1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2003 Jake Burkholder. 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 * $FreeBSD$ 29 */ 30 31#include <sys/types.h> 32#include <machine/elf.h> 33 34#include <err.h> 35#include <string.h> 36 37#include "ef.h" 38 39/* 40 * Apply relocations to the values we got from the file. `relbase' is the 41 * target relocation address of the section, and `dataoff' is the target 42 * relocation address of the data in `dest'. 43 */ 44int 45ef_reloc(struct elf_file *ef, const void *reldata, int reltype, Elf_Off relbase, 46 Elf_Off dataoff, size_t len, void *dest) 47{ 48 const Elf_Rela *a; 49 Elf_Size w; 50 51 switch (reltype) { 52 case EF_RELOC_RELA: 53 a = reldata; 54 if (relbase + a->r_offset >= dataoff && relbase + a->r_offset < 55 dataoff + len) { 56 switch (ELF_R_TYPE(a->r_info)) { 57 case R_SPARC_RELATIVE: 58 w = a->r_addend + relbase; 59 memcpy((u_char *)dest + (relbase + a->r_offset - 60 dataoff), &w, sizeof(w)); 61 break; 62 default: 63 warnx("unhandled relocation type %u", 64 (unsigned int)ELF_R_TYPE(a->r_info)); 65 break; 66 } 67 } 68 break; 69 } 70 return (0); 71} 72