2015年荐SkyEye分析报告.doc

SkyEye分析报告 /~skyeye/ 陈渝 /~chenyu/ chenyu@ 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 4 ARM7TDMI分析 4 ARM的模式 4 Registers 4 PSR相关 4 Program Status Registers 4 PSR Transfer (MRS, MSR) 指令 4 AT91EB40分析 4 AT91X40启动引导说明(转载自英蓓特信息技术有限公司) 4 Armulator分析 4 调试armulator 4 当执行到target sim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target sim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 4 armio.h 4 armio.c 4 armmem.h 4 armmem.c 4 armdefs.h 4 Uclinux for armulator 分析 4 编译信息 4 linux elf格式的生成 4 二进制映像文件的生成 4 定位信息 4 文件连接顺序 4 vmlinux.lds 4 配置信息 4 代码信息 4 ATMEL的include文件中的信息 4 其它关键文件 4 初始化 4 driver 4  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 User (usr): The normal ARM program execution state FIQ (fiq): Designed to support a data transfer or channel process IRQ (irq): Used for general-purpose interrupt handling Supervisor (svc): Protected mode for the operating system Abort mode (abt): Entered after a data or instruction prefetch abort System (sys): A privileged user mode for the operating system Undefined (und): Entered when an undefined instruction is executed Mode changes may be made under software control, or may be brought about by external interrupts or exception processing. Most application programs will execute in User mode. The non-user modes - known as privileged modes - are entered in order to service interrupts or exceptions, or to access protected resources. Registers ARM7TDMI has a total of 37 registers - 31 general-purpose 32-bit registers and six status registers - but these cannot all be seen at once. The processor state and operating mode dictate which registers are available to the programmer. Register 14 is used as the subroutine link register. This receives a copy of R15 when a Branch and Link (BL) instruction is executed. At all other times it may be treated as a general-purpose register. The correspond