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arm: set alignment properly for asm funcs

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ARM requires a 4-byte alignment on all ARM code (though this
requirement is relaxed to 2-byte for some THUMB code) and we
should be explicit about that here.

GAS has its own fix for this[1] that forces proper alignment
on any section containing assembled instructions, but this is
not universal: Clang's and other gaslike assemblers lack this
implicit alignment. Whether or not this is considered a bug in
those assemblers, it is better to ask directly for what we want.

[1]: https://sourceware.org/bugzilla/show_bug.cgi?id=12931

Signed-off-by: Sam Edwards <CFSworks@gmail.com>
This commit is contained in:
Sam Edwards 2023-05-12 16:31:05 -06:00 • committed by Tom Rini
parent d20481ee3c
commit 719120392f
1 changed files with 2 additions and 2 deletions
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4
arch/arm/include/asm/linkage.h
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@ -1,7 +1,7 @@
#ifndef __ASM_LINKAGE_H
#define __ASM_LINKAGE_H
#define __ALIGN .align 0
#define __ALIGN_STR ".align 0"
#define __ALIGN .p2align 2
#define __ALIGN_STR ".p2align 2"
#endif