NetBSD/sys/arch/sparc/stand/installboot/installboot.c

408 lines
10 KiB
C

/* $NetBSD: installboot.c,v 1.5 1999/11/13 12:09:41 pk Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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.
*/
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <a.out.h>
#include <fcntl.h>
#include <nlist.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "loadfile.h"
int verbose, nowrite, hflag = 1;
char *boot, *proto, *dev;
#if 0
#ifdef __ELF__
#define SYMNAME(a) a
#else
#define SYMNAME(a) __CONCAT("_",a)
#endif
#else
/* XXX: Hack in libc nlist works with both formats */
#define SYMNAME(a) __CONCAT("_",a)
#endif
struct nlist nl[] = {
#define X_BLOCKTABLE 0
{ {SYMNAME("block_table")} },
#define X_BLOCKCOUNT 1
{ {SYMNAME("block_count")} },
#define X_BLOCKSIZE 2
{ {SYMNAME("block_size")} },
{ {NULL} }
};
daddr_t *block_table; /* block number array in prototype image */
int32_t *block_count_p; /* size of this array */
int32_t *block_size_p; /* filesystem block size */
int32_t max_block_count;
char *loadprotoblocks __P((char *, long *));
int loadblocknums __P((char *, int));
static void devread __P((int, void *, daddr_t, size_t, char *));
static void usage __P((void));
int main __P((int, char *[]));
static void
usage()
{
extern char *__progname;
(void)fprintf(stderr,
"Usage: %s [-n] [-v] <boot> <proto> <device>\n",
__progname);
exit(1);
}
int
main(argc, argv)
int argc;
char *argv[];
{
int c;
int devfd;
char *protostore;
long protosize;
while ((c = getopt(argc, argv, "a:vnh")) != -1) {
switch (c) {
case 'a':
warnx("-a option is obsolete");
break;
case 'h': /* Note: for backwards compatibility */
/* Don't strip a.out header */
warnx("-h option is obsolete");
break;
case 'n':
/* Do not actually write the bootblock to disk */
nowrite = 1;
break;
case 'v':
/* Chat */
verbose = 1;
break;
default:
usage();
}
}
if (argc - optind < 3) {
usage();
}
boot = argv[optind];
proto = argv[optind + 1];
dev = argv[optind + 2];
if (verbose) {
printf("boot: %s\n", boot);
printf("proto: %s\n", proto);
printf("device: %s\n", dev);
}
/* Load proto blocks into core */
if ((protostore = loadprotoblocks(proto, &protosize)) == NULL)
exit(1);
/* Open and check raw disk device */
if ((devfd = open(dev, O_RDONLY, 0)) < 0)
err(1, "open: %s", dev);
/* Extract and load block numbers */
if (loadblocknums(boot, devfd) != 0)
exit(1);
(void)close(devfd);
if (nowrite)
return 0;
/* Write patched proto bootblocks into the superblock */
if (protosize > SBSIZE - DEV_BSIZE)
errx(1, "proto bootblocks too big");
if ((devfd = open(dev, O_RDWR, 0)) < 0)
err(1, "open: %s", dev);
if (lseek(devfd, DEV_BSIZE, SEEK_SET) != DEV_BSIZE)
err(1, "lseek bootstrap");
/* Sync filesystems (to clean in-memory superblock?) */
sync();
if (write(devfd, protostore, protosize) != protosize)
err(1, "write bootstrap");
(void)close(devfd);
return 0;
}
char *
loadprotoblocks(fname, size)
char *fname;
long *size;
{
int fd, sz;
u_long ap, bp, st, en;
u_long marks[MARK_MAX];
/* Locate block number array in proto file */
if (nlist(fname, nl) != 0) {
warnx("nlist: %s: symbols not found", fname);
return NULL;
}
if (nl[X_BLOCKTABLE].n_type != N_DATA + N_EXT) {
warnx("nlist: %s: wrong type", nl[X_BLOCKTABLE].n_un.n_name);
return NULL;
}
if (nl[X_BLOCKCOUNT].n_type != N_DATA + N_EXT) {
warnx("nlist: %s: wrong type", nl[X_BLOCKCOUNT].n_un.n_name);
return NULL;
}
if (nl[X_BLOCKSIZE].n_type != N_DATA + N_EXT) {
warnx("nlist: %s: wrong type", nl[X_BLOCKSIZE].n_un.n_name);
return NULL;
}
marks[MARK_START] = 0;
if ((fd = loadfile(fname, marks, COUNT_TEXT|COUNT_DATA)) == -1)
return NULL;
(void)close(fd);
sz = (marks[MARK_END] - marks[MARK_START]) + (hflag ? 32 : 0);
sz = roundup(sz, DEV_BSIZE);
st = marks[MARK_START];
en = marks[MARK_ENTRY];
if ((ap = (u_long)malloc(sz)) == NULL) {
warn("malloc: %s", "");
return NULL;
}
bp = ap + (hflag ? 32 : 0);
marks[MARK_START] = bp - st;
if ((fd = loadfile(fname, marks, LOAD_TEXT|LOAD_DATA)) == -1)
return NULL;
(void)close(fd);
block_table = (daddr_t *) (bp + nl[X_BLOCKTABLE].n_value - st);
block_count_p = (int32_t *)(bp + nl[X_BLOCKCOUNT].n_value - st);
block_size_p = (int32_t *) (bp + nl[X_BLOCKSIZE].n_value - st);
if ((int)block_table & 3) {
warn("%s: invalid address: block_table = %p",
fname, block_table);
free((void *)bp);
return NULL;
}
if ((int)block_count_p & 3) {
warn("%s: invalid address: block_count_p = %p",
fname, block_count_p);
free((void *)bp);
return NULL;
}
if ((int)block_size_p & 3) {
warn("%s: invalid address: block_size_p = %p",
fname, block_size_p);
free((void *)bp);
return NULL;
}
max_block_count = *block_count_p;
if (verbose) {
printf("%s: entry point %#lx\n", fname, en);
printf("%s: a.out header %s\n", fname,
hflag ? "left on" : "stripped off");
printf("proto bootblock size %d\n", sz);
printf("room for %d filesystem blocks at %#lx\n",
max_block_count, nl[X_BLOCKTABLE].n_value);
}
if (hflag) {
/*
* We convert the a.out header in-vitro into something that
* Sun PROMs understand.
* Old-style (sun4) ROMs do not expect a header at all, so
* we turn the first two words into code that gets us past
* the 32-byte header where the actual code begins. In assembly
* speak:
* .word MAGIC ! a NOP
* ba,a start !
* .skip 24 ! pad
* start:
*/
#define SUN_MAGIC 0x01030107
#define SUN4_BASTART 0x30800007 /* i.e.: ba,a `start' */
*((int *)ap) = SUN_MAGIC;
*((int *)ap + 1) = SUN4_BASTART;
}
*size = sz;
return (char *)ap;
}
static void
devread(fd, buf, blk, size, msg)
int fd;
void *buf;
daddr_t blk;
size_t size;
char *msg;
{
if (lseek(fd, dbtob(blk), SEEK_SET) != dbtob(blk))
err(1, "%s: devread: lseek", msg);
if (read(fd, buf, size) != size)
err(1, "%s: devread: read", msg);
}
static char sblock[SBSIZE];
int
loadblocknums(boot, devfd)
char *boot;
int devfd;
{
int i, fd;
struct stat statbuf;
struct statfs statfsbuf;
struct fs *fs;
char *buf;
daddr_t blk, *ap;
struct dinode *ip;
int ndb;
/*
* Open 2nd-level boot program and record the block numbers
* it occupies on the filesystem represented by `devfd'.
*/
if ((fd = open(boot, O_RDONLY)) < 0)
err(1, "open: %s", boot);
if (fstatfs(fd, &statfsbuf) != 0)
err(1, "statfs: %s", boot);
if (strncmp(statfsbuf.f_fstypename, "ffs", MFSNAMELEN) &&
strncmp(statfsbuf.f_fstypename, "ufs", MFSNAMELEN)) {
errx(1, "%s: must be on an FFS filesystem", boot);
}
if (fsync(fd) != 0)
err(1, "fsync: %s", boot);
if (fstat(fd, &statbuf) != 0)
err(1, "fstat: %s", boot);
close(fd);
/* Read superblock */
devread(devfd, sblock, btodb(SBOFF), SBSIZE, "superblock");
fs = (struct fs *)sblock;
/* Read inode */
if ((buf = malloc(fs->fs_bsize)) == NULL)
errx(1, "No memory for filesystem block");
blk = fsbtodb(fs, ino_to_fsba(fs, statbuf.st_ino));
devread(devfd, buf, blk, fs->fs_bsize, "inode");
ip = (struct dinode *)(buf) + ino_to_fsbo(fs, statbuf.st_ino);
/*
* Register filesystem block size.
*/
*block_size_p = fs->fs_bsize;
/*
* Get the block numbers; we don't handle fragments
*/
ndb = howmany(ip->di_size, fs->fs_bsize);
if (ndb > max_block_count)
errx(1, "%s: Too many blocks", boot);
/*
* Register block count.
*/
*block_count_p = ndb;
if (verbose)
printf("%s: block numbers: ", boot);
ap = ip->di_db;
for (i = 0; i < NDADDR && *ap && ndb; i++, ap++, ndb--) {
blk = fsbtodb(fs, *ap);
block_table[i] = blk;
if (verbose)
printf("%d ", blk);
}
if (verbose)
printf("\n");
if (ndb == 0)
return 0;
/*
* Just one level of indirections; there isn't much room
* for more in the 1st-level bootblocks anyway.
*/
if (verbose)
printf("%s: block numbers (indirect): ", boot);
blk = ip->di_ib[0];
devread(devfd, buf, blk, fs->fs_bsize, "indirect block");
ap = (daddr_t *)buf;
for (; i < NINDIR(fs) && *ap && ndb; i++, ap++, ndb--) {
blk = fsbtodb(fs, *ap);
block_table[i] = blk;
if (verbose)
printf("%d ", blk);
}
if (verbose)
printf("\n");
if (ndb)
errx(1, "%s: Too many blocks", boot);
return 0;
}