4b999f1962
building defaults to off until clang is updated. current clang does not handle -shared, necessary to change the ld invocation to build shared libraries properly. a new clang should be installed and MKPIC defaults to no unless the newer clang is detected. changes: . mainly small imports of a Makefile or two and small fixes (turning things back on that were turned off in Makefiles) . e.g.: dynamic librefuse now depends on dynamic libpuffs, so libpuffs has to be built dynamically too and a make dependency barrier is needed in lib/Makefile . all library objects now have a PIC (for .so) and non-PIC version, so everything is built twice. . generate PIC versions of the compat (un-RENAMEd) jump files, include function type annotation in generated assembly . build progs with -static by default for now . also build ld.elf_so . also import NetBSD ldd
139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
/* $NetBSD: dlfcn_elf.c,v 1.7 2010/10/16 10:27:07 skrll Exp $ */
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/*
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* Copyright (c) 2000 Takuya SHIOZAKI
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: dlfcn_elf.c,v 1.7 2010/10/16 10:27:07 skrll Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#undef dlopen
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#undef dlclose
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#undef dlsym
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#undef dlerror
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#undef dladdr
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#undef dfinfo
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#define dlopen ___dlopen
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#define dlclose ___dlclose
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#define dlsym ___dlsym
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#define dlerror ___dlerror
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#define dladdr ___dladdr
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#define dlinfo ___dlinfo
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#define dl_iterate_phdr ___dl_iterate_phdr
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#define ELFSIZE ARCH_ELFSIZE
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#include "rtld.h"
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#ifdef __weak_alias
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__weak_alias(dlopen,___dlopen)
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__weak_alias(dlclose,___dlclose)
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__weak_alias(dlsym,___dlsym)
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__weak_alias(dlerror,___dlerror)
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__weak_alias(dladdr,___dladdr)
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__weak_alias(dlinfo,___dlinfo)
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__weak_alias(dl_iterate_phdr,___dl_iterate_phdr)
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__weak_alias(__dlopen,___dlopen)
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__weak_alias(__dlclose,___dlclose)
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__weak_alias(__dlsym,___dlsym)
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__weak_alias(__dlerror,___dlerror)
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__weak_alias(__dladdr,___dladdr)
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__weak_alias(__dlinfo,___dlinfo)
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__weak_alias(__dl_iterate_phdr,___dl_iterate_phdr)
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#endif
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/*
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* For ELF, the dynamic linker directly resolves references to its
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* services to functions inside the dynamic linker itself. These
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* weak-symbol stubs are necessary so that "ld" won't complain about
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* undefined symbols. The stubs are executed only when the program is
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* linked statically, or when a given service isn't implemented in the
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* dynamic linker. They must return an error if called, and they must
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* be weak symbols so that the dynamic linker can override them.
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*/
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static char dlfcn_error[] = "Service unavailable";
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/*ARGSUSED*/
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void *
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dlopen(const char *name, int mode)
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{
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return NULL;
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}
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/*ARGSUSED*/
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int
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dlclose(void *fd)
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{
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return -1;
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}
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/*ARGSUSED*/
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void *
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dlsym(void *handle, const char *name)
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{
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return NULL;
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}
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/*ARGSUSED*/
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__aconst char *
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dlerror()
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{
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return dlfcn_error;
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}
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/*ARGSUSED*/
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int
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dladdr(const void *addr, Dl_info *dli)
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{
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return 0;
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}
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/*ARGSUSED*/
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int
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dlinfo(void *handle, int req, void *v)
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{
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return -1;
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}
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/*ARGSUSED*/
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int
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dl_iterate_phdr(int (*callback)(struct dl_phdr_info *, size_t, void *),
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void *data)
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{
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return 0;
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}
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