diff options
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | FAQ.in | 20 | ||||
| -rw-r--r-- | elf/dl-close.c | 35 | ||||
| -rw-r--r-- | elf/dl-deps.c | 9 | ||||
| -rw-r--r-- | elf/dl-open.c | 6 |
5 files changed, 32 insertions, 47 deletions
@@ -1,3 +1,12 @@ +1999-01-21 Ulrich Drepper <drepper@cygnus.com> + + * elf/dl-close.c: Rewrite the way adding to the global scope works + to handle error cases better than the last change. + The l_global flag is now only set when the object is actually + counted in the global scope list. + * elf/dl-deps.c: Likewise. + * elf/dl-open.c: Likewise. + 1999-01-20 Philip Blundell <pb@nexus.co.uk> * sysdeps/unix/sysv/linux/arm/sigaction.c: New file. @@ -849,16 +849,16 @@ Another problem is that older binaries that were linked statically against glibc 2.0 will reference the older nss modules (libnss_files.so.1 instead of libnss_files.so.2), so don't remove them. Also, the old glibc-2.0 compiled static libraries (libfoo.a) which happen to depend on the older libio -behavior will be broken by the glibc 2.1 upgrade. The idea is to produce a -libcompat.a that people will be able to use to link in if they want to -compile a static library generated against glibc 2.0 into a program on a -glibc 2.1 system. You should just add -lcompat and you should be fine. - -The glibc-compat add-on will provide the libnss_* files and other stuff so -that it is possible to use static library compiled against glibc 2.0 for -development on a glibc 2.1 based system. Please note that this is currently -just an experiment, although the nss modules part should work. - +behavior will be broken by the glibc 2.1 upgrade. We plan to produce a +compatibility library that people will be able to link in if they want +to compile a static library generated against glibc 2.0 into a program +on a glibc 2.1 system. You just add -lcompat and you should be fine. + +The glibc-compat add-on will provide the libcompat.a library, the older +nss modules, and a few other files. Together, they should make it +possible to do development with old static libraries on a glibc 2.1 +system. This add-on is still in development. You can get it from <URL> +but please keep in mind that it is experimental. ? Source and binary incompatibilities, and what to do about them diff --git a/elf/dl-close.c b/elf/dl-close.c index a56c144..d7a61c4 100644 --- a/elf/dl-close.c +++ b/elf/dl-close.c @@ -106,36 +106,15 @@ _dl_close (struct link_map *map) int cnt = _dl_main_searchlist->r_nlist; do - if (--cnt < 0) - break; + --cnt; while (_dl_main_searchlist->r_list[cnt] != imap); - if (cnt >= 0) - { - /* The object was already correctly registered. */ - while (++cnt < _dl_main_searchlist->r_nlist) - _dl_main_searchlist->r_list[cnt - 1] - = _dl_main_searchlist->r_list[cnt]; - - --_dl_main_searchlist->r_nlist; - } - else - { - /* This can happen if loading was interrupted by something - like a missing symbol in the newly loaded objects. In - this case the object is already marked as global but - `r_nlist' does not count it in. The pointer is in the - `r_list' array so we keep searching in the other - direction. */ - cnt = _dl_main_searchlist->r_nlist; - while (_dl_main_searchlist->r_list[cnt] != imap) - { - ++cnt; - /* Note that if _dl_global_scope_alloc is zero we - should never come here in the first place. */ - assert (cnt < _dl_global_scope_alloc); - } - } + /* The object was already correctly registered. */ + while (++cnt < _dl_main_searchlist->r_nlist) + _dl_main_searchlist->r_list[cnt - 1] + = _dl_main_searchlist->r_list[cnt]; + + --_dl_main_searchlist->r_nlist; } /* We can unmap all the maps at once. We determined the diff --git a/elf/dl-deps.c b/elf/dl-deps.c index 04c4010..355618a 100644 --- a/elf/dl-deps.c +++ b/elf/dl-deps.c @@ -1,5 +1,5 @@ /* Load the dependencies of a mapped object. - Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998, 1999 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 @@ -93,6 +93,7 @@ _dl_map_object_deps (struct link_map *map, struct list known[1 + npreloads + 1]; struct list *runp, *utail, *dtail; unsigned int nlist, nduplist, i; + unsigned int to_add = 0; inline void preload (struct link_map *map) { @@ -416,7 +417,6 @@ _dl_map_object_deps (struct link_map *map, if (global_scope) { unsigned int cnt; - unsigned int to_add = 0; struct link_map **new_global; /* Count the objects we have to put in the global scope. */ @@ -479,16 +479,13 @@ _dl_map_object_deps (struct link_map *map, for (cnt = 0; cnt < nlist; ++cnt) if (map->l_searchlist.r_list[cnt]->l_global == 0) { - map->l_searchlist.r_list[cnt]->l_global = 1; _dl_main_searchlist->r_list[_dl_main_searchlist->r_nlist + to_add] = map->l_searchlist.r_list[cnt]; ++to_add; } /* XXX Do we have to add something to r_dupsearchlist??? --drepper */ - - return to_add; } - return 0; + return to_add; } diff --git a/elf/dl-open.c b/elf/dl-open.c index 3db2b0e..2b3352b 100644 --- a/elf/dl-open.c +++ b/elf/dl-open.c @@ -144,9 +144,9 @@ dl_open_worker (void *a) (*(void (*) (int, char **, char **)) init) (__libc_argc, __libc_argv, __environ); - if (new->l_global) - /* Now we can make the new map available in the global scope. */ - _dl_main_searchlist->r_nlist += global_add; + /* Now we can make the new map available in the global scope. */ + while (global_add-- > 0) + _dl_main_searchlist->r_list[_dl_main_searchlist->r_nlist++]->l_global = 1; if (_dl_sysdep_start == NULL) /* We must be the static _dl_open in libc.a. A static program that |