/
ksyms.h
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/
ksyms.h
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/* $NetBSD: ksyms.h,v 1.14.36.1 2009/01/17 13:29:40 mjf Exp $ */
/*
* Copyright (c) 2001, 2003 Anders Magnusson (ragge@ludd.luth.se).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SYS_KSYMS_H_
#define _SYS_KSYMS_H_
#ifdef _KSYMS_PRIVATE
#define ELFSIZE ARCH_ELFSIZE
#include <sys/exec_elf.h>
#include <sys/queue.h>
struct ksyms_symtab {
TAILQ_ENTRY(ksyms_symtab) sd_queue; /* All active tables */
const char *sd_name; /* Name of this table */
Elf_Sym *sd_symstart; /* Address of symbol table */
uintptr_t sd_minsym; /* symbol with minimum value */
uintptr_t sd_maxsym; /* symbol with maximum value */
char *sd_strstart; /* Address of corresponding string table */
int sd_usroffset; /* Real address for userspace */
int sd_symsize; /* Size in bytes of symbol table */
int sd_strsize; /* Size of string table */
int sd_nglob; /* Number of global symbols */
bool sd_gone; /* dead but around for open() */
};
/*
* Static allocated ELF header.
* Basic info is filled in at attach, sizes at open.
*/
#define SYMTAB 1
#define STRTAB 2
#define SHSTRTAB 3
#define SHBSS 4
#define NSECHDR 5
#define NPRGHDR 1
#define SHSTRSIZ 32
struct ksyms_hdr {
Elf_Ehdr kh_ehdr;
Elf_Phdr kh_phdr[NPRGHDR];
Elf_Shdr kh_shdr[NSECHDR];
char kh_strtab[SHSTRSIZ];
};
#endif /* _KSYMS_PRIVATE */
/*
* Do a lookup of a symbol using the in-kernel lookup algorithm.
*/
struct ksyms_gsymbol {
const char *kg_name;
union {
void *ku_sym; /* Normally Elf_Sym */
unsigned long *ku_value;
} _un;
#define kg_sym _un.ku_sym
#define kg_value _un.ku_value
};
#define KIOCGSYMBOL _IOW('l', 1, struct ksyms_gsymbol)
#define KIOCGVALUE _IOW('l', 2, struct ksyms_gsymbol)
#define KIOCGSIZE _IOR('l', 3, int)
#ifdef _KERNEL
/*
* Definitions used in ksyms_getname() and ksyms_getval().
*/
#define KSYMS_CLOSEST 0001 /* Nearest lower match */
#define KSYMS_EXACT 0002 /* Only exact match allowed */
#define KSYMS_EXTERN 0000 /* Only external symbols (pseudo) */
#define KSYMS_PROC 0100 /* Procedures only */
#define KSYMS_ANY 0200 /* Also local symbols (DDB use only) */
/*
* Prototypes
*/
int ksyms_getname(const char **, const char **, vaddr_t, int);
int ksyms_getval(const char *, const char *, unsigned long *, int);
int ksyms_getval_unlocked(const char *, const char *, unsigned long *, int);
int ksyms_addsymtab(const char *, void *, vsize_t, char *, vsize_t);
int ksyms_delsymtab(const char *);
void ksyms_init(void);
void ksyms_addsyms_elf(int, void *, void *);
void ksyms_addsyms_explicit(void *, void *, size_t, void *, size_t);
int ksyms_sift(char *, char *, int);
void ksyms_modload(const char *, void *, vsize_t, char *, vsize_t);
void ksyms_modunload(const char *);
#endif /* _KERNEL */
#endif /* _SYS_KSYMS_H_ */