1 /* $NetBSD: elf_flag.c,v 1.3 2016/02/20 02:43:42 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2006,2008-2009,2011 Joseph Koshy 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <libelf.h> 30 31 #include "_libelf.h" 32 33 __RCSID("$NetBSD: elf_flag.c,v 1.3 2016/02/20 02:43:42 christos Exp $"); 34 ELFTC_VCSID("Id: elf_flag.c 3174 2015-03-27 17:13:41Z emaste "); 35 36 unsigned int 37 elf_flagarhdr(Elf_Arhdr *a, Elf_Cmd c, unsigned int flags) 38 { 39 unsigned int r; 40 41 if (a == NULL) 42 return (0); 43 44 if ((c != ELF_C_SET && c != ELF_C_CLR) || 45 (flags & ~ELF_F_DIRTY) != 0) { 46 LIBELF_SET_ERROR(ARGUMENT, 0); 47 return (0); 48 } 49 50 if (c == ELF_C_SET) 51 r = a->ar_flags |= flags; 52 else 53 r = a->ar_flags &= ~flags; 54 55 return (r & LIBELF_F_API_MASK); 56 } 57 58 unsigned int 59 elf_flagdata(Elf_Data *d, Elf_Cmd c, unsigned int flags) 60 { 61 unsigned int r; 62 struct _Libelf_Data *ld; 63 64 if (d == NULL) 65 return (0); 66 67 if ((c != ELF_C_SET && c != ELF_C_CLR) || 68 (flags & ~ELF_F_DIRTY) != 0) { 69 LIBELF_SET_ERROR(ARGUMENT, 0); 70 return (0); 71 } 72 73 ld = (struct _Libelf_Data *) d; 74 75 if (c == ELF_C_SET) 76 r = ld->d_flags |= flags; 77 else 78 r = ld->d_flags &= ~flags; 79 80 return (r & LIBELF_F_API_MASK); 81 } 82 83 unsigned int 84 elf_flagehdr(Elf *e, Elf_Cmd c, unsigned int flags) 85 { 86 int ec; 87 void *ehdr; 88 89 if (e == NULL) 90 return (0); 91 92 if ((c != ELF_C_SET && c != ELF_C_CLR) || 93 (e->e_kind != ELF_K_ELF) || (flags & ~ELF_F_DIRTY) != 0 || 94 ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) { 95 LIBELF_SET_ERROR(ARGUMENT, 0); 96 return (0); 97 } 98 99 if (ec == ELFCLASS32) 100 ehdr = e->e_u.e_elf.e_ehdr.e_ehdr32; 101 else 102 ehdr = e->e_u.e_elf.e_ehdr.e_ehdr64; 103 104 if (ehdr == NULL) { 105 LIBELF_SET_ERROR(SEQUENCE, 0); 106 return (0); 107 } 108 109 return (elf_flagelf(e, c, flags)); 110 } 111 112 unsigned int 113 elf_flagelf(Elf *e, Elf_Cmd c, unsigned int flags) 114 { 115 unsigned int r; 116 117 if (e == NULL) 118 return (0); 119 120 if ((c != ELF_C_SET && c != ELF_C_CLR) || 121 (e->e_kind != ELF_K_ELF) || 122 (flags & ~(ELF_F_ARCHIVE | ELF_F_ARCHIVE_SYSV | 123 ELF_F_DIRTY | ELF_F_LAYOUT)) != 0) { 124 LIBELF_SET_ERROR(ARGUMENT, 0); 125 return (0); 126 } 127 128 if ((flags & ELF_F_ARCHIVE_SYSV) && (flags & ELF_F_ARCHIVE) == 0) { 129 LIBELF_SET_ERROR(ARGUMENT, 0); 130 return (0); 131 } 132 133 if ((flags & ELF_F_ARCHIVE) && e->e_cmd != ELF_C_WRITE) { 134 LIBELF_SET_ERROR(MODE, 0); 135 return (0); 136 } 137 138 if (c == ELF_C_SET) 139 r = e->e_flags |= flags; 140 else 141 r = e->e_flags &= ~flags; 142 return (r & LIBELF_F_API_MASK); 143 } 144 145 unsigned int 146 elf_flagphdr(Elf *e, Elf_Cmd c, unsigned int flags) 147 { 148 int ec; 149 void *phdr; 150 151 if (e == NULL) 152 return (0); 153 154 if ((c != ELF_C_SET && c != ELF_C_CLR) || 155 (e->e_kind != ELF_K_ELF) || (flags & ~ELF_F_DIRTY) != 0 || 156 ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) { 157 LIBELF_SET_ERROR(ARGUMENT, 0); 158 return (0); 159 } 160 161 if (ec == ELFCLASS32) 162 phdr = e->e_u.e_elf.e_phdr.e_phdr32; 163 else 164 phdr = e->e_u.e_elf.e_phdr.e_phdr64; 165 166 if (phdr == NULL) { 167 LIBELF_SET_ERROR(SEQUENCE, 0); 168 return (0); 169 } 170 171 return (elf_flagelf(e, c, flags)); 172 } 173 174 unsigned int 175 elf_flagscn(Elf_Scn *s, Elf_Cmd c, unsigned int flags) 176 { 177 unsigned int r; 178 179 if (s == NULL) 180 return (0); 181 182 if ((c != ELF_C_SET && c != ELF_C_CLR) || 183 (flags & ~ELF_F_DIRTY) != 0) { 184 LIBELF_SET_ERROR(ARGUMENT, 0); 185 return (0); 186 } 187 188 if (c == ELF_C_SET) 189 r = s->s_flags |= flags; 190 else 191 r = s->s_flags &= ~flags; 192 return (r & LIBELF_F_API_MASK); 193 } 194 195 unsigned int 196 elf_flagshdr(Elf_Scn *s, Elf_Cmd c, unsigned int flags) 197 { 198 return (elf_flagscn(s, c, flags)); 199 } 200