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/* $NetBSD: boot.c,v 1.6 1995/06/28 10:22:32 jonathan Exp $ */
/*
* 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.
*
* @(#)boot.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/param.h>
#include <sys/exec.h>
#include <stand.h>
#include <pmax/stand/dec_prom.h>
#include "byteswap.h"
char line[1024];
/*
* This gets arguments from the PROM, calls other routines to open
* and load the program to boot, and then transfers execution to that
* new program.
* Argv[0] should be something like "rz(0,0,0)vmunix" on a DECstation 3100.
* Argv[0,1] should be something like "boot 5/rz0/vmunix" on a DECstation 5000.
* The argument "-a" means vmunix should do an automatic reboot.
*/
int
main(argc, argv)
int argc;
char **argv;
{
register char *cp;
int ask, entry;
#ifdef DIAGNOSTIC
extern int prom_id; /* hack, saved by standalone startup */
(*(callvec._printf))("hello, world\n");
printf ((callv == &callvec)? "No REX %x\n" : "have REX %x\n",
prom_id);
#endif
#ifdef JUSTASK
ask = 1;
#else
/* check for DS5000 boot */
if (strcmp(argv[0], "boot") == 0) {
argc--;
argv++;
}
cp = *argv;
ask = 0;
#endif /* JUSTASK */
printf("Boot: ");
if (ask) {
gets(line);
if (line[0] == '\0')
return 0;
cp = line;
argv[0] = cp;
argc = 1;
} else
printf("%s\n", cp);
entry = loadfile(cp);
if (entry == -1)
return 0;
printf("Starting at 0x%x\n\n", entry);
if (callv == &callvec)
((void (*)())entry)(argc, argv, 0, 0);
else
((void (*)())entry)(argc, argv, DEC_PROM_MAGIC, callv);
}
/*
* Open 'filename', read in program and return the entry point or -1 if error.
*/
loadfile(fname)
register char *fname;
{
register struct devices *dp;
register int fd, i, n;
struct exec aout;
if ((fd = open(fname, 0)) < 0) {
printf("open(%s) failed: %d\n", fname, errno);
goto err;
}
/* read the exec header */
i = read(fd, (char *)&aout, sizeof(aout));
if (i != sizeof(aout)) {
printf("no aout header\n");
goto cerr;
} else if ((N_GETMAGIC(aout) != OMAGIC)
&& (aout.a_midmag & 0xfff) != OMAGIC) {
printf("%s: bad magic %x\n", fname, aout.a_midmag);
goto cerr;
}
/* read the code and initialized data */
printf("Size: %d+%d", aout.a_text, aout.a_data);
#if 0
/* In an OMAGIC file, we're already there. */
if (lseek(fd, (off_t)N_TXTOFF(aout), 0) < 0) {
goto cerr;
}
#endif
i = aout.a_text + aout.a_data;
n = read(fd, (char *)aout.a_entry, i);
#ifndef SMALL
(void) close(fd);
#endif
if (n < 0) {
printf("read error %d\n", errno);
goto err;
} else if (n != i) {
printf("read() short %d bytes\n", i - n);
goto err;
}
/* kernel will zero out its own bss */
n = aout.a_bss;
printf("+%d\n", n);
return ((int)aout.a_entry);
cerr:
#ifndef SMALL
(void) close(fd);
#endif
err:
printf("Can't boot '%s'\n", fname);
return (-1);
}
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