usr.bin/dtc/dtc.cc

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2013 David Chisnall
   5  * All rights reserved.
   6  *
   7  * This software was developed by SRI International and the University of
   8  * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
   9  * ("CTSRD"), as part of the DARPA CRASH research programme.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD$
  33  */
  34
  35 #include <sys/resource.h>
  36 #include <fcntl.h>
  37 #include <libgen.h>
  38 #include <limits.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <time.h>
  42 #include <unistd.h>
  43
  44
  45 #include "fdt.hh"
  46 #include "checking.hh"
  47 #include "util.hh"
  48
  49 using namespace dtc;
  50 using std::string;
  51
  52 namespace {
  53
  54 /**
  55  * The current major version of the tool.
  56  */
  57 int version_major = 0;
  58 int version_major_compatible = 1;
  59 /**
  60  * The current minor version of the tool.
  61  */
  62 int version_minor = 5;
  63 int version_minor_compatible = 4;
  64 /**
  65  * The current patch level of the tool.
  66  */
  67 int version_patch = 0;
  68 int version_patch_compatible = 0;
  69
  70 void usage(const string &argv0)
  71 {
  72         fprintf(stderr, "Usage:\n"
  73                 "\t%s\t[-fhsv@] [-b boot_cpu_id] [-d dependency_file]"
  74                         "[-E [no-]checker_name]\n"
  75                 "\t\t[-H phandle_format] [-I input_format]"
  76                         "[-O output_format]\n"
  77                 "\t\t[-o output_file] [-R entries] [-S bytes] [-p bytes]"
  78                         "[-V blob_version]\n"
  79                 "\t\t-W [no-]checker_name] input_file\n", basename(argv0).c_str());
  80 }
  81
  82 /**
  83  * Prints the current version of this program..
  84  */
  85 void version(const char* progname)
  86 {
  87         fprintf(stdout, "Version: %s %d.%d.%d compatible with gpl dtc %d.%d.%d\n", progname,
  88                 version_major, version_minor, version_patch,
  89                 version_major_compatible, version_minor_compatible,
  90                 version_patch_compatible);
  91 }
  92
  93 } // Anonymous namespace
  94
  95 using fdt::device_tree;
  96
  97 int
  98 main(int argc, char **argv)
  99 {
 100         int ch;
 101         int outfile = fileno(stdout);
 102         const char *outfile_name = "-";
 103         const char *in_file = "-";
 104         FILE *depfile = 0;
 105         bool debug_mode = false;
 106         auto write_fn = &device_tree::write_binary;
 107         auto read_fn = &device_tree::parse_dts;
 108         uint32_t boot_cpu;
 109         bool boot_cpu_specified = false;
 110         bool keep_going = false;
 111         bool sort = false;
 112         clock_t c0 = clock();
 113         class device_tree tree;
 114         fdt::checking::check_manager checks;
 115         const char *options = "@hqI:O:o:V:d:R:S:p:b:fi:svH:W:E:DP:";
 116
 117         // Don't forget to update the man page if any more options are added.
 118         while ((ch = getopt(argc, argv, options)) != -1)
 119         {
 120                 switch (ch)
 121                 {
 122                 case 'h':
 123                         usage(argv[0]);
 124                         return EXIT_SUCCESS;
 125                 case 'v':
 126                         version(argv[0]);
 127                         return EXIT_SUCCESS;
 128                 case '@':
 129                         tree.write_symbols = true;
 130                         break;
 131                 case 'I':
 132                 {
 133                         string arg(optarg);
 134                         if (arg == "dtb")
 135                         {
 136                                 read_fn = &device_tree::parse_dtb;
 137                         }
 138                         else if (arg == "dts")
 139                         {
 140                                 read_fn = &device_tree::parse_dts;
 141                         }
 142                         else
 143                         {
 144                                 fprintf(stderr, "Unknown input format: %s\n", optarg);
 145                                 return EXIT_FAILURE;
 146                         }
 147                         break;
 148                 }
 149                 case 'O':
 150                 {
 151                         string arg(optarg);
 152                         if (arg == "dtb")
 153                         {
 154                                 write_fn = &device_tree::write_binary;
 155                         }
 156                         else if (arg == "asm")
 157                         {
 158                                 write_fn = &device_tree::write_asm;
 159                         }
 160                         else if (arg == "dts")
 161                         {
 162                                 write_fn = &device_tree::write_dts;
 163                         }
 164                         else
 165                         {
 166                                 fprintf(stderr, "Unknown output format: %s\n", optarg);
 167                                 return EXIT_FAILURE;
 168                         }
 169                         break;
 170                 }
 171                 case 'o':
 172                 {
 173                         outfile_name = optarg;
 174                         if (strcmp(outfile_name, "-") != 0)
 175                         {
 176                                 outfile = open(optarg, O_CREAT | O_TRUNC | O_WRONLY, 0666);
 177                                 if (outfile == -1)
 178                                 {
 179                                         perror("Unable to open output file");
 180                                         return EXIT_FAILURE;
 181                                 }
 182                         }
 183                         break;
 184                 }
 185                 case 'D':
 186                         debug_mode = true;
 187                         break;
 188                 case 'V':
 189                         if (string(optarg) != "17")
 190                         {
 191                                 fprintf(stderr, "Unknown output format version: %s\n", optarg);
 192                                 return EXIT_FAILURE;
 193                         }
 194                         break;
 195                 case 'd':
 196                 {
 197                         if (depfile != 0)
 198                         {
 199                                 fclose(depfile);
 200                         }
 201                         if (string(optarg) == "-")
 202                         {
 203                                 depfile = stdout;
 204                         }
 205                         else
 206                         {
 207                                 depfile = fdopen(open(optarg, O_CREAT | O_TRUNC | O_WRONLY, 0666), "w");
 208                                 if (depfile == 0)
 209                                 {
 210                                         perror("Unable to open dependency file");
 211                                         return EXIT_FAILURE;
 212                                 }
 213                         }
 214                         break;
 215                 }
 216                 case 'H':
 217                 {
 218                         string arg(optarg);
 219                         if (arg == "both")
 220                         {
 221                                 tree.set_phandle_format(device_tree::BOTH);
 222                         }
 223                         else if (arg == "epapr")
 224                         {
 225                                 tree.set_phandle_format(device_tree::EPAPR);
 226                         }
 227                         else if (arg == "linux")
 228                         {
 229                                 tree.set_phandle_format(device_tree::LINUX);
 230                         }
 231                         else
 232                         {
 233                                 fprintf(stderr, "Unknown phandle format: %s\n", optarg);
 234                                 return EXIT_FAILURE;
 235                         }
 236                         break;
 237                 }
 238                 case 'b':
 239                         // Don't bother to check if strtoll fails, just
 240                         // use the 0 it returns.
 241                         boot_cpu = (uint32_t)strtoll(optarg, 0, 10);
 242                         boot_cpu_specified = true;
 243                         break;
 244                 case 'f':
 245                         keep_going = true;
 246                         break;
 247                 case 'W':
 248                 case 'E':
 249                 {
 250                         string arg(optarg);
 251                         if ((arg.size() > 3) && (strncmp(optarg, "no-", 3) == 0))
 252                         {
 253                                 arg = string(optarg+3);
 254                                 if (!checks.disable_checker(arg))
 255                                 {
 256                                         fprintf(stderr, "Checker %s either does not exist or is already disabled\n", optarg+3);
 257                                 }
 258                                 break;
 259                         }
 260                         if (!checks.enable_checker(arg))
 261                         {
 262                                 fprintf(stderr, "Checker %s either does not exist or is already enabled\n", optarg);
 263                         }
 264                         break;
 265                 }
 266                 case 's':
 267                 {
 268                         sort = true;
 269                         break;
 270                 }
 271                 case 'i':
 272                 {
 273                         tree.add_include_path(optarg);
 274                         break;
 275                 }
 276                 // Should quiet warnings, but for now is silently ignored.
 277                 case 'q':
 278                         break;
 279                 case 'R':
 280                         tree.set_empty_reserve_map_entries(strtoll(optarg, 0, 10));
 281                         break;
 282                 case 'S':
 283                         tree.set_blob_minimum_size(strtoll(optarg, 0, 10));
 284                         break;
 285                 case 'p':
 286                         tree.set_blob_padding(strtoll(optarg, 0, 10));
 287                         break;
 288                 case 'P':
 289                         if (!tree.parse_define(optarg))
 290                         {
 291                                 fprintf(stderr, "Invalid predefine value %s\n",
 292                                         optarg);
 293                         }
 294                         break;
 295                 default:
 296                         fprintf(stderr, "Unknown option %c\n", ch);
 297                         return EXIT_FAILURE;
 298                 }
 299         }
 300         if (optind < argc)
 301         {
 302                 in_file = argv[optind];
 303         }
 304         if (depfile != 0)
 305         {
 306                 fputs(outfile_name, depfile);
 307                 fputs(": ", depfile);
 308                 fputs(in_file, depfile);
 309         }
 310         clock_t c1 = clock();
 311         (tree.*read_fn)(in_file, depfile);
 312         // Override the boot CPU found in the header, if we're loading from dtb
 313         if (boot_cpu_specified)
 314         {
 315                 tree.set_boot_cpu(boot_cpu);
 316         }
 317         if (sort)
 318         {
 319                 tree.sort();
 320         }
 321         if (depfile != 0)
 322         {
 323                 putc('\n', depfile);
 324                 fclose(depfile);
 325         }
 326         if (!(tree.is_valid() || keep_going))
 327         {
 328                 fprintf(stderr, "Failed to parse tree.\n");
 329                 return EXIT_FAILURE;
 330         }
 331         clock_t c2 = clock();
 332         if (!(checks.run_checks(&tree, true) || keep_going))
 333         {
 334                 return EXIT_FAILURE;
 335         }
 336         clock_t c3 = clock();
 337         (tree.*write_fn)(outfile);
 338         close(outfile);
 339         clock_t c4 = clock();
 340
 341         if (debug_mode)
 342         {
 343                 struct rusage r;
 344
 345                 getrusage(RUSAGE_SELF, &r);
 346                 fprintf(stderr, "Peak memory usage: %ld bytes\n", r.ru_maxrss);
 347                 fprintf(stderr, "Setup and option parsing took %f seconds\n",
 348                                 ((double)(c1-c0))/CLOCKS_PER_SEC);
 349                 fprintf(stderr, "Parsing took %f seconds\n",
 350                                 ((double)(c2-c1))/CLOCKS_PER_SEC);
 351                 fprintf(stderr, "Checking took %f seconds\n",
 352                                 ((double)(c3-c2))/CLOCKS_PER_SEC);
 353                 fprintf(stderr, "Generating output took %f seconds\n",
 354                                 ((double)(c4-c3))/CLOCKS_PER_SEC);
 355                 fprintf(stderr, "Total time: %f seconds\n",
 356                                 ((double)(c4-c0))/CLOCKS_PER_SEC);
 357                 // This is not needed, but keeps valgrind quiet.
 358                 fclose(stdin);
 359         }
 360         return EXIT_SUCCESS;
 361 }
 362