1*3261Swnj /* boot.c 4.2 81/03/15 */ 2315Sbill 3315Sbill #include "../h/param.h" 4315Sbill #include "../h/ino.h" 5315Sbill #include "../h/inode.h" 6315Sbill #include "../h/filsys.h" 7315Sbill #include "../h/dir.h" 8315Sbill #include "../h/vm.h" 9315Sbill #include <a.out.h> 10315Sbill #include "saio.h" 111466Sbill #include <sys/reboot.h> 12315Sbill 131466Sbill /* 141466Sbill * Boot program... arguments passed in r10 and r11 determine 151466Sbill * whether boot stops to ask for system name and which device 161466Sbill * boot comes from. 171466Sbill */ 18315Sbill 191466Sbill /* Types in r10 specifying major device */ 201466Sbill char devname[][2] = { 211466Sbill 'h','p', /* 0 = hp */ 221466Sbill 0,0, /* 1 = ht */ 231466Sbill 'u','p', /* 2 = up */ 24*3261Swnj 'h','k', /* 3 = hk */ 251466Sbill }; 261466Sbill 271466Sbill char line[100] = "xx(0,0)vmunix"; 281466Sbill 29315Sbill main() 30315Sbill { 311466Sbill register howto, devtype; /* howto=r11, devtype=r10 */ 321466Sbill int io, retry; 33315Sbill 34315Sbill printf("\nBoot\n"); 351575Sbill #ifdef JUSTASK 361593Sbill howto = RB_ASKNAME|RB_SINGLE; 371575Sbill #else 381466Sbill if ((howto&RB_ASKNAME)==0) { 391466Sbill if (devtype>=0 && devtype<sizeof(devname)/2 401466Sbill && devname[devtype][0]) { 411466Sbill line[0] = devname[devtype][0]; 421466Sbill line[1] = devname[devtype][1]; 43*3261Swnj } else 441466Sbill howto = RB_SINGLE|RB_ASKNAME; 451466Sbill } 461575Sbill #endif 471466Sbill retry = 0; 481466Sbill for (;;) { 491466Sbill if (howto & RB_ASKNAME) { 501466Sbill printf(": "); 511466Sbill gets(line); 521466Sbill } else 531466Sbill printf(": %s\n", line); 541466Sbill io = open(line, 0); 551466Sbill if (io >= 0) 561466Sbill copyunix(howto, io); 571466Sbill if (++retry > 2) 581466Sbill howto = RB_SINGLE|RB_ASKNAME; 591466Sbill } 60315Sbill } 61315Sbill 621466Sbill copyunix(howto, io) 631466Sbill register howto, io; 64315Sbill { 65315Sbill struct exec x; 66315Sbill register int i; 67315Sbill char *addr; 68315Sbill 69315Sbill i = read(io, (char *)&x, sizeof x); 70315Sbill if (i != sizeof x || x.a_magic != 0410) 71315Sbill _stop("Bad format\n"); 72315Sbill printf("%d", x.a_text); 73315Sbill if (read(io, (char *)0, x.a_text) != x.a_text) 74315Sbill goto shread; 75315Sbill addr = (char *)x.a_text; 76315Sbill while ((int)addr & CLOFSET) 77315Sbill *addr++ = 0; 78315Sbill printf("+%d", x.a_data); 79315Sbill if (read(io, addr, x.a_data) != x.a_data) 80315Sbill goto shread; 81315Sbill addr += x.a_data; 82315Sbill printf("+%d", x.a_bss); 83315Sbill x.a_bss += 128*512; /* slop */ 84315Sbill for (i = 0; i < x.a_bss; i++) 85315Sbill *addr++ = 0; 86315Sbill x.a_entry &= 0x7fffffff; 87315Sbill printf(" start 0x%x\n", x.a_entry); 88315Sbill (*((int (*)()) x.a_entry))(); 89315Sbill _exit(); 90315Sbill shread: 91315Sbill _stop("Short read\n"); 92315Sbill } 93