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Correct TSS segment.

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TSS segment should use (SIZE - 1) as limit, and do not set G bit (highest bit of LimitHigh) because limit means byte count.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: "Yao, Jiewen" <jiewen.yao@intel.com>
Reviewed-by: "Fan, Jeff" <jeff.fan@intel.com>
Reviewed-by: "Kinney, Michael D" <michael.d.kinney@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18935 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Yao, Jiewen
2015-11-25 04:01:00 +00:00
committed by jyao1
parent c7981a1184
commit 20ab326972
4 changed files with 12 additions and 12 deletions
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8
UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmiException.asm
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@@ -85,18 +85,18 @@ CodeSeg64 LABEL QWORD
GDT_SIZE = $ - offset NullSeg
TssSeg LABEL QWORD
DW TSS_DESC_SIZE ; LimitLow
DW TSS_DESC_SIZE - 1 ; LimitLow
DW 0 ; BaseLow
DB 0 ; BaseMid
DB 89h
DB 080h ; LimitHigh
DB 00h ; LimitHigh
DB 0 ; BaseHigh
ExceptionTssSeg LABEL QWORD
DW TSS_DESC_SIZE ; LimitLow
DW TSS_DESC_SIZE - 1 ; LimitLow
DW 0 ; BaseLow
DB 0 ; BaseMid
DB 89h
DB 080h ; LimitHigh
DB 00h ; LimitHigh
DB 0 ; BaseHigh
CODE_SEL = offset CodeSeg32 - offset NullSeg