4.4BSD/usr/src/sys/pmax/stand/mkboottape.c
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* @(#)mkboottape.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/exec.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <err.h>
#include <pmax/stand/dec_boot.h>
#include <pmax/stand/dec_exec.h>
void usage __P((void));
struct Dec_DiskBoot decBootInfo;
struct coff_exec dec_exec;
extern char *__progname; /* Program name, from crt0. */
/*
* This program takes a kernel and the name of the special device file that
* has the mini-root file system stored on it and creates a boot tape.
* The -b option makes a bootfile that can load the kernel and mini-root
* over the network using the 'boot 6/tftp/filename -m' PROM command.
*
* usage: mkboottape [-b] tapedev vmunix minirootdev size
*/
int
main(argc, argv)
int argc;
char *argv[];
{
register int i, n;
ProcSectionHeader shdr;
struct exec aout;
long loadAddr;
long execAddr;
off_t textoff;
long length;
long rootsize;
int ifd, ofd, rfd;
int makebootfile;
int nsectors;
char block[DEV_BSIZE];
makebootfile = 0;
while ((i = getopt(argc, argv, "b")) != EOF)
switch(i) {
case 'b':
makebootfile = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 4)
usage();
if (makebootfile)
ofd = open(argv[0], O_CREAT|O_TRUNC|O_WRONLY, DEFFILEMODE);
else
ofd = open(argv[0], O_RDWR, 0);
if (ofd < 0)
deverr: err(1, "%s", argv[0]);
if ((ifd = open(argv[1], O_RDONLY, 0)) < 0)
bootferr: err(1, "%s", argv[1]);
if ((rfd = open(argv[2], O_RDONLY, 0)) < 0)
rooterr: err(1, "%s", argv[2]);
rootsize = atoi(argv[3]);
/*
* Check for exec header and skip to code segment.
*/
if (read(ifd, &aout, sizeof(aout)) != sizeof(aout) ||
aout.a_magic != OMAGIC) {
fprintf(stderr, "%s: %s: need old text format (OMAGIC) file\n",
__progname, argv[1]);
exit(1);
}
loadAddr = aout.a_entry;
execAddr = aout.a_entry;
length = aout.a_text + aout.a_data;
textoff = N_TXTOFF(aout);
(void)printf("Input file is a.out format\n");
(void)printf("load %x, start %x, len %d\n", loadAddr, execAddr, length);
/*
* Compute size of boot program rounded to page size + mini-root size.
*/
nsectors = (((length + aout.a_bss + NBPG - 1) & ~(NBPG - 1)) >>
DEV_BSHIFT) + rootsize;
if (makebootfile) {
/*
* Write the ECOFF header.
*/
dec_exec.magic = COFF_MAGIC;
dec_exec.numSections = 1;
dec_exec.optHeader = 56;
dec_exec.flags = 7;
dec_exec.aout_magic = OMAGIC;
dec_exec.verStamp = 512;
dec_exec.codeSize = nsectors << DEV_BSHIFT;
dec_exec.entry = execAddr;
dec_exec.codeStart = loadAddr;
dec_exec.heapStart = dec_exec.bssStart =
dec_exec.codeStart + aout.a_text;
if (write(ofd, (char *)&dec_exec, sizeof(dec_exec)) !=
sizeof(dec_exec))
goto deverr;
strncpy(shdr.name, ".text", sizeof(shdr.name));
shdr.physAddr = shdr.virtAddr = loadAddr;
shdr.size = dec_exec.codeSize;
shdr.sectionPtr = n =
(sizeof(dec_exec) + sizeof(shdr) + 15) & ~15;
shdr.relocPtr = 0;
shdr.lnnoPtr = 0;
shdr.numReloc = 0;
shdr.numLnno = 0;
shdr.flags = 0x20;
if (write(ofd, (char *)&shdr, sizeof(shdr)) != sizeof(shdr))
goto deverr;
n -= sizeof(dec_exec) + sizeof(shdr);
if (write(ofd, block, n) != n)
goto deverr;
} else {
/*
* Write the boot information block.
*/
decBootInfo.magic = DEC_BOOT_MAGIC;
decBootInfo.mode = 0;
decBootInfo.loadAddr = loadAddr;
decBootInfo.execAddr = execAddr;
decBootInfo.map[0].numBlocks = nsectors;
decBootInfo.map[0].startBlock = 1;
decBootInfo.map[1].numBlocks = 0;
if (write(ofd, (char *)&decBootInfo, sizeof(decBootInfo)) !=
sizeof(decBootInfo))
goto deverr;
}
/* seek to start of text */
if (lseek(ifd, textoff, SEEK_SET) < 0)
goto bootferr;
/*
* Write the remaining code to the correct place on the tape.
*/
for (i = length; i > 0; i -= n) {
n = DEV_BSIZE;
if (n > i)
n = i;
if (read(ifd, block, n) != n)
goto bootferr;
if (write(ofd, block, DEV_BSIZE) != DEV_BSIZE)
goto deverr;
}
/*
* Pad the boot file with zeros to the start of the mini-root.
*/
bzero(block, DEV_BSIZE);
i = ((nsectors - rootsize) << DEV_BSHIFT) -
((length + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1));
n = DEV_BSIZE;
for (; i > 0; i -= n) {
if (write(ofd, block, n) != n)
goto deverr;
}
/*
* Write the mini-root to tape.
*/
for (i = rootsize; i > 0; i--) {
if (read(rfd, block, DEV_BSIZE) != DEV_BSIZE)
goto rooterr;
if (write(ofd, block, DEV_BSIZE) != DEV_BSIZE)
goto deverr;
}
(void)printf("%s: wrote %d sectors\n", __progname, nsectors);
exit(0);
}
void
usage()
{
(void)fprintf(stderr,
"usage: %s [-b] tapedev vmunix minirootdev size\n", __progname);
exit(1);
}