projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 77415a98 C |
1 | /* bootrl.c 4.3 83/02/20 */ |
| 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 | ||
| 11 | char bootprog[] = "rl(0,0)boot"; | |
| 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 | } |