Realizing method of register window switching in binary translation

Abstract

The invention relates to a realizing method of register window switching technology in dynamic binary translation, belonging to the technical field of computers. The realizing method comprises the following steps: corresponding to all register windows on a source platform by using a section of continuous memory space; storing the address of the current register window in the corresponding simulated memory space on the source platform using a virtual register and simulating a control / state register and a global register by using the other fixed memory space, wherein the control / state register and the global register are irrelevant to the register windows; determining the positions of the registers of the source platform in the simulated memory in a second-level addressing mode; and dynamically adjusting the value of the virtual register when each register window switching instruction is translated at the front end of a translator. The invention uses the second-level addressing mode to enable the value of the virtual register to be adjusted only when each register window switching instruction is translated into an intermediate instruction, thereby effectively reducing memory access frequency and further improving the execution efficiency of object codes after translation.

Description

technical field [0001] The invention relates to a method for switching register windows in the technical field of computers, in particular to a method for realizing register window switching in binary translation. Background technique [0002] Dynamic binary translation is the most widely used method in virtual machine technology. It is an effective means to solve legacy code and improve the adaptability of software platforms. It can dynamically convert executable programs without source code. The binary program on the source machine platform and make it run on other target machine platforms. For the dynamic binary translator itself, execution performance is a very important measure. The so-called execution performance means that, taking the efficiency of the source program running under the original architecture as a reference, the lower the efficiency loss of the source program in the operating environment provided by the dynamic binary translator, the better the executio...

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Problems solved by technology

[0006] It can be seen that the first method requires many operations of copying between registers and memory access for each register window switching instruction, which is very inefficient; This method improves the efficiency a little, but it needs to analyze the data flow graph, which increases the complexity of the front end of the translator, and only eliminates a part of the operation of accessing the memory, without essentially improving the efficiency, because the register window switching instruction is executed The frequency is very high. Every time you want to save some register values ​​to the memory, it will inevitably increase a lot of memory read and write operations.

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