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Annotation of sys/stand/boot/bootarg.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: bootarg.c,v 1.10 2003/08/11 06:23:07 deraadt Exp $    */
                      2:
                      3: /*
                      4:  * Copyright (c) 1997,1998 Michael Shalayeff
                      5:  * All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  *
                     16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     17:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
                     18:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     19:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     20:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     21:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     22:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     23:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     24:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     25:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     26:  * SUCH DAMAGE.
                     27:  *
                     28:  */
                     29:
                     30: #include <lib/libsa/stand.h>
                     31: #include <stand/boot/bootarg.h>
                     32:
                     33: bootarg_t *bootarg_list;
                     34:
                     35: void
                     36: addbootarg(int t, size_t l, void *p)
                     37: {
                     38:        bootarg_t *q = alloc(sizeof(*q) + l - sizeof(q->ba_arg));
                     39:
                     40:        q->ba_type = t;
                     41:        q->ba_size = sizeof(*q) + l - sizeof(q->ba_arg);
                     42:        bcopy(p, q->ba_arg, l);
                     43:        q->ba_next = bootarg_list;
                     44:        bootarg_list = q;
                     45: }
                     46:
                     47: void
                     48: makebootargs(caddr_t v, size_t *lenp)
                     49: {
                     50:        bootarg_t *p;
                     51:        u_char *q;
                     52:        size_t l;
                     53:
                     54:        /* get total size */
                     55:        l = sizeof(*p);
                     56:        for (p = bootarg_list; p != NULL; p = p->ba_next)
                     57:                l += p->ba_size;
                     58:        if (*lenp < l) {
                     59: #ifdef DEBUG
                     60:                printf("makebootargs: too many args\n");
                     61: #endif
                     62:                l = *lenp;
                     63:        }
                     64:        *lenp = l;
                     65:        /* copy them out */
                     66:        for (p = bootarg_list, q = v;
                     67:             p != NULL && ((q + p->ba_size) - (u_char *)v) < l;
                     68:             q += p->ba_size, p = p->ba_next) {
                     69: #ifdef DEBUG
                     70:                printf("%d,%d ", p->ba_type, p->ba_size);
                     71: #endif
                     72:                bcopy(p, q, p->ba_size);
                     73:        }
                     74:        p = (bootarg_t *)q;
                     75:        p->ba_type = BOOTARG_END;
                     76: }
                     77: