elf32_freebsd.c revision 64187
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: head/sys/boot/i386/libi386/elf32_freebsd.c 64187 2000-08-03 09:14:02Z jhb $ 27 */ 28 29#include <sys/param.h> 30#include <sys/exec.h> 31#include <sys/reboot.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 42static int elf_exec(struct preloaded_file *amp); 43 44struct file_format i386_elf = { elf_loadfile, elf_exec }; 45 46/* 47 * There is an a.out kernel and one or more a.out modules loaded. 48 * We wish to start executing the kernel image, so make such 49 * preparations as are required, and do so. 50 */ 51static int 52elf_exec(struct preloaded_file *fp) 53{ 54 struct file_metadata *md; 55 Elf_Ehdr *ehdr; 56 vm_offset_t entry, bootinfop; 57 int boothowto, err, bootdev; 58 struct bootinfo *bi; 59 vm_offset_t ssym, esym; 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 if ((err = bi_load(fp->f_args, &boothowto, &bootdev, &bootinfop)) != 0) 66 return(err); 67 entry = ehdr->e_entry & 0xffffff; 68 69 ssym = esym = 0; 70 if ((md = file_findmetadata(fp, MODINFOMD_SSYM)) != NULL) 71 ssym = *((vm_offset_t *)&(md->md_data)); 72 if ((md = file_findmetadata(fp, MODINFOMD_ESYM)) != NULL) 73 esym = *((vm_offset_t *)&(md->md_data)); 74 if (ssym == 0 || esym == 0) 75 ssym = esym = 0; /* sanity */ 76 bi = (struct bootinfo *)PTOV(bootinfop); 77 bi->bi_symtab = ssym; /* XXX this is only the primary kernel symtab */ 78 bi->bi_esymtab = esym; 79 80 81#ifdef DEBUG 82 printf("Start @ 0x%lx ...\n", entry); 83#endif 84 85 dev_cleanup(); 86 __exec((void *)entry, boothowto, bootdev, 0, 0, 0, bootinfop); 87 88 panic("exec returned"); 89} 90