From f1743f00e6058d2dee44510f3ef165c549a6291e Mon Sep 17 00:00:00 2001
From: "Frank Ch. Eigler" <fche@elastic.org>
Date: Sat, 12 Jul 2008 19:10:22 -0400
Subject: PR6738: restore support for rhel4-era (2.6.9) kernels

---
 runtime/unwind/x86_64.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'runtime/unwind/x86_64.h')

diff --git a/runtime/unwind/x86_64.h b/runtime/unwind/x86_64.h
index 5eb3a58f..3c70f206 100644
--- a/runtime/unwind/x86_64.h
+++ b/runtime/unwind/x86_64.h
@@ -137,11 +137,15 @@ static inline int arch_unw_user_mode(const struct unwind_frame_info *info)
 #else
 #ifdef STAPCONF_X86_UNIREGS	
 	return (long)info->regs.ip >= 0
+#ifdef VSYSCALL_START
 	       || (info->regs.ip >= VSYSCALL_START && info->regs.ip < VSYSCALL_END)
+#endif
 	       || (long)info->regs.sp >= 0;
 #else
 	return (long)info->regs.rip >= 0
+#ifdef VSYSCALL_START
 	       || (info->regs.rip >= VSYSCALL_START && info->regs.rip < VSYSCALL_END)
+#endif
 	       || (long)info->regs.rsp >= 0;
 #endif
 #endif
-- 
cgit