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authorPaul Bolle <pebolle@tiscali.nl>2010-06-04 14:14:49 +0200
committerH. Peter Anvin <hpa@linux.intel.com>2010-06-07 14:53:00 -0700
commita3bc7cc0cd20a133a6f11537eb51b0dc252fefc0 (patch)
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parent4d66117c87409691ddf1501c17d1642040414a7c (diff)
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chain.c32: add support for loading GRUB stage2
This adds (basic) support for GRUB stage2 image files. Loading a stage2 image will probably give you a GRUB prompt, with GRUB's "root" set at "(hd0)" (ie, entire first disk). Maybe the "root" will differ in less common setups. (One can of course select another disk and/or partition with GRUB's "root" command.) This has only been tested with version 3.2 stage2 images (as used by GRUB 0.97). I'm not familiair with differences with other versions. GRUB's loading mechanism allows to somehow provide stage2 with the selected disk and partition, BSD slice, etc. (ie, to tell stage2 what it's "root" is). I don't yet understand the notation used in that mechanism. Besides, since stage2 images will not necessarily be loaded from the disk (and partition, etc.) they were installed to, it seems best to just use the first disk. GRUB stage1_5 image files load quite similarly. However, for some reason, a short test only got those images to print an error ("Error 17"). This could be related to the partition info these images are provided with when they're loaded. I have never used stage1_5 images, and do not know how to properly use and configure those, so my test stopped there, and stage1_5 images are not supported. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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