Re: 64bit startup

[Samuel Thibault]

Samuel Thibault, le sam. 10 juin 2023 01:47:00 +0200, a ecrit:
> Sergey Bugaev, le ven. 09 juin 2023 20:49:44 +0300, a ecrit:
> > with the following hacky patch, I no longer see any crashes,
> 
> That does help indeed.
> 
> When I'm using rumpdisk I'm still observing crashes, however, more
> precisely:
> 
> Kernel General protection trap, eip 0xffffffff81011eee
> kernel: General protection (13), code=2000
> Stopped       at  0xffffffff81011eee: mov     %ax,%es
> 0xffffffff81011eee(ffffffffbfbd4618,ffffffffbfff5230,ffffffffbe396d50,ffffffffbe396d90,ffffffff8103705b)
> 
> That's:
> 
> ffffffff81011ee9 t _kret_popl_fs
> ffffffff81011ee9 t _kret_popl_gs
> ffffffff81011eed t _kret_popl_es
>    0xffffffff81011eed <+0>:   pop    %rax
>    0xffffffff81011eee <+1>:   mov    %eax,%es
> ffffffff81011ef0 t _kret_popl_ds
> ffffffff81011f12 t _kret_iret

Ah, it happens without rumpdisk, too.

%rax at that point can be 0x30, 0xffffffffa72006c8, 0xffffffff983b5fff,
0x103a260, etc.

Samuel