target/hppa: Fix calculation of CR_IIASQ back register

Need to use iasq_b and iaoq_b to determine back register of CR_IIASQ.
This fixes random faults when booting up Linux user space.

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/target/hppa/int_helper.c b/target/hppa/int_helper.c
index 467ee7daf5ce48049fbe6159361c60662f59e608..98e9d688f64070e7b93974c649a1a62df5ed8d23 100644 (file)
--- a/target/hppa/int_helper.c
+++ b/target/hppa/int_helper.c
@@ -126,7 +126,7 @@ void hppa_cpu_do_interrupt(CPUState *cs)
         env->cr[CR_IIASQ] =
             hppa_form_gva_psw(old_psw, env->iasq_f, env->iaoq_f) >> 32;
         env->cr_back[0] =
-            hppa_form_gva_psw(old_psw, env->iasq_f, env->iaoq_f) >> 32;
+            hppa_form_gva_psw(old_psw, env->iasq_b, env->iaoq_b) >> 32;
     } else {
         env->cr[CR_IIASQ] = 0;
         env->cr_back[0] = 0;