Arm處理器寄存器介紹及匯編基礎
阿新 • • 發佈：2018-06-26
狀態 defined bubuko arm處理器 TP TE nsf 匯編 arm尋址
1. ARM處理器支持7種工作模式
· 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狀態寄存器（CPRS）
3. ARM尋址方式
①立即數尋址： ADD R0, R1, #0x01
②寄存器尋址：ADD R0, R1, R2
③寄存器間接尋址：LDR R0, [R2];
④基址變址尋址：LDR R0, [R1,#4]
⑤相對尋址：BL
4. ARM匯編指令介紹
Arm處理器寄存器介紹及匯編基礎