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identity=mailfrom; envelope-from="cinap_lenrek@felloff.net"; helo=duke.felloff.net; client-ip=216.126.196.34 Received: from duke.felloff.net (duke.felloff.net [216.126.196.34]) by tb-mx1.topicbox.com (Postfix) with ESMTP for <9fans@9fans.net>; Mon, 29 Mar 2021 11:19:49 -0400 (EDT) (envelope-from cinap_lenrek@felloff.net) Message-ID: <88847EB155A2F4AA455C0C26D22E84B7@felloff.net> Date: Mon, 29 Mar 2021 17:19:39 +0200 From: cinap_lenrek@felloff.net To: 9fans@9fans.net Subject: Re: [9fans] NFS suicide on RPi3 and RPi4 9front, but works on RMiller's Plan9. In-Reply-To: <761985F3-8139-4F5D-AFEC-0A7D5F808245@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Topicbox-Policy-Reasoning: allow: sender is a member Topicbox-Message-UUID: 376aefee-90a2-11eb-90ee-b83f116d69bd Archived-At: =?UTF-8?B?PGh0dHBzOi8vOWZhbnMudG9waWNib3guY29tL2dyb3Vwcy85?= =?UTF-8?B?ZmFucy9UOTk1ZWMyMjMwZDE2YmQwYi1NN2E2NDhkYjExN2RkOWIzYjY1ZTI2?= =?UTF-8?B?YjliPg==?= List-Help: List-Id: "9fans" <9fans.9fans.net> List-Post: List-Software: Topicbox v0 List-Subscribe: Precedence: list Reply-To: 9fans <9fans@9fans.net> List-Unsubscribe: , Topicbox-Delivery-ID: 2:9fans:437d30aa-c441-11e9-8a57-d036212d11b0:522be890-2105-11eb-b15e-8d699134e1fa:M7a648db117dd9b3b65e26b9b:1:du4TL-HaF5xplAVOcumN6H70sYBywhOqFe3__UwxVb4 >=20 > Anyawys, the faulting address is >=20 > addr=3D0x100061fa0 pc=3D37930 sorry to reply here as i never got the original mail. i could reproduce this and it turns out to be a arm64 compiler bug expanding the -1 offset in the array index to a 32 bit unsigned constant but instruct= ion issued is a 64 bit addition. i commited a work around for libsunrpc avoiding this case. changeset: 8382:fbff57e70e76 tag: tip user: cinap_lenrek@felloff.net date: Mon Mar 29 17:13:50 2021 +0200 summary: libsunrpc: work around arm64 compiler bug in sunStringUnpack() diff -r 87d8e72ffb5c -r fbff57e70e76 sys/src/libsunrpc/rpc.c --- a/sys/src/libsunrpc/rpc.c Tue Mar 23 16:33:32 2021 -0700 +++ b/sys/src/libsunrpc/rpc.c Mon Mar 29 17:13:50 2021 +0200 @@ -428,8 +428,9 @@ goto Err; /* slide string down over length to make room for NUL */ memmove(dat-1, dat, n); - dat[-1+n] =3D 0; - *s =3D (char*)(dat-1); + dat--; + dat[n] =3D 0; + *s =3D (char*)dat; return 0; Err: return -1; -- cinap ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/T995ec2230d16bd0b-M7a648= db117dd9b3b65e26b9b Delivery options: https://9fans.topicbox.com/groups/9fans/subscription