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/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* 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 AND CONTRIBUTORS ``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 AUTHOR 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.
*
* $FreeBSD$
*/
/*
* MD primitives supporting placement of module data
*
* XXX should check load address/size against memory top.
*/
#include <stand.h>
#include "libi386.h"
#include "btxv86.h"
#define READIN_BUF (16 * 1024)
ssize_t
i386_copyin(const void *src, vm_offset_t dest, const size_t len)
{
if (dest + len >= memtop) {
errno = EFBIG;
return(-1);
}
bcopy(src, PTOV(dest), len);
return(len);
}
ssize_t
i386_copyout(const vm_offset_t src, void *dest, const size_t len)
{
if (src + len >= memtop) {
errno = EFBIG;
return(-1);
}
bcopy(PTOV(src), dest, len);
return(len);
}
ssize_t
i386_readin(const int fd, vm_offset_t dest, const size_t len)
{
void *buf;
size_t resid, chunk, get;
ssize_t got;
if (dest + len >= memtop)
return(0);
chunk = min(READIN_BUF, len);
buf = malloc(chunk);
if (buf == NULL)
return(0);
for (resid = len; resid > 0; resid -= got, dest += got) {
get = min(chunk, resid);
got = read(fd, buf, get);
if (got <= 0)
break;
bcopy(buf, PTOV(dest), (size_t)got);
}
free(buf);
return(len - resid);
}
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