src/disk/bootblock_apple.c

/*
 *  Copyright (C) 2006-2007  Anders Gavare.  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright  
 *     notice, this list of conditions and the following disclaimer in the 
 *     documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 *  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE   
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 *  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *
 *
 *  $Id: bootblock_apple.c,v 1.1 2007/03/16 14:45:30 debug Exp $
 *
 *  Apple bootblock handling.
 *
 *  TODO: This is just a quick hack skeleton. Doesn't really work yet.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "diskimage.h"
#include "misc.h"


/*
 *  apple_load_bootblock():
 *
 *  Try to load a kernel from a disk image with an Apple Partition Table.
 *
 *  TODO: This function uses too many magic offsets and so on; it should be
 *  cleaned up some day. See http://www.awprofessional.com/articles/
 *      article.asp?p=376123&seqNum=3&rl=1  for some info on the Apple
 *  partition format.
 *
 *  Returns 1 on success, 0 on failure.
 */
int apple_load_bootblock(struct machine *m, struct cpu *cpu,
        int disk_id, int disk_type, int *n_loadp, char ***load_namesp)
{
        unsigned char buf[0x8000];
        int res, partnr, n_partitions = 0, n_hfs_partitions = 0;
        uint64_t hfs_start, hfs_length;

        res = diskimage_access(m, disk_id, disk_type, 0, 0x0, buf, sizeof(buf));
        if (!res) {
                fatal("apple_load_bootblock: couldn't read the disk "
                    "image. Aborting.\n");
                return 0;
        }

        partnr = 0;
        do {
                int start, length;
                int ofs = 0x200 * (partnr + 1);
                if (partnr == 0)
                        n_partitions = buf[ofs + 7];
                start = ((uint64_t)buf[ofs + 8] << 24) + (buf[ofs + 9] << 16) +
                    (buf[ofs + 10] << 8) + buf[ofs + 11];
                length = ((uint64_t)buf[ofs+12] << 24) + (buf[ofs + 13] << 16) +
                    (buf[ofs + 14] << 8) + buf[ofs + 15];

                debug("partition %i: '%s', type '%s', start %i, length %i\n",
                    partnr, buf + ofs + 0x10, buf + ofs + 0x30,
                    start, length);

                if (strcmp((char *)buf + ofs + 0x30, "Apple_HFS") == 0) {
                        n_hfs_partitions ++;
                        hfs_start = 512 * start;
                        hfs_length = 512 * length;
                }

                /*  Any more partitions?  */
                partnr ++;
        } while (partnr < n_partitions);

        if (n_hfs_partitions == 0) {
                fatal("Error: No HFS partition found! TODO\n");
                return 0;
        }
        if (n_hfs_partitions >= 2) {
                fatal("Error: Too many HFS partitions found! TODO\n");
                return 0;
        }

        return 0;
}


1	/*
2	* Copyright (C) 2006-2007 Anders Gavare. All rights reserved.
3	*
4	* Redistribution and use in source and binary forms, with or without
5	* modification, are permitted provided that the following conditions are met:
6	*
7	* 1. Redistributions of source code must retain the above copyright
8	* notice, this list of conditions and the following disclaimer.
9	* 2. Redistributions in binary form must reproduce the above copyright
10	* notice, this list of conditions and the following disclaimer in the
11	* documentation and/or other materials provided with the distribution.
12	* 3. The name of the author may not be used to endorse or promote products
13	* derived from this software without specific prior written permission.
14	*
15	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25	* SUCH DAMAGE.
26	*
27	*
28	* $Id: bootblock_apple.c,v 1.1 2007/03/16 14:45:30 debug Exp $
29	*
30	* Apple bootblock handling.
31	*
32	* TODO: This is just a quick hack skeleton. Doesn't really work yet.
33	*/
34
35	#include <stdio.h>
36	#include <stdlib.h>
37	#include <string.h>
38
39	#include "diskimage.h"
40	#include "misc.h"
41
42
43	/*
44	* apple_load_bootblock():
45	*
46	* Try to load a kernel from a disk image with an Apple Partition Table.
47	*
48	* TODO: This function uses too many magic offsets and so on; it should be
49	* cleaned up some day. See http://www.awprofessional.com/articles/
50	* article.asp?p=376123&seqNum=3&rl=1 for some info on the Apple
51	* partition format.
52	*
53	* Returns 1 on success, 0 on failure.
54	*/
55	int apple_load_bootblock(struct machine m, struct cpu cpu,
56	int disk_id, int disk_type, int n_loadp, char **load_namesp)
57	{
58	unsigned char buf[0x8000];
59	int res, partnr, n_partitions = 0, n_hfs_partitions = 0;
60	uint64_t hfs_start, hfs_length;
61
62	res = diskimage_access(m, disk_id, disk_type, 0, 0x0, buf, sizeof(buf));
63	if (!res) {
64	fatal("apple_load_bootblock: couldn't read the disk "
65	"image. Aborting.\n");
66	return 0;
67	}
68
69	partnr = 0;
70	do {
71	int start, length;
72	int ofs = 0x200 * (partnr + 1);
73	if (partnr == 0)
74	n_partitions = buf[ofs + 7];
75	start = ((uint64_t)buf[ofs + 8] << 24) + (buf[ofs + 9] << 16) +
76	(buf[ofs + 10] << 8) + buf[ofs + 11];
77	length = ((uint64_t)buf[ofs+12] << 24) + (buf[ofs + 13] << 16) +
78	(buf[ofs + 14] << 8) + buf[ofs + 15];
79
80	debug("partition %i: '%s', type '%s', start %i, length %i\n",
81	partnr, buf + ofs + 0x10, buf + ofs + 0x30,
82	start, length);
83
84	if (strcmp((char *)buf + ofs + 0x30, "Apple_HFS") == 0) {
85	n_hfs_partitions ++;
86	hfs_start = 512 * start;
87	hfs_length = 512 * length;
88	}
89
90	/* Any more partitions? */
91	partnr ++;
92	} while (partnr < n_partitions);
93
94	if (n_hfs_partitions == 0) {
95	fatal("Error: No HFS partition found! TODO\n");
96	return 0;
97	}
98	if (n_hfs_partitions >= 2) {
99	fatal("Error: Too many HFS partitions found! TODO\n");
100	return 0;
101	}
102
103	return 0;
104	}
105
106