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SubjectRe: [PATCH 08/11] kexec-bzImage: Support for loading bzImage using 64bit entry
On 03/05/2014 08:37 AM, Borislav Petkov wrote:
>> If the "HdrS" (0x53726448) magic number is not found at offset 0x202,
>> the boot protocol version is "old". Loading an old kernel, the
>> following parameters should be assumed:
>> Image type = zImage
>> initrd not supported
>> Real-mode kernel must be located at 0x90000.
>> So if it is old version then it is zImage (and not bzImage). So pr_debug()
>> message seems to be correct that image one is trying to load is not
>> bzImage and this loader will not handle this image.
> Ok, old == zImage, got it.

No, old ⊂ zImage, but you can have a zImage with a newer protocol
version, too. There are no load flags in the old protocol.

These days the old protocol is interesting mostly because of non-Linux
images using the same boot protocol.


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