Pantelis Antoniou | 4240914 | 2017-06-14 17:51:11 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017 Konsulko Group Inc. All rights reserved. |
| 3 | * |
| 4 | * Author: |
| 5 | * Pantelis Antoniou <pantelis.antoniou@konsulko.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License as |
| 9 | * published by the Free Software Foundation; either version 2 of |
| 10 | * the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 20 | * MA 02111-1307 USA |
| 21 | */ |
| 22 | |
| 23 | #include <assert.h> |
| 24 | #include <ctype.h> |
| 25 | #include <getopt.h> |
| 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <string.h> |
| 29 | #include <alloca.h> |
| 30 | |
| 31 | #include <libfdt.h> |
| 32 | |
| 33 | #include "util.h" |
| 34 | |
| 35 | /* Usage related data. */ |
| 36 | static const char usage_synopsis[] = |
| 37 | "apply a number of overlays to a base blob\n" |
| 38 | " fdtoverlay <options> [<overlay.dtbo> [<overlay.dtbo>]]\n" |
| 39 | "\n" |
| 40 | USAGE_TYPE_MSG; |
| 41 | static const char usage_short_opts[] = "i:o:v" USAGE_COMMON_SHORT_OPTS; |
| 42 | static struct option const usage_long_opts[] = { |
| 43 | {"input", required_argument, NULL, 'i'}, |
| 44 | {"output", required_argument, NULL, 'o'}, |
| 45 | {"verbose", no_argument, NULL, 'v'}, |
| 46 | USAGE_COMMON_LONG_OPTS, |
| 47 | }; |
| 48 | static const char * const usage_opts_help[] = { |
| 49 | "Input base DT blob", |
| 50 | "Output DT blob", |
| 51 | "Verbose messages", |
| 52 | USAGE_COMMON_OPTS_HELP |
| 53 | }; |
| 54 | |
| 55 | int verbose = 0; |
| 56 | |
| 57 | static int do_fdtoverlay(const char *input_filename, |
| 58 | const char *output_filename, |
| 59 | int argc, char *argv[]) |
| 60 | { |
| 61 | char *blob = NULL; |
| 62 | char **ovblob = NULL; |
| 63 | off_t blob_len, ov_len, total_len; |
| 64 | int i, ret = -1; |
| 65 | |
| 66 | blob = utilfdt_read_len(input_filename, &blob_len); |
| 67 | if (!blob) { |
| 68 | fprintf(stderr, "\nFailed to read base blob %s\n", |
| 69 | input_filename); |
| 70 | goto out_err; |
| 71 | } |
| 72 | ret = 0; |
| 73 | |
| 74 | /* allocate blob pointer array */ |
| 75 | ovblob = alloca(sizeof(*ovblob) * argc); |
| 76 | memset(ovblob, 0, sizeof(*ovblob) * argc); |
| 77 | |
| 78 | /* read and keep track of the overlay blobs */ |
| 79 | total_len = 0; |
| 80 | for (i = 0; i < argc; i++) { |
| 81 | ovblob[i] = utilfdt_read_len(argv[i], &ov_len); |
| 82 | if (!ovblob[i]) { |
| 83 | fprintf(stderr, "\nFailed to read overlay %s\n", |
| 84 | argv[i]); |
| 85 | goto out_err; |
| 86 | } |
| 87 | total_len += ov_len; |
| 88 | } |
| 89 | |
| 90 | /* grow the blob to worst case */ |
| 91 | blob_len = fdt_totalsize(blob) + total_len; |
| 92 | blob = xrealloc(blob, blob_len); |
| 93 | fdt_open_into(blob, blob, blob_len); |
| 94 | |
| 95 | /* apply the overlays in sequence */ |
| 96 | for (i = 0; i < argc; i++) { |
| 97 | ret = fdt_overlay_apply(blob, ovblob[i]); |
| 98 | if (ret) { |
| 99 | fprintf(stderr, "\nFailed to apply %s (%d)\n", |
| 100 | argv[i], ret); |
| 101 | goto out_err; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | fdt_pack(blob); |
| 106 | ret = utilfdt_write(output_filename, blob); |
| 107 | if (ret) |
| 108 | fprintf(stderr, "\nFailed to write output blob %s\n", |
| 109 | output_filename); |
| 110 | |
| 111 | out_err: |
| 112 | if (ovblob) { |
| 113 | for (i = 0; i < argc; i++) { |
| 114 | if (ovblob[i]) |
| 115 | free(ovblob[i]); |
| 116 | } |
| 117 | } |
| 118 | free(blob); |
| 119 | |
| 120 | return ret; |
| 121 | } |
| 122 | |
| 123 | int main(int argc, char *argv[]) |
| 124 | { |
| 125 | int opt, i; |
| 126 | char *input_filename = NULL; |
| 127 | char *output_filename = NULL; |
| 128 | |
| 129 | while ((opt = util_getopt_long()) != EOF) { |
| 130 | switch (opt) { |
| 131 | case_USAGE_COMMON_FLAGS |
| 132 | |
| 133 | case 'i': |
| 134 | input_filename = optarg; |
| 135 | break; |
| 136 | case 'o': |
| 137 | output_filename = optarg; |
| 138 | break; |
| 139 | case 'v': |
| 140 | verbose = 1; |
| 141 | break; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | if (!input_filename) |
| 146 | usage("missing input file"); |
| 147 | |
| 148 | if (!output_filename) |
| 149 | usage("missing output file"); |
| 150 | |
| 151 | argv += optind; |
| 152 | argc -= optind; |
| 153 | |
| 154 | if (argc <= 0) |
| 155 | usage("missing overlay file(s)"); |
| 156 | |
| 157 | if (verbose) { |
| 158 | printf("input = %s\n", input_filename); |
| 159 | printf("output = %s\n", output_filename); |
| 160 | for (i = 0; i < argc; i++) |
| 161 | printf("overlay[%d] = %s\n", i, argv[i]); |
| 162 | } |
| 163 | |
| 164 | if (do_fdtoverlay(input_filename, output_filename, argc, argv)) |
| 165 | return 1; |
| 166 | |
| 167 | return 0; |
| 168 | } |