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 16struct module; 17 18#ifdef CONFIG_KALLSYMS 19/* Lookup the address for a symbol. Returns 0 if not found. */ 20unsigned long kallsyms_lookup_name(const char *name); 21 22/* Call a function on each kallsyms symbol in the core kernel */ 23int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *, 24 unsigned long), 25 void *data); 26 27extern 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. */ 32const 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. */ 38extern int sprint_symbol(char *buffer, unsigned long address); 39 40/* Look up a kernel symbol and print it to the kernel messages. */ 41extern void __print_symbol(const char *fmt, unsigned long address); 42 43int lookup_symbol_name(unsigned long addr, char *symname); 44int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); 45 46#else /* !CONFIG_KALLSYMS */ 47 48static inline unsigned long kallsyms_lookup_name(const char *name) 49{ 50 return 0; 51} 52 53static 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 61static inline int kallsyms_lookup_size_offset(unsigned long addr, 62 unsigned long *symbolsize, 63 unsigned long *offset) 64{ 65 return 0; 66} 67 68static 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 76static inline int sprint_symbol(char *buffer, unsigned long addr) 77{ 78 *buffer = '\0'; 79 return 0; 80} 81 82static inline int lookup_symbol_name(unsigned long addr, char *symname) 83{ 84 return -ERANGE; 85} 86 87static 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 */ 97static void __check_printsym_format(const char *fmt, ...) 98__attribute__((format(printf,1,2))); 99static inline void __check_printsym_format(const char *fmt, ...) 100{ 101} 102 103static 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 110static 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