From: CSRG <csrg@ucbvax.Berkeley.EDU>
Date: Sun, 27 Mar 1983 03:25:06 +0000 (-0800)
Subject: BSD 4_1c_2 development
X-Git-Tag: BSD-4_1c_2~19
X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/commitdiff_plain/77415a98545a2118c50c35664105a48bb222d01a

BSD 4_1c_2 development
Work on file a/sys/stand/bootrl.c

Synthesized-from: CSRG/cd1/4.1c.2
---

diff --git a/a/sys/stand/bootrl.c b/a/sys/stand/bootrl.c
new file mode 100644
index 0000000000..eceea54331
--- /dev/null
+++ b/a/sys/stand/bootrl.c
@@ -0,0 +1,66 @@
+/*	bootrl.c	4.3	83/02/20	*/
+
+#include "../h/param.h"
+#include "../h/inode.h"
+#include "../h/fs.h"
+#include "../h/vm.h"
+#include <a.out.h>
+#include "saio.h"
+#include "../h/reboot.h"
+
+char bootprog[] = "rl(0,0)boot";
+
+/*
+ * Boot program... arguments passed in r10 and r11
+ * are passed through to the full boot program.
+ */
+
+main()
+{
+	register howto, devtype;	/* howto=r11, devtype=r10 */
+	int io;
+
+#ifdef lint
+	howto = 0; devtype = 0;
+#endif
+	printf("loading %s", bootprog);
+	io = open(bootprog, 0);
+	if (io >= 0)
+		copyunix(howto, devtype, io);
+	printf("boot failed");
+	_exit();
+}
+
+/*ARGSUSED*/
+copyunix(howto, devtype, io)
+	register howto, devtype, io;	/* howto=r11, devtype=r10 */
+{
+	struct exec x;
+	register 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");
+	if ((x.a_magic == 0413 || x.a_magic == 0410) &&
+	    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;
+	if (read(io, addr, x.a_data) != x.a_data)
+		goto shread;
+	addr += x.a_data;
+	x.a_bss += 128*512;	/* slop */
+	for (i = 0; i < x.a_bss; i++)
+		*addr++ = 0;
+	x.a_entry &= 0x7fffffff;
+	(*((int (*)()) x.a_entry))();
+	_exit();
+shread:
+	_stop("Short read\n");
+}