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exec_elf32.c revision 1.1 
      1 /*	$NetBSD: exec_elf32.c,v 1.1 1997/01/22 23:57:20 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997 Christopher G. Demetriou.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *      This product includes software developed by Christopher G. Demetriou
     17  *	for the NetBSD Project.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef lint
     34 static char *e32rcsid = "$NetBSD: exec_elf32.c,v 1.1 1997/01/22 23:57:20 cgd Exp $";
     35 #endif /* not lint */
     36 
     37 #ifndef ELFSIZE
     38 #define ELFSIZE         32
     39 #endif
     40 
     41 #include <sys/types.h>
     42 #include <sys/stat.h>
     43 #include <stdio.h>
     44 #include <string.h>
     45 #include "extern.h"
     46 
     47 #if (defined(NLIST_ELF32) && (ELFSIZE == 32)) || \
     48     (defined(NLIST_ELF64) && (ELFSIZE == 64))
     49 
     50 #include <sys/exec_elf.h>
     51 
     52 #define CONCAT(x,y)     __CONCAT(x,y)
     53 #define ELFNAME(x)      CONCAT(elf,CONCAT(ELFSIZE,CONCAT(_,x)))
     54 #define ELFNAME2(x,y)   CONCAT(x,CONCAT(_elf,CONCAT(ELFSIZE,CONCAT(_,y))))
     55 #define ELFNAMEEND(x)   CONCAT(x,CONCAT(_elf,ELFSIZE))
     56 #define ELFDEFNNAME(x)  CONCAT(ELF,CONCAT(ELFSIZE,CONCAT(_,x)))
     57 
     58 int
     59 ELFNAMEEND(check)(int fd, const char *filename)
     60 {
     61 	Elf_Ehdr eh;
     62 	struct stat sb;
     63 
     64 	/*
     65 	 * Check the header to maek sure it's an ELF file (of the
     66 	 * appropriate size).
     67 	 */
     68 	if (fstat(fd, &sb) == -1)
     69 		return 0;
     70 	if (sb.st_size < sizeof eh)
     71 		return 0;
     72 	if (read(fd, &eh, sizeof eh) != sizeof eh)
     73 		return 0;
     74 
     75 	if (memcmp(eh.e_ident, Elf_e_ident, Elf_e_siz))
     76                 return 0;
     77 
     78         switch (eh.e_machine) {
     79         ELFDEFNNAME(MACHDEP_ID_CASES)
     80 
     81         default:
     82                 return 0;
     83         }
     84 
     85 	return 1;
     86 }
     87 
     88 int
     89 ELFNAMEEND(hide)(int fd, const char *filename)
     90 {
     91 
     92 	fprintf(stderr, "%s: ELF%d executables not currently supported\n",
     93 		filename, ELFSIZE);
     94 	return 1;
     95 }
     96 
     97 #endif /* include this size of ELF */
     98