1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/*
* cbfstool
*
* Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*/
#include <string.h>
#include "cbfstool.h"
struct cbfs_file *rom_find(struct rom *rom, unsigned int offset)
{
while (offset < rom->fssize) {
struct cbfs_file *c =
(struct cbfs_file *)ROM_PTR(rom, offset);
if (!strcmp(c->magic, COMPONENT_MAGIC))
return c;
offset += ntohl(rom->header->align);
}
return NULL;
}
struct cbfs_file *rom_find_first(struct rom *rom)
{
return rom_find(rom, ntohl(rom->header->offset));
}
struct cbfs_file *rom_find_next(struct rom *rom, struct cbfs_file *prev)
{
unsigned int offset = ROM_OFFSET(rom, prev);
return rom_find(rom, offset +
ALIGN(ntohl(prev->offset) + ntohl(prev->len),
ntohl(rom->header->align)));
}
struct cbfs_file *rom_find_empty(struct rom *rom)
{
unsigned int offset = ntohl(rom->header->offset);
unsigned int ret = ntohl(rom->header->offset);
while (offset < rom->fssize) {
struct cbfs_file *c =
(struct cbfs_file *)ROM_PTR(rom, offset);
if (!strcmp(c->magic, COMPONENT_MAGIC)) {
offset += ALIGN(ntohl(c->offset) + ntohl(c->len),
ntohl(rom->header->align));
ret = offset;
} else
offset += ntohl(rom->header->align);
}
return (ret < rom->fssize) ?
(struct cbfs_file *)ROM_PTR(rom, ret) : NULL;
}
struct cbfs_file *rom_find_by_name(struct rom *rom, const char *name)
{
struct cbfs_file *c = rom_find_first(rom);
while (c) {
if (!strcmp((char *)CBFS_NAME(c), name))
return c;
c = rom_find_next(rom, c);
}
return NULL;
}
unsigned int rom_used_space(struct rom *rom)
{
struct cbfs_file *c = rom_find_first(rom);
unsigned int ret = 0;
while (c) {
ret = ROM_OFFSET(rom, c) + ntohl(c->offset) + ntohl(c->len);
c = rom_find_next(rom, c);
}
return ret;
}
int rom_remove(struct rom *rom, const char *name)
{
struct cbfs_file *c = rom_find_by_name(rom, name);
struct cbfs_file *n;
int clear;
if (c == NULL) {
ERROR("Component %s does not exist\n", name);
return -1;
}
/* Get the next component - and copy it into the current
space */
n = rom_find_next(rom, c);
memcpy(c, n, rom->fssize - ROM_OFFSET(rom, n));
clear = ROM_OFFSET(rom, n) - ROM_OFFSET(rom, c);
/* Zero the new space */
memset(ROM_PTR(rom, rom->fssize - clear), 0, clear);
return 0;
}
int rom_add(struct rom *rom, const char *name, void *buffer, int size, int type)
{
struct cbfs_file *c = rom_find_empty(rom);
unsigned int offset;
unsigned int csize;
if (rom_find_by_name(rom, name)) {
ERROR("Component %s already exists in this rom\n", name);
return -1;
}
if (c == NULL) {
ERROR("There is no more room in this ROM\n");
return -1;
}
csize = sizeof(struct cbfs_file) + ALIGN(strlen(name), 16) + size;
offset = ROM_OFFSET(rom, c);
if (offset + csize >= rom->fssize) {
ERROR("There is not enough room in this ROM for this\n");
ERROR("component. I need %d bytes, only have %d bytes avail\n",
csize, rom->fssize - offset);
return -1;
}
strcpy(c->magic, COMPONENT_MAGIC);
csize = sizeof(struct cbfs_file) + ALIGN(strlen(name) + 1, 16);
c->len = htonl(size);
c->offset = htonl(csize);
c->type = htonl(type);
memset(CBFS_NAME(c), 0, ALIGN(strlen(name) + 1, 16));
strcpy((char *)CBFS_NAME(c), name);
memcpy(((unsigned char *)c) + csize, buffer, size);
return 0;
}
|
