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 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include "libelf.h" 33 #include "decl.h" 34 #include "msg.h" 35 36 37 Elf_Scn * 38 elf_getscn(Elf * elf, size_t index) 39 { 40 Elf_Scn * s; 41 Elf_Scn * prev_s; 42 size_t j = index; 43 size_t tabsz; 44 45 if (elf == 0) 46 return (0); 47 48 ELFRLOCK(elf) 49 tabsz = elf->ed_scntabsz; 50 if (elf->ed_hdscn == 0) { 51 ELFUNLOCK(elf) 52 ELFWLOCK(elf) 53 if ((elf->ed_hdscn == 0) && (_elf_cook(elf) != OK_YES)) { 54 ELFUNLOCK(elf); 55 return (0); 56 } 57 ELFUNLOCK(elf); 58 ELFRLOCK(elf) 59 } 60 /* 61 * If the section in question is part of a table allocated 62 * from within _elf_prescn() then we can index straight 63 * to it. 64 */ 65 if (index < tabsz) { 66 s = &elf->ed_hdscn[index]; 67 ELFUNLOCK(elf); 68 return (s); 69 } 70 71 #ifndef __lock_lint 72 if (tabsz) 73 s = &elf->ed_hdscn[tabsz - 1]; 74 else 75 s = elf->ed_hdscn; 76 77 for (prev_s = 0; s != 0; prev_s = s, s = s->s_next) { 78 if (prev_s) { 79 SCNUNLOCK(prev_s) 80 } 81 SCNLOCK(s) 82 if (j == 0) { 83 if (s->s_index == index) { 84 SCNUNLOCK(s) 85 ELFUNLOCK(elf); 86 return (s); 87 } 88 _elf_seterr(EBUG_SCNLIST, 0); 89 SCNUNLOCK(s) 90 ELFUNLOCK(elf) 91 return (0); 92 } 93 --j; 94 } 95 if (prev_s) { 96 SCNUNLOCK(prev_s) 97 } 98 #endif 99 _elf_seterr(EREQ_NDX, 0); 100 ELFUNLOCK(elf); 101 return (0); 102 } 103