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load_elf64.c revision 1.1 
      1 /*	$NetBSD: load_elf64.c,v 1.1 2006/04/07 14:21:29 cherry Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 Michael Smith <msmith (at) freebsd.org>
      5  * Copyright (c) 1998 Peter Wemm <peter (at) freebsd.org>
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #include <sys/cdefs.h>
     31 
     32 #include <sys/param.h>
     33 #include <sys/exec.h>
     34 
     35 #include <lib/libsa/stand.h>
     36 #include <lib/libsa/loadfile.h>
     37 
     38 #include "bootstrap.h"
     39 
     40 #ifdef BOOT_ELF64
     41 
     42 /*
     43  * Attempt to load the file (file) as an ELF module.  It will be stored at
     44  * (dest), and a pointer to a module structure describing the loaded object
     45  * will be saved in (result).
     46  */
     47 int
     48 elf64_loadfile(char *filename, u_int64_t dest, struct preloaded_file **result)
     49 {
     50     struct preloaded_file	*fp;
     51     u_long                      *marks;
     52     int				err;
     53     u_int			pad;
     54     ssize_t			bytes_read;
     55     int                         fd;
     56 
     57     /*
     58      * Open the image, read and validate the ELF header
     59      */
     60     if (filename == NULL)	/* can't handle nameless */
     61 	return(EFTYPE);
     62 
     63     fp = file_alloc();
     64     marks = fp->marks;
     65 
     66     if (fp == NULL) {
     67 	    printf("elf64_loadfile: cannot allocate module info\n");
     68 	    err = EPERM;
     69 	    goto out;
     70     }
     71 
     72     fp->f_name = strdup(filename);
     73     fp->f_type = strdup(ELF64_KERNELTYPE);
     74 
     75     marks[MARK_START] = dest;
     76 
     77     if ((fd = loadfile(filename, marks, LOAD_KERNEL)) == -1)
     78 	    goto oerr;
     79     close(fd);
     80 
     81     dest = marks[MARK_ENTRY];
     82 
     83     printf("%s entry at 0x%lx\n", filename, (uintmax_t)dest);
     84 
     85     fp->f_size = marks[MARK_END] - marks[MARK_START];
     86     fp->f_addr = marks[MARK_START];
     87 
     88     if (fp->f_size == 0 || fp->f_addr == 0)
     89 	goto ioerr;
     90 
     91     /* Load OK, return module pointer */
     92     *result = fp;
     93     err = 0;
     94     goto out;
     95 
     96  ioerr:
     97     err = EIO;
     98  oerr:
     99     file_discard(fp);
    100  out:
    101     return(err);
    102 }
    103 
    104 #endif /*BOOT_ELF64*/
    105