| 1 | |
| 2 | * Copyright (C) 2015 Josh Poimboeuf <[email protected]>
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| 3 | *
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| 4 | * This program is free software; you can redistribute it and/or
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| 5 | * modify it under the terms of the GNU General Public License
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| 6 | * as published by the Free Software Foundation; either version 2
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| 7 | * of the License, or (at your option) any later version.
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| 8 | *
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| 9 | * This program is distributed in the hope that it will be useful,
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | * GNU General Public License for more details.
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| 13 | *
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| 14 | * You should have received a copy of the GNU General Public License
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| 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>.
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| 16 |
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| 17 |
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| 18 | |
| 19 | * objtool:
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| 20 | *
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| 21 | * The 'check' subcmd analyzes every .o file and ensures the validity of its
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| 22 | * stack trace metadata. It enforces a set of rules on asm code and C inline
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| 23 | * assembly code so that stack traces can be reliable.
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| 24 | *
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| 25 | * For more information, see tools/objtool/Documentation/stack-validation.txt.
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| 26 |
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| 27 |
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| 28 | #include <stdio.h>
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| 29 | #include <stdbool.h>
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| 30 | #include <string.h>
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| 31 | #include <stdlib.h>
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| 32 | #include <subcmd/exec-cmd.h>
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| 33 | #include <subcmd/pager.h>
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| 34 | #include <linux/kernel.h>
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| 35 |
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| 36 | #include "builtin.h"
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| 37 |
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| 38 | struct cmd_struct {
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| 39 | const char *name;
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| 40 | int (*fn)(int, const char **);
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| 41 | const char *help;
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| 42 | };
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| 43 |
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| 44 | static const char objtool_usage_string[] =
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| 45 | "objtool [OPTIONS] COMMAND [ARGS]";
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| 46 |
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| 47 | static struct cmd_struct objtool_cmds[] = {
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| 48 | {"check", cmd_check, "Perform stack metadata validation on an object file" },
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| 49 | };
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| 50 |
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| 51 | bool help;
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| 52 |
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| 53 | static void cmd_usage(void)
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| 54 | {
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| 55 | unsigned int i, longest = 0;
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| 56 |
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| 57 | printf("\n usage: %s\n\n", objtool_usage_string);
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| 58 |
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| 59 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
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| 60 | if (longest < strlen(objtool_cmds[i].name))
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| 61 | longest = strlen(objtool_cmds[i].name);
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| 62 | }
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| 63 |
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| 64 | puts(" Commands:");
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| 65 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
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| 66 | printf(" %-*s ", longest, objtool_cmds[i].name);
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| 67 | puts(objtool_cmds[i].help);
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| 68 | }
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| 69 |
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| 70 | printf("\n");
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| 71 |
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| 72 | exit(1);
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| 73 | }
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| 74 |
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| 75 | static void handle_options(int *argc, const char ***argv)
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| 76 | {
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| 77 | while (*argc > 0) {
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| 78 | const char *cmd = (*argv)[0];
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| 79 |
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| 80 | if (cmd[0] != '-')
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| 81 | break;
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| 82 |
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| 83 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "-h")) {
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| 84 | help = true;
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| 85 | break;
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| 86 | } else {
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| 87 | fprintf(stderr, "Unknown option: %s\n", cmd);
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| 88 | fprintf(stderr, "\n Usage: %s\n",
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| 89 | objtool_usage_string);
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| 90 | exit(1);
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| 91 | }
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| 92 |
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| 93 | (*argv)++;
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| 94 | (*argc)--;
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| 95 | }
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| 96 | }
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| 97 |
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| 98 | static void handle_internal_command(int argc, const char **argv)
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| 99 | {
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| 100 | const char *cmd = argv[0];
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| 101 | unsigned int i, ret;
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| 102 |
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| 103 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
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| 104 | struct cmd_struct *p = objtool_cmds+i;
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| 105 |
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| 106 | if (strcmp(p->name, cmd))
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| 107 | continue;
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| 108 |
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| 109 | ret = p->fn(argc, argv);
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| 110 |
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| 111 | exit(ret);
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| 112 | }
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| 113 |
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| 114 | cmd_usage();
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| 115 | }
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| 116 |
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| 117 | int main(int argc, const char **argv)
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| 118 | {
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| 119 | static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED";
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| 120 |
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| 121 |
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| 122 | exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED);
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| 123 | pager_init(UNUSED);
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| 124 |
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| 125 | argv++;
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| 126 | argc--;
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| 127 | handle_options(&argc, &argv);
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| 128 |
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| 129 | if (!argc || help)
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| 130 | cmd_usage();
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| 131 |
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| 132 | handle_internal_command(argc, argv);
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| 133 |
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| 134 | return 0;
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| 135 | }
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