1 /* boot.c 4.9 83/04/08 */ 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 /* 12 * Boot program... arguments passed in r10 and r11 determine 13 * whether boot stops to ask for system name and which device 14 * boot comes from. 15 */ 16 17 /* Types in r10 specifying major device */ 18 char devname[][2] = { 19 'h','p', /* 0 = hp */ 20 0,0, /* 1 = ht */ 21 'u','p', /* 2 = up */ 22 'h','k', /* 3 = hk */ 23 0,0, /* 4 = sw */ 24 0,0, /* 5 = tm */ 25 0,0, /* 6 = ts */ 26 0,0, /* 7 = mt */ 27 0,0, /* 8 = tu */ 28 'r','a', /* 9 = ra */ 29 'u','t', /* 10 = ut */ 30 'r','b', /* 11 = rb */ 31 }; 32 33 char line[100] = "xx(0,0)vmunix"; 34 35 int retry = 0; 36 37 main() 38 { 39 register howto, devtype; /* howto=r11, devtype=r10 */ 40 int io; 41 42 #ifdef lint 43 howto = 0; devtype = 0; 44 #endif 45 printf("\nBoot\n"); 46 #ifdef JUSTASK 47 howto = RB_ASKNAME|RB_SINGLE; 48 #else 49 if ((howto&RB_ASKNAME)==0) { 50 if (devtype>=0 && devtype<sizeof(devname)/2 51 && devname[devtype][0]) { 52 line[0] = devname[devtype][0]; 53 line[1] = devname[devtype][1]; 54 } else 55 howto = RB_SINGLE|RB_ASKNAME; 56 } 57 #endif 58 for (;;) { 59 if (howto & RB_ASKNAME) { 60 printf(": "); 61 gets(line); 62 } else 63 printf(": %s\n", line); 64 io = open(line, 0); 65 if (io >= 0) 66 copyunix(howto, io); 67 if (++retry > 2) 68 howto = RB_SINGLE|RB_ASKNAME; 69 } 70 } 71 72 /*ARGSUSED*/ 73 copyunix(howto, io) 74 register howto, io; 75 { 76 struct exec x; 77 register int i; 78 char *addr; 79 80 i = read(io, (char *)&x, sizeof x); 81 if (i != sizeof x || 82 (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410)) 83 _stop("Bad format\n"); 84 printf("%d", x.a_text); 85 if (x.a_magic == 0413 && lseek(io, 0x400, 0) == -1) 86 goto shread; 87 if (read(io, (char *)0, x.a_text) != x.a_text) 88 goto shread; 89 addr = (char *)x.a_text; 90 if (x.a_magic == 0413 || x.a_magic == 0410) 91 while ((int)addr & CLOFSET) 92 *addr++ = 0; 93 printf("+%d", x.a_data); 94 if (read(io, addr, x.a_data) != x.a_data) 95 goto shread; 96 addr += x.a_data; 97 printf("+%d", x.a_bss); 98 x.a_bss += 128*512; /* slop */ 99 for (i = 0; i < x.a_bss; i++) 100 *addr++ = 0; 101 x.a_entry &= 0x7fffffff; 102 printf(" start 0x%x\n", x.a_entry); 103 (*((int (*)()) x.a_entry))(); 104 _exit(); 105 shread: 106 _stop("Short read\n"); 107 } 108