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1 | /* |
2 | * Copyright (C) 2015 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: | |
20 | * | |
21 | * The 'check' subcmd analyzes every .o file and ensures the validity of its | |
22 | * stack trace metadata. It enforces a set of rules on asm code and C inline | |
23 | * assembly code so that stack traces can be reliable. | |
24 | * | |
25 | * For more information, see tools/objtool/Documentation/stack-validation.txt. | |
26 | */ | |
27 | ||
28 | #include <stdio.h> | |
29 | #include <stdbool.h> | |
30 | #include <string.h> | |
31 | #include <stdlib.h> | |
32 | #include <subcmd/exec-cmd.h> | |
33 | #include <subcmd/pager.h> | |
00614597 | 34 | #include <linux/kernel.h> |
442f04c3 JP |
35 | |
36 | #include "builtin.h" | |
37 | ||
442f04c3 JP |
38 | struct cmd_struct { |
39 | const char *name; | |
40 | int (*fn)(int, const char **); | |
41 | const char *help; | |
42 | }; | |
43 | ||
44 | static const char objtool_usage_string[] = | |
45 | "objtool [OPTIONS] COMMAND [ARGS]"; | |
46 | ||
47 | static struct cmd_struct objtool_cmds[] = { | |
48 | {"check", cmd_check, "Perform stack metadata validation on an object file" }, | |
49 | }; | |
50 | ||
51 | bool help; | |
52 | ||
53 | static void cmd_usage(void) | |
54 | { | |
55 | unsigned int i, longest = 0; | |
56 | ||
57 | printf("\n usage: %s\n\n", objtool_usage_string); | |
58 | ||
59 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) { | |
60 | if (longest < strlen(objtool_cmds[i].name)) | |
61 | longest = strlen(objtool_cmds[i].name); | |
62 | } | |
63 | ||
64 | puts(" Commands:"); | |
65 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) { | |
66 | printf(" %-*s ", longest, objtool_cmds[i].name); | |
67 | puts(objtool_cmds[i].help); | |
68 | } | |
69 | ||
70 | printf("\n"); | |
71 | ||
72 | exit(1); | |
73 | } | |
74 | ||
75 | static void handle_options(int *argc, const char ***argv) | |
76 | { | |
77 | while (*argc > 0) { | |
78 | const char *cmd = (*argv)[0]; | |
79 | ||
80 | if (cmd[0] != '-') | |
81 | break; | |
82 | ||
83 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "-h")) { | |
84 | help = true; | |
85 | break; | |
86 | } else { | |
87 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
88 | fprintf(stderr, "\n Usage: %s\n", | |
89 | objtool_usage_string); | |
90 | exit(1); | |
91 | } | |
92 | ||
93 | (*argv)++; | |
94 | (*argc)--; | |
95 | } | |
96 | } | |
97 | ||
98 | static void handle_internal_command(int argc, const char **argv) | |
99 | { | |
100 | const char *cmd = argv[0]; | |
101 | unsigned int i, ret; | |
102 | ||
103 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) { | |
104 | struct cmd_struct *p = objtool_cmds+i; | |
105 | ||
106 | if (strcmp(p->name, cmd)) | |
107 | continue; | |
108 | ||
109 | ret = p->fn(argc, argv); | |
110 | ||
111 | exit(ret); | |
112 | } | |
113 | ||
114 | cmd_usage(); | |
115 | } | |
116 | ||
117 | int main(int argc, const char **argv) | |
118 | { | |
119 | static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED"; | |
120 | ||
121 | /* libsubcmd init */ | |
122 | exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED); | |
123 | pager_init(UNUSED); | |
124 | ||
125 | argv++; | |
126 | argc--; | |
127 | handle_options(&argc, &argv); | |
128 | ||
129 | if (!argc || help) | |
130 | cmd_usage(); | |
131 | ||
132 | handle_internal_command(argc, argv); | |
133 | ||
134 | return 0; | |
135 | } |