c0f62c5678
Update. Add support for namespaces in the dynamic linker. * dlfcn/Makefile (libdl-routines): Add dlmopen. * dlfcn/Versions [libdl, GLIBC_2.3.4]: Add dlmopen. * dlfcn/dlfcn.h: Define Lmid_t, LM_ID_BASE, and LM_ID_NEWLM. Declare dlmopen. Document RTLD_DI_LMID. * dlfcn/dlinfo.c: Handle RTLD_DI_LMID. * dlfcn/dlmopen.c: New file. * dlfcn/dlopen.c: Pass new parameter to _dl_open. * dlfcn/dlopenold.c: Likewise. * elf/dl-addr.c: Adjust for removal of GL(dl_loaded). * elf/dl-caller.c: Likewise. * elf/dl-close.c: Likewise. * elf/dl-conflict.c: Likewise. * elf/dl-debug.c: Likewise. * elf/dl-lookup.c: Likewise. * elf/dl-sym.c: Likewise. * elf/dl-version.c: Likewise. * elf/do-lookup.h: Likewise. * elf/rtld.c: Likewise. * sysdeps/unix/sysv/linux/i386/dl-librecon.h: Likewise. * elf/dl-depsc: Likewise. Add new parameter to _dl_map_object. * elf/dl-fini.c: Call destructors in all namespaces. * elf/dl-iteratephdr.c: Compute total nloaded. Adjust for removal of GL(dl_loaded). * elf/dl-libc.c: Pass new parameter to _dl_open. Adjust for removal of GL(dl_loaded). * elf/dl-load.c (_dl_map_object_from_fd): Don't load ld.so a second time. Reuse the one from the main namespace in all others. Pass new parameter to _dl_new_object. Adjust for removal of GL(dl_loaded). * elf/dl-object.c: Take new parameter. Use it to initialize l_ns. Adjust for removal of GL(dl_loaded). * elf/dl-open.c (_dl_open): Take new parameter. Adjust for removal of GL(dl_loaded). * elf/dl-support.c: Replace global _dl_loaded etc variables with _dl_ns variable. * include/dlfcn.h: Adjust prototype of _dl_open. Define __LM_ID_CALLER. * include/link.h: Add l_real, l_ns, and l_direct_opencount elements. * sysdeps/generic/dl-tls.c: Bump TLS_STATIC_SURPLUS. Since libc is using TLS we need memory appropriate to the number of namespaces. * sysdeps/generic/ldsodefs.h (struct rtld_global): Replace _dl_loaded, _dl_nloaded, _dl_global_scope, _dl_main_searchlist, and _dl_global_scope_alloc with _dl_ns element. Define DL_NNS. Adjust prototypes of _dl_map_object and member in rtld_global_ro. * malloc/malloc.c: Include <dlfcn.h>. * malloc/arena.c (ptmalloc_init): If libc is not in primary namespace, never use brk. * elf/Makefile: Add rules to build and run tst-dlmopen1 and tst-dlmopen2. * elf/tst-dlmopen1.c: New file. * elf/tst-dlmopen1mod.c: New file. * elf/tst-dlmopen2.c: New file. * elf/dl-close.c: Improve reference counting by tracking direct loads. * elf/dl-lookup.c (add_dependency): Likewise. * elf/dl-open.c (dl_open_worker): Likewise. * elf/rtld.c (dl_main): Likewise. 2004-09-09 GOTO Masanori <gotom@debian.or.jp> [BZ #77] * elf/dl-close.c: Count down l_opencount to check not only for l_reldeps, but also l_initfini. 2004-10-13 Ulrich Drepper <drepper@redhat.com>
88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/* Check whether caller comes from the right place.
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <assert.h>
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#include <ldsodefs.h>
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#include <stddef.h>
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#include <caller.h>
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#include <gnu/lib-names.h>
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int
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attribute_hidden
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_dl_check_caller (const void *caller, enum allowmask mask)
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{
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static const char expected1[] = LIBC_SO;
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static const char expected2[] = LIBDL_SO;
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#ifdef LIBPTHREAD_SO
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static const char expected3[] = LIBPTHREAD_SO;
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#endif
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static const char expected4[] = LD_SO;
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for (Lmid_t ns = 0; ns < DL_NNS; ++ns)
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for (struct link_map *l = GL(dl_ns)[ns]._ns_loaded; l != NULL;
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l = l->l_next)
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if (caller >= (const void *) l->l_map_start
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&& caller < (const void *) l->l_text_end)
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{
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/* The address falls into this DSO's address range. Check the
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name. */
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if ((mask & allow_libc) && strcmp (expected1, l->l_name) == 0)
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return 0;
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if ((mask & allow_libdl) && strcmp (expected2, l->l_name) == 0)
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return 0;
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#ifdef LIBPTHREAD_SO
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if ((mask & allow_libpthread) && strcmp (expected3, l->l_name) == 0)
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return 0;
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#endif
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if ((mask & allow_ldso) && strcmp (expected4, l->l_name) == 0)
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return 0;
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struct libname_list *runp = l->l_libname;
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while (runp != NULL)
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{
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if ((mask & allow_libc) && strcmp (expected1, runp->name) == 0)
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return 0;
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if ((mask & allow_libdl) && strcmp (expected2, runp->name) == 0)
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return 0;
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#ifdef LIBPTHREAD_SO
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if ((mask & allow_libpthread)
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&& strcmp (expected3, runp->name) == 0)
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return 0;
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#endif
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if ((mask & allow_ldso) && strcmp (expected4, runp->name) == 0)
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return 0;
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runp = runp->next;
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}
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break;
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}
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/* Maybe the dynamic linker is not yet on the list. */
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if ((mask & allow_ldso) != 0
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&& caller >= (const void *) GL(dl_rtld_map).l_map_start
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&& caller < (const void *) GL(dl_rtld_map).l_text_end)
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return 0;
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/* No valid caller. */
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return 1;
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}
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