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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/errno.h> |
9 | #include <linux/kernel.h> |
10 | #include <linux/stddef.h> |
11 | |
12 | #define KSYM_NAME_LEN 128 |
13 | #define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + (KSYM_NAME_LEN - 1) + \ |
14 | 2*(BITS_PER_LONG*3/10) + (MODULE_NAME_LEN - 1) + 1) |
15 | |
16 | struct module; |
17 | |
18 | #ifdef CONFIG_KALLSYMS |
19 | /* Lookup the address for a symbol. Returns 0 if not found. */ |
20 | unsigned long kallsyms_lookup_name(const char *name); |
21 | |
22 | /* Call a function on each kallsyms symbol in the core kernel */ |
23 | int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *, |
24 | unsigned long), |
25 | void *data); |
26 | |
27 | extern int kallsyms_lookup_size_offset(unsigned long addr, |
28 | unsigned long *symbolsize, |
29 | unsigned long *offset); |
30 | |
31 | /* Lookup an address. modname is set to NULL if it's in the kernel. */ |
32 | const char *kallsyms_lookup(unsigned long addr, |
33 | unsigned long *symbolsize, |
34 | unsigned long *offset, |
35 | char **modname, char *namebuf); |
36 | |
37 | /* Look up a kernel symbol and return it in a text buffer. */ |
38 | extern int sprint_symbol(char *buffer, unsigned long address); |
39 | |
40 | /* Look up a kernel symbol and print it to the kernel messages. */ |
41 | extern void __print_symbol(const char *fmt, unsigned long address); |
42 | |
43 | int lookup_symbol_name(unsigned long addr, char *symname); |
44 | int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); |
45 | |
46 | #else /* !CONFIG_KALLSYMS */ |
47 | |
48 | static inline unsigned long kallsyms_lookup_name(const char *name) |
49 | { |
50 | return 0; |
51 | } |
52 | |
53 | static inline int kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
54 | struct module *, |
55 | unsigned long), |
56 | void *data) |
57 | { |
58 | return 0; |
59 | } |
60 | |
61 | static inline int kallsyms_lookup_size_offset(unsigned long addr, |
62 | unsigned long *symbolsize, |
63 | unsigned long *offset) |
64 | { |
65 | return 0; |
66 | } |
67 | |
68 | static inline const char *kallsyms_lookup(unsigned long addr, |
69 | unsigned long *symbolsize, |
70 | unsigned long *offset, |
71 | char **modname, char *namebuf) |
72 | { |
73 | return NULL; |
74 | } |
75 | |
76 | static inline int sprint_symbol(char *buffer, unsigned long addr) |
77 | { |
78 | *buffer = '\0'; |
79 | return 0; |
80 | } |
81 | |
82 | static inline int lookup_symbol_name(unsigned long addr, char *symname) |
83 | { |
84 | return -ERANGE; |
85 | } |
86 | |
87 | static inline int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) |
88 | { |
89 | return -ERANGE; |
90 | } |
91 | |
92 | /* Stupid that this does nothing, but I didn't create this mess. */ |
93 | #define __print_symbol(fmt, addr) |
94 | #endif /*CONFIG_KALLSYMS*/ |
95 | |
96 | /* This macro allows us to keep printk typechecking */ |
97 | static void __check_printsym_format(const char *fmt, ...) |
98 | __attribute__((format(printf,1,2))); |
99 | static inline void __check_printsym_format(const char *fmt, ...) |
100 | { |
101 | } |
102 | |
103 | static inline void print_symbol(const char *fmt, unsigned long addr) |
104 | { |
105 | __check_printsym_format(fmt, ""); |
106 | __print_symbol(fmt, (unsigned long) |
107 | __builtin_extract_return_addr((void *)addr)); |
108 | } |
109 | |
110 | static inline void print_ip_sym(unsigned long ip) |
111 | { |
112 | printk("[<%p>] %pS\n", (void *) ip, (void *) ip); |
113 | } |
114 | |
115 | #endif /*_LINUX_KALLSYMS_H*/ |
116 |
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