[OpenBIOS] [PATCH 3/10] Don't stop at APPLE_VOID partition

William Hahne will07c5 at gmail.com
Wed Aug 10 17:28:34 CEST 2011


On Wed, Aug 10, 2011 at 5:50 AM, Mark Cave-Ayland <
mark.cave-ayland at siriusit.co.uk> wrote:

> On 09/08/11 22:54, William Hahne wrote:
>
>  The void partitions can be occasionally found on Mac OS discs (10.2 for
>> example.) Previously mac-parts would just stop at the first void
>> partition meaning it would never try to boot from the HFS partition.
>>
>> Index: packages/mac-parts.c
>> ==============================**==============================**=======
>> --- packages/mac-parts.c (revision 1041)
>> +++ packages/mac-parts.c (working copy)
>> @@ -165,9 +165,12 @@
>> for (parnum = 1; parnum <= __be32_to_cpu(par.pmMapBlkCnt)**; parnum++) {
>> SEEK( bs * parnum );
>> READ( &par, sizeof(par) );
>> - if( __be16_to_cpu(par.pmSig) != DESC_PART_SIGNATURE ||
>> -                            !__be32_to_cpu(par.**pmPartBlkCnt) )
>> + if( __be16_to_cpu(par.pmSig) != DESC_PART_SIGNATURE) {
>> break;
>> + }
>> + if ( !__be32_to_cpu(par.**pmPartBlkCnt) ) {
>> + continue; /* Just a void partition, ignore it. */
>> + }
>> DPRINTF("found partition type: %s with status %x\n", par.pmPartType,
>> __be32_to_cpu(par.**pmPartStatus));
>>
>
> Same as my comment for patch 2/10.
>
>
This was also found through testing although I would assume it is
documented. If you have a 10.2 disc (or I would assume most other early Mac
OS X discs) lying around you can look at the partition table and see the
void partitions.

William Hahne


>
> ATB,
>
> Mark.
>
> --
> Mark Cave-Ayland - Senior Technical Architect
> PostgreSQL - PostGIS
> Sirius Corporation plc - control through freedom
> http://www.siriusit.co.uk
> t: +44 870 608 0063
>
> Sirius Labs: http://www.siriusit.co.uk/labs
>
> --
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