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authorRoland McGrath <roland@gnu.org>2003-03-15 23:16:22 +0000
committerRoland McGrath <roland@gnu.org>2003-03-15 23:16:22 +0000
commit45e4762c2c7d04cd51213735c2b440c94cdcf28a (patch)
tree5b2c7f008ae7f0a787bf6798bbb7a8663bc7b0ed /dlfcn/dlinfo.c
parent124dcac84b992d26cfe992f9017f49e92c37add2 (diff)
downloadglibc-45e4762c2c7d04cd51213735c2b440c94cdcf28a.tar.gz
* dlfcn/tst-dlinfo.c: New file.
* dlfcn/Makefile (tests): Add tst-dlinfo. ($(objpfx)tst-dlinfo): New target. * dlfcn/dlinfo.c: New file. * dlfcn/Makefile (libdl-routines): Add it. * dlfcn/Versions (libdl: GLIBC_2.3.3): Add dlinfo. * dlfcn/dlfcn.h [__USE_GNU]: Declare dlinfo. [__USE_GNU] (RTLD_DI_*): New enum constants. [__USE_GNU] (Dl_serpath, Dl_serinfo): New types. * elf/dl-load.c (cache_rpath): New inline function. (_dl_map_object): Use it. (_dl_rtld_di_serinfo): New function. * sysdeps/generic/ldsodefs.h: Declare it. * elf/Versions (ld: GLIBC_PRIVATE): Add it.
Diffstat (limited to 'dlfcn/dlinfo.c')
-rw-r--r--dlfcn/dlinfo.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/dlfcn/dlinfo.c b/dlfcn/dlinfo.c
new file mode 100644
index 0000000000..37177f1f1b
--- /dev/null
+++ b/dlfcn/dlinfo.c
@@ -0,0 +1,87 @@
+/* dlinfo -- Get information from the dynamic linker.
+ Copyright (C) 2003 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 <link.h>
+#include <ldsodefs.h>
+#include <libintl.h>
+
+struct dlinfo_args
+{
+ ElfW(Addr) caller;
+ void *handle;
+ int request;
+ void *arg;
+};
+
+static void
+dlinfo_doit (void *argsblock)
+{
+ struct dlinfo_args *const args = argsblock;
+ struct link_map *l = args->handle;
+
+#if 0
+ if (args->handle == RTLD_SELF)
+ {
+
+ /* Find the highest-addressed object that CALLER is not below. */
+ for (l = GL(dl_loaded); l != NULL; l = l->l_next)
+ if (caller >= l->l_map_start && caller < l->l_map_end)
+ /* There must be exactly one DSO for the range of the virtual
+ memory. Otherwise something is really broken. */
+ break;
+
+ if (l == NULL)
+ _dl_signal_error (0, NULL, NULL, N_("\
+RTLD_SELF used in code not dynamically loaded"));
+ }
+#endif
+
+ switch (args->request)
+ {
+ case RTLD_DI_LMID:
+ case RTLD_DI_CONFIGADDR:
+ default:
+ _dl_signal_error (0, NULL, NULL, N_("unsupported dlinfo request"));
+ break;
+
+ case RTLD_DI_LINKMAP:
+ *(struct link_map **) args->arg = l;
+ break;
+
+ case RTLD_DI_SERINFO:
+ _dl_rtld_di_serinfo (l, args->arg, false);
+ break;
+ case RTLD_DI_SERINFOSIZE:
+ _dl_rtld_di_serinfo (l, args->arg, true);
+ break;
+
+ case RTLD_DI_ORIGIN:
+ strcpy (args->arg, l->l_origin);
+ break;
+ }
+}
+
+int
+dlinfo (void *handle, int request, void *arg)
+{
+ struct dlinfo_args args = { (ElfW(Addr)) RETURN_ADDRESS (0),
+ handle, request, arg };
+ return _dlerror_run (&dlinfo_doit, &args) ? -1 : 0;
+}