grub/partmap/apple.c
hollisb 1b14a681e4 2005-02-12 Hollis Blanchard <hollis@penguinppc.org>
* kern/partition.c (grub_partition_probe): Clear `grub_errno' and
	return 0 if `grub_errno' is GRUB_ERR_BAD_PART_TABLE.
	(part_map_iterate): Clear `grub_errno' and return 0 if
	`partmap->iterate' returns GRUB_ERR_BAD_PART_TABLE.
	* partmap/amiga.c (amiga_partition_map_iterate): Return
	GRUB_ERR_BAD_PART_TABLE if no partition map magic is found.
	* partmap/apple.c (apple_partition_map_iterate): Likewise.
2005-02-13 01:40:28 +00:00

234 lines
5.1 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* apple.c - Read macintosh partition tables. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002, 2004 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <grub/disk.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/partition.h>
#define GRUB_APPLE_PART_MAGIC 0x504D
struct grub_apple_part
{
/* The magic number to idenify this as a partition, it should have
the value `0x504D'. */
grub_uint16_t magic;
/* Reserved. */
grub_uint16_t reserved;
/* The size of the partition map in blocks. */
grub_uint32_t partmap_size;
/* The first physical block of the partition. */
grub_uint32_t first_phys_block;
/* The amount of blocks. */
grub_uint32_t blockcnt;
/* The partition name. */
char partname[32];
/* The partition type. */
char parttype[32];
/* The first datablock of the partition. */
grub_uint32_t datablocks_first;
/* The amount datablocks. */
grub_uint32_t datablocks_count;
/* The status of the partition. (???) */
grub_uint32_t status;
/* The first block on which the bootcode can be found. */
grub_uint32_t bootcode_pos;
/* The size of the bootcode in bytes. */
grub_uint32_t bootcode_size;
/* The load address of the bootcode. */
grub_uint32_t bootcode_loadaddr;
/* Reserved. */
grub_uint32_t reserved2;
/* The entrypoint of the bootcode. */
grub_uint32_t bootcode_entrypoint;
/* Reserved. */
grub_uint32_t reserved3;
/* A checksum of the bootcode. */
grub_uint32_t bootcode_checksum;
/* The processor type. */
char processor[16];
/* Padding. */
grub_uint16_t pad[187];
};
static struct grub_partition_map grub_apple_partition_map;
#ifndef GRUB_UTIL
static grub_dl_t my_mod;
#endif
static grub_err_t
apple_partition_map_iterate (grub_disk_t disk,
int (*hook) (const grub_partition_t partition))
{
struct grub_partition part;
struct grub_apple_part apart;
struct grub_disk raw;
int partno = 0;
int pos = GRUB_DISK_SECTOR_SIZE;
/* Enforce raw disk access. */
raw = *disk;
raw.partition = 0;
part.partmap = &grub_apple_partition_map;
for (;;)
{
if (grub_disk_read (&raw, pos / GRUB_DISK_SECTOR_SIZE,
pos % GRUB_DISK_SECTOR_SIZE,
sizeof (struct grub_apple_part), (char *) &apart))
return grub_errno;
if (apart.magic != GRUB_APPLE_PART_MAGIC)
break;
part.start = apart.first_phys_block;
part.len = apart.blockcnt;
part.offset = pos;
part.index = partno;
if (hook (&part))
return grub_errno;
if (apart.first_phys_block == GRUB_DISK_SECTOR_SIZE * 2)
return 0;
pos += sizeof (struct grub_apple_part);
partno++;
}
if ((pos / GRUB_DISK_SECTOR_SIZE) == 0)
return grub_error (GRUB_ERR_BAD_PART_TABLE,
"Apple partition map not found.");
return 0;
}
static grub_partition_t
apple_partition_map_probe (grub_disk_t disk, const char *str)
{
grub_partition_t p = 0;
int partnum = 0;
char *s = (char *) str;
auto int find_func (const grub_partition_t partition);
int find_func (const grub_partition_t partition)
{
if (partnum == partition->index)
{
p = (grub_partition_t) grub_malloc (sizeof (*p));
if (! p)
return 1;
grub_memcpy (p, partition, sizeof (*p));
return 1;
}
return 0;
}
/* Get the partition number. */
partnum = grub_strtoul (s, 0, 10);
if (grub_errno)
{
grub_error (GRUB_ERR_BAD_FILENAME, "invalid partition");
return 0;
}
if (apple_partition_map_iterate (disk, find_func))
goto fail;
return p;
fail:
grub_free (p);
return 0;
}
static char *
apple_partition_map_get_name (const grub_partition_t p)
{
char *name;
name = grub_malloc (13);
if (! name)
return 0;
grub_sprintf (name, "%d", p->index);
return name;
}
/* Partition map type. */
static struct grub_partition_map grub_apple_partition_map =
{
.name = "apple_partition_map",
.iterate = apple_partition_map_iterate,
.probe = apple_partition_map_probe,
.get_name = apple_partition_map_get_name
};
#ifdef GRUB_UTIL
void
grub_apple_partition_map_init (void)
{
grub_partition_map_register (&grub_apple_partition_map);
}
void
grub_apple_partition_map_fini (void)
{
grub_partition_map_unregister (&grub_apple_partition_map);
}
#else
GRUB_MOD_INIT
{
grub_partition_map_register (&grub_apple_partition_map);
my_mod = mod;
}
GRUB_MOD_FINI
{
grub_partition_map_unregister (&grub_apple_partition_map);
}
#endif