commit 5407eed84b98056a5af7d95007d8d511ebad60e4
author Pavel Chupin <pavel.v.chupin@intel.com> Mon Dec 09 18:08:48 2013 +0400
committer Elliott Hughes <enh@google.com> Thu Dec 12 11:18:46 2013 -0800
tree 4d3d1319713ade70f6ae29026b06a97b915af7c0
parent 38fcbbb35a40c46e96b4df10d670d1c132910854

Fix debugging issues in vdso handling

Under valgrind ehdr_vdso is null and causing segfault.
Adding debug info for vdso producing plenty of issues on debugging
through gdbserver, removing it. It doesn't seem it should be here.

Unwinding through vdso test still works.

Change-Id: I1a7e233c493f2268d725fa8d7279822d07decc49
Signed-off-by: Pavel Chupin <pavel.v.chupin@intel.com>

linker/linker.cpp

diff --git a/linker/linker.cpp b/linker/linker.cpp
index fe4d6c4..6ebba8e 100755
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -1750,6 +1750,9 @@
 static void add_vdso(KernelArgumentBlock& args UNUSED) {
 #if defined(AT_SYSINFO_EHDR)
     Elf_Ehdr* ehdr_vdso = reinterpret_cast<Elf_Ehdr*>(args.getauxval(AT_SYSINFO_EHDR));
+    if (ehdr_vdso == NULL) {
+        return;
+    }
 
     soinfo* si = soinfo_alloc("[vdso]");
 
@@ -1761,7 +1764,6 @@
     si->load_bias = get_elf_exec_load_bias(ehdr_vdso);
 
     soinfo_link_image(si);
-    insert_soinfo_into_debug_map(si);
 #endif
 }