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Message-ID: <20191021180956.GQ7832@port70.net>
Date: Mon, 21 Oct 2019 20:09:56 +0200
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: Re: another armv7-m exception handling problem
* Patrick Oppenlander <patrick.oppenlander@...il.com> [2019-10-21 15:43:40 +1100]:
> Not sure if this is a musl, gcc or ld bug.
>
> Running gcc-8.3.0 musl 1.1.24 static pie.
providing binutils version number is useful if there is
a chance that it's an ld bug.
this seems to be
https://sourceware.org/bugzilla/show_bug.cgi?id=22269
which was supposed to be fixed by
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=95b03e4ad68e7a90f5096b47df595636344b783a
but apperently there are still missing cases.
(it does not help that the ld test for this bug
greps for R_*_NONE dynrelocs but not R_*_RELATIVE
which i is just as bad for undef weak syms in pie)
i added a note to the bug.
if you add __attribute__((visibility("hidden")))
to the example given by Rich then it works, the
bug only affects static pie linking.
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