Mercurial > hg > truffle
annotate src/cpu/x86/vm/relocInfo_x86.cpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | dc7f315e41f7 |
| children | f95d63e2154a |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1998, 2008, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_relocInfo_x86.cpp.incl" | |
| 27 | |
| 28 | |
| 29 void Relocation::pd_set_data_value(address x, intptr_t o) { | |
| 30 #ifdef AMD64 | |
| 31 x += o; | |
| 32 typedef Assembler::WhichOperand WhichOperand; | |
| 304 | 33 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm, call32, narrow oop |
| 0 | 34 assert(which == Assembler::disp32_operand || |
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35 which == Assembler::narrow_oop_operand || |
| 304 | 36 which == Assembler::imm_operand, "format unpacks ok"); |
| 37 if (which == Assembler::imm_operand) { | |
| 0 | 38 *pd_address_in_code() = x; |
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39 } else if (which == Assembler::narrow_oop_operand) { |
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40 address disp = Assembler::locate_operand(addr(), which); |
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41 *(int32_t*) disp = oopDesc::encode_heap_oop((oop)x); |
| 0 | 42 } else { |
| 43 // Note: Use runtime_call_type relocations for call32_operand. | |
| 44 address ip = addr(); | |
| 45 address disp = Assembler::locate_operand(ip, which); | |
| 46 address next_ip = Assembler::locate_next_instruction(ip); | |
| 47 *(int32_t*) disp = x - next_ip; | |
| 48 } | |
| 49 #else | |
| 50 *pd_address_in_code() = x + o; | |
| 51 #endif // AMD64 | |
| 52 } | |
| 53 | |
| 54 | |
| 55 address Relocation::pd_call_destination(address orig_addr) { | |
| 56 intptr_t adj = 0; | |
| 57 if (orig_addr != NULL) { | |
| 58 // We just moved this call instruction from orig_addr to addr(). | |
| 59 // This means its target will appear to have grown by addr() - orig_addr. | |
| 60 adj = -( addr() - orig_addr ); | |
| 61 } | |
| 62 NativeInstruction* ni = nativeInstruction_at(addr()); | |
| 63 if (ni->is_call()) { | |
| 64 return nativeCall_at(addr())->destination() + adj; | |
| 65 } else if (ni->is_jump()) { | |
| 66 return nativeJump_at(addr())->jump_destination() + adj; | |
| 67 } else if (ni->is_cond_jump()) { | |
| 68 return nativeGeneralJump_at(addr())->jump_destination() + adj; | |
| 69 } else if (ni->is_mov_literal64()) { | |
| 70 return (address) ((NativeMovConstReg*)ni)->data(); | |
| 71 } else { | |
| 72 ShouldNotReachHere(); | |
| 73 return NULL; | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 | |
| 78 void Relocation::pd_set_call_destination(address x) { | |
| 79 NativeInstruction* ni = nativeInstruction_at(addr()); | |
| 80 if (ni->is_call()) { | |
| 81 nativeCall_at(addr())->set_destination(x); | |
| 82 } else if (ni->is_jump()) { | |
| 83 NativeJump* nj = nativeJump_at(addr()); | |
| 304 | 84 |
| 85 // Unresolved jumps are recognized by a destination of -1 | |
| 86 // However 64bit can't actually produce such an address | |
| 87 // and encodes a jump to self but jump_destination will | |
| 88 // return a -1 as the signal. We must not relocate this | |
| 89 // jmp or the ic code will not see it as unresolved. | |
| 90 | |
| 0 | 91 if (nj->jump_destination() == (address) -1) { |
| 304 | 92 x = addr(); // jump to self |
| 0 | 93 } |
| 94 nj->set_jump_destination(x); | |
| 95 } else if (ni->is_cond_jump()) { | |
| 96 // %%%% kludge this, for now, until we get a jump_destination method | |
| 97 address old_dest = nativeGeneralJump_at(addr())->jump_destination(); | |
| 98 address disp = Assembler::locate_operand(addr(), Assembler::call32_operand); | |
| 99 *(jint*)disp += (x - old_dest); | |
| 100 } else if (ni->is_mov_literal64()) { | |
| 101 ((NativeMovConstReg*)ni)->set_data((intptr_t)x); | |
| 102 } else { | |
| 103 ShouldNotReachHere(); | |
| 104 } | |
| 105 } | |
| 106 | |
| 107 | |
| 108 address* Relocation::pd_address_in_code() { | |
| 109 // All embedded Intel addresses are stored in 32-bit words. | |
| 110 // Since the addr points at the start of the instruction, | |
| 111 // we must parse the instruction a bit to find the embedded word. | |
| 112 assert(is_data(), "must be a DataRelocation"); | |
| 113 typedef Assembler::WhichOperand WhichOperand; | |
| 304 | 114 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm/imm32 |
| 0 | 115 #ifdef AMD64 |
| 116 assert(which == Assembler::disp32_operand || | |
| 117 which == Assembler::call32_operand || | |
| 304 | 118 which == Assembler::imm_operand, "format unpacks ok"); |
| 119 if (which != Assembler::imm_operand) { | |
| 0 | 120 // The "address" in the code is a displacement can't return it as |
| 121 // and address* since it is really a jint* | |
| 122 ShouldNotReachHere(); | |
| 123 return NULL; | |
| 124 } | |
| 125 #else | |
| 304 | 126 assert(which == Assembler::disp32_operand || which == Assembler::imm_operand, "format unpacks ok"); |
| 0 | 127 #endif // AMD64 |
| 128 return (address*) Assembler::locate_operand(addr(), which); | |
| 129 } | |
| 130 | |
| 131 | |
| 132 address Relocation::pd_get_address_from_code() { | |
| 133 #ifdef AMD64 | |
| 134 // All embedded Intel addresses are stored in 32-bit words. | |
| 135 // Since the addr points at the start of the instruction, | |
| 136 // we must parse the instruction a bit to find the embedded word. | |
| 137 assert(is_data(), "must be a DataRelocation"); | |
| 138 typedef Assembler::WhichOperand WhichOperand; | |
| 304 | 139 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm/imm32 |
| 0 | 140 assert(which == Assembler::disp32_operand || |
| 141 which == Assembler::call32_operand || | |
| 304 | 142 which == Assembler::imm_operand, "format unpacks ok"); |
| 143 if (which != Assembler::imm_operand) { | |
| 0 | 144 address ip = addr(); |
| 145 address disp = Assembler::locate_operand(ip, which); | |
| 146 address next_ip = Assembler::locate_next_instruction(ip); | |
| 147 address a = next_ip + *(int32_t*) disp; | |
| 148 return a; | |
| 149 } | |
| 150 #endif // AMD64 | |
| 151 return *pd_address_in_code(); | |
| 152 } | |
| 153 | |
| 154 int Relocation::pd_breakpoint_size() { | |
| 155 // minimum breakpoint size, in short words | |
| 156 return NativeIllegalInstruction::instruction_size / sizeof(short); | |
| 157 } | |
| 158 | |
| 159 void Relocation::pd_swap_in_breakpoint(address x, short* instrs, int instrlen) { | |
| 160 Untested("pd_swap_in_breakpoint"); | |
| 161 if (instrs != NULL) { | |
| 162 assert(instrlen * sizeof(short) == NativeIllegalInstruction::instruction_size, "enough instrlen in reloc. data"); | |
| 163 for (int i = 0; i < instrlen; i++) { | |
| 164 instrs[i] = ((short*)x)[i]; | |
| 165 } | |
| 166 } | |
| 167 NativeIllegalInstruction::insert(x); | |
| 168 } | |
| 169 | |
| 170 | |
| 171 void Relocation::pd_swap_out_breakpoint(address x, short* instrs, int instrlen) { | |
| 172 Untested("pd_swap_out_breakpoint"); | |
| 173 assert(NativeIllegalInstruction::instruction_size == sizeof(short), "right address unit for update"); | |
| 174 NativeInstruction* ni = nativeInstruction_at(x); | |
| 175 *(short*)ni->addr_at(0) = instrs[0]; | |
| 176 } | |
| 304 | 177 |
| 178 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
| 179 #ifdef _LP64 | |
| 180 typedef Assembler::WhichOperand WhichOperand; | |
| 181 WhichOperand which = (WhichOperand) format(); | |
| 182 // This format is imm but it is really disp32 | |
| 183 which = Assembler::disp32_operand; | |
| 184 address orig_addr = old_addr_for(addr(), src, dest); | |
| 185 NativeInstruction* oni = nativeInstruction_at(orig_addr); | |
| 186 int32_t* orig_disp = (int32_t*) Assembler::locate_operand(orig_addr, which); | |
| 187 // This poll_addr is incorrect by the size of the instruction it is irrelevant | |
| 188 intptr_t poll_addr = (intptr_t)oni + *orig_disp; | |
| 189 | |
| 190 NativeInstruction* ni = nativeInstruction_at(addr()); | |
| 191 intptr_t new_disp = poll_addr - (intptr_t) ni; | |
| 192 | |
| 193 int32_t* disp = (int32_t*) Assembler::locate_operand(addr(), which); | |
| 194 * disp = (int32_t)new_disp; | |
| 195 | |
| 196 #endif // _LP64 | |
| 197 } | |
| 198 | |
| 199 void poll_return_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
| 200 #ifdef _LP64 | |
| 201 typedef Assembler::WhichOperand WhichOperand; | |
| 202 WhichOperand which = (WhichOperand) format(); | |
| 203 // This format is imm but it is really disp32 | |
| 204 which = Assembler::disp32_operand; | |
| 205 address orig_addr = old_addr_for(addr(), src, dest); | |
| 206 NativeInstruction* oni = nativeInstruction_at(orig_addr); | |
| 207 int32_t* orig_disp = (int32_t*) Assembler::locate_operand(orig_addr, which); | |
| 208 // This poll_addr is incorrect by the size of the instruction it is irrelevant | |
| 209 intptr_t poll_addr = (intptr_t)oni + *orig_disp; | |
| 210 | |
| 211 NativeInstruction* ni = nativeInstruction_at(addr()); | |
| 212 intptr_t new_disp = poll_addr - (intptr_t) ni; | |
| 213 | |
| 214 int32_t* disp = (int32_t*) Assembler::locate_operand(addr(), which); | |
| 215 * disp = (int32_t)new_disp; | |
| 216 #endif // _LP64 | |
| 217 } |