Re: qemu-riscv32 usermode still broken?

[LIU Zhiwei <baxiantai@gmail.com>]

On 2023/9/13 6:31, Andreas K. Huettel wrote:
> Dear all,
>
> I've once more tried to build up a riscv32 linux install in a qemu-riscv32
> usermode systemd-nspawn, and am running into the same problems as some time
> ago...
>
> https://dev.gentoo.org/~dilfridge/riscv32/riscv32.tar.xz   (220M)
>
> The problems manifest themselves mostly in bash; if I replace /bin/bash
> with a static x86-64 binary (in the tarball as /bin/bash.amd64), bypassing
> qemu, I can make the chroot rebuild itself completely.
>
> https://lists.gnu.org/archive/html/bug-bash/2023-09/msg00119.html
> ^ Here I'm trying to find out more.
>
> Bash tests apparently indicate that argv[0] is overwritten, and that
> reading through a pipe or from /dev/tty fails or loses data.
>
> Apart from the bash testsuite failing, symptoms are as follows:
>
> * Something seems wrong in the signal handling (?):

If it is wrong for signal handling and for 32-bit, I guess it may be 
fixed by this patch

https://www.mail-archive.com/qemu-devel@nongnu.org/msg981238.html

And this patch has been merged into master branch yesterday.


May be you can have a try based on the master branch.

Thanks,
Zhiwei

> --- our package manager (bash/python combo, there bash) hangs reproducibly at
> one point.
> --- when I run a console program and try to background it with ctl-z, it hangs
>      (only the first time per bash instance, it seems)
>      repeated ctl-c gets me back to the shell, then the program is in the
> background
>
> riscv32 ~ # python
> Python 3.11.5 (main, Aug 31 2023, 21:56:30) [GCC 13.2.1 20230826] on linux
> Type "help", "copyright", "credits" or "license" for more information.
> [1]+  Stopped                 python
> ^C^C^C^C^C^C^C
> riscv32 ~ # ^C
> riscv32 ~ #
> riscv32 ~ # jobs
> [1]+  Stopped                 python
> riscv32 ~ # fg
> python
>
>
> --- make, when building something, seems to always start only one job in
> parallel
>
> Any advice or debugging would be appreciated.
>
> If we get this running then I can set up regular riscv32 Gentoo stage builds
> within a week. [*]
>
> Thanks in advance,
> Andreas
>
> PS.
> huettel@pinacolada ~ $ /var/lib/machines/riscv32/usr/bin/qemu-riscv32 -version
> qemu-riscv32 version 8.1.0
> Copyright (c) 2003-2023 Fabrice Bellard and the QEMU Project developers
>
>
> [*] https://www.gentoo.org/downloads/#riscv
>