如何将程序加载到与目标地址不同的内存中? [英] How to load a program in memory at a different address than it is intended for?

问题描述

通常，用户程序二进制文件将被装入程序地址空间中的低地址(通常在0x400000附近)，该地址将在elf二进制文件中指定(对于linux).

Generally the user program binaries will be loaded in low address (usually around 0x400000) in the programs address space which will be specified in the elf binary (in the case of linux).

我们是否可以强制用户二进制文件在高地址处加载，可能在libc或其他此类库已加载的地址的2GB地址范围内?

Can we force a user binary to load at a high address, possibly within the 2GB range of addresses where libc or other such libraries are loaded?

我尝试过在网上找到解决方案，但是找不到任何具体的解决方案.

I have tried finding a solution on the net but could not find any concrete solution for this.

(我正在使用Ubuntu 12.10 64位OS)

(I am working on Ubuntu 12.10 64bit OS)

谢谢

推荐答案

除非二进制文件与位置无关(PIE)，否则这是不可能的.正常(非PIE)二进制文件在链接时针对特定的加载地址进行了硬编码，并且在链接期间，重新定位到其他地址所需的信息已经丢失.

Unless the binary is position-independent (PIE), this is not possible. Normal (non-PIE) binaries are hard-coded for a particular load address at link time, and during linking, the information necessary for relocating to a different address was already lost.

编辑:以上假设您正在使用现有的二进制文件.如果您自己生成二进制文件，则可以使用以下链接选项控制硬编码到二进制文件中的加载地址:

The above is assuming you're working with an existing binary. If you are producing the binary yourself, you can control the load address that's hard-coded into it with the following link options:

-Wl,-Ttext-segment,0x80000000

用您想要的地址替换0x80000000.某些地址(例如保留给内核使用的地址，通常从0xc0000000开始)将不起作用，并且该地址必须是页面对齐的(最后3个十六进制数字必须为0).

replacing 0x80000000 by your desired address. Certain addresses (such as those reserved for kernel use, typically beginning at 0xc0000000) will not work, and the address must be page-aligned (the last 3 hex digits must be 0).

这篇关于如何将程序加载到与目标地址不同的内存中?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！