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NetBSD/usr.sbin/installboot/arch/vax.c

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/* $NetBSD: vax.c,v 1.9 2003/04/15 14:22:14 dsl Exp $ */
/*-
* Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Simon Burge.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn of Wasabi Systems.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Copyright (c) 1999 Christopher G. Demetriou. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou
* for the NetBSD Project.
* 4. 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 ``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 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.
*/
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(__lint)
__RCSID("$NetBSD: vax.c,v 1.9 2003/04/15 14:22:14 dsl Exp $");
#endif /* !__lint */
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/param.h>
#include <assert.h>
#include <err.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "installboot.h"
static int load_bootstrap(ib_params *, char **,
uint32_t *, uint32_t *, size_t *);
int
vax_clearboot(ib_params *params)
{
struct vax_boot_block bb;
ssize_t rv;
assert(params != NULL);
assert(params->fsfd != -1);
assert(params->filesystem != NULL);
assert(sizeof(struct vax_boot_block) == VAX_BOOT_BLOCK_BLOCKSIZE);
rv = pread(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET);
if (rv == -1) {
warn("Reading `%s'", params->filesystem);
return (0);
} else if (rv != sizeof(bb)) {
warnx("Reading `%s': short read", params->filesystem);
return (0);
}
if (bb.bb_id_offset * 2 != offsetof(struct vax_boot_block, bb_magic1)
|| bb.bb_magic1 != VAX_BOOT_MAGIC1) {
warnx(
"Old boot block magic number invalid; boot block invalid");
return (0);
}
bb.bb_id_offset = 1;
bb.bb_mbone = 0;
bb.bb_lbn_hi = 0;
bb.bb_lbn_low = 0;
if (params->flags & IB_SUNSUM) {
uint16_t sum;
sum = compute_sunsum((uint16_t *)&bb);
if (! set_sunsum(params, (uint16_t *)&bb, sum))
return (0);
}
if (params->flags & IB_VERBOSE)
printf("%slearing boot block\n",
(params->flags & IB_NOWRITE) ? "Not c" : "C");
if (params->flags & IB_NOWRITE)
return (1);
rv = pwrite(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET);
if (rv == -1) {
warn("Writing `%s'", params->filesystem);
return (0);
} else if (rv != sizeof(bb)) {
warnx("Writing `%s': short write", params->filesystem);
return (0);
}
return (1);
}
int
vax_setboot(ib_params *params)
{
struct stat bootstrapsb;
struct vax_boot_block bb;
uint32_t startblock;
int retval;
char *bootstrapbuf;
size_t bootstrapsize;
uint32_t bootstrapload, bootstrapexec;
ssize_t rv;
assert(params != NULL);
assert(params->fsfd != -1);
assert(params->filesystem != NULL);
assert(params->s1fd != -1);
assert(params->stage1 != NULL);
assert(sizeof(struct vax_boot_block) == VAX_BOOT_BLOCK_BLOCKSIZE);
retval = 0;
bootstrapbuf = NULL;
if (fstat(params->s1fd, &bootstrapsb) == -1) {
warn("Examining `%s'", params->stage1);
goto done;
}
if (!S_ISREG(bootstrapsb.st_mode)) {
warnx("`%s' must be a regular file", params->stage1);
goto done;
}
if (! load_bootstrap(params, &bootstrapbuf, &bootstrapload,
&bootstrapexec, &bootstrapsize))
goto done;
rv = pread(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET);
if (rv == -1) {
warn("Reading `%s'", params->filesystem);
goto done;
} else if (rv != sizeof(bb)) {
warnx("Reading `%s': short read", params->filesystem);
goto done;
}
/* fill in the updated boot block fields */
if (params->flags & IB_APPEND) {
struct stat filesyssb;
if (fstat(params->fsfd, &filesyssb) == -1) {
warn("Examining `%s'", params->filesystem);
goto done;
}
if (!S_ISREG(filesyssb.st_mode)) {
warnx(
"`%s' must be a regular file to append a bootstrap",
params->filesystem);
goto done;
}
startblock = howmany(filesyssb.st_size,
VAX_BOOT_BLOCK_BLOCKSIZE);
} else if (params->flags & IB_STAGE1START) {
startblock = params->s1start;
} else {
startblock = VAX_BOOT_BLOCK_OFFSET / VAX_BOOT_BLOCK_BLOCKSIZE
+ 1;
}
bb.bb_id_offset = offsetof(struct vax_boot_block, bb_magic1) / 2;
bb.bb_mbone = 1;
bb.bb_lbn_hi = htole16((uint16_t) (startblock >> 16));
bb.bb_lbn_low = htole16((uint16_t) (startblock >> 0));
/*
* Now the identification block
*/
bb.bb_magic1 = VAX_BOOT_MAGIC1;
bb.bb_mbz1 = 0;
bb.bb_sum1 = ~(bb.bb_magic1 + bb.bb_mbz1 + bb.bb_pad1);
bb.bb_mbz2 = 0;
bb.bb_volinfo = VAX_BOOT_VOLINFO_NONE;
bb.bb_pad2a = 0;
bb.bb_pad2b = 0;
bb.bb_size = htole32(bootstrapsize / VAX_BOOT_BLOCK_BLOCKSIZE);
bb.bb_load = htole32(VAX_BOOT_LOAD);
bb.bb_entry = htole32(VAX_BOOT_ENTRY);
bb.bb_sum3 = htole32(le32toh(bb.bb_size) + le32toh(bb.bb_load) \
+ le32toh(bb.bb_entry));
if (params->flags & IB_SUNSUM) {
uint16_t sum;
sum = compute_sunsum((uint16_t *)&bb);
if (! set_sunsum(params, (uint16_t *)&bb, sum))
goto done;
}
if (params->flags & IB_VERBOSE) {
printf("Bootstrap start sector: %u\n", startblock);
printf("Bootstrap sector count: %u\n", le32toh(bb.bb_size));
printf("%sriting bootstrap\n",
(params->flags & IB_NOWRITE) ? "Not w" : "W");
}
if (params->flags & IB_NOWRITE) {
retval = 1;
goto done;
}
rv = pwrite(params->fsfd, bootstrapbuf, bootstrapsize,
startblock * VAX_BOOT_BLOCK_BLOCKSIZE);
if (rv == -1) {
warn("Writing `%s'", params->filesystem);
goto done;
} else if (rv != bootstrapsize) {
warnx("Writing `%s': short write", params->filesystem);
goto done;
}
if (params->flags & IB_VERBOSE)
printf("Writing boot block\n");
rv = pwrite(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET);
if (rv == -1) {
warn("Writing `%s'", params->filesystem);
goto done;
} else if (rv != sizeof(bb)) {
warnx("Writing `%s': short write", params->filesystem);
goto done;
} else {
retval = 1;
}
done:
if (bootstrapbuf)
free(bootstrapbuf);
return (retval);
}
static int
load_bootstrap(ib_params *params, char **data,
uint32_t *loadaddr, uint32_t *execaddr, size_t *len)
{
ssize_t cc;
size_t buflen;
buflen = 512 * (VAX_BOOT_SIZE + 1);
*data = malloc(buflen);
if (*data == NULL) {
warn("Allocating %lu bytes", (unsigned long) buflen);
return (0);
}
cc = pread(params->s1fd, *data, buflen, 0);
if (cc <= 0) {
warn("Reading `%s'", params->stage1);
return (0);
}
if (cc > 512 * VAX_BOOT_SIZE) {
warnx("`%s': too large", params->stage1);
return (0);
}
*len = roundup(cc, VAX_BOOT_BLOCK_BLOCKSIZE);
*loadaddr = VAX_BOOT_LOAD;
*execaddr = VAX_BOOT_ENTRY;
return (1);
}
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