/* $NetBSD: gelf_rel.c,v 1.4 2010/02/22 10:48:32 darran Exp $ */ /*- * Copyright (c) 2006 Joseph Koshy * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #if HAVE_NBTOOL_CONFIG_H # include "nbtool_config.h" #endif #include /* __FBSDID("$FreeBSD: src/lib/libelf/gelf_rel.c,v 1.2.2.1.2.1 2009/10/25 01:10:29 kensmith Exp $"); */ #include #include #include #include "_libelf.h" GElf_Rel * gelf_getrel(Elf_Data *d, int ndx, GElf_Rel *dst) { int ec; Elf *e; Elf_Scn *scn; Elf32_Rel *rel32; Elf64_Rel *rel64; size_t msz; uint32_t sh_type; if (d == NULL || ndx < 0 || dst == NULL || (scn = d->d_scn) == NULL || (e = scn->s_elf) == NULL) { LIBELF_SET_ERROR(ARGUMENT, 0); return (NULL); } ec = e->e_class; assert(ec == ELFCLASS32 || ec == ELFCLASS64); if (ec == ELFCLASS32) sh_type = scn->s_shdr.s_shdr32.sh_type; else sh_type = scn->s_shdr.s_shdr64.sh_type; if (_libelf_xlate_shtype(sh_type) != ELF_T_REL) { LIBELF_SET_ERROR(ARGUMENT, 0); return (NULL); } msz = _libelf_msize(ELF_T_REL, ec, e->e_version); assert(msz > 0); if (msz * ndx >= d->d_size) { LIBELF_SET_ERROR(ARGUMENT, 0); return (NULL); } if (ec == ELFCLASS32) { rel32 = (Elf32_Rel *) d->d_buf + ndx; dst->r_offset = (Elf64_Addr) rel32->r_offset; dst->r_info = ELF64_R_INFO( (Elf64_Xword) ELF32_R_SYM(rel32->r_info), ELF32_R_TYPE(rel32->r_info)); } else { rel64 = (Elf64_Rel *) d->d_buf + ndx; *dst = *rel64; } return (dst); } int gelf_update_rel(Elf_Data *d, int ndx, GElf_Rel *dr) { int ec; Elf *e; Elf_Scn *scn; Elf32_Rel *rel32; Elf64_Rel *rel64; size_t msz; uint32_t sh_type; if (d == NULL || ndx < 0 || dr == NULL || (scn = d->d_scn) == NULL || (e = scn->s_elf) == NULL) { LIBELF_SET_ERROR(ARGUMENT, 0); return (0); } ec = e->e_class; assert(ec == ELFCLASS32 || ec == ELFCLASS64); if (ec == ELFCLASS32) sh_type = scn->s_shdr.s_shdr32.sh_type; else sh_type = scn->s_shdr.s_shdr64.sh_type; if (_libelf_xlate_shtype(sh_type) != ELF_T_REL) { LIBELF_SET_ERROR(ARGUMENT, 0); return (0); } msz = _libelf_msize(ELF_T_REL, ec, e->e_version); assert(msz > 0); if (msz * ndx >= d->d_size) { LIBELF_SET_ERROR(ARGUMENT, 0); return (0); } if (ec == ELFCLASS32) { rel32 = (Elf32_Rel *) d->d_buf + ndx; LIBELF_COPY_U32(rel32, dr, r_offset); if (ELF64_R_SYM(dr->r_info) > ELF32_R_SYM(~0UL) || ELF64_R_TYPE(dr->r_info) > ELF32_R_TYPE(~0U)) { LIBELF_SET_ERROR(RANGE, 0); return (0); } rel32->r_info = ELF32_R_INFO(ELF64_R_SYM(dr->r_info), ELF64_R_TYPE(dr->r_info)); } else { rel64 = (Elf64_Rel *) d->d_buf + ndx; *rel64 = *dr; } return (1); }