1 /*- 2 * Copyright (c) 2006,2008 Joseph Koshy 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 29 #include <assert.h> 30 #include <gelf.h> 31 32 #include "_libelf.h" 33 34 ELFTC_VCSID("$Id: gelf_syminfo.c 2998 2014-03-18 17:19:00Z jkoshy $"); 35 36 GElf_Syminfo * 37 gelf_getsyminfo(Elf_Data *ed, int ndx, GElf_Syminfo *dst) 38 { 39 int ec; 40 Elf *e; 41 size_t msz; 42 Elf_Scn *scn; 43 uint32_t sh_type; 44 struct _Libelf_Data *d; 45 Elf32_Syminfo *syminfo32; 46 Elf64_Syminfo *syminfo64; 47 48 d = (struct _Libelf_Data *) ed; 49 50 if (d == NULL || ndx < 0 || dst == NULL || 51 (scn = d->d_scn) == NULL || 52 (e = scn->s_elf) == NULL) { 53 LIBELF_SET_ERROR(ARGUMENT, 0); 54 return (NULL); 55 } 56 57 ec = e->e_class; 58 assert(ec == ELFCLASS32 || ec == ELFCLASS64); 59 60 if (ec == ELFCLASS32) 61 sh_type = scn->s_shdr.s_shdr32.sh_type; 62 else 63 sh_type = scn->s_shdr.s_shdr64.sh_type; 64 65 if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { 66 LIBELF_SET_ERROR(ARGUMENT, 0); 67 return (NULL); 68 } 69 70 msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version); 71 72 assert(msz > 0); 73 assert(ndx >= 0); 74 75 if (msz * (size_t) ndx >= d->d_data.d_size) { 76 LIBELF_SET_ERROR(ARGUMENT, 0); 77 return (NULL); 78 } 79 80 if (ec == ELFCLASS32) { 81 82 syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; 83 84 dst->si_boundto = syminfo32->si_boundto; 85 dst->si_flags = syminfo32->si_flags; 86 87 } else { 88 89 syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; 90 91 *dst = *syminfo64; 92 } 93 94 return (dst); 95 } 96 97 int 98 gelf_update_syminfo(Elf_Data *ed, int ndx, GElf_Syminfo *gs) 99 { 100 int ec; 101 Elf *e; 102 size_t msz; 103 Elf_Scn *scn; 104 uint32_t sh_type; 105 struct _Libelf_Data *d; 106 Elf32_Syminfo *syminfo32; 107 Elf64_Syminfo *syminfo64; 108 109 d = (struct _Libelf_Data *) ed; 110 111 if (d == NULL || ndx < 0 || gs == NULL || 112 (scn = d->d_scn) == NULL || 113 (e = scn->s_elf) == NULL) { 114 LIBELF_SET_ERROR(ARGUMENT, 0); 115 return (0); 116 } 117 118 ec = e->e_class; 119 assert(ec == ELFCLASS32 || ec == ELFCLASS64); 120 121 if (ec == ELFCLASS32) 122 sh_type = scn->s_shdr.s_shdr32.sh_type; 123 else 124 sh_type = scn->s_shdr.s_shdr64.sh_type; 125 126 if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { 127 LIBELF_SET_ERROR(ARGUMENT, 0); 128 return (0); 129 } 130 131 msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version); 132 133 assert(msz > 0); 134 assert(ndx >= 0); 135 136 if (msz * (size_t) ndx >= d->d_data.d_size) { 137 LIBELF_SET_ERROR(ARGUMENT, 0); 138 return (0); 139 } 140 141 if (ec == ELFCLASS32) { 142 syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; 143 144 syminfo32->si_boundto = gs->si_boundto; 145 syminfo32->si_flags = gs->si_flags; 146 147 } else { 148 syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; 149 150 *syminfo64 = *gs; 151 } 152 153 return (1); 154 } 155