Date: Tue, 25 May 2021 21:57:10 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: Konstantin Belousov <kib@FreeBSD.org>, markj@freebsd.org Cc: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: Re: git: 91aae953cb80 - main - amd64: clear PSL.AC in the right frame Message-ID: <alpine.BSF.2.00.2105252155150.4751@ai.fobar.qr> In-Reply-To: <202105251520.14PFKpiA009553@gitrepo.freebsd.org> References: <202105251520.14PFKpiA009553@gitrepo.freebsd.org>
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On Tue, 25 May 2021, Konstantin Belousov wrote: > The branch main has been updated by kib: > > URL: https://cgit.FreeBSD.org/src/commit/?id=91aae953cb807d6fb7a70782b323bf9beb60d7c9 > > commit 91aae953cb807d6fb7a70782b323bf9beb60d7c9 > Author: Konstantin Belousov <kib@FreeBSD.org> > AuthorDate: 2021-05-22 19:48:36 +0000 > Commit: Konstantin Belousov <kib@FreeBSD.org> > CommitDate: 2021-05-25 15:20:46 +0000 > > amd64: clear PSL.AC in the right frame > > If copyin family of routines fault, kernel does clear PSL.AC on the > fault entry, but the AC flag of the faulted frame is kept intact. Since > onfault handler is effectively jump, AC survives until syscall exit. > > Reported by: m00nbsd, via Sony > Reviewed by: markj > Sponsored by: The FreeBSD Foundation > admbugs: 975 I am getting this when trying to build LINT kernels on head/amd64: linking kernel ld: error: undefined symbol: CPUID_STDEXT_SMAP >>> referenced by linux32_support.o:(.text+0x6) and also people report that linux*.ko are no longer loading for similar reasons (as follow-up to my d72cd275187c6399caf0ca4125292dc7e55fa478 Bump __FreeBSD_version to 1400015 ..; see there). Can you please have a look? /bz -- Bjoern A. Zeeb r15:7
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