Don't include linux/config.h from anywhere else in include/
[linux-2.6.git] / include / linux / kallsyms.h
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
9 #define KSYM_NAME_LEN 127
10
11 #ifdef CONFIG_KALLSYMS
12 /* Lookup the address for a symbol. Returns 0 if not found. */
13 unsigned long kallsyms_lookup_name(const char *name);
14
15 /* Lookup an address.  modname is set to NULL if it's in the kernel. */
16 const char *kallsyms_lookup(unsigned long addr,
17                             unsigned long *symbolsize,
18                             unsigned long *offset,
19                             char **modname, char *namebuf);
20
21 /* Replace "%s" in format with address, if found */
22 extern void __print_symbol(const char *fmt, unsigned long address);
23
24 #else /* !CONFIG_KALLSYMS */
25
26 static inline unsigned long kallsyms_lookup_name(const char *name)
27 {
28         return 0;
29 }
30
31 static inline const char *kallsyms_lookup(unsigned long addr,
32                                           unsigned long *symbolsize,
33                                           unsigned long *offset,
34                                           char **modname, char *namebuf)
35 {
36         return NULL;
37 }
38
39 /* Stupid that this does nothing, but I didn't create this mess. */
40 #define __print_symbol(fmt, addr)
41 #endif /*CONFIG_KALLSYMS*/
42
43 /* This macro allows us to keep printk typechecking */
44 static void __check_printsym_format(const char *fmt, ...)
45 __attribute__((format(printf,1,2)));
46 static inline void __check_printsym_format(const char *fmt, ...)
47 {
48 }
49 /* ia64 and ppc64 use function descriptors, which contain the real address */
50 #if defined(CONFIG_IA64) || defined(CONFIG_PPC64)
51 #define print_fn_descriptor_symbol(fmt, addr)           \
52 do {                                            \
53         unsigned long *__faddr = (unsigned long*) addr;         \
54         print_symbol(fmt, __faddr[0]);          \
55 } while (0)
56 #else
57 #define print_fn_descriptor_symbol(fmt, addr) print_symbol(fmt, addr)
58 #endif
59
60 #define print_symbol(fmt, addr)                 \
61 do {                                            \
62         __check_printsym_format(fmt, "");       \
63         __print_symbol(fmt, addr);              \
64 } while(0)
65
66 #endif /*_LINUX_KALLSYMS_H*/