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* sysdeps/libm-ieee754/e_gamma_r.c: Initialize *signgamp for NaN returns. * sysdeps/libm-ieee754/e_gammaf_r.c: Likewise. * sysdeps/libm-ieee754/e_gammal_r.c: Likewise. Reported by John Reiser <jreiser@BitWagon.com> [PR libc/1185]. * elf/dl-dst.h: Fix typo. * elf/dl-open.c: Likewise. 1999-06-26 Zack Weinberg <zack@rabi.columbia.edu> * elf/dl-libc.c: New file, provides three functions: __libc_dlopen, __libc_dlclose, __libc_dlsym. * include/dlfcn.h: Prototype them. Prototype _dl_addr. * elf/Makefile (routines): Add dl-libc.c. * elf/dl-profstub.c (_dl_mcount_wrapper): Change type of argument to void *. * elf/ldsodefs.h: Change proto and use of _dl_mcount_wrapper to match. * iconv/gconv.c: Include dlfcn.h. * iconv/gconv_db.c: Likewise. * malloc/mtrace.c: Likewise. Don't include ldsodefs.h. * iconv/gconv_int.h (struct __gconv_loaded_object): Change `handle' to a void *. (__gconv_find_func): Delete prototype. * iconv/gconv_dl.c: Don't include ldsodefs.h. Remove dlerror_run and related functions and structs. Use __libc_dlopen, __libc_dlsym, __libc_dlclose. * nss/nsswitch.c: Likewise. 1999-06-28 Ulrich Drepper <drepper@cygnus.com>cvs/glibc-2-2-branch
Ulrich Drepper
27 years ago
17 changed files with 214 additions and 175 deletions
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/* Handle loading and unloading shared objects for internal libc purposes.
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Copyright (C) 1999 Free Software Foundation, Inc. |
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This file is part of the GNU C Library. |
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Contributed by Zack Weinberg <zack@rabi.columbia.edu>, 1999. |
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The GNU C Library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Library General Public License as |
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published by the Free Software Foundation; either version 2 of the |
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License, or (at your option) any later version. |
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The GNU C Library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Library General Public License for more details. |
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|
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You should have received a copy of the GNU Library General Public |
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License along with the GNU C Library; see the file COPYING.LIB. If not, |
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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Boston, MA 02111-1307, USA. */ |
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#include <dlfcn.h> |
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#include <stdlib.h> |
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#include <ldsodefs.h> |
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/* The purpose of this file is to provide wrappers around the dynamic
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linker error mechanism (similar to dlopen() et al in libdl) which |
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are usable from within libc. Generally we want to throw away the |
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string that dlerror() would return and just pass back a null pointer |
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for errors. This also lets the rest of libc not know about the error |
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handling mechanism. |
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Much of this code came from gconv_dl.c with slight modifications. */ |
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static int |
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internal_function |
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dlerror_run (void (*operate) (void *), void *args) |
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{ |
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char *last_errstring = NULL; |
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int result; |
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(void) _dl_catch_error (&last_errstring, operate, args); |
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result = last_errstring != NULL; |
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if (result) |
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free (last_errstring); |
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return result; |
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} |
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/* These functions are called by dlerror_run... */ |
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struct do_dlopen_args |
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{ |
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/* Argument to do_dlopen. */ |
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const char *name; |
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/* Return from do_dlopen. */ |
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struct link_map *map; |
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}; |
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struct do_dlsym_args |
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{ |
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/* Arguments to do_dlsym. */ |
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struct link_map *map; |
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const char *name; |
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/* Return values of do_dlsym. */ |
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ElfW(Addr) loadbase; |
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const ElfW(Sym) *ref; |
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}; |
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static void |
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do_dlopen (void *ptr) |
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{ |
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struct do_dlopen_args *args = (struct do_dlopen_args *) ptr; |
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/* Open and relocate the shared object. */ |
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args->map = _dl_open (args->name, RTLD_LAZY, NULL); |
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} |
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static void |
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do_dlsym (void *ptr) |
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{ |
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struct do_dlsym_args *args = (struct do_dlsym_args *) ptr; |
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args->ref = NULL; |
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args->loadbase = _dl_lookup_symbol (args->name, &args->ref, |
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args->map->l_local_scope, |
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args->map->l_name, 0); |
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} |
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static void |
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do_dlclose (void *ptr) |
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{ |
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_dl_close ((struct link_map *) ptr); |
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} |
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/* ... and these functions call dlerror_run. */ |
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void * |
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__libc_dlopen (const char *__name) |
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{ |
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struct do_dlopen_args args; |
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args.name = __name; |
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return (dlerror_run (do_dlopen, &args) ? NULL : (void *) args.map); |
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} |
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void * |
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__libc_dlsym (void *__map, const char *__name) |
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{ |
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struct do_dlsym_args args; |
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args.map = __map; |
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args.name = __name; |
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return (dlerror_run (do_dlsym, &args) ? NULL |
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: (void *) (args.loadbase + args.ref->st_value)); |
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} |
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int |
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__libc_dlclose (void *__map) |
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{ |
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return dlerror_run (do_dlclose, __map); |
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} |
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