| /* |
| * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of the |
| * License, or any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| FILE_LICENCE ( GPL2_OR_LATER ); |
| |
| #include <errno.h> |
| #include <gpxe/efi/efi.h> |
| #include <gpxe/image.h> |
| #include <gpxe/features.h> |
| |
| FEATURE ( FEATURE_IMAGE, "EFI", DHCP_EB_FEATURE_EFI, 1 ); |
| |
| struct image_type efi_image_type __image_type ( PROBE_NORMAL ); |
| |
| /** |
| * Execute EFI image |
| * |
| * @v image EFI image |
| * @ret rc Return status code |
| */ |
| static int efi_image_exec ( struct image *image ) { |
| EFI_BOOT_SERVICES *bs = efi_systab->BootServices; |
| EFI_HANDLE handle; |
| UINTN exit_data_size; |
| CHAR16 *exit_data; |
| EFI_STATUS efirc; |
| |
| /* Attempt loading image */ |
| if ( ( efirc = bs->LoadImage ( FALSE, efi_image_handle, NULL, |
| user_to_virt ( image->data, 0 ), |
| image->len, &handle ) ) != 0 ) { |
| /* Not an EFI image */ |
| DBGC ( image, "EFIIMAGE %p could not load: %s\n", |
| image, efi_strerror ( efirc ) ); |
| return -ENOEXEC; |
| } |
| |
| /* 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 ) ); |
| goto done; |
| } |
| |
| done: |
| /* Unload the image. We can't leave it loaded, because we |
| * have no "unload" operation. |
| */ |
| bs->UnloadImage ( handle ); |
| |
| return EFIRC_TO_RC ( efirc ); |
| } |
| |
| /** |
| * Load EFI image into memory |
| * |
| * @v image EFI file |
| * @ret rc Return status code |
| */ |
| static int efi_image_load ( struct image *image ) { |
| EFI_BOOT_SERVICES *bs = efi_systab->BootServices; |
| EFI_HANDLE handle; |
| EFI_STATUS efirc; |
| |
| /* Attempt loading image */ |
| if ( ( efirc = bs->LoadImage ( FALSE, efi_image_handle, NULL, |
| user_to_virt ( image->data, 0 ), |
| image->len, &handle ) ) != 0 ) { |
| /* Not an EFI image */ |
| DBGC ( image, "EFIIMAGE %p could not load: %s\n", |
| image, efi_strerror ( efirc ) ); |
| return -ENOEXEC; |
| } |
| |
| /* This is an EFI image */ |
| if ( ! image->type ) |
| image->type = &efi_image_type; |
| |
| /* Unload the image. We can't leave it loaded, because we |
| * have no "unload" operation. |
| */ |
| bs->UnloadImage ( handle ); |
| |
| return 0; |
| } |
| |
| /** EFI image type */ |
| struct image_type efi_image_type __image_type ( PROBE_NORMAL ) = { |
| .name = "EFI", |
| .load = efi_image_load, |
| .exec = efi_image_exec, |
| }; |