Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/* Rewritten and vastly simplified by Rusty Russell for in-kernel
2 * module loader:
3 * Copyright 2002 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation
4 */
5#ifndef _LINUX_KALLSYMS_H
6#define _LINUX_KALLSYMS_H
7
8#include <linux/errno.h>
9#include <linux/kernel.h>
10#include <linux/stddef.h>
11
12#define KSYM_NAME_LEN 128
13#define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + (KSYM_NAME_LEN - 1) + \
14 2*(BITS_PER_LONG*3/10) + (MODULE_NAME_LEN - 1) + 1)
15
16struct module;
17
18#ifdef CONFIG_KALLSYMS
19/* Lookup the address for a symbol. Returns 0 if not found. */
20unsigned long kallsyms_lookup_name(const char *name);
21
22/* Call a function on each kallsyms symbol in the core kernel */
23int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
24 unsigned long),
25 void *data);
26
27extern int kallsyms_lookup_size_offset(unsigned long addr,
28 unsigned long *symbolsize,
29 unsigned long *offset);
30
31/* Lookup an address. modname is set to NULL if it's in the kernel. */
32const char *kallsyms_lookup(unsigned long addr,
33 unsigned long *symbolsize,
34 unsigned long *offset,
35 char **modname, char *namebuf);
36
37/* Look up a kernel symbol and return it in a text buffer. */
38extern int sprint_symbol(char *buffer, unsigned long address);
39extern int sprint_backtrace(char *buffer, unsigned long address);
40
41/* Look up a kernel symbol and print it to the kernel messages. */
42extern void __print_symbol(const char *fmt, unsigned long address);
43
44int lookup_symbol_name(unsigned long addr, char *symname);
45int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
46
47#else /* !CONFIG_KALLSYMS */
48
49static inline unsigned long kallsyms_lookup_name(const char *name)
50{
51 return 0;
52}
53
54static inline int kallsyms_on_each_symbol(int (*fn)(void *, const char *,
55 struct module *,
56 unsigned long),
57 void *data)
58{
59 return 0;
60}
61
62static inline int kallsyms_lookup_size_offset(unsigned long addr,
63 unsigned long *symbolsize,
64 unsigned long *offset)
65{
66 return 0;
67}
68
69static inline const char *kallsyms_lookup(unsigned long addr,
70 unsigned long *symbolsize,
71 unsigned long *offset,
72 char **modname, char *namebuf)
73{
74 return NULL;
75}
76
77static inline int sprint_symbol(char *buffer, unsigned long addr)
78{
79 *buffer = '\0';
80 return 0;
81}
82
83static inline int sprint_backtrace(char *buffer, unsigned long addr)
84{
85 *buffer = '\0';
86 return 0;
87}
88
89static inline int lookup_symbol_name(unsigned long addr, char *symname)
90{
91 return -ERANGE;
92}
93
94static inline int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
95{
96 return -ERANGE;
97}
98
99/* Stupid that this does nothing, but I didn't create this mess. */
100#define __print_symbol(fmt, addr)
101#endif /*CONFIG_KALLSYMS*/
102
103/* This macro allows us to keep printk typechecking */
104static __printf(1, 2)
105void __check_printsym_format(const char *fmt, ...)
106{
107}
108
109static inline void print_symbol(const char *fmt, unsigned long addr)
110{
111 __check_printsym_format(fmt, "");
112 __print_symbol(fmt, (unsigned long)
113 __builtin_extract_return_addr((void *)addr));
114}
115
116static inline void print_ip_sym(unsigned long ip)
117{
118 printk("[<%p>] %pS\n", (void *) ip, (void *) ip);
119}
120
121#endif /*_LINUX_KALLSYMS_H*/