125 lines
2.4 KiB
C
125 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
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*/
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/*
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* objtool:
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*
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* The 'check' subcmd analyzes every .o file and ensures the validity of its
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* stack trace metadata. It enforces a set of rules on asm code and C inline
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* assembly code so that stack traces can be reliable.
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*
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* For more information, see tools/objtool/Documentation/stack-validation.txt.
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#include <stdlib.h>
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#include <subcmd/exec-cmd.h>
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#include <subcmd/pager.h>
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#include <linux/kernel.h>
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#include "builtin.h"
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struct cmd_struct {
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const char *name;
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int (*fn)(int, const char **);
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const char *help;
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};
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static const char objtool_usage_string[] =
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"objtool COMMAND [ARGS]";
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static struct cmd_struct objtool_cmds[] = {
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{"check", cmd_check, "Perform stack metadata validation on an object file" },
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{"orc", cmd_orc, "Generate in-place ORC unwind tables for an object file" },
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};
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bool help;
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static void cmd_usage(void)
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{
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unsigned int i, longest = 0;
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printf("\n usage: %s\n\n", objtool_usage_string);
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for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
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if (longest < strlen(objtool_cmds[i].name))
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longest = strlen(objtool_cmds[i].name);
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}
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puts(" Commands:");
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for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
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printf(" %-*s ", longest, objtool_cmds[i].name);
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puts(objtool_cmds[i].help);
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}
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printf("\n");
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if (!help)
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exit(129);
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exit(0);
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}
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static void handle_options(int *argc, const char ***argv)
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{
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while (*argc > 0) {
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const char *cmd = (*argv)[0];
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if (cmd[0] != '-')
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break;
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if (!strcmp(cmd, "--help") || !strcmp(cmd, "-h")) {
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help = true;
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break;
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} else {
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fprintf(stderr, "Unknown option: %s\n", cmd);
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cmd_usage();
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}
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(*argv)++;
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(*argc)--;
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}
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}
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static void handle_internal_command(int argc, const char **argv)
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{
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const char *cmd = argv[0];
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unsigned int i, ret;
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for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
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struct cmd_struct *p = objtool_cmds+i;
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if (strcmp(p->name, cmd))
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continue;
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ret = p->fn(argc, argv);
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exit(ret);
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}
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cmd_usage();
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}
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int main(int argc, const char **argv)
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{
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static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED";
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/* libsubcmd init */
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exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED);
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pager_init(UNUSED);
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argv++;
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argc--;
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handle_options(&argc, &argv);
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if (!argc || help)
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cmd_usage();
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handle_internal_command(argc, argv);
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return 0;
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}
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