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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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
Adrian Bunk40e48ee2007-07-07 00:54:09 +02008#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
Tejun Heo9281ace2007-07-17 04:03:51 -070010#define KSYM_NAME_LEN 128
11#define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + (KSYM_NAME_LEN - 1) + \
12 2*(BITS_PER_LONG*3/10) + (MODULE_NAME_LEN - 1) + 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
14#ifdef CONFIG_KALLSYMS
15/* Lookup the address for a symbol. Returns 0 if not found. */
16unsigned long kallsyms_lookup_name(const char *name);
17
Franck Bui-Huuffc50892006-10-03 01:13:48 -070018extern int kallsyms_lookup_size_offset(unsigned long addr,
19 unsigned long *symbolsize,
20 unsigned long *offset);
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022/* Lookup an address. modname is set to NULL if it's in the kernel. */
23const char *kallsyms_lookup(unsigned long addr,
24 unsigned long *symbolsize,
25 unsigned long *offset,
26 char **modname, char *namebuf);
27
Robert Peterson42e38082007-04-30 15:09:48 -070028/* Look up a kernel symbol and return it in a text buffer. */
29extern int sprint_symbol(char *buffer, unsigned long address);
30
31/* Look up a kernel symbol and print it to the kernel messages. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070032extern void __print_symbol(const char *fmt, unsigned long address);
33
Alexey Dobriyan9d65cb42007-05-08 00:28:43 -070034int lookup_symbol_name(unsigned long addr, char *symname);
Alexey Dobriyana5c43da2007-05-08 00:28:47 -070035int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
Alexey Dobriyan9d65cb42007-05-08 00:28:43 -070036
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#else /* !CONFIG_KALLSYMS */
38
39static inline unsigned long kallsyms_lookup_name(const char *name)
40{
41 return 0;
42}
43
Franck Bui-Huuffc50892006-10-03 01:13:48 -070044static inline int kallsyms_lookup_size_offset(unsigned long addr,
45 unsigned long *symbolsize,
46 unsigned long *offset)
47{
48 return 0;
49}
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051static inline const char *kallsyms_lookup(unsigned long addr,
52 unsigned long *symbolsize,
53 unsigned long *offset,
54 char **modname, char *namebuf)
55{
56 return NULL;
57}
58
Robert Peterson42e38082007-04-30 15:09:48 -070059static inline int sprint_symbol(char *buffer, unsigned long addr)
60{
61 *buffer = '\0';
62 return 0;
63}
64
Alexey Dobriyan9d65cb42007-05-08 00:28:43 -070065static inline int lookup_symbol_name(unsigned long addr, char *symname)
66{
67 return -ERANGE;
68}
69
Alexey Dobriyana5c43da2007-05-08 00:28:47 -070070static inline int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
71{
72 return -ERANGE;
73}
74
Linus Torvalds1da177e2005-04-16 15:20:36 -070075/* Stupid that this does nothing, but I didn't create this mess. */
76#define __print_symbol(fmt, addr)
77#endif /*CONFIG_KALLSYMS*/
78
79/* This macro allows us to keep printk typechecking */
80static void __check_printsym_format(const char *fmt, ...)
81__attribute__((format(printf,1,2)));
82static inline void __check_printsym_format(const char *fmt, ...)
83{
84}
85/* ia64 and ppc64 use function descriptors, which contain the real address */
86#if defined(CONFIG_IA64) || defined(CONFIG_PPC64)
87#define print_fn_descriptor_symbol(fmt, addr) \
88do { \
89 unsigned long *__faddr = (unsigned long*) addr; \
90 print_symbol(fmt, __faddr[0]); \
91} while (0)
92#else
93#define print_fn_descriptor_symbol(fmt, addr) print_symbol(fmt, addr)
94#endif
95
Heiko Carstensb02454f2006-07-03 00:24:06 -070096static inline void print_symbol(const char *fmt, unsigned long addr)
97{
98 __check_printsym_format(fmt, "");
99 __print_symbol(fmt, (unsigned long)
100 __builtin_extract_return_addr((void *)addr));
101}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Heiko Carstens8d8fdf52006-07-03 00:24:25 -0700103#ifndef CONFIG_64BIT
104#define print_ip_sym(ip) \
105do { \
106 printk("[<%08lx>]", ip); \
107 print_symbol(" %s\n", ip); \
108} while(0)
109#else
110#define print_ip_sym(ip) \
111do { \
112 printk("[<%016lx>]", ip); \
113 print_symbol(" %s\n", ip); \
114} while(0)
115#endif
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117#endif /*_LINUX_KALLSYMS_H*/