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