Add example of 64-bit debugging. --- contributing.mdwn | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/contributing.mdwn b/contributing.mdwn index c4a3787d..90705d93 100644 --- a/contributing.mdwn +++ b/contributing.mdwn @@ -199,6 +199,23 @@ After you have a Hurd vm set up and running: * Start hacking. * For shutting down, use `reboot`, then press `c` in grub and issue halt (to avoid filesystem corruption). Adding `--no-reboot` to the qemu line should help, too. +## Debug 64-bit gnumach + +[[build|microkernel/mach/gnumach/building/]] 64-bit gnumach + +run a spare Hurd vm (prepare for data loss in vm): + +* `kvm -net user,hostfwd=tcp:127.0.0.1:2222-:22 -net nic,model=e1000 -drive file=$(echo debian-hurd*.img),cache=writeback -m 1G` +* `cd gnumach/build` +* `scp -P 2222 gnumach.gz user@127.0.0.1:/home/user/` +* You may copy `gnumach.gz` (also create new grub entry) or replace using `mv /home/user/gnumach.gz /boot/gnumach-xxx.gz` +* Shutdown vm. +* Append `console=com0` in boot menu and switch to console mode in qemu. (We have known issues with vga output for 64-bit.) +* `kvm -s -S -net user,hostfwd=tcp:127.0.0.1:2222-:22 -net nic,model=e1000 -drive file=$(echo debian-hurd*.img),cache=writeback -m 1G` (note: `-s -S` added.) +* `gdb ./gnumach` +* `(gdb) target remote :1234` +* Press `c` to continue booting. + --- <a name="hurd_on_modern_microkernel"></a> # Design / Research: GNU Hurd on a Modern Microkernel -- 2.30.2
