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 * $FreeBSD$
33 */
34#ifndef _RTLD_AVOID_LIBC_DEPS_H_
35#define _RTLD_AVOID_LIBC_DEPS_H_
36
37#include <sys/cdefs.h>
38#include <sys/types.h>
39#include <sys/fcntl.h>
40#include <sys/stat.h>
41
42/* Avoid dependencies on libthr (used by closedir/opendir/readdir) */
43#define __isthreaded 0
44#define _pthread_mutex_lock(mtx)	(void)0
45#define _pthread_mutex_unlock(mtx)	(void)0
46#define _pthread_mutex_destroy(mtx)	(void)0
47#define __libc_interposing error, must not use this variable inside rtld
48
49int	__sys_close(int);
50void	__sys_exit(int) __dead2;
51int	__sys_fcntl(int, int, ...);
52int	__sys_fstat(int fd, struct stat *);
53int	__sys_fstatat(int, const char *, struct stat *, int);
54int	__sys___getcwd(char *, size_t);
55int	__sys_open(const char *, int, ...);
56int	__sys_openat(int, const char *, int, ...);
57int	__sys_sigprocmask(int, const sigset_t *, sigset_t *);
58int	__sys_thr_kill(long, int);
59int	__sys_thr_self(long *);
60__ssize_t	__sys_pread(int, void *, __size_t, __off_t);
61__ssize_t	__sys_read(int, void *, __size_t);
62__ssize_t	__sys_write(int, const void *, __size_t);
63
64extern char* __progname;
65const char *_getprogname(void);
66int __getosreldate(void);
67
68
69/*
70 * Don't pull in any of the libc wrappers. Instead we use the system call
71 * directly inside RTLD to avoid pulling in __libc_interposing (which pulls
72 * in lots more object files).
73 */
74#define close(fd)	__sys_close(fd)
75#define _close(fd)	__sys_close(fd)
76#define exit(status)	__sys_exit(status)
77#define _exit(status)	__sys_exit(status)
78#define fcntl(fd, cmd, arg)	__sys_fcntl(fd, cmd, arg)
79#define _fcntl(fd, cmd, arg)	__sys_fcntl(fd, cmd, arg)
80#define _fstat(fd, sb)	__sys_fstat(fd, sb)
81#define open(path, ...)	__sys_open(path, __VA_ARGS__)
82#define pread(fd, buf, nbytes, offset)	__sys_pread(fd, buf, nbytes, offset)
83#define read(fd, buf, nbytes)	__sys_read(fd, buf, nbytes)
84#define sigprocmask(how, set, oset)	__sys_sigprocmask(how, set, oset)
85#define strerror(errno)	rtld_strerror(errno)
86#define _write(fd, buf, nbytes)	__sys_write(fd, buf, nbytes)
87#define write(fd, buf, nbytes)	__sys_write(fd, buf, nbytes)
88
89#endif /* _RTLD_AVOID_LIBC_DEPS_H_ */
90