[PATCH v5 29/38] MdePkg/PeCoffLib: Capture DLL characteristics field in image context

["Ard Biesheuvel" <ardb@kernel.org>]

When loading a PE/COFF image, capture the DLL characteristics field of
the header into our image context structure so we can refer to it when
mapping the image.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 MdePkg/Include/Library/PeCoffLib.h        |  4 ++++
 MdePkg/Library/BasePeCoffLib/BasePeCoff.c | 23 +++++++++++---------
 2 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/MdePkg/Include/Library/PeCoffLib.h b/MdePkg/Include/Library/PeCoffLib.h
index df2f7f5e5961..cb48b4a8f85c 100644
--- a/MdePkg/Include/Library/PeCoffLib.h
+++ b/MdePkg/Include/Library/PeCoffLib.h
@@ -171,6 +171,10 @@ typedef struct {
   ///
   UINT16                      ImageType;
   ///
+  /// Set by PeCoffLoaderGetImageInfo() to the DLL flags stored in the PE/COFF header.
+  ///
+  UINT16                      DllCharacteristics;
+  ///
   /// Set by PeCoffLoaderGetImageInfo() to TRUE if the PE/COFF image does not contain
   /// relocation information.
   ///
diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
index 31e1f2035963..fb6847e62a8d 100644
--- a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
+++ b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
@@ -308,10 +308,11 @@ PeCoffLoaderGetPeHeader (
       //
       // Use PE32 offset
       //
-      ImageContext->ImageType        = Hdr.Pe32->OptionalHeader.Subsystem;
-      ImageContext->ImageSize        = (UINT64)Hdr.Pe32->OptionalHeader.SizeOfImage;
-      ImageContext->SectionAlignment = Hdr.Pe32->OptionalHeader.SectionAlignment;
-      ImageContext->SizeOfHeaders    = Hdr.Pe32->OptionalHeader.SizeOfHeaders;
+      ImageContext->ImageType          = Hdr.Pe32->OptionalHeader.Subsystem;
+      ImageContext->ImageSize          = (UINT64)Hdr.Pe32->OptionalHeader.SizeOfImage;
+      ImageContext->SectionAlignment   = Hdr.Pe32->OptionalHeader.SectionAlignment;
+      ImageContext->SizeOfHeaders      = Hdr.Pe32->OptionalHeader.SizeOfHeaders;
+      ImageContext->DllCharacteristics = Hdr.Pe32->OptionalHeader.DllCharacteristics;
     } else if (Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
       //
       // 1. Check FileHeader.NumberOfRvaAndSizes filed.
@@ -429,10 +430,11 @@ PeCoffLoaderGetPeHeader (
       //
       // Use PE32+ offset
       //
-      ImageContext->ImageType        = Hdr.Pe32Plus->OptionalHeader.Subsystem;
-      ImageContext->ImageSize        = (UINT64)Hdr.Pe32Plus->OptionalHeader.SizeOfImage;
-      ImageContext->SectionAlignment = Hdr.Pe32Plus->OptionalHeader.SectionAlignment;
-      ImageContext->SizeOfHeaders    = Hdr.Pe32Plus->OptionalHeader.SizeOfHeaders;
+      ImageContext->ImageType          = Hdr.Pe32Plus->OptionalHeader.Subsystem;
+      ImageContext->ImageSize          = (UINT64)Hdr.Pe32Plus->OptionalHeader.SizeOfImage;
+      ImageContext->SectionAlignment   = Hdr.Pe32Plus->OptionalHeader.SectionAlignment;
+      ImageContext->SizeOfHeaders      = Hdr.Pe32Plus->OptionalHeader.SizeOfHeaders;
+      ImageContext->DllCharacteristics = Hdr.Pe32Plus->OptionalHeader.DllCharacteristics;
     } else {
       ImageContext->ImageError = IMAGE_ERROR_INVALID_MACHINE_TYPE;
       return RETURN_UNSUPPORTED;
@@ -545,8 +547,9 @@ PeCoffLoaderGetPeHeader (
   Retrieves information about a PE/COFF image.
 
   Computes the PeCoffHeaderOffset, IsTeImage, ImageType, ImageAddress, ImageSize,
-  DestinationAddress, RelocationsStripped, SectionAlignment, SizeOfHeaders, and
-  DebugDirectoryEntryRva fields of the ImageContext structure.
+  DestinationAddress, RelocationsStripped, SectionAlignment, SizeOfHeaders,
+  DllCharacteristics, and DebugDirectoryEntryRva fields of the ImageContext
+  structure.
   If ImageContext is NULL, then return RETURN_INVALID_PARAMETER.
   If the PE/COFF image accessed through the ImageRead service in the ImageContext
   structure is not a supported PE/COFF image type, then return RETURN_UNSUPPORTED.
-- 
2.39.2