From: CSRG <csrg@ucbvax.Berkeley.EDU>
Date: Tue, 12 Jan 1982 05:48:09 +0000 (-0800)
Subject: BSD 4_1_snap development
X-Git-Tag: BSD-4_1_snap~91
X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/commitdiff_plain/f83b8574e5d0382f828c336d63ac51aa071a16ad

BSD 4_1_snap development
Work on file sys/stand/boot.c

Synthesized-from: CSRG/cd1/4.1.snap
---

diff --git a/sys/stand/boot.c b/sys/stand/boot.c
new file mode 100644
index 0000000000..ae31612a90
--- /dev/null
+++ b/sys/stand/boot.c
@@ -0,0 +1,103 @@
+/*	boot.c	4.6	81/12/01	*/
+
+#include "../h/param.h"
+#include "../h/ino.h"
+#include "../h/inode.h"
+#include "../h/filsys.h"
+#include "../h/dir.h"
+#include "../h/vm.h"
+#include <a.out.h>
+#include "saio.h"
+#include <sys/reboot.h>
+
+/*
+ * Boot program... arguments passed in r10 and r11 determine
+ * whether boot stops to ask for system name and which device
+ * boot comes from.
+ */
+
+/* Types in r10 specifying major device */
+char	devname[][2] = {
+	'h','p',	/* 0 = hp */
+	0,0,		/* 1 = ht */
+	'u','p',	/* 2 = up */
+	'h','k',	/* 3 = hk */
+	0,0,		/* 4 = sw */
+	0,0,		/* 5 = tm */
+	0,0,		/* 6 = ts */
+	0,0,		/* 7 = mt */
+	0,0,		/* 8 = tu */
+	'r','a',	/* 9 = ra */
+};
+
+char line[100] = "xx(0,0)vmunix";
+
+int	retry = 0;
+
+main()
+{
+	register howto, devtype;	/* howto=r11, devtype=r10 */
+	int io;
+
+#ifdef lint
+	howto = 0; devtype = 0;
+#endif
+	printf("\nBoot\n");
+#ifdef JUSTASK
+	howto = RB_ASKNAME|RB_SINGLE;
+#else
+	if ((howto&RB_ASKNAME)==0) {
+		if (devtype>=0 && devtype<sizeof(devname)/2
+		    && devname[devtype][0]) {
+			line[0] = devname[devtype][0];
+			line[1] = devname[devtype][1];
+		} else
+			howto = RB_SINGLE|RB_ASKNAME;
+	}
+#endif
+	for (;;) {
+		if (howto & RB_ASKNAME) {
+			printf(": ");
+			gets(line);
+		} else
+			printf(": %s\n", line);
+		io = open(line, 0);
+		if (io >= 0)
+			copyunix(howto, io);
+		if (++retry > 2)
+			howto = RB_SINGLE|RB_ASKNAME;
+	}
+}
+
+/*ARGSUSED*/
+copyunix(howto, io)
+	register howto, io;
+{
+	struct exec x;
+	register int i;
+	char *addr;
+
+	i = read(io, (char *)&x, sizeof x);
+	if (i != sizeof x || x.a_magic != 0410)
+		_stop("Bad format\n");
+	printf("%d", x.a_text);
+	if (read(io, (char *)0, x.a_text) != x.a_text)
+		goto shread;
+	addr = (char *)x.a_text;
+	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;
+	x.a_entry &= 0x7fffffff;
+	printf(" start 0x%x\n", x.a_entry);
+	(*((int (*)()) x.a_entry))();
+	_exit();
+shread:
+	_stop("Short read\n");
+}