getkerninfo skipped defaults ``dupedkeyed'' behind the root node;

[unix-history] / usr / src / sys / i386 / stand / bootxx.c

/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* %sccs.include.noredist.c%
*
*      @(#)bootxx.c    7.1 (Berkeley) %G%
*/

#include "../h/param.h"
#include "../h/inode.h"
#include "../h/fs.h"
#include <a.out.h>
#include "saio.h"
#include "../h/reboot.h"
#include "../h/dir.h"
#include "../h/disk.h"
#include "devvm.h"

extern  int howto, bootdev, unit, cyloffset, boottype;
extern char bootprog[] ;
/*
* Boot program... arguments passed in r10 and r11
* are passed through to the full boot program.
*/

main()
{
       register int io, partition; register char *bp ;

#ifdef lint
       howto = 0; devtype = 0;
#endif
       extern struct disklabel disklabel;

       /* are we a disk, if so look at disklabel and do things */
       if (bootdev == 0 || bootdev == 3) {
           /*
            * Synthesize bootdev from unit, type and partition
            * from the ROM monitor.
            * It's dirty work, but someone's got to do it, and
            * we always seem to get it.
            */
           for (io = 0; io < 8; io++)
               if (bootdev > 0) { /* XXX should check dk_type == DTYPE_SCSI */
                       if (disklabel.dk_partition[io].cyloff
                               == cyloffset * disklabel.dk_secpercyl)
                               break;
               } else {
       
                       if (disklabel.dk_partition[io].cyloff == cyloffset)
                       break;
               }
           if (io == 8) io = 0; /* probably a bad or non-existant disklabel */
           bootdev = makedev(bootdev, make_minor(unit, io));
       } else { io = 0 ; howto = (howto&0x7) | 3 ; }
       bp = bootprog ;
       while (*bp != '0') bp++ ;       /* n-char device names instead of 2 */
       *bp++ = unit % 10 + '0' ;
       *bp += io % 10 ;
/*      bootprog[3] = unit % 10 + '0';
       bootprog[4] = io % 10 + 'a';*/
       printf("loading %s\n", bootprog);
       io = open(bootprog, 0);
       if (io >= 0)
               copyunix(io);
       _stop("boot failed\n");
}

/*ARGSUSED*/
copyunix(io)
       register io;    
{
       struct exec x;
       register int i;
       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");
       if ((x.a_magic == 0413 || x.a_magic == 0410) &&
           lseek(io, 0x400, 0) == -1)
               goto shread;
       if (read(io, (char *)0, x.a_text) != x.a_text)
               goto shread;
       addr = (char *)x.a_text;
       if (x.a_magic == 0413 || x.a_magic == 0410)
               while ((int)addr & CLOFSET)
                       *addr++ = 0;
       if (read(io, addr, x.a_data) != x.a_data)
               goto shread;
       addr += x.a_data;
       x.a_bss += 128*512;     /* slop */
       for (i = 0; i < x.a_bss; i++)
               *addr++ = 0;
       setregs();
       (*((int (*)()) x.a_entry))();
       return;
shread:
       _stop("Short read\n");
}