loadfile_aout.c

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    1 /* $NetBSD: loadfile_aout.c,v 1.6 2003/08/31 22:40:48 fvdl Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
    9  * NASA Ames Research Center and by Christos Zoulas.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *      This product includes software developed by the NetBSD
   22  *      Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 
   40 /*
   41  * Copyright (c) 1992, 1993
   42  *      The Regents of the University of California.  All rights reserved.
   43  *
   44  * This code is derived from software contributed to Berkeley by
   45  * Ralph Campbell.
   46  *
   47  * Redistribution and use in source and binary forms, with or without
   48  * modification, are permitted provided that the following conditions
   49  * are met:
   50  * 1. Redistributions of source code must retain the above copyright
   51  *    notice, this list of conditions and the following disclaimer.
   52  * 2. Redistributions in binary form must reproduce the above copyright
   53  *    notice, this list of conditions and the following disclaimer in the
   54  *    documentation and/or other materials provided with the distribution.
   55  * 3. Neither the name of the University nor the names of its contributors
   56  *    may be used to endorse or promote products derived from this software
   57  *    without specific prior written permission.
   58  *
   59  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   69  * SUCH DAMAGE.
   70  *
   71  *      @(#)boot.c      8.1 (Berkeley) 6/10/93
   72  */
   73 
   74 #ifdef _STANDALONE
   75 #include <lib/libsa/stand.h>
   76 #include <lib/libkern/libkern.h>
   77 #else           
   78 #include <stdio.h>
   79 #include <string.h>
   80 #include <errno.h>
   81 #include <stdlib.h>
   82 #include <unistd.h>  
   83 #include <fcntl.h>
   84 #include <err.h>
   85 #endif  
   86 
   87 #include <sys/param.h> 
   88 #include <sys/exec.h>
   89 
   90 #include "loadfile.h"
   91 
   92 #ifdef BOOT_AOUT
   93 
   94 int
   95 loadfile_aout(fd, x, marks, flags)
   96         int fd;
   97         struct exec *x;
   98         u_long *marks;
   99         int flags;
  100 {
  101         u_long entry = x->a_entry;
  102         paddr_t aoutp = 0;
  103         paddr_t minp, maxp;
  104         int cc;
  105         paddr_t offset = marks[MARK_START];
  106         u_long magic = N_GETMAGIC(*x);
  107         int sub;
  108 
  109         /* some ports dont use the offset */
  110         offset = offset;
  111 
  112         /* In OMAGIC and NMAGIC, exec header isn't part of text segment */
  113         if (magic == OMAGIC || magic == NMAGIC)
  114                 sub = 0;
  115         else
  116                 sub = sizeof(*x);
  117         
  118         minp = maxp = ALIGNENTRY(entry);
  119 
  120         if (lseek(fd, sizeof(*x), SEEK_SET) == -1)  {
  121                 WARN(("lseek text"));
  122                 return 1;
  123         }
  124 
  125         /*
  126          * Leave a copy of the exec header before the text.
  127          * The kernel may use this to verify that the
  128          * symbols were loaded by this boot program.
  129          */
  130         if (magic == OMAGIC || magic == NMAGIC) {
  131                 if (flags & LOAD_HDR && maxp >= sizeof(*x))
  132                         BCOPY(x, maxp - sizeof(*x), sizeof(*x));
  133         }
  134         else {
  135                 if (flags & LOAD_HDR)
  136                         BCOPY(x, maxp, sizeof(*x));
  137                 if (flags & (LOAD_HDR|COUNT_HDR))
  138                         maxp += sizeof(*x);
  139         }
  140 
  141         /*
  142          * Read in the text segment.
  143          */
  144         if (flags & LOAD_TEXT) {
  145                 PROGRESS(("%ld", x->a_text));
  146 
  147                 if (READ(fd, maxp, x->a_text - sub) !=
  148                     (ssize_t)(x->a_text - sub)) {
  149                         WARN(("read text"));
  150                         return 1;
  151                 }
  152         } else {
  153                 if (lseek(fd, x->a_text - sub, SEEK_CUR) == -1) {
  154                         WARN(("seek text"));
  155                         return 1;
  156                 }
  157         }
  158         if (flags & (LOAD_TEXT|COUNT_TEXT))
  159                 maxp += x->a_text - sub;
  160 
  161         /*
  162          * Provide alignment if required
  163          */
  164         if (magic == ZMAGIC || magic == NMAGIC) {
  165                 int size = -(unsigned int)maxp & (AOUT_LDPGSZ - 1);
  166 
  167                 if (flags & LOAD_TEXTA) {
  168                         PROGRESS(("/%d", size));
  169                         BZERO(maxp, size);
  170                 }
  171 
  172                 if (flags & (LOAD_TEXTA|COUNT_TEXTA))
  173                         maxp += size;
  174         }
  175 
  176         /*
  177          * Read in the data segment.
  178          */
  179         if (flags & LOAD_DATA) {
  180                 PROGRESS(("+%ld", x->a_data));
  181 
  182                 if (READ(fd, maxp, x->a_data) != (ssize_t)x->a_data) {
  183                         WARN(("read data"));
  184                         return 1;
  185                 }
  186         }
  187         else {
  188                 if (lseek(fd, x->a_data, SEEK_CUR) == -1) {
  189                         WARN(("seek data"));
  190                         return 1;
  191                 }
  192         }
  193         if (flags & (LOAD_DATA|COUNT_DATA))
  194                 maxp += x->a_data;
  195 
  196         /*
  197          * Zero out the BSS section.
  198          * (Kernel doesn't care, but do it anyway.)
  199          */
  200         if (flags & LOAD_BSS) {
  201                 PROGRESS(("+%ld", x->a_bss));
  202 
  203                 BZERO(maxp, x->a_bss);
  204         }
  205 
  206         if (flags & (LOAD_BSS|COUNT_BSS))
  207                 maxp += x->a_bss;
  208 
  209         /*
  210          * Read in the symbol table and strings.
  211          * (Always set the symtab size word.)
  212          */
  213         if (flags & LOAD_SYM)
  214                 BCOPY(&x->a_syms, maxp, sizeof(x->a_syms));
  215 
  216         if (flags & (LOAD_SYM|COUNT_SYM)) {
  217                 maxp += sizeof(x->a_syms);
  218                 aoutp = maxp;
  219         }
  220 
  221         if (x->a_syms > 0) {
  222                 /* Symbol table and string table length word. */
  223 
  224                 if (flags & LOAD_SYM) {
  225                         PROGRESS(("+[%ld", x->a_syms));
  226 
  227                         if (READ(fd, maxp, x->a_syms) != (ssize_t)x->a_syms) {
  228                                 WARN(("read symbols"));
  229                                 return 1;
  230                         }
  231                 } else  {
  232                         if (lseek(fd, x->a_syms, SEEK_CUR) == -1) {
  233                                 WARN(("seek symbols"));
  234                                 return 1;
  235                         }
  236                 }
  237                 if (flags & (LOAD_SYM|COUNT_SYM))
  238                         maxp += x->a_syms;
  239 
  240                 if (read(fd, &cc, sizeof(cc)) != sizeof(cc)) {
  241                         WARN(("read string table"));
  242                         return 1;
  243                 }
  244 
  245                 if (flags & LOAD_SYM) {
  246                         BCOPY(&cc, maxp, sizeof(cc));
  247 
  248                         /* String table. Length word includes itself. */
  249 
  250                         PROGRESS(("+%d]", cc));
  251                 }
  252                 if (flags & (LOAD_SYM|COUNT_SYM))
  253                         maxp += sizeof(cc);
  254 
  255                 cc -= sizeof(int);
  256                 if (cc <= 0) {
  257                         WARN(("symbol table too short"));
  258                         return 1;
  259                 }
  260 
  261                 if (flags & LOAD_SYM) {
  262                         if (READ(fd, maxp, cc) != cc) {
  263                                 WARN(("read strings"));
  264                                 return 1;
  265                         }
  266                 } else {
  267                         if (lseek(fd, cc, SEEK_CUR) == -1) {
  268                                 WARN(("seek strings"));
  269                                 return 1;
  270                         }
  271                 }
  272                 if (flags & (LOAD_SYM|COUNT_SYM))
  273                         maxp += cc;
  274         }
  275 
  276         marks[MARK_START] = LOADADDR(minp);
  277         marks[MARK_ENTRY] = LOADADDR(entry);
  278         marks[MARK_NSYM] = x->a_syms;
  279         marks[MARK_SYM] = LOADADDR(aoutp);
  280         marks[MARK_END] = LOADADDR(maxp);
  281         return 0;
  282 }
  283 
  284 #endif /* BOOT_AOUT */
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FreeBSD/Linux Kernel Cross Reference sys/lib/libsa/loadfile_aout.c

FreeBSD/Linux Kernel Cross Reference
sys/lib/libsa/loadfile_aout.c
