[PATCH] D24471: [ELF] Set EF_ARM_EABI_VER5 for ARM

Mon Sep 12 23:32:41 PDT 2016

mstorsjo added a comment.

In https://reviews.llvm.org/D24471#540754, @mstorsjo wrote:

> In https://reviews.llvm.org/D24471#540599, @emaste wrote:
>
> > > Without this flag set, an aarch64 kernel won't try to load the executable
> >
> >
> > Do you mean this is part of some ABI spec and so any aarch64 kernel should not load the executable, or that this is due to an implementation detail of (presumably) the Linux kernel?
>
>
> I think it's just an implementation detail. Since GNU ld has been setting it since forever (I assume), I guess the aarch64 kernel just hasn't bothered to add support for "legacy" binaries, only the ones commonly available.

http://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/arch/arm64/include/asm/elf.h?h=v4.4.9&id=1a1a512b983108015ced1e7a7c7775cfeec42d8c#n176

So it seems like it doesn't matter much which EABI version is set, as long as any flag within EF_ARM_EABI_MASK is set.

https://reviews.llvm.org/D24471