From: Max Filippov <jcmvbkbc@gmail.com>
Date: Wed, 22 Aug 2012 18:03:35 +0000 (+0400)
Subject: target-xtensa: return ENOSYS for unimplemented simcalls
X-Git-Tag: v1.1.2~3
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5a16dd9bc80bc1c519c500392122c179a2942b37;p=thirdparty%2Fqemu.git

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>
---

diff --git a/xtensa-semi.c b/xtensa-semi.c
index b7c8c345643..44b7dc3a12f 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;
     }
 }