标签:Superviso super sign ref 分享 sig RoCE ram rup
1. ARM处理器支持7种工作模式
· 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
2. ARM状态寄存器(CPRS)
3. ARM寻址方式
①立即数寻址: ADD R0, R1, #0x01
②寄存器寻址:ADD R0, R1, R2
③寄存器间接寻址:LDR R0, [R2];
④基址变址寻址:LDR R0, [R1,#4]
⑤相对寻址:BL
4. ARM汇编指令介绍
标签:Superviso super sign ref 分享 sig RoCE ram rup
原文地址:https://www.cnblogs.com/wulei0630/p/9228642.html