1 /* boot.c 4.5 81/11/12 */ 2 3 #include "../h/param.h" 4 #include "../h/ino.h" 5 #include "../h/inode.h" 6 #include "../h/filsys.h" 7 #include "../h/dir.h" 8 #include "../h/vm.h" 9 #include <a.out.h> 10 #include "saio.h" 11 #include <sys/reboot.h> 12 13 /* 14 * Boot program... arguments passed in r10 and r11 determine 15 * whether boot stops to ask for system name and which device 16 * boot comes from. 17 */ 18 19 /* Types in r10 specifying major device */ 20 char devname[][2] = { 21 'h','p', /* 0 = hp */ 22 0,0, /* 1 = ht */ 23 'u','p', /* 2 = up */ 24 'h','k', /* 3 = hk */ 25 0,0, /* 4 = sw */ 26 0,0, /* 5 = tm */ 27 0,0, /* 6 = ts */ 28 0,0, /* 7 = mt */ 29 0,0, /* 8 = tu */ 30 'r','a', /* 9 = ra */ 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 || x.a_magic != 0410) 82 _stop("Bad format\n"); 83 printf("%d", x.a_text); 84 if (read(io, (char *)0, x.a_text) != x.a_text) 85 goto shread; 86 addr = (char *)x.a_text; 87 while ((int)addr & CLOFSET) 88 *addr++ = 0; 89 printf("+%d", x.a_data); 90 if (read(io, addr, x.a_data) != x.a_data) 91 goto shread; 92 addr += x.a_data; 93 printf("+%d", x.a_bss); 94 x.a_bss += 128*512; /* slop */ 95 for (i = 0; i < x.a_bss; i++) 96 *addr++ = 0; 97 x.a_entry &= 0x7fffffff; 98 printf(" start 0x%x\n", x.a_entry); 99 (*((int (*)()) x.a_entry))(); 100 _exit(); 101 shread: 102 _stop("Short read\n"); 103 } 104