resolve.h revision 1.1 
1/*	$OpenBSD: resolve.h,v 1.1 2000/06/13 03:34:09 rahnds Exp $ */
2
3/*
4 * Copyright (c) 1998 Per Fogelstrom, Opsycon AB
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed under OpenBSD by
17 *	Per Fogelstrom, Opsycon AB, Sweden.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 */
34
35#ifndef _RESOLVE_H_
36#define _RESOLVE_H_
37
38#include <link.h>
39
40
41/*
42 *  Structure describing a loaded object.
43 *  The head of this struct must be compatible
44 *  with struct link_map in sys/link.h
45 */
46typedef struct elf_object {
47	Elf32_Addr load_addr;		/* Real load address */
48	Elf32_Addr load_offs;		/* Load offset from link address */
49	char	   *load_name;		/* Pointer to object name */
50	Elf32_Dyn  *load_dyn;		/* Pointer to object dynamic data */
51	struct elf_object *next;
52	struct elf_object *prev;
53/* End struct link_map compatible */
54
55	u_int32_t  load_size;
56
57	union {
58		u_int32_t	info[DT_NUM + DT_PROCNUM];
59		struct {
60			Elf32_Word	null;		/* Not used */
61			Elf32_Word	needed;		/* Not used */
62			Elf32_Word	pltrelsz;
63			Elf32_Word	*pltgot;
64			Elf32_Word	*hash;
65			const char	*strtab;
66			const Elf32_Sym	*symtab;
67			Elf32_Rela	*rela;
68			Elf32_Word	relasz;
69			Elf32_Word	relaent;
70			Elf32_Word	strsz;
71			Elf32_Word	syment;
72			void		(*init)(void);
73			void		(*fini)(void);
74			const char	*soname;
75			const char	*rpath;
76			Elf32_Word	symbolic;
77			Elf32_Rel	*rel;
78			Elf32_Word	relsz;
79			Elf32_Word	relent;
80			Elf32_Word	pltrel;
81			Elf32_Word	debug;
82			Elf32_Word	textrel;
83			Elf32_Word	jmprel;
84			Elf32_Word	bind_now;
85		} u;
86	} Dyn;
87#define dyn Dyn.u
88
89	struct elf_object *dep_next;	/* Shadow objects for resolve search */
90
91	int		status;
92#define	STAT_RELOC_DONE	1
93#define	STAT_GOT_DONE	2
94#define	STAT_INIT_DONE	4
95
96	Elf32_Phdr	*phdrp;
97	int		phdrc;
98
99	int		refcount;
100	int		obj_type;
101#define	OBJTYPE_LDR	1
102#define	OBJTYPE_EXE	2
103#define	OBJTYPE_LIB	3
104#define	OBJTYPE_DLO	4
105
106	u_int32_t	*buckets;
107	u_int32_t	nbuckets;
108	u_int32_t	*chains;
109	u_int32_t	nchains;
110	Elf32_Dyn	*dynamic;
111
112} elf_object_t;
113
114extern void _dl_rt_resolve(void);
115
116extern elf_object_t *_dl_add_object(const char *objname, Elf32_Dyn *dynp,
117				    const u_int32_t *, const int objtype,
118				    const int laddr, const int loff);
119extern void         _dl_remove_object(elf_object_t *object);
120
121extern elf_object_t *_dl_lookup_object(const char *objname);
122extern elf_object_t *_dl_load_shlib(const char *, elf_object_t *, int);
123extern void         _dl_unload_shlib(elf_object_t *object);
124
125extern int  _dl_md_reloc(elf_object_t *object, int rel, int relsz);
126extern void _dl_md_reloc_got(elf_object_t *object, int lazy);
127
128void * _dl_malloc(const int size);
129
130void _dl_rtld(elf_object_t *object);
131void _dl_call_init(elf_object_t *object);
132
133extern elf_object_t *_dl_objects;
134extern elf_object_t *_dl_last_object;
135
136extern const char *_dl_progname;
137extern struct r_debug *_dl_debug_map;
138
139extern int  _dl_pagesz;
140extern int  _dl_trusted;
141extern int  _dl_errno;
142
143extern char *_dl_libpath;
144extern char *_dl_preload;
145extern char *_dl_bindnow;
146extern char *_dl_traceld;
147extern char *_dl_debug;
148
149#define	DL_NOT_FOUND		1
150#define	DL_CANT_OPEN		2
151#define	DL_NOT_ELF		3
152#define	DL_CANT_OPEN_REF	4
153#define	DL_CANT_MMAP		5
154#define	DL_NO_SYMBOL		6
155#define	DL_INVALID_HANDLE	7
156#define	DL_INVALID_CTL		8
157
158#endif /* _RESOLVE_H_ */
159