linux - 从分段地址计算文字地址

Question

例如，假设我有这样的东西:

    0x33:0x10

并且我想获取以下形式的地址:

    0x????????

从中。这样做最简单的方法是什么？这是在 Linux x86 上。

Answer 1

The selector in the segment register is decoded to give a descriptor table specifier and a descriptor table index. The base given in the table and index is added to the offset in order to give a final address within process space.为了将进程内存转换为物理内存，the page tables must be read and decoded.