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
165
166
167
168
|
/* $OpenBSD: resolve.h,v 1.9 2002/05/24 03:44:37 deraadt Exp $ */
/*
* Copyright (c) 1998 Per Fogelstrom, Opsycon AB
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed under OpenBSD by
* Per Fogelstrom, Opsycon AB, Sweden.
* 4. 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 _RESOLVE_H_
#define _RESOLVE_H_
#include <link.h>
typedef struct load_list {
struct load_list *next;
char *start;
size_t size;
int prot;
} load_list_t;
/*
* Structure describing a loaded object.
* The head of this struct must be compatible
* with struct link_map in sys/link.h
*/
typedef struct elf_object {
Elf_Addr load_addr; /* Real load address */
Elf_Addr load_offs; /* Load offset from link address */
char *load_name; /* Pointer to object name */
Elf_Dyn *load_dyn; /* Pointer to object dynamic data */
struct elf_object *next;
struct elf_object *prev;
/* End struct link_map compatible */
load_list_t *load_list;
u_int32_t load_size;
union {
u_long info[DT_NUM + DT_PROCNUM];
struct {
Elf_Addr null; /* Not used */
Elf_Addr needed; /* Not used */
Elf_Addr pltrelsz;
Elf_Addr *pltgot;
Elf_Addr *hash;
const char *strtab;
const Elf_Sym *symtab;
Elf_RelA *rela;
Elf_Addr relasz;
Elf_Addr relaent;
Elf_Addr strsz;
Elf_Addr syment;
void (*init)(void);
void (*fini)(void);
const char *soname;
const char *rpath;
Elf_Addr symbolic;
Elf_Rel *rel;
Elf_Addr relsz;
Elf_Addr relent;
Elf_Addr pltrel;
Elf_Addr debug;
Elf_Addr textrel;
Elf_Addr jmprel;
Elf_Addr bind_now;
} u;
} Dyn;
#define dyn Dyn.u
struct elf_object *dep_next; /* Shadow objects for resolve search */
int status;
#define STAT_RELOC_DONE 1
#define STAT_GOT_DONE 2
#define STAT_INIT_DONE 4
Elf_Phdr *phdrp;
int phdrc;
int refcount;
int obj_type;
#define OBJTYPE_LDR 1
#define OBJTYPE_EXE 2
#define OBJTYPE_LIB 3
#define OBJTYPE_DLO 4
Elf_Word *buckets;
u_int32_t nbuckets;
Elf_Word *chains;
u_int32_t nchains;
Elf_Dyn *dynamic;
} elf_object_t;
extern void _dl_rt_resolve(void);
extern elf_object_t *_dl_add_object(const char *objname, Elf_Dyn *dynp,
const u_long *, const int objtype,
const long laddr, const long loff);
extern void _dl_remove_object(elf_object_t *object);
extern elf_object_t *_dl_lookup_object(const char *objname);
extern elf_object_t *_dl_load_shlib(const char *, elf_object_t *, int);
extern void _dl_unload_shlib(elf_object_t *object);
extern int _dl_md_reloc(elf_object_t *object, int rel, int relsz);
extern void _dl_md_reloc_got(elf_object_t *object, int lazy);
Elf_Addr _dl_find_symbol(const char *name, elf_object_t *startlook,
const Elf_Sym **ref, int myself, int warnnotfound);
void _dl_rtld(elf_object_t *object);
void _dl_call_init(elf_object_t *object);
extern elf_object_t *_dl_objects;
extern elf_object_t *_dl_last_object;
extern const char *_dl_progname;
extern struct r_debug *_dl_debug_map;
extern int _dl_pagesz;
extern int _dl_errno;
extern char *_dl_libpath;
extern char *_dl_preload;
extern char *_dl_bindnow;
extern char *_dl_traceld;
extern char *_dl_debug;
#define DL_DEB(P) do { if (_dl_debug) _dl_printf P ; } while (0)
#define DL_NOT_FOUND 1
#define DL_CANT_OPEN 2
#define DL_NOT_ELF 3
#define DL_CANT_OPEN_REF 4
#define DL_CANT_MMAP 5
#define DL_NO_SYMBOL 6
#define DL_INVALID_HANDLE 7
#define DL_INVALID_CTL 8
#endif /* _RESOLVE_H_ */
|
