Date: Sun, 3 Nov 2019 11:52:51 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r354281 - head/sys/amd64/amd64 Message-ID: <201911031152.xA3Bqpxd026635@repo.freebsd.org>
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Author: kib Date: Sun Nov 3 11:52:50 2019 New Revision: 354281 URL: https://svnweb.freebsd.org/changeset/base/354281 Log: amd64: Store %cr3 into pcpu saved_ucr3 on double fault. Tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/sys/amd64/amd64/exception.S Modified: head/sys/amd64/amd64/exception.S ============================================================================== --- head/sys/amd64/amd64/exception.S Sun Nov 3 11:51:53 2019 (r354280) +++ head/sys/amd64/amd64/exception.S Sun Nov 3 11:52:50 2019 (r354281) @@ -349,6 +349,8 @@ IDTVEC(dblfault) jz 1f /* already running with kernel GS.base */ swapgs 1: lfence + movq %cr3,%rax + movq %rax,PCPU(SAVED_UCR3) movq PCPU(KCR3),%rax cmpq $~0,%rax je 2f
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