Re: [PATCH] tools/nolibc: x86: Remove `r8`, `r9` and `r10` from the clobber list
From: Borislav Petkov
Date: Tue Oct 12 2021 - 16:30:01 EST
On Tue, Oct 12, 2021 at 11:06:38AM +0200, Willy Tarreau wrote:
> Let's indeed wait for any of the x86 maintainers to confirm your
> analysis.
I guess the official doc you guys are looking for is the x86-64 ABI:
https://gitlab.com/x86-psABIs/x86-64-ABI/
and recent pdfs are here:
https://gitlab.com/x86-psABIs/x86-64-ABI/-/wikis/x86-64-psABI
and there you scroll to
"A.2 AMD64 Linux Kernel Conventions
...
A.2.1 Calling Conventions"
and that section explains which regs go where.
HTH.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette