On 11-Nov-00 Matthew Jacob wrote:
>
>
>> Savecore isn't working in -current, dying in my case with "read:
>> invalid argument". (This is on an Alpha -- I don't have an i386
>> -current machine to test it on at the moment.) I traced it down to
>> the fact that getbootfile() is returning "kernel" -- not the full
>> pathname as the man page promises. This seems to be because the
>> "kern.bootfile" sysctl variable isn't getting set correctly:
>>
>> alpha# sysctl kern.bootfile
>> kern.bootfile: kernel
>>
>> Because I had an old "/kernel" file and savecore runs in "/", it was
>> finding the wrong kernel.
>>
>> This seems to be some sort of coordination problem between the loader
>> and the kernel and, maybe, the Alpha SRM. Can anybody shed some light
>
> Not SRM. SRM cares not.
>
>
>> on it?
>>
>> Also, in "src/sys/boot/common/boot.c" we still have this:
>>
>> static const char *default_bootfiles = "kernel.ko";
>>
>> which isn't right any more.
>
>
> Absolutely wrong, yes.
>
> Look at kern_mib.c:
>
>
> char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */
>
> SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW,
> kernelname, sizeof kernelname, "Name of kernel file booted");
>
>
> This is also wrong now.
>
> It's somewhat problematic in that the actual kernel name is kernel, still,
> but
> the path that it is found in depends on where the loader actually found it-
> that's contingent on module_path.
>
> I don't know whether the loader is supposed to modify kernelname in the
> loaded
> kernel to have the actual path or not.
It is supposed to. Looks like a bug in the alpha startup code somewhere:
> uname -a
FreeBSD laptop.baldwin.cx 5.0-CURRENT FreeBSD 5.0-CURRENT #40: Fri Nov 10
15:17:48 PST 2000 [EMAIL PROTECTED]:/usr/src/sys/compile/LAPTOP-card
i386
> sysctl kern.bootfile
kern.bootfile: /boot/kernel.card/kernel
> uname -a
FreeBSD baz.osd.bsdi.com 5.0-CURRENT FreeBSD 5.0-CURRENT #48: Fri Nov 3
12:37:16 PST 2000 [EMAIL PROTECTED]:/usr/src/sys/compile/BAZ alpha
> sysctl kern.bootfile
kern.bootfile: kernel
> -matt
--
John Baldwin <[EMAIL PROTECTED]> -- http://www.FreeBSD.org/~jhb/
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