1 /* $NetBSD: load_elf64.c,v 1.2 2006/04/22 07:58:53 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*/ 106