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authorFilippo Arcidiacono <filippo.arcidiacono@st.com>2013-05-09 09:04:20 +0200
committerCarmelo Amoroso <carmelo.amoroso@st.com>2013-05-13 10:11:21 +0200
commit231e4a9b4b972662a6832f714a05525a3754892d (patch)
treed34b4d8d664ed55987fb8741cf282b2fffa87feb
parentf74663a2e6e3395d8f7e83efc28799c85842bed1 (diff)
libdl: fix dlopen implementation from statically linked application
Calling dlopen from statically linked application is actually broken, because _dl_find_hash enters into an infinite loop when trying to resolve symbols. In this case it doesn't need to extend the global scope, it is readyto be used as it is, because _dl_loaded_modules already points to the dlopened library. The patch also fixesi a typo in __LDSO_LD_LIBRARY_PATH__ macro, that was preventing to get the actual value of the LD_LIBRARY_PATH. Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com> Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
-rw-r--r--ldso/libdl/libdl.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/ldso/libdl/libdl.c b/ldso/libdl/libdl.c
index 4630a5942..3a7869603 100644
--- a/ldso/libdl/libdl.c
+++ b/ldso/libdl/libdl.c
@@ -374,7 +374,7 @@ static void *do_dlopen(const char *libname, int flag, ElfW(Addr) from)
if (getenv("LD_BIND_NOW"))
now_flag = RTLD_NOW;
-#if !defined SHARED && defined __LDSO_LIBRARY_PATH__
+#if !defined SHARED && defined __LDSO_LD_LIBRARY_PATH__
/* When statically linked, the _dl_library_path is not yet initialized */
_dl_library_path = getenv("LD_LIBRARY_PATH");
#endif
@@ -541,11 +541,18 @@ static void *do_dlopen(const char *libname, int flag, ElfW(Addr) from)
* to the GOT tables. We need to do this in reverse order so that COPY
* directives work correctly */
- /* Get the tail of the list */
+#ifdef SHARED
+ /*
+ * Get the tail of the list.
+ * In the static case doesn't need to extend the global scope, it is
+ * ready to be used as it is, because _dl_loaded_modules already points
+ * to the dlopened library.
+ */
for (ls = &_dl_loaded_modules->symbol_scope; ls && ls->next; ls = ls->next);
/* Extend the global scope by adding the local scope of the dlopened DSO. */
ls->next = &dyn_chain->dyn->symbol_scope;
+#endif
#ifdef __mips__
/*
* Relocation of the GOT entries for MIPS have to be done