The Tor Browser / file comparison
comparison: js/src/jit/x86/Assembler-x86.cpp
js/src/jit/x86/Assembler-x86.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:54f6d88c1c48 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "jit/x86/Assembler-x86.h" | |
| 8 | |
| 9 #include "gc/Marking.h" | |
| 10 | |
| 11 using namespace js; | |
| 12 using namespace js::jit; | |
| 13 | |
| 14 ABIArgGenerator::ABIArgGenerator() | |
| 15 : stackOffset_(0), | |
| 16 current_() | |
| 17 {} | |
| 18 | |
| 19 ABIArg | |
| 20 ABIArgGenerator::next(MIRType type) | |
| 21 { | |
| 22 current_ = ABIArg(stackOffset_); | |
| 23 switch (type) { | |
| 24 case MIRType_Int32: | |
| 25 case MIRType_Pointer: | |
| 26 stackOffset_ += sizeof(uint32_t); | |
| 27 break; | |
| 28 case MIRType_Float32: // Float32 moves are actually double moves | |
| 29 case MIRType_Double: | |
| 30 stackOffset_ += sizeof(uint64_t); | |
| 31 break; | |
| 32 default: | |
| 33 MOZ_ASSUME_UNREACHABLE("Unexpected argument type"); | |
| 34 } | |
| 35 return current_; | |
| 36 } | |
| 37 | |
| 38 const Register ABIArgGenerator::NonArgReturnVolatileReg0 = ecx; | |
| 39 const Register ABIArgGenerator::NonArgReturnVolatileReg1 = edx; | |
| 40 const Register ABIArgGenerator::NonVolatileReg = ebx; | |
| 41 | |
| 42 void | |
| 43 Assembler::executableCopy(uint8_t *buffer) | |
| 44 { | |
| 45 AssemblerX86Shared::executableCopy(buffer); | |
| 46 | |
| 47 for (size_t i = 0; i < jumps_.length(); i++) { | |
| 48 RelativePatch &rp = jumps_[i]; | |
| 49 JSC::X86Assembler::setRel32(buffer + rp.offset, rp.target); | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 class RelocationIterator | |
| 54 { | |
| 55 CompactBufferReader reader_; | |
| 56 uint32_t offset_; | |
| 57 | |
| 58 public: | |
| 59 RelocationIterator(CompactBufferReader &reader) | |
| 60 : reader_(reader) | |
| 61 { } | |
| 62 | |
| 63 bool read() { | |
| 64 if (!reader_.more()) | |
| 65 return false; | |
| 66 offset_ = reader_.readUnsigned(); | |
| 67 return true; | |
| 68 } | |
| 69 | |
| 70 uint32_t offset() const { | |
| 71 return offset_; | |
| 72 } | |
| 73 }; | |
| 74 | |
| 75 static inline JitCode * | |
| 76 CodeFromJump(uint8_t *jump) | |
| 77 { | |
| 78 uint8_t *target = (uint8_t *)JSC::X86Assembler::getRel32Target(jump); | |
| 79 return JitCode::FromExecutable(target); | |
| 80 } | |
| 81 | |
| 82 void | |
| 83 Assembler::TraceJumpRelocations(JSTracer *trc, JitCode *code, CompactBufferReader &reader) | |
| 84 { | |
| 85 RelocationIterator iter(reader); | |
| 86 while (iter.read()) { | |
| 87 JitCode *child = CodeFromJump(code->raw() + iter.offset()); | |
| 88 MarkJitCodeUnbarriered(trc, &child, "rel32"); | |
| 89 JS_ASSERT(child == CodeFromJump(code->raw() + iter.offset())); | |
| 90 } | |
| 91 } | |
| 92 |
