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MdeModulePkg PCI Bus Driver: Add more checks before dispatching an EFI PCI Option ROM image. 

* Check if the machine type of the image is supported by the current UEFI system.
* Ignore the image if it is an EFI application as required by the UEFI spec.

Signed-off-by: rsun3
Reviewed-by: li-elvin


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12465 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
rsun3 2011-09-28 07:50:58 +00:00
parent 4cb0548d01
commit a93e23f9ed
1 changed files with 30 additions and 11 deletions
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41
MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c
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@ -669,6 +669,27 @@ ProcessOpRomImage (
ImageSize = (UINT32) (Pcir->ImageLength * 512);
Indicator = Pcir->Indicator;
//
// Skip the image if it is not an EFI PCI Option ROM image
//
if (Pcir->CodeType != PCI_CODE_TYPE_EFI_IMAGE) {
goto NextImage;
}
//
// Skip the EFI PCI Option ROM image if its machine type is not supported
//
if (!EFI_IMAGE_MACHINE_TYPE_SUPPORTED (EfiRomHeader->EfiMachineType)) {
goto NextImage;
}
//
// Ignore the EFI PCI Option ROM image if it is an EFI application
//
if (EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_APPLICATION) {
goto NextImage;
}
//
// Create Pci Option Rom Image device path header
//
@ -686,19 +707,16 @@ ProcessOpRomImage (
//
BufferSize = 0;
Buffer = NULL;
Status = EFI_SUCCESS;
ImageHandle = NULL;
if (!EFI_ERROR (Status)) {
Status = gBS->LoadImage (
FALSE,
gPciBusDriverBinding.DriverBindingHandle,
PciOptionRomImageDevicePath,
Buffer,
BufferSize,
&ImageHandle
);
}
Status = gBS->LoadImage (
FALSE,
gPciBusDriverBinding.DriverBindingHandle,
PciOptionRomImageDevicePath,
Buffer,
BufferSize,
&ImageHandle
);
FreePool (PciOptionRomImageDevicePath);
@ -719,6 +737,7 @@ ProcessOpRomImage (
}
}
NextImage:
RomBarOffset += ImageSize;
} while (((Indicator & 0x80) == 0x00) && ((UINTN) (RomBarOffset - (UINT8 *) RomBar) < PciDevice->RomSize));