File 0015-target-arm-linux-user-no-tb_flush-on-reset.patch of Package qemu

From: Alexander Graf <agraf@suse.de>
Date: Tue, 29 May 2012 15:30:01 +0200
Subject: target-arm: linux-user: no tb_flush on reset

When running automoc4 as linux-user guest program, it segfaults right after
it creates a thread. Bisecting pointed to commit a84fac1426 which introduces
tb_flush on reset.

So something in our thread creation is broken. But for now, let's revert the
change to at least get a working build again.

[AF: Rebased, fixed typo]
---
 target-arm/cpu.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/target-arm/cpu.c b/target-arm/cpu.c
index 5ce7350..345a61c 100644
--- a/target-arm/cpu.c
+++ b/target-arm/cpu.c
@@ -181,6 +181,15 @@ static void arm_cpu_reset(CPUState *s)
     set_float_detect_tininess(float_tininess_before_rounding,
                               &env->vfp.standard_fp_status);
     tlb_flush(s, 1);
+    /* Reset is a state change for some CPUARMState fields which we
+     * bake assumptions about into translated code, so we need to
+     * tb_flush().
+     */
+#if !defined(CONFIG_USER_ONLY)
+    /* XXX hack alert! automoc4 segfaults after spawning a new thread with
+     *     this flush enabled */
+    tb_flush(env);
+#endif
 
 #ifndef CONFIG_USER_ONLY
     if (kvm_enabled()) {