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authorUlrich Drepper <drepper@redhat.com>2004-10-18 23:17:46 +0000
committerUlrich Drepper <drepper@redhat.com>2004-10-18 23:17:46 +0000
commit5f21997b9d6a49ddbed85b044e2be7b182c095a2 (patch)
tree3b63a3a63ebeb466456f52480bd06df198f1dcf5 /dlfcn/dlerror.c
parent790b6c7a7f65dec508a2e71e6d922ec166640afc (diff)
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2004-10-18 Jakub Jelinek <jakub@redhat.com> * elf/dl-libc.c (__libc_dlsym_private, __libc_register_dl_open_hook): New functions. (__libc_dlopen_mode): Call __libc_register_dl_open_hook and __libc_register_dlfcn_hook. * dlfcn/Makefile (routines, elide-routines.os): Set. Add rules to build and test tststatic2. * dlfcn/tststatic2.c: New test. * dlfcn/modstatic2.c: New test module. * dlfcn/dladdr.c: Call _dlfcn_hook from libdl.so if not NULL. Define __ prefixed routine in libc.a and in libdl.a just call it. * dlfcn/dladdr1.c: Likewise. * dlfcn/dlclose.c: Likewise. * dlfcn/dlerror.c: Likewise. * dlfcn/dlinfo.c: Likewise. * dlfcn/dlmopen.c: Likewise. * dlfcn/dlopen.c: Likewise. * dlfcn/dlopenold.c: Likewise. * dlfcn/dlsym.c: Likewise. * dlfcn/dlvsym.c: Likewise. * dlfcn/sdladdr.c: New file. * dlfcn/sdladdr1.c: New file. * dlfcn/sdlclose.c: New file. * dlfcn/sdlerror.c: New file. * dlfcn/sdlinfo.c: New file. * dlfcn/sdlopen.c: New file. * dlfcn/sdlsym.c: New file. * dlfcn/sdlvsym.c: New file. * dlfcn/Versions (libdl): Export _dlfcn_hook@GLIBC_PRIVATE. * include/dlfcn.h (DL_CALLER_DECL, DL_CALLER RETURN_ADDRESS): Define. (struct dlfcn_hook): New type. (_dlfcn_hook): New extern decl. (__dlopen, __dlclose, __dlsym, __dlerror, __dladdr, __dladdr1, __dlinfo, __dlmopen, __libc_dlsym_private, __libc_register_dl_open_hook, __libc_register_dlfcn_hook): New prototypes. (__dlvsym): Use DL_CALLER_DECL. * include/libc-symbols.h: Define libdl_hidden_proto and friends. * malloc/arena.c (_dl_open_hook): Extern decl. (ptmalloc_init): Don't call _dl_addr when dlopened from statically linked programs but don't use brk for them either.
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