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Annotation of qemu/roms/ipxe/src/image/efi_image.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (C) 2008 Michael Brown <[email protected]>.
        !             3:  *
        !             4:  * This program is free software; you can redistribute it and/or
        !             5:  * modify it under the terms of the GNU General Public License as
        !             6:  * published by the Free Software Foundation; either version 2 of the
        !             7:  * License, or any later version.
        !             8:  *
        !             9:  * This program is distributed in the hope that it will be useful, but
        !            10:  * WITHOUT ANY WARRANTY; without even the implied warranty of
        !            11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            12:  * General Public License for more details.
        !            13:  *
        !            14:  * You should have received a copy of the GNU General Public License
        !            15:  * along with this program; if not, write to the Free Software
        !            16:  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
        !            17:  */
        !            18: 
        !            19: FILE_LICENCE ( GPL2_OR_LATER );
        !            20: 
        !            21: #include <errno.h>
        !            22: #include <ipxe/efi/efi.h>
        !            23: #include <ipxe/image.h>
        !            24: #include <ipxe/init.h>
        !            25: #include <ipxe/features.h>
        !            26: 
        !            27: FEATURE ( FEATURE_IMAGE, "EFI", DHCP_EB_FEATURE_EFI, 1 );
        !            28: 
        !            29: /**
        !            30:  * Execute EFI image
        !            31:  *
        !            32:  * @v image            EFI image
        !            33:  * @ret rc             Return status code
        !            34:  */
        !            35: static int efi_image_exec ( struct image *image ) {
        !            36:        EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
        !            37:        EFI_HANDLE handle;
        !            38:        UINTN exit_data_size;
        !            39:        CHAR16 *exit_data;
        !            40:        EFI_STATUS efirc;
        !            41:        int rc;
        !            42: 
        !            43:        /* Attempt loading image */
        !            44:        if ( ( efirc = bs->LoadImage ( FALSE, efi_image_handle, NULL,
        !            45:                                       user_to_virt ( image->data, 0 ),
        !            46:                                       image->len, &handle ) ) != 0 ) {
        !            47:                /* Not an EFI image */
        !            48:                DBGC ( image, "EFIIMAGE %p could not load: %s\n",
        !            49:                       image, efi_strerror ( efirc ) );
        !            50:                return -ENOEXEC;
        !            51:        }
        !            52: 
        !            53:        /* Start the image */
        !            54:        if ( ( efirc = bs->StartImage ( handle, &exit_data_size,
        !            55:                                        &exit_data ) ) != 0 ) {
        !            56:                DBGC ( image, "EFIIMAGE %p returned with status %s\n",
        !            57:                       image, efi_strerror ( efirc ) );
        !            58:        }
        !            59:        rc = EFIRC_TO_RC ( efirc );
        !            60: 
        !            61:        /* Unload the image.  We can't leave it loaded, because we
        !            62:         * have no "unload" operation.
        !            63:         */
        !            64:        bs->UnloadImage ( handle );
        !            65: 
        !            66:        return rc;
        !            67: }
        !            68: 
        !            69: /**
        !            70:  * Probe EFI image
        !            71:  *
        !            72:  * @v image            EFI file
        !            73:  * @ret rc             Return status code
        !            74:  */
        !            75: static int efi_image_probe ( struct image *image ) {
        !            76:        EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
        !            77:        EFI_HANDLE handle;
        !            78:        EFI_STATUS efirc;
        !            79: 
        !            80:        /* Attempt loading image */
        !            81:        if ( ( efirc = bs->LoadImage ( FALSE, efi_image_handle, NULL,
        !            82:                                       user_to_virt ( image->data, 0 ),
        !            83:                                       image->len, &handle ) ) != 0 ) {
        !            84:                /* Not an EFI image */
        !            85:                DBGC ( image, "EFIIMAGE %p could not load: %s\n",
        !            86:                       image, efi_strerror ( efirc ) );
        !            87:                return -ENOEXEC;
        !            88:        }
        !            89: 
        !            90:        /* Unload the image.  We can't leave it loaded, because we
        !            91:         * have no "unload" operation.
        !            92:         */
        !            93:        bs->UnloadImage ( handle );
        !            94: 
        !            95:        return 0;
        !            96: }
        !            97: 
        !            98: /** EFI image type */
        !            99: struct image_type efi_image_type __image_type ( PROBE_NORMAL ) = {
        !           100:        .name = "EFI",
        !           101:        .probe = efi_image_probe,
        !           102:        .exec = efi_image_exec,
        !           103: };

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