英文:
How to build debug symbols from source?
问题
我想使用Kdump和Crash来调试我的内核。然而，我的内核是从源代码构建的。我无法通过apt-get install linux-image-$(uname -r)-dbg获取调试符号。我应该如何从源代码构建-dbg版本？
我的操作系统是Ubuntu 20.04，内核版本是v5.15.0。
英文:
I want to use Kdump and Crash to debug my kernel. However, my kernel was built from source. I can't get debug symbols through apt-get install linux-image-$(uname -r)-dbg. How could I build -dbg from source?
My OS is Ubuntu 20.04 and kernel is v5.15.0.
答案1
得分: 1
你可以通过启用 CONFIG_DEBUG_INFO 轻松编译内核并包含调试符号。如果你正在使用 make menuconfig，它将位于“Kernel hacking” -> “Compile-time checks and compiler options” -> “Compiler a kernel with debug info” 下。
如果你想将调试符号拆分到不同的 .dwo 文件中，还可以启用 CONFIG_DEBUG_INFO_SPLIT（在相同的菜单位置）。这应该与 linux-image-$(uname -r)-dbg 软件包包含的内容差不多。
英文:
You can easily compile the kernel with debug symbols by enabling CONFIG_DEBUG_INFO. If you are using make menuconfig it's going to be under "Kernel hacking" -> "Compile-time checks and compiler options" -> "Compiler a kernel with debug info".
If you want to have the debug symbols split in a different .dwo file you can also enable CONFIG_DEBUG_INFO_SPLIT (same location in the menu). This should be more or less the same thing that the linux-image-$(uname -r)-dbg package contains.
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