mirror of https://github.com/torvalds/linux.git
124 lines
2.4 KiB
C
124 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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#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 <unistd.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 <objtool/builtin.h>
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#include <objtool/objtool.h>
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#include <objtool/warn.h>
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bool debug;
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int indent;
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static struct objtool_file file;
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struct objtool_file *objtool_open_read(const char *filename)
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{
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if (file.elf) {
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ERROR("won't handle more than one file at a time");
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return NULL;
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}
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file.elf = elf_open_read(filename, O_RDWR);
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if (!file.elf)
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return NULL;
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hash_init(file.insn_hash);
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INIT_LIST_HEAD(&file.retpoline_call_list);
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INIT_LIST_HEAD(&file.return_thunk_list);
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INIT_LIST_HEAD(&file.static_call_list);
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INIT_LIST_HEAD(&file.mcount_loc_list);
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INIT_LIST_HEAD(&file.endbr_list);
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INIT_LIST_HEAD(&file.call_list);
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file.ignore_unreachables = opts.no_unreachable;
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file.hints = false;
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return &file;
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}
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int objtool_pv_add(struct objtool_file *f, int idx, struct symbol *func)
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{
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if (!opts.noinstr)
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return 0;
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if (!f->pv_ops) {
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ERROR("paravirt confusion");
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return -1;
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}
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/*
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* These functions will be patched into native code,
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* see paravirt_patch().
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*/
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if (!strcmp(func->name, "_paravirt_nop") ||
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!strcmp(func->name, "_paravirt_ident_64"))
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return 0;
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/* already added this function */
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if (!list_empty(&func->pv_target))
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return 0;
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list_add(&func->pv_target, &f->pv_ops[idx].targets);
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f->pv_ops[idx].clean = false;
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return 0;
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}
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char *top_level_dir(const char *file)
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{
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ssize_t len, self_len, file_len;
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char self[PATH_MAX], *str;
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int i;
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len = readlink("/proc/self/exe", self, sizeof(self) - 1);
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if (len <= 0)
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return NULL;
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self[len] = '\0';
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for (i = 0; i < 3; i++) {
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char *s = strrchr(self, '/');
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if (!s)
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return NULL;
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*s = '\0';
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}
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self_len = strlen(self);
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file_len = strlen(file);
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str = malloc(self_len + file_len + 2);
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if (!str)
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return NULL;
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memcpy(str, self, self_len);
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str[self_len] = '/';
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strcpy(str + self_len + 1, file);
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return str;
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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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if (argc > 1 && !strcmp(argv[1], "klp")) {
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argc--;
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argv++;
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return cmd_klp(argc, argv);
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}
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return objtool_run(argc, argv);
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}
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