gelf_rela.c revision 1.2.8.2
1 1.2.8.2 tls /* $NetBSD: gelf_rela.c,v 1.2.8.2 2014/08/19 23:46:45 tls Exp $ */ 2 1.2.8.2 tls 3 1.2.8.2 tls /*- 4 1.2.8.2 tls * Copyright (c) 2006,2008 Joseph Koshy 5 1.2.8.2 tls * All rights reserved. 6 1.2.8.2 tls * 7 1.2.8.2 tls * Redistribution and use in source and binary forms, with or without 8 1.2.8.2 tls * modification, are permitted provided that the following conditions 9 1.2.8.2 tls * are met: 10 1.2.8.2 tls * 1. Redistributions of source code must retain the above copyright 11 1.2.8.2 tls * notice, this list of conditions and the following disclaimer. 12 1.2.8.2 tls * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.8.2 tls * notice, this list of conditions and the following disclaimer in the 14 1.2.8.2 tls * documentation and/or other materials provided with the distribution. 15 1.2.8.2 tls * 16 1.2.8.2 tls * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.2.8.2 tls * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.2.8.2 tls * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.2.8.2 tls * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.2.8.2 tls * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.2.8.2 tls * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.2.8.2 tls * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.2.8.2 tls * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.2.8.2 tls * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.8.2 tls * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.8.2 tls * SUCH DAMAGE. 27 1.2.8.2 tls */ 28 1.2.8.2 tls 29 1.2.8.2 tls #if HAVE_NBTOOL_CONFIG_H 30 1.2.8.2 tls # include "nbtool_config.h" 31 1.2.8.2 tls #endif 32 1.2.8.2 tls 33 1.2.8.2 tls #include <sys/cdefs.h> 34 1.2.8.2 tls 35 1.2.8.2 tls #include <assert.h> 36 1.2.8.2 tls #include <gelf.h> 37 1.2.8.2 tls #include <limits.h> 38 1.2.8.2 tls 39 1.2.8.2 tls #include "_libelf.h" 40 1.2.8.2 tls 41 1.2.8.2 tls __RCSID("$NetBSD: gelf_rela.c,v 1.2.8.2 2014/08/19 23:46:45 tls Exp $"); 42 1.2.8.2 tls ELFTC_VCSID("Id: gelf_rela.c 2272 2011-12-03 17:07:31Z jkoshy "); 43 1.2.8.2 tls 44 1.2.8.2 tls GElf_Rela * 45 1.2.8.2 tls gelf_getrela(Elf_Data *ed, int ndx, GElf_Rela *dst) 46 1.2.8.2 tls { 47 1.2.8.2 tls int ec; 48 1.2.8.2 tls Elf *e; 49 1.2.8.2 tls size_t msz; 50 1.2.8.2 tls Elf_Scn *scn; 51 1.2.8.2 tls uint32_t sh_type; 52 1.2.8.2 tls Elf32_Rela *rela32; 53 1.2.8.2 tls Elf64_Rela *rela64; 54 1.2.8.2 tls struct _Libelf_Data *d; 55 1.2.8.2 tls 56 1.2.8.2 tls d = (struct _Libelf_Data *) ed; 57 1.2.8.2 tls 58 1.2.8.2 tls if (d == NULL || ndx < 0 || dst == NULL || 59 1.2.8.2 tls (scn = d->d_scn) == NULL || 60 1.2.8.2 tls (e = scn->s_elf) == NULL) { 61 1.2.8.2 tls LIBELF_SET_ERROR(ARGUMENT, 0); 62 1.2.8.2 tls return (NULL); 63 1.2.8.2 tls } 64 1.2.8.2 tls 65 1.2.8.2 tls ec = e->e_class; 66 1.2.8.2 tls assert(ec == ELFCLASS32 || ec == ELFCLASS64); 67 1.2.8.2 tls 68 1.2.8.2 tls if (ec == ELFCLASS32) 69 1.2.8.2 tls sh_type = scn->s_shdr.s_shdr32.sh_type; 70 1.2.8.2 tls else 71 1.2.8.2 tls sh_type = scn->s_shdr.s_shdr64.sh_type; 72 1.2.8.2 tls 73 1.2.8.2 tls if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) { 74 1.2.8.2 tls LIBELF_SET_ERROR(ARGUMENT, 0); 75 1.2.8.2 tls return (NULL); 76 1.2.8.2 tls } 77 1.2.8.2 tls 78 1.2.8.2 tls msz = _libelf_msize(ELF_T_RELA, ec, e->e_version); 79 1.2.8.2 tls 80 1.2.8.2 tls assert(msz > 0); 81 1.2.8.2 tls 82 1.2.8.2 tls if (msz * ndx >= d->d_data.d_size) { 83 1.2.8.2 tls LIBELF_SET_ERROR(ARGUMENT, 0); 84 1.2.8.2 tls return (NULL); 85 1.2.8.2 tls } 86 1.2.8.2 tls 87 1.2.8.2 tls if (ec == ELFCLASS32) { 88 1.2.8.2 tls rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx; 89 1.2.8.2 tls 90 1.2.8.2 tls dst->r_offset = (Elf64_Addr) rela32->r_offset; 91 1.2.8.2 tls dst->r_info = ELF64_R_INFO( 92 1.2.8.2 tls (Elf64_Xword) ELF32_R_SYM(rela32->r_info), 93 1.2.8.2 tls ELF32_R_TYPE(rela32->r_info)); 94 1.2.8.2 tls dst->r_addend = (Elf64_Sxword) rela32->r_addend; 95 1.2.8.2 tls 96 1.2.8.2 tls } else { 97 1.2.8.2 tls 98 1.2.8.2 tls rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx; 99 1.2.8.2 tls 100 1.2.8.2 tls *dst = *rela64; 101 1.2.8.2 tls } 102 1.2.8.2 tls 103 1.2.8.2 tls return (dst); 104 1.2.8.2 tls } 105 1.2.8.2 tls 106 1.2.8.2 tls int 107 1.2.8.2 tls gelf_update_rela(Elf_Data *ed, int ndx, GElf_Rela *dr) 108 1.2.8.2 tls { 109 1.2.8.2 tls int ec; 110 1.2.8.2 tls Elf *e; 111 1.2.8.2 tls size_t msz; 112 1.2.8.2 tls Elf_Scn *scn; 113 1.2.8.2 tls uint32_t sh_type; 114 1.2.8.2 tls Elf32_Rela *rela32; 115 1.2.8.2 tls Elf64_Rela *rela64; 116 1.2.8.2 tls struct _Libelf_Data *d; 117 1.2.8.2 tls 118 1.2.8.2 tls d = (struct _Libelf_Data *) ed; 119 1.2.8.2 tls 120 1.2.8.2 tls if (d == NULL || ndx < 0 || dr == NULL || 121 1.2.8.2 tls (scn = d->d_scn) == NULL || 122 1.2.8.2 tls (e = scn->s_elf) == NULL) { 123 1.2.8.2 tls LIBELF_SET_ERROR(ARGUMENT, 0); 124 1.2.8.2 tls return (0); 125 1.2.8.2 tls } 126 1.2.8.2 tls 127 1.2.8.2 tls ec = e->e_class; 128 1.2.8.2 tls assert(ec == ELFCLASS32 || ec == ELFCLASS64); 129 1.2.8.2 tls 130 1.2.8.2 tls if (ec == ELFCLASS32) 131 1.2.8.2 tls sh_type = scn->s_shdr.s_shdr32.sh_type; 132 1.2.8.2 tls else 133 1.2.8.2 tls sh_type = scn->s_shdr.s_shdr64.sh_type; 134 1.2.8.2 tls 135 1.2.8.2 tls if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) { 136 1.2.8.2 tls LIBELF_SET_ERROR(ARGUMENT, 0); 137 1.2.8.2 tls return (0); 138 1.2.8.2 tls } 139 1.2.8.2 tls 140 1.2.8.2 tls msz = _libelf_msize(ELF_T_RELA, ec, e->e_version); 141 1.2.8.2 tls assert(msz > 0); 142 1.2.8.2 tls 143 1.2.8.2 tls if (msz * ndx >= d->d_data.d_size) { 144 1.2.8.2 tls LIBELF_SET_ERROR(ARGUMENT, 0); 145 1.2.8.2 tls return (0); 146 1.2.8.2 tls } 147 1.2.8.2 tls 148 1.2.8.2 tls if (ec == ELFCLASS32) { 149 1.2.8.2 tls rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx; 150 1.2.8.2 tls 151 1.2.8.2 tls LIBELF_COPY_U32(rela32, dr, r_offset); 152 1.2.8.2 tls 153 1.2.8.2 tls if (ELF64_R_SYM(dr->r_info) > ELF32_R_SYM(~0UL) || 154 1.2.8.2 tls ELF64_R_TYPE(dr->r_info) > ELF32_R_TYPE(~0U)) { 155 1.2.8.2 tls LIBELF_SET_ERROR(RANGE, 0); 156 1.2.8.2 tls return (0); 157 1.2.8.2 tls } 158 1.2.8.2 tls rela32->r_info = ELF32_R_INFO(ELF64_R_SYM(dr->r_info), 159 1.2.8.2 tls ELF64_R_TYPE(dr->r_info)); 160 1.2.8.2 tls 161 1.2.8.2 tls LIBELF_COPY_S32(rela32, dr, r_addend); 162 1.2.8.2 tls } else { 163 1.2.8.2 tls rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx; 164 1.2.8.2 tls 165 1.2.8.2 tls *rela64 = *dr; 166 1.2.8.2 tls } 167 1.2.8.2 tls 168 1.2.8.2 tls return (1); 169 1.2.8.2 tls } 170
Indexes created Wed Apr 08 00:23:23 UTC 2026