Greetings!
We implemented a driver that runs an EFI application on the system using the
LoadImage and StartImage functions present in the EFI_BOOT_SERVICES (gBS)
structure.
The source code of the main function that performs the load and start of the
EFI application is presented below:
/*
* EFI Application
*/
EFI_STATUS
StartEfiApplication(VOID)
{
EFI_STATUS Status = EFI_SUCCESS;
EFI_HANDLE InMemoryImageHandle = NULL;
if(AppData == NULL || AppSize == 0) {
Status = EFI_NOT_READY;
goto FINISH;
}
// Access Denied error occurs after this call
Status = gBS->LoadImage(FALSE, gImageHandle, NULL,
AppData, AppSize, &InMemoryImageHandle);
if(EFI_ERROR(Status)) {
goto FINISH;
}
Status = gBS->StartImage(InMemoryImageHandle, NULL, NULL);
FINISH:
return Status;
} When we tested this driver, loading it in the EFI Shell, several systems were
able to execute the EFI application after loading the driver, however, on a
specific system, the LoadImage function returns the status of Access Denied.
After an investigation we found that this scenario might be related to Secure
Boot, but we are testing with it disabled and the behavior is the same.
Would you have any other suggestions for solving this scenario?
Best regards!
Gabriel
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