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1 // Copyright (c) 1994-2006 Sun Microsystems Inc. | 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. |
2 // All Rights Reserved. | 2 // All Rights Reserved. |
3 // | 3 // |
4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
5 // modification, are permitted provided that the following conditions | 5 // modification, are permitted provided that the following conditions |
6 // are met: | 6 // are met: |
7 // | 7 // |
8 // - Redistributions of source code must retain the above copyright notice, | 8 // - Redistributions of source code must retain the above copyright notice, |
9 // this list of conditions and the following disclaimer. | 9 // this list of conditions and the following disclaimer. |
10 // | 10 // |
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262 } | 262 } |
263 | 263 |
264 | 264 |
265 Object** RelocInfo::call_object_address() { | 265 Object** RelocInfo::call_object_address() { |
266 ASSERT((IsJSReturn(rmode()) && IsPatchedReturnSequence()) || | 266 ASSERT((IsJSReturn(rmode()) && IsPatchedReturnSequence()) || |
267 (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence())); | 267 (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence())); |
268 return reinterpret_cast<Object**>(pc_ + 2 * Assembler::kInstrSize); | 268 return reinterpret_cast<Object**>(pc_ + 2 * Assembler::kInstrSize); |
269 } | 269 } |
270 | 270 |
271 | 271 |
| 272 void RelocInfo::WipeOut() { |
| 273 ASSERT(IsEmbeddedObject(rmode_) || |
| 274 IsCodeTarget(rmode_) || |
| 275 IsRuntimeEntry(rmode_) || |
| 276 IsExternalReference(rmode_)); |
| 277 Assembler::set_target_pointer_at(pc_, NULL); |
| 278 } |
| 279 |
| 280 |
272 bool RelocInfo::IsPatchedReturnSequence() { | 281 bool RelocInfo::IsPatchedReturnSequence() { |
273 Instr current_instr = Assembler::instr_at(pc_); | 282 Instr current_instr = Assembler::instr_at(pc_); |
274 Instr next_instr = Assembler::instr_at(pc_ + Assembler::kInstrSize); | 283 Instr next_instr = Assembler::instr_at(pc_ + Assembler::kInstrSize); |
275 // A patched return sequence is: | 284 // A patched return sequence is: |
276 // ldr ip, [pc, #0] | 285 // ldr ip, [pc, #0] |
277 // blx ip | 286 // blx ip |
278 return ((current_instr & kLdrPCMask) == kLdrPCPattern) | 287 return ((current_instr & kLdrPCMask) == kLdrPCPattern) |
279 && ((next_instr & kBlxRegMask) == kBlxRegPattern); | 288 && ((next_instr & kBlxRegMask) == kBlxRegPattern); |
280 } | 289 } |
281 | 290 |
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523 | 532 |
524 | 533 |
525 void Assembler::set_target_address_at(Address pc, Address target) { | 534 void Assembler::set_target_address_at(Address pc, Address target) { |
526 set_target_pointer_at(pc, target); | 535 set_target_pointer_at(pc, target); |
527 } | 536 } |
528 | 537 |
529 | 538 |
530 } } // namespace v8::internal | 539 } } // namespace v8::internal |
531 | 540 |
532 #endif // V8_ARM_ASSEMBLER_ARM_INL_H_ | 541 #endif // V8_ARM_ASSEMBLER_ARM_INL_H_ |
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