SkyEye分析报告 - Open Enterprise Foundation …

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1、SkyEye分析报告http://hpclab.cs.tsinghua.edu.cn/~skyeye/陈渝http://hpclab.cs.tsinghua.edu.cn/~chenyu/chenyu@hpclab.cs.tsinghua.edu.cn清华大学计算机系高性能计算所2003-01-22目录SkyEye分析报告1前言4ARM7TDMI分析4ARM的模式4Registers4PSR相关4ProgramStatusRegisters4PSRTransfer(MRS,MSR)指令4AT91EB40分析4AT91X40启动引导说明(转载自英蓓特信息技术有限公司)4A

2、rmulator分析4调试armulator4当执行到targetsim时（装入二进制映像文件）4执行load后armulator堆栈（装入调试信息）4执行流程4当执行到targetsim时初始化的情况4当执行到load时4对读内存操作的处理4对写内存操作的处理4对中断向量读取的处理4配置4内存布局与uclinux的关系4与AT91结构相关的文件4时钟中断产生4armio.h4armio.c4armmem.h4armmem.c4armdefs.h4Uclinuxforarmulator分析4编译信息4linuxelf格式的生成4二进制映像文件的生成4定位信息4文件连接顺

3、序4vmlinux.lds4配置信息4代码信息4ATMEL的include文件中的信息4其它关键文件4初始化4driver4前言SkyEye基于armulator/GDB。本文档主要用于辅助SkyEye项目开发和对ucos、uclinux的进一步理解。文中存在不少错误和冗余的描述，欢迎指出！在阅读时，请注意红色和蓝色的文字，这些表示比较重要的地方。ARM7TDMI分析ARM的模式lUser(usr):ThenormalARMprogramexecutionstatelFIQ(fiq):Designedtosupportadatatransferorchannelproc

4、esslIRQ(irq):Usedforgeneral-purposeinterrupthandlinglSupervisor(svc):ProtectedmodefortheoperatingsystemlAbortmode(abt):EnteredafteradataorinstructionprefetchabortlSystem(sys):AprivilegedusermodefortheoperatingsystemlUndefined(und):EnteredwhenanundefinedinstructionisexecutedModechangesmay

5、bemadeundersoftwarecontrol,ormaybebroughtaboutbyexternalinterruptsorexceptionprocessing.MostapplicationprogramswillexecuteinUsermode.Thenon-usermodes-knownasprivilegedmodes-areenteredinordertoserviceinterruptsorexceptions,ortoaccessprotectedresources.RegistersARM7TDMIhasatotalof37registe

6、rs-31general-purpose32-bitregistersandsixstatusregisters-butthesecannotallbeseenatonce.Theprocessorstateandoperatingmodedictatewhichregistersareavailabletotheprogrammer.lRegister14isusedasthesubroutinelinkregister.ThisreceivesacopyofR15whenaBranchandLink(BL)instructionisexecuted.Atalloth

7、ertimesitmaybetreatedasageneral-purposeregister.ThecorrespondingbankedregistersR14_svc,R14_irq,R14_fiq,R14_abtand14_undaresimilarlyusedtoholdthereturnvaluesofR15wheninterruptsandexceptionsarise,orwhenBranchandLinkinstructionsareexecutedwithininterruptorexceptionroutines.l