我怎样才能在我的程序中获得_GLOBAL_OFFSET_TABLE_地址？ [英] How can I get the _GLOBAL_OFFSET_TABLE_ address in my program?

问题描述

我想在我的程序中得到_GLOBAL_OFFSET_TABLE_的地址。一种方法是在Linux中使用 nm 命令，可能会将输出重定向到文件并解析该文件以获取_GLOBAL_OFFSET_TABLE_的地址。但是，这种方法似乎效率很低。什么是更有效的方法呢？

解决方案

这似乎有效：

  #include< stdio.h> 
 
 extern void * _GLOBAL_OFFSET_TABLE_; 
 
 int main（）
 {
 printf（_ GLOBAL_OFFSET_TABLE =％p \ n，& _GLOBAL_OFFSET_TABLE_）; 
返回0; 
 
 code $ 
 
 $ b $ p 
它给出：
 
 
  $ ./test 
 _GLOBAL_OFFSET_TABLE = 0x6006d0 
  
然而， nm 认为不同： 
 
 
  $ nm test | fgrep GLOBAL 
 0000000000600868 d _GLOBAL_OFFSET_TABLE_ 
  
 
I want to get the address of _GLOBAL_OFFSET_TABLE_ in my program. One way is to use the nm command in Linux, maybe redirect the output to a file and parse that file to get address of _GLOBAL_OFFSET_TABLE_. However, that method seems to be quite inefficient. What are some more efficient methods of doing it? 
解决方案
This appears to work:
#include <stdio.h>

extern void *_GLOBAL_OFFSET_TABLE_;

int main()
{
    printf("_GLOBAL_OFFSET_TABLE = %p\n", &_GLOBAL_OFFSET_TABLE_);
    return 0;
}
It gives:
$ ./test
_GLOBAL_OFFSET_TABLE = 0x6006d0
However, nm thinks different:
$ nm test | fgrep GLOBAL
0000000000600868 d _GLOBAL_OFFSET_TABLE_


                        
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