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	dpavlin	36	/*
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