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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 | ||
40e48eed | 8 | #include <linux/errno.h> |
1da177e4 LT |
9 | |
10 | #define KSYM_NAME_LEN 127 | |
42e38083 RP |
11 | #define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + KSYM_NAME_LEN + \ |
12 | 2*(BITS_PER_LONG*3/10) + MODULE_NAME_LEN + 1) | |
1da177e4 LT |
13 | |
14 | #ifdef CONFIG_KALLSYMS | |
15 | /* Lookup the address for a symbol. Returns 0 if not found. */ | |
16 | unsigned long kallsyms_lookup_name(const char *name); | |
17 | ||
ffc50891 FBH |
18 | extern int kallsyms_lookup_size_offset(unsigned long addr, |
19 | unsigned long *symbolsize, | |
20 | unsigned long *offset); | |
21 | ||
1da177e4 LT |
22 | /* Lookup an address. modname is set to NULL if it's in the kernel. */ |
23 | const char *kallsyms_lookup(unsigned long addr, | |
24 | unsigned long *symbolsize, | |
25 | unsigned long *offset, | |
26 | char **modname, char *namebuf); | |
27 | ||
42e38083 RP |
28 | /* Look up a kernel symbol and return it in a text buffer. */ |
29 | extern int sprint_symbol(char *buffer, unsigned long address); | |
30 | ||
31 | /* Look up a kernel symbol and print it to the kernel messages. */ | |
1da177e4 LT |
32 | extern void __print_symbol(const char *fmt, unsigned long address); |
33 | ||
9d65cb4a | 34 | int lookup_symbol_name(unsigned long addr, char *symname); |
a5c43dae | 35 | int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); |
9d65cb4a | 36 | |
1da177e4 LT |
37 | #else /* !CONFIG_KALLSYMS */ |
38 | ||
39 | static inline unsigned long kallsyms_lookup_name(const char *name) | |
40 | { | |
41 | return 0; | |
42 | } | |
43 | ||
ffc50891 FBH |
44 | static inline int kallsyms_lookup_size_offset(unsigned long addr, |
45 | unsigned long *symbolsize, | |
46 | unsigned long *offset) | |
47 | { | |
48 | return 0; | |
49 | } | |
50 | ||
1da177e4 LT |
51 | static 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 | ||
42e38083 RP |
59 | static inline int sprint_symbol(char *buffer, unsigned long addr) |
60 | { | |
61 | *buffer = '\0'; | |
62 | return 0; | |
63 | } | |
64 | ||
9d65cb4a AD |
65 | static inline int lookup_symbol_name(unsigned long addr, char *symname) |
66 | { | |
67 | return -ERANGE; | |
68 | } | |
69 | ||
a5c43dae AD |
70 | static inline int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) |
71 | { | |
72 | return -ERANGE; | |
73 | } | |
74 | ||
1da177e4 LT |
75 | /* 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 */ | |
80 | static void __check_printsym_format(const char *fmt, ...) | |
81 | __attribute__((format(printf,1,2))); | |
82 | static 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) \ | |
88 | do { \ | |
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 | ||
b02454f4 HC |
96 | static 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 | } | |
1da177e4 | 102 | |
8d8fdf5c HC |
103 | #ifndef CONFIG_64BIT |
104 | #define print_ip_sym(ip) \ | |
105 | do { \ | |
106 | printk("[<%08lx>]", ip); \ | |
107 | print_symbol(" %s\n", ip); \ | |
108 | } while(0) | |
109 | #else | |
110 | #define print_ip_sym(ip) \ | |
111 | do { \ | |
112 | printk("[<%016lx>]", ip); \ | |
113 | print_symbol(" %s\n", ip); \ | |
114 | } while(0) | |
115 | #endif | |
116 | ||
1da177e4 | 117 | #endif /*_LINUX_KALLSYMS_H*/ |