| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* Rewritten and vastly simplified by Rusty Russell for in-kernel |
| * module loader: |
| * Copyright 2002 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation |
| */ |
| #ifndef _LINUX_KALLSYMS_H |
| #define _LINUX_KALLSYMS_H |
| |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/stddef.h> |
| |
| #define KSYM_NAME_LEN 128 |
| #define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + (KSYM_NAME_LEN - 1) + \ |
| 2*(BITS_PER_LONG*3/10) + (MODULE_NAME_LEN - 1) + 1) |
| |
| struct module; |
| |
| #ifdef CONFIG_KALLSYMS |
| /* Lookup the address for a symbol. Returns 0 if not found. */ |
| unsigned long kallsyms_lookup_name(const char *name); |
| |
| /* Call a function on each kallsyms symbol in the core kernel */ |
| int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *, |
| unsigned long), |
| void *data); |
| |
| extern int kallsyms_lookup_size_offset(unsigned long addr, |
| unsigned long *symbolsize, |
| unsigned long *offset); |
| |
| /* Lookup an address. modname is set to NULL if it's in the kernel. */ |
| const char *kallsyms_lookup(unsigned long addr, |
| unsigned long *symbolsize, |
| unsigned long *offset, |
| char **modname, char *namebuf); |
| |
| /* Look up a kernel symbol and return it in a text buffer. */ |
| extern int sprint_symbol(char *buffer, unsigned long address); |
| extern int sprint_symbol_no_offset(char *buffer, unsigned long address); |
| extern int sprint_backtrace(char *buffer, unsigned long address); |
| |
| /* Look up a kernel symbol and print it to the kernel messages. */ |
| extern void __print_symbol(const char *fmt, unsigned long address); |
| |
| int lookup_symbol_name(unsigned long addr, char *symname); |
| int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); |
| |
| /* How and when do we show kallsyms values? */ |
| extern int kallsyms_show_value(void); |
| |
| #else /* !CONFIG_KALLSYMS */ |
| |
| static inline unsigned long kallsyms_lookup_name(const char *name) |
| { |
| return 0; |
| } |
| |
| static inline int kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
| struct module *, |
| unsigned long), |
| void *data) |
| { |
| return 0; |
| } |
| |
| static inline int kallsyms_lookup_size_offset(unsigned long addr, |
| unsigned long *symbolsize, |
| unsigned long *offset) |
| { |
| return 0; |
| } |
| |
| static inline const char *kallsyms_lookup(unsigned long addr, |
| unsigned long *symbolsize, |
| unsigned long *offset, |
| char **modname, char *namebuf) |
| { |
| return NULL; |
| } |
| |
| static inline int sprint_symbol(char *buffer, unsigned long addr) |
| { |
| *buffer = '\0'; |
| return 0; |
| } |
| |
| static inline int sprint_symbol_no_offset(char *buffer, unsigned long addr) |
| { |
| *buffer = '\0'; |
| return 0; |
| } |
| |
| static inline int sprint_backtrace(char *buffer, unsigned long addr) |
| { |
| *buffer = '\0'; |
| return 0; |
| } |
| |
| static inline int lookup_symbol_name(unsigned long addr, char *symname) |
| { |
| return -ERANGE; |
| } |
| |
| static inline int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) |
| { |
| return -ERANGE; |
| } |
| |
| static inline int kallsyms_show_value(void) |
| { |
| return false; |
| } |
| |
| /* Stupid that this does nothing, but I didn't create this mess. */ |
| #define __print_symbol(fmt, addr) |
| #endif /*CONFIG_KALLSYMS*/ |
| |
| /* This macro allows us to keep printk typechecking */ |
| static __printf(1, 2) |
| void __check_printsym_format(const char *fmt, ...) |
| { |
| } |
| |
| static inline void print_symbol(const char *fmt, unsigned long addr) |
| { |
| __check_printsym_format(fmt, ""); |
| __print_symbol(fmt, (unsigned long) |
| __builtin_extract_return_addr((void *)addr)); |
| } |
| |
| static inline void print_ip_sym(unsigned long ip) |
| { |
| printk("[<%p>] %pS\n", (void *) ip, (void *) ip); |
| } |
| |
| #endif /*_LINUX_KALLSYMS_H*/ |