Differential D20663 Diff 59047 libexec/rtld-elf/rtld-libc/rtld_libc.h

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libexec/rtld-elf/rtld-libc/rtld_libc.h

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				/*-
				* SPDX-License-Identifier: BSD-2-Clause
				*
				* Copyright 2019 Alex Richadson <arichardson@FreeBSD.org>
				*
				* This software was developed by SRI International and the University of
				* Cambridge Computer Laboratory (Department of Computer Science and
				* Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
				* DARPA SSITH research programme.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
				* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
				* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
				* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
				* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
				* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*/
				#ifndef _RTLD_AVOID_LIBC_DEPS_H_
				#define _RTLD_AVOID_LIBC_DEPS_H_

				#include <sys/cdefs.h>
				#include <sys/types.h>
				#include <sys/fcntl.h>
				#include <sys/stat.h>

				/* Avoid dependencies on libthr (used by closedir/opendir/readdir) */
				#define __isthreaded 0
				#define _pthread_mutex_lock(mtx) (void)0
				#define _pthread_mutex_unlock(mtx) (void)0
				#define _pthread_mutex_destroy(mtx) (void)0

				int __sys_close(int);
				void __sys_exit(int) __dead2;
				int __sys_fcntl(int, int, ...);
				int __sys_fstat(int fd, struct stat *);
				int __sys_fstatat(int, const char , struct stat , int);
				int __sys___getcwd(char *, size_t);
				int __sys_open(const char *, int, ...);
				int __sys_openat(int, const char *, int, ...);
				int __sys_sigprocmask(int, const sigset_t , sigset_t );
				int __sys_thr_kill(long, int);
				int __sys_thr_self(long *);
				__ssize_t __sys_pread(int, void *, __size_t, __off_t);
				__ssize_t __sys_read(int, void *, __size_t);
				__ssize_t __sys_write(int, const void *, __size_t);

				extern char* __progname;
				const char *_getprogname(void);
				int __getosreldate(void);


				/*
				* Don't pull in any of the libc wrappers. Instead we use the system call
				* directly inside RTLD to avoid pulling in __libc_interposing (which pulls
				* in lots more object files).
				*/
				#define close(fd) __sys_close(fd)
				#define _close(fd) __sys_close(fd)
				#define exit(status) __sys_exit(status)
				#define _exit(status) __sys_exit(status)
				#define fcntl(fd, cmd, arg) __sys_fcntl(fd, cmd, arg)
				#define _fcntl(fd, cmd, arg) __sys_fcntl(fd, cmd, arg)
				#define _fstat(fd, sb) __sys_fstat(fd, sb)
				#define open(path, ...) __sys_open(path, __VA_ARGS__)
				#define pread(fd, buf, nbytes, offset) __sys_pread(fd, buf, nbytes, offset)
				#define read(fd, buf, nbytes) __sys_read(fd, buf, nbytes)
				#define sigprocmask(how, set, oset) __sys_sigprocmask(how, set, oset)
				#define strerror(errno) rtld_strerror(errno)
				#define _write(fd, buf, nbytes) __sys_write(fd, buf, nbytes)
				#define write(fd, buf, nbytes) __sys_write(fd, buf, nbytes)

				#endif /* _RTLD_AVOID_LIBC_DEPS_H_ */