/* 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)

#ifdef CONFIG_KALLSYMS

/* Lookup the address for a symbol. Returns 0 if not found. */

unsigned long kallsyms_lookup_name(const char *name);

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);

/* 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);

#else /* !CONFIG_KALLSYMS */

static inline unsigned long kallsyms_lookup_name(const char *name)

{

	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 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;

}

/* 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 void __check_printsym_format(const char *fmt, ...)

__attribute__((format(printf,1,2)));

static inline 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));

}

/*

 * Pretty-print a function pointer.  This function is deprecated.

 * Please use the "%pF" vsprintf format instead.

 */

static inline void __deprecated print_fn_descriptor_symbol(const char *fmt, void *addr)

{

#if defined(CONFIG_IA64) || defined(CONFIG_PPC64)

	addr = *(void **)addr;

#endif

	print_symbol(fmt, (unsigned long)addr);

}

static inline void print_ip_sym(unsigned long ip)

{

	printk("[<%p>] %pS\n", (void *) ip, (void *) ip);

}

#endif /*_LINUX_KALLSYMS_H*/