1 /*-
2 * Copyright (c) 2015 Kai Wang
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <errno.h>
28 #include <stdlib.h>
29 #include <string.h>
30
31 #include "_libpe.h"
32
33 ELFTC_VCSID("$Id: pe_coff.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
34
35 PE_CoffHdr *
pe_coff_header(PE * pe)36 pe_coff_header(PE *pe)
37 {
38
39 if (pe->pe_ch == NULL) {
40 errno = ENOENT;
41 return (NULL);
42 }
43
44 return (pe->pe_ch);
45 }
46
47 PE_OptHdr *
pe_opt_header(PE * pe)48 pe_opt_header(PE *pe)
49 {
50
51 if (pe->pe_oh == NULL) {
52 errno = ENOENT;
53 return (NULL);
54 }
55
56 return (pe->pe_oh);
57 }
58
59 PE_DataDir *
pe_data_dir(PE * pe)60 pe_data_dir(PE *pe)
61 {
62
63 if (pe->pe_dd == NULL) {
64 errno = ENOENT;
65 return (NULL);
66 }
67
68 return (pe->pe_dd);
69 }
70
71 int
pe_update_coff_header(PE * pe,PE_CoffHdr * ch)72 pe_update_coff_header(PE *pe, PE_CoffHdr *ch)
73 {
74
75 if (pe == NULL || ch == NULL) {
76 errno = EINVAL;
77 return (-1);
78 }
79
80 if (pe->pe_cmd == PE_C_READ || pe->pe_flags & LIBPE_F_FD_DONE) {
81 errno = EACCES;
82 return (-1);
83 }
84
85 if (pe->pe_ch == NULL) {
86 if ((pe->pe_ch = malloc(sizeof(PE_CoffHdr))) == NULL) {
87 errno = ENOMEM;
88 return (-1);
89 }
90 } else {
91 /* Rewrite optional header if `optsize' field changed. */
92 if (pe->pe_ch->ch_optsize != ch->ch_optsize)
93 pe->pe_flags |= LIBPE_F_DIRTY_OPT_HEADER;
94 }
95
96 *pe->pe_ch = *ch;
97
98 pe->pe_flags |= LIBPE_F_DIRTY_COFF_HEADER;
99
100 return (0);
101 }
102
103 int
pe_update_opt_header(PE * pe,PE_OptHdr * oh)104 pe_update_opt_header(PE *pe, PE_OptHdr *oh)
105 {
106
107 if (pe == NULL || oh == NULL) {
108 errno = EINVAL;
109 return (-1);
110 }
111
112 if (pe->pe_cmd == PE_C_READ || pe->pe_flags & LIBPE_F_FD_DONE) {
113 errno = EACCES;
114 return (-1);
115 }
116
117 if (pe->pe_oh == NULL) {
118 if ((pe->pe_oh = malloc(sizeof(PE_OptHdr))) == NULL) {
119 errno = ENOMEM;
120 return (-1);
121 }
122 }
123
124 *pe->pe_oh = *oh;
125
126 pe->pe_flags |= LIBPE_F_DIRTY_OPT_HEADER;
127
128 return (0);
129 }
130
131 int
pe_update_data_dir(PE * pe,PE_DataDir * dd)132 pe_update_data_dir(PE *pe, PE_DataDir *dd)
133 {
134
135 if (pe == NULL || dd == NULL) {
136 errno = EINVAL;
137 return (-1);
138 }
139
140 if (pe->pe_cmd == PE_C_READ || pe->pe_flags & LIBPE_F_FD_DONE) {
141 errno = EACCES;
142 return (-1);
143 }
144
145 if (pe->pe_dd == NULL) {
146 if ((pe->pe_dd = malloc(sizeof(PE_DataDir))) == NULL) {
147 errno = ENOMEM;
148 return (-1);
149 }
150 }
151
152 *pe->pe_dd = *dd;
153
154 pe->pe_flags |= LIBPE_F_DIRTY_OPT_HEADER;
155
156 return (0);
157 }
158