From 86d2c878acad4d2f16d0af6fe6a030b90815362d Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Tue, 7 Nov 1995 21:46:52 +0000 Subject: Tue Nov 7 12:29:46 1995 Roland McGrath * elf/linux-compat.c: New file. * elf/Makefile (distribute): Add linux-compat.c. (generated): Add librtld.so. [$(config-os)=linux*] (extra-objs): Add linux-compat.so. [$(config-os)=linux*] (extra-objs): Add ld-linux.so.1. (librtld.so): New target. (ld.so, ld-linux.so.1): Make from librtld.so. * elf/rtld.c (dl_main): Instead of weak call to _dl_compat_init, call our own DT_INIT if we have one (and then clear it). (__dgettext): New weak function. * intl/localealias.c (read_alias_file): Avoid sprintf; use memcpy by hand instead. * sysdeps/generic/_strerror.c (_strerror_internal): Use _itoa instead of snprintf. * sysdeps/mach/_strerror.c (_strerror_internal): Don't write BUF[BUFLEN]. * elf/rtld.c (rtld_map): New static variable. (_dl_start): Use a differently named local BOOTSTRAP_MAP for the bootstrapping. Then copy data into `rtld_map'. (dl_main): Finish filling in rtld_map and link it into the chain, instead of allocating a new structure. (dl_main): Call _dl_compat_init if it is defined (use weak ref). * elf/dlsym.c: Fix last change: move REF out of `doit'. control. using it. and cwdir ports. functions. these. $(libdir)(rtld-installed-name). leading zeroes. in the rhs. pattern rule. never know. (fork): Use symbol_set_* macros for _hurd_fork_locks. * sysdeps/unix/sysv/sysv4/linux/i386/sysdep.S (__syscall_error): instead of unix/sysv. -dynamic-linker. (__printf_fp): Last arg ARGS is now `const void **const'; locale/C-ctype.c. * sysdeps/mach/hurd/sigsuspend.c: Likewise. * sysdeps/mach/hurd/mips/sigreturn.c: Likewise. alias gethostname. setitmr setpgrp (_S_msg_get_exec_flags, _S_msg_set_exec_flags, (abort_thread, abort_rpcs): Take same new arg and pass it through. --- elf/linux-compat.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 elf/linux-compat.c (limited to 'elf/linux-compat.c') diff --git a/elf/linux-compat.c b/elf/linux-compat.c new file mode 100644 index 0000000..ed1595e --- /dev/null +++ b/elf/linux-compat.c @@ -0,0 +1,40 @@ +/* Initializer for Linux-compatible dynamic linker `/lib/ld-linux.so.1'. +Copyright (C) 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include + +/* This function will be the DT_INIT initializer for the ld-linux.so.1 + shared object. This is called from rtld.c before shlib initializers. + + The old Linux ELF startup code expects the dynamic linker to magically + call atexit to arrange for shared object finalizers to run. (The + ABI-compliant startup code does this itself.) We build a compatible + version of the dynamic linker to install as /lib/ld-linux.so.1, the + name old Linux ELF binaries use. */ + +void +_init (void) +{ + const Elf32_Sym *ref = NULL; + Elf32_Addr loadbase = _dl_lookup_symbol ("atexit", &ref, _dl_loaded, + "", + 1); + (*(__typeof (atexit) *) (loadbase + ref->st_value)) (&_dl_fini); +} -- cgit v1.1