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Dynamic binary translation (DBT) is a core technology to many important applications such as system virtualization, dynamic binary instrumentation, and security. However, there are several factors that often impede its performance: 1) emulation overhead before translation; 2) translation and optimization overhead; and 3) translated code quality. The issues also include its retargetability that supports...
Code discovery has been a main challenge for static binary translation, especially when the source ISA (Instruction Set Architecture) has variable-length instructions, such as the X86 architectures. Due to embedded data such as PC-relative data, jump tables, or paddings in the code section, a binary translator may be misled to translate data as instructions. With variable length instructions, once...
Static binary translation (SBT) systems and dynamic binary translation (DBT) systems have their own merits and disadvantages. SBT can perform whole-program optimizations and do not incur run-time overheads. However, the code discovery and the code location problems caused by indirect branches make SBT systems hard to develop. On the other hand, DBT can perform optimizations based on program's runtime...
This paper presents an LLVM+QEMU (LnQ)framework for building high performance and retargetable binary translators with existing compiler modules. Dynamic binary translation is a just-in-time (JIT) compilation from binary code of guest ISA to binary code of host ISA. The quality of translated code is critical to the performance of a dynamic binary translator, which translates code between different...
Dynamic Binary Translation (DBT) has been widely used in various applications. Although new architectures and micro-architectures often create performance opportunities for programmers and compilers, such performance opportunities may not be exploited by legacy executables. For example, the additional general-purpose and XMM registers in the Intel64 architecture do not benefit the IA-32 binaries....
Binary translation (BT) has been an important approach to migrate application software across instruction set architectures (ISAs). Some architectures, such as X86, allow misaligned data accesses (MDAs), while most modern architectures have the alignment restriction that requires data to be aligned in memory on natural boundaries. In a binary translation system, where the source ISA allows MDA and...
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