Re: [GIT PULL] x86 setup: correct booting on 486 (revised)

"H. Peter Anvin" <[email protected]> writes:

> Jeremy Fitzhardinge wrote:
>> H. Peter Anvin wrote:
>>> The ELF note format is sane enough, although it looks like it's not
>>> self-terminating, so we'd either need an offset and a length field, or
>>> adopt the convention that namesz = descsz = type = 0 terminates the
>>> block (I prefer the latter, myself.)
>>
>> Hm, I think offset+length would be better: it's how they're represented
>> in a normal ELF file, so you can just extract the length if you're
>> extracting the notes.  Also, generating a terminating note with the
>> current linker-based notes machinery would be a bit of a pain.
>
> .notes : {
> 	*(.note.*)
> 	. = ALIGN(4);
> 	LONG(0);
> 	LONG(0);
> 	LONG(0);
> }
>
> Am I missing something?

I don't think adding a length any harder.

The all zero note is reserved so using it this way should be ok.
Regardless this sounds like a sane thing to be looking at.

Eric
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• References:
  • [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: "H. Peter Anvin" <[email protected]>
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: Linus Torvalds <[email protected]>
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: "H. Peter Anvin" <[email protected]>
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: Linus Torvalds <[email protected]>
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: "H. Peter Anvin" <[email protected]>
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: Linus Torvalds <[email protected]>
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: [email protected] (Eric W. Biederman)
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: "H. Peter Anvin" <[email protected]>
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: Jeremy Fitzhardinge <[email protected]>
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: "H. Peter Anvin" <[email protected]>
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: Jeremy Fitzhardinge <[email protected]>
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: "H. Peter Anvin" <[email protected]>
  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
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  • Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
    • From: "H. Peter Anvin" <[email protected]>
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