tools/objtool/builtin-orc.c

   1 /*
   2  * Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 /*
  19  * objtool orc:
  20  *
  21  * This command analyzes a .o file and adds .orc_unwind and .orc_unwind_ip
  22  * sections to it, which is used by the in-kernel ORC unwinder.
  23  *
  24  * This command is a superset of "objtool check".
  25  */
  26
  27 #include <string.h>
  28 #include <subcmd/parse-options.h>
  29 #include "builtin.h"
  30 #include "check.h"
  31
  32
  33 static const char *orc_usage[] = {
  34         "objtool orc generate [<options>] file.o",
  35         "objtool orc dump file.o",
  36         NULL,
  37 };
  38
  39 extern const struct option check_options[];
  40 extern bool no_fp, no_unreachable;
  41
  42 int cmd_orc(int argc, const char **argv)
  43 {
  44         const char *objname;
  45
  46         argc--; argv++;
  47         if (argc <= 0)
  48                 usage_with_options(orc_usage, check_options);
  49
  50         if (!strncmp(argv[0], "gen", 3)) {
  51                 argc = parse_options(argc, argv, check_options, orc_usage, 0);
  52                 if (argc != 1)
  53                         usage_with_options(orc_usage, check_options);
  54
  55                 objname = argv[0];
  56
  57                 return check(objname, no_fp, no_unreachable, true);
  58         }
  59
  60         if (!strcmp(argv[0], "dump")) {
  61                 if (argc != 2)
  62                         usage_with_options(orc_usage, check_options);
  63
  64                 objname = argv[1];
  65
  66                 return orc_dump(objname);
  67         }
  68
  69         usage_with_options(orc_usage, check_options);
  70
  71         return 0;
  72 }