1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <time.h>
20
21 #include "ufdt_overlay.h"
22 #include "libufdt_sysdeps.h"
23
24 #include "util.h"
25
26
apply_ovleray_files(const char * out_filename,const char * base_filename,const char * overlay_filename)27 int apply_ovleray_files(const char *out_filename,
28 const char *base_filename,
29 const char *overlay_filename) {
30 int ret = 1;
31 char *base_buf = NULL;
32 char *overlay_buf = NULL;
33 struct fdt_header *new_blob = NULL;
34
35 size_t blob_len;
36 base_buf = load_file(base_filename, &blob_len);
37 if (!base_buf) {
38 fprintf(stderr, "Can not load base file: %s\n", base_filename);
39 goto end;
40 }
41
42 size_t overlay_len;
43 overlay_buf = load_file(overlay_filename, &overlay_len);
44 if (!overlay_buf) {
45 fprintf(stderr, "Can not load overlay file: %s\n", overlay_filename);
46 goto end;
47 }
48
49 struct fdt_header *blob = ufdt_install_blob(base_buf, blob_len);
50 if (!blob) {
51 fprintf(stderr, "ufdt_install_blob() returns null\n");
52 goto end;
53 }
54
55 clock_t start = clock();
56 new_blob = ufdt_apply_overlay(blob, blob_len, overlay_buf, overlay_len);
57 clock_t end = clock();
58
59 if (write_fdt_to_file(out_filename, new_blob) != 0) {
60 fprintf(stderr, "Write file error: %s\n", out_filename);
61 goto end;
62 }
63
64 // Outputs the used time.
65 double cpu_time_used = ((double)(end - start)) / CLOCKS_PER_SEC;
66 printf("ufdt_apply_overlay: took %.9f secs\n", cpu_time_used);
67 ret = 0;
68
69 end:
70 // Do not dto_free(blob) - it's the same as base_buf.
71
72 if (new_blob) dto_free(new_blob);
73 if (overlay_buf) dto_free(overlay_buf);
74 if (base_buf) dto_free(base_buf);
75
76 return ret;
77 }
78
main(int argc,char ** argv)79 int main(int argc, char **argv) {
80 if (argc < 4) {
81 fprintf(stderr, "Usage: %s <base_file> <overlay_file> <out_file>\n", argv[0]);
82 return 1;
83 }
84
85 const char *base_file = argv[1];
86 const char *overlay_file = argv[2];
87 const char *out_file = argv[3];
88 int ret = apply_ovleray_files(out_file, base_file, overlay_file);
89
90 return ret;
91 }
92