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 #include "libelf.h" 31 #include "decl.h" 32 #include "msg.h" 33 34 35 Elf_Scn * elf_getscn(Elf * elf,size_t index)36elf_getscn(Elf * elf, size_t index) 37 { 38 Elf_Scn * s; 39 Elf_Scn * prev_s; 40 size_t j = index; 41 size_t tabsz; 42 43 if (elf == 0) 44 return (0); 45 46 ELFRLOCK(elf) 47 tabsz = elf->ed_scntabsz; 48 if (elf->ed_hdscn == 0) { 49 ELFUNLOCK(elf) 50 ELFWLOCK(elf) 51 if ((elf->ed_hdscn == 0) && (_elf_cook(elf) != OK_YES)) { 52 ELFUNLOCK(elf); 53 return (0); 54 } 55 ELFUNLOCK(elf); 56 ELFRLOCK(elf) 57 } 58 /* 59 * If the section in question is part of a table allocated 60 * from within _elf_prescn() then we can index straight 61 * to it. 62 */ 63 if (index < tabsz) { 64 s = &elf->ed_hdscn[index]; 65 ELFUNLOCK(elf); 66 return (s); 67 } 68 69 if (tabsz) 70 s = &elf->ed_hdscn[tabsz - 1]; 71 else 72 s = elf->ed_hdscn; 73 74 for (prev_s = 0; s != 0; prev_s = s, s = s->s_next) { 75 if (prev_s) { 76 SCNUNLOCK(prev_s) 77 } 78 SCNLOCK(s) 79 if (j == 0) { 80 if (s->s_index == index) { 81 SCNUNLOCK(s) 82 ELFUNLOCK(elf); 83 return (s); 84 } 85 _elf_seterr(EBUG_SCNLIST, 0); 86 SCNUNLOCK(s) 87 ELFUNLOCK(elf) 88 return (0); 89 } 90 --j; 91 } 92 if (prev_s) { 93 SCNUNLOCK(prev_s) 94 } 95 96 _elf_seterr(EREQ_NDX, 0); 97 ELFUNLOCK(elf); 98 return (0); 99 } 100