1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/x86/vm/relocInfo_x86.cpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,167 @@
1.4 +/*
1.5 + * Copyright 1998-2005 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +# include "incls/_precompiled.incl"
1.29 +# include "incls/_relocInfo_x86.cpp.incl"
1.30 +
1.31 +
1.32 +void Relocation::pd_set_data_value(address x, intptr_t o) {
1.33 +#ifdef AMD64
1.34 + x += o;
1.35 + typedef Assembler::WhichOperand WhichOperand;
1.36 + WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm64, call32
1.37 + assert(which == Assembler::disp32_operand ||
1.38 + which == Assembler::imm64_operand, "format unpacks ok");
1.39 + if (which == Assembler::imm64_operand) {
1.40 + *pd_address_in_code() = x;
1.41 + } else {
1.42 + // Note: Use runtime_call_type relocations for call32_operand.
1.43 + address ip = addr();
1.44 + address disp = Assembler::locate_operand(ip, which);
1.45 + address next_ip = Assembler::locate_next_instruction(ip);
1.46 + *(int32_t*) disp = x - next_ip;
1.47 + }
1.48 +#else
1.49 + *pd_address_in_code() = x + o;
1.50 +#endif // AMD64
1.51 +}
1.52 +
1.53 +
1.54 +address Relocation::pd_call_destination(address orig_addr) {
1.55 + intptr_t adj = 0;
1.56 + if (orig_addr != NULL) {
1.57 + // We just moved this call instruction from orig_addr to addr().
1.58 + // This means its target will appear to have grown by addr() - orig_addr.
1.59 + adj = -( addr() - orig_addr );
1.60 + }
1.61 + NativeInstruction* ni = nativeInstruction_at(addr());
1.62 + if (ni->is_call()) {
1.63 + return nativeCall_at(addr())->destination() + adj;
1.64 + } else if (ni->is_jump()) {
1.65 + return nativeJump_at(addr())->jump_destination() + adj;
1.66 + } else if (ni->is_cond_jump()) {
1.67 + return nativeGeneralJump_at(addr())->jump_destination() + adj;
1.68 + } else if (ni->is_mov_literal64()) {
1.69 + return (address) ((NativeMovConstReg*)ni)->data();
1.70 + } else {
1.71 + ShouldNotReachHere();
1.72 + return NULL;
1.73 + }
1.74 +}
1.75 +
1.76 +
1.77 +void Relocation::pd_set_call_destination(address x) {
1.78 + NativeInstruction* ni = nativeInstruction_at(addr());
1.79 + if (ni->is_call()) {
1.80 + nativeCall_at(addr())->set_destination(x);
1.81 + } else if (ni->is_jump()) {
1.82 + NativeJump* nj = nativeJump_at(addr());
1.83 +#ifdef AMD64
1.84 + if (nj->jump_destination() == (address) -1) {
1.85 + x = (address) -1; // retain jump to self
1.86 + }
1.87 +#endif // AMD64
1.88 + nj->set_jump_destination(x);
1.89 + } else if (ni->is_cond_jump()) {
1.90 + // %%%% kludge this, for now, until we get a jump_destination method
1.91 + address old_dest = nativeGeneralJump_at(addr())->jump_destination();
1.92 + address disp = Assembler::locate_operand(addr(), Assembler::call32_operand);
1.93 + *(jint*)disp += (x - old_dest);
1.94 + } else if (ni->is_mov_literal64()) {
1.95 + ((NativeMovConstReg*)ni)->set_data((intptr_t)x);
1.96 + } else {
1.97 + ShouldNotReachHere();
1.98 + }
1.99 +}
1.100 +
1.101 +
1.102 +address* Relocation::pd_address_in_code() {
1.103 + // All embedded Intel addresses are stored in 32-bit words.
1.104 + // Since the addr points at the start of the instruction,
1.105 + // we must parse the instruction a bit to find the embedded word.
1.106 + assert(is_data(), "must be a DataRelocation");
1.107 + typedef Assembler::WhichOperand WhichOperand;
1.108 + WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm64/imm32
1.109 +#ifdef AMD64
1.110 + assert(which == Assembler::disp32_operand ||
1.111 + which == Assembler::call32_operand ||
1.112 + which == Assembler::imm64_operand, "format unpacks ok");
1.113 + if (which != Assembler::imm64_operand) {
1.114 + // The "address" in the code is a displacement can't return it as
1.115 + // and address* since it is really a jint*
1.116 + ShouldNotReachHere();
1.117 + return NULL;
1.118 + }
1.119 +#else
1.120 + assert(which == Assembler::disp32_operand || which == Assembler::imm32_operand, "format unpacks ok");
1.121 +#endif // AMD64
1.122 + return (address*) Assembler::locate_operand(addr(), which);
1.123 +}
1.124 +
1.125 +
1.126 +address Relocation::pd_get_address_from_code() {
1.127 +#ifdef AMD64
1.128 + // All embedded Intel addresses are stored in 32-bit words.
1.129 + // Since the addr points at the start of the instruction,
1.130 + // we must parse the instruction a bit to find the embedded word.
1.131 + assert(is_data(), "must be a DataRelocation");
1.132 + typedef Assembler::WhichOperand WhichOperand;
1.133 + WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm64/imm32
1.134 + assert(which == Assembler::disp32_operand ||
1.135 + which == Assembler::call32_operand ||
1.136 + which == Assembler::imm64_operand, "format unpacks ok");
1.137 + if (which != Assembler::imm64_operand) {
1.138 + address ip = addr();
1.139 + address disp = Assembler::locate_operand(ip, which);
1.140 + address next_ip = Assembler::locate_next_instruction(ip);
1.141 + address a = next_ip + *(int32_t*) disp;
1.142 + return a;
1.143 + }
1.144 +#endif // AMD64
1.145 + return *pd_address_in_code();
1.146 +}
1.147 +
1.148 +int Relocation::pd_breakpoint_size() {
1.149 + // minimum breakpoint size, in short words
1.150 + return NativeIllegalInstruction::instruction_size / sizeof(short);
1.151 +}
1.152 +
1.153 +void Relocation::pd_swap_in_breakpoint(address x, short* instrs, int instrlen) {
1.154 + Untested("pd_swap_in_breakpoint");
1.155 + if (instrs != NULL) {
1.156 + assert(instrlen * sizeof(short) == NativeIllegalInstruction::instruction_size, "enough instrlen in reloc. data");
1.157 + for (int i = 0; i < instrlen; i++) {
1.158 + instrs[i] = ((short*)x)[i];
1.159 + }
1.160 + }
1.161 + NativeIllegalInstruction::insert(x);
1.162 +}
1.163 +
1.164 +
1.165 +void Relocation::pd_swap_out_breakpoint(address x, short* instrs, int instrlen) {
1.166 + Untested("pd_swap_out_breakpoint");
1.167 + assert(NativeIllegalInstruction::instruction_size == sizeof(short), "right address unit for update");
1.168 + NativeInstruction* ni = nativeInstruction_at(x);
1.169 + *(short*)ni->addr_at(0) = instrs[0];
1.170 +}
