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2daf7faba7
Split the existing options into two groups: actions, which actually do something; and options, which modify the actions in some way. Also there's no need to have short flags for all the non-action options. Reserve short flags for the more important actions. While at it: - change a few of the short flags to be more intuitive - make option descriptions more consistently descriptive - sort options in the source like they are when printed - move options to a global struct Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Miroslav Benes <mbenes@suse.cz> Link: https://lkml.kernel.org/r/9dcaa752f83aca24b1b21f0b0eeb28a0c181c0b0.1650300597.git.jpoimboe@redhat.com
106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2015-2017 Josh Poimboeuf <jpoimboe@redhat.com>
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*/
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/*
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* objtool check:
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*
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* This command analyzes every .o file and ensures the validity of its stack
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* 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 <subcmd/parse-options.h>
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#include <string.h>
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#include <stdlib.h>
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#include <objtool/builtin.h>
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#include <objtool/objtool.h>
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struct opts opts;
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static const char * const check_usage[] = {
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"objtool check <actions> [<options>] file.o",
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NULL,
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};
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static const char * const env_usage[] = {
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"OBJTOOL_ARGS=\"<options>\"",
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NULL,
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};
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const struct option check_options[] = {
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OPT_GROUP("Actions:"),
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OPT_BOOLEAN('i', "ibt", &opts.ibt, "validate and annotate IBT"),
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OPT_BOOLEAN('m', "mcount", &opts.mcount, "annotate mcount/fentry calls for ftrace"),
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OPT_BOOLEAN('n', "noinstr", &opts.noinstr, "validate noinstr rules"),
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OPT_BOOLEAN('r', "retpoline", &opts.retpoline, "validate and annotate retpoline usage"),
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OPT_BOOLEAN('l', "sls", &opts.sls, "validate straight-line-speculation mitigations"),
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OPT_BOOLEAN('u', "uaccess", &opts.uaccess, "validate uaccess rules for SMAP"),
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OPT_GROUP("Options:"),
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OPT_BOOLEAN(0, "backtrace", &opts.backtrace, "unwind on error"),
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OPT_BOOLEAN(0, "backup", &opts.backup, "create .orig files before modification"),
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OPT_BOOLEAN(0, "dry-run", &opts.dryrun, "don't write modifications"),
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OPT_BOOLEAN(0, "lto", &opts.lto, "whole-archive like runs"),
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OPT_BOOLEAN(0, "module", &opts.module, "object is part of a kernel module"),
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OPT_BOOLEAN(0, "no-fp", &opts.no_fp, "skip frame pointer validation"),
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OPT_BOOLEAN(0, "no-unreachable", &opts.no_unreachable, "skip 'unreachable instruction' warnings"),
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OPT_BOOLEAN(0, "stats", &opts.stats, "print statistics"),
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OPT_BOOLEAN(0, "vmlinux", &opts.vmlinux, "vmlinux.o validation"),
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OPT_END(),
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};
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int cmd_parse_options(int argc, const char **argv, const char * const usage[])
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{
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const char *envv[16] = { };
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char *env;
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int envc;
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env = getenv("OBJTOOL_ARGS");
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if (env) {
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envv[0] = "OBJTOOL_ARGS";
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for (envc = 1; envc < ARRAY_SIZE(envv); ) {
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envv[envc++] = env;
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env = strchr(env, ' ');
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if (!env)
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break;
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*env = '\0';
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env++;
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}
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parse_options(envc, envv, check_options, env_usage, 0);
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}
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argc = parse_options(argc, argv, check_options, usage, 0);
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if (argc != 1)
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usage_with_options(usage, check_options);
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return argc;
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}
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int cmd_check(int argc, const char **argv)
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{
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const char *objname;
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struct objtool_file *file;
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int ret;
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argc = cmd_parse_options(argc, argv, check_usage);
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objname = argv[0];
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file = objtool_open_read(objname);
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if (!file)
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return 1;
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ret = check(file);
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if (ret)
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return ret;
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if (file->elf->changed)
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return elf_write(file->elf);
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return 0;
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}
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