74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/*-
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* Copyright (c) 2011 Google, Inc.
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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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*
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.h>
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#include "libuserboot.h"
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ssize_t
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userboot_copyin(const void *src, vm_offset_t va, size_t len)
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{
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CALLBACK(copyin, src, va, len);
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return (len);
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}
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ssize_t
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userboot_copyout(vm_offset_t va, void *dst, size_t len)
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{
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CALLBACK(copyout, va, dst, len);
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return (len);
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}
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ssize_t
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userboot_readin(int fd, vm_offset_t va, size_t len)
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{
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ssize_t res, s;
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size_t sz;
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char buf[4096];
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res = 0;
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while (len > 0) {
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sz = len;
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if (sz > sizeof(buf))
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sz = sizeof(buf);
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s = read(fd, buf, sz);
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if (s == 0)
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break;
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if (s < 0)
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return (s);
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CALLBACK(copyin, buf, va, s);
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len -= s;
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res += s;
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va += s;
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}
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return (res);
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}
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