[git commit 0.9.32] libdl: search for ELF_RTYPE_CLASS_DLSYM in dlsym()
Bernhard Reutner-Fischer
rep.dot.nop at gmail.com
Wed Jun 29 09:34:38 UTC 2011
commit: http://git.uclibc.org/uClibc/commit/?id=ae9fec983c95a6f0055c4ee477ac7f30e569cf7d
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/0.9.32
On FDPIC platforms, functions are passed by function descriptor, not by
pointers. If you don't specify ELF_RTYPE_CLASS_DLSYM when calling
_dl_find_hash() the return value from dlsym() will be a pointer not a
function descriptor, crashing the program.
The bug was introduced when TLS support was added in
534661b91c98492995274c364c8177c45efc63db
Closes bug#3433
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop at gmail.com>
---
ldso/libdl/libdl.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/ldso/libdl/libdl.c b/ldso/libdl/libdl.c
index 52c77b0..f59889c 100644
--- a/ldso/libdl/libdl.c
+++ b/ldso/libdl/libdl.c
@@ -667,7 +667,7 @@ void *dlsym(void *vhandle, const char *name)
tpnt = NULL;
if (handle == _dl_symbol_tables)
tpnt = handle->dyn; /* Only search RTLD_GLOBAL objs if global object */
- ret = _dl_find_hash(name2, handle, tpnt, 0, &sym_ref);
+ ret = _dl_find_hash(name2, handle, tpnt, ELF_RTYPE_CLASS_DLSYM, &sym_ref);
#if defined(USE_TLS) && USE_TLS && defined SHARED
if (sym_ref.tpnt) {
--
1.7.3.4
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