1 files changed, 79 insertions, 0 deletions
diff --git a/gnu-efi-3.0/apps/drv0_use.c b/gnu-efi-3.0/apps/drv0_use.c
new file mode 100644
index 0000000..f7c5869
--- /dev/null
+++ b/gnu-efi-3.0/apps/drv0_use.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2013 David Decotigny <decot@googlers.com>
+ *
+ * See drv0.c for an example session.
+ */
+
+#include <efi.h>
+#include <efilib.h>
+#include "drv0.h"
+
+
+static EFI_GUID GnuEfiAppsDrv0ProtocolGuid
+  = GNU_EFI_APPS_DRV0_PROTOCOL_GUID;
+
+
+static
+EFI_STATUS
+PlayWithGnuEfiAppsDrv0Protocol(IN EFI_HANDLE DrvHandle) {
+  EFI_STATUS Status;
+  GNU_EFI_APPS_DRV0_PROTOCOL *drv = NULL;
+  UINTN NumberOfHello = 0;
+
+  Status = uefi_call_wrapper(BS->OpenProtocol, 6,
+                             DrvHandle,
+                             &GnuEfiAppsDrv0ProtocolGuid,
+                             &drv,
+                             DrvHandle,
+                             NULL,
+                             EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+  if (EFI_ERROR(Status)) {
+    Print(L"Cannot open proto: %d\n", Status);
+    return Status;
+  }
+
+  Status = uefi_call_wrapper(drv->SayHello, 2, drv, L"Sample UEFI Driver");
+  if (EFI_ERROR(Status)) {
+    Print(L"Cannot call SayHello: %d\n", Status);
+  }
+
+  Status = uefi_call_wrapper(drv->GetNumberOfHello, 2, drv, &NumberOfHello);
+  if (EFI_ERROR(Status)) {
+    Print(L"Cannot call GetNumberOfHello: %d\n", Status);
+  } else {
+    Print(L"Hello was called %d time(s).\n", NumberOfHello);
+  }
+
+  return EFI_SUCCESS;
+}
+
+
+EFI_STATUS
+efi_main (EFI_HANDLE Image, EFI_SYSTEM_TABLE *SysTab)
+{
+  EFI_STATUS Status;
+  EFI_HANDLE *Handles = NULL;
+  UINTN i, NoHandles = 0;
+
+  InitializeLib(Image, SysTab);
+
+  Status = LibLocateHandle(ByProtocol, &GnuEfiAppsDrv0ProtocolGuid,
+                           NULL, &NoHandles, &Handles);
+  if (EFI_ERROR(Status)) {
+    Print(L"Error looking up handles for proto: %d\n", Status);
+    return Status;
+  }
+
+  for (i = 0 ; i < NoHandles ; ++i)
+  {
+    Print(L"Playing with driver instance %d...\n", i);
+    Status = PlayWithGnuEfiAppsDrv0Protocol(Handles[i]);
+    if (EFI_ERROR(Status))
+      Print(L"Error playing with instance %d, skipping\n", i);
+  }
+
+  if (Handles)
+    FreePool(Handles);
+
+  return EFI_SUCCESS;
+}