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authorUlrich Drepper <drepper@redhat.com>2004-10-14 02:08:23 +0000
committerUlrich Drepper <drepper@redhat.com>2004-10-14 02:08:23 +0000
commitc0f62c56788c48b9fb36dc609c0a9f9db3667306 (patch)
tree79c7e9692bb59dc90e4466e238cd4578c2d5c8f3 /dlfcn
parent8e9185fb1c0294d2eb4bee0797d7e1c2850111ea (diff)
downloadglibc-c0f62c56788c48b9fb36dc609c0a9f9db3667306.tar.gz
[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 <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>
Diffstat (limited to 'dlfcn')
-rw-r--r--dlfcn/Makefile3
-rw-r--r--dlfcn/Versions3
-rw-r--r--dlfcn/dlfcn.h17
-rw-r--r--dlfcn/dlinfo.c5
-rw-r--r--dlfcn/dlmopen.c69
-rw-r--r--dlfcn/dlopen.c13
-rw-r--r--dlfcn/dlopenold.c12
7 files changed, 114 insertions, 8 deletions
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);