239 lines
6.6 KiB
C
239 lines
6.6 KiB
C
/*-
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* Copyright (c) 1992 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)mkboottape.c 7.7 (Berkeley) 3/8/93
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* $Id: mkboottape.c,v 1.1.1.1 1993/10/12 03:22:44 deraadt Exp $
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*/
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/exec.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <err.h>
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#include <pmax/stand/dec_boot.h>
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#include <pmax/stand/dec_exec.h>
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void usage __P((void));
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struct Dec_DiskBoot decBootInfo;
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struct coff_exec dec_exec;
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extern char *__progname; /* Program name, from crt0. */
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/*
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* This program takes a kernel and the name of the special device file that
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* has the mini-root file system stored on it and creates a boot tape.
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* The -b option makes a bootfile that can load the kernel and mini-root
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* over the network using the 'boot 6/tftp/filename -m' PROM command.
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*
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* usage: mkboottape [-b] tapedev vmunix minirootdev size
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*/
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register int i, n;
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ProcSectionHeader shdr;
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struct exec aout;
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long loadAddr;
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long execAddr;
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off_t textoff;
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long length;
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long rootsize;
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int ifd, ofd, rfd;
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int makebootfile;
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int nsectors;
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char block[DEV_BSIZE];
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makebootfile = 0;
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while ((i = getopt(argc, argv, "b")) != EOF)
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switch(i) {
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case 'b':
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makebootfile = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 4)
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usage();
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if (makebootfile)
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ofd = open(argv[0], O_CREAT|O_TRUNC|O_WRONLY, DEFFILEMODE);
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else
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ofd = open(argv[0], O_RDWR, 0);
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if (ofd < 0)
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deverr: err(1, "%s", argv[0]);
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if ((ifd = open(argv[1], O_RDONLY, 0)) < 0)
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bootferr: err(1, "%s", argv[1]);
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if ((rfd = open(argv[2], O_RDONLY, 0)) < 0)
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rooterr: err(1, "%s", argv[2]);
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rootsize = atoi(argv[3]);
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/*
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* Check for exec header and skip to code segment.
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*/
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if (read(ifd, &aout, sizeof(aout)) != sizeof(aout) ||
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aout.a_magic != OMAGIC) {
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fprintf(stderr, "%s: %s: need old text format (OMAGIC) file\n",
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__progname, argv[1]);
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exit(1);
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}
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loadAddr = aout.a_entry;
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execAddr = aout.a_entry;
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length = aout.a_text + aout.a_data;
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textoff = N_TXTOFF(aout);
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(void)printf("Input file is a.out format\n");
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(void)printf("load %x, start %x, len %d\n", loadAddr, execAddr, length);
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/*
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* Compute size of boot program rounded to page size + mini-root size.
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*/
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nsectors = (((length + aout.a_bss + NBPG - 1) & ~(NBPG - 1)) >>
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DEV_BSHIFT) + rootsize;
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if (makebootfile) {
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/*
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* Write the ECOFF header.
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*/
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dec_exec.magic = COFF_MAGIC;
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dec_exec.numSections = 1;
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dec_exec.optHeader = 56;
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dec_exec.flags = 7;
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dec_exec.aout_magic = OMAGIC;
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dec_exec.verStamp = 512;
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dec_exec.codeSize = nsectors << DEV_BSHIFT;
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dec_exec.entry = execAddr;
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dec_exec.codeStart = loadAddr;
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dec_exec.heapStart = dec_exec.bssStart =
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dec_exec.codeStart + aout.a_text;
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if (write(ofd, (char *)&dec_exec, sizeof(dec_exec)) !=
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sizeof(dec_exec))
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goto deverr;
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strncpy(shdr.name, ".text", sizeof(shdr.name));
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shdr.physAddr = shdr.virtAddr = loadAddr;
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shdr.size = dec_exec.codeSize;
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shdr.sectionPtr = n =
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(sizeof(dec_exec) + sizeof(shdr) + 15) & ~15;
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shdr.relocPtr = 0;
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shdr.lnnoPtr = 0;
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shdr.numReloc = 0;
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shdr.numLnno = 0;
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shdr.flags = 0x20;
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if (write(ofd, (char *)&shdr, sizeof(shdr)) != sizeof(shdr))
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goto deverr;
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n -= sizeof(dec_exec) + sizeof(shdr);
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if (write(ofd, block, n) != n)
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goto deverr;
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} else {
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/*
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* Write the boot information block.
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*/
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decBootInfo.magic = DEC_BOOT_MAGIC;
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decBootInfo.mode = 0;
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decBootInfo.loadAddr = loadAddr;
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decBootInfo.execAddr = execAddr;
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decBootInfo.map[0].numBlocks = nsectors;
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decBootInfo.map[0].startBlock = 1;
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decBootInfo.map[1].numBlocks = 0;
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if (write(ofd, (char *)&decBootInfo, sizeof(decBootInfo)) !=
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sizeof(decBootInfo))
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goto deverr;
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}
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/* seek to start of text */
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if (lseek(ifd, textoff, SEEK_SET) < 0)
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goto bootferr;
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/*
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* Write the remaining code to the correct place on the tape.
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*/
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for (i = length; i > 0; i -= n) {
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n = DEV_BSIZE;
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if (n > i)
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n = i;
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if (read(ifd, block, n) != n)
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goto bootferr;
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if (write(ofd, block, DEV_BSIZE) != DEV_BSIZE)
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goto deverr;
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}
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/*
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* Pad the boot file with zeros to the start of the mini-root.
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*/
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bzero(block, DEV_BSIZE);
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i = ((nsectors - rootsize) << DEV_BSHIFT) -
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((length + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1));
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n = DEV_BSIZE;
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for (; i > 0; i -= n) {
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if (write(ofd, block, n) != n)
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goto deverr;
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}
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/*
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* Write the mini-root to tape.
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*/
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for (i = rootsize; i > 0; i--) {
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if (read(rfd, block, DEV_BSIZE) != DEV_BSIZE)
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goto rooterr;
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if (write(ofd, block, DEV_BSIZE) != DEV_BSIZE)
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goto deverr;
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}
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(void)printf("%s: wrote %d sectors\n", __progname, nsectors);
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exit(0);
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}
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void
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usage()
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{
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(void)fprintf(stderr,
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"usage: %s [-b] tapedev vmunix minirootdev size\n", __progname);
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exit(1);
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}
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