af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * CDDL HEADER START
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * The contents of this file are subject to the terms of the
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * Common Development and Distribution License (the "License").
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * You may not use this file except in compliance with the License.
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * or http://www.opensolaris.org/os/licensing.
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * See the License for the specific language governing permissions
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * and limitations under the License.
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * When distributing Covered Code, include this CDDL HEADER in each
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * If applicable, add the following below this CDDL HEADER, with the
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * fields enclosed by brackets "[]" replaced with your own identifying
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * information: Portions Copyright [yyyy] [name of copyright owner]
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * CDDL HEADER END
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
14d44f2248cc2a54490db7f7caa4da5968f90837Hans Rosenfeld * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * Common functions to deal with the fake-multiboot encapsulation of the
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * bootblock and the location of the extra information area.
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems/* mboot checksum routine. */
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystemscompute_checksum(char *data, uint32_t size)
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems for (i = 0; i < size; i += sizeof (uint32_t))
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems/* Given a buffer, look for a multiboot header within it. */
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystemsfind_multiboot(char *buffer, uint32_t buf_size, uint32_t *mboot_off)
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems /* multiboot header has to be within the first 32K. */
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems boundary = boundary - sizeof (multiboot_header_t);
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems for (i = 0; i < boundary; i += 4, iter++) {
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems mboot = (multiboot_header_t *)iter;
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems if (mboot->magic != MB_HEADER_MAGIC)
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems /* Found magic signature -- check checksum. */
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems cksum = -(mboot->flags + mboot->magic);
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems if (mboot->checksum != cksum) {
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems BOOT_DEBUG("multiboot magic found at %p, but checksum "
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems "mismatches (is %x, should be %x)\n", mboot,
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems if (!(mboot->flags & BB_MBOOT_AOUT_FLAG)) {
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems BOOT_DEBUG("multiboot structure found, but no "
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems "AOUT kludge specified, skipping.\n");
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems /* proper multiboot structure found. */
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * Given a pointer to the extra information area (a sequence of bb_header_ext_t
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * + payload chunks), find the extended information structure.
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems bb_header_ext_t *ext_header;
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems ext_header = (bb_header_ext_t *)extra;
14d44f2248cc2a54490db7f7caa4da5968f90837Hans Rosenfeld BOOT_DEBUG("Unable to find extended versioning information, "
14d44f2248cc2a54490db7f7caa4da5968f90837Hans Rosenfeld "data size too big\n");
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems cksum = compute_checksum(extra + sizeof (bb_header_ext_t),
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems BOOT_DEBUG("Extended information header checksum is %x\n", cksum);
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems if (cksum != ext_header->checksum) {
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems BOOT_DEBUG("Unable to find extended versioning information, "
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems "data looks corrupted\n");
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * Currently we only have one extra header so it must be encapsulating
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * the extended information structure.
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems einfo = (bblk_einfo_t *)(extra + sizeof (bb_header_ext_t));
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems if (memcmp(einfo->magic, EINFO_MAGIC, EINFO_MAGIC_SIZE) != 0) {
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems BOOT_DEBUG("Unable to read stage2 extended versioning "
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems "information, wrong magic identifier\n");
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems BOOT_DEBUG("Found %s, expected %s\n", einfo->magic,
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * Given a pointer to the extra area, add the extended information structure
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems * encapsulated by a bb_header_ext_t structure.
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystemsadd_einfo(char *extra, char *updt_str, bblk_hs_t *hs, uint32_t avail_space)
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems BOOT_DEBUG("WARNING: no update string passed to "
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems "add_stage2_einfo()\n");
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems /* Reserve space for the extra header. */
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems ext_hdr = (bb_header_ext_t *)extra;
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems dest = (unsigned char *)extra + sizeof (*ext_hdr);
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems /* Place the extended information structure. */
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems ret = prepare_and_write_einfo(dest, updt_str, hs, avail_space,
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems (void) fprintf(stderr, gettext("Unable to write the extended "
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems "versioning information\n"));
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems /* Fill the extended information associated header. */
af28f636873b7156cfd73ceffa927658cca33fd0Enrico Perla - Sun Microsystems ext_hdr->size = P2ROUNDUP(used_space, 8);