读取寄存器指向GDB的内存 [英] Reading memory pointed by register with GDB

问题描述

如果我知道内存位置，有没有办法从GDB查看内存内容？

这是我正在调试为我的操作系统课程编写的x86汇编程序。我想要做的是在x86上用C和gas（GNU汇编器）编写用于Linux的用户级线程库。我分配了自己的堆栈，并将esp寄存器指向了该内存位置。现在我想要做的是读取内存，看看我分配的堆栈中有什么。

解决方案

（ gdb ）

  p（int *）$ esp 
x / 20x $ esp 
p（（int *）$ esp）[3] 
  

Is there a way to look at memory content from GDB if I know the memory location.

That is I'm debugging a x86 assembly program I written for my Operating Systems Course. What I'm trying to do is to write a user level thread library for linux on x86 with C and gas (GNU assembler). I allocated my own stacks and I made the esp register point to that memory location. Now what I want to do is read the memory to see what is in that stack I allocated.

解决方案

I would try something like the following commands (under gdb)

 p (int*)$esp
 x /20x $esp
 p ((int*)$esp)[3]

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