// SPDX-License-Identifier: GPL-2.0-or-later/* * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com> */ #include <stdio.h>#include <stdbool.h>#include <string.h>#include <stdlib.h>#include <unistd.h>#include <subcmd/exec-cmd.h>#include <subcmd/pager.h>#include <linux/kernel.h> #include <objtool/builtin.h>#include <objtool/objtool.h>#include <objtool/warn.h> bool debug;int indent; static struct objtool_file file; struct objtool_file *objtool_open_read(const char *filename){	if (file.elf) {		ERROR("won't handle more than one file at a time");		return NULL;	} 	file.elf = elf_open_read(filename, O_RDWR);	if (!file.elf)		return NULL; 	hash_init(file.insn_hash);	INIT_LIST_HEAD(&file.retpoline_call_list);	INIT_LIST_HEAD(&file.return_thunk_list);	INIT_LIST_HEAD(&file.static_call_list);	INIT_LIST_HEAD(&file.mcount_loc_list);	INIT_LIST_HEAD(&file.endbr_list);	INIT_LIST_HEAD(&file.call_list);	file.ignore_unreachables = opts.no_unreachable;	file.hints = false; 	return &file;} int objtool_pv_add(struct objtool_file *f, int idx, struct symbol *func){	if (!opts.noinstr)		return 0; 	if (!f->pv_ops) {		ERROR("paravirt confusion");		return -1;	} 	/*	 * These functions will be patched into native code,	 * see paravirt_patch().	 */	if (!strcmp(func->name, "_paravirt_nop") ||	    !strcmp(func->name, "_paravirt_ident_64"))		return 0; 	/* already added this function */	if (!list_empty(&func->pv_target))		return 0; 	list_add(&func->pv_target, &f->pv_ops[idx].targets);	f->pv_ops[idx].clean = false;	return 0;} char *top_level_dir(const char *file){	ssize_t len, self_len, file_len;	char self[PATH_MAX], *str;	int i; 	len = readlink("/proc/self/exe", self, sizeof(self) - 1);	if (len <= 0)		return NULL;	self[len] = '\0'; 	for (i = 0; i < 3; i++) {		char *s = strrchr(self, '/');		if (!s)			return NULL;		*s = '\0';	} 	self_len = strlen(self);	file_len = strlen(file); 	str = malloc(self_len + file_len + 2);	if (!str)		return NULL; 	memcpy(str, self, self_len);	str[self_len] = '/';	strcpy(str + self_len + 1, file); 	return str;} int main(int argc, const char **argv){	static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED"; 	if (init_signal_handler())		return -1; 	/* libsubcmd init */	exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED);	pager_init(UNUSED); 	if (argc > 1 && !strcmp(argv[1], "klp")) {		argc--;		argv++;		return cmd_klp(argc, argv);	} 	return objtool_run(argc, argv);}