From ee9d5bdd950bb05549bddc614c3c5ce9d10a5b08 Mon Sep 17 00:00:00 2001
From: Elliott Hughes <enh@google.com>
Date: Fri, 30 May 2014 11:15:32 -0700
Subject: [PATCH] x86: stop unwinding past __bionic_clone.

The apparent "previous" frame is on another thread's stack.

Bug: 14270816
Bug: 15195760
Change-Id: I884f370e116203c5fa3b05a75fb8f356537261c4
---
 libc/arch-x86/bionic/__bionic_clone.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libc/arch-x86/bionic/__bionic_clone.S b/libc/arch-x86/bionic/__bionic_clone.S
index af6ef1907..7c972de54 100644
--- a/libc/arch-x86/bionic/__bionic_clone.S
+++ b/libc/arch-x86/bionic/__bionic_clone.S
@@ -38,6 +38,8 @@ ENTRY(__bionic_clone)
         jmp     .L_bc_return
 
 .L_bc_child:
+        # We don't want anyone to unwind past this point.
+        .cfi_undefined %eip
         call    __bionic_clone_entry
         hlt