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
33ELFTC_VCSID("$Id: pe_coff.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
34
35PE_CoffHdr *
36pe_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
47PE_OptHdr *
48pe_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
59PE_DataDir *
60pe_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
71int
72pe_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
103int
104pe_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
131int
132pe_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