1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* Copyright (c) 1988 AT&T */ 23 /* All Rights Reserved */ 24 25 26 /* 27 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 33 #if !defined(_ELF64) 34 #pragma weak elf32_newehdr = _elf32_newehdr 35 #endif 36 37 #include "syn.h" 38 #include <stdlib.h> 39 #include <errno.h> 40 #include "decl.h" 41 #include "msg.h" 42 43 /* 44 * This module is compiled twice, the second time having 45 * -D_ELF64 defined. The following set of macros, along 46 * with machelf.h, represent the differences between the 47 * two compilations. Be careful *not* to add any class- 48 * dependent code (anything that has elf32 or elf64 in the 49 * name) to this code without hiding it behind a switch- 50 * able macro like these. 51 */ 52 #if defined(_ELF64) 53 54 #define ELFCLASS ELFCLASS64 55 #define _elf_ehdr_init _elf64_ehdr_init 56 #define elf_newehdr elf64_newehdr 57 #define getehdr elf64_getehdr 58 59 #else /* else ELF32 */ 60 61 #define ELFCLASS ELFCLASS32 62 #define _elf_ehdr_init _elf32_ehdr_init 63 #define elf_newehdr _elf32_newehdr 64 #define getehdr elf32_getehdr 65 66 #endif /* ELF64 */ 67 68 69 Ehdr * 70 elf_newehdr(Elf * elf) 71 { 72 register 73 Ehdr *eh; 74 75 if (elf == 0) 76 return (0); 77 78 /* 79 * If reading file, return its hdr 80 */ 81 82 ELFWLOCK(elf) 83 if (elf->ed_myflags & EDF_READ) { 84 ELFUNLOCK(elf) 85 if ((eh = (Ehdr *)getehdr(elf)) != 0) { 86 ELFWLOCK(elf) 87 elf->ed_ehflags |= ELF_F_DIRTY; 88 ELFUNLOCK(elf) 89 } 90 return (eh); 91 } 92 93 /* 94 * Writing file 95 */ 96 97 if (elf->ed_class == ELFCLASSNONE) 98 elf->ed_class = ELFCLASS; 99 else if (elf->ed_class != ELFCLASS) { 100 _elf_seterr(EREQ_CLASS, 0); 101 ELFUNLOCK(elf) 102 return (0); 103 } 104 ELFUNLOCK(elf); 105 if ((eh = (Ehdr *)getehdr(elf)) != 0) { /* this cooks if necessary */ 106 ELFWLOCK(elf) 107 elf->ed_ehflags |= ELF_F_DIRTY; 108 ELFUNLOCK(elf) 109 return (eh); 110 } 111 ELFWLOCK(elf) 112 113 if ((eh = (Ehdr *)malloc(sizeof (Ehdr))) == 0) { 114 _elf_seterr(EMEM_EHDR, errno); 115 ELFUNLOCK(elf) 116 return (0); 117 } 118 *eh = _elf_ehdr_init; 119 elf->ed_myflags |= EDF_EHALLOC; 120 elf->ed_ehflags |= ELF_F_DIRTY; 121 elf->ed_ehdr = eh; 122 ELFUNLOCK(elf) 123 return (eh); 124 } 125