From: Josh Marshall <joshua.r.marshall.1991@gmail.com>
To: ngn <ngn@ngn.tf>
Cc: linux-newbie@vger.kernel.org
Subject: Re: Feedback on my development setup
Date: Thu, 18 Apr 2024 15:15:34 -0400 [thread overview]
Message-ID: <CAFkJGRddGHK0j4CcQUoRKiD3afniLY=rRV5npY5wpauqqY0XZg@mail.gmail.com> (raw)
In-Reply-To: <ZiE9ydgMtpKOBLDk@archbtw>
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 $LINUX_REPO_PATH/vmlinux
: target remote:1234
<set break points>
: continue
On Thu, Apr 18, 2024 at 11:36 AM ngn <ngn@ngn.tf> wrote:
>
> On Wed, Apr 17, 2024 at 05:18:34PM -0400, Josh Marshall wrote:
> > One issue I'm seeing is that gdb isn't seeing debugging symbols. I'm
> > getting the following output with the config linked.
> >
> > https://pastebin.com/tjq7QtQk
> >
> > ```
> > anadon@botamon:~/Documents/code/linux$ 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.
next prev parent reply other threads:[~2024-04-18 19:15 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-16 12:38 Feedback on my development setup Josh Marshall
2024-04-16 14:56 ` ngn
2024-04-16 15:03 ` Josh Marshall
2024-04-16 15:21 ` ngn
2024-04-17 16:11 ` Josh Marshall
[not found] ` <CAPzh0z8RySn429XYQHoP_c9UA+pb6SLHGhH40vQDhc3P2xiysQ@mail.gmail.com>
2024-04-17 21:18 ` Josh Marshall
2024-04-18 15:35 ` ngn
2024-04-18 19:15 ` Josh Marshall [this message]
2024-04-18 19:27 ` Josh Marshall
2024-04-18 19:52 ` Josh Marshall
2024-04-18 21:40 ` Josh Marshall
2024-04-19 16:14 ` ngn
2024-04-23 15:34 ` Josh Marshall
2024-04-23 16:08 ` Pranjal Singh
2024-04-23 16:39 ` Bilbao, Carlos
2024-04-23 17:43 ` Josh Marshall
2024-04-25 5:37 ` Josh Marshall
2024-04-25 14:36 ` Bilbao, Carlos
2024-04-25 14:54 ` Josh Marshall
2024-04-25 15:14 ` Jonathan Corbet
[not found] ` <CAFkJGReoq2s+LR1kj1hj8QvsKsEhk+CLYtCXV=DQTjTqan3DOg@mail.gmail.com>
2024-04-25 16:59 ` Carlos Bilbao
2024-04-25 17:08 ` Josh Marshall
2024-04-25 20:14 ` Theodore Ts'o
2024-04-25 20:02 ` Theodore Ts'o
2024-04-25 14:32 ` Thomas Bertschinger
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