4.3BSD-Reno/src/sys/hpstand/boot.c
/*
* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution is only permitted until one year after the first shipment
* of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
* binary forms are permitted provided that: (1) source distributions retain
* this entire copyright notice and comment, and (2) distributions including
* binaries display the following acknowledgement: This product includes
* software developed by the University of California, Berkeley and its
* contributors'' in the documentation or other materials provided with the
* distribution and in all advertising materials mentioning features or use
* of this software. 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 AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* @(#)boot.c 7.1 (Berkeley) 5/8/90
*/
#include <a.out.h>
#include "saio.h"
#include "../sys/reboot.h"
#ifndef INSECURE
#include "../sys/stat.h"
struct stat sb;
#endif
#define B_MAKEDEV(a,u,p,t) \
(((a) << B_ADAPTORSHIFT) | ((u) << B_UNITSHIFT) | \
((p) << B_PARTITIONSHIFT) | ((t) << B_TYPESHIFT))
/*
* Boot program... arguments in `devtype' and `howto' determine
* whether boot stops to ask for system name and which device
* boot comes from.
*/
/* Types in `devtype' specifying major device */
char devname[][2] = {
0,0, /* 0 = ct */
0,0, /* 1 = fd */
'r','d', /* 2 = rd */
0,0, /* 3 = sw */
's','d', /* 4 = sd */
};
#define MAXTYPE (sizeof(devname) / sizeof(devname[0]))
#define UNIX "vmunix"
char line[100];
int retry = 0;
extern char *lowram;
extern int noconsole;
extern int howto, devtype;
#define MSUS (0xfffffedc)
char rom2mdev[] = {
0, /* 0 - none */
0, /* 1 - none */
0, /* 2 - none */
0, /* 3 - none */
0, /* 4 - none */
0, /* 5 - none */
0, /* 6 - none */
0, /* 7 - none */
0, /* 8 - none */
0, /* 9 - none */
0, /* 10 - none */
0, /* 11 - none */
0, /* 12 - none */
0, /* 13 - none */
4, /* 14 - SCSI disk */
0, /* 15 - none */
2, /* 16 - CS/80 device on HPIB */
2, /* 17 - CS/80 device on HPIB */
0, /* 18 - none */
0, /* 19 - none */
0, /* 20 - none */
0, /* 21 - none */
0, /* 22 - none */
0, /* 23 - none */
0, /* 24 - none */
0, /* 25 - none */
0, /* 26 - none */
0, /* 27 - none */
0, /* 28 - none */
0, /* 29 - none */
0, /* 30 - none */
0, /* 31 - none */
};
main()
{
register type, part, unit, io;
register char *cp;
printf("\nBoot\n");
#ifdef JUSTASK
howto = RB_ASKNAME|RB_SINGLE;
#else
type = (devtype >> B_TYPESHIFT) & B_TYPEMASK;
unit = (devtype >> B_UNITSHIFT) & B_UNITMASK;
unit += 8 * ((devtype >> B_ADAPTORSHIFT) & B_ADAPTORMASK);
part = (devtype >> B_PARTITIONSHIFT) & B_PARTITIONMASK;
if ((howto & RB_ASKNAME) == 0) {
if ((devtype & B_MAGICMASK) != B_DEVMAGIC) {
/*
* we have to map the ROM device type codes
* to Unix major device numbers.
*/
type = rom2mdev[*(char *)MSUS & 0x1f];
devtype = (devtype &~ (B_TYPEMASK << B_TYPESHIFT))
| (type << B_TYPESHIFT);
}
if (type >= 0 && type <= MAXTYPE && devname[type][0]) {
cp = line;
*cp++ = devname[type][0];
*cp++ = devname[type][1];
*cp++ = '(';
if (unit >= 10)
*cp++ = unit / 10 + '0';
*cp++ = unit % 10 + '0';
*cp++ = ',';
*cp++ = part + '0';
*cp++ = ')';
strcpy(cp, UNIX);
} else
howto = RB_SINGLE|RB_ASKNAME;
}
#endif
for (;;) {
if (!noconsole && (howto & RB_ASKNAME)) {
printf(": ");
gets(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");
howto = RB_SINGLE|RB_ASKNAME;
continue;
}
#endif
if (howto & RB_ASKNAME) {
/*
* Build up devtype register to pass on to
* booted program.
*/
cp = line;
for (type = 0; type <= MAXTYPE; type++)
if ((devname[type][0] == cp[0]) &&
(devname[type][1] == cp[1]))
break;
if (type <= MAXTYPE) {
cp += 3;
unit = *cp++ - '0';
if (*cp >= '0' && *cp <= '9')
unit = unit * 10 + *cp++ - '0';
cp++;
part = atol(cp);
devtype = B_MAKEDEV(unit >> 3, unit & 7, part, type);
}
}
devtype |= B_DEVMAGIC;
copyunix(howto, devtype, io);
close(io);
howto = RB_SINGLE|RB_ASKNAME;
}
bad:
if (++retry > 2)
howto = RB_SINGLE|RB_ASKNAME;
}
}
/*ARGSUSED*/
copyunix(howto, devtype, io)
register howto; /* d7 contains boot flags */
register devtype; /* d6 contains boot device */
register io;
{
struct exec x;
register 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 ||
(x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410))
_stop("Bad format\n");
printf("%d", x.a_text);
if (x.a_magic == 0413 && lseek(io, 0x400, 0) == -1)
goto shread;
load = addr = lowram;
if (read(io, (char *)addr, x.a_text) != x.a_text)
goto shread;
addr += x.a_text;
if (x.a_magic == 0413 || x.a_magic == 0410)
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);
x.a_bss += 128*512; /* slop */
for (i = 0; i < x.a_bss; i++)
*addr++ = 0;
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));
#endif
(*((int (*)()) x.a_entry))();
exit();
shread:
_stop("Short read\n");
}