lkml.org 
[lkml]   [2008]   [May]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/2] Use structs instead of hardcoded offsets in x86 boot decompressor.
Rik van Riel wrote:
> On Fri, 23 May 2008 23:17:01 -0700
> "H. Peter Anvin" <hpa@zytor.com> wrote:
>
>> Uhm... except it doesn't live at address zero, at all.
>>
>> It's called "zeropage" because we used to recycle it into
>> empty_zero_page, a long long time ago.
>>
>> The bootparms structure is pointed to by %esi being passed from the
>> setup code to the decompressor to the kernel.
>
> Then why does dereferencing the uninitialized
> pointer work, both in the code before and after
> the patch?
>
> What am I misssing?

Heck if I know. It definitely *shouldn't* work...

-hpa


\
 
 \ /
  Last update: 2008-05-25 06:09    [W:0.619 / U:0.196 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site