csu: Update __libgcc_s_init comment

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit 08c6e95234c60a5c2f37532d1111acf084f39345)

2 files changed, 11 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index a1028fcdff..6178a89fa6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2018-01-11  Florian Weimer  <fweimer@redhat.com>
+
+	* sysdeps/gnu/unwind-resume.c (__libgcc_s_init): Update comment
+	and error message.
+
 2018-01-16  Florian Weimer  <fweimer@redhat.com>
 
 	* nptl/Makefile (CFLAGS-tst-minstack-throw.o): Compile in C++11
diff --git a/sysdeps/gnu/unwind-resume.c b/sysdeps/gnu/unwind-resume.c
index 1ea833ba9b..ecb4ce2067 100644
--- a/sysdeps/gnu/unwind-resume.c
+++ b/sysdeps/gnu/unwind-resume.c
@@ -35,13 +35,17 @@ __libgcc_s_init (void)
   void *resume, *personality;
   void *handle;
 
-  handle = __libc_dlopen (LIBGCC_S_SO);
+  /* Use RTLD_NOW here for consistency with pthread_cancel_init.
+     RTLD_NOW will rarely make a difference here because unwinding is
+     already in progress, so libgcc_s.so has already been loaded if
+     its unwinder is used.  */
+  handle = __libc_dlopen_mode (LIBGCC_S_SO, RTLD_NOW | __RTLD_DLOPEN);
 
   if (handle == NULL
       || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL
       || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL)
     __libc_fatal (LIBGCC_S_SO
-                  " must be installed for pthread_cancel to work\n");
+                  " must be installed for unwinding to work\n");
 
 #ifdef PTR_MANGLE
   PTR_MANGLE (resume);