1/*- 2 * Copyright (c) 2006 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__FBSDID("$FreeBSD$"); 29 30#include <sys/limits.h> 31 32#include <assert.h> 33#include <gelf.h> 34#include <osreldate.h> 35 36#include "_libelf.h" 37 38#if __FreeBSD_version >= 700025 39 40GElf_Cap * 41gelf_getcap(Elf_Data *d, int ndx, GElf_Cap *dst) 42{ 43 int ec; 44 Elf *e; 45 Elf_Scn *scn; 46 Elf32_Cap *cap32; 47 Elf64_Cap *cap64; 48 size_t msz; 49 uint32_t sh_type; 50 51 if (d == NULL || ndx < 0 || dst == NULL || 52 (scn = d->d_scn) == NULL || 53 (e = scn->s_elf) == NULL) { 54 LIBELF_SET_ERROR(ARGUMENT, 0); 55 return (NULL); 56 } 57 58 ec = e->e_class; 59 assert(ec == ELFCLASS32 || ec == ELFCLASS64); 60 61 if (ec == ELFCLASS32) 62 sh_type = scn->s_shdr.s_shdr32.sh_type; 63 else 64 sh_type = scn->s_shdr.s_shdr64.sh_type; 65 66 if (_libelf_xlate_shtype(sh_type) != ELF_T_CAP) { 67 LIBELF_SET_ERROR(ARGUMENT, 0); 68 return (NULL); 69 } 70 71 msz = _libelf_msize(ELF_T_CAP, ec, e->e_version); 72 73 assert(msz > 0); 74 75 if (msz * ndx >= d->d_size) { 76 LIBELF_SET_ERROR(ARGUMENT, 0); 77 return (NULL); 78 } 79 80 if (ec == ELFCLASS32) { 81 82 cap32 = (Elf32_Cap *) d->d_buf + ndx; 83 84 dst->c_tag = cap32->c_tag; 85 dst->c_un.c_val = (Elf64_Xword) cap32->c_un.c_val; 86 87 } else { 88 89 cap64 = (Elf64_Cap *) d->d_buf + ndx; 90 91 *dst = *cap64; 92 } 93 94 return (dst); 95} 96 97int 98gelf_update_cap(Elf_Data *d, int ndx, GElf_Cap *gc) 99{ 100 int ec; 101 Elf *e; 102 Elf_Scn *scn; 103 Elf32_Cap *cap32; 104 Elf64_Cap *cap64; 105 size_t msz; 106 uint32_t sh_type; 107 108 if (d == NULL || ndx < 0 || gc == NULL || 109 (scn = d->d_scn) == NULL || 110 (e = scn->s_elf) == NULL) { 111 LIBELF_SET_ERROR(ARGUMENT, 0); 112 return (0); 113 } 114 115 ec = e->e_class; 116 assert(ec == ELFCLASS32 || ec == ELFCLASS64); 117 118 if (ec == ELFCLASS32) 119 sh_type = scn->s_shdr.s_shdr32.sh_type; 120 else 121 sh_type = scn->s_shdr.s_shdr64.sh_type; 122 123 if (_libelf_xlate_shtype(sh_type) != ELF_T_CAP) { 124 LIBELF_SET_ERROR(ARGUMENT, 0); 125 return (0); 126 } 127 128 msz = _libelf_msize(ELF_T_CAP, ec, e->e_version); 129 assert(msz > 0); 130 131 if (msz * ndx >= d->d_size) { 132 LIBELF_SET_ERROR(ARGUMENT, 0); 133 return (0); 134 } 135 136 if (ec == ELFCLASS32) { 137 cap32 = (Elf32_Cap *) d->d_buf + ndx; 138 139 LIBELF_COPY_U32(cap32, gc, c_tag); 140 LIBELF_COPY_U32(cap32, gc, c_un.c_val); 141 } else { 142 cap64 = (Elf64_Cap *) d->d_buf + ndx; 143 144 *cap64 = *gc; 145 } 146 147 return (1); 148} 149 150#endif /* __FreeBSD_version >= 700025 */ 151