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 (file)
index 0000000..eceea54
--- /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");
+}