projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 3fd40431 WN |
1 | /*- |
| 2 | * Copyright (c) 1990 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * William Jolitz. | |
| 7 | * | |
| 8 | * %sccs.include.noredist.c% | |
| 9 | */ | |
| 10 | ||
| 11 | #ifndef lint | |
| 12 | char copyright[] = | |
| 13 | "@(#) Copyright (c) 1990 The Regents of the University of California.\n\ | |
| 14 | All rights reserved.\n"; | |
| 15 | #endif /* not lint */ | |
| 16 | ||
| 17 | #ifndef lint | |
| 18 | static char sccsid[] = "@(#)boot.c 7.1 (Berkeley) %G%"; | |
| 19 | #endif /* not lint */ | |
| 20 | ||
| 21 | #include "../h/param.h" | |
| 22 | #include "../h/inode.h" | |
| 23 | #include "../h/fs.h" | |
| 24 | #include "../h/dir.h" | |
| 25 | #include "../h/reboot.h" | |
| 26 | #include "../h/disk.h" | |
| 27 | #include <a.out.h> | |
| 28 | #include "saio.h" | |
| 29 | ||
| 30 | /* | |
| 31 | * Boot program... arguments passed in r6 and r7 determine | |
| 32 | * whether boot stops to ask for system name and which device | |
| 33 | * boot comes from. | |
| 34 | */ | |
| 35 | ||
| 36 | #define UNIX "/vmunix" | |
| 37 | ||
| 38 | char line[100] = UNIX; | |
| 39 | char line2[100] = "/stand/"; | |
| 40 | extern int howto, bootdev, unit, cyloffset, boottype; | |
| 41 | extern int opendev, openfirst; | |
| 42 | int retry = 0; | |
| 43 | ||
| 44 | main() | |
| 45 | { | |
| 46 | int io; | |
| 47 | ||
| 48 | howto = RB_SINGLE|RB_ASKNAME; | |
| 49 | for (;;) { | |
| 50 | if (howto & RB_ASKNAME) { | |
| 51 | printf("Boot: "); | |
| 52 | gets(line); | |
| 53 | } else | |
| 54 | printf("Boot: %s\n", line); | |
| 55 | if (line[0] == 0) { | |
| 56 | strcpy(line, UNIX); | |
| 57 | printf("Boot: %s\n", line); | |
| 58 | } | |
| 59 | ||
| 60 | io = open(line, 0); | |
| 61 | /*if (io < 0) { | |
| 62 | strcat(line2,line) ; | |
| 63 | io = open(line2, 0); | |
| 64 | }*/ | |
| 65 | if (io >= 0) { | |
| 66 | bootdev = opendev; | |
| 67 | copyunix(io); | |
| 68 | } | |
| 69 | openfirst = 1; | |
| 70 | if (++retry > 2) | |
| 71 | howto = RB_SINGLE|RB_ASKNAME; | |
| 72 | } | |
| 73 | } | |
| 74 | ||
| 75 | /*ARGSUSED*/ | |
| 76 | copyunix(io) | |
| 77 | register io; | |
| 78 | { | |
| 79 | struct exec x; | |
| 80 | int i; | |
| 81 | char *addr; | |
| 82 | ||
| 83 | i = read(io, (char *)&x, sizeof x); | |
| 84 | if (i != sizeof x || | |
| 85 | (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410)) | |
| 86 | _stop("Bad format\n"); | |
| 87 | printf("%d", x.a_text); | |
| 88 | if (x.a_magic == 0413 && lseek(io, 0x400, 0) == -1) | |
| 89 | goto shread; | |
| 90 | if (read(io, (char *)0, x.a_text) != x.a_text) | |
| 91 | goto shread; | |
| 92 | addr = (char *)x.a_text; | |
| 93 | if (x.a_magic == 0413 || x.a_magic == 0410) | |
| 94 | while ((int)addr & CLOFSET) | |
| 95 | *addr++ = 0; | |
| 96 | printf("+%d", x.a_data); | |
| 97 | if (read(io, addr, x.a_data) != x.a_data) | |
| 98 | goto shread; | |
| 99 | addr += x.a_data; | |
| 100 | printf("+%d", x.a_bss); | |
| 101 | x.a_bss += 128*512; /* slop */ | |
| 102 | for (i = 0; i < x.a_bss; i++) | |
| 103 | *addr++ = 0; | |
| 104 | printf(" start 0x%x\n", x.a_entry); | |
| 105 | setregs() ; | |
| 106 | i = (*((int (*)()) x.a_entry))(); | |
| 107 | if (i) printf("exit %d\n", i) ; | |
| 108 | return; | |
| 109 | shread: | |
| 110 | _stop("Short read\n"); | |
| 111 | } |