 |
| 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 imm64/imm32 |
| #ifdef AMD64 |
| assert(which == Assembler::disp32_operand || |
| which == Assembler::call32_operand || |
| which == Assembler::imm64_operand, "format unpacks ok"); |
| if (which != Assembler::imm64_operand) { |
| // The "address" in the code is a displacement can't return it as |
| // and address* since it is really a jint* |
| ShouldNotReachHere(); |
| return NULL; |
| } |
| #else |
| assert(which == Assembler::disp32_operand || which == Assembler::imm32_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 imm64/imm32 |
| assert(which == Assembler::disp32_operand || |
| which == Assembler::call32_operand || |
| which == Assembler::imm64_operand, "format unpacks ok"); |
| if (which != Assembler::imm64_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(); |
| } |
| |
| int Relocation::pd_breakpoint_size() { |
| // minimum breakpoint size, in short words |
| return NativeIllegalInstruction::instruction_size / sizeof(short); |
| } |
| |
| void Relocation::pd_swap_in_breakpoint(address x, short* instrs, int instrlen) { |
| Untested("pd_swap_in_breakpoint"); |
| if (instrs != NULL) { |
| assert(instrlen * sizeof(short) == NativeIllegalInstruction::instruction_size, "enough instrlen in reloc. data"); |
| for (int i = 0; i < instrlen; i++) { |
| instrs[i] = ((short*)x)[i]; |
| } |
| } |
| NativeIllegalInstruction::insert(x); |
| } |
| |
| |
| void Relocation::pd_swap_out_breakpoint(address x, short* instrs, int instrlen) { |
| Untested("pd_swap_out_breakpoint"); |
| assert(NativeIllegalInstruction::instruction_size == sizeof(short), "right address unit for update"); |
| NativeInstruction* ni = nativeInstruction_at(x); |
| *(short*)ni->addr_at(0) = instrs[0]; |
| } |