1/*- 2 * Copyright (c) 2003 Jake Burkholder. 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 * $FreeBSD$ 27 */ 28 29#include <sys/types.h> 30#include <machine/elf.h> 31 32#include <err.h> 33#include <string.h> 34 35#include "ef.h" 36 37/* 38 * Apply relocations to the values we got from the file. `relbase' is the 39 * target relocation address of the section, and `dataoff' is the target 40 * relocation address of the data in `dest'. 41 */ 42int 43ef_reloc(struct elf_file *ef, const void *reldata, int reltype, Elf_Off relbase, 44 Elf_Off dataoff, size_t len, void *dest) 45{ 46 const Elf_Rela *a; 47 Elf_Size w; 48 49 switch (reltype) { 50 case EF_RELOC_RELA: 51 a = reldata; 52 if (relbase + a->r_offset >= dataoff && relbase + a->r_offset < 53 dataoff + len) { 54 switch (ELF_R_TYPE(a->r_info)) { 55 case R_SPARC_RELATIVE: 56 w = a->r_addend + relbase; 57 memcpy((u_char *)dest + (relbase + a->r_offset - 58 dataoff), &w, sizeof(w)); 59 break; 60 default: 61 warnx("unhandled relocation type %u", 62 (unsigned int)ELF_R_TYPE(a->r_info)); 63 break; 64 } 65 } 66 break; 67 } 68 return (0); 69} 70