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Annotation of qemu/roms/ipxe/src/image/efi_image.c, revision 1.1.1.1

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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