75a66614db
Impact: New API kallsyms_lookup_name only returns the first match that it finds. Ksplice needs information about all symbols with a given name in order to correctly resolve local symbols. kallsyms_on_each_symbol provides a generic mechanism for iterating over the kallsyms table. Cc: Jeff Arnold <jbarnold@mit.edu> Cc: Tim Abbott <tabbott@mit.edu> Signed-off-by: Anders Kaseorg <andersk@mit.edu> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/* 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);
|
|
|
|
/* 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_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 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*/
|