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/* 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/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, ...)

{

}

/* ia64 and ppc64 use function descriptors, which contain the real address */

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

#define print_fn_descriptor_symbol(fmt, addr)           \

do {                                            \

        unsigned long *__faddr = (unsigned long*) addr;         \

        print_symbol(fmt, __faddr[0]);           \

} while (0)

#else

#define print_fn_descriptor_symbol(fmt, addr) print_symbol(fmt, addr)

#endif

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));

}

#ifndef CONFIG_64BIT

#define print_ip_sym(ip)                \

do {                                    \

        printk("[<%08lx>]", ip);        \

        print_symbol(" %s\n", ip);      \

} while(0)

#else

#define print_ip_sym(ip)                \

do {                                    \

        printk("[<%016lx>]", ip);       \

        print_symbol(" %s\n", ip);      \

} while(0)

#endif

#endif /*_LINUX_KALLSYMS_H*/