/* $OpenBSD: exec_sun.c,v 1.2 2000/03/03 00:54:51 todd Exp $ */ /*- * Copyright (c) 1995 Theo de Raadt * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Theo de Raadt * 4. The name of the Author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Copyright (c) 1982, 1986, 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)boot.c 8.1 (Berkeley) 6/10/93 */ #include #include #include #include "stand.h" extern int debug; extern u_int bootdev; /*ARGSUSED*/ exec_sun(file, loadaddr, howto) char *file; char *loadaddr; int howto; { register int io; struct exec x; int cc, magic; void (*entry)(); register char *cp; register int *ip; int textlen; #ifdef DEBUG printf("exec_sun: file=%s loadaddr=0x%x\n", file, loadaddr); #endif io = open(file, 0); if (io < 0) return(-1); /* * Read in the exec header, and validate it. */ if (read(io, (char *)&x, sizeof(x)) != sizeof(x)) goto shread; if (N_BADMAG(x)) { errno = EFTYPE; goto closeout; } cp = x.a_entry; /* loadaddr; */ textlen = x.a_text; magic = N_GETMAGIC(x); if (magic == ZMAGIC) { cp += sizeof(x); textlen -= sizeof(x); } entry = (void (*)())cp; printf ("Entry at %x\n", cp); /* * Leave a copy of the exec header before the text. * The sun3 kernel uses this to verify that the * symbols were loaded by this boot program. */ bcopy(&x, cp - sizeof(x), sizeof(x)); /* * Read in the text segment. */ printf("%x", x.a_text); if (read(io, cp, textlen) != textlen) goto shread; cp += textlen; /* * NMAGIC may have a gap between text and data. */ if (magic == NMAGIC) { register int mask = N_PAGSIZ(x) - 1; while ((int)cp & mask) *cp++ = 0; } /* * Read in the data segment. */ printf("+%x", x.a_data); if (read(io, cp, x.a_data) != x.a_data) goto shread; cp += x.a_data; /* * Zero out the BSS section. * (Kernel does not do it itself) */ printf("+%x", x.a_bss); cc = x.a_bss; while ((int)cp & 3) { *cp++ = 0; --cc; } ip = (int *)cp; cp += cc; while ((char *)ip < cp) *ip++ = 0; /* * Read in the symbol table and strings. * (Always set the symtab size word.) */ *ip++ = x.a_syms; cp = (char *)ip; if (x.a_syms > 0) { /* Symbol table and string table length word. */ cc = x.a_syms; printf("+[%x", cc); cc += sizeof(int); /* strtab length too */ if (read(io, cp, cc) != cc) goto shread; cp += x.a_syms; ip = (int *)cp; /* points to strtab length */ cp += sizeof(int); /* String table. Length word includes itself. */ cc = *ip; printf("+%x]", cc); cc -= sizeof(int); if (cc <= 0) goto shread; if (read(io, cp, cc) != cc) goto shread; cp += cc; } printf("=%x\n", cp - loadaddr); close(io); if (debug) { printf("Debug mode - enter c to continue\n"); } printf("Starting program at 0x%x\n", (int)entry); (*entry)(howto, bootdev, cp, 0, 0); panic("exec returned"); shread: printf("exec: short read\n"); errno = EIO; closeout: close(io); return(-1); }