与ARM LDR指令关联的哈希(#)值是什么意思? [英] What does the hash (#) value associated with the ARM LDR instruction mean?

问题描述

我正在尝试调试应用程序中遇到的崩溃.堆栈跟踪指向具有以下格式的LDR指令(感谢反汇编程序):

I'm trying to debug a crash I am experiencing in my application. The stack trace is pointing to an LDR instruction with the following format (thanks disassembler):

LDR R3, [R0,#4]

我的问题是关于源组件.第二个参数中的#4是什么意思?我假设这是某种偏移，但是我还没有找到支持LDR指令的文档.

My question is in regards to the source component. What does the #4 in the second parameter mean? I'm assuming it is some kind of offset, but I haven't found documentation supporting that for the LDR instruction.

推荐答案

它从R0 + 4字节的地址中加载R3.所以，是的，它是一个字节偏移量. 请参阅以下有关寻址模式的说明.

It loads R3 from the address in R0 + 4 bytes. So, yes, it is a byte offset. See this explanation of the addressing modes.

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