diff options
Diffstat (limited to 'gpxe/src/image/efi_image.c')
-rw-r--r-- | gpxe/src/image/efi_image.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/gpxe/src/image/efi_image.c b/gpxe/src/image/efi_image.c new file mode 100644 index 00000000..c80cd264 --- /dev/null +++ b/gpxe/src/image/efi_image.c @@ -0,0 +1,106 @@ +/* + * 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. + */ + +#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: %lx\n", + image, efirc ); + return -ENOEXEC; + } + + /* Start the image */ + if ( ( efirc = bs->StartImage ( handle, &exit_data_size, + &exit_data ) ) != 0 ) { + DBGC ( image, "EFIIMAGE %p returned with status %lx\n", + image, 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: %lx\n", + image, 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, +}; |