mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 12:28:41 +08:00
f15c648f20
When the user requests help it's not an error so do not exit with a non-zero exit code. This is not especially useful for a user but any script that might wish to check that objtool --help is at least available can't rely on the exit code to crudely check that, for example, building an objtool executable succeeds. Signed-off-by: Matt Helsley <mhelsley@vmware.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
125 lines
2.4 KiB
C
125 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
|
|
*/
|
|
|
|
/*
|
|
* 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");
|
|
|
|
if (!help)
|
|
exit(129);
|
|
exit(0);
|
|
}
|
|
|
|
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;
|
|
}
|