[Bug 38780] AArch64 platforms: register X18 (TEB) must remain reserved for Wine to run 64-bit ARM Windows applications ( Distro aarch64 toolchains need '-ffixed-x18' default, loader/libc/userland )

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=38780

--- Comment #20 from Zebediah Figura <z.figura12 at gmail.com> ---
(In reply to Martin Storsjö from comment #19)
> Currently I'm running with this patch:
> https://source.winehq.org/patches/data/137759
> 
> This pretty much gets the same effect as the suggested compiler handling for
> prologues/epilogues, but without compiler support - but it doesn't fix
> callbacks either. This (together with
> https://source.winehq.org/patches/data/135165) has been a good enough
> workaround for me so far though.

Sure, I'd just like to see this fixed in a generic way.

Is there any obvious infeasibility about my proposal #2? It's weird, but seems
plausible, and maybe wouldn't even be that hard, if we can leverage the same
sort of code that -fcall-used-reg uses [disclaimer: I am not a compiler
enthusiast yet, either]. Plus it means we can use inline TEB access in Wine
code :-)

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