musl - Re: Linux powerpc new system call instruction and ABI

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Message-ID: <87k0nr6ezw.fsf@oldenburg.str.redhat.com>
Date: Fri, 21 May 2021 21:52:51 +0200
From: Florian Weimer <fweimer@...hat.com>
To: Matheus Castanho via Libc-alpha <libc-alpha@...rceware.org>
Cc: Nicholas Piggin <npiggin@...il.com>,  Matheus Castanho
 <msc@...ux.ibm.com>,  musl@...ts.openwall.com,  "Dmitry V. Levin"
 <ldv@...linux.org>,  linux-api@...r.kernel.org,  libc-dev@...ts.llvm.org,
  linuxppc-dev@...ts.ozlabs.org
Subject: Re: Linux powerpc new system call instruction and ABI

* Matheus Castanho via Libc-alpha:

> From: Nicholas Piggin <npiggin@...il.com>
> Subject: [PATCH 1/1] powerpc: Fix handling of scv return error codes
>
> When using scv on templated ASM syscalls, current code interprets any
> negative return value as error, but the only valid error codes are in
> the range -4095..-1 according to the ABI.
>
> Reviewed-by: Matheus Castanho <msc@...ux.ibm.com>

Please reference bug 27892 in the commit message.  I'd also appreciate a
backport to the 2.33 release branch (where you need to add NEWS manually
to add the bug reference).

Thanks,
Florian

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