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