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Diffstat (limited to 'dlfcn/dlerror.c')
-rw-r--r--dlfcn/dlerror.c52
1 files changed, 51 insertions, 1 deletions
diff --git a/dlfcn/dlerror.c b/dlfcn/dlerror.c
index 1cde04b080..8789f4f68b 100644
--- a/dlfcn/dlerror.c
+++ b/dlfcn/dlerror.c
@@ -25,6 +25,16 @@
#include <bits/libc-lock.h>
#include <ldsodefs.h>
+#if !defined SHARED && defined IS_IN_libdl
+
+char *
+dlerror (void)
+{
+ return __dlerror ();
+}
+
+#else
+
/* Type for storing results of dynamic loading actions. */
struct dl_action_result
{
@@ -46,11 +56,16 @@ static void free_key_mem (void *mem);
char *
-dlerror (void)
+__dlerror (void)
{
char *buf = NULL;
struct dl_action_result *result;
+# ifdef SHARED
+ if (__builtin_expect (_dlfcn_hook != NULL, 0))
+ return _dlfcn_hook->dlerror ();
+# endif
+
/* If we have not yet initialized the buffer do it now. */
__libc_once (once, init);
@@ -99,6 +114,9 @@ dlerror (void)
return buf;
}
+# ifdef SHARED
+strong_alias (__dlerror, dlerror)
+# endif
int
internal_function
@@ -185,3 +203,35 @@ free_key_mem (void *mem)
free (mem);
__libc_setspecific (key, NULL);
}
+
+# ifdef SHARED
+
+struct dlfcn_hook *_dlfcn_hook __attribute__((nocommon));
+libdl_hidden_data_def (_dlfcn_hook)
+
+# else
+
+static struct dlfcn_hook _dlfcn_hooks =
+ {
+ .dlopen = __dlopen,
+ .dlclose = __dlclose,
+ .dlsym = __dlsym,
+ .dlvsym = __dlvsym,
+ .dlerror = __dlerror,
+ .dladdr = __dladdr,
+ .dladdr1 = __dladdr1,
+ .dlinfo = __dlinfo,
+ .dlmopen = __dlmopen
+ };
+
+void
+__libc_register_dlfcn_hook (struct link_map *map)
+{
+ struct dlfcn_hook **hook;
+
+ hook = (struct dlfcn_hook **) __libc_dlsym_private (map, "_dlfcn_hook");
+ if (hook != NULL)
+ *hook = &_dlfcn_hooks;
+}
+# endif
+#endif