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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
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>
22#include <linux/kernel.h>
23
24#include "builtin.h"
25
26struct cmd_struct {
27 const char *name;
28 int (*fn)(int, const char **);
29 const char *help;
30};
31
32static const char objtool_usage_string[] =
33 "objtool COMMAND [ARGS]";
34
35static struct cmd_struct objtool_cmds[] = {
36 {"check", cmd_check, "Perform stack metadata validation on an object file" },
37 {"orc", cmd_orc, "Generate in-place ORC unwind tables for an object file" },
38};
39
40bool help;
41
42static 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
61 if (!help)
62 exit(129);
63 exit(0);
64}
65
66static 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);
79 cmd_usage();
80 }
81
82 (*argv)++;
83 (*argc)--;
84 }
85}
86
87static 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
106int 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}
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>
34
35#include "builtin.h"
36
37#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
38
39struct cmd_struct {
40 const char *name;
41 int (*fn)(int, const char **);
42 const char *help;
43};
44
45static const char objtool_usage_string[] =
46 "objtool [OPTIONS] COMMAND [ARGS]";
47
48static struct cmd_struct objtool_cmds[] = {
49 {"check", cmd_check, "Perform stack metadata validation on an object file" },
50};
51
52bool help;
53
54static void cmd_usage(void)
55{
56 unsigned int i, longest = 0;
57
58 printf("\n usage: %s\n\n", objtool_usage_string);
59
60 for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
61 if (longest < strlen(objtool_cmds[i].name))
62 longest = strlen(objtool_cmds[i].name);
63 }
64
65 puts(" Commands:");
66 for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
67 printf(" %-*s ", longest, objtool_cmds[i].name);
68 puts(objtool_cmds[i].help);
69 }
70
71 printf("\n");
72
73 exit(1);
74}
75
76static void handle_options(int *argc, const char ***argv)
77{
78 while (*argc > 0) {
79 const char *cmd = (*argv)[0];
80
81 if (cmd[0] != '-')
82 break;
83
84 if (!strcmp(cmd, "--help") || !strcmp(cmd, "-h")) {
85 help = true;
86 break;
87 } else {
88 fprintf(stderr, "Unknown option: %s\n", cmd);
89 fprintf(stderr, "\n Usage: %s\n",
90 objtool_usage_string);
91 exit(1);
92 }
93
94 (*argv)++;
95 (*argc)--;
96 }
97}
98
99static void handle_internal_command(int argc, const char **argv)
100{
101 const char *cmd = argv[0];
102 unsigned int i, ret;
103
104 for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
105 struct cmd_struct *p = objtool_cmds+i;
106
107 if (strcmp(p->name, cmd))
108 continue;
109
110 ret = p->fn(argc, argv);
111
112 exit(ret);
113 }
114
115 cmd_usage();
116}
117
118int main(int argc, const char **argv)
119{
120 static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED";
121
122 /* libsubcmd init */
123 exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED);
124 pager_init(UNUSED);
125
126 argv++;
127 argc--;
128 handle_options(&argc, &argv);
129
130 if (!argc || help)
131 cmd_usage();
132
133 handle_internal_command(argc, argv);
134
135 return 0;
136}