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 #ifdef CONFIG_KALLSYMS
17 /* Lookup the address for a symbol. Returns 0 if not found. */
18 unsigned long kallsyms_lookup_name(const char *name);
19
20 extern int kallsyms_lookup_size_offset(unsigned long addr,
21 unsigned long *symbolsize,
22 unsigned long *offset);
23
24 /* Lookup an address. modname is set to NULL if it's in the kernel. */
25 const char *kallsyms_lookup(unsigned long addr,
26 unsigned long *symbolsize,
27 unsigned long *offset,
28 char **modname, char *namebuf);
29
30 /* Look up a kernel symbol and return it in a text buffer. */
31 extern int sprint_symbol(char *buffer, unsigned long address);
32
33 /* Look up a kernel symbol and print it to the kernel messages. */
34 extern void __print_symbol(const char *fmt, unsigned long address);
35
36 int lookup_symbol_name(unsigned long addr, char *symname);
37 int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
38
39 #else /* !CONFIG_KALLSYMS */
40
kallsyms_lookup_name(const char * name)41 static inline unsigned long kallsyms_lookup_name(const char *name)
42 {
43 return 0;
44 }
45
kallsyms_lookup_size_offset(unsigned long addr,unsigned long * symbolsize,unsigned long * offset)46 static inline int kallsyms_lookup_size_offset(unsigned long addr,
47 unsigned long *symbolsize,
48 unsigned long *offset)
49 {
50 return 0;
51 }
52
kallsyms_lookup(unsigned long addr,unsigned long * symbolsize,unsigned long * offset,char ** modname,char * namebuf)53 static inline const char *kallsyms_lookup(unsigned long addr,
54 unsigned long *symbolsize,
55 unsigned long *offset,
56 char **modname, char *namebuf)
57 {
58 return NULL;
59 }
60
sprint_symbol(char * buffer,unsigned long addr)61 static inline int sprint_symbol(char *buffer, unsigned long addr)
62 {
63 *buffer = '\0';
64 return 0;
65 }
66
lookup_symbol_name(unsigned long addr,char * symname)67 static inline int lookup_symbol_name(unsigned long addr, char *symname)
68 {
69 return -ERANGE;
70 }
71
lookup_symbol_attrs(unsigned long addr,unsigned long * size,unsigned long * offset,char * modname,char * name)72 static inline int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
73 {
74 return -ERANGE;
75 }
76
77 /* Stupid that this does nothing, but I didn't create this mess. */
78 #define __print_symbol(fmt, addr)
79 #endif /*CONFIG_KALLSYMS*/
80
81 /* This macro allows us to keep printk typechecking */
82 static void __check_printsym_format(const char *fmt, ...)
83 __attribute__((format(printf,1,2)));
__check_printsym_format(const char * fmt,...)84 static inline void __check_printsym_format(const char *fmt, ...)
85 {
86 }
87
print_symbol(const char * fmt,unsigned long addr)88 static inline void print_symbol(const char *fmt, unsigned long addr)
89 {
90 __check_printsym_format(fmt, "");
91 __print_symbol(fmt, (unsigned long)
92 __builtin_extract_return_addr((void *)addr));
93 }
94
95 /*
96 * Pretty-print a function pointer. This function is deprecated.
97 * Please use the "%pF" vsprintf format instead.
98 */
print_fn_descriptor_symbol(const char * fmt,void * addr)99 static inline void __deprecated print_fn_descriptor_symbol(const char *fmt, void *addr)
100 {
101 #if defined(CONFIG_IA64) || defined(CONFIG_PPC64)
102 addr = *(void **)addr;
103 #endif
104 print_symbol(fmt, (unsigned long)addr);
105 }
106
print_ip_sym(unsigned long ip)107 static inline void print_ip_sym(unsigned long ip)
108 {
109 printk("[<%p>] %pS\n", (void *) ip, (void *) ip);
110 }
111
112 #endif /*_LINUX_KALLSYMS_H*/
113