关键词: 瞬态执行, 乱序执行漏洞测试, 中断, 内核调度器, Linux内核

Abstract: With the discovery of processor microarchitecture vulnerabilities represented by spectre and meltdown, microarchitecture security vulnerabilities have gradually attracted the attention of academia, and automatic testing schemes for related microarchitecture vulnerabilities have also been proposed. However, in the real test environment, the test microarchitecture environment will be interrupted and disturbed by the scheduling system, resulting in the omission of effective test cases. Therefore, this paper proposes an arm processor core isolation method for outoforder execution test. By using the management mechanism of interrupt and scheduling between ARM processor and Linux kernel and designing the corresponding process synchronization mechanism, this method can isolate the processor core from the interrupt and scheduling system during the test process, so as to ensure that the operation of test instruction block will not be interrupted by interrupt and scheduling program. The corresponding synchronization mechanism is designed to ensure that the process switching process will not be inserted and executed by other processes, so as to ensure the effectiveness of the test.

Key words: transient execution, outoforder vulnerabilities test, interrupt, kernel scheduler, Linux kernel