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// 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";
/* 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);
}
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