Hi, Thanks for replying. Actually, I just wanted to know what kernel config variables are needed to make tftp work in vanilla linux. I get the message "tftp: sendto: Network is unreachable". With another default config, I can use tftp on qemu machine but still the kernel image size is big so I tried to reduce the size and reduce the experiment cycle time. But now I know I can build my test platform driver into a kernel module I can do away with it. Maybe I'll just try this "finding minimal config for tftp " later. (I though because the shell itself is the busybox, maybe I could find where the program is loaded and set breakpoint in the tftp entrance or condition, but couldn't find where busybox was loaded.) Thank you. Chan Kim
-----Original Message----- From: Richard <richard_siegfried@systemli.org> Sent: Friday, July 8, 2022 8:46 AM To: kernelnewbies@kernelnewbies.org Subject: Re: Can I debug busybox program running on a qemu virtual machine using gdb?
Hi,
If the goal is only to understand tftp and it's not something hardware dependend I would debug it on my normal desktop system/notebook. My distro (debian) has a busybox package. It does not provide the symlinks to change the ARGV[0] but you can create them manually and then debug locally as usually with your prefered tool (emacs recommended :) ).
If it has to be in quemu, I see no reason against it, the normal rules for remote debugging apply.
-- Richard Sailer
On 07/07/2022 11:27, Chan Kim wrote:
Hi all,
I'm trying to track how tftp program runs when I run tftp provided by busybox on qemu virtual machine. I can debug the linux source but I cannot debug tftp (busybox) program. Can I debug busybox program using gdb in this case? Any hint or advice will be very appreciated. Thank you!
Chan Kim
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies