91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* MD primitives supporting placement of module data
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*
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* XXX should check load address/size against memory top.
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*/
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#include <stand.h>
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#include "libi386.h"
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#include "btxv86.h"
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#define READIN_BUF (16 * 1024)
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ssize_t
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i386_copyin(const void *src, vm_offset_t dest, const size_t len)
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{
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if (dest + len >= memtop) {
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errno = EFBIG;
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return(-1);
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}
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bcopy(src, PTOV(dest), len);
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return(len);
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}
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ssize_t
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i386_copyout(const vm_offset_t src, void *dest, const size_t len)
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{
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if (src + len >= memtop) {
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errno = EFBIG;
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return(-1);
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}
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bcopy(PTOV(src), dest, len);
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return(len);
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}
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ssize_t
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i386_readin(const int fd, vm_offset_t dest, const size_t len)
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{
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void *buf;
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size_t resid, chunk, get;
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ssize_t got;
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if (dest + len >= memtop)
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return(0);
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chunk = min(READIN_BUF, len);
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buf = malloc(chunk);
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if (buf == NULL)
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return(0);
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for (resid = len; resid > 0; resid -= got, dest += got) {
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get = min(chunk, resid);
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got = read(fd, buf, get);
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if (got <= 0)
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break;
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bcopy(buf, PTOV(dest), (size_t)got);
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}
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free(buf);
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return(len - resid);
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}
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