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1da177e4 LT |
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*/ |