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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright 2019 Alex Richardson <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.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <assert.h>
#include <signal.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "rtld.h"
#include "rtld_printf.h"
#include "rtld_libc.h"
/*
* Avoid dependencies from various libc calls on abort(). Since this is only
* used for assertions in RTLD, we can just raise SIGABRT directly.
*/
void
abort(void)
{
raise(SIGABRT);
__builtin_trap();
}
static int rtld_errno;
int *__error(void);
int *
__error(void)
{
return (&rtld_errno);
}
/* Avoid dependency on __libc_interposing, use the system call directly. */
#undef sigprocmask
int
sigprocmask(int how, const sigset_t *set, sigset_t *oset)
{
return (__sys_sigprocmask(how, set, oset));
}
__strong_reference(sigprocmask, __libc_sigprocmask);
#if defined DEBUG || !defined(NDEBUG)
/* Provide an implementation of __assert that does not pull in fprintf() */
void
__assert(const char *func, const char *file, int line, const char *failedexpr)
{
if (func == NULL)
(void)rtld_fdprintf(STDERR_FILENO,
"Assertion failed: (%s), file %s, line %d.\n", failedexpr,
file, line);
else
(void)rtld_fdprintf(STDERR_FILENO,
"Assertion failed: (%s), function %s, file %s, line %d.\n",
failedexpr, func, file, line);
abort();
/* NOTREACHED */
}
#endif
/*
* Avoid pulling in all of pthreads from getpagesize().
* It normally uses libc/gen/auxv.c which pulls in pthread_once().
* This relies on init_pagesizes setting page_size so must not be called
* before that.
*/
int
getpagesize(void)
{
return (page_size);
}
int __sys___sysctl(const int *name, u_int namelen, void *oldp,
size_t *oldlenp, const void *newp, size_t newlen);
int
sysctl(const int *name, u_int namelen, void *oldp, size_t *oldlenp,
const void *newp, size_t newlen)
{
int retval;
assert(name[0] != CTL_USER && "Not supported inside rtld!");
retval = __sys___sysctl(name, namelen, oldp, oldlenp, newp, newlen);
return (retval);
}
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