From 5a16dd9bc80bc1c519c500392122c179a2942b37 Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Wed, 22 Aug 2012 22:03:35 +0400
Subject: target-xtensa: return ENOSYS for unimplemented simcalls

This prevents guest from proceeding with uninitialised garbage returned
from unimplemented simcalls.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
(cherry picked from commit e7eee62a90c671d22d50964b7de05e3f4fd96f5f)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 xtensa-semi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xtensa-semi.c b/xtensa-semi.c
index b7c8c3456..44b7dc3a1 100644
--- a/xtensa-semi.c
+++ b/xtensa-semi.c
@@ -219,6 +219,8 @@ void HELPER(simcall)(CPUXtensaState *env)
 
     default:
         qemu_log("%s(%d): not implemented\n", __func__, regs[2]);
+        regs[2] = -1;
+        regs[3] = ENOSYS;
         break;
     }
 }
-- 
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