Re: qemu-riscv32 usermode still broken?

["Andreas K. Huettel" <dilfridge@gentoo.org>]

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Hi Alistair, 

> 
> Ok!
> 
> So on my x86 machine I see this
> 
> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=285545,
> si_uid=1000, si_status=0, si_utime=0, si_stime=0} ---
> wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}],
> WNOHANG|WSTOPPED|WCONTINUED, NULL) = 285545
> wait4(-1, 0x7ffe3eeb8210, WNOHANG|WSTOPPED|WCONTINUED, NULL) = 0
> rt_sigreturn({mask=[INT]})              = 0
> close(3)                                = 0
> 
> It all looks ok.

This was fixed in the meantime (hooray!), sorry I didn't think anyone
would still look at the old thread. The commit is given below.

Since then we've been able to build riscv32 stages for Gentoo just fine
using qemu-user, see
https://www.gentoo.org/downloads/#riscv

Cheers,
Andreas

commit f0907ff4cae743f1a4ef3d0a55a047029eed06ff
Author:     Richard Henderson <richard.henderson@linaro.org>
AuthorDate: Fri Apr 5 11:58:14 2024 -1000
Commit:     Richard Henderson <richard.henderson@linaro.org>
CommitDate: Tue Apr 9 07:43:11 2024 -1000

    linux-user: Fix waitid return of siginfo_t and rusage
    
    The copy back to siginfo_t should be conditional only on arg3,
    not the specific values that might have been written.
    The copy back to rusage was missing entirely.
    
    Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2262
    Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
    Tested-by: Alex Fan <alex.fan.q@gmail.com>
    Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>



> 
> Maybe the host_to_target_siginfo() function in QEMU is the issue?
> Something in here?
> https://github.com/qemu/qemu/blob/master/linux-user/signal.c#L335
> 
> Nothing jumps out with a quick look though
> 
> Alistair
> 
> >
> >
> >
> > --
> > Andreas K. Hüttel
> > dilfridge@gentoo.org
> > Gentoo Linux developer
> > (council, toolchain, base-system, perl, libreoffice)
> 


-- 
Andreas K. Hüttel
dilfridge@gentoo.org
Gentoo Linux developer
(council, toolchain, base-system, perl, libreoffice)

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