1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
 4 */
 5
 6#ifndef _WARN_H
 7#define _WARN_H
 8
 9#include <stdlib.h>
10#include <string.h>
11#include <sys/types.h>
12#include <sys/stat.h>
13#include <fcntl.h>
14#include "elf.h"
15
16extern const char *objname;
17
18static inline char *offstr(struct section *sec, unsigned long offset)
19{
20	struct symbol *func;
21	char *name, *str;
22	unsigned long name_off;
23
24	func = find_containing_func(sec, offset);
25	if (func) {
26		name = func->name;
27		name_off = offset - func->offset;
28	} else {
29		name = sec->name;
30		name_off = offset;
31	}
32
33	str = malloc(strlen(name) + 20);
34
35	if (func)
36		sprintf(str, "%s()+0x%lx", name, name_off);
37	else
38		sprintf(str, "%s+0x%lx", name, name_off);
39
40	return str;
41}
42
43#define WARN(format, ...)				\
44	fprintf(stderr,					\
45		"%s: warning: objtool: " format "\n",	\
46		objname, ##__VA_ARGS__)
47
48#define WARN_FUNC(format, sec, offset, ...)		\
49({							\
50	char *_str = offstr(sec, offset);		\
51	WARN("%s: " format, _str, ##__VA_ARGS__);	\
52	free(_str);					\
53})
54
55#define BT_FUNC(format, insn, ...)			\
56({							\
57	struct instruction *_insn = (insn);		\
58	char *_str = offstr(_insn->sec, _insn->offset); \
59	WARN("  %s: " format, _str, ##__VA_ARGS__);	\
60	free(_str);					\
61})
62
63#define WARN_ELF(format, ...)				\
64	WARN(format ": %s", ##__VA_ARGS__, elf_errmsg(-1))
65
66#endif /* _WARN_H */