2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright 2019 Alex Richardson <arichardson@FreeBSD.org>
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.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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
34 #include <sys/cdefs.h>
35 #include <sys/param.h>
36 #include <sys/types.h>
37 #include <sys/sysctl.h>
46 #include "rtld_printf.h"
47 #include "rtld_libc.h"
50 * Avoid dependencies from various libc calls on abort(). Since this is only
51 * used for assertions in RTLD, we can just raise SIGABRT directly.
60 static int rtld_errno;
69 /* Avoid dependency on __libc_interposing, use the system call directly. */
72 sigprocmask(int how, const sigset_t *set, sigset_t *oset)
75 return (__sys_sigprocmask(how, set, oset));
77 __strong_reference(sigprocmask, __libc_sigprocmask);
79 #if defined DEBUG || !defined(NDEBUG)
80 /* Provide an implementation of __assert that does not pull in fprintf() */
82 __assert(const char *func, const char *file, int line, const char *failedexpr)
86 (void)rtld_fdprintf(STDERR_FILENO,
87 "Assertion failed: (%s), file %s, line %d.\n", failedexpr,
90 (void)rtld_fdprintf(STDERR_FILENO,
91 "Assertion failed: (%s), function %s, file %s, line %d.\n",
92 failedexpr, func, file, line);
99 * Avoid pulling in all of pthreads from getpagesize().
100 * It normally uses libc/gen/auxv.c which pulls in pthread_once().
113 pagesize = pagesizes[0];
117 mib[1] = HW_PAGESIZE;
118 size = sizeof(value);
119 if (sysctl(mib, nitems(mib), &value, &size, NULL, 0) == -1)
120 pagesize = PAGE_SIZE;
128 extern int __sys___sysctl(const int *name, u_int namelen, void *oldp,
129 size_t *oldlenp, const void *newp, size_t newlen);
132 sysctl(const int *name, u_int namelen, void *oldp, size_t *oldlenp,
133 const void *newp, size_t newlen)
137 assert(name[0] != CTL_USER && "Not supported inside rtld!");
138 retval = __sys___sysctl(name, namelen, oldp, oldlenp, newp, newlen);