NetBSD/sys/arch/hp300/stand/boot.c

182 lines
5.0 KiB
C

/*-
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. 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 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.
*
* from: @(#)boot.c 8.1 (Berkeley) 6/10/93
*
* $Id: boot.c,v 1.3 1994/01/26 02:38:19 brezak Exp $
*/
#include <sys/param.h>
#include <sys/reboot.h>
#include <a.out.h>
#include "stand.h"
#ifndef INSECURE
#include <sys/stat.h>
struct stat sb;
#endif
/*
* Boot program... bits in `howto' determine whether boot stops to
* ask for system name. Boot device is derived from ROM provided
* information.
*/
char line[100];
char *ssym, *esym;
extern unsigned opendev;
extern char *lowram;
extern int noconsole;
extern int howto, bootdev;
main()
{
int io, retry, type;
printf("%s CPU\nBoot\n", getmachineid());
#ifdef JUSTASK
howto = RB_ASKNAME|RB_SINGLE;
#else
if ((howto & RB_ASKNAME) == 0) {
type = (bootdev >> B_TYPESHIFT) & B_TYPEMASK;
if ((unsigned)type < ndevs && devsw[type].dv_name)
strcpy(line, "/netbsd");
else
howto |= RB_SINGLE|RB_ASKNAME;
}
#endif
for (retry = 0;;) {
if (!noconsole && (howto & RB_ASKNAME)) {
printf(": ");
gets(line);
if (line[0] == 0) {
strcpy(line, "/netbsd");
printf(": %s\n", line);
}
} else
printf(": %s\n", line);
io = open(line, 0);
if (io >= 0) {
#ifndef INSECURE
(void) fstat(io, &sb);
if (sb.st_uid || (sb.st_mode & 2)) {
printf("non-secure file, will not load\n");
close(io);
howto = RB_SINGLE|RB_ASKNAME;
continue;
}
#endif
copyunix(howto, opendev, io);
close(io);
howto |= RB_SINGLE|RB_ASKNAME;
}
if (++retry > 2)
howto |= RB_SINGLE|RB_ASKNAME;
}
}
/*ARGSUSED*/
copyunix(howto, devtype, io)
register int howto; /* d7 contains boot flags */
register u_int devtype; /* d6 contains boot device */
register int io;
{
struct exec x;
int i;
register char *load; /* a5 contains load addr for unix */
register char *addr;
i = read(io, (char *)&x, sizeof(x));
if (i != sizeof(x) ||
N_BADMAG(x)) {
printf("Bad format\n");
return;
}
printf("%d", x.a_text);
if (N_GETMAGIC(x) == ZMAGIC && lseek(io, 0x400, SEEK_SET) == -1)
goto shread;
load = addr = lowram;
if (read(io, (char *)addr, x.a_text) != x.a_text)
goto shread;
addr += x.a_text;
if (N_GETMAGIC(x) == ZMAGIC || N_GETMAGIC(x) == NMAGIC)
while ((int)addr & CLOFSET)
*addr++ = 0;
printf("+%d", x.a_data);
if (read(io, addr, x.a_data) != x.a_data)
goto shread;
addr += x.a_data;
printf("+%d", x.a_bss);
for (i = 0; i < x.a_bss; i++)
*addr++ = 0;
ssym = addr;
bcopy(&x.a_syms, addr, sizeof(x.a_syms));
addr += sizeof(x.a_syms);
printf(" [%d+", x.a_syms);
if (read(io, addr, x.a_syms) != x.a_syms)
goto shread;
addr += x.a_syms;
if (read(io, &i, sizeof(int)) != sizeof(int))
goto shread;
bcopy(&i, addr, sizeof(int));
if (i) {
i -= sizeof(int);
addr += sizeof(int);
if (read(io, addr, i) != i)
goto shread;
addr += i;
}
printf("%d] ", i);
#define round_to_size(x) \
(((int)(x) + sizeof(int) - 1) & ~(sizeof(int) - 1))
esym = (char *)round_to_size(addr - lowram);
#undef round_to_size
x.a_entry += (int)lowram;
printf(" start 0x%x\n", x.a_entry);
#ifdef __GNUC__
asm(" movl %0,d7" : : "m" (howto));
asm(" movl %0,d6" : : "m" (devtype));
asm(" movl %0,a5" : : "a" (load));
asm(" movl %0,a4" : : "a" (esym));
#endif
(*((int (*)()) x.a_entry))();
return;
shread:
printf("Short read\n");
return;
}