First incarnation of our Linux emulator or rather compatibility code.

This first shot only incorporaties so much functionality that DOOM
can run (the X version), signal handling is VERY weak, so is many
other things. But it meets my milestone number one (you guessed it
- running DOOM).

Uses /compat/linux as prefix for loading shared libs, so it won't
conflict with our own libs.

Kernel must be compiled with "options COMPAT_LINUX" for this to work.

1 files changed, 63 insertions, 0 deletions

diff --git a/sys/i386/linux/linux_generic.c b/sys/i386/linux/linux_generic.c
new file mode 100644
index 0000000..48df332
--- /dev/null
+++ b/sys/i386/linux/linux_generic.c
@@ -0,0 +1,63 @@
+/*-
+ * Copyright (c) 1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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 withough 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.
+ *
+ *  $Id: linux_generic.c,v 1.3 1995/06/25 17:30:46 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/exec.h>
+#include <sys/namei.h>
+#include <sys/proc.h>
+#include <sys/malloc.h>
+#include <sys/vnode.h>
+
+#include <vm/vm.h>
+
+
+static caddr_t ua_ptr = NULL;
+
+caddr_t ua_alloc_init(int len)
+{
+    caddr_t ptr;
+
+    ptr = (caddr_t)ALIGN((PS_STRINGS));
+    ptr += sizeof(struct ps_strings);
+    ua_ptr = (caddr_t)(ptr + ALIGN(len));
+    return ptr;
+}
+
+caddr_t ua_alloc(int len)
+{
+    caddr_t ptr;
+
+    ptr = ua_ptr;
+    ua_ptr += ALIGN(len);
+    return ptr;
+}