Return to bootxx.c CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / sys / vaxstand

Annotation of 43BSDTahoe/sys/vaxstand/bootxx.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)bootxx.c    7.4 (Berkeley) 2/4/88
        !             7:  */
        !             8: 
        !             9: #include "param.h"
        !            10: #include "inode.h"
        !            11: #include "fs.h"
        !            12: #include "vm.h"
        !            13: #include "reboot.h"
        !            14: #include <a.out.h>
        !            15: #include "saio.h"
        !            16: 
        !            17: char bootprog[] = "boot";
        !            18: extern unsigned opendev;
        !            19: 
        !            20: /*
        !            21:  * Boot program... arguments passed in r10 and r11
        !            22:  * are passed through to the full boot program.
        !            23:  */
        !            24: 
        !            25: main()
        !            26: {
        !            27:        register unsigned howto, devtype;       /* howto=r11, devtype=r10 */
        !            28:        int io, unit, partition;
        !            29:        register char *cp;
        !            30: 
        !            31: #ifdef lint
        !            32:        howto = 0; devtype = 0; devtype = devtype;
        !            33: #endif
        !            34:        printf("loading %s\n", bootprog);
        !            35:        io = open(bootprog, 0);
        !            36:        if (io >= 0)
        !            37:                copyunix(howto, opendev, io);
        !            38:        _stop("boot failed\n");
        !            39: }
        !            40: 
        !            41: /*ARGSUSED*/
        !            42: copyunix(howto, devtype, io)
        !            43:        register howto, devtype, io;    /* howto=r11, devtype=r10 */
        !            44: {
        !            45:        struct exec x;
        !            46:        register int i;
        !            47:        char *addr;
        !            48: 
        !            49:        i = read(io, (char *)&x, sizeof x);
        !            50:        if (i != sizeof x || N_BADMAG(x))
        !            51:                _stop("Bad format\n");
        !            52:        if ((x.a_magic == ZMAGIC || x.a_magic == NMAGIC) &&
        !            53:            lseek(io, 0x400, L_SET) == -1)
        !            54:                goto shread;
        !            55:        if (read(io, (char *)0, x.a_text) != x.a_text)
        !            56:                goto shread;
        !            57:        addr = (char *)x.a_text;
        !            58:        if (x.a_magic == ZMAGIC || x.a_magic == NMAGIC)
        !            59:                while ((int)addr & CLOFSET)
        !            60:                        *addr++ = 0;
        !            61:        if (read(io, addr, x.a_data) != x.a_data)
        !            62:                goto shread;
        !            63:        addr += x.a_data;
        !            64:        x.a_bss += 128*512;     /* slop */
        !            65:        for (i = 0; i < x.a_bss; i++)
        !            66:                *addr++ = 0;
        !            67:        x.a_entry &= 0x7fffffff;
        !            68:        (*((int (*)()) x.a_entry))();
        !            69:        return;
        !            70: shread:
        !            71:        _stop("Short read\n");
        !            72: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.