date and time created 90/04/24 19:56:19 by william

SCCS-vsn: sys/i386/stand/boot.c 7.1

diff --git a/usr/src/sys/i386/stand/boot.c b/usr/src/sys/i386/stand/boot.c
new file mode 100644 (file)
index 0000000..3ea1d61
--- /dev/null
+++ b/usr/src/sys/i386/stand/boot.c
@@ -0,0 +1,111 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * %sccs.include.noredist.c%
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1990 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)boot.c     7.1 (Berkeley) %G%";
+#endif /* not lint */
+
+#include "../h/param.h"
+#include "../h/inode.h"
+#include "../h/fs.h"
+#include "../h/dir.h"
+#include "../h/reboot.h"
+#include "../h/disk.h"
+#include <a.out.h>
+#include "saio.h"
+
+/*
+ * Boot program... arguments passed in r6 and r7 determine
+ * whether boot stops to ask for system name and which device
+ * boot comes from.
+ */
+
+#define        UNIX    "/vmunix"
+
+char line[100] = UNIX;
+char line2[100] = "/stand/";
+extern int howto, bootdev, unit, cyloffset, boottype;
+extern int opendev, openfirst;
+int    retry = 0;
+
+main()
+{
+       int io;
+
+howto = RB_SINGLE|RB_ASKNAME;
+       for (;;) {
+               if (howto & RB_ASKNAME) {
+                       printf("Boot: ");
+                       gets(line);
+               } else
+                       printf("Boot: %s\n", line);
+               if (line[0] == 0) {
+                       strcpy(line, UNIX);
+                       printf("Boot: %s\n", line);
+               }
+
+               io = open(line, 0);
+               /*if (io < 0) {
+                       strcat(line2,line) ;
+                       io = open(line2, 0);
+               }*/
+               if (io >= 0) {
+                       bootdev = opendev;
+                       copyunix(io);
+               }
+               openfirst = 1;
+               if (++retry > 2)
+                       howto = RB_SINGLE|RB_ASKNAME;
+       }
+}
+
+/*ARGSUSED*/
+copyunix(io)
+       register io;
+{
+       struct exec x;
+       int i;
+       char *addr;
+
+       i = read(io, (char *)&x, sizeof x);
+       if (i != sizeof x ||
+           (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410))
+               _stop("Bad format\n");
+       printf("%d", x.a_text);
+       if (x.a_magic == 0413 && lseek(io, 0x400, 0) == -1)
+               goto shread;
+       if (read(io, (char *)0, x.a_text) != x.a_text)
+               goto shread;
+       addr = (char *)x.a_text;
+       if (x.a_magic == 0413 || x.a_magic == 0410)
+               while ((int)addr & CLOFSET)
+                       *addr++ = 0;
+       printf("+%d", x.a_data);
+       if (read(io, addr, x.a_data) != x.a_data)
+               goto shread;
+       addr += x.a_data;
+       printf("+%d", x.a_bss);
+       x.a_bss += 128*512;     /* slop */
+       for (i = 0; i < x.a_bss; i++)
+               *addr++ = 0;
+       printf(" start 0x%x\n", x.a_entry);
+       setregs() ;
+       i = (*((int (*)()) x.a_entry))();
+       if (i) printf("exit %d\n", i) ; 
+       return;
+shread:
+       _stop("Short read\n");
+}