CN102193788B - Method for multiplexing cross-platform driver based on binary translation - Google Patents

Abstract

The invention belongs to the field of computer system software and software application, and relates to a cross-platform driver multiplexing method based on dynamic binary translation. It includes: based on dynamic binary translation technology, build a lightweight independent operating environment for the driver in the target operating system; use binary translation module to realize cross-platform instruction set conversion, and heterogeneous file format loading module to realize multiplexing of different file formats , using the system service simulation module to provide cross-platform system services, and the general hardware control module to realize the operation of hardware devices. The invention can effectively realize the cross-platform reuse of the binary driver program, and realize the reuse of the existing binary driver program among different processors and different operating systems without source code and recompilation. The invention is beneficial to various processors and operating systems, and realizes effective support for a large number of external devices with less development cost.

Description

Cross-platform Driver Reuse Method Based on Dynamic Binary Translation

technical field

The invention belongs to the field of computer system software and software application, and relates to a cross-platform driver multiplexing method based on dynamic binary translation. It specifically involves the application of multiplexing of drivers between different platforms and enhancing the reliability of drivers.

Background technique

In recent years, due to various factors such as national security and national economic development, safe and effective processor chips and operating systems have increasingly shown their vital strategic significance, and relevant state departments have paid attention to this field of technology with support. In recent years, domestically developed chips and operating systems have emerged, such as the Godson general-purpose processor developed by a research institution, and the Galaxy Kylin operating system developed by a technology company. However, the true practicality and popularization of the autonomous computing platform composed of the processor chip and the operating system still faces the challenge of cooperating with a large number of existing external devices. As an extension of the operating system, the driver realizes the interworking between the main body of the computer and different external devices, so the maturity of the operating system depends on whether there are enough drivers to support various external devices, such as more than 70% of the code in the Microsoft Windows operating system is a device driver. For newly developed computing platforms, it is not realistic to completely redevelop all device drivers, so how to maximize the reuse of existing drivers and realize cross-platform reuse of drivers has become the key to practical and popular new computing platforms.

However, the implementation of the driver depends on the driver programming model provided by the operating system, and the two are tightly coupled together. There is no unified standard for the driver programming model provided by the current operating system, and there are huge differences in various aspects from the programming interface to the provided system services to the physical hardware operation mode. Therefore, for the same external device, the driver implementations on different operating systems are completely different and cannot be reused. On the other hand, different processors such as Intel's x86 processor and the Loongson processor of the Chinese Academy of Sciences use completely different instruction sets. Drivers are often released in binary form, except for a few open source implementations that do not provide source code, so even the same operating system cannot directly reuse drivers on different processor platforms. This directly leads to serious scalability problems in the driver, which depends on the underlying processor and operating system environment, making it difficult to achieve cross-platform binary reuse.

The existing solution is that hardware manufacturers or operating system developers write special drivers for different operating system environments. However, due to development cost considerations, only a few mainstream operating system platforms, such as Microsoft Windows operating system, can get comprehensive driver support. Moreover, these drivers do not disclose the source code, but only provide binary versions for some processor platforms. For a large number of non-mainstream or emerging operating systems, such as domestic self-developed operating systems, they often do not get the support of hardware manufacturers, and can only write drivers for some of the most commonly used external devices to realize some of the main functions. Even drivers on a mature operating system platform like Linux with a large number of users still suffer from limited support, slow upgrades, poor reliability, and poor performance.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art, the main solution is how to realize the binary multiplexing of drivers between computing platforms composed of different processors and operating systems, and provide a cross-platform driver multiplexing based on dynamic binary translation. Use technology.

Because the prior art binary driver depends on the underlying processor and operating system, to achieve cross-platform binary reuse, it is necessary to overcome the differences caused by the differences from the instruction set to the file format, from the system service call to the hardware device operation, etc. difficulty.

In order to solve the above problems, the present invention provides a cross-platform driver reuse technology based on dynamic binary translation, which includes: building a lightweight independent operating environment for the driver in the target operating system based on the dynamic binary translation technology; The binary translation module is used to realize cross-platform instruction set conversion, the heterogeneous file format loading module is used to realize multiplexing of different file formats, the system service simulation module is used to provide cross-platform system services, and the general hardware control module realizes the operation of hardware devices.

In the present invention, the core of the multiplexing technology based on binary translation is a binary translation module, which uses the mature dynamic binary translation technology in emulators and simulators to realize cross-platform instruction set conversion. The dynamic binary translation technology can realize the dynamic translation from the source instruction sequence to the target instruction sequence, and can perform targeted processing on special instructions on demand, making the binary multiplexing of cross-processor instruction sets possible. The dynamic binary translation technology only needs to implement the translation rules from the general intermediate instruction set to the new processor instruction set at one time, which has good generality and is independent of specific hardware devices and drivers. For drivers that need to be reused, the translation module first dynamically translates the binary driver code using the source instruction set into the intermediate instruction set code at runtime, and then translates it into the final code that can be used on the new processor according to the added translation rules. Executed binary code. Moreover, compared with ordinary applications, the driver code itself has the characteristics of long running cycle, relatively stable code execution flow, and insensitive sequence interaction, which is conducive to apportioning and optimizing the performance impact of dynamic binary translation technology.

In the present invention, different operating system platforms adopt multiple different binary file formats, and even the same operating system supports multiple different formats. The heterogeneous file format loading module supports binary file formats under different platforms in a plug-in manner, and completes the work of loading binary files from the disk to the memory process space. The system service simulation module provides the driver program with the same system service as the driver program. The light-weight source system service is simulated by the system service on the target system platform, and the redirection of the service call is realized by the dynamic binary translation module, so that the binary driver can complete the necessary operation with the help of the target system service. Finally, the common hardware control module abstracts the common bottom-level operations in hardware operations, and separates the driver's dependence on the kernel environment. Make the driver run in the user mode, and the general hardware control module will act as an agent to complete the necessary kernel mode operations, such as creating the application program interface on the target platform, reading and writing the registers of the hardware peripherals, etc.

The beneficial effect of the present invention is that the cross-platform multiplexing of binary drivers can be effectively realized, and the existing binary drivers can be reused between different processors and different operating systems by using techniques such as dynamic binary translation without source code and recompilation. driver. The invention is beneficial to the practicability and popularization of various processors and operating systems, especially the self-developed computing platform, and realizes effective support for a large number of external devices with less development cost.

For ease of understanding, the present invention will be described in detail below through specific drawings and embodiments. It should be pointed out that the specific examples and accompanying drawings are only for illustration. Obviously, those skilled in the art can make various amendments and changes within the scope of the present invention according to the description herein. These amendments and Modifications are also included within the scope of the present invention.

Description of drawings

FIG. 1 is a schematic diagram of the architecture of the binary driver cross-platform multiplexing technology of the present invention.

detailed description

Example 1

Figure 1 describes the overall system architecture of the cross-platform driver multiplexing technology based on dynamic binary translation. The load module first loads the driver into the process space using the appropriate format plugin depending on the binary driver file type. When an instruction in the driver program needs to be executed, the dynamic binary translation module first translates the corresponding source instruction sequence segment into the target processor instruction sequence segment and then executes it, and the result is saved in the translation buffer to avoid multiple translations. The system service request on the source operating system in the driver, such as the request to allocate memory space, is intercepted by the translation module and redirected to the system service simulation module. The service simulation module uses system services on the target operating system to simulate fulfillment requests. The interaction between the driver program and common applications and physical hardware devices, as well as the access to kernel mode resources are all performed by the general hardware control module located in the kernel mode.

Claims (2)

1. method for multiplexing cross-platform driver based on binary translation, it is characterised in that comprising: build lightweight independent operating environment for driver in destination OS；Wherein, it is respectively adopted binary translation module and realizes the conversion of cross-platform instruction set, heterogeneous file form loading module realizes different file format multiplexing, provides cross platform system service with system service analog module, and common hardware control module realizes the operation of hardware device；

Described binary translation module uses binary translation technology in emulator and simulator to realize the conversion of cross-platform instruction set, and wherein binary translation technology realizes from sourse instruction sequence to the dynamic translation of target instruction target word sequence, and on-demand processes；

Described heterogeneous file form loading module with plug-in unit mode expansible support the binary file format under different platform, complete to be loaded into binary file from disk the work of the internal memory process space；

Described system service analog module provides the system service consistent with driver for driver.

2. the method as described in claim 1, it is characterised in that wherein said binary translation technology realizes from general intermediate command set to the translation rule of new processor instruction set, and independent of particular hardware Devices and Drivers.