Re: [PATCH 12/12] i386 boot: Add an ELF header to bzImage

[H. Peter Anvin]

Vivek Goyal wrote:
> On Wed, Oct 04, 2006 at 01:52:58PM -0700, H. Peter Anvin wrote:
> > Vivek Goyal wrote:
> > > memsz will contain the memory required to load the kernel image. And
> > > probably should also include the memory used by kernel in initial boot
> > > up code which is unaccounted and unbounded.
> > Right, so that's a major project to produce.
>
> Eric is already doing that in his patch. He goes through vmlinux
> headers to determine the memory to load the various segments and then
> also takes into account the memory required by bootmem bitmap (128K)
> and memory consumed by initial page tables (tools/build.c).  We can
> audit the code more closely for anything missed and can also include
> some buffer amount to be safe. 
>
> The only flip side would be that if down the line somebody changes
> the initial bootup code, he shall have to also acccount it in
> tools/build.c. Having said that, its not frequent that initial bootup
> code changes.

No, but it's going to be extremely hard to get this straight unless this 
is actually enforced.  I suspect there needs to be a check and a message 
if this is violated.

	-hpa
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