PowerPC: fix backtrace to handle signal trampolines

This patch fixes backtrace for PPC32 and PPC64 to correctly handle
signal trampolines. The 'debug/tst-backtrace6.c' also check for
SA_SIGINFO handling, where is triggers another vDSO symbols for PPC32.

1 files changed, 8 insertions, 3 deletions

diff --git a/debug/tst-backtrace5.c b/debug/tst-backtrace5.c
index ca47437..51180c1 100644
--- a/debug/tst-backtrace5.c
+++ b/debug/tst-backtrace5.c
@@ -28,6 +28,10 @@
 
 #include "tst-backtrace.h"
 
+#ifndef SIGACTION_FLAGS
+# define SIGACTION_FLAGS 0
+#endif
+
 static int do_test (void);
 #define TEST_FUNCTION do_test ()
 #include "../test-skeleton.c"
@@ -91,7 +95,7 @@ handle_signal (int signum)
 }
 
 NO_INLINE int
-fn (int c)
+fn (int c, int flags)
 {
   pid_t parent_pid, child_pid;
   int pipefd[2];
@@ -100,12 +104,13 @@ fn (int c)
 
   if (c > 0)
     {
-      fn (c - 1);
+      fn (c - 1, flags);
       return x;
     }
 
   memset (&act, 0, sizeof (act));
   act.sa_handler = handle_signal;
+  act.sa_flags = flags;
   sigemptyset (&act.sa_mask);
   sigaction (SIGUSR1, &act, NULL);
   parent_pid = getpid ();
@@ -131,6 +136,6 @@ fn (int c)
 NO_INLINE static int
 do_test (void)
 {
-  fn (2);
+  fn (2, SIGACTION_FLAGS);
   return ret;
 }