minix/lib/nbsd_libc/dlfcn/dlfcn_elf.c
Gianluca Guida cc17b27a2b Build NetBSD libc library in world in ELF mode.
3 sets of libraries are built now:
  . ack: all libraries that ack can compile (/usr/lib/i386/)
  . clang+elf: all libraries with minix headers (/usr/lib/)
  . clang+elf: all libraries with netbsd headers (/usr/netbsd/)

Once everything can be compiled with netbsd libraries and headers, the
/usr/netbsd hierarchy will be obsolete and its libraries compiled with
netbsd headers will be installed in /usr/lib, and its headers
in /usr/include. (i.e. minix libc and current minix headers set
will be gone.)

To use the NetBSD libc system (libraries + headers) before
it is the default libc, see:
   http://wiki.minix3.org/en/DevelopersGuide/UsingNetBSDCode
This wiki page also documents the maintenance of the patch
files of minix-specific changes to imported NetBSD code.

Changes in this commit:
  . libsys: Add NBSD compilation and create a safe NBSD-based libc.
  . Port rest of libraries (except libddekit) to new header system.
  . Enable compilation of libddekit with new headers.
  . Enable kernel compilation with new headers.
  . Enable drivers compilation with new headers.
  . Port legacy commands to new headers and libc.
  . Port servers to new headers.
  . Add <sys/sigcontext.h> in compat library.
  . Remove dependency file in tree.
  . Enable compilation of common/lib/libc/atomic in libsys
  . Do not generate RCSID strings in libc.
  . Temporarily disable zoneinfo as they are incompatible with NetBSD format
  . obj-nbsd for .gitignore
  . Procfs: use only integer arithmetic. (Antoine Leca)
  . Increase ramdisk size to create NBSD-based images.
  . Remove INCSYMLINKS handling hack.
  . Add nbsd_include/sys/exec_elf.h
  . Enable ELF compilation with NBSD libc.
  . Add 'make nbsdsrc' in tools to download reference NetBSD sources.
  . Automate minix-port.patch creation.
  . Avoid using fstavfs() as it is *extremely* slow and unneeded.
  . Set err() as PRIVATE to avoid name clash with libc.
  . [NBSD] servers/vm: remove compilation warnings.
  . u32 is not a long in NBSD headers.
  . UPDATING info on netbsd hierarchy
  . commands fixes for netbsd libc
2011-06-24 11:46:30 +02:00

145 lines
3.5 KiB
C

/* $NetBSD: dlfcn_elf.c,v 1.7 2010/10/16 10:27:07 skrll Exp $ */
/*
* Copyright (c) 2000 Takuya SHIOZAKI
* All rights reserved.
*
* 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 ``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 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/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: dlfcn_elf.c,v 1.7 2010/10/16 10:27:07 skrll Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#undef dlopen
#undef dlclose
#undef dlsym
#undef dlerror
#undef dladdr
#undef dfinfo
#define dlopen ___dlopen
#define dlclose ___dlclose
#define dlsym ___dlsym
#define dlerror ___dlerror
#define dladdr ___dladdr
#define dlinfo ___dlinfo
#define dl_iterate_phdr ___dl_iterate_phdr
#define ELFSIZE ARCH_ELFSIZE
#ifdef __minix
#include <sys/null.h>
#include <dlfcn.h>
#else
#include "rtld.h"
#endif
#ifdef __weak_alias
__weak_alias(dlopen,___dlopen)
__weak_alias(dlclose,___dlclose)
__weak_alias(dlsym,___dlsym)
__weak_alias(dlerror,___dlerror)
__weak_alias(dladdr,___dladdr)
__weak_alias(dlinfo,___dlinfo)
__weak_alias(dl_iterate_phdr,___dl_iterate_phdr)
__weak_alias(__dlopen,___dlopen)
__weak_alias(__dlclose,___dlclose)
__weak_alias(__dlsym,___dlsym)
__weak_alias(__dlerror,___dlerror)
__weak_alias(__dladdr,___dladdr)
__weak_alias(__dlinfo,___dlinfo)
__weak_alias(__dl_iterate_phdr,___dl_iterate_phdr)
#endif
/*
* For ELF, the dynamic linker directly resolves references to its
* services to functions inside the dynamic linker itself. These
* weak-symbol stubs are necessary so that "ld" won't complain about
* undefined symbols. The stubs are executed only when the program is
* linked statically, or when a given service isn't implemented in the
* dynamic linker. They must return an error if called, and they must
* be weak symbols so that the dynamic linker can override them.
*/
static char dlfcn_error[] = "Service unavailable";
/*ARGSUSED*/
void *
dlopen(const char *name, int mode)
{
return NULL;
}
/*ARGSUSED*/
int
dlclose(void *fd)
{
return -1;
}
/*ARGSUSED*/
void *
dlsym(void *handle, const char *name)
{
return NULL;
}
/*ARGSUSED*/
__aconst char *
dlerror()
{
return dlfcn_error;
}
/*ARGSUSED*/
int
dladdr(const void *addr, Dl_info *dli)
{
return 0;
}
/*ARGSUSED*/
int
dlinfo(void *handle, int req, void *v)
{
return -1;
}
#ifndef __minix
/*ARGSUSED*/
int
dl_iterate_phdr(int (*callback)(struct dl_phdr_info *, size_t, void *),
void *data)
{
return 0;
}
#endif