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| author | Yarlagadda, Satya P <satya.p.yarlagadda@intel.com> | 2016-08-01 19:41:34 +0800 |
|---|---|---|
| committer | Jiewen Yao <jiewen.yao@intel.com> | 2016-08-02 21:12:54 +0800 |
| commit | 8265373e60ad79acd4a20affe2c49470c68d6a9c (patch) | |
| tree | 972e3b0318e0b9085bafaa57f3553f0014dce4d0 /IntelFsp2Pkg | |
| parent | d54e2d6c1e68f2edfa06a6a331e808f109df779f (diff) | |
| download | edk2-8265373e60ad79acd4a20affe2c49470c68d6a9c.tar.gz edk2-8265373e60ad79acd4a20affe2c49470c68d6a9c.tar.bz2 edk2-8265373e60ad79acd4a20affe2c49470c68d6a9c.zip | |
IntelFsp2Pkg: Locate FSP Info Header dynamically
we need to locate the FSP Info Header by calculating offset dynamically to
handle the scenario of FSP component is being rebased to different location.
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Satya Yarlagadda <satya.p.yarlagadda@intel.com>
Reviewed-by: Maurice Ma <maurice.ma@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Diffstat (limited to 'IntelFsp2Pkg')
| -rw-r--r-- | IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm b/IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm index 00e953b4f1..43eac973a2 100644 --- a/IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm +++ b/IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm @@ -14,22 +14,21 @@ SECTION .text
global ASM_PFX(FspInfoHeaderRelativeOff)
-ASM_PFX(FspInfoHeaderRelativeOff):
- ;
- ; This value will be pached by the build script
- ;
- DD 0x12345678
global ASM_PFX(AsmGetFspBaseAddress)
ASM_PFX(AsmGetFspBaseAddress):
- mov eax, ASM_PFX(AsmGetFspInfoHeader)
- sub eax, dword [ASM_PFX(FspInfoHeaderRelativeOff)]
+ call ASM_PFX(AsmGetFspInfoHeader)
add eax, 0x1C
mov eax, dword [eax]
ret
global ASM_PFX(AsmGetFspInfoHeader)
ASM_PFX(AsmGetFspInfoHeader):
- mov eax, ASM_PFX(AsmGetFspInfoHeader)
- sub eax, dword [ASM_PFX(FspInfoHeaderRelativeOff)]
+ call ASM_PFX(NextInstruction)
+ASM_PFX(NextInstruction):
+ pop eax
+ sub eax, ASM_PFX(NextInstruction)
+ add eax, ASM_PFX(AsmGetFspInfoHeader)
+ DB 02Dh ; opcode of sub eax, imm32
+ASM_PFX(FspInfoHeaderRelativeOff): DD 0x12345678 ; sub eax, FspInfoHeaderRelativeOff
ret
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