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 * Copyright (c) 1998 by Sun Microsystems, Inc. 27 * All rights reserved. 28 */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.10 */ 31 32 #pragma weak elf_getscn = _elf_getscn 33 34 35 #include "syn.h" 36 #include "libelf.h" 37 #include "decl.h" 38 #include "msg.h" 39 40 41 Elf_Scn * 42 elf_getscn(Elf * elf, size_t index) 43 { 44 Elf_Scn * s; 45 Elf_Scn * prev_s; 46 size_t j = index; 47 size_t tabsz; 48 49 if (elf == 0) 50 return (0); 51 52 ELFRLOCK(elf) 53 tabsz = elf->ed_scntabsz; 54 if (elf->ed_hdscn == 0) { 55 ELFUNLOCK(elf) 56 ELFWLOCK(elf) 57 if ((elf->ed_hdscn == 0) && (_elf_cook(elf) != OK_YES)) { 58 ELFUNLOCK(elf); 59 return (0); 60 } 61 ELFUNLOCK(elf); 62 ELFRLOCK(elf) 63 } 64 /* 65 * If the section in question is part of a table allocated 66 * from within _elf_prescn() then we can index straight 67 * to it. 68 */ 69 if (index < tabsz) { 70 s = &elf->ed_hdscn[index]; 71 ELFUNLOCK(elf); 72 return (s); 73 } 74 75 #ifndef __lock_lint 76 if (tabsz) 77 s = &elf->ed_hdscn[tabsz - 1]; 78 else 79 s = elf->ed_hdscn; 80 81 for (prev_s = 0; s != 0; prev_s = s, s = s->s_next) { 82 if (prev_s) { 83 SCNUNLOCK(prev_s) 84 } 85 SCNLOCK(s) 86 if (j == 0) { 87 if (s->s_index == index) { 88 SCNUNLOCK(s) 89 ELFUNLOCK(elf); 90 return (s); 91 } 92 _elf_seterr(EBUG_SCNLIST, 0); 93 SCNUNLOCK(s) 94 ELFUNLOCK(elf) 95 return (0); 96 } 97 --j; 98 } 99 if (prev_s) { 100 SCNUNLOCK(prev_s) 101 } 102 #endif 103 _elf_seterr(EREQ_NDX, 0); 104 ELFUNLOCK(elf); 105 return (0); 106 } 107