Il 21/03/23 15:38, Sergey Bugaev ha scritto:
But how does a core know its CPU number?
Currently through the APIC_ID register, see the CPU_NUMBER macro in
i386/i386/cpu_number.h.
This would've been easier if we could pass the port name as an env
variable, then we could pick some predefined n
On Tue, Mar 21, 2023 at 6:33 PM Almudena Garcia
wrote:
> > But how does a core know its CPU number?
>
> Calling cpu_number() function, or getting its APIC ID from its Local APIC
Ah.
That's too hardware-y for me to understand; but I see that cpu_number
() in i386/i386/cpu_number.c also uses apic,
On Tue, Mar 21, 2023 at 5:19 PM Luca wrote:
> > Every thread needs to have its own values of fs_base / gs_base, and
> > you need to store/restore them on context switch by accessing the
> > appropriate MSR. There's also the swapgs instruction that I'm told is
> > useful if you also use gs for kern
On Tue, Mar 21, 2023 at 5:19 PM Luca wrote:
> > Every thread needs to have its own values of fs_base / gs_base, and
> > you need to store/restore them on context switch by accessing the
> > appropriate MSR. There's also the swapgs instruction that I'm told is
> > useful if you also use gs for kern
Il 21/03/23 14:03, Sergey Bugaev ha scritto:
Ah, so you're saying the com port works, but VGA console (or whatever
it's called, I don't have a clue about hardware as you might have
noticed...) support is buggy? That makes sense, I will try com0, thank
you!
I suppose, yes, it might also be x86_6
On Tue, Mar 21, 2023 at 3:52 PM Luca wrote:
>
> Il 21/03/23 13:37, Sergey Bugaev ha scritto:
> > On Tue, Mar 21, 2023 at 3:20 PM Luca wrote:
> >> did you add $(task-resume) in the boot script?
> >
> > $(prompt-task-resume), yes.
> >
> > But (see my later mail) Mach hits a page fault trying to pri
Il 21/03/23 13:37, Sergey Bugaev ha scritto:
On Tue, Mar 21, 2023 at 3:20 PM Luca wrote:
did you add $(task-resume) in the boot script?
$(prompt-task-resume), yes.
But (see my later mail) Mach hits a page fault trying to printf "task
loaded:", it never gets to resuming the task. This must be
On Tue, Mar 21, 2023 at 3:20 PM Luca wrote:
> did you add $(task-resume) in the boot script?
$(prompt-task-resume), yes.
But (see my later mail) Mach hits a page fault trying to printf "task
loaded:", it never gets to resuming the task. This must be due to some
difference in how we're running QE
Il 21/03/23 11:28, Sergey Bugaev ha scritto:
On Tue, Mar 21, 2023 at 12:48 PM Luca wrote:
Great! if you still have issues with the long mode, you could try to
hack gnumach to wait at some point (e.g. user_bootstrap() or
setup_main()), attach with gdb and then continue. Either with some delay
or
On Tue, Mar 21, 2023 at 2:04 PM Sergey Bugaev wrote:
> It seems to parse the bootscript correctly. It starts the initial
> thread, which loads the ELF and then hangs right here (on printf???):
>
>
>
> Does that ring any bells?
Maybe this will shed some light:
(gdb) s
charput (pos=3840, ch=116 '
On Tue, Mar 21, 2023 at 1:28 PM Sergey Bugaev wrote:
>
> On Tue, Mar 21, 2023 at 12:48 PM Luca wrote:
> > Great! if you still have issues with the long mode, you could try to
> > hack gnumach to wait at some point (e.g. user_bootstrap() or
> > setup_main()), attach with gdb and then continue. Eit
Il 21/03/23 10:11, Sergey Bugaev ha scritto:
Can you attach with gdb at this point? IIRC you can also dynamically
enable/disable the gdb server through the qemu monitor, or stop and see
the registers from there.
Sure:
(gdb) target rem :1234
Remote debugging using :1234
warning: Remote gdbserve
On Tue, Mar 21, 2023 at 11:36 AM Luca wrote:
>
> Il 20/03/23 20:10, Sergey Bugaev ha scritto:
> > I've gone through the process again (without GDB, even, for now).
> > Attaching two screenshots: the first one shows what I input to GRUB
> > (seemingly all correct?), on the second one Mach boots, pr
Il 20/03/23 20:10, Sergey Bugaev ha scritto:
I've gone through the process again (without GDB, even, for now).
Attaching two screenshots: the first one shows what I input to GRUB
(seemingly all correct?), on the second one Mach boots, prints "1
bootstrap modules" and... just sits there doing noth
Il 21/03/23 04:58, Flávio Cruz ha scritto:
Il 20/03/23 05:59, Flavio Cruz ha scritto:
> diff --git a/i386/i386/thread.h b/i386/i386/thread.h
> index cb317bee..c5da7522 100644
> --- a/i386/i386/thread.h
> +++ b/i386/i386/thread.h
> @@ -225,6 +225,17 @@ typedef struct p
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