Import of original NetBSD's ibcs2 emulator sources by Scott Bartram,

which is used as a basis for a more complete and cleaner ibcs2 emulator.
(snapshot about May 1995 with a few files from September 1995)

Some files and code from old emulator still remains.
New files, features, and changes have been implemented by myself,
which will be shown in following commits.

1 files changed, 82 insertions, 0 deletions

diff --git a/sys/i386/ibcs2/ibcs2_util.h b/sys/i386/ibcs2/ibcs2_util.h
new file mode 100644
index 0000000..6aa4e8c
--- /dev/null
+++ b/sys/i386/ibcs2/ibcs2_util.h
@@ -0,0 +1,82 @@
+
+/*
+ * Copyright (c) 1994 Christos Zoulas
+ * Copyright (c) 1995 Frank van der Linden
+ * Copyright (c) 1995 Scott Bartram
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * from: svr4_util.h,v 1.5 1994/11/18 02:54:31 christos Exp
+ * from: linux_util.h,v 1.2 1995/03/05 23:23:50 fvdl Exp
+ */
+
+/*
+ * This file is pretty much the same as Christos' svr4_util.h
+ * (for now).
+ */
+
+#ifndef	_IBCS2_UTIL_H_
+#define	_IBCS2_UTIL_H_
+
+#include <machine/vmparam.h>
+#include <sys/exec.h>
+#include <sys/cdefs.h>
+
+static __inline caddr_t
+stackgap_init()
+{
+	extern char     sigcode[], esigcode[];
+#define szsigcode ((caddr_t)(esigcode - sigcode))
+	return STACKGAPBASE;
+}
+
+
+static __inline void *
+stackgap_alloc(sgp, sz)
+	caddr_t	*sgp;
+	size_t   sz;
+{
+	void	*p = (void *) *sgp;
+	*sgp += ALIGN(sz);
+	return p;
+}
+
+#ifdef DEBUG_IBCS2
+#define DPRINTF(a)      printf a;
+#else
+#define DPRINTF(a)
+#endif
+
+extern const char ibcs2_emul_path[];
+
+int ibcs2_emul_find __P((struct proc *, caddr_t *, const char *, char *,
+			char **, int));
+
+#define CHECKALTEXIST(p, sgp, path) \
+    ibcs2_emul_find(p, sgp, ibcs2_emul_path, path, &(path), 0)
+
+#define CHECKALTCREAT(p, sgp, path) \
+    ibcs2_emul_find(p, sgp, ibcs2_emul_path, path, &(path), 1)
+
+#endif /* !_IBCS2_UTIL_H_ */