2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright 2003 Alexander Kabaev.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #define RTLI_VERSION_ONE 0x01
34 #define RTLI_VERSION 0x02
36 #define MAX_RTLD_LOCKS 8
39 * This structure is part of the ABI between rtld and threading
40 * libraries, like libthr and even libc_r. Its layout is fixed and
41 * can be changed only by appending new fields at the end, with the
42 * bump of RTLI_VERSION.
47 * Valid if the object calling _rtld_thread_init() exported
48 * symbol _pli_rtli_version. Otherwise assume RTLI_VERSION_ONE.
50 unsigned int rtli_version;
52 void *(*lock_create)(void);
53 void (*lock_destroy)(void *);
54 void (*rlock_acquire)(void *);
55 void (*wlock_acquire)(void *);
56 void (*lock_release)(void *);
57 int (*thread_set_flag)(int);
58 int (*thread_clr_flag)(int);
59 void (*at_fork)(void);
61 /* Version 2 fields */
62 char *(*dlerror_loc)(void);
63 int *(*dlerror_seen)(void);
67 #if defined(IN_RTLD) || defined(PTHREAD_KERNEL)
69 void _rtld_thread_init(struct RtldLockInfo *) __exported;
70 void _rtld_atfork_pre(int *) __exported;
71 void _rtld_atfork_post(int *) __exported;
73 #endif /* IN_RTLD || PTHREAD_KERNEL */
78 typedef struct rtld_lock *rtld_lock_t;
80 extern rtld_lock_t rtld_bind_lock;
81 extern rtld_lock_t rtld_libc_lock;
82 extern rtld_lock_t rtld_phdr_lock;
84 extern struct RtldLockInfo lockinfo;
86 #define RTLD_LOCK_UNLOCKED 0
87 #define RTLD_LOCK_RLOCKED 1
88 #define RTLD_LOCK_WLOCKED 2
90 struct Struct_RtldLockState;
91 typedef struct Struct_RtldLockState RtldLockState;
93 void rlock_acquire(rtld_lock_t, RtldLockState *);
94 void wlock_acquire(rtld_lock_t, RtldLockState *);
95 void lock_release(rtld_lock_t, RtldLockState *);
96 void lock_upgrade(rtld_lock_t, RtldLockState *);
97 void lock_restart_for_upgrade(RtldLockState *);
99 void dlerror_dflt_init(void);