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Makefile.inc
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libc_private.h
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namespace.h
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rtld_libc.c
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rtld_libc.h
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un-namespace.h
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Editing: rtld_libc.c
/*- * 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. * * $FreeBSD$ */ #include <sys/cdefs.h> #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(). */ int getpagesize(void) { int mib[2], value; size_t size; static int pagesize; if (pagesize != 0) return (pagesize); if (npagesizes > 0) pagesize = pagesizes[0]; if (pagesize == 0) { mib[0] = CTL_HW; mib[1] = HW_PAGESIZE; size = sizeof(value); if (sysctl(mib, nitems(mib), &value, &size, NULL, 0) == -1) pagesize = PAGE_SIZE; else pagesize = value; } return (pagesize); } extern 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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