vdso should be available in all namespaces
vdso should be available in all namespaces when present. This
bug went undetected because the way libc currently uses vdso (it
does all the lookups itself). This makes it available for the
programs that want to take advantage by dlopening it.
Bug: http://b/73105445
Bug: http://b/79561555
Test: adb shell /data/nativetest/arm/bionic-unit-tests/bionic-unit-tests --gtest_filter=dl.exec_with_ld_config_file
Test: adb shell /data/nativetest/bionic-unit-tests/bionic-unit-tests --gtest_filter=dl*
Change-Id: I8eae0c9848f256190d1c9ec85d10dc6ce383a8bc
(cherry picked from commit 69c68c46ac18a440bf1c0447d8343a6dbad595f1)
diff --git a/linker/linker_main.cpp b/linker/linker_main.cpp
index dc1fa75..00c72d0 100644
--- a/linker/linker_main.cpp
+++ b/linker/linker_main.cpp
@@ -64,6 +64,7 @@
static soinfo* solist;
static soinfo* sonext;
static soinfo* somain; // main process, always the one after libdl_info
+static soinfo* vdso; // vdso if present
void solist_add_soinfo(soinfo* si) {
sonext->next = si;
@@ -104,6 +105,10 @@
return somain;
}
+soinfo* solist_get_vdso() {
+ return vdso;
+}
+
int g_ld_debug_verbosity;
abort_msg_t* g_abort_message = nullptr; // For debuggerd.
@@ -158,6 +163,8 @@
si->set_dt_flags_1(si->get_dt_flags_1() | DF_1_NODELETE);
si->set_linked();
si->call_constructors();
+
+ vdso = si;
}
/* gdb expects the linker to be in the debug shared object list.
@@ -280,6 +287,8 @@
}
}
+ add_vdso(args);
+
struct stat file_stat;
// Stat "/proc/self/exe" instead of executable_path because
// the executable could be unlinked by this point and it should
@@ -366,8 +375,6 @@
}
}
- add_vdso(args);
-
// Load ld_preloads and dependencies.
std::vector<const char*> needed_library_name_list;
size_t ld_preloads_count = 0;