No.42701
作者：kevined
邮件：kevined@163.net
ID：11319
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QQ：13428525
文章数：46篇
最后登陆IP：218.244.227.122
最后登陆：2004/9/15 10:02:37
注册：2003/4/17 15:18:48
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发帖时间：2003/9/24 8:33:33
发贴者IP：61.179.111.144
标题：kevined:请教各位大虾，一下关于ARM的init.s的开始代码的意思？谢谢
摘要：No.42701请教各位大虾，一下关于ARM的init.s的开始代码的意思？谢谢
; --- Setup interrupt / exception vectors
IF :DEF: ROM_AT_ADDRESS_ZERO
; If the ROM is at address 0 this is just a sequence of branches
B Reset_Handler
B Undefined_Handler
B SWI_Handler
B Prefetch_Handler
B Abort_Handler
NOP ; Reserved vector
B IRQ_Handler
B FIQ_Handler
ELSE
; Otherwise we copy a sequence of LDR PC instructions over the vectors
; (Note: We copy LDR PC instructions because branch instructions
; could not simply be copied, the offset in the branch instruction
; would have to be modified so that it branched into ROM. Also, a
; branch instructions might not reach if the ROM is at an address
; > 32M).
MOV R8, #0
ADR R9, Ve ......
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