sys/boot/pc32/libi386/elf32_freebsd.c

   1 /*-
   2  * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
   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 PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/boot/i386/libi386/elf32_freebsd.c,v 1.13 2003/08/25 23:28:31 obrien Exp $
  27  * $DragonFly: src/sys/boot/pc32/libi386/elf32_freebsd.c,v 1.1 2003/11/10 06:08:36 dillon Exp $
  28  */
  29
  30 #include <sys/param.h>
  31 #include <sys/exec.h>
  32 #include <sys/linker.h>
  33 #include <string.h>
  34 #include <machine/bootinfo.h>
  35 #include <machine/elf.h>
  36 #include <stand.h>
  37
  38 #include "bootstrap.h"
  39 #include "libi386.h"
  40 #include "btxv86.h"
  41
  42 static int      elf32_exec(struct preloaded_file *amp);
  43 static int      elf32_obj_exec(struct preloaded_file *amp);
  44
  45 struct file_format i386_elf = { elf32_loadfile, elf32_exec };
  46 struct file_format i386_elf_obj = { elf32_obj_loadfile, elf32_obj_exec };
  47
  48 /*
  49  * There is an ELF kernel and one or more ELF modules loaded.
  50  * We wish to start executing the kernel image, so make such
  51  * preparations as are required, and do so.
  52  */
  53 static int
  54 elf32_exec(struct preloaded_file *fp)
  55 {
  56     struct file_metadata        *md;
  57     Elf_Ehdr                    *ehdr;
  58     vm_offset_t                 entry, bootinfop, modulep, kernend;
  59     int                         boothowto, err, bootdev;
  60
  61     if ((md = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
  62         return(EFTYPE);                 /* XXX actually EFUCKUP */
  63     ehdr = (Elf_Ehdr *)&(md->md_data);
  64
  65     err = bi_load32(fp->f_args, &boothowto, &bootdev, &bootinfop, &modulep, &kernend);
  66     if (err != 0)
  67         return(err);
  68     entry = ehdr->e_entry & 0xffffff;
  69
  70 #ifdef DEBUG
  71     printf("Start @ 0x%lx ...\n", entry);
  72 #endif
  73
  74     dev_cleanup();
  75     __exec((void *)entry, boothowto, bootdev, 0, 0, 0, bootinfop, modulep, kernend);
  76
  77     panic("exec returned");
  78 }
  79
  80 static int
  81 elf32_obj_exec(struct preloaded_file *fp)
  82 {
  83         return (EFTYPE);
  84 }