[Qemu-devel] [PATCH for-1.2 v2] target-xtensa: return ENOSYS for unimplemented simcalls

[Max Filippov]

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

Signed-off-by: Max Filippov <address@hidden>
---
 target-xtensa/xtensa-semi.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/target-xtensa/xtensa-semi.c b/target-xtensa/xtensa-semi.c
index 1c8a19e..6d001c2 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;
     }
 }
-- 
1.7.7.6