Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| 2 | // All Rights Reserved. |
| 3 | // |
| 4 | // Redistribution and use in source and binary forms, with or without |
| 5 | // modification, are permitted provided that the following conditions are |
| 6 | // met: |
| 7 | // |
| 8 | // - Redistributions of source code must retain the above copyright notice, |
| 9 | // this list of conditions and the following disclaimer. |
| 10 | // |
| 11 | // - Redistribution in binary form must reproduce the above copyright |
| 12 | // notice, this list of conditions and the following disclaimer in the |
| 13 | // documentation and/or other materials provided with the distribution. |
| 14 | // |
| 15 | // - Neither the name of Sun Microsystems or the names of contributors may |
| 16 | // be used to endorse or promote products derived from this software without |
| 17 | // specific prior written permission. |
| 18 | // |
| 19 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 20 | // IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 21 | // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 23 | // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 24 | // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 25 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 26 | // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 27 | // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 28 | // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 29 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | |
| 31 | // The original source code covered by the above license above has been |
| 32 | // modified significantly by Google Inc. |
| 33 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| 34 | |
| 35 | // A light-weight IA32 Assembler. |
| 36 | |
| 37 | #ifndef V8_IA32_ASSEMBLER_IA32_INL_H_ |
| 38 | #define V8_IA32_ASSEMBLER_IA32_INL_H_ |
| 39 | |
| 40 | #include "cpu.h" |
| 41 | |
| 42 | namespace v8 { |
| 43 | namespace internal { |
| 44 | |
| 45 | Condition NegateCondition(Condition cc) { |
| 46 | return static_cast<Condition>(cc ^ 1); |
| 47 | } |
| 48 | |
| 49 | |
| 50 | // The modes possibly affected by apply must be in kApplyMask. |
| 51 | void RelocInfo::apply(intptr_t delta) { |
| 52 | if (rmode_ == RUNTIME_ENTRY || IsCodeTarget(rmode_)) { |
| 53 | int32_t* p = reinterpret_cast<int32_t*>(pc_); |
| 54 | *p -= delta; // relocate entry |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 55 | } else if (rmode_ == JS_RETURN && IsPatchedReturnSequence()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 56 | // Special handling of js_return when a break point is set (call |
| 57 | // instruction has been inserted). |
| 58 | int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1); |
| 59 | *p -= delta; // relocate entry |
| 60 | } else if (IsInternalReference(rmode_)) { |
| 61 | // absolute code pointer inside code object moves with the code object. |
| 62 | int32_t* p = reinterpret_cast<int32_t*>(pc_); |
| 63 | *p += delta; // relocate entry |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | |
| 68 | Address RelocInfo::target_address() { |
| 69 | ASSERT(IsCodeTarget(rmode_) || rmode_ == RUNTIME_ENTRY); |
| 70 | return Assembler::target_address_at(pc_); |
| 71 | } |
| 72 | |
| 73 | |
| 74 | Address RelocInfo::target_address_address() { |
| 75 | ASSERT(IsCodeTarget(rmode_) || rmode_ == RUNTIME_ENTRY); |
| 76 | return reinterpret_cast<Address>(pc_); |
| 77 | } |
| 78 | |
| 79 | |
| 80 | void RelocInfo::set_target_address(Address target) { |
| 81 | ASSERT(IsCodeTarget(rmode_) || rmode_ == RUNTIME_ENTRY); |
| 82 | Assembler::set_target_address_at(pc_, target); |
| 83 | } |
| 84 | |
| 85 | |
| 86 | Object* RelocInfo::target_object() { |
| 87 | ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 88 | return Memory::Object_at(pc_); |
| 89 | } |
| 90 | |
| 91 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 92 | Handle<Object> RelocInfo::target_object_handle(Assembler* origin) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 93 | ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| 94 | return Memory::Object_Handle_at(pc_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | |
| 98 | Object** RelocInfo::target_object_address() { |
| 99 | ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 100 | return &Memory::Object_at(pc_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 101 | } |
| 102 | |
| 103 | |
| 104 | void RelocInfo::set_target_object(Object* target) { |
| 105 | ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 106 | Memory::Object_at(pc_) = target; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | |
| 110 | Address* RelocInfo::target_reference_address() { |
| 111 | ASSERT(rmode_ == RelocInfo::EXTERNAL_REFERENCE); |
| 112 | return reinterpret_cast<Address*>(pc_); |
| 113 | } |
| 114 | |
| 115 | |
| 116 | Address RelocInfo::call_address() { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 117 | ASSERT(IsPatchedReturnSequence()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 118 | return Assembler::target_address_at(pc_ + 1); |
| 119 | } |
| 120 | |
| 121 | |
| 122 | void RelocInfo::set_call_address(Address target) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 123 | ASSERT(IsPatchedReturnSequence()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 124 | Assembler::set_target_address_at(pc_ + 1, target); |
| 125 | } |
| 126 | |
| 127 | |
| 128 | Object* RelocInfo::call_object() { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 129 | ASSERT(IsPatchedReturnSequence()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 130 | return *call_object_address(); |
| 131 | } |
| 132 | |
| 133 | |
| 134 | Object** RelocInfo::call_object_address() { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 135 | ASSERT(IsPatchedReturnSequence()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 136 | return reinterpret_cast<Object**>(pc_ + 1); |
| 137 | } |
| 138 | |
| 139 | |
| 140 | void RelocInfo::set_call_object(Object* target) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 141 | ASSERT(IsPatchedReturnSequence()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 142 | *call_object_address() = target; |
| 143 | } |
| 144 | |
| 145 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 146 | bool RelocInfo::IsPatchedReturnSequence() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 147 | return *pc_ == 0xE8; |
| 148 | } |
| 149 | |
| 150 | |
| 151 | Immediate::Immediate(int x) { |
| 152 | x_ = x; |
| 153 | rmode_ = RelocInfo::NONE; |
| 154 | } |
| 155 | |
| 156 | |
| 157 | Immediate::Immediate(const ExternalReference& ext) { |
| 158 | x_ = reinterpret_cast<int32_t>(ext.address()); |
| 159 | rmode_ = RelocInfo::EXTERNAL_REFERENCE; |
| 160 | } |
| 161 | |
| 162 | Immediate::Immediate(const char* s) { |
| 163 | x_ = reinterpret_cast<int32_t>(s); |
| 164 | rmode_ = RelocInfo::EMBEDDED_STRING; |
| 165 | } |
| 166 | |
| 167 | |
| 168 | Immediate::Immediate(Label* internal_offset) { |
| 169 | x_ = reinterpret_cast<int32_t>(internal_offset); |
| 170 | rmode_ = RelocInfo::INTERNAL_REFERENCE; |
| 171 | } |
| 172 | |
| 173 | |
| 174 | Immediate::Immediate(Handle<Object> handle) { |
| 175 | // Verify all Objects referred by code are NOT in new space. |
| 176 | Object* obj = *handle; |
| 177 | ASSERT(!Heap::InNewSpace(obj)); |
| 178 | if (obj->IsHeapObject()) { |
| 179 | x_ = reinterpret_cast<intptr_t>(handle.location()); |
| 180 | rmode_ = RelocInfo::EMBEDDED_OBJECT; |
| 181 | } else { |
| 182 | // no relocation needed |
| 183 | x_ = reinterpret_cast<intptr_t>(obj); |
| 184 | rmode_ = RelocInfo::NONE; |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | |
| 189 | Immediate::Immediate(Smi* value) { |
| 190 | x_ = reinterpret_cast<intptr_t>(value); |
| 191 | rmode_ = RelocInfo::NONE; |
| 192 | } |
| 193 | |
| 194 | |
| 195 | void Assembler::emit(uint32_t x) { |
| 196 | *reinterpret_cast<uint32_t*>(pc_) = x; |
| 197 | pc_ += sizeof(uint32_t); |
| 198 | } |
| 199 | |
| 200 | |
| 201 | void Assembler::emit(Handle<Object> handle) { |
| 202 | // Verify all Objects referred by code are NOT in new space. |
| 203 | Object* obj = *handle; |
| 204 | ASSERT(!Heap::InNewSpace(obj)); |
| 205 | if (obj->IsHeapObject()) { |
| 206 | emit(reinterpret_cast<intptr_t>(handle.location()), |
| 207 | RelocInfo::EMBEDDED_OBJECT); |
| 208 | } else { |
| 209 | // no relocation needed |
| 210 | emit(reinterpret_cast<intptr_t>(obj)); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | |
| 215 | void Assembler::emit(uint32_t x, RelocInfo::Mode rmode) { |
| 216 | if (rmode != RelocInfo::NONE) RecordRelocInfo(rmode); |
| 217 | emit(x); |
| 218 | } |
| 219 | |
| 220 | |
| 221 | void Assembler::emit(const Immediate& x) { |
| 222 | if (x.rmode_ == RelocInfo::INTERNAL_REFERENCE) { |
| 223 | Label* label = reinterpret_cast<Label*>(x.x_); |
| 224 | emit_code_relative_offset(label); |
| 225 | return; |
| 226 | } |
| 227 | if (x.rmode_ != RelocInfo::NONE) RecordRelocInfo(x.rmode_); |
| 228 | emit(x.x_); |
| 229 | } |
| 230 | |
| 231 | |
| 232 | void Assembler::emit_code_relative_offset(Label* label) { |
| 233 | if (label->is_bound()) { |
| 234 | int32_t pos; |
| 235 | pos = label->pos() + Code::kHeaderSize - kHeapObjectTag; |
| 236 | emit(pos); |
| 237 | } else { |
| 238 | emit_disp(label, Displacement::CODE_RELATIVE); |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | |
| 243 | void Assembler::emit_w(const Immediate& x) { |
| 244 | ASSERT(x.rmode_ == RelocInfo::NONE); |
| 245 | uint16_t value = static_cast<uint16_t>(x.x_); |
| 246 | reinterpret_cast<uint16_t*>(pc_)[0] = value; |
| 247 | pc_ += sizeof(uint16_t); |
| 248 | } |
| 249 | |
| 250 | |
| 251 | Address Assembler::target_address_at(Address pc) { |
| 252 | return pc + sizeof(int32_t) + *reinterpret_cast<int32_t*>(pc); |
| 253 | } |
| 254 | |
| 255 | |
| 256 | void Assembler::set_target_address_at(Address pc, Address target) { |
| 257 | int32_t* p = reinterpret_cast<int32_t*>(pc); |
| 258 | *p = target - (pc + sizeof(int32_t)); |
| 259 | CPU::FlushICache(p, sizeof(int32_t)); |
| 260 | } |
| 261 | |
| 262 | |
| 263 | Displacement Assembler::disp_at(Label* L) { |
| 264 | return Displacement(long_at(L->pos())); |
| 265 | } |
| 266 | |
| 267 | |
| 268 | void Assembler::disp_at_put(Label* L, Displacement disp) { |
| 269 | long_at_put(L->pos(), disp.data()); |
| 270 | } |
| 271 | |
| 272 | |
| 273 | void Assembler::emit_disp(Label* L, Displacement::Type type) { |
| 274 | Displacement disp(L, type); |
| 275 | L->link_to(pc_offset()); |
| 276 | emit(static_cast<int>(disp.data())); |
| 277 | } |
| 278 | |
| 279 | |
| 280 | void Operand::set_modrm(int mod, Register rm) { |
| 281 | ASSERT((mod & -4) == 0); |
| 282 | buf_[0] = mod << 6 | rm.code(); |
| 283 | len_ = 1; |
| 284 | } |
| 285 | |
| 286 | |
| 287 | void Operand::set_sib(ScaleFactor scale, Register index, Register base) { |
| 288 | ASSERT(len_ == 1); |
| 289 | ASSERT((scale & -4) == 0); |
| 290 | // Use SIB with no index register only for base esp. |
| 291 | ASSERT(!index.is(esp) || base.is(esp)); |
| 292 | buf_[1] = scale << 6 | index.code() << 3 | base.code(); |
| 293 | len_ = 2; |
| 294 | } |
| 295 | |
| 296 | |
| 297 | void Operand::set_disp8(int8_t disp) { |
| 298 | ASSERT(len_ == 1 || len_ == 2); |
| 299 | *reinterpret_cast<int8_t*>(&buf_[len_++]) = disp; |
| 300 | } |
| 301 | |
| 302 | |
| 303 | void Operand::set_dispr(int32_t disp, RelocInfo::Mode rmode) { |
| 304 | ASSERT(len_ == 1 || len_ == 2); |
| 305 | int32_t* p = reinterpret_cast<int32_t*>(&buf_[len_]); |
| 306 | *p = disp; |
| 307 | len_ += sizeof(int32_t); |
| 308 | rmode_ = rmode; |
| 309 | } |
| 310 | |
| 311 | Operand::Operand(Register reg) { |
| 312 | // reg |
| 313 | set_modrm(3, reg); |
| 314 | } |
| 315 | |
| 316 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame^] | 317 | Operand::Operand(XMMRegister xmm_reg) { |
| 318 | Register reg = { xmm_reg.code() }; |
| 319 | set_modrm(3, reg); |
| 320 | } |
| 321 | |
| 322 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 323 | Operand::Operand(int32_t disp, RelocInfo::Mode rmode) { |
| 324 | // [disp/r] |
| 325 | set_modrm(0, ebp); |
| 326 | set_dispr(disp, rmode); |
| 327 | } |
| 328 | |
| 329 | } } // namespace v8::internal |
| 330 | |
| 331 | #endif // V8_IA32_ASSEMBLER_IA32_INL_H_ |