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

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/* $NetBSD: vax.c,v 1.17 2013/06/16 19:05:00 martin Exp $ */
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/*-
* 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.
*
* 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.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#if !defined(__lint)
__RCSID("$NetBSD: vax.c,v 1.17 2013/06/16 19:05:00 martin Exp $");
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#endif /* !__lint */
#include <sys/param.h>
#ifdef HAVE_NBTOOL_CONFIG_H
#include <nbinclude/vax/disklabel.h>
#else
#include <sys/disklabel.h>
#endif
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#include <assert.h>
#include <err.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include <unistd.h>
#include "installboot.h"
#ifndef __CTASSERT
#define __CTASSERT(X)
#endif
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static int load_bootstrap(ib_params *, char **,
uint32_t *, uint32_t *, size_t *);
static int vax_clearboot(ib_params *);
static int vax_setboot(ib_params *);
struct ib_mach ib_mach_vax =
{ "vax", vax_setboot, vax_clearboot, no_editboot,
IB_STAGE1START | IB_APPEND | IB_SUNSUM };
static 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);
__CTASSERT(sizeof(bb)==VAX_BOOT_BLOCK_BLOCKSIZE);
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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 >= VAX_BOOT_BLOCK_BLOCKSIZE
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|| 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);
}
static int
vax_setboot(ib_params *params)
{
struct stat bootstrapsb;
struct vax_boot_block *bb;
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uint32_t startblock;
int retval;
char *bootstrapbuf, oldbb[VAX_BOOT_BLOCK_BLOCKSIZE];
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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);
/* see sys/arch/vax/boot/xxboot/start.S for explanation */
__CTASSERT(offsetof(struct vax_boot_block,bb_magic1) == 0x19e);
__CTASSERT(sizeof(struct vax_boot_block) == VAX_BOOT_BLOCK_BLOCKSIZE);
startblock = 0;
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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;
/* read old boot block */
rv = pread(params->fsfd, oldbb, sizeof(oldbb), VAX_BOOT_BLOCK_OFFSET);
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if (rv == -1) {
warn("Reading `%s'", params->filesystem);
goto done;
} else if (rv != sizeof(oldbb)) {
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warnx("Reading `%s': short read", params->filesystem);
goto done;
}
/*
* Copy disklabel from old boot block to new.
* Assume everything between LABELOFFSET and the start of
* the param block is scratch area and can be copied over.
*/
memcpy(bootstrapbuf+LABELOFFSET,
oldbb+LABELOFFSET,
offsetof(struct vax_boot_block,bb_magic1)-LABELOFFSET);
/* point to bootblock at begining of bootstrap */
bb = (struct vax_boot_block*)bootstrapbuf;
/* fill in the updated boot block fields */
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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);
bb->bb_lbn_hi = htole16((uint16_t) (startblock >> 16));
bb->bb_lbn_low = htole16((uint16_t) (startblock >> 0));
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}
if (params->flags & IB_SUNSUM) {
uint16_t sum;
sum = compute_sunsum((uint16_t *)bb);
if (! set_sunsum(params, (uint16_t *)bb, sum))
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goto done;
}
if (params->flags & IB_VERBOSE) {
printf("Bootstrap start sector: %u\n", startblock);
printf("Bootstrap sector count: %u\n", le32toh(bb->bb_size));
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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, 0);
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if (rv == -1) {
warn("Writing `%s'", params->filesystem);
goto done;
} else if ((size_t)rv != bootstrapsize) {
warnx("Writing `%s': short write", params->filesystem);
goto done;
}
retval = 1;
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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);
}