mirror of
https://github.com/torvalds/linux.git
synced 2024-11-23 20:51:44 +00:00
6a93bb7e4a
Print top-level objtool commands, along with the error on incorrect
command line usage. Objtool command line parser exit's with code 129,
for incorrect usage. Convert the cmd_usage() exit code also, to maintain
consistency across objtool.
After the patch:
$ ./objtool -j
Unknown option: -j
usage: objtool COMMAND [ARGS]
Commands:
check Perform stack metadata validation on an object file
orc Generate in-place ORC unwind tables for an object file
$ echo $?
129
Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1507992474-16142-1-git-send-email-kamalesh@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
135 lines
3.0 KiB
C
135 lines
3.0 KiB
C
/*
|
|
* Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/*
|
|
* objtool:
|
|
*
|
|
* The 'check' subcmd analyzes every .o file and ensures the validity of its
|
|
* stack trace metadata. It enforces a set of rules on asm code and C inline
|
|
* assembly code so that stack traces can be reliable.
|
|
*
|
|
* For more information, see tools/objtool/Documentation/stack-validation.txt.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <subcmd/exec-cmd.h>
|
|
#include <subcmd/pager.h>
|
|
#include <linux/kernel.h>
|
|
|
|
#include "builtin.h"
|
|
|
|
struct cmd_struct {
|
|
const char *name;
|
|
int (*fn)(int, const char **);
|
|
const char *help;
|
|
};
|
|
|
|
static const char objtool_usage_string[] =
|
|
"objtool COMMAND [ARGS]";
|
|
|
|
static struct cmd_struct objtool_cmds[] = {
|
|
{"check", cmd_check, "Perform stack metadata validation on an object file" },
|
|
{"orc", cmd_orc, "Generate in-place ORC unwind tables for an object file" },
|
|
};
|
|
|
|
bool help;
|
|
|
|
static void cmd_usage(void)
|
|
{
|
|
unsigned int i, longest = 0;
|
|
|
|
printf("\n usage: %s\n\n", objtool_usage_string);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
|
|
if (longest < strlen(objtool_cmds[i].name))
|
|
longest = strlen(objtool_cmds[i].name);
|
|
}
|
|
|
|
puts(" Commands:");
|
|
for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
|
|
printf(" %-*s ", longest, objtool_cmds[i].name);
|
|
puts(objtool_cmds[i].help);
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
exit(129);
|
|
}
|
|
|
|
static void handle_options(int *argc, const char ***argv)
|
|
{
|
|
while (*argc > 0) {
|
|
const char *cmd = (*argv)[0];
|
|
|
|
if (cmd[0] != '-')
|
|
break;
|
|
|
|
if (!strcmp(cmd, "--help") || !strcmp(cmd, "-h")) {
|
|
help = true;
|
|
break;
|
|
} else {
|
|
fprintf(stderr, "Unknown option: %s\n", cmd);
|
|
cmd_usage();
|
|
}
|
|
|
|
(*argv)++;
|
|
(*argc)--;
|
|
}
|
|
}
|
|
|
|
static void handle_internal_command(int argc, const char **argv)
|
|
{
|
|
const char *cmd = argv[0];
|
|
unsigned int i, ret;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
|
|
struct cmd_struct *p = objtool_cmds+i;
|
|
|
|
if (strcmp(p->name, cmd))
|
|
continue;
|
|
|
|
ret = p->fn(argc, argv);
|
|
|
|
exit(ret);
|
|
}
|
|
|
|
cmd_usage();
|
|
}
|
|
|
|
int main(int argc, const char **argv)
|
|
{
|
|
static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED";
|
|
|
|
/* libsubcmd init */
|
|
exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED);
|
|
pager_init(UNUSED);
|
|
|
|
argv++;
|
|
argc--;
|
|
handle_options(&argc, &argv);
|
|
|
|
if (!argc || help)
|
|
cmd_usage();
|
|
|
|
handle_internal_command(argc, argv);
|
|
|
|
return 0;
|
|
}
|