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_newscn(Elf * elf) 39 { 40 Elf_Scn * tl; 41 42 if (elf == 0) 43 return (0); 44 45 ELFWLOCK(elf) 46 /* 47 * if no sections yet, the file either isn't cooked 48 * or it truly is empty. Then allocate shdr[0] 49 */ 50 if ((elf->ed_hdscn == 0) && (_elf_cook(elf) != OK_YES)) { 51 ELFUNLOCK(elf) 52 return (0); 53 } 54 if (elf->ed_ehdr == 0) { 55 _elf_seterr(ESEQ_EHDR, 0); 56 ELFUNLOCK(elf) 57 return (0); 58 } 59 60 if (elf->ed_class == ELFCLASS32) { 61 Snode32 *s; 62 63 if (elf->ed_hdscn == 0) { 64 if ((s = _elf32_snode()) == 0) { 65 ELFUNLOCK(elf) 66 return (0); 67 } 68 NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*s)) 69 s->sb_scn.s_elf = elf; 70 elf->ed_hdscn = elf->ed_tlscn = &s->sb_scn; 71 s->sb_scn.s_uflags |= ELF_F_DIRTY; 72 } 73 if ((s = _elf32_snode()) == 0) { 74 ELFUNLOCK(elf) 75 return (0); 76 } 77 NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*s)) 78 tl = elf->ed_tlscn; 79 s->sb_scn.s_elf = elf; 80 s->sb_scn.s_index = tl->s_index + 1; 81 elf->ed_tlscn = tl->s_next = &s->sb_scn; 82 ((Elf32_Ehdr *)elf->ed_ehdr)->e_shnum 83 /* LINTED */ 84 = (Elf32_Half)(tl->s_index + 2); 85 s->sb_scn.s_uflags |= ELF_F_DIRTY; 86 tl = &s->sb_scn; 87 NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*s)) 88 ELFUNLOCK(elf) 89 return (tl); 90 } else if (elf->ed_class == ELFCLASS64) { 91 Snode64 *s; 92 93 if (elf->ed_hdscn == 0) { 94 if ((s = _elf64_snode()) == 0) { 95 ELFUNLOCK(elf) 96 return (0); 97 } 98 NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*s)) 99 s->sb_scn.s_elf = elf; 100 elf->ed_hdscn = elf->ed_tlscn = &s->sb_scn; 101 s->sb_scn.s_uflags |= ELF_F_DIRTY; 102 } 103 if ((s = _elf64_snode()) == 0) { 104 ELFUNLOCK(elf) 105 return (0); 106 } 107 NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*s)) 108 tl = elf->ed_tlscn; 109 s->sb_scn.s_elf = elf; 110 s->sb_scn.s_index = tl->s_index + 1; 111 elf->ed_tlscn = tl->s_next = &s->sb_scn; 112 ((Elf64_Ehdr *)elf->ed_ehdr)->e_shnum 113 /* LINTED */ 114 = (Elf64_Half)(tl->s_index + 2); 115 s->sb_scn.s_uflags |= ELF_F_DIRTY; 116 tl = &s->sb_scn; 117 NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*s)) 118 ELFUNLOCK(elf) 119 return (tl); 120 } else { 121 _elf_seterr(EREQ_CLASS, 0); 122 ELFUNLOCK(elf) 123 return (0); 124 } 125 } 126