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 * 36 elf_newscn(Elf * elf) 37 { 38 Elf_Scn * tl; 39 40 if (elf == 0) 41 return (0); 42 43 ELFWLOCK(elf) 44 /* 45 * if no sections yet, the file either isn't cooked 46 * or it truly is empty. Then allocate shdr[0] 47 */ 48 if ((elf->ed_hdscn == 0) && (_elf_cook(elf) != OK_YES)) { 49 ELFUNLOCK(elf) 50 return (0); 51 } 52 if (elf->ed_ehdr == 0) { 53 _elf_seterr(ESEQ_EHDR, 0); 54 ELFUNLOCK(elf) 55 return (0); 56 } 57 58 if (elf->ed_class == ELFCLASS32) { 59 Snode32 *s; 60 61 if (elf->ed_hdscn == 0) { 62 if ((s = _elf32_snode()) == 0) { 63 ELFUNLOCK(elf) 64 return (0); 65 } 66 s->sb_scn.s_elf = elf; 67 elf->ed_hdscn = elf->ed_tlscn = &s->sb_scn; 68 s->sb_scn.s_uflags |= ELF_F_DIRTY; 69 } 70 if ((s = _elf32_snode()) == 0) { 71 ELFUNLOCK(elf) 72 return (0); 73 } 74 tl = elf->ed_tlscn; 75 s->sb_scn.s_elf = elf; 76 s->sb_scn.s_index = tl->s_index + 1; 77 elf->ed_tlscn = tl->s_next = &s->sb_scn; 78 ((Elf32_Ehdr *)elf->ed_ehdr)->e_shnum 79 /* LINTED */ 80 = (Elf32_Half)(tl->s_index + 2); 81 s->sb_scn.s_uflags |= ELF_F_DIRTY; 82 tl = &s->sb_scn; 83 ELFUNLOCK(elf) 84 return (tl); 85 } else if (elf->ed_class == ELFCLASS64) { 86 Snode64 *s; 87 88 if (elf->ed_hdscn == 0) { 89 if ((s = _elf64_snode()) == 0) { 90 ELFUNLOCK(elf) 91 return (0); 92 } 93 s->sb_scn.s_elf = elf; 94 elf->ed_hdscn = elf->ed_tlscn = &s->sb_scn; 95 s->sb_scn.s_uflags |= ELF_F_DIRTY; 96 } 97 if ((s = _elf64_snode()) == 0) { 98 ELFUNLOCK(elf) 99 return (0); 100 } 101 tl = elf->ed_tlscn; 102 s->sb_scn.s_elf = elf; 103 s->sb_scn.s_index = tl->s_index + 1; 104 elf->ed_tlscn = tl->s_next = &s->sb_scn; 105 ((Elf64_Ehdr *)elf->ed_ehdr)->e_shnum 106 /* LINTED */ 107 = (Elf64_Half)(tl->s_index + 2); 108 s->sb_scn.s_uflags |= ELF_F_DIRTY; 109 tl = &s->sb_scn; 110 ELFUNLOCK(elf) 111 return (tl); 112 } else { 113 _elf_seterr(EREQ_CLASS, 0); 114 ELFUNLOCK(elf) 115 return (0); 116 } 117 } 118