UEFI Spec HTTP Boot Device Path, after retrieving the boot resource
information, the BootURI device path node will be updated to include
the BootURI information. It means the device path on the child handle
will be updated after the LoadFile() service is called.
To handle this case, UefiBootManagerLib BmGetLoadOptionBuffer API
is updated as the below:
1) Get Device handle based on Device Path
2) Call LoadFile() service (GetFileBufferByFilePath() API) to get Load File
Buffer.
3) Retrieve DevicePath from Device handle
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming....@intel.com>
---
MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
index 2d3d57b..1b769fb 100644
--- a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
+++ b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
@@ -1491,13 +1491,22 @@ BmGetLoadOptionBuffer (
//
// Directly reads the load option when it doesn't reside in simple file
system instance (LoadFile/LoadFile2),
// or it directly points to a file in simple file system instance.
//
+ Node = FilePath;
+ Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &Node, &Handle);
FileBuffer = GetFileBufferByFilePath (TRUE, FilePath, FileSize,
&AuthenticationStatus);
if (FileBuffer != NULL) {
- *FullPath = DuplicateDevicePath (FilePath);
+ if (EFI_ERROR (Status)) {
+ *FullPath = DuplicateDevicePath (FilePath);
+ } else {
+ //
+ // LoadFile () may cause the device path of the Handle be updated.
+ //
+ *FullPath = AppendDevicePath (DevicePathFromHandle (Handle), Node);
+ }
}
return FileBuffer;
}
--
1.9.5.msysgit.0
------------------------------------------------------------------------------
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