Author: kib
Date: Sun Nov 10 09:14:22 2019
New Revision: 354587
URL: https://svnweb.freebsd.org/changeset/base/354587
Log:
MFC r354281:
amd64: Store %cr3 into pcpu saved_ucr3 on double fault.
Modified:
stable/12/sys/amd64/amd64/exception.S
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/amd64/amd64/exception.S
==============================================================================
--- stable/12/sys/amd64/amd64/exception.S Sun Nov 10 09:13:12 2019
(r354586)
+++ stable/12/sys/amd64/amd64/exception.S Sun Nov 10 09:14:22 2019
(r354587)
@@ -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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