ufdt_verify_overlay_app.cpp revision 4c7735ac0173b71aceb489470fca15b56e64c4d4 
1/*
2 * Copyright (C) 2018 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 <fstream>
20
21#include "ufdt_test_overlay.h"
22
23extern "C" {
24
25#include "ufdt_overlay.h"
26#include "libufdt_sysdeps.h"
27
28}
29
30size_t read_file_to_buf(const char *filename, char** buf) {
31    size_t size = 0;
32    std::ifstream file(filename, std::ios::binary | std::ios::in);
33
34    if (!file) {
35        return size;
36    }
37
38    file.seekg(0, file.end);
39    size = file.tellg();
40    file.seekg(0, std::ios::beg);
41
42    *buf = new char[size];
43    file.read(*buf, size);
44    return size;
45}
46
47int verify_overlay_files(const char *final_filename,
48                         char** overlay_filenames, size_t overlay_count) {
49    char* final_buf = nullptr;
50    void** overlay_buf_array = new void*[overlay_count];
51    struct fdt_header *blob = nullptr;
52    int result = 1;
53    size_t final_size = 0, overlay_size = 0;
54
55    final_size = read_file_to_buf(final_filename, &final_buf);
56    if (final_size == 0) {
57        fprintf(stderr, "Cannot load final DTB: %s \n", final_filename);
58        goto end;
59    }
60
61    for (size_t i = 0; i < overlay_count; i++) {
62        overlay_size = read_file_to_buf(overlay_filenames[i],
63                                        reinterpret_cast<char**>(&overlay_buf_array[i]));
64        if (overlay_size == 0) {
65            fprintf(stderr, "Cannot load DTB Overlay: %s\n", overlay_filenames[i]);
66            goto end;
67        }
68    }
69
70    blob = ufdt_install_blob(final_buf, final_size);
71    if (!blob) {
72        fprintf(stderr, "ufdt_install_blob() returns null\n");
73        goto end;
74    }
75
76    result = ufdt_verify_dtbo(blob, final_size, overlay_buf_array, overlay_count);
77
78    if (result != 0) {
79        fprintf(stderr, "bad overlay error");
80    }
81
82end:
83    // Do not dto_free(blob) - it's the same as final_buf.
84    for (size_t i = 0; i < overlay_count; i++) {
85        if (overlay_buf_array[i]) dto_free(overlay_buf_array[i]);
86    }
87    delete[] overlay_buf_array;
88
89    if (final_buf) dto_free(final_buf);
90
91    return result;
92}
93
94int main(int argc, char **argv) {
95    if (argc < 3) {
96        fprintf(stderr, "Usage: %s <final_file> <overlay_file1> <overlay_file2> ..\n", argv[0]);
97        return 1;
98    }
99
100    const char *final_file = argv[1];
101    char** overlay_file_names = new char*[argc - 2];
102
103    for(int argv_idx = 2; argv_idx < argc; argv_idx++) {
104        overlay_file_names[argv_idx - 2] = argv[argv_idx];
105    }
106    int ret = verify_overlay_files(final_file, overlay_file_names, argc - 2);
107
108    return ret == 0 ? ret : 1;
109}
110