1/*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1993 Paul Kranenburg
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Paul Kranenburg.
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 OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 * $FreeBSD$
33 */
34
35/*
36 * RRS section definitions.
37 *
38 * The layout of some data structures defined in this header file is
39 * such that we can provide compatibility with the SunOS 4.x shared
40 * library scheme.
41 */
42
43#ifndef _SYS_LINK_ELF_H_
44#define	_SYS_LINK_ELF_H_
45
46#include <sys/elf.h>
47
48/*
49 * Flags that describe the origin of the entries in Dl_serinfo.
50 * SunOS has these in <sys/link.h>, we follow the suit.
51 */
52#define	LA_SER_ORIG	0x01	/* original (needed) name */
53#define	LA_SER_LIBPATH	0x02	/* LD_LIBRARY_PATH entry prepended */
54#define	LA_SER_RUNPATH	0x04	/* runpath entry prepended */
55#define	LA_SER_CONFIG	0x08	/* configuration entry prepended */
56#define	LA_SER_DEFAULT	0x40	/* default path prepended */
57#define	LA_SER_SECURE	0x80	/* default (secure) path prepended */
58
59typedef struct link_map {
60	caddr_t		l_base;			/* Base Address of library */
61#ifdef __mips__
62	caddr_t		l_xxx;			/* unused */
63#endif
64	const char	*l_name;		/* Absolute Path to Library */
65	const void	*l_ld;			/* Pointer to .dynamic in memory */
66	struct link_map	*l_next, *l_prev;	/* linked list of of mapped libs */
67	caddr_t		l_addr;			/* Load Offset of library */
68	const char	*l_refname;		/* object we are filtering for */
69} Link_map;
70
71struct r_debug {
72	int		r_version;		/* Currently '1' */
73	struct link_map *r_map;			/* list of loaded images */
74	void		(*r_brk)(struct r_debug *, struct link_map *);
75						/* pointer to break point */
76	enum {
77		RT_CONSISTENT,			/* things are stable */
78		RT_ADD,				/* adding a shared library */
79		RT_DELETE			/* removing a shared library */
80	}		r_state;
81	void		*r_ldbase;		/* Base address of rtld */
82};
83
84#define	R_DEBUG_VERSION		1
85
86struct dl_phdr_info
87{
88	Elf_Addr dlpi_addr;			/* module relocation base */
89	const char *dlpi_name;			/* module name */
90	const Elf_Phdr *dlpi_phdr;		/* pointer to module's phdr */
91	Elf_Half dlpi_phnum;			/* number of entries in phdr */
92	unsigned long long int dlpi_adds;	/* total # of loads */
93	unsigned long long int dlpi_subs;	/* total # of unloads */
94	size_t dlpi_tls_modid;
95	void *dlpi_tls_data;
96};
97
98__BEGIN_DECLS
99
100typedef int (*__dl_iterate_hdr_callback)(struct dl_phdr_info *, size_t, void *);
101extern int dl_iterate_phdr(__dl_iterate_hdr_callback, void *);
102int _rtld_addr_phdr(const void *, struct dl_phdr_info *);
103int _rtld_get_stack_prot(void);
104int _rtld_is_dlopened(void *);
105
106#ifdef __ARM_EABI__
107void * dl_unwind_find_exidx(const void *, int *);
108#endif
109
110__END_DECLS
111
112#endif /* _SYS_LINK_ELF_H_ */
113