usr.sbin/kgzip/kgzld.c

   1 /*
   2  * Copyright (c) 1999 Global Technology Associates, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
  18  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
  19  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  20  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  21  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  22  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  23  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  24  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/usr.sbin/kgzip/kgzld.c,v 1.2.2.1 2001/07/19 04:37:24 kris Exp $
  27  * $DragonFly: src/usr.sbin/kgzip/kgzld.c,v 1.2 2003/06/17 06:29:55 dillon Exp $
  28  */
  29
  30 #include <sys/types.h>
  31 #include <sys/wait.h>
  32
  33 #include <err.h>
  34 #include <fcntl.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <unistd.h>
  39
  40 #include "aouthdr.h"
  41 #include "elfhdr.h"
  42 #include "kgzip.h"
  43
  44 #define align(x, y) (((x) + (y) - 1) & ~((y) - 1))
  45
  46 /*
  47  * Link KGZ file and loader.
  48  */
  49 void
  50 kgzld(struct kgz_hdr * kh, const char *f1, const char *f2)
  51 {
  52     char addr[16];
  53     struct iodesc idi;
  54     pid_t pid;
  55     size_t n;
  56     int status;
  57
  58     if (strcmp(kh->ident, "KGZ")) {
  59         if ((idi.fd = open(idi.fname = f1, O_RDONLY)) == -1)
  60             err(1, "%s", idi.fname);
  61         if (!format) {
  62             union {
  63                 struct exec ex;
  64                 Elf32_Ehdr ee;
  65             } hdr;
  66             n = xread(&idi, &hdr, sizeof(hdr), 0);
  67             if (n >= sizeof(hdr.ee) && IS_ELF(hdr.ee))
  68                 format = F_ELF;
  69             else if (n >= sizeof(hdr.ex) &&
  70                      N_GETMAGIC(hdr.ex) == OMAGIC)
  71                 format = F_AOUT;
  72             if (!format)
  73                 errx(1, "%s: Format not supported", idi.fname);
  74         }
  75         n = xread(&idi, kh, sizeof(*kh),
  76                   format == F_AOUT ? sizeof(struct kgz_aouthdr0)
  77                                    : sizeof(struct kgz_elfhdr));
  78         xclose(&idi);
  79         if (n != sizeof(*kh) || strcmp(kh->ident, "KGZ"))
  80             errx(1, "%s: Invalid format", idi.fname);
  81     }
  82     sprintf(addr, "%#x", align(kh->dload + kh->dsize, 0x1000));
  83     switch (pid = fork()) {
  84     case -1:
  85         err(1, NULL);
  86     case 0:
  87         if (format == F_AOUT)
  88             execlp("ld", "ld", "-aout", "-Z", "-T", addr, "-o", f2,
  89                    loader, f1, NULL);
  90         else
  91             execlp("ld", "ld", "-Ttext", addr, "-o", f2, loader, f1,
  92                    NULL);
  93         warn(NULL);
  94         _exit(1);
  95     default:
  96         if ((pid = waitpid(pid, &status, 0)) == -1)
  97             err(1, NULL);
  98         if (WIFSIGNALED(status) || WEXITSTATUS(status))
  99             exit(1);
 100     }
 101 }