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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2017 Konsulko Group Inc. All rights reserved.
*
* Author:
* Pantelis Antoniou <pantelis.antoniou@konsulko.com>
*/
#include <assert.h>
#include <ctype.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <libfdt.h>
#include "util.h"
#define BUF_INCREMENT 65536
/* Usage related data. */
static const char usage_synopsis[] =
"apply a number of overlays to a base blob\n"
" fdtoverlay <options> [<overlay.dtbo> [<overlay.dtbo>]]";
static const char usage_short_opts[] = "i:o:v" USAGE_COMMON_SHORT_OPTS;
static struct option const usage_long_opts[] = {
{"input", required_argument, NULL, 'i'},
{"output", required_argument, NULL, 'o'},
{"verbose", no_argument, NULL, 'v'},
USAGE_COMMON_LONG_OPTS,
};
static const char * const usage_opts_help[] = {
"Input base DT blob",
"Output DT blob",
"Verbose messages",
USAGE_COMMON_OPTS_HELP
};
int verbose = 0;
static void *apply_one(char *base, const char *overlay, size_t *buf_len,
const char *name)
{
char *tmp = NULL;
char *tmpo;
int ret;
/*
* We take a copies first, because a failed apply can trash
* both the base blob and the overlay
*/
tmpo = xmalloc(fdt_totalsize(overlay));
do {
tmp = xrealloc(tmp, *buf_len);
ret = fdt_open_into(base, tmp, *buf_len);
if (ret) {
fprintf(stderr,
"\nFailed to make temporary copy: %s\n",
fdt_strerror(ret));
goto fail;
}
memcpy(tmpo, overlay, fdt_totalsize(overlay));
ret = fdt_overlay_apply(tmp, tmpo);
if (ret == -FDT_ERR_NOSPACE) {
*buf_len += BUF_INCREMENT;
}
} while (ret == -FDT_ERR_NOSPACE);
if (ret) {
fprintf(stderr, "\nFailed to apply '%s': %s\n",
name, fdt_strerror(ret));
goto fail;
}
free(base);
free(tmpo);
return tmp;
fail:
free(tmpo);
if (tmp)
free(tmp);
return NULL;
}
static int do_fdtoverlay(const char *input_filename,
const char *output_filename,
int argc, char *argv[])
{
char *blob = NULL;
char **ovblob = NULL;
size_t buf_len;
int i, ret = -1;
blob = utilfdt_read(input_filename, &buf_len);
if (!blob) {
fprintf(stderr, "\nFailed to read '%s'\n", input_filename);
goto out_err;
}
if (fdt_totalsize(blob) > buf_len) {
fprintf(stderr,
"\nBase blob is incomplete (%lu / %" PRIu32 " bytes read)\n",
(unsigned long)buf_len, fdt_totalsize(blob));
goto out_err;
}
/* allocate blob pointer array */
ovblob = xmalloc(sizeof(*ovblob) * argc);
memset(ovblob, 0, sizeof(*ovblob) * argc);
/* read and keep track of the overlay blobs */
for (i = 0; i < argc; i++) {
size_t ov_len;
ovblob[i] = utilfdt_read(argv[i], &ov_len);
if (!ovblob[i]) {
fprintf(stderr, "\nFailed to read '%s'\n", argv[i]);
goto out_err;
}
if (fdt_totalsize(ovblob[i]) > ov_len) {
fprintf(stderr,
"\nOverlay '%s' is incomplete (%lu / %" PRIu32 " bytes read)\n",
argv[i], (unsigned long)ov_len,
fdt_totalsize(ovblob[i]));
goto out_err;
}
}
buf_len = fdt_totalsize(blob);
/* apply the overlays in sequence */
for (i = 0; i < argc; i++) {
blob = apply_one(blob, ovblob[i], &buf_len, argv[i]);
if (!blob)
goto out_err;
}
fdt_pack(blob);
ret = utilfdt_write(output_filename, blob);
if (ret)
fprintf(stderr, "\nFailed to write '%s'\n",
output_filename);
out_err:
if (ovblob) {
for (i = 0; i < argc; i++) {
if (ovblob[i])
free(ovblob[i]);
}
free(ovblob);
}
free(blob);
return ret;
}
int main(int argc, char *argv[])
{
int opt, i;
char *input_filename = NULL;
char *output_filename = NULL;
while ((opt = util_getopt_long()) != EOF) {
switch (opt) {
case_USAGE_COMMON_FLAGS
case 'i':
input_filename = optarg;
break;
case 'o':
output_filename = optarg;
break;
case 'v':
verbose = 1;
break;
}
}
if (!input_filename)
usage("missing input file");
if (!output_filename)
usage("missing output file");
argv += optind;
argc -= optind;
if (argc <= 0)
usage("missing overlay file(s)");
if (verbose) {
printf("input = %s\n", input_filename);
printf("output = %s\n", output_filename);
for (i = 0; i < argc; i++)
printf("overlay[%d] = %s\n", i, argv[i]);
}
if (do_fdtoverlay(input_filename, output_filename, argc, argv))
return 1;
return 0;
}
|
