diff options
| author | Yao, Jiewen <jiewen.yao@intel.com> | 2015-11-25 04:01:00 +0000 |
|---|---|---|
| committer | jyao1 <jyao1@Edk2> | 2015-11-25 04:01:00 +0000 |
| commit | 20ab326972339d16d7e95d94f9d7710cae1ae75f (patch) | |
| tree | ad65cc087e312329dd7daf55aea521905d3f2689 /UefiCpuPkg/PiSmmCpuDxeSmm/X64 | |
| parent | c7981a11840714975a7dc029366931ddec64b2a6 (diff) | |
| download | edk2-platforms-20ab326972339d16d7e95d94f9d7710cae1ae75f.tar.xz | |
Correct TSS segment.
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
Diffstat (limited to 'UefiCpuPkg/PiSmmCpuDxeSmm/X64')
| -rw-r--r-- | UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiException.S | 4 | ||||
| -rw-r--r-- | UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiException.asm | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiException.S b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiException.S index 6dbcaa5b67..2ae6f2c32f 100644 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiException.S +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiException.S @@ -79,11 +79,11 @@ CodeSeg64: .byte 0 # BaseHigh
# TSS Segment for X64 specially
TssSeg:
- .word TSS_DESC_SIZE # LimitLow
+ .word TSS_DESC_SIZE - 1 # LimitLow
.word 0 # BaseLow
.byte 0 # BaseMid
.byte 0x89
- .byte 0xDB # LimitHigh
+ .byte 0x00 # LimitHigh
.byte 0 # BaseHigh
.long 0 # BaseUpper
.long 0 # Reserved
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiException.asm b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiException.asm index 3d841c6546..ab716450b7 100644 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiException.asm +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiException.asm @@ -78,11 +78,11 @@ CodeSeg64 LABEL QWORD DB 0 ; BaseHigh
; TSS Segment for X64 specially
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
DD 0 ; BaseUpper
DD 0 ; Reserved
|