| | 1 | /* |
| | 2 | * Copyright (C) 2013, 2014 Apple Inc. 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 |
| | 6 | * are met: |
| | 7 | * 1. Redistributions of source code must retain the above copyright |
| | 8 | * notice, this list of conditions and the following disclaimer. |
| | 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 10 | * notice, this list of conditions and the following disclaimer in the |
| | 11 | * documentation and/or other materials provided with the distribution. |
| | 12 | * |
| | 13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| | 14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| | 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| | 17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| | 18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| | 19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| | 20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| | 21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| | 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| | 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| | 24 | */ |
| | 25 | |
| | 26 | #include "config.h" |
| | 27 | #include "Disassembler.h" |
| | 28 | |
| | 29 | #if ENABLE(DISASSEMBLER) |
| | 30 | #if USE(UDIS86) || (USE(LLVM_DISASSEMBLER) && (CPU(X86_64) || CPU(X86))) |
| | 31 | |
| | 32 | #include "MacroAssemblerCodeRef.h" |
| | 33 | #include "Options.h" |
| | 34 | #include "UDis86Disassembler.h" |
| | 35 | #include "LLVMDisassembler.h" |
| | 36 | |
| | 37 | namespace JSC { |
| | 38 | |
| | 39 | // This horrifying monster is needed because neither of our disassemblers supports |
| | 40 | // all of x86, and using them together to disassemble the same instruction stream |
| | 41 | // would result in a fairly jarring print-out since they print in different |
| | 42 | // styles. Maybe we can do better in the future, but for now the caller hints |
| | 43 | // whether he's using the subset of the architecture that our MacroAssembler |
| | 44 | // supports (in which case we go with UDis86) or if he's using the LLVM subset. |
| | 45 | |
| | 46 | bool tryToDisassemble(const MacroAssemblerCodePtr& codePtr, size_t size, const char* prefix, PrintStream& out, InstructionSubsetHint subsetHint) |
| | 47 | { |
| | 48 | if (Options::forceUDis86Disassembler()) |
| | 49 | return tryToDisassembleWithUDis86(codePtr, size, prefix, out, subsetHint); |
| | 50 | |
| | 51 | if (Options::forceLLVMDisassembler()) |
| | 52 | return tryToDisassembleWithLLVM(codePtr, size, prefix, out, subsetHint); |
| | 53 | |
| | 54 | if (subsetHint == MacroAssemblerSubset |
| | 55 | && tryToDisassembleWithUDis86(codePtr, size, prefix, out, MacroAssemblerSubset)) |
| | 56 | return true; |
| | 57 | |
| | 58 | if (subsetHint == LLVMSubset |
| | 59 | && tryToDisassembleWithLLVM(codePtr, size, prefix, out, LLVMSubset)) |
| | 60 | return true; |
| | 61 | |
| | 62 | if (tryToDisassembleWithUDis86(codePtr, size, prefix, out, subsetHint)) |
| | 63 | return true; |
| | 64 | if (tryToDisassembleWithLLVM(codePtr, size, prefix, out, subsetHint)) |
| | 65 | return true; |
| | 66 | |
| | 67 | RELEASE_ASSERT_NOT_REACHED(); |
| | 68 | return false; |
| | 69 | } |
| | 70 | |
| | 71 | } // namespace JSC |
| | 72 | |
| | 73 | #endif // USE(UDIS86) || USE(LLVM_DISASSEMBLER) |
| | 74 | #endif // ENABLE(DISASSEMBLER) |
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