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
26int apply_overlay_files(const char *out_filename, const char *base_filename,
27                        const char *overlay_filename) {
28  int ret = 1;
29  char *base_buf = NULL;
30  char *overlay_buf = NULL;
31  struct fdt_header *new_blob = NULL;
32
33  size_t blob_len;
34  base_buf = load_file(base_filename, &blob_len);
35  if (!base_buf) {
36    fprintf(stderr, "Can not load base file: %s\n", base_filename);
37    goto end;
38  }
39
40  size_t overlay_len;
41  overlay_buf = load_file(overlay_filename, &overlay_len);
42  if (!overlay_buf) {
43    fprintf(stderr, "Can not load overlay file: %s\n", overlay_filename);
44    goto end;
45  }
46
47  struct fdt_header *blob = ufdt_install_blob(base_buf, blob_len);
48  if (!blob) {
49    fprintf(stderr, "ufdt_install_blob() returns null\n");
50    goto end;
51  }
52
53  clock_t start = clock();
54  new_blob = ufdt_apply_overlay(blob, blob_len, overlay_buf, overlay_len);
55  clock_t end = clock();
56
57  if (write_fdt_to_file(out_filename, new_blob) != 0) {
58    fprintf(stderr, "Write file error: %s\n", out_filename);
59    goto end;
60  }
61
62  // Outputs the used time.
63  double cpu_time_used = ((double)(end - start)) / CLOCKS_PER_SEC;
64  printf("ufdt_apply_overlay: took %.9f secs\n", cpu_time_used);
65  ret = 0;
66
67end:
68  // Do not dto_free(blob) - it's the same as base_buf.
69
70  if (new_blob) dto_free(new_blob);
71  if (overlay_buf) dto_free(overlay_buf);
72  if (base_buf) dto_free(base_buf);
73
74  return ret;
75}
76
77int main(int argc, char **argv) {
78  if (argc < 4) {
79    fprintf(stderr, "Usage: %s <base_file> <overlay_file> <out_file>\n", argv[0]);
80    return 1;
81  }
82
83  const char *base_file = argv[1];
84  const char *overlay_file = argv[2];
85  const char *out_file = argv[3];
86  int ret = apply_overlay_files(out_file, base_file, overlay_file);
87
88  return ret;
89}
90