[edk2-devel] [PATCH] IntelFsp2Pkg: Fix FSP binary rebasing issue for PE32+ image

[Zeng, Star]

Reviewed-by: Star Zeng <star.zeng at intel.com>

-----Original Message-----
From: Maurice Ma <maurice.ma at intel.com> 
Sent: Thursday, November 12, 2020 8:11 AM
To: devel at edk2.groups.io
Cc: Ma, Maurice <maurice.ma at intel.com>; Chiu, Chasel <chasel.chiu at intel.com>; Desimone, Nathaniel L <nathaniel.l.desimone at intel.com>; Zeng, Star <star.zeng at intel.com>
Subject: [PATCH] IntelFsp2Pkg: Fix FSP binary rebasing issue for PE32+ image

Current FSP rebasing script SplitFspBin.py has support for both
PE32 and PE32+ image formats. However, while updating the ImageBase field in the image header, it always assumed the ImageBase field is 32bit long. Since PE32+ image format defined ImageBase as 64bit, the current script will only update the lower 32bit value and leave the upper 32bit untouched. It does not work well for PE32+ image that requires update in the upper 32bit ImageBase field. The expected behavior is to update the full 64bit field. This patch implemented this fix.

Signed-off-by: Maurice Ma <maurice.ma at intel.com>

Cc: Chasel Chiu <chasel.chiu at intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone at intel.com>
Cc: Star Zeng <star.zeng at intel.com>
---
 IntelFsp2Pkg/Tools/SplitFspBin.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/IntelFsp2Pkg/Tools/SplitFspBin.py b/IntelFsp2Pkg/Tools/SplitFspBin.py
index 3c0d5af1b6..24272e82af 100644
--- a/IntelFsp2Pkg/Tools/SplitFspBin.py
+++ b/IntelFsp2Pkg/Tools/SplitFspBin.py
@@ -677,8 +677,12 @@ class PeTeImage:
         else:

             offset  = self.Offset + self.DosHdr.e_lfanew

             offset += EFI_IMAGE_NT_HEADERS32.OptionalHeader.offset

-            offset += EFI_IMAGE_OPTIONAL_HEADER32.ImageBase.offset

-            size    = EFI_IMAGE_OPTIONAL_HEADER32.ImageBase.size

+            if self.PeHdr.OptionalHeader.PePlusOptHdr.Magic == 0x20b: # 
+ PE32+ image

+                offset += 
+ EFI_IMAGE_OPTIONAL_HEADER32_PLUS.ImageBase.offset

+                size    = EFI_IMAGE_OPTIONAL_HEADER32_PLUS.ImageBase.size

+            else:

+                offset += EFI_IMAGE_OPTIONAL_HEADER32.ImageBase.offset

+                size    = EFI_IMAGE_OPTIONAL_HEADER32.ImageBase.size

 

         value  = Bytes2Val(fdbin[offset:offset+size]) + delta

         fdbin[offset:offset+size] = Val2Bytes(value, size)

--
2.29.2.windows.1



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