sim: callback: add a kill interface

This will make it easier to emulate the syscall.  If the kill target
is the sim itself, don't do anything.  This forces the higher layers
to make a decision as to how to handle this event: like halting the
overall engine process.

1 files changed, 18 insertions, 0 deletions

diff --git a/sim/common/syscall.c b/sim/common/syscall.c
index 7ef34b9..6efddcf 100644
--- a/sim/common/syscall.c
+++ b/sim/common/syscall.c
@@ -583,6 +583,24 @@ cb_syscall (host_callback *cb, CB_SYSCALL *sc)
       result = (*cb->getpid) (cb);
       break;
 
+    case CB_SYS_kill:
+      /* If killing self, leave it to the caller to process so it can send the
+	 signal to the engine.  */
+      if (sc->arg1 == (*cb->getpid) (cb))
+	{
+	  result = -1;
+	  errcode = ENOSYS;
+	}
+      else
+	{
+	  int signum = cb_target_to_host_signal (cb, sc->arg2);
+
+	  result = (*cb->kill) (cb, sc->arg1, signum);
+	  cb->last_errno = errno;
+	  goto ErrorFinish;
+	}
+      break;
+
     case CB_SYS_time :
       {
 	/* FIXME: May wish to change CB_SYS_time to something else.