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authorUlrich Drepper <drepper@redhat.com>2005-01-06 22:40:27 +0000
committerUlrich Drepper <drepper@redhat.com>2005-01-06 22:40:27 +0000
commit9dcafc559763e339d4a79580c333127033e39c11 (patch)
tree342441fed429693bc69d95addc588e10a7d021c4 /elf/dl-open.c
parentf14038f2e295e7994e2317127cdea1cb26db6be1 (diff)
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* csu/elf-init.c (__libc_csu_fini): Don't do anything here.
* sysdeps/generic/libc-start.c: Don't register program destructor here. * dlfcn/Makefile: Add rules to build dlfcn.c. (LDFLAGS-dl.so): Removed. * dlfcn/dlclose.c: _dl_close is now in ld.so, use function pointer table. * dlfcn/dlmopen.c: Likewise for _dl_open. * dlfcn/dlopen.c: Likewise. * dlfcn/dlopenold.c: Likewise. * elf/dl-libc.c: Likewise for _dl_open and _dl_close. * elf/Makefile (routines): Remove dl-open and dl-close. (dl-routines): Add dl-open, dl-close, and dl-trampoline. Add rules to build and run tst-audit1. * elf/tst-audit1.c: New file. * elf/tst-auditmod1.c: New file. * elf/Versions [libc]: Remove _dl_open and _dl_close. * elf/dl-close.c: Change for use inside ld.so instead of libc.so. * elf/dl-open.c: Likewise. * elf/dl-debug.c (_dl_debug_initialize): Allow reinitialization, signaled by nonzero parameter. * elf/dl-init.c: Fix use of r_state. * elf/dl-load.c: Likewise. * elf/dl-close.c: Add auditing checkpoints. * elf/dl-open.c: Likewise. * elf/dl-fini.c: Likewise. * elf/dl-load.c: Likewise. * elf/dl-sym.c: Likewise. * sysdeps/generic/libc-start.c: Likewise. * elf/dl-object.c: Allocate memory for auditing information. * elf/dl-reloc.c: Remove RESOLV. We now always need the map. Correctly initialize slotinfo. * elf/dynamic-link.h: Adjust after removal of RESOLV. * sysdeps/hppa/dl-lookupcfg.h: Likewise. * sysdeps/ia64/dl-lookupcfg.h: Likewise. * sysdeps/powerpc/powerpc64/dl-lookupcfg.h: Removed. * elf/dl-runtime.c (_dl_fixup): Little cleanup. (_dl_profile_fixup): New parameters to point to register struct and variable for frame size. Add auditing checkpoints. (_dl_call_pltexit): New function. Don't define trampoline code here. * elf/rtld.c: Recognize LD_AUDIT. Load modules on startup. Remove all the functions from _rtld_global_ro which only _dl_open and _dl_close needed. Add auditing checkpoints. * elf/link.h: Define symbols for auditing interfaces. * include/link.h: Likewise. * include/dlfcn.h: Define __RTLD_AUDIT. Remove prototypes for _dl_open and _dl_close. Adjust access to argc and argv in libdl. * dlfcn/dlfcn.c: New file. * sysdeps/generic/dl-lookupcfg.h: Remove all content now that RESOLVE is gone. * sysdeps/generic/ldsodefs.h: Add definitions for auditing interfaces. * sysdeps/generic/unsecvars.h: Add LD_AUDIT. * sysdeps/i386/dl-machine.h: Remove trampoline code here. Adjust for removal of RESOLVE. * sysdeps/x86_64/dl-machine.h: Likewise. * sysdeps/generic/dl-trampoline.c: New file. * sysdeps/i386/dl-trampoline.c: New file. * sysdeps/x86_64/dl-trampoline.c: New file. * sysdeps/generic/dl-tls.c: Cleanups. Fixup for dtv_t change. Fix updating of DTV. * sysdeps/generic/libc-tls.c: Likewise. * sysdeps/arm/bits/link.h: Renamed to ... * sysdeps/arm/buts/linkmap.h: ...this. * sysdeps/generic/bits/link.h: Renamed to... * sysdeps/generic/bits/linkmap.h: ...this. * sysdeps/hppa/bits/link.h: Renamed to... * sysdeps/hppa/bits/linkmap.h: ...this. * sysdeps/hppa/i386/link.h: Renamed to... * sysdeps/hppa/i386/linkmap.h: ...this. * sysdeps/hppa/ia64/link.h: Renamed to... * sysdeps/hppa/ia64/linkmap.h: ...this. * sysdeps/hppa/s390/link.h: Renamed to... * sysdeps/hppa/s390/linkmap.h: ...this. * sysdeps/hppa/sh/link.h: Renamed to... * sysdeps/hppa/sh/linkmap.h: ...this. * sysdeps/hppa/x86_64/link.h: Renamed to... * sysdeps/hppa/x86_64/linkmap.h: ...this. 2005-01-06 Ulrich Drepper <drepper@redhat.com> * allocatestack.c (init_one_static_tls): Adjust initialization of DTV entry for static tls deallocation fix. * sysdeps/alpha/tls.h (dtv_t): Change pointer type to be struct which also contains information whether the memory pointed to is static TLS or not. * sysdeps/i386/tls.h: Likewise. * sysdeps/ia64/tls.h: Likewise. * sysdeps/powerpc/tls.h: Likewise. * sysdeps/s390/tls.h: Likewise. * sysdeps/sh/tls.h: Likewise. * sysdeps/sparc/tls.h: Likewise. * sysdeps/x86_64/tls.h: Likewise.
Diffstat (limited to 'elf/dl-open.c')
-rw-r--r--elf/dl-open.c236
1 files changed, 109 insertions, 127 deletions
diff --git a/elf/dl-open.c b/elf/dl-open.c
index 7e890ad7f7..9da7523dc1 100644
--- a/elf/dl-open.c
+++ b/elf/dl-open.c
@@ -49,11 +49,6 @@ weak_extern (BP_SYM (_dl_sysdep_start))
extern int __libc_multiple_libcs; /* Defined in init-first.c. */
-extern int __libc_argc attribute_hidden;
-extern char **__libc_argv attribute_hidden;
-
-extern char **__environ;
-
/* Undefine the following for debugging. */
/* #define SCOPE_DEBUG 1 */
#ifdef SCOPE_DEBUG
@@ -74,6 +69,10 @@ struct dl_open_args
struct link_map *map;
/* Namespace ID. */
Lmid_t nsid;
+ /* Original parameters to the program and the current environment. */
+ int argc;
+ char **argv;
+ char **env;
};
@@ -115,8 +114,8 @@ add_to_global (struct link_map *new)
{
GL(dl_ns)[new->l_ns]._ns_global_scope_alloc = 0;
nomem:
- GLRO(dl_signal_error) (ENOMEM, new->l_libname->name, NULL,
- N_("cannot extend global scope"));
+ _dl_signal_error (ENOMEM, new->l_libname->name, NULL,
+ N_("cannot extend global scope"));
return 1;
}
@@ -171,13 +170,16 @@ dl_open_worker (void *a)
int lazy;
unsigned int i;
#ifdef USE_TLS
- bool any_tls;
+ bool any_tls = false;
#endif
struct link_map *call_map = NULL;
+ assert (_dl_debug_initialize (0)->r_state == RT_CONSISTENT);
+
/* Check whether _dl_open() has been called from a valid DSO. */
- if (__check_caller (args->caller_dl_open, allow_libc|allow_libdl) != 0)
- GLRO(dl_signal_error) (0, "dlopen", NULL, N_("invalid caller"));
+ if (__check_caller (args->caller_dl_open,
+ allow_libc|allow_libdl|allow_ldso) != 0)
+ _dl_signal_error (0, "dlopen", NULL, N_("invalid caller"));
/* Determine the caller's map if necessary. This is needed in case
we have a DST, when we don't know the namespace ID we have to put
@@ -226,10 +228,10 @@ dl_open_worker (void *a)
char *new_file;
/* DSTs must not appear in SUID/SGID programs. */
- if (__libc_enable_secure)
+ if (INTUSE(__libc_enable_secure))
/* This is an error. */
- GLRO(dl_signal_error) (0, "dlopen", NULL,
- N_("DST not allowed in SUID/SGID programs"));
+ _dl_signal_error (0, "dlopen", NULL,
+ N_("DST not allowed in SUID/SGID programs"));
/* Determine how much space we need. We have to allocate the
@@ -244,8 +246,8 @@ dl_open_worker (void *a)
/* If the substitution failed don't try to load. */
if (*new_file == '\0')
- GLRO(dl_signal_error) (0, "dlopen", NULL,
- N_("empty dynamic string token substitution"));
+ _dl_signal_error (0, "dlopen", NULL,
+ N_("empty dynamic string token substitution"));
/* Now we have a new file name. */
file = new_file;
@@ -256,8 +258,8 @@ dl_open_worker (void *a)
}
/* Load the named object. */
- args->map = new = GLRO(dl_map_object) (call_map, file, 0, lt_loaded, 0,
- mode | __RTLD_CALLMAP, args->nsid);
+ args->map = new = _dl_map_object (call_map, file, 0, lt_loaded, 0,
+ mode | __RTLD_CALLMAP, args->nsid);
/* If the pointer returned is NULL this means the RTLD_NOLOAD flag is
set and the object is not already loaded. */
@@ -279,8 +281,8 @@ dl_open_worker (void *a)
{
/* Let the user know about the opencount. */
if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_FILES, 0))
- GLRO(dl_debug_printf) ("opening file=%s [%lu]; opencount=%u\n\n",
- new->l_name, new->l_ns, new->l_opencount);
+ _dl_debug_printf ("opening file=%s [%lu]; opencount=%u\n\n",
+ new->l_name, new->l_ns, new->l_opencount);
/* If the user requested the object to be in the global namespace
but it is not so far, add it now. */
@@ -296,23 +298,50 @@ dl_open_worker (void *a)
/* Increment just the reference counter of the object. */
++new->l_opencount;
+ assert (_dl_debug_initialize (0)->r_state == RT_CONSISTENT);
+
return;
}
/* Load that object's dependencies. */
- GLRO(dl_map_object_deps) (new, NULL, 0, 0,
- mode & (__RTLD_DLOPEN | RTLD_DEEPBIND));
+ _dl_map_object_deps (new, NULL, 0, 0,
+ mode & (__RTLD_DLOPEN | RTLD_DEEPBIND));
/* So far, so good. Now check the versions. */
for (i = 0; i < new->l_searchlist.r_nlist; ++i)
if (new->l_searchlist.r_list[i]->l_real->l_versions == NULL)
- (void) GLRO(dl_check_map_versions) (new->l_searchlist.r_list[i]->l_real,
- 0, 0);
+ (void) _dl_check_map_versions (new->l_searchlist.r_list[i]->l_real,
+ 0, 0);
#ifdef SCOPE_DEBUG
show_scope (new);
#endif
+#ifdef SHARED
+ /* Auditing checkpoint: we have added all objects. */
+ if (__builtin_expect (GLRO(dl_naudit) > 0, 0))
+ {
+ struct link_map *head = GL(dl_ns)[new->l_ns]._ns_loaded;
+ /* Do not call the functions for any auditing object. */
+ if (head->l_auditing == 0)
+ {
+ struct audit_ifaces *afct = GLRO(dl_audit);
+ for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
+ {
+ if (afct->activity != NULL)
+ afct->activity (&head->l_audit[cnt].cookie, LA_ACT_CONSISTENT);
+
+ afct = afct->next;
+ }
+ }
+ }
+#endif
+
+ /* Notify the debugger all new objects are now ready to go. */
+ struct r_debug *r = _dl_debug_initialize (0);
+ r->r_state = RT_CONSISTENT;
+ _dl_debug_state ();
+
/* Only do lazy relocation if `LD_BIND_NOW' is not set. */
lazy = (mode & RTLD_BINDING_MASK) == RTLD_LAZY && GLRO(dl_lazy);
@@ -336,12 +365,12 @@ dl_open_worker (void *a)
start the profiling. */
struct link_map *old_profile_map = GL(dl_profile_map);
- GLRO(dl_relocate_object) (l, l->l_scope, 1, 1);
+ _dl_relocate_object (l, l->l_scope, 1, 1);
if (old_profile_map == NULL && GL(dl_profile_map) != NULL)
{
/* We must prepare the profiling. */
- GLRO(dl_start_profile) ();
+ _dl_start_profile ();
/* Prevent unloading the object. */
GL(dl_profile_map)->l_flags_1 |= DF_1_NODELETE;
@@ -349,7 +378,7 @@ dl_open_worker (void *a)
}
else
#endif
- GLRO(dl_relocate_object) (l, l->l_scope, lazy, 0);
+ _dl_relocate_object (l, l->l_scope, lazy, 0);
}
if (l == new)
@@ -357,22 +386,6 @@ dl_open_worker (void *a)
l = l->l_prev;
}
-#ifdef USE_TLS
- /* Do static TLS initialization now if it has been delayed because
- the TLS template might not be fully relocated at _dl_allocate_static_tls
- time. */
- for (l = new; l; l = l->l_next)
- if (l->l_need_tls_init)
- {
- l->l_need_tls_init = 0;
- GL(dl_init_static_tls) (l);
- }
-
- /* We normally don't bump the TLS generation counter. There must be
- actually a need to do this. */
- any_tls = false;
-#endif
-
/* Increment the open count for all dependencies. If the file is
not loaded as a dependency here add the search list of the newly
loaded object to the scope. */
@@ -412,8 +425,8 @@ dl_open_worker (void *a)
newp = (struct r_scope_elem **)
malloc (new_size * sizeof (struct r_scope_elem *));
if (newp == NULL)
- GLRO(dl_signal_error) (ENOMEM, "dlopen", NULL,
- N_("cannot create scope list"));
+ _dl_signal_error (ENOMEM, "dlopen", NULL,
+ N_("cannot create scope list"));
imap->l_scope = memcpy (newp, imap->l_scope,
cnt * sizeof (imap->l_scope[0]));
}
@@ -423,8 +436,8 @@ dl_open_worker (void *a)
realloc (imap->l_scope,
new_size * sizeof (struct r_scope_elem *));
if (newp == NULL)
- GLRO(dl_signal_error) (ENOMEM, "dlopen", NULL,
- N_("cannot create scope list"));
+ _dl_signal_error (ENOMEM, "dlopen", NULL,
+ N_("cannot create scope list"));
imap->l_scope = newp;
}
@@ -441,76 +454,35 @@ dl_open_worker (void *a)
> 0, 0))
{
/* Now that we know the object is loaded successfully add
- modules containing TLS data to the dtv info table. We
+ modules containing TLS data to the slot info table. We
might have to increase its size. */
- struct dtv_slotinfo_list *listp;
- struct dtv_slotinfo_list *prevp;
- size_t idx = new->l_searchlist.r_list[i]->l_tls_modid;
-
- assert (new->l_searchlist.r_list[i]->l_type == lt_loaded);
+ _dl_add_to_slotinfo (new->l_searchlist.r_list[i]);
- /* Find the place in the dtv slotinfo list. */
- listp = GL(dl_tls_dtv_slotinfo_list);
- prevp = NULL; /* Needed to shut up gcc. */
- do
+ if (new->l_searchlist.r_list[i]->l_need_tls_init)
{
- /* Does it fit in the array of this list element? */
- if (idx < listp->len)
- break;
- idx -= listp->len;
- prevp = listp;
- listp = listp->next;
+ new->l_searchlist.r_list[i]->l_need_tls_init = 0;
+# ifdef SHARED
+ /* Update the slot information data for at least the
+ generation of the DSO we are allocating data for. */
+ _dl_update_slotinfo (new->l_searchlist.r_list[i]->l_tls_modid);
+# endif
+
+ GL(dl_init_static_tls) (new->l_searchlist.r_list[i]);
+ assert (new->l_searchlist.r_list[i]->l_need_tls_init == 0);
}
- while (listp != NULL);
-
- if (listp == NULL)
- {
- /* When we come here it means we have to add a new element
- to the slotinfo list. And the new module must be in
- the first slot. */
- assert (idx == 0);
-
- listp = prevp->next = (struct dtv_slotinfo_list *)
- malloc (sizeof (struct dtv_slotinfo_list)
- + TLS_SLOTINFO_SURPLUS * sizeof (struct dtv_slotinfo));
- if (listp == NULL)
- {
- /* We ran out of memory. We will simply fail this
- call but don't undo anything we did so far. The
- application will crash or be terminated anyway very
- soon. */
-
- /* We have to do this since some entries in the dtv
- slotinfo array might already point to this
- generation. */
- ++GL(dl_tls_generation);
-
- GLRO(dl_signal_error) (ENOMEM, "dlopen", NULL, N_("\
-cannot create TLS data structures"));
- }
-
- listp->len = TLS_SLOTINFO_SURPLUS;
- listp->next = NULL;
- memset (listp->slotinfo, '\0',
- TLS_SLOTINFO_SURPLUS * sizeof (struct dtv_slotinfo));
- }
-
- /* Add the information into the slotinfo data structure. */
- listp->slotinfo[idx].map = new->l_searchlist.r_list[i];
- listp->slotinfo[idx].gen = GL(dl_tls_generation) + 1;
/* We have to bump the generation counter. */
any_tls = true;
}
/* Bump the generation number if necessary. */
- if (any_tls)
- if (__builtin_expect (++GL(dl_tls_generation) == 0, 0))
- __libc_fatal (_("TLS generation counter wrapped! Please report this."));
+ if (any_tls && __builtin_expect (++GL(dl_tls_generation) == 0, 0))
+ _dl_fatal_printf (N_("\
+TLS generation counter wrapped! Please report this."));
#endif
/* Run the initializer functions of new objects. */
- GLRO(dl_init) (new, __libc_argc, __libc_argv, __environ);
+ _dl_init (new, args->argc, args->argv, args->env);
/* Now we can make the new map available in the global scope. */
if (mode & RTLD_GLOBAL)
@@ -532,14 +504,14 @@ cannot create TLS data structures"));
/* Let the user know about the opencount. */
if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_FILES, 0))
- GLRO(dl_debug_printf) ("opening file=%s [%lu]; opencount=%u\n\n",
- new->l_name, new->l_ns, new->l_opencount);
+ _dl_debug_printf ("opening file=%s [%lu]; opencount=%u\n\n",
+ new->l_name, new->l_ns, new->l_opencount);
}
void *
-internal_function
-_dl_open (const char *file, int mode, const void *caller_dlopen, Lmid_t nsid)
+_dl_open (const char *file, int mode, const void *caller_dlopen, Lmid_t nsid,
+ int argc, char *argv[], char *env[])
{
struct dl_open_args args;
const char *objname;
@@ -548,12 +520,13 @@ _dl_open (const char *file, int mode, const void *caller_dlopen, Lmid_t nsid)
if ((mode & RTLD_BINDING_MASK) == 0)
/* One of the flags must be set. */
- GLRO(dl_signal_error) (EINVAL, file, NULL,
- N_("invalid mode for dlopen()"));
+ _dl_signal_error (EINVAL, file, NULL, N_("invalid mode for dlopen()"));
/* Make sure we are alone. */
__rtld_lock_lock_recursive (GL(dl_load_lock));
+ assert (_dl_debug_initialize (0)->r_state == RT_CONSISTENT);
+
if (nsid == LM_ID_NEWLM)
{
/* Find a new namespace. */
@@ -566,16 +539,18 @@ _dl_open (const char *file, int mode, const void *caller_dlopen, Lmid_t nsid)
/* No more namespace available. */
__rtld_lock_unlock_recursive (GL(dl_load_lock));
- GLRO(dl_signal_error) (EINVAL, file, NULL, N_("\
+ _dl_signal_error (EINVAL, file, NULL, N_("\
no more namespaces available for dlmopen()"));
}
}
/* Never allow loading a DSO in a namespace which is empty. Such
- direct placements is only causing problems. */
+ direct placements is only causing problems. Also don't allow
+ loading into a namespace used for auditing. */
else if (nsid != LM_ID_BASE && nsid != __LM_ID_CALLER
- && GL(dl_ns)[nsid]._ns_nloaded == 0)
- GLRO(dl_signal_error) (EINVAL, file, NULL,
- N_("invalid target namespace in dlmopen()"));
+ && (GL(dl_ns)[nsid]._ns_nloaded == 0
+ || GL(dl_ns)[nsid]._ns_loaded->l_auditing))
+ _dl_signal_error (EINVAL, file, NULL,
+ N_("invalid target namespace in dlmopen()"));
args.file = file;
args.mode = mode;
@@ -583,11 +558,14 @@ no more namespaces available for dlmopen()"));
args.caller_dl_open = RETURN_ADDRESS (0);
args.map = NULL;
args.nsid = nsid;
- errcode = GLRO(dl_catch_error) (&objname, &errstring, dl_open_worker, &args);
+ args.argc = argc;
+ args.argv = argv;
+ args.env = env;
+ errcode = _dl_catch_error (&objname, &errstring, dl_open_worker, &args);
#ifndef MAP_COPY
/* We must munmap() the cache file. */
- GLRO(dl_unload_cache) ();
+ _dl_unload_cache ();
#endif
/* Release the lock. */
@@ -603,21 +581,22 @@ no more namespaces available for dlmopen()"));
state if relocation failed, for example. */
if (args.map)
{
- unsigned int i;
-
/* Increment open counters for all objects since this
sometimes has not happened yet. */
if (args.map->l_searchlist.r_list[0]->l_opencount == 0)
- for (i = 0; i < args.map->l_searchlist.r_nlist; ++i)
+ for (unsigned int i = 0; i < args.map->l_searchlist.r_nlist; ++i)
++args.map->l_searchlist.r_list[i]->l_opencount;
#ifdef USE_TLS
- /* Maybe some of the modules which were loaded uses TLS.
+ /* Maybe some of the modules which were loaded use TLS.
Since it will be removed in the following _dl_close call
- we have to mark the dtv array as having gaps to fill
- the holes. This is a pessimistic assumption which won't
- hurt if not true. */
- GL(dl_tls_dtv_gaps) = true;
+ we have to mark the dtv array as having gaps to fill the
+ holes. This is a pessimistic assumption which won't hurt
+ if not true. There is no need to do this when we are
+ loading the auditing DSOs since TLS has not yet been set
+ up. */
+ if ((mode & __RTLD_AUDIT) == 0)
+ GL(dl_tls_dtv_gaps) = true;
#endif
_dl_close (args.map);
@@ -639,20 +618,23 @@ no more namespaces available for dlmopen()"));
memcpy (local_errstring, errstring, len_errstring);
}
- if (errstring != _dl_out_of_memory)
+ if (errstring != INTUSE(_dl_out_of_memory))
free ((char *) errstring);
+ assert (_dl_debug_initialize (0)->r_state == RT_CONSISTENT);
+
/* Reraise the error. */
- GLRO(dl_signal_error) (errcode, objname, NULL, local_errstring);
+ _dl_signal_error (errcode, objname, NULL, local_errstring);
}
+ assert (_dl_debug_initialize (0)->r_state == RT_CONSISTENT);
+
#ifndef SHARED
DL_STATIC_INIT (args.map);
#endif
return args.map;
}
-libc_hidden_def (_dl_open)
#ifdef SCOPE_DEBUG