如何找到@PAGE/@PAGEOFF的偏移值 [英] How to find the offset value of @PAGE/@PAGEOFF

问题描述

查看反汇编代码，我看到如下指令:

Looking into a disassembly code, I saw the instructions like:

adrp x8,l066@PAGE
add x8,x8,l066@PAGEOFF

它们是在某处定义的偏移标签吗?以及如何找到它们的价值?

Are they the offset labels being defined somewhere? And how to find the value of them?

推荐答案

@page 和 @pageoff 是汇编指令，用于计算链接时的偏移量.@page 取符号的位置无关的 4k 页偏移量，并使用 PC 将其转换为绝对页地址.@pageoff 给出符号所在页面的偏移量.它们一起能够以与位置无关的方式生成 64 位地址.

@page and @pageoff are assembler directives to calculate the offset at link time. @page takes the position independent 4k page offset of the symbol and uses the PC to convert it into an absolute page address. @pageoff gives the offset into the page that the symbol is located. Together they are able to generate a 64-bit address in a position-independent way.

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