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LibX86: Add basic x86-64 support
Most of the 64-bit instructions default to 32-bit operands and select 64-bit using REX.W prefixes. Because of that instead of defining new instruction formats, this reuses the 32-bit formats and changes them to take the REX prefixes into account when necessary. Additionally this removes, adds or modifies the instruction descriptors in the 64-bit table, where they are different from 32-bit. Using 'disasm' these changes seem to cover pretty much all of our 64-bit binaries (except for AVX) :^) Note that UserspaceEmulator will need to account for these prefixed versions in its 32-bit instruction handlers before being usable on x86-64.
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3 changed files with 295 additions and 67 deletions
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@ -26,7 +26,7 @@ public:
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return Instruction::from_stream(m_stream, OperandSize::Size32, AddressSize::Size32);
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#else
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# if ARCH(X86_64)
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return Instruction::from_stream(m_stream, OperandSize::Size64, AddressSize::Size64);
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return Instruction::from_stream(m_stream, OperandSize::Size32, AddressSize::Size64);
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# else
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dbgln("Unsupported platform");
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return {};
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