OpenSolaris Launch

1 files changed, 121 insertions, 0 deletions

diff --git a/usr/src/lib/efcode/engine/interp.c b/usr/src/lib/efcode/engine/interp.c
new file mode 100644
index 0000000000..e0e41dba01
--- /dev/null
+++ b/usr/src/lib/efcode/engine/interp.c
@@ -0,0 +1,121 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 1999 by Sun Microsystems, Inc.
+ * All rights reserved.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <stdio.h>
+
+#include <fcode/private.h>
+#include <fcode/log.h>
+
+void
+do_run(fcode_env_t *env, int next)
+{
+	token_t target, indirect;
+	void (*fn)(fcode_env_t *env);
+	int debug_state = current_debug_state(env);
+	extern void do_memory_watch(fcode_env_t *env);
+
+	for (; ; ) {
+		if (next) {
+			DEBUGF(NEXT_VITALS, output_vitals(env);
+			    log_message(MSG_FC_DEBUG, "\n"));
+			CHECK_INTERRUPT;
+			if (IP == NULL)
+				break;
+			WA = (token_t *) *IP;
+			IP++;
+		}
+		check_for_debug_entry(env);
+		indirect = *WA;
+		if (indirect & 1) {
+			target = indirect & ~1;
+			target = *((token_t *)target);
+		} else
+			target = indirect;
+		fn = (void (*)(fcode_env_t *)) target;
+		if (do_exec_debug(env, (void *)fn))
+			break;
+		if (indirect & 1) {
+			PUSH(DS, (fstack_t) (WA+1));
+			WA = (token_t *) target;
+		}
+		WA++;
+		fn(env);
+		check_vitals(env);
+		check_for_debug_exit(env);
+		do_memory_watch(env);
+		next = 1;
+	}
+	clear_debug_state(env, debug_state);
+}
+
+void
+do_semi(fcode_env_t *env)
+{
+	CHECK_RETURN_DEPTH(env, 1, ";");
+	check_semi_debug_exit(env);
+	IP = (token_t *) POP(RS);
+}
+
+void
+do_colon(fcode_env_t *env)
+{
+	PUSH(RS, (fstack_t) IP);
+	IP = WA;
+}
+
+void
+do_alias(fcode_env_t *env)
+{
+	token_t *ip;
+
+	ip = IP;
+	IP = 0;
+	WA = (token_t *) *WA;
+	do_run(env, 0);
+	IP = ip;
+}
+
+void
+execute(fcode_env_t *env)
+{
+	token_t *ip, *wa;
+
+	/*
+	 * In order to ensure that only this token executes we
+	 * force IP to zero after stashing it, then when the stack
+	 * unwinds (do_run returns) we can restore the old value.
+	 */
+	CHECK_DEPTH(env, 1, "execute");
+	ip = IP;
+	wa = WA;
+	IP = 0;
+	WA = (token_t *) POP(DS);
+	do_run(env, 0);
+	IP = ip;
+	WA = wa;
+}