1 /* $NetBSD: gelf_move.c,v 1.3 2016/02/20 02:43:42 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2006,2008 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 #if HAVE_NBTOOL_CONFIG_H 30 # include "nbtool_config.h" 31 #endif 32 33 #include <sys/cdefs.h> 34 35 #include <assert.h> 36 #include <gelf.h> 37 #include <limits.h> 38 #include <stdint.h> 39 40 #include "_libelf.h" 41 42 __RCSID("$NetBSD: gelf_move.c,v 1.3 2016/02/20 02:43:42 christos Exp $"); 43 ELFTC_VCSID("Id: gelf_move.c 3177 2015-03-30 18:19:41Z emaste "); 44 45 GElf_Move * 46 gelf_getmove(Elf_Data *ed, int ndx, GElf_Move *dst) 47 { 48 int ec; 49 Elf *e; 50 size_t msz; 51 Elf_Scn *scn; 52 uint32_t sh_type; 53 Elf32_Move *move32; 54 Elf64_Move *move64; 55 struct _Libelf_Data *d; 56 57 d = (struct _Libelf_Data *) ed; 58 59 if (d == NULL || ndx < 0 || dst == NULL || 60 (scn = d->d_scn) == NULL || 61 (e = scn->s_elf) == NULL) { 62 LIBELF_SET_ERROR(ARGUMENT, 0); 63 return (NULL); 64 } 65 66 ec = e->e_class; 67 assert(ec == ELFCLASS32 || ec == ELFCLASS64); 68 69 if (ec == ELFCLASS32) 70 sh_type = scn->s_shdr.s_shdr32.sh_type; 71 else 72 sh_type = scn->s_shdr.s_shdr64.sh_type; 73 74 if (_libelf_xlate_shtype(sh_type) != ELF_T_MOVE) { 75 LIBELF_SET_ERROR(ARGUMENT, 0); 76 return (NULL); 77 } 78 79 msz = _libelf_msize(ELF_T_MOVE, ec, e->e_version); 80 81 assert(msz > 0); 82 assert(ndx >= 0); 83 84 if (msz * (size_t) ndx >= d->d_data.d_size) { 85 LIBELF_SET_ERROR(ARGUMENT, 0); 86 return (NULL); 87 } 88 89 if (ec == ELFCLASS32) { 90 91 move32 = (Elf32_Move *) d->d_data.d_buf + ndx; 92 93 dst->m_value = move32->m_value; 94 dst->m_info = (Elf64_Xword) move32->m_info; 95 dst->m_poffset = (Elf64_Xword) move32->m_poffset; 96 dst->m_repeat = move32->m_repeat; 97 dst->m_stride = move32->m_stride; 98 } else { 99 100 move64 = (Elf64_Move *) d->d_data.d_buf + ndx; 101 102 *dst = *move64; 103 } 104 105 return (dst); 106 } 107 108 int 109 gelf_update_move(Elf_Data *ed, int ndx, GElf_Move *gm) 110 { 111 int ec; 112 Elf *e; 113 size_t msz; 114 Elf_Scn *scn; 115 uint32_t sh_type; 116 Elf32_Move *move32; 117 Elf64_Move *move64; 118 struct _Libelf_Data *d; 119 120 d = (struct _Libelf_Data *) ed; 121 122 if (d == NULL || ndx < 0 || gm == NULL || 123 (scn = d->d_scn) == NULL || 124 (e = scn->s_elf) == NULL) { 125 LIBELF_SET_ERROR(ARGUMENT, 0); 126 return (0); 127 } 128 129 ec = e->e_class; 130 assert(ec == ELFCLASS32 || ec == ELFCLASS64); 131 132 if (ec == ELFCLASS32) 133 sh_type = scn->s_shdr.s_shdr32.sh_type; 134 else 135 sh_type = scn->s_shdr.s_shdr64.sh_type; 136 137 if (_libelf_xlate_shtype(sh_type) != ELF_T_MOVE) { 138 LIBELF_SET_ERROR(ARGUMENT, 0); 139 return (0); 140 } 141 142 msz = _libelf_msize(ELF_T_MOVE, ec, e->e_version); 143 144 assert(msz > 0); 145 assert(ndx >= 0); 146 147 if (msz * (size_t) ndx >= d->d_data.d_size) { 148 LIBELF_SET_ERROR(ARGUMENT, 0); 149 return (0); 150 } 151 152 if (ec == ELFCLASS32) { 153 move32 = (Elf32_Move *) d->d_data.d_buf + ndx; 154 155 move32->m_value = gm->m_value; 156 LIBELF_COPY_U32(move32, gm, m_info); 157 LIBELF_COPY_U32(move32, gm, m_poffset); 158 move32->m_repeat = gm->m_repeat; 159 move32->m_stride = gm->m_stride; 160 161 } else { 162 move64 = (Elf64_Move *) d->d_data.d_buf + ndx; 163 164 *move64 = *gm; 165 } 166 167 return (1); 168 } 169