123220Smckusick /* 229293Smckusick * Copyright (c) 1982, 1986 Regents of the University of California. 323220Smckusick * All rights reserved. The Berkeley software License Agreement 423220Smckusick * specifies the terms and conditions for redistribution. 523220Smckusick * 6*45803Sbostic * @(#)bootxx.c 7.6 (Berkeley) 12/16/90 723220Smckusick */ 87464Skre 9*45803Sbostic #include "sys/param.h" 10*45803Sbostic #include "sys/vm.h" 11*45803Sbostic #include "sys/reboot.h" 127464Skre #include <a.out.h> 13*45803Sbostic #include "stand/saio.h" 147464Skre 1532199Skarels char bootprog[] = "boot"; 1632199Skarels extern unsigned opendev; 177464Skre 187464Skre /* 197464Skre * Boot program... arguments passed in r10 and r11 207464Skre * are passed through to the full boot program. 217464Skre */ 227464Skre 237464Skre main() 247464Skre { 2526828Skarels register unsigned howto, devtype; /* howto=r11, devtype=r10 */ 2626828Skarels int io, unit, partition; 2726828Skarels register char *cp; 287464Skre 297464Skre #ifdef lint 3032199Skarels howto = 0; devtype = 0; devtype = devtype; 317464Skre #endif 3225438Skarels printf("loading %s\n", bootprog); 337464Skre io = open(bootprog, 0); 347464Skre if (io >= 0) 3532199Skarels copyunix(howto, opendev, io); 3625438Skarels _stop("boot failed\n"); 377464Skre } 387464Skre 397464Skre /*ARGSUSED*/ 407464Skre copyunix(howto, devtype, io) 417464Skre register howto, devtype, io; /* howto=r11, devtype=r10 */ 427464Skre { 437464Skre struct exec x; 447464Skre register int i; 457464Skre char *addr; 467464Skre 477464Skre i = read(io, (char *)&x, sizeof x); 4833430Sbostic if (i != sizeof x || N_BADMAG(x)) 497464Skre _stop("Bad format\n"); 5033430Sbostic if ((x.a_magic == ZMAGIC || x.a_magic == NMAGIC) && 5133430Sbostic lseek(io, 0x400, L_SET) == -1) 527464Skre goto shread; 537464Skre if (read(io, (char *)0, x.a_text) != x.a_text) 547464Skre goto shread; 557464Skre addr = (char *)x.a_text; 5633430Sbostic if (x.a_magic == ZMAGIC || x.a_magic == NMAGIC) 577464Skre while ((int)addr & CLOFSET) 587464Skre *addr++ = 0; 597464Skre if (read(io, addr, x.a_data) != x.a_data) 607464Skre goto shread; 617464Skre addr += x.a_data; 627464Skre x.a_bss += 128*512; /* slop */ 637464Skre for (i = 0; i < x.a_bss; i++) 647464Skre *addr++ = 0; 657464Skre x.a_entry &= 0x7fffffff; 667464Skre (*((int (*)()) x.a_entry))(); 6725438Skarels return; 687464Skre shread: 697464Skre _stop("Short read\n"); 707464Skre } 71