1*839529caSEd Maste /*-
2*839529caSEd Maste * Copyright (c) 2016 Kai Wang
3*839529caSEd Maste * All rights reserved.
4*839529caSEd Maste *
5*839529caSEd Maste * Redistribution and use in source and binary forms, with or without
6*839529caSEd Maste * modification, are permitted provided that the following conditions
7*839529caSEd Maste * are met:
8*839529caSEd Maste * 1. Redistributions of source code must retain the above copyright
9*839529caSEd Maste * notice, this list of conditions and the following disclaimer.
10*839529caSEd Maste * 2. Redistributions in binary form must reproduce the above copyright
11*839529caSEd Maste * notice, this list of conditions and the following disclaimer in the
12*839529caSEd Maste * documentation and/or other materials provided with the distribution.
13*839529caSEd Maste *
14*839529caSEd Maste * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15*839529caSEd Maste * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16*839529caSEd Maste * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17*839529caSEd Maste * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18*839529caSEd Maste * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19*839529caSEd Maste * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20*839529caSEd Maste * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21*839529caSEd Maste * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22*839529caSEd Maste * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23*839529caSEd Maste * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24*839529caSEd Maste * SUCH DAMAGE.
25*839529caSEd Maste */
26*839529caSEd Maste
27*839529caSEd Maste #include <sys/param.h>
28*839529caSEd Maste #include <assert.h>
29*839529caSEd Maste #include <errno.h>
30*839529caSEd Maste #include <string.h>
31*839529caSEd Maste #include <unistd.h>
32*839529caSEd Maste
33*839529caSEd Maste #include "_libpe.h"
34*839529caSEd Maste
35*839529caSEd Maste ELFTC_VCSID("$Id: libpe_utils.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
36*839529caSEd Maste
37*839529caSEd Maste off_t
libpe_align(PE * pe,off_t off,size_t align)38*839529caSEd Maste libpe_align(PE *pe, off_t off, size_t align)
39*839529caSEd Maste {
40*839529caSEd Maste off_t n;
41*839529caSEd Maste
42*839529caSEd Maste assert(align > 0 && (align & (align - 1)) == 0);
43*839529caSEd Maste
44*839529caSEd Maste n = roundup(off, align);
45*839529caSEd Maste if (n > off) {
46*839529caSEd Maste if (libpe_pad(pe, n - off) < 0)
47*839529caSEd Maste return (-1);
48*839529caSEd Maste }
49*839529caSEd Maste
50*839529caSEd Maste return (n);
51*839529caSEd Maste }
52*839529caSEd Maste
53*839529caSEd Maste int
libpe_pad(PE * pe,size_t pad)54*839529caSEd Maste libpe_pad(PE *pe, size_t pad)
55*839529caSEd Maste {
56*839529caSEd Maste char tmp[128];
57*839529caSEd Maste size_t s;
58*839529caSEd Maste
59*839529caSEd Maste memset(tmp, 0, sizeof(tmp));
60*839529caSEd Maste for (; pad > 0; pad -= s) {
61*839529caSEd Maste s = pad > sizeof(tmp) ? sizeof(tmp) : pad;
62*839529caSEd Maste if (write(pe->pe_fd, tmp, s) != (ssize_t) s) {
63*839529caSEd Maste errno = EIO;
64*839529caSEd Maste return (-1);
65*839529caSEd Maste }
66*839529caSEd Maste }
67*839529caSEd Maste
68*839529caSEd Maste return (0);
69*839529caSEd Maste }
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