/* This file is part of the program psim.
- Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
+ Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
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
/* Reconize different types of boot block */
static int
-block_is_bpb(const unsigned8 block[])
+block0_is_bpb(const unsigned8 block[])
{
const char ebdic_ibma[] = { 0xc9, 0xc2, 0xd4, 0xc1 };
/* ref PowerPC Microprocessor CHRP bindings 1.2b - page 47 */
return 1;
}
-/* is_iso9660() later ... */
+
+/* Verify that the device contains an ISO-9660 File system */
static int
-block_is_fdisk(const unsigned8 block[])
+is_iso9660(device_instance *raw_disk)
{
- const int partition_type_fields[] = { 0x1c2, 0x1d2, 0x1e2, 0x1f2, 0 };
+ /* ref PowerPC Microprocessor CHRP bindings 1.2b - page 47 */
+ unsigned8 block[512];
+ if (device_instance_seek(raw_disk, 0, 512 * 64) < 0)
+ return 0;
+ if (device_instance_read(raw_disk, block, sizeof(block)) != sizeof(block))
+ return 0;
+ if (block[0] == 0x01
+ && block[1] == 'C'
+ && block[2] == 'D'
+ && block[3] == '0'
+ && block[4] == '0'
+ && block[5] == '1')
+ return 1;
+ return 0;
+}
+
+
+/* Verify that the disk block contains a valid DOS partition table.
+ While we're at it have a look around for active partitions etc.
+
+ Return 0: invalid
+ Return 1..4: valid, value returned is the first active partition
+ Return -1: no active partition */
+
+static int
+block0_is_fdisk(const unsigned8 block[])
+{
+ const int partition_type_fields[] = { 0, 0x1c2, 0x1d2, 0x1e2, 0x1f2 };
+ const int partition_active_fields[] = { 0, 0x1be, 0x1ce, 0x1de, 0xee };
int partition;
+ int active = -1;
/* ref PowerPC Microprocessor CHRP bindings 1.2b - page 47 */
/* must have LE 0xAA55 signature at offset 510 */
- if (block[511] != 0xAA && block[510] != 0x55)
+ if (block[511/*0x1ff*/] != 0xAA && block[510/*0x1fe*/] != 0x55)
return 0;
/* must contain valid partition types */
- for (partition = 0;
- partition_type_fields[partition] != 0;
- partition++) {
- switch (block[partition_type_fields[partition]]) {
- case 4: case 0x41: case 0x96:
+ for (partition = 1; partition <= 4 && active != 0; partition++) {
+ int partition_type = block[partition_type_fields[partition]];
+ int is_active = block[partition_active_fields[partition]] == 0x80;
+ const char *type;
+ switch (partition_type) {
+ case 0x00:
+ type = "UNUSED";
break;
- case 5: case 6:
- PTRACE(disklabel, ("extended partition types not supported\n"));
- return 0;
- case 0x82:
- PTRACE(disklabel, ("warning - partition %d of type 0x82 - Solaris?\n", partition));
+ case 0x01:
+ type = "FAT 12 File system";
+ break;
+ case 0x04:
+ type = "FAT 16 File system";
break;
- case 0x1:
- PTRACE(disklabel, ("warning - partition %d of type 1 - DOS12\n", partition));
+ case 0x05:
+ case 0x06:
+ type = "rejected - extended/chained partition not supported";
+ active = 0;
break;
- case 0:
+ case 0x41:
+ type = "Single program image";
+ break;
+ case 0x82:
+ type = "Solaris?";
+ break;
+ case 0x96:
+ type = "ISO 9660 File system";
break;
default:
- PTRACE(disklabel, ("rejecting partition %d of type 0x%x\n", partition,
- block[partition_type_fields[partition]]));
- return 0;
+ type = "rejected - unknown type";
+ active = 0;
+ break;
}
+ PTRACE(disklabel, ("partition %d of type 0x%02x - %s%s\n",
+ partition,
+ partition_type,
+ type,
+ is_active && active != 0 ? " (active)" : ""));
+ if (partition_type != 0 && is_active && active < 0)
+ active = partition;
}
- return 1;
+ return active;
}
+
+/* Verify that block0 corresponds to a MAC disk */
+
static int
-block_is_mac_disk(const unsigned8 block[])
+block0_is_mac_disk(const unsigned8 block[])
{
/* ref PowerPC Microprocessor CHRP bindings 1.2b - page 47 */
/* signature - BEx4552 at offset 0 */
{
int partition;
char *filename;
- unsigned8 boot_block[512];
/* parse the arguments */
if (args == NULL) {
filename = NULL; /* easier */
}
- if (device_instance_seek(raw_disk, 0, 0) < 0)
- device_error(device_instance_device(raw_disk),
- "Problem seeking on raw disk\n");
-
- if (partition < 0) {
- /* select the active partition */
- if (device_instance_read(raw_disk, &boot_block, sizeof(boot_block))
- != sizeof(boot_block))
- return raw_disk;
- device_error(device_instance_device(raw_disk),
- "selection of the active partition unimplemented\n");
- return (device_instance *)0; /* silence warnings */
- }
- else if (partition == 0) {
+ if (partition == 0) {
/* select the raw disk */
return raw_disk;
}
else {
- /* select the specified disk partition */
- /* read in the boot record */
+ unsigned8 boot_block[512];
+ /* get the boot block for examination */
+ if (device_instance_seek(raw_disk, 0, 0) < 0)
+ device_error(device_instance_device(raw_disk),
+ "Problem seeking on raw disk");
if (device_instance_read(raw_disk, &boot_block, sizeof(boot_block))
!= sizeof(boot_block))
- return raw_disk;
- if (block_is_bpb(boot_block)) {
- device_error(device_instance_device(raw_disk), "Unimplemented\n");
- }
- else if (block_is_fdisk(boot_block)) {
- /* return an instance */
- ppcboot_partition_t *partition_table = (ppcboot_partition_t*) &boot_block[446];
- ppcboot_partition_t *partition_entry;
- disklabel *label;
- if (partition > 3)
- device_error(device_instance_device(raw_disk),
- "Invalid fdisk partition number %d\n", partition);
- partition_entry = &partition_table[partition-1];
- label = ZALLOC(disklabel);
- label->raw_disk = raw_disk;
- label->pos = 0;
- label->sector_begin = 512 * sector2uw(partition_entry->sector_begin);
- label->sector_length = 512 * sector2uw(partition_entry->sector_length);
- PTRACE(disklabel, ("partition %ld, sector-begin %ld, length %ld\n",
- (long)partition, (long)label->sector_begin, (long)label->sector_length));
- if (filename != NULL)
- device_error(device_instance_device(raw_disk),
- "File names not yet supported\n");
- return device_create_instance_from(NULL, raw_disk,
- label,
- NULL, args,
- &package_disklabel_callbacks);
- }
- else if (block_is_mac_disk(boot_block)) {
- device_error(device_instance_device(raw_disk), "Unimplemented\n");
+ device_error(device_instance_device(raw_disk), "Problem reading boot block");
+
+ if (partition < 0) {
+ /* select the active partition */
+ if (block0_is_bpb(boot_block)) {
+ device_error(device_instance_device(raw_disk), "Unimplemented active BPB");
+ }
+ else if (block0_is_fdisk(boot_block)) {
+ int active = block0_is_fdisk(boot_block);
+ device_error(device_instance_device(raw_disk), "Unimplemented active FDISK (%d)",
+ active);
+ }
+ else if (is_iso9660(raw_disk)) {
+ device_error(device_instance_device(raw_disk), "Unimplemented active ISO9660");
+ }
+ else if (block0_is_mac_disk(boot_block)) {
+ device_error(device_instance_device(raw_disk), "Unimplemented active MAC DISK");
+ }
+ else {
+ device_error(device_instance_device(raw_disk), "Unreconized bootblock");
+ }
}
else {
- device_error(device_instance_device(raw_disk),
- "Unreconized bootblock\n");
+ /* select the specified disk partition */
+ if (block0_is_bpb(boot_block)) {
+ device_error(device_instance_device(raw_disk), "Unimplemented BPB");
+ }
+ else if (block0_is_fdisk(boot_block)) {
+ /* return an instance */
+ ppcboot_partition_t *partition_table = (ppcboot_partition_t*) &boot_block[446];
+ ppcboot_partition_t *partition_entry;
+ disklabel *label;
+ if (partition > 4)
+ device_error(device_instance_device(raw_disk),
+ "Only FDISK partitions 1..4 supported");
+ partition_entry = &partition_table[partition - 1];
+ label = ZALLOC(disklabel);
+ label->raw_disk = raw_disk;
+ label->pos = 0;
+ label->sector_begin = 512 * sector2uw(partition_entry->sector_begin);
+ label->sector_length = 512 * sector2uw(partition_entry->sector_length);
+ PTRACE(disklabel, ("partition %ld, sector-begin %ld, length %ld\n",
+ (long)partition,
+ (long)label->sector_begin,
+ (long)label->sector_length));
+ if (filename != NULL)
+ device_error(device_instance_device(raw_disk),
+ "FDISK file names not yet supported");
+ return device_create_instance_from(NULL, raw_disk,
+ label,
+ NULL, args,
+ &package_disklabel_callbacks);
+ }
+ else if (block0_is_mac_disk(boot_block)) {
+ device_error(device_instance_device(raw_disk), "Unimplemented MAC DISK");
+ }
+ else {
+ device_error(device_instance_device(raw_disk),
+ "Unreconized bootblock");
+ }
}
- return raw_disk;
}
-
+
+ return NULL;
}
-
-
+
+
#endif /* _PK_DISKLABEL_C_ */
projects / external / binutils.git / blobdiff