FreeBSD/Linux Kernel Cross Reference
sys/sys/link_elf.h
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
59 typedef 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
71 struct 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
86 struct 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
100 typedef int (*__dl_iterate_hdr_callback)(struct dl_phdr_info *, size_t, void *);
101 extern int dl_iterate_phdr(__dl_iterate_hdr_callback, void *);
102 int _rtld_addr_phdr(const void *, struct dl_phdr_info *);
103 int _rtld_get_stack_prot(void);
104 int _rtld_is_dlopened(void *);
105
106 #ifdef __ARM_EABI__
107 void * dl_unwind_find_exidx(const void *, int *);
108 #endif
109
110 __END_DECLS
111
112 #endif /* _SYS_LINK_ELF_H_ */
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