sys/arch/ia64/stand/common/load_elf64.c

   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@freebsd.org>
   5  * Copyright (c) 1998 Peter Wemm <peter@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 /* __FBSDID("$FreeBSD: src/sys/boot/common/load_elf.c,v 1.30.2.1 2004/09/03 19:25:40 iedowse Exp $"); */
  32
  33 #include <sys/param.h>
  34 #include <sys/exec.h>
  35
  36 #include <lib/libsa/stand.h>
  37 #include <lib/libsa/loadfile.h>
  38
  39 #include "bootstrap.h"
  40
  41 #ifdef BOOT_ELF64
  42
  43 /*
  44  * Attempt to load the file (file) as an ELF module.  It will be stored at
  45  * (dest), and a pointer to a module structure describing the loaded object
  46  * will be saved in (result).
  47  */
  48 int
  49 elf64_loadfile(char *filename, u_int64_t dest, struct preloaded_file **result)
  50 {
  51     struct preloaded_file       *fp;
  52     u_long                      *marks;
  53     int                         err;
  54     u_int                       pad;
  55     ssize_t                     bytes_read;
  56     int                         fd;
  57
  58     /*
  59      * Open the image, read and validate the ELF header
  60      */
  61     if (filename == NULL)       /* can't handle nameless */
  62         return(EFTYPE);
  63
  64     fp = file_alloc();
  65     marks = fp->marks;
  66
  67     if (fp == NULL) {
  68             printf("elf64_loadfile: cannot allocate module info\n");
  69             err = EPERM;
  70             goto out;
  71     }
  72
  73     fp->f_name = strdup(filename);
  74     fp->f_type = strdup(ELF64_KERNELTYPE);
  75
  76     marks[MARK_START] = dest;
  77
  78     if ((fd = loadfile(filename, marks, LOAD_KERNEL)) == -1)
  79             goto oerr;
  80     close(fd);
  81
  82     dest = marks[MARK_ENTRY];
  83
  84     printf("%s entry at 0x%lx\n", filename, (uintmax_t)dest);
  85
  86     fp->f_size = marks[MARK_END] - marks[MARK_START];
  87     fp->f_addr = marks[MARK_START];
  88
  89     if (fp->f_size == 0 || fp->f_addr == 0)
  90         goto ioerr;
  91
  92     /* Load OK, return module pointer */
  93     *result = fp;
  94     err = 0;
  95     goto out;
  96
  97  ioerr:
  98     err = EIO;
  99  oerr:
 100     file_discard(fp);
 101  out:
 102     return(err);
 103 }
 104
 105 #endif /*BOOT_ELF64*/