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1ccea77e | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
442f04c3 JP |
2 | /* |
3 | * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com> | |
442f04c3 JP |
4 | */ |
5 | ||
6 | /* | |
7 | * objtool: | |
8 | * | |
9 | * The 'check' subcmd analyzes every .o file and ensures the validity of its | |
10 | * stack trace metadata. It enforces a set of rules on asm code and C inline | |
11 | * assembly code so that stack traces can be reliable. | |
12 | * | |
13 | * For more information, see tools/objtool/Documentation/stack-validation.txt. | |
14 | */ | |
15 | ||
16 | #include <stdio.h> | |
17 | #include <stdbool.h> | |
18 | #include <string.h> | |
19 | #include <stdlib.h> | |
20 | #include <subcmd/exec-cmd.h> | |
21 | #include <subcmd/pager.h> | |
00614597 | 22 | #include <linux/kernel.h> |
442f04c3 JP |
23 | |
24 | #include "builtin.h" | |
25 | ||
442f04c3 JP |
26 | struct cmd_struct { |
27 | const char *name; | |
28 | int (*fn)(int, const char **); | |
29 | const char *help; | |
30 | }; | |
31 | ||
32 | static const char objtool_usage_string[] = | |
627fce14 | 33 | "objtool COMMAND [ARGS]"; |
442f04c3 JP |
34 | |
35 | static struct cmd_struct objtool_cmds[] = { | |
36 | {"check", cmd_check, "Perform stack metadata validation on an object file" }, | |
627fce14 | 37 | {"orc", cmd_orc, "Generate in-place ORC unwind tables for an object file" }, |
442f04c3 JP |
38 | }; |
39 | ||
40 | bool help; | |
41 | ||
42 | static void cmd_usage(void) | |
43 | { | |
44 | unsigned int i, longest = 0; | |
45 | ||
46 | printf("\n usage: %s\n\n", objtool_usage_string); | |
47 | ||
48 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) { | |
49 | if (longest < strlen(objtool_cmds[i].name)) | |
50 | longest = strlen(objtool_cmds[i].name); | |
51 | } | |
52 | ||
53 | puts(" Commands:"); | |
54 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) { | |
55 | printf(" %-*s ", longest, objtool_cmds[i].name); | |
56 | puts(objtool_cmds[i].help); | |
57 | } | |
58 | ||
59 | printf("\n"); | |
60 | ||
f15c648f MH |
61 | if (!help) |
62 | exit(129); | |
63 | exit(0); | |
442f04c3 JP |
64 | } |
65 | ||
66 | static void handle_options(int *argc, const char ***argv) | |
67 | { | |
68 | while (*argc > 0) { | |
69 | const char *cmd = (*argv)[0]; | |
70 | ||
71 | if (cmd[0] != '-') | |
72 | break; | |
73 | ||
74 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "-h")) { | |
75 | help = true; | |
76 | break; | |
77 | } else { | |
78 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
6a93bb7e | 79 | cmd_usage(); |
442f04c3 JP |
80 | } |
81 | ||
82 | (*argv)++; | |
83 | (*argc)--; | |
84 | } | |
85 | } | |
86 | ||
87 | static void handle_internal_command(int argc, const char **argv) | |
88 | { | |
89 | const char *cmd = argv[0]; | |
90 | unsigned int i, ret; | |
91 | ||
92 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) { | |
93 | struct cmd_struct *p = objtool_cmds+i; | |
94 | ||
95 | if (strcmp(p->name, cmd)) | |
96 | continue; | |
97 | ||
98 | ret = p->fn(argc, argv); | |
99 | ||
100 | exit(ret); | |
101 | } | |
102 | ||
103 | cmd_usage(); | |
104 | } | |
105 | ||
106 | int main(int argc, const char **argv) | |
107 | { | |
108 | static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED"; | |
109 | ||
110 | /* libsubcmd init */ | |
111 | exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED); | |
112 | pager_init(UNUSED); | |
113 | ||
114 | argv++; | |
115 | argc--; | |
116 | handle_options(&argc, &argv); | |
117 | ||
118 | if (!argc || help) | |
119 | cmd_usage(); | |
120 | ||
121 | handle_internal_command(argc, argv); | |
122 | ||
123 | return 0; | |
124 | } |