Re: PANIC: FAIL in line 187

objdump -s -j .kip amd64-kernel | grep 0a0
 ffffffffc02130a0 00000000 00000000 00000000 00000000  ................

2006/9/1, Uwe Dannowski <[email protected]>:
>
> Max Dilay wrote:
> > But when Pistachio loading they write PANIC: Fail in line 187.
>
> Short answer: Try GCC < 4.1 if you can. Version 4.0.x should work.
>               I don't have a quick fix for this.
>
> Long answer:
>
> There seems to be a problem with how GCC 4.1 handles the initialization
> of the KIP. I encountered it on IA-32 but didn't have time to take care
> of it, yet. Prior versions of GCC managed to statically initialize the
> memoryinfo field in the KIP which serves as a pointer to the memory
> descriptors. GCC 4.1, however, generates code to initialize it. Thus the
> field contains zeros in the freshly loaded kernel binary that is
> inspected and patched by kickstart. The constructor to initialize the
> meminfo field would only be called once the kernel has been launched if
> it ever got that far. Around 3 or 4 corners, this then manifests in
> kickstart in said "FAIL in line 187".
>
> I'm not sure if that transfers to AMD64, though. I guess it does. You
> can check by inspecting the values at offset 0xA8 ... 0xAF in the KIP
> in your amd64-kernel binary:
>
>   objdump -s -j .kip amd64-kernel | grep 0a0
>
> should yield something like:
>
>   ffffffffc023e0a0 00000000 00000000 d0000000 00030000
>
> where the last two words shouldn't be all zeros.
>
>
> Uwe
>
>
>