2 * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>.
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.
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.
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., 51 Franklin Street, Fifth Floor, Boston, MA
20 FILE_LICENCE ( GPL2_OR_LATER );
24 #include <ipxe/image.h>
26 #include <ipxe/features.h>
27 #include <ipxe/init.h>
36 FEATURE ( FEATURE_IMAGE, "ELF", DHCP_EB_FEATURE_ELF, 1 );
42 * @ret rc Return status code
44 static int elfboot_exec ( struct image *image ) {
49 /* Load the image using core ELF support */
50 if ( ( rc = elf_load ( image, &entry, &max ) ) != 0 ) {
51 DBGC ( image, "ELF %p could not load: %s\n",
52 image, strerror ( rc ) );
56 /* An ELF image has no callback interface, so we need to shut
57 * down before invoking it.
61 /* Jump to OS with flat physical addressing */
62 DBGC ( image, "ELF %p starting execution at %lx\n", image, entry );
63 __asm__ __volatile__ ( PHYS_CODE ( "pushl %%ebp\n\t" /* gcc bug */
65 "popl %%ebp\n\t" /* gcc bug */ )
67 : "eax", "ebx", "ecx", "edx", "esi", "memory" );
69 DBGC ( image, "ELF %p returned\n", image );
71 /* It isn't safe to continue after calling shutdown() */
74 return -ECANCELED; /* -EIMPOSSIBLE, anyone? */
81 * @ret rc Return status code
83 static int elfboot_probe ( struct image *image ) {
85 static const uint8_t e_ident[] = {
90 [EI_CLASS] = ELFCLASS32,
91 [EI_DATA] = ELFDATA2LSB,
92 [EI_VERSION] = EV_CURRENT,
96 copy_from_user ( &ehdr, image->data, 0, sizeof ( ehdr ) );
97 if ( memcmp ( ehdr.e_ident, e_ident, sizeof ( e_ident ) ) != 0 ) {
98 DBG ( "Invalid ELF identifier\n" );
105 /** ELF image type */
106 struct image_type elfboot_image_type __image_type ( PROBE_NORMAL ) = {
108 .probe = elfboot_probe,
109 .exec = elfboot_exec,