[net-next-2.6.git] / include / linux / kallsyms.h

/* 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*/
Commit	Line	Data
1da177e4 LT	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
40e48eed	8	#include <linux/errno.h>
5a75983e	9	#include <linux/stddef.h>
1da177e4	10
9281acea TH	11	#define KSYM_NAME_LEN 128
	12	#define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + (KSYM_NAME_LEN - 1) + \
	13	2(BITS_PER_LONG3/10) + (MODULE_NAME_LEN - 1) + 1)
1da177e4 LT	14
	15	#ifdef CONFIG_KALLSYMS
	16	/* Lookup the address for a symbol. Returns 0 if not found. */
	17	unsigned long kallsyms_lookup_name(const char *name);
	18
ffc50891 FBH	19	extern int kallsyms_lookup_size_offset(unsigned long addr,
	20	unsigned long *symbolsize,
	21	unsigned long *offset);
	22
1da177e4 LT	23	/* Lookup an address. modname is set to NULL if it's in the kernel. */
	24	const char *kallsyms_lookup(unsigned long addr,
	25	unsigned long *symbolsize,
	26	unsigned long *offset,
	27	char *modname, char namebuf);
	28
42e38083 RP	29	/* Look up a kernel symbol and return it in a text buffer. */
	30	extern int sprint_symbol(char *buffer, unsigned long address);
	31
	32	/* Look up a kernel symbol and print it to the kernel messages. */
1da177e4 LT	33	extern void __print_symbol(const char *fmt, unsigned long address);
1da177e4 LT	34
9d65cb4a	35	int lookup_symbol_name(unsigned long addr, char *symname);
a5c43dae	36	int lookup_symbol_attrs(unsigned long addr, unsigned long size, unsigned long offset, char modname, char name);
9d65cb4a	37
1da177e4 LT	38	#else /* !CONFIG_KALLSYMS */
	39
	40	static inline unsigned long kallsyms_lookup_name(const char *name)
	41	{
	42	return 0;
	43	}
	44
ffc50891 FBH	45	static inline int kallsyms_lookup_size_offset(unsigned long addr,
	46	unsigned long *symbolsize,
	47	unsigned long *offset)
	48	{
	49	return 0;
	50	}
	51
1da177e4 LT	52	static inline const char *kallsyms_lookup(unsigned long addr,
	53	unsigned long *symbolsize,
	54	unsigned long *offset,
	55	char *modname, char namebuf)
	56	{
	57	return NULL;
	58	}
	59
42e38083 RP	60	static inline int sprint_symbol(char *buffer, unsigned long addr)
	61	{
	62	*buffer = '\0';
	63	return 0;
	64	}
	65
9d65cb4a AD	66	static inline int lookup_symbol_name(unsigned long addr, char *symname)
	67	{
	68	return -ERANGE;
	69	}
	70
a5c43dae AD	71	static inline int lookup_symbol_attrs(unsigned long addr, unsigned long size, unsigned long offset, char modname, char name)
	72	{
	73	return -ERANGE;
	74	}
	75
1da177e4 LT	76	/* Stupid that this does nothing, but I didn't create this mess. */
	77	#define __print_symbol(fmt, addr)
	78	#endif /CONFIG_KALLSYMS/
	79
	80	/* This macro allows us to keep printk typechecking */
	81	static void __check_printsym_format(const char *fmt, ...)
	82	__attribute__((format(printf,1,2)));
	83	static inline void __check_printsym_format(const char *fmt, ...)
	84	{
	85	}
	86	/* ia64 and ppc64 use function descriptors, which contain the real address */
	87	#if defined(CONFIG_IA64) \|\| defined(CONFIG_PPC64)
	88	#define print_fn_descriptor_symbol(fmt, addr) \
	89	do { \
	90	unsigned long __faddr = (unsigned long) addr; \
	91	print_symbol(fmt, __faddr[0]); \
	92	} while (0)
	93	#else
	94	#define print_fn_descriptor_symbol(fmt, addr) print_symbol(fmt, addr)
	95	#endif
	96
b02454f4 HC	97	static inline void print_symbol(const char *fmt, unsigned long addr)
	98	{
	99	__check_printsym_format(fmt, "");
	100	__print_symbol(fmt, (unsigned long)
	101	__builtin_extract_return_addr((void *)addr));
	102	}
1da177e4	103
8d8fdf5c HC	104	#ifndef CONFIG_64BIT
	105	#define print_ip_sym(ip) \
	106	do { \
	107	printk("[<%08lx>]", ip); \
	108	print_symbol(" %s\n", ip); \
	109	} while(0)
	110	#else
	111	#define print_ip_sym(ip) \
	112	do { \
	113	printk("[<%016lx>]", ip); \
	114	print_symbol(" %s\n", ip); \
	115	} while(0)
	116	#endif
	117
1da177e4	118	#endif /_LINUX_KALLSYMS_H/