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-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e7eee62a90c671d22d50964b7de05e3f4fd96f5f;p=qemu.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>
---

diff --git a/target-xtensa/xtensa-semi.c b/target-xtensa/xtensa-semi.c
index 1c8a19ed56..6d001c2c1a 100644
--- a/target-xtensa/xtensa-semi.c
+++ b/target-xtensa/xtensa-semi.c
@@ -218,6 +218,8 @@ void HELPER(simcall)(CPUXtensaState *env)
 
     default:
         qemu_log("%s(%d): not implemented\n", __func__, regs[2]);
+        regs[2] = -1;
+        regs[3] = ENOSYS;
         break;
     }
 }