elf32_freebsd.c revision 39902
139833Speter/*- 239833Speter * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 339833Speter * All rights reserved. 439833Speter * 539833Speter * Redistribution and use in source and binary forms, with or without 639833Speter * modification, are permitted provided that the following conditions 739833Speter * are met: 839833Speter * 1. Redistributions of source code must retain the above copyright 939833Speter * notice, this list of conditions and the following disclaimer. 1039833Speter * 2. Redistributions in binary form must reproduce the above copyright 1139833Speter * notice, this list of conditions and the following disclaimer in the 1239833Speter * documentation and/or other materials provided with the distribution. 1339833Speter * 1439833Speter * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1539833Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1639833Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1739833Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1839833Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1939833Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2039833Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2139833Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2239833Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2339833Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2439833Speter * SUCH DAMAGE. 2539833Speter * 2639902Smsmith * $Id: elf_freebsd.c,v 1.2 1998/10/02 08:04:56 peter Exp $ 2739833Speter */ 2839833Speter 2939833Speter#include <sys/param.h> 3039833Speter#include <sys/exec.h> 3139833Speter#include <sys/reboot.h> 3239833Speter#include <sys/linker.h> 3339833Speter#include <string.h> 3439833Speter#include <machine/bootinfo.h> 3539833Speter#include <machine/elf.h> 3639833Speter#include <stand.h> 3739833Speter 3839833Speter#include "bootstrap.h" 3939833Speter#include "libi386.h" 4039833Speter#include "btxv86.h" 4139833Speter 4239833Speterstatic int elf_exec(struct loaded_module *amp); 4339833Speter 4439833Speterstruct module_format i386_elf = { elf_loadmodule, elf_exec }; 4539833Speter 4639833Speterstatic struct bootinfo bi; 4739833Speter 4839833Speter/* 4939833Speter * There is an a.out kernel and one or more a.out modules loaded. 5039833Speter * We wish to start executing the kernel image, so make such 5139833Speter * preparations as are required, and do so. 5239833Speter */ 5339833Speterstatic int 5439833Speterelf_exec(struct loaded_module *mp) 5539833Speter{ 5639833Speter struct module_metadata *md; 5739833Speter Elf_Ehdr *ehdr; 5839902Smsmith vm_offset_t entry, bootinfop; 5939902Smsmith int boothowto, err, bootdev; 6039902Smsmith struct bootinfo *bi; 6139902Smsmith vm_offset_t ssym, esym; 6239833Speter 6339833Speter if ((md = mod_findmetadata(mp, MODINFOMD_ELFHDR)) == NULL) 6439833Speter return(EFTYPE); /* XXX actually EFUCKUP */ 6539833Speter ehdr = (Elf_Ehdr *)&(md->md_data); 6639833Speter 6739902Smsmith /* XXX allow override? */ 6839902Smsmith setenv("kernelname", mp->m_name, 1); 6939833Speter 7039902Smsmith if ((err = bi_load(mp->m_args, &boothowto, &bootdev, &bootinfop)) != 0) 7139902Smsmith return(err); 7239902Smsmith entry = ehdr->e_entry & 0xffffff; 7339902Smsmith 7439887Speter if ((md = mod_findmetadata(mp, MODINFOMD_ELFSSYM)) != NULL) 7539887Speter ssym = *((vm_offset_t *)&(md->md_data)); 7639887Speter if ((md = mod_findmetadata(mp, MODINFOMD_ELFESYM)) != NULL) 7739887Speter esym = *((vm_offset_t *)&(md->md_data)); 7839887Speter if (ssym == 0 || esym == 0) 7939887Speter ssym = esym = 0; /* sanity */ 8039887Speter 8139902Smsmith bi = (struct bootinfo *)PTOV(bootinfop); 8239902Smsmith bi->bi_symtab = ssym; 8339902Smsmith bi->bi_esymtab = esym; 8439833Speter 8539833Speter 8639833Speter#ifdef DEBUG 8739833Speter printf("Start @ 0x%lx ...\n", entry); 8839833Speter#endif 8939833Speter 9039902Smsmith __exec((void *)entry, boothowto, bootdev, 0, 0, 0, bootinfop); 9139833Speter 9239833Speter panic("exec returned"); 9339833Speter} 94