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 <assert.h>
28*839529caSEd Maste #include <errno.h>
29*839529caSEd Maste #include <unistd.h>
30*839529caSEd Maste
31*839529caSEd Maste #include "_libpe.h"
32*839529caSEd Maste
33*839529caSEd Maste ELFTC_VCSID("$Id: pe_update.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
34*839529caSEd Maste
35*839529caSEd Maste off_t
pe_update(PE * pe)36*839529caSEd Maste pe_update(PE *pe)
37*839529caSEd Maste {
38*839529caSEd Maste off_t off;
39*839529caSEd Maste
40*839529caSEd Maste if (pe == NULL) {
41*839529caSEd Maste errno = EINVAL;
42*839529caSEd Maste return (-1);
43*839529caSEd Maste }
44*839529caSEd Maste
45*839529caSEd Maste if (pe->pe_cmd == PE_C_READ || pe->pe_flags & LIBPE_F_FD_DONE) {
46*839529caSEd Maste errno = EACCES;
47*839529caSEd Maste return (-1);
48*839529caSEd Maste }
49*839529caSEd Maste
50*839529caSEd Maste if (pe->pe_cmd == PE_C_RDWR || (pe->pe_cmd == PE_C_WRITE &&
51*839529caSEd Maste (pe->pe_flags & LIBPE_F_SPECIAL_FILE) == 0)) {
52*839529caSEd Maste if (lseek(pe->pe_fd, 0, SEEK_SET) < 0) {
53*839529caSEd Maste errno = EIO;
54*839529caSEd Maste return (-1);
55*839529caSEd Maste }
56*839529caSEd Maste }
57*839529caSEd Maste
58*839529caSEd Maste off = 0;
59*839529caSEd Maste
60*839529caSEd Maste if (pe->pe_obj == PE_O_PE32 || pe->pe_obj == PE_O_PE32P) {
61*839529caSEd Maste if ((off = libpe_write_msdos_stub(pe, off)) < 0)
62*839529caSEd Maste return (-1);
63*839529caSEd Maste
64*839529caSEd Maste if ((off = libpe_write_pe_header(pe, off)) < 0)
65*839529caSEd Maste return (-1);
66*839529caSEd Maste }
67*839529caSEd Maste
68*839529caSEd Maste if (libpe_resync_sections(pe, off) < 0)
69*839529caSEd Maste return (-1);
70*839529caSEd Maste
71*839529caSEd Maste if ((off = libpe_write_coff_header(pe, off)) < 0)
72*839529caSEd Maste return (-1);
73*839529caSEd Maste
74*839529caSEd Maste if ((off = libpe_write_section_headers(pe, off)) < 0)
75*839529caSEd Maste return (-1);
76*839529caSEd Maste
77*839529caSEd Maste if ((off = libpe_write_sections(pe, off)) < 0)
78*839529caSEd Maste return (-1);
79*839529caSEd Maste
80*839529caSEd Maste if (ftruncate(pe->pe_fd, off) < 0) {
81*839529caSEd Maste errno = EIO;
82*839529caSEd Maste return (-1);
83*839529caSEd Maste }
84*839529caSEd Maste
85*839529caSEd Maste return (off);
86*839529caSEd Maste }
87