From 7329ea51b4d9e9953c06b199b9e78d1f8f1cf3fe Mon Sep 17 00:00:00 2001 From: Alexey Neyman Date: Fri, 10 Mar 2017 15:43:18 -0800 Subject: Patch from upstream fixing dlopen from a static app Signed-off-by: Alexey Neyman diff --git a/patches/uClibc/0.9.33.2/998-dlopen-static.patch b/patches/uClibc/0.9.33.2/998-dlopen-static.patch new file mode 100644 index 0000000..9d2fa55 --- /dev/null +++ b/patches/uClibc/0.9.33.2/998-dlopen-static.patch @@ -0,0 +1,56 @@ +From 231e4a9b4b972662a6832f714a05525a3754892d Mon Sep 17 00:00:00 2001 +From: Filippo Arcidiacono +Date: Thu, 9 May 2013 09:04:20 +0200 +Subject: 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 +Signed-off-by: Carmelo Amoroso +--- + ldso/libdl/libdl.c | 11 +++++++++-- + 1 file changed, 9 insertions(+), 2 deletions(-) + +diff --git a/ldso/libdl/libdl.c b/ldso/libdl/libdl.c +index 4630a59..3a78696 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 +-- +cgit v0.12 + -- cgit v0.10.2-6-g49f6