[PATCH] loader: Add support for ARM linux in the preloader

[Martin Storsjö]

On Mon, 2 Aug 2021, Martin Storsjo wrote:

> As the preloader is linked with -nodefaultlibs, we need to provide
> builtin helpers for division on arm (that normally are provided by
> libgcc or compiler-rt). The bundled version is taken from the LLVM
> 8.0.0 release, which still was dual licensed under the MIT and
> University of Illinois licenses. (In the 9.0.0 release, all of LLVM
> was relicensed to a different license.)
>
> Since 28fe84da45bea7de56539b50eac8ebcec54342de, the main exe image
> must be mappable at its desired base address, which essentially
> requires the preloader.
>
> This fixes the original issue that lead to
> https://bugs.winehq.org/show_bug.cgi?id=51539.
>
> Signed-off-by: Martin Storsjo <martin at martin.st>
> ---

I ran into some issues with this patch on some other system, so don't 
apply it quite yet if it otherwise would have seemed ok, pending some more 
debugging.

// Martin