1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/* $NetBSD: ksyms.h,v 1.42 2021/09/11 10:09:55 riastradh 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_
#if !defined(ELFSIZE) && !defined(_RUMPKERNEL)
#define ELFSIZE KERN_ELFSIZE
#endif
#include <sys/exec_elf.h>
#ifdef _KSYMS_PRIVATE
#include <sys/ioccom.h>
#include <sys/queue.h>
#ifdef _KERNEL
#include <sys/pslist.h>
#endif
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() */
void *sd_ctfstart; /* Address of CTF contents */
int sd_ctfsize; /* Size in bytes of CTF contents */
uint32_t *sd_nmap; /* Name map for sorted symbols */
int sd_nmapsize; /* Total span of map */
#ifdef _KERNEL
struct pslist_entry sd_pslist;
#endif
};
/*
* Static allocated ELF header.
* Basic info is filled in at attach, sizes at open.
*/
#define SHNOTE 1
#define SYMTAB 2
#define STRTAB 3
#define SHSTRTAB 4
#define SHBSS 5
#define SHCTF 6
#define NSECHDR 7
#define NPRGHDR 1
#define SHSTRSIZ 64
struct ksyms_hdr {
Elf_Ehdr kh_ehdr;
Elf_Phdr kh_phdr[NPRGHDR];
Elf_Shdr kh_shdr[NSECHDR];
char kh_strtab[SHSTRSIZ];
/* 0=NameSize, 1=DescSize, 2=Tag, 3="NetB", 4="SD\0\0", 5=Version */
int32_t kh_note[6];
};
#endif /* _KSYMS_PRIVATE */
/*
* Do a lookup of a symbol using the in-kernel lookup algorithm.
*/
struct ksyms_ogsymbol {
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
};
#ifdef ELFSIZE
struct ksyms_gsymbol {
const char *kg_name;
union {
Elf_Sym ku_sym;
} _un;
};
#endif
struct ksyms_gvalue {
const char *kv_name;
uint64_t kv_value;
};
#define OKIOCGSYMBOL _IOW('l', 1, struct ksyms_ogsymbol)
#define OKIOCGVALUE _IOW('l', 2, struct ksyms_ogsymbol)
#define KIOCGSIZE _IOR('l', 3, int)
#define KIOCGVALUE _IOWR('l', 4, struct ksyms_gvalue)
#define KIOCGSYMBOL _IOWR('l', 5, struct ksyms_gsymbol)
#if defined(_KERNEL) || defined(_KMEMUSER)
/*
* 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) */
#if defined(_KERNEL)
typedef int (*ksyms_callback_t)(const char *, int, void *,
uint32_t, int, void *);
/*
* 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 *, Elf_Sym **,
unsigned long *, int);
struct ksyms_symtab *ksyms_get_mod(const char *);
int ksyms_mod_foreach(const char *mod, ksyms_callback_t, void *);
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);
bool ksyms_available(void);
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 /* _KERNEL || _KMEMUSER */
#endif /* _SYS_KSYMS_H_ */
|
