So the final outline would look like the following? Source: https://github.com/archlinux/arch-boxes setup: git clone $LINUX_REPO & wget https://geo.mirror.pkgbuild.com/images/latest/Arch-Linux-x86_64-basic.qcow2 echo add-auto-load-safe-path “$LINUX_REPO_PATH/scripts/gdb/vmlinux-gdb.py” >> "$HOME/.config/gdb/gdbinit" echo ‘export LIBGUESTFS_DEBUG=1 LIBGUESTFS_TRACE=1’ >> $HOME/.bashrc echo ‘export USERCFLAGS=" -ggdb "’ >> $HOME/.bashrc push $LINUX_REPO_PATH echo “CONFIG_SATA_AHCI=y” >> .config echo “CONFIG_DEBUG_INFO=y” >> .config echo “CONFIG_DEBUG_INFO_DWARF5=y” >> .config echo “CONFIG_GDB_SCRIPTS=y” >> .config echo “CONFIG_GDB_INFO_REDUCED=n” >> .config echo “CONFIG_KGDB=y” >> .config echo “CONFIG_FRAME_POINTER=y” >> .config echo “CONFIG_KVM_GUEST=y” >> .config echo “CONFIG_RANDOMIZE_BASE=n” >> .config make localyesconfig pop source $HOME/.bashrc mkdir -p $HOME/mnt/arch Iterate: guestmount -w -a $HOME/Downloads/Arch-Linux-x86_64-basic.qcow2 -m /dev/sda3 ~/mnt/arch/ <copy sources, files, perform compilation steps, etc as needed to inside the VM image as needed each development iteration> umount ~/mnt/arch Term 1: qemu-system-x86_64 -s -cpu host -nographic -accel kvm -m 1G -kernel vmlinux2 -append "root=/dev/sda3 rw console=ttyS0,115200n8 nokaslr " -drive format=qcow2,file=$HOME/Downloads/Arch-Linux-x86_64-basic.qcow2 Term 2: gdb $LINUX_REPO_PATH/vmlinux : target remote:1234 <set break points> : continue On Thu, Apr 18, 2024 at 11:36 AM ngn <ngn@xxxxxx> wrote: > > On Wed, Apr 17, 2024 at 05:18:34PM -0400, Josh Marshall wrote: > > One issue I'm seeing is that gdb isn't seeing debugging symbols. I'm > > getting the following output with the config linked. > > > > https://pastebin.com/tjq7QtQk > > > > ``` > > anadon@botamon:~/Documents/code/linux$ gdb arch/x86/boot/bzImage > > GNU gdb (Ubuntu 15.0.50.20240403-0ubuntu1) 15.0.50.20240403-git > > Copyright (C) 2024 Free Software Foundation, Inc. > > License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> > > This is free software: you are free to change and redistribute it. > > There is NO WARRANTY, to the extent permitted by law. > > Type "show copying" and "show warranty" for details. > > This GDB was configured as "x86_64-linux-gnu". > > Type "show configuration" for configuration details. > > For bug reporting instructions, please see: > > <https://www.gnu.org/software/gdb/bugs/>. > > Find the GDB manual and other documentation resources online at: > > <http://www.gnu.org/software/gdb/documentation/>. > > > > For help, type "help". > > Type "apropos word" to search for commands related to "word"... > > Reading symbols from arch/x86/boot/bzImage... > > (No debugging symbols found in arch/x86/boot/bzImage) > > ``` > > > > You should load vmlinux to the gdb, not the bzImage. bzImage is a > compressed version of the kernel and its used boot, vmlinux is the > static ELF binary that contains the debugging symbols.
