diff options
37 files changed, 1108 insertions, 490 deletions
@@ -1,5 +1,72 @@ 2004-10-13 Ulrich Drepper <drepper@redhat.com> + 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> + * elf/dl-close.c (_dl_close): Update bug reporting instructions. 2004-10-11 Ulrich Drepper <drepper@redhat.com> diff --git a/dlfcn/Makefile b/dlfcn/Makefile index 8ac1c20648..4330a8a59d 100644 --- a/dlfcn/Makefile +++ b/dlfcn/Makefile @@ -19,7 +19,8 @@ subdir := dlfcn headers := bits/dlfcn.h dlfcn.h extra-libs := libdl -libdl-routines := dlopen dlclose dlsym dlvsym dlerror dladdr dladdr1 dlinfo +libdl-routines := dlopen dlclose dlsym dlvsym dlerror dladdr dladdr1 dlinfo \ + dlmopen distribute := dlopenold.c glreflib1.c glreflib2.c failtestmod.c \ defaultmod1.c defaultmod2.c errmsg1mod.c modatexit.c \ modcxaatexit.c modstatic.c \ diff --git a/dlfcn/Versions b/dlfcn/Versions index 95ede25e47..6a41c238aa 100644 --- a/dlfcn/Versions +++ b/dlfcn/Versions @@ -8,4 +8,7 @@ libdl { GLIBC_2.3.3 { dladdr1; dlinfo; } + GLIBC_2.3.4 { + dlmopen; + } } diff --git a/dlfcn/dlfcn.h b/dlfcn/dlfcn.h index 9d8ee0d6d1..9383c230dc 100644 --- a/dlfcn/dlfcn.h +++ b/dlfcn/dlfcn.h @@ -1,5 +1,5 @@ /* User functions for run-time dynamic loading. - Copyright (C) 1995-1999,2000,2001,2003 Free Software Foundation, Inc. + Copyright (C) 1995-1999,2000,2001,2003,2004 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 @@ -39,6 +39,14 @@ the run-time address of the symbol called NAME in the global scope is returned. */ # define RTLD_DEFAULT ((void *) 0) + + +/* Type for namespace indeces. */ +typedef long int Lmid_t; + +/* Special namespace ID values. */ +# define LM_ID_BASE 0 /* Initial namespace. */ +# define LM_ID_NEWLM -1 /* For dlmopen: request new namespace. */ #endif @@ -58,6 +66,9 @@ extern void *dlsym (void *__restrict __handle, __const char *__restrict __name) __THROW; #ifdef __USE_GNU +/* Like `dlopen', but request object to be allocated in a new namespace. */ +extern void *dlmopen (Lmid_t __nsid, __const char *__file, int __mode) __THROW; + /* Find the run-time address in the shared object HANDLE refers to of the symbol called NAME with VERSION. */ extern void *dlvsym (void *__restrict __handle, @@ -114,6 +125,9 @@ extern int dlinfo (void *__restrict __handle, /* These are the possible values for the REQUEST argument to `dlinfo'. */ enum { + /* Treat ARG as `lmid_t *'; store namespace ID for HANDLE there. */ + RTLD_DI_LMID = 1, + /* Treat ARG as `struct link_map **'; store the `struct link_map *' for HANDLE there. */ RTLD_DI_LINKMAP = 2, @@ -130,7 +144,6 @@ enum expand $ORIGIN in this shared object's dependency file names. */ RTLD_DI_ORIGIN = 6, - RTLD_DI_LMID = 1, /* Unsupported, defined by Solaris. */ RTLD_DI_CONFIGADDR = 3 /* Unsupported, defined by Solaris. */ }; diff --git a/dlfcn/dlinfo.c b/dlfcn/dlinfo.c index 7e7f1c759b..4e755ad044 100644 --- a/dlfcn/dlinfo.c +++ b/dlfcn/dlinfo.c @@ -55,12 +55,15 @@ RTLD_SELF used in code not dynamically loaded")); switch (args->request) { - case RTLD_DI_LMID: case RTLD_DI_CONFIGADDR: default: GLRO(dl_signal_error) (0, NULL, NULL, N_("unsupported dlinfo request")); break; + case RTLD_DI_LMID: + *(Lmid_t *) args->arg = l->l_ns; + break; + case RTLD_DI_LINKMAP: *(struct link_map **) args->arg = l; break; diff --git a/dlfcn/dlmopen.c b/dlfcn/dlmopen.c new file mode 100644 index 0000000000..fb2a50bb1d --- /dev/null +++ b/dlfcn/dlmopen.c @@ -0,0 +1,69 @@ +/* Load a shared object at run time. + Copyright (C) 1995,96,97,98,99,2000,2003,2004 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 Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <dlfcn.h> +#include <errno.h> +#include <libintl.h> +#include <stddef.h> +#include <ldsodefs.h> + +struct dlmopen_args +{ + /* Namespace ID. */ + Lmid_t nsid; + /* The arguments for dlopen_doit. */ + const char *file; + int mode; + /* The return value of dlopen_doit. */ + void *new; + /* Address of the caller. */ + const void *caller; +}; + +static void +dlmopen_doit (void *a) +{ + struct dlmopen_args *args = (struct dlmopen_args *) a; + + /* Non-shared code has no support for multiple namespaces. */ + if (args->nsid != LM_ID_BASE) +#ifdef SHARED + /* If trying to open the link map for the main executable the namespace + must be the main one. */ + if (args->file == NULL) +#endif + GLRO(dl_signal_error) (EINVAL, NULL, NULL, N_("invalid namespace")); + + args->new = _dl_open (args->file ?: "", args->mode | __RTLD_DLOPEN, + args->caller, args->nsid); +} + + +void * +dlmopen (Lmid_t nsid, const char *file, int mode) +{ + struct dlmopen_args args; + args.nsid = nsid; + args.file = file; + args.mode = mode; + args.caller = RETURN_ADDRESS (0); + + return _dlerror_run (dlmopen_doit, &args) ? NULL : args.new; +} +static_link_warning (dlmopen) diff --git a/dlfcn/dlopen.c b/dlfcn/dlopen.c index 4ebfb0c5b4..cfd7963545 100644 --- a/dlfcn/dlopen.c +++ b/dlfcn/dlopen.c @@ -1,5 +1,5 @@ /* Load a shared object at run time. - Copyright (C) 1995,96,97,98,99,2000,2003 Free Software Foundation, Inc. + Copyright (C) 1995,96,97,98,99,2000,2003,2004 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 @@ -31,13 +31,22 @@ struct dlopen_args const void *caller; }; + +/* Non-shared code has no support for multiple namespaces. */ +#ifdef SHARED +# define NS __LM_ID_CALLER +#else +# define NS LM_ID_BASE +#endif + + static void dlopen_doit (void *a) { struct dlopen_args *args = (struct dlopen_args *) a; args->new = _dl_open (args->file ?: "", args->mode | __RTLD_DLOPEN, - args->caller); + args->caller, args->file == NULL ? LM_ID_BASE : NS); } diff --git a/dlfcn/dlopenold.c b/dlfcn/dlopenold.c index b83d64d91d..f10674aba3 100644 --- a/dlfcn/dlopenold.c +++ b/dlfcn/dlopenold.c @@ -1,5 +1,5 @@ /* Load a shared object at run time. - Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc. + Copyright (C) 1995-1999, 2000, 2004 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 @@ -37,13 +37,21 @@ struct dlopen_args }; +/* Non-shared code has no support for multiple namespaces. */ +#ifdef SHARED +# define NS __LM_ID_CALLER +#else +# define NS LM_ID_BASE +#endif + + static void dlopen_doit (void *a) { struct dlopen_args *args = (struct dlopen_args *) a; args->new = _dl_open (args->file ?: "", args->mode | __RTLD_DLOPEN, - args->caller); + args->caller, args->file == NULL ? LM_ID_BASE : NS); } extern void *__dlopen_nocheck (const char *file, int mode); diff --git a/elf/Makefile b/elf/Makefile index d40d3fd6a7..0bec4abbb7 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -154,7 +154,7 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \ circleload1 tst-tls3 tst-tls4 tst-tls5 tst-tls6 tst-tls7 tst-tls8 \ tst-tls10 tst-tls11 tst-tls12 tst-tls13 tst-tls14 tst-align \ $(tests-execstack-$(have-z-execstack)) tst-dlmodcount \ - tst-dlopenrpath tst-deep1 + tst-dlopenrpath tst-deep1 tst-dlmopen1 tst-dlmopen2 # reldep9 test-srcs = tst-pathopt tests-vis-yes = vismain @@ -187,7 +187,8 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \ reldep8mod1 reldep8mod2 reldep8mod3 \ reldep9mod1 reldep9mod2 reldep9mod3 \ tst-alignmod $(modules-execstack-$(have-z-execstack)) \ - tst-dlopenrpathmod tst-deep1mod1 tst-deep1mod2 tst-deep1mod3 + tst-dlopenrpathmod tst-deep1mod1 tst-deep1mod2 tst-deep1mod3 \ + tst-dlmopen1mod ifeq (yes,$(have-initfini-array)) modules-names += tst-array2dep endif @@ -762,3 +763,10 @@ $(objpfx)tst-deep1: $(libdl) $(objpfx)tst-deep1mod1.so $(objpfx)tst-deep1.out: $(objpfx)tst-deep1mod2.so LDFLAGS-tst-deep1 += -rdynamic tst-deep1mod3.so-no-z-defs = yes + +$(objpfx)tst-dlmopen1mod.so: $(libdl) +$(objpfx)tst-dlmopen1: $(libdl) +$(objpfx)tst-dlmopen1.out: $(objpfx)tst-dlmopen1mod.so + +$(objpfx)tst-dlmopen2: $(libdl) +$(objpfx)tst-dlmopen2.out: $(objpfx)tst-dlmopen1mod.so diff --git a/elf/dl-addr.c b/elf/dl-addr.c index c373eb3b17..c418784b4f 100644 --- a/elf/dl-addr.c +++ b/elf/dl-addr.c @@ -38,26 +38,27 @@ _dl_addr (const void *address, Dl_info *info, /* Find the highest-addressed object that ADDRESS is not below. */ match = NULL; - for (struct link_map *l = GL(dl_loaded); l; l = l->l_next) - if (addr >= l->l_map_start && addr < l->l_map_end) - { - /* We know ADDRESS lies within L if in any shared object. - Make sure it isn't past the end of L's segments. */ - size_t n = l->l_phnum; - if (n > 0) - { - do - --n; - while (l->l_phdr[n].p_type != PT_LOAD); - if (addr >= (l->l_addr + - l->l_phdr[n].p_vaddr + l->l_phdr[n].p_memsz)) - /* Off the end of the highest-addressed shared object. */ - continue; - } - - match = l; - break; - } + for (Lmid_t ns = 0; ns < DL_NNS; ++ns) + for (struct link_map *l = GL(dl_ns)[ns]._ns_loaded; l; l = l->l_next) + if (addr >= l->l_map_start && addr < l->l_map_end) + { + /* We know ADDRESS lies within L if in any shared object. + Make sure it isn't past the end of L's segments. */ + size_t n = l->l_phnum; + if (n > 0) + { + do + --n; + while (l->l_phdr[n].p_type != PT_LOAD); + if (addr >= (l->l_addr + + l->l_phdr[n].p_vaddr + l->l_phdr[n].p_memsz)) + /* Off the end of the highest-addressed shared object. */ + continue; + } + + match = l; + break; + } int result = 0; if (match != NULL) diff --git a/elf/dl-caller.c b/elf/dl-caller.c index ddabbd0f2d..b0c1264d07 100644 --- a/elf/dl-caller.c +++ b/elf/dl-caller.c @@ -35,44 +35,46 @@ _dl_check_caller (const void *caller, enum allowmask mask) #endif static const char expected4[] = LD_SO; - for (struct link_map *l = GL(dl_loaded); l != NULL; l = l->l_next) - if (caller >= (const void *) l->l_map_start - && caller < (const void *) l->l_text_end) - { - /* The address falls into this DSO's address range. Check the - name. */ - if ((mask & allow_libc) && strcmp (expected1, l->l_name) == 0) - return 0; - if ((mask & allow_libdl) && strcmp (expected2, l->l_name) == 0) - return 0; + for (Lmid_t ns = 0; ns < DL_NNS; ++ns) + for (struct link_map *l = GL(dl_ns)[ns]._ns_loaded; l != NULL; + l = l->l_next) + if (caller >= (const void *) l->l_map_start + && caller < (const void *) l->l_text_end) + { + /* The address falls into this DSO's address range. |