1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright 2019 Alex Richardson <arichardson@FreeBSD.org>
5 *
6 * This software was developed by SRI International and the University of
7 * Cambridge Computer Laboratory (Department of Computer Science and
8 * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
9 * DARPA SSITH research programme.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32#ifndef _RTLD_AVOID_LIBC_DEPS_H_
33#define _RTLD_AVOID_LIBC_DEPS_H_
34
35#include <sys/types.h>
36#include <sys/fcntl.h>
37#include <sys/stat.h>
38
39/* Avoid dependencies on libthr (used by closedir/opendir/readdir) */
40#define __isthreaded 0
41#define _pthread_mutex_lock(mtx)	(void)0
42#define _pthread_mutex_unlock(mtx)	(void)0
43#define _pthread_mutex_destroy(mtx)	(void)0
44#define __libc_interposing error, must not use this variable inside rtld
45
46int	__sys_close(int);
47void	__sys_exit(int) __dead2;
48int	__sys_fcntl(int, int, ...);
49int	__sys_fstat(int fd, struct stat *);
50int	__sys_fstatat(int, const char *, struct stat *, int);
51int	__sys___getcwd(char *, size_t);
52int	__sys_open(const char *, int, ...);
53int	__sys_openat(int, const char *, int, ...);
54int	__sys_sigprocmask(int, const sigset_t *, sigset_t *);
55int	__sys_thr_kill(long, int);
56int	__sys_thr_self(long *);
57__ssize_t	__sys_pread(int, void *, __size_t, __off_t);
58__ssize_t	__sys_read(int, void *, __size_t);
59__ssize_t	__sys_write(int, const void *, __size_t);
60
61extern char* __progname;
62const char *_getprogname(void);
63int __getosreldate(void);
64
65
66/*
67 * Don't pull in any of the libc wrappers. Instead we use the system call
68 * directly inside RTLD to avoid pulling in __libc_interposing (which pulls
69 * in lots more object files).
70 */
71#define close(fd)	__sys_close(fd)
72#define _close(fd)	__sys_close(fd)
73#define exit(status)	__sys_exit(status)
74#define _exit(status)	__sys_exit(status)
75#define fcntl(fd, cmd, arg)	__sys_fcntl(fd, cmd, arg)
76#define _fcntl(fd, cmd, arg)	__sys_fcntl(fd, cmd, arg)
77#define _fstat(fd, sb)	__sys_fstat(fd, sb)
78#define open(path, ...)	__sys_open(path, __VA_ARGS__)
79#define pread(fd, buf, nbytes, offset)	__sys_pread(fd, buf, nbytes, offset)
80#define read(fd, buf, nbytes)	__sys_read(fd, buf, nbytes)
81#define sigprocmask(how, set, oset)	__sys_sigprocmask(how, set, oset)
82#define strerror(errno)	rtld_strerror(errno)
83#define _write(fd, buf, nbytes)	__sys_write(fd, buf, nbytes)
84#define write(fd, buf, nbytes)	__sys_write(fd, buf, nbytes)
85
86#endif /* _RTLD_AVOID_LIBC_DEPS_H_ */
87