[PATCH] tests: backtrace.c accept __libc_do_syscall as first frame symname.

[Mark Wielaard <mjw@redhat.com>]

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On some architectures (Debian armhl) system calls go through
__libc_do_syscall instead of __kernel_vsyscall. Accept either of
these symbol names for the first backtrace frame.

Signed-off-by: Mark Wielaard <mjw@redhat.com>
---
 tests/ChangeLog   |    5 +++++
 tests/backtrace.c |    3 ++-
 2 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/tests/ChangeLog b/tests/ChangeLog
index 7c46428..90a2a0e 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,5 +1,10 @@
 2014-06-13  Mark Wielaard  <mjw@redhat.com>
 
+	* backtrace.c (callback_verify): Accept "__libc_do_syscall" as first
+	frame symname.
+
+2014-06-13  Mark Wielaard  <mjw@redhat.com>
+
 	* backtrace-subr.sh (check_native_unsupported): New function.
 	(check_native): Call it.
 	(check_native_core): Likewise.
diff --git a/tests/backtrace.c b/tests/backtrace.c
index ce0bd17..1d3948e 100644
--- a/tests/backtrace.c
+++ b/tests/backtrace.c
@@ -98,7 +98,8 @@ callback_verify (pid_t tid, unsigned frameno, Dwarf_Addr pc,
   {
     case 0:
       if (! reduce_frameno && symname
-	       && strcmp (symname, "__kernel_vsyscall") == 0)
+	       && (strcmp (symname, "__kernel_vsyscall") == 0
+		   || strcmp (symname, "__libc_do_syscall") == 0))
 	reduce_frameno = true;
       else
 	assert (symname && strcmp (symname, "raise") == 0);
-- 
1.7.1