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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 /* Copyright (c) 1988 AT&T */ 27 /* All Rights Reserved */ 28 29 #include "libelf.h" 30 #include "decl.h" 31 #include "msg.h" 32 33 size_t 34 elf_rand(Elf * elf, size_t off) 35 { 36 if (elf == 0) 37 return (0); 38 ELFWLOCK(elf) 39 if (elf->ed_kind != ELF_K_AR) { 40 _elf_seterr(EREQ_AR, 0); 41 ELFUNLOCK(elf) 42 return (0); 43 } 44 if ((off == 0) || (elf->ed_fsz < off)) { 45 _elf_seterr(EREQ_RAND, 0); 46 ELFUNLOCK(elf) 47 return (0); 48 } 49 elf->ed_nextoff = off; 50 ELFUNLOCK(elf) 51 return (off); 52 } 53 54 /* 55 * Private function used to obtain the current value of the next 56 * offset field for an archive header. Returns 0 for error, and 57 * the offset otherwise. 58 */ 59 size_t 60 _elf_getnextoff(Elf *elf) 61 { 62 size_t off; 63 64 if (elf == NULL) 65 return (0); 66 ELFWLOCK(elf) 67 if (elf->ed_kind != ELF_K_AR) { 68 _elf_seterr(EREQ_AR, 0); 69 ELFUNLOCK(elf) 70 return (0); 71 } 72 off = elf->ed_nextoff; 73 ELFUNLOCK(elf) 74 return (off); 75 76 } 77