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Date: Wed, 11 Mar 2015 14:39:17 +0100
From: Szabolcs Nagy <>
Subject: Re: aarch64 port

* Rich Felker <> [2015-03-09 23:03:42 -0400]:
> On Tue, Mar 10, 2015 at 03:44:46AM +0100, Szabolcs Nagy wrote:
> > vdso works now
> Great! Can you confirm whether enabling it on 32-bit ARM would be okay

32 arm support vdso is not yet merged into the kernel

> > > Yes, I'd like to add a copy (or just move it) at the end contingent
> > > upon TLS_ABOVE_TP.
> > 
> > i just added a todo about this
> Would you like me to make this change prior to committing aarch64 so
> you could use the assumption that dtv is accessible at a fixed small
> offset?

i made a patch that does the copy

> > i can add dummy long double functions that map to the double version
> > 
> > missing ones (not counting complex):
> Are the complex ones ld-format-specific anyway? I figured they would
> just be written in terms of real ld functions.

you were right
so i added dummy versions for the few missing math functions

> > i changed the pthread types to match x86_64 as that seems to me
> > the most reasonable approach
> Yes that's the way I'm leaning -- 40-byte rather than 32-byte. Having
> the pthread types in the shared part of would be very
> nice.

doing that would be a separate commit
(currently there are 3 versions: 32bit, 64bit, x32)

attached all the patches, when they are applied aarch64 passes the tests

View attachment "0001-copy-the-dtv-pointer-to-the-end-of-the-pthread-struc.patch" of type "text/x-diff" (2802 bytes)

View attachment "0002-math-add-ld128-exp2l-based-on-the-freebsd-implementa.patch" of type "text/x-diff" (11828 bytes)

View attachment "0003-math-add-dummy-implementations-of-128-bit-long-doubl.patch" of type "text/x-diff" (8498 bytes)

View attachment "0004-add-aarch64-port.patch" of type "text/x-diff" (70699 bytes)

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