[PATCH] target/hppa: mask upper iaoq bits when returning to narrow mode

[Sven Schnelle <svens@stackframe.org>]

For unknown reasons, Java 1.5 on 64-bit HP-UX 11.11 does signed
computation of the new IAOQ value in the signal handler. In the
current code these bits are not masked when returning to narrow
mode, causing java to crash.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
---
 target/hppa/sys_helper.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/hppa/sys_helper.c b/target/hppa/sys_helper.c
index 208e51c086..3bbc2da71b 100644
--- a/target/hppa/sys_helper.c
+++ b/target/hppa/sys_helper.c
@@ -83,6 +83,10 @@ void HELPER(rfi)(CPUHPPAState *env)
     env->iaoq_f = env->cr[CR_IIAOQ];
     env->iaoq_b = env->cr_back[1];
 
+    if (!(env->cr[CR_IPSW] & PSW_W)) {
+        env->iaoq_f &= 0xffffffff;
+        env->iaoq_b &= 0xffffffff;
+    }
     /*
      * For pa2.0, IIASQ is the top bits of the virtual address.
      * To recreate the space identifier, remove the offset bits.
-- 
2.43.2