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 <assert.h> 28 #include <gelf.h> 29 30 #include "_libelf.h" 31 32 ELFTC_VCSID("$Id: gelf_syminfo.c 3174 2015-03-27 17:13:41Z emaste $"); 33 34 GElf_Syminfo * 35 gelf_getsyminfo(Elf_Data *ed, int ndx, GElf_Syminfo *dst) 36 { 37 int ec; 38 Elf *e; 39 size_t msz; 40 Elf_Scn *scn; 41 uint32_t sh_type; 42 struct _Libelf_Data *d; 43 Elf32_Syminfo *syminfo32; 44 Elf64_Syminfo *syminfo64; 45 46 d = (struct _Libelf_Data *) ed; 47 48 if (d == NULL || ndx < 0 || dst == NULL || 49 (scn = d->d_scn) == NULL || 50 (e = scn->s_elf) == NULL) { 51 LIBELF_SET_ERROR(ARGUMENT, 0); 52 return (NULL); 53 } 54 55 ec = e->e_class; 56 assert(ec == ELFCLASS32 || ec == ELFCLASS64); 57 58 if (ec == ELFCLASS32) 59 sh_type = scn->s_shdr.s_shdr32.sh_type; 60 else 61 sh_type = scn->s_shdr.s_shdr64.sh_type; 62 63 if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { 64 LIBELF_SET_ERROR(ARGUMENT, 0); 65 return (NULL); 66 } 67 68 msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version); 69 70 assert(msz > 0); 71 assert(ndx >= 0); 72 73 if (msz * (size_t) ndx >= d->d_data.d_size) { 74 LIBELF_SET_ERROR(ARGUMENT, 0); 75 return (NULL); 76 } 77 78 if (ec == ELFCLASS32) { 79 80 syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; 81 82 dst->si_boundto = syminfo32->si_boundto; 83 dst->si_flags = syminfo32->si_flags; 84 85 } else { 86 87 syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; 88 89 *dst = *syminfo64; 90 } 91 92 return (dst); 93 } 94 95 int 96 gelf_update_syminfo(Elf_Data *ed, int ndx, GElf_Syminfo *gs) 97 { 98 int ec; 99 Elf *e; 100 size_t msz; 101 Elf_Scn *scn; 102 uint32_t sh_type; 103 struct _Libelf_Data *d; 104 Elf32_Syminfo *syminfo32; 105 Elf64_Syminfo *syminfo64; 106 107 d = (struct _Libelf_Data *) ed; 108 109 if (d == NULL || ndx < 0 || gs == NULL || 110 (scn = d->d_scn) == NULL || 111 (e = scn->s_elf) == NULL) { 112 LIBELF_SET_ERROR(ARGUMENT, 0); 113 return (0); 114 } 115 116 ec = e->e_class; 117 assert(ec == ELFCLASS32 || ec == ELFCLASS64); 118 119 if (ec == ELFCLASS32) 120 sh_type = scn->s_shdr.s_shdr32.sh_type; 121 else 122 sh_type = scn->s_shdr.s_shdr64.sh_type; 123 124 if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { 125 LIBELF_SET_ERROR(ARGUMENT, 0); 126 return (0); 127 } 128 129 msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version); 130 131 assert(msz > 0); 132 assert(ndx >= 0); 133 134 if (msz * (size_t) ndx >= d->d_data.d_size) { 135 LIBELF_SET_ERROR(ARGUMENT, 0); 136 return (0); 137 } 138 139 if (ec == ELFCLASS32) { 140 syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; 141 142 syminfo32->si_boundto = gs->si_boundto; 143 syminfo32->si_flags = gs->si_flags; 144 145 } else { 146 syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; 147 148 *syminfo64 = *gs; 149 } 150 151 return (1); 152 } 153