1 /*- 2 * Copyright (c) 2005 Peter Grehan. 3 * Copyright 1996-1998 John D. Polstra. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include <sys/types.h> 31 #include <machine/elf.h> 32 33 #include <err.h> 34 #include <errno.h> 35 #include <string.h> 36 37 #include "ef.h" 38 39 /* 40 * Apply relocations to the values obtained from the file. `relbase' is the 41 * target relocation address of the section, and `dataoff/len' is the region 42 * that is to be relocated, and has been copied to *dest 43 */ 44 int 45 ef_reloc(struct elf_file *ef, const void *reldata, int reltype, Elf_Off relbase, 46 Elf_Off dataoff, size_t len, void *dest) 47 { 48 Elf_Addr *where, addend; 49 Elf_Size rtype; 50 const Elf_Rela *rela; 51 52 if (reltype != EF_RELOC_RELA) 53 return (EINVAL); 54 55 rela = (const Elf_Rela *)reldata; 56 where = (Elf_Addr *) ((Elf_Off)dest - dataoff + rela->r_offset); 57 addend = rela->r_addend; 58 rtype = ELF_R_TYPE(rela->r_info); 59 60 if ((char *)where < (char *)dest || (char *)where >= (char *)dest + len) 61 return (0); 62 63 switch(rtype) { 64 case R_AARCH64_RELATIVE: 65 *where = relbase + addend; 66 break; 67 case R_AARCH64_ABS64: 68 break; 69 default: 70 warnx("unhandled relocation type %lu", rtype); 71 break; 72 } 73 return (0); 74 } 75