Netty - UDP服务器(Netty - UDP server)

 入口点RVA，入口点原始地址和图像基址以这种方式不相关。 
 
 图像库是“当它加载到存储器中时图像的第一个字节的首选地址”。 换句话说，假设没有冲突，它是加载时图像的虚拟地址。 如果在加载图像时存在地址冲突（例如，已经在重叠范围中加载了另一图像），则将为图像选择新的基地址。 
 
 RVA是相对虚拟地址。 它是“相对的”，因为它在实际加载图像时会发生变化。 它是未知基址的地址（例如，未加载图像时）。 加载映像后，RVA将成为虚拟地址（VA），即虚拟内存中的实际地址。 
 
 原始与RVA的区别在于对齐。 部分对齐（部分在加载到内存时对齐）以及文件对齐（部分中原始数据的对齐）。 这里的节对齐是0x1000，而文件对齐是0x200。 
 
 入口点RVA用于确定加载图像时入口点的VA（即入口点将位于虚拟地址EntryPoint (rva) + ImageBase ）。 入口点原始地址是入口点所在文件的偏移量。 
 
 本文档对齐有很好的解释。 

The entry point RVA, entry point raw address, and image base address are not related in that way.
 
The image base is the "preferred address of the first byte of the image when it is loaded in memory". In other words, it's the virtual address of the image when it gets loaded assuming there's not a conflict. If there is an address conflict when the image is loaded (e.g. another image is already loaded in an overlapping range), then a new base address will be chosen for the image.
 
An RVA is a relative virtual address. It is "relative" in the sense that it is changed when the image is actually loaded. It's the address when the base address is not known (e.g. when the image isn't loaded). Once the image is loaded, the RVA becomes a virtual address (VA), an actual address in virtual memory.
 
The raw vs. RVA distinction is due to alignment. There is section alignment (the alignment of the sections when they get loaded into memory) as well as file alignment (the alignment of the raw data in the sections). The section alignment here is 0x1000 while the file alignment is 0x200.
 
The entry point RVA is used to determine the VA of the entry point when the image is loaded (i.e. the entry point will be located at virtual address EntryPoint (rva) + ImageBase). The entry point raw address is the offset into the file where the entry point is located.
 
This document has a good explanation of alignment.