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
33/*
34 * RRS section definitions.
35 *
36 * The layout of some data structures defined in this header file is
37 * such that we can provide compatibility with the SunOS 4.x shared
38 * library scheme.
39 */
40
41#ifndef _SYS_LINK_ELF_H_
42#define _SYS_LINK_ELF_H_
43
44#include <sys/elf.h>
45
46/*
47 * Flags that describe the origin of the entries in Dl_serinfo.
48 * SunOS has these in <sys/link.h>, we follow the suit.
49 */
50#define LA_SER_ORIG 0x01 /* original (needed) name */
51#define LA_SER_LIBPATH 0x02 /* LD_LIBRARY_PATH entry prepended */
52#define LA_SER_RUNPATH 0x04 /* runpath entry prepended */
53#define LA_SER_CONFIG 0x08 /* configuration entry prepended */
54#define LA_SER_DEFAULT 0x40 /* default path prepended */
55#define LA_SER_SECURE 0x80 /* default (secure) path prepended */
56
57typedef struct link_map {
58 caddr_t l_base; /* Base Address of library */
59 const char *l_name; /* Absolute Path to Library */
60 const void *l_ld; /* Pointer to .dynamic in memory */
61 struct link_map *l_next, *l_prev; /* linked list of mapped libs */
62 caddr_t l_addr; /* Load Offset of library */
63 const char *l_refname; /* object we are filtering for */
64} Link_map;
65
66struct r_debug {
67 int r_version; /* Currently '1' */
68 struct link_map *r_map; /* list of loaded images */
69 void (*r_brk)(struct r_debug *, struct link_map *);
70 /* pointer to break point */
71 enum {
72 RT_CONSISTENT, /* things are stable */
73 RT_ADD, /* adding a shared library */
74 RT_DELETE /* removing a shared library */
75 } r_state;
76 void *r_ldbase; /* Base address of rtld */
77};
78
79#define R_DEBUG_VERSION 1
80
81struct dl_phdr_info
82{
83 Elf_Addr dlpi_addr; /* module relocation base */
84 const char *dlpi_name; /* module name */
85 const Elf_Phdr *dlpi_phdr; /* pointer to module's phdr */
86 Elf_Half dlpi_phnum; /* number of entries in phdr */
87 unsigned long long int dlpi_adds; /* total # of loads */
88 unsigned long long int dlpi_subs; /* total # of unloads */
89 size_t dlpi_tls_modid;
90 void *dlpi_tls_data;
91};
92
93__BEGIN_DECLS
94
95typedef int (*__dl_iterate_hdr_callback)(struct dl_phdr_info *, size_t, void *);
96int dl_iterate_phdr(__dl_iterate_hdr_callback, void *);
97int _rtld_addr_phdr(const void *, struct dl_phdr_info *);
98int _rtld_get_stack_prot(void);
99int _rtld_is_dlopened(void *);
100const char *rtld_get_var(const char *name);
101int rtld_set_var(const char *name, const char *val);
102
103#ifdef __ARM_EABI__
104void * dl_unwind_find_exidx(const void *, int *);
105#endif
106
107__END_DECLS
108
109#endif /* _SYS_LINK_ELF_H_ */