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/* $OpenBSD: bootarg.c,v 1.12 2015/09/02 01:52:26 yasuoka Exp $ */
/*
* Copyright (c) 1997,1998 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <lib/libsa/stand.h>
#include <stand/boot/bootarg.h>
static bootarg_t *bootarg_list;
void
addbootarg(int t, size_t l, void *p)
{
bootarg_t *q = alloc(sizeof(*q) + l - sizeof(q->ba_arg));
q->ba_type = t;
q->ba_size = sizeof(*q) + l - sizeof(q->ba_arg);
bcopy(p, q->ba_arg, l);
q->ba_next = bootarg_list;
bootarg_list = q;
}
void
makebootargs(caddr_t v, size_t *lenp)
{
bootarg_t *p;
u_char *q;
size_t l;
/* get total size */
l = sizeof(*p);
for (p = bootarg_list; p != NULL; p = p->ba_next) {
l += p->ba_size;
if (*lenp < l) {
#ifdef DEBUG
printf("makebootargs: too many args\n");
#endif
l -= p->ba_size;
break;
}
}
*lenp = l;
/* copy them out */
for (p = bootarg_list, q = v;
p != NULL && ((q + p->ba_size) - (u_char *)v) <= l - sizeof(*p);
q += p->ba_size, p = p->ba_next) {
#ifdef DEBUG
printf("%d,%d ", p->ba_type, p->ba_size);
#endif
bcopy(p, q, p->ba_size);
}
p = (bootarg_t *)q;
p->ba_type = BOOTARG_END;
}
void
makebootargs32(caddr_t v, size_t *lenp)
{
bootarg_t *p;
u_char *q;
size_t l;
size_t adj;
struct bootarg32 {
int ba_type;
int ba_size;
int ba_nextX;
char ba_arg[1];
} *p32;
adj = (ssize_t)sizeof(struct bootarg32) - sizeof(bootarg_t);
/* get total size */
l = sizeof(*p32);
for (p = bootarg_list; p != NULL; p = p->ba_next) {
l += p->ba_size + adj;
if (*lenp < l) {
#ifdef DEBUG
printf("makebootargs: too many args\n");
#endif
l -= p->ba_size + adj;
break;
}
}
*lenp = l;
/* copy them out */
for (p = bootarg_list, q = v; p != NULL; p = p->ba_next) {
if (q + p->ba_size + adj > (u_char *)v + l - sizeof(*p32))
break;
p32 = (struct bootarg32 *)q;
p32->ba_type = p->ba_type;
p32->ba_size = p->ba_size + adj;
bcopy(p->ba_arg, p32->ba_arg,
p->ba_size - (sizeof(*p) - sizeof(p->ba_arg)));
#ifdef DEBUG
printf("%d,%d ", p->ba_type, p->ba_size);
#endif
q += p32->ba_size;
}
p32 = (struct bootarg32 *)q;
p32->ba_type = BOOTARG_END;
}
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