From c0f62c56788c48b9fb36dc609c0a9f9db3667306 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Thu, 14 Oct 2004 02:08:23 +0000 Subject: [BZ #77] 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 . * 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 [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 --- elf/dl-iteratephdr.c | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) (limited to 'elf/dl-iteratephdr.c') diff --git a/elf/dl-iteratephdr.c b/elf/dl-iteratephdr.c index d615cd6312..6ed90c73b1 100644 --- a/elf/dl-iteratephdr.c +++ b/elf/dl-iteratephdr.c @@ -42,14 +42,32 @@ __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info, __rtld_lock_lock_recursive (GL(dl_load_lock)); __libc_cleanup_push (cancel_handler, 0); - for (l = GL(dl_loaded); l != NULL; l = l->l_next) + /* We have to determine the namespace of the caller since this determines + which namespace is reported. */ + const void *caller = RETURN_ADDRESS (0); + size_t nloaded = GL(dl_ns)[0]._ns_nloaded; + Lmid_t ns = 0; + for (Lmid_t cnt = DL_NNS - 1; cnt > 0; --cnt) + for (struct link_map *l = GL(dl_ns)[cnt]._ns_loaded; l; l = l->l_next) + { + /* We have to count the total number of loaded objects. */ + nloaded += GL(dl_ns)[cnt]._ns_nloaded; + + if (caller >= (const void *) l->l_map_start + && caller < (const void *) l->l_map_end) + /* There must be exactly one DSO for the range of the virtual + memory. Otherwise something is really broken. */ + ns = cnt; + } + + for (l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next) { info.dlpi_addr = l->l_addr; info.dlpi_name = l->l_name; info.dlpi_phdr = l->l_phdr; info.dlpi_phnum = l->l_phnum; info.dlpi_adds = GL(dl_load_adds); - info.dlpi_subs = GL(dl_load_adds) - GL(dl_nloaded); + info.dlpi_subs = GL(dl_load_adds) - nloaded; ret = callback (&info, sizeof (struct dl_phdr_info), data); if (ret) break; @@ -87,7 +105,7 @@ dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info, info.dlpi_phdr = _dl_phdr; info.dlpi_phnum = _dl_phnum; info.dlpi_adds = GL(dl_load_adds); - info.dlpi_subs = GL(dl_load_adds) - GL(dl_nloaded); + info.dlpi_subs = GL(dl_load_adds) - GL(dl_ns)[LM_ID_BASE]._ns_nloaded; ret = (*callback) (&info, sizeof (struct dl_phdr_info), data); if (ret) return ret; -- cgit v1.2.3