如何做到86 code源代码级调试，里面QEMU GDB？ [英] How to do source level debugging of x86 code with GDB inside QEMU?

问题描述

我写了MBR部分中的x86汇编程序。
我编译如下：

I wrote a x86 assembly program for MBR section. I compile it as follows:

nasm hellombr.asm -f bin -o hellombr.img

然后我在qemu的运行它：

Then I run it in qemu:

qemu -fda hellombr.img -boot a

问题是我如何调试我的程序在源代码级？

The question is how can I debug my program at source level?

推荐答案

您应该让 NASM 在ELF文件中创建调试符号，然后转储这平坦的二进制在MBR中使用。然后，您可以指示GDB从ELF文件中读取所需的符号。

You should let nasm create the debugging symbols in an ELF file and then dump this to a flat binary to be used in the MBR. You can then instruct GDB to read the necessary symbols from the ELF file.

然后将整个过程将变得像这样：

The complete procedure would then become something like this:

$ nasm hellombr.asm -f elf -g -o hellombr.elf
$ objcopy -O binary hellombr.elf hellombr.img
$ qemu -s -S -fda hellombr.img -boot a
$ gdb
(gdb) symbol-file hellombr.elf
(gdb) target remote localhost:1234

有关我传递给 QEMU 看<一个标志的说明href=\"http://stackoverflow.com/questions/9865657/os-debugger-for-ubuntu-11-10/10283339#10283339\">this的回答。

For an explanation of the flags I pass to qemu see this answer.

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