Part two of porting Geoff Lywood's download protocol to current iPXE

Author: Jarrod Johnson

src/image/efi_image.c

@@ -19,13 +19,19 @@
 FILE_LICENCE ( GPL2_OR_LATER );
 
 #include <errno.h>
+#include <stdlib.h>
 #include <ipxe/efi/efi.h>
 #include <ipxe/image.h>
 #include <ipxe/init.h>
 #include <ipxe/features.h>
+#include <ipxe/uri.h>
 
 FEATURE ( FEATURE_IMAGE, "EFI", DHCP_EB_FEATURE_EFI, 1 );
 
+/** EFI loaded image protocol GUID */
+static EFI_GUID efi_loaded_image_protocol_guid
+       = EFI_LOADED_IMAGE_PROTOCOL_GUID;
+
 /**
  * Execute EFI image
  *
@@ -34,7 +40,10 @@ FEATURE ( FEATURE_IMAGE, "EFI", DHCP_EB_FEATURE_EFI, 1 );
  */
 static int efi_image_exec ( struct image *image ) {
 	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
+        EFI_LOADED_IMAGE_PROTOCOL *loaded_image = NULL;
+        void *loaded_image_void;
 	EFI_HANDLE handle;
+        EFI_HANDLE device_handle = NULL;
 	UINTN exit_data_size;
 	CHAR16 *exit_data;
 	EFI_STATUS efirc;
@@ -50,13 +59,29 @@ static int efi_image_exec ( struct image *image ) {
 		return -ENOEXEC;
 	}
 
+        /* Get the loaded image protocol for the newly loaded image */
+       efirc = bs->OpenProtocol ( handle, &efi_loaded_image_protocol_guid,
+                                  &loaded_image_void, efi_image_handle, NULL,
+                                  EFI_OPEN_PROTOCOL_GET_PROTOCOL );
+       if ( efirc ) {
+               /* Should never happen */
+               rc = EFIRC_TO_RC ( efirc );
+       }
+       loaded_image = loaded_image_void;
+
+       /* Pass a GPXE download protocol to the image */
+       rc = efi_download_install ( &device_handle );
+
 	/* Start the image */
 	if ( ( efirc = bs->StartImage ( handle, &exit_data_size,
 					&exit_data ) ) != 0 ) {
 		DBGC ( image, "EFIIMAGE %p returned with status %s\n",
 		       image, efi_strerror ( efirc ) );
 	}
 	rc = EFIRC_TO_RC ( efirc );
+        if ( device_handle ) {
+		efi_download_uninstall ( device_handle );
+        }
 
 	/* Unload the image.  We can't leave it loaded, because we
 	 * have no "unload" operation.

src/include/ipxe/efi/efi.h

@@ -142,5 +142,8 @@ extern EFI_SYSTEM_TABLE *efi_systab;
 extern const char * efi_strerror ( EFI_STATUS efirc );
 extern EFI_STATUS efi_init ( EFI_HANDLE image_handle,
 			     EFI_SYSTEM_TABLE *systab );
+extern int efi_download_install ( EFI_HANDLE *device_handle );
+extern void efi_download_uninstall ( EFI_HANDLE device_handle );
+
 
 #endif /* _IPXE_EFI_H */