tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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>
This commit is contained in:
Yarlagadda, Satya P 2016-08-01 19:41:34 +08:00 committed by Jiewen Yao
parent d54e2d6c1e
commit 8265373e60
1 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm
View File

@ -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