Release 4.17 include/linux/kallsyms.h

Directory: include/linux
/* 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>
#include <linux/mm.h>
#include <linux/module.h>

#include <asm/sections.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;



static inline int is_kernel_inittext(unsigned long addr)
{
	if (addr >= (unsigned long)_sinittext
	    && addr <= (unsigned long)_einittext)
		return 1;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Sergey Senozhatsky 35 100.00% 1 100.00%
Total 35 100.00% 1 100.00%



static inline int is_kernel_text(unsigned long addr)
{
	if ((addr >= (unsigned long)_stext && addr <= (unsigned long)_etext) ||
	    arch_is_kernel_text(addr))
		return 1;
	return in_gate_area_no_mm(addr);
}

Contributors
Person Tokens Prop Commits CommitProp
Sergey Senozhatsky 45 100.00% 1 100.00%
Total 45 100.00% 1 100.00%



static inline int is_kernel(unsigned long addr)
{
	if (addr >= (unsigned long)_stext && addr <= (unsigned long)_end)
		return 1;
	return in_gate_area_no_mm(addr);
}

Contributors
Person Tokens Prop Commits CommitProp
Sergey Senozhatsky 38 100.00% 1 100.00%
Total 38 100.00% 1 100.00%



static inline int is_ksym_addr(unsigned long addr)
{
	if (IS_ENABLED(CONFIG_KALLSYMS_ALL))
		return is_kernel(addr);

	return is_kernel_text(addr) || is_kernel_inittext(addr);
}

Contributors
Person Tokens Prop Commits CommitProp
Sergey Senozhatsky 35 100.00% 1 100.00%
Total 35 100.00% 1 100.00%



static inline void *dereference_symbol_descriptor(void *ptr)
{
#ifdef HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR
	struct module *mod;

	ptr = dereference_kernel_function_descriptor(ptr);
	if (is_ksym_addr((unsigned long)ptr))
		return ptr;

	preempt_disable();
	mod = __module_address((unsigned long)ptr);
	preempt_enable();

	if (mod)
		ptr = dereference_module_function_descriptor(mod, ptr);
#endif
	return ptr;
}

Contributors
Person Tokens Prop Commits CommitProp
Sergey Senozhatsky 76 100.00% 1 100.00%
Total 76 100.00% 1 100.00%

#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);

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;
}

Contributors
Person Tokens Prop Commits CommitProp
Andrew Morton 16 100.00% 1 100.00%
Total 16 100.00% 1 100.00%



static inline int kallsyms_on_each_symbol(int (*fn)(void *, const char *,
						    struct module *,
						    unsigned long),
					  void *data)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Anders H Kaseorg 35 100.00% 1 100.00%
Total 35 100.00% 1 100.00%



static inline int kallsyms_lookup_size_offset(unsigned long addr,
					      unsigned long *symbolsize,
					      unsigned long *offset)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Franck Bui-Huu 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static inline const char *kallsyms_lookup(unsigned long addr,
					  unsigned long *symbolsize,
					  unsigned long *offset,
					  char **modname, char *namebuf)
{
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Ingo Molnar 24 68.57% 1 33.33%
Rusty Russell 7 20.00% 1 33.33%
Andi Kleen 4 11.43% 1 33.33%
Total 35 100.00% 3 100.00%



static inline int sprint_symbol(char *buffer, unsigned long addr)
{
	*buffer = '\0';
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Robert S Peterson 23 100.00% 1 100.00%
Total 23 100.00% 1 100.00%



static inline int sprint_symbol_no_offset(char *buffer, unsigned long addr)
{
	*buffer = '\0';
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Stephen Boyd 23 100.00% 1 100.00%
Total 23 100.00% 1 100.00%



static inline int sprint_backtrace(char *buffer, unsigned long addr)
{
	*buffer = '\0';
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Namhyung Kim 23 100.00% 1 100.00%
Total 23 100.00% 1 100.00%



static inline int lookup_symbol_name(unsigned long addr, char *symname)
{
	return -ERANGE;
}

Contributors
Person Tokens Prop Commits CommitProp
Alexey Dobriyan 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%



static inline int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
{
	return -ERANGE;
}

Contributors
Person Tokens Prop Commits CommitProp
Alexey Dobriyan 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



static inline int kallsyms_show_value(void)
{
	return false;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnd Bergmann 12 100.00% 1 100.00%
Total 12 100.00% 1 100.00%

#endif /*CONFIG_KALLSYMS*/



static inline void print_ip_sym(unsigned long ip)
{
	printk("[<%px>] %pS\n", (void *) ip, (void *) ip);
}

Contributors
Person Tokens Prop Commits CommitProp
Vegard Nossum 18 64.29% 2 40.00%
Sergey Senozhatsky 7 25.00% 1 20.00%
Heiko Carstens 2 7.14% 1 20.00%
Huacai Chen 1 3.57% 1 20.00%
Total 28 100.00% 5 100.00%

#endif /*_LINUX_KALLSYMS_H*/
Overall Contributors
Person Tokens Prop Commits CommitProp
Sergey Senozhatsky 245 33.79% 2 8.70%
Alexey Dobriyan 90 12.41% 2 8.70%
Anders H Kaseorg 68 9.38% 1 4.35%
Ingo Molnar 56 7.72% 1 4.35%
Franck Bui-Huu 43 5.93% 1 4.35%
Robert S Peterson 40 5.52% 1 4.35%
Namhyung Kim 36 4.97% 1 4.35%
Stephen Boyd 36 4.97% 1 4.35%
Andrew Morton 27 3.72% 1 4.35%
Vegard Nossum 21 2.90% 2 8.70%
Arnd Bergmann 20 2.76% 1 4.35%
Rusty Russell 20 2.76% 1 4.35%
Andi Kleen 8 1.10% 1 4.35%
Kamalesh Babulal 3 0.41% 1 4.35%
Mika Kukkonen 3 0.41% 1 4.35%
Adrian Bunk 3 0.41% 1 4.35%
Heiko Carstens 2 0.28% 1 4.35%
Tejun Heo 2 0.28% 1 4.35%
Greg Kroah-Hartman 1 0.14% 1 4.35%
Huacai Chen 1 0.14% 1 4.35%
Total 725 100.00% 23 100.00%
Directory: include/linux

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Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Sergey Senozhatsky	35	100.00%	1	100.00%
Total	35	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.17 include/linux/kallsyms.h

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