1/* $NetBSD: gelf_syminfo.c,v 1.5 2024/03/03 17:37:34 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 38#include "_libelf.h" 39 40__RCSID("$NetBSD: gelf_syminfo.c,v 1.5 2024/03/03 17:37:34 christos Exp $"); 41ELFTC_VCSID("Id: gelf_syminfo.c 3977 2022-05-01 06:45:34Z jkoshy"); 42 43GElf_Syminfo * 44gelf_getsyminfo(Elf_Data *ed, int ndx, GElf_Syminfo *dst) 45{ 46 int ec; 47 Elf *e; 48 size_t msz; 49 Elf_Scn *scn; 50 uint32_t sh_type; 51 struct _Libelf_Data *d; 52 Elf32_Syminfo *syminfo32; 53 Elf64_Syminfo *syminfo64; 54 55 d = (struct _Libelf_Data *) ed; 56 57 if (d == NULL || ndx < 0 || dst == NULL || 58 (scn = d->d_scn) == NULL || 59 (e = scn->s_elf) == NULL) { 60 LIBELF_SET_ERROR(ARGUMENT, 0); 61 return (NULL); 62 } 63 64 ec = e->e_class; 65 assert(ec == ELFCLASS32 || ec == ELFCLASS64); 66 67 if (ec == ELFCLASS32) 68 sh_type = scn->s_shdr.s_shdr32.sh_type; 69 else 70 sh_type = scn->s_shdr.s_shdr64.sh_type; 71 72 if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { 73 LIBELF_SET_ERROR(ARGUMENT, 0); 74 return (NULL); 75 } 76 77 if ((msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version)) == 0) 78 return (NULL); 79 80 assert(ndx >= 0); 81 82 if (msz * (size_t) ndx >= d->d_data.d_size) { 83 LIBELF_SET_ERROR(ARGUMENT, 0); 84 return (NULL); 85 } 86 87 if (ec == ELFCLASS32) { 88 89 syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; 90 91 dst->si_boundto = syminfo32->si_boundto; 92 dst->si_flags = syminfo32->si_flags; 93 94 } else { 95 96 syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; 97 98 *dst = *syminfo64; 99 } 100 101 return (dst); 102} 103 104int 105gelf_update_syminfo(Elf_Data *ed, int ndx, GElf_Syminfo *gs) 106{ 107 int ec; 108 Elf *e; 109 size_t msz; 110 Elf_Scn *scn; 111 uint32_t sh_type; 112 struct _Libelf_Data *d; 113 Elf32_Syminfo *syminfo32; 114 Elf64_Syminfo *syminfo64; 115 116 d = (struct _Libelf_Data *) ed; 117 118 if (d == NULL || ndx < 0 || gs == NULL || 119 (scn = d->d_scn) == NULL || 120 (e = scn->s_elf) == NULL) { 121 LIBELF_SET_ERROR(ARGUMENT, 0); 122 return (0); 123 } 124 125 ec = e->e_class; 126 assert(ec == ELFCLASS32 || ec == ELFCLASS64); 127 128 if (ec == ELFCLASS32) 129 sh_type = scn->s_shdr.s_shdr32.sh_type; 130 else 131 sh_type = scn->s_shdr.s_shdr64.sh_type; 132 133 if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { 134 LIBELF_SET_ERROR(ARGUMENT, 0); 135 return (0); 136 } 137 138 if ((msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version)) == 0) 139 return (0); 140 141 assert(ndx >= 0); 142 143 if (msz * (size_t) ndx >= d->d_data.d_size) { 144 LIBELF_SET_ERROR(ARGUMENT, 0); 145 return (0); 146 } 147 148 if (ec == ELFCLASS32) { 149 syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; 150 151 syminfo32->si_boundto = gs->si_boundto; 152 syminfo32->si_flags = gs->si_flags; 153 154 } else { 155 syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; 156 157 *syminfo64 = *gs; 158 } 159 160 return (1); 161} 162