kernel_debug

• A linux kernel debug env based on qemu and gdb

what you need

1. linux kernel src (git clone from git@github.com:torvalds/linux.git)
2. qemu
3. cgdb
4. ...

steps

1. download linux kernel src and compile it to vmlinux (with debug_info and no any install)
2. pull debug_kernel and put it in the first level of linux kernel src code
3. cd debug_kernel && make mad (details are in Makefile)
   • gen manual ramdisk.img including busybox with the most basic linux cmd
4. cd debug_kernel && make dr
5. edit file gdbinit in first level and replace target remote:1236 of yours
   • 1236 is the gdbserver listen port, corresponding to the port you specify in Makefile
6. cgdb -q -x gdbinit
7. More details are in Makefile, you can choose kinds of blocks (ahci disk, nemv ssd, nvdimm, etc.) to debug corresponding driver and all parts in kernel, you can gen backend storage file by Makefile

features (details are in Makefile)

1. debug kernel without block dev
2. debug kernel with a ahci disk device in /dev
3. debug nvdimm with a nvdimm device in /dev
4. debug nvme ssd with a nvme ssd device in /dev
5. debug pcie hba by vfio

cgdb

To be continued ...