Commit | Line | Data |
---|---|---|
92e67171 | 1 | /* bootxx.c 6.1 83/07/29 */ |
b6c81d5e RE |
2 | |
3 | #include "../h/param.h" | |
4 | #include "../h/inode.h" | |
5 | #include "../h/fs.h" | |
6 | #include "../h/vm.h" | |
7 | #include <a.out.h> | |
8 | #include "saio.h" | |
9 | #include "../h/reboot.h" | |
10 | ||
48bd94ac | 11 | char bootprog[] = "xx(0,0)boot"; |
b6c81d5e RE |
12 | |
13 | /* | |
14 | * Boot program... arguments passed in r10 and r11 | |
15 | * are passed through to the full boot program. | |
16 | */ | |
17 | ||
18 | main() | |
19 | { | |
20 | register howto, devtype; /* howto=r11, devtype=r10 */ | |
21 | int io; | |
22 | ||
23 | #ifdef lint | |
24 | howto = 0; devtype = 0; | |
25 | #endif | |
26 | printf("loading %s", bootprog); | |
27 | io = open(bootprog, 0); | |
28 | if (io >= 0) | |
29 | copyunix(howto, devtype, io); | |
30 | printf("boot failed"); | |
31 | _exit(); | |
32 | } | |
33 | ||
34 | /*ARGSUSED*/ | |
35 | copyunix(howto, devtype, io) | |
36 | register howto, devtype, io; /* howto=r11, devtype=r10 */ | |
37 | { | |
38 | struct exec x; | |
39 | register int i; | |
40 | char *addr; | |
41 | ||
42 | i = read(io, (char *)&x, sizeof x); | |
43 | if (i != sizeof x || | |
44 | (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410)) | |
45 | _stop("Bad format\n"); | |
46 | if ((x.a_magic == 0413 || x.a_magic == 0410) && | |
47 | lseek(io, 0x400, 0) == -1) | |
48 | goto shread; | |
49 | if (read(io, (char *)0, x.a_text) != x.a_text) | |
50 | goto shread; | |
51 | addr = (char *)x.a_text; | |
52 | if (x.a_magic == 0413 || x.a_magic == 0410) | |
53 | while ((int)addr & CLOFSET) | |
54 | *addr++ = 0; | |
55 | if (read(io, addr, x.a_data) != x.a_data) | |
56 | goto shread; | |
57 | addr += x.a_data; | |
58 | x.a_bss += 128*512; /* slop */ | |
59 | for (i = 0; i < x.a_bss; i++) | |
60 | *addr++ = 0; | |
61 | x.a_entry &= 0x7fffffff; | |
62 | (*((int (*)()) x.a_entry))(); | |
63 | _exit(); | |
64 | shread: | |
65 | _stop("Short read\n"); | |
66 | } |