File 0015-linux-user-arm-no-tb_flush-on-reset.patch of Package qemu-linux-user.openSUSE_Leap_42.1_Update
From 5673fb20cd6c5c9ed6fd27e878d369e9f4283a2b Mon Sep 17 00:00:00 2001
From: Alexander Graf <agraf@suse.de>
Date: Tue, 29 May 2012 15:30:01 +0200
Subject: [PATCH] linux-user: arm: 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.
---
target-arm/cpu.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/target-arm/cpu.c b/target-arm/cpu.c
index 986f04c..7d71c9d 100644
--- a/target-arm/cpu.c
+++ b/target-arm/cpu.c
@@ -191,9 +191,12 @@ static void arm_cpu_reset(CPUState *s)
&env->vfp.fp_status);
set_float_detect_tininess(float_tininess_before_rounding,
&env->vfp.standard_fp_status);
- tlb_flush(s, 1);
#ifndef CONFIG_USER_ONLY
+ /* XXX hack alert! automoc4 segfaults after spawning a new thread with this
+ flush enabled */
+ tlb_flush(s, 1);
+
if (kvm_enabled()) {
kvm_arm_reset_vcpu(cpu);
}