Author: kib
Date: Sat Nov 16 11:00:22 2019
New Revision: 354769
URL: https://svnweb.freebsd.org/changeset/base/354769
Log:
MFC r354696:
amd64: only set PCB_FULL_IRET pcb flag when #gp or similar exception comes
from usermode.
Modified:
stable/11/sys/amd64/amd64/exception.S
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/amd64/amd64/exception.S
==============================================================================
--- stable/11/sys/amd64/amd64/exception.S Sat Nov 16 10:50:10 2019
(r354768)
+++ stable/11/sys/amd64/amd64/exception.S Sat Nov 16 11:00:22 2019
(r354769)
@@ -492,8 +492,8 @@ prot_addrf:
3: cmpw $KUG32SEL,TF_GS(%rsp)
jne 4f
movq %rdx,PCB_GSBASE(%rdi)
+ orl $PCB_FULL_IRET,PCB_FLAGS(%rdi) /* full iret from user #gp */
4: call handle_ibrs_entry
- orl $PCB_FULL_IRET,PCB_FLAGS(%rdi) /* always full iret from GPF */
movw %es,TF_ES(%rsp)
movw %ds,TF_DS(%rsp)
testl $PSL_I,TF_RFLAGS(%rsp)
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