1 /* $NetBSD: kobj_machdep.c,v 1.3 2010/10/14 16:33:50 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: kobj_machdep.c,v 1.3 2010/10/14 16:33:50 tsutsui Exp $"); 31 32 #define ELFSIZE ARCH_ELFSIZE 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kobj.h> 37 #include <sys/exec.h> 38 #include <sys/exec_elf.h> 39 40 int 41 kobj_reloc(kobj_t ko, uintptr_t relocbase, const void *data, 42 bool isrela, bool local) 43 { 44 Elf_Addr *where; 45 uintptr_t addr, tmp; 46 int rtype, symnum; 47 const Elf_Rela *rela; 48 49 if (!isrela) { 50 printf("kobj_reloc: support only RELA relocations\n"); 51 return -1; 52 } 53 54 rela = data; 55 where = (Elf_Addr *)(relocbase + rela->r_offset); 56 symnum = ELF_R_SYM(rela->r_info); 57 rtype = ELF_R_TYPE(rela->r_info); 58 59 switch (rtype) { 60 case R_TYPE(NONE): 61 break; 62 63 case R_TYPE(PC32): 64 addr = kobj_sym_lookup(ko, symnum); 65 if (addr == 0) 66 return -1; 67 tmp = (Elf_Addr)(addr + rela->r_addend) - (Elf_Addr)where; 68 if (*where != tmp) 69 *where = tmp; 70 break; 71 72 case R_TYPE(32): 73 case R_TYPE(GLOB_DAT): 74 addr = kobj_sym_lookup(ko, symnum); 75 if (addr == 0) 76 return -1; 77 tmp = (Elf_Addr)(addr + *where + rela->r_addend); 78 *where = tmp; 79 break; 80 81 case R_TYPE(RELATIVE): 82 *where += (Elf_Addr)(relocbase + rela->r_addend); 83 break; 84 85 default: 86 printf("kobj_reloc: unexpected relocation type %d\n", 87 (int)rtype); 88 return -1; 89 } 90 91 return 0; 92 } 93 94 int 95 kobj_machdep(kobj_t ko, void *base, size_t size, bool load) 96 { 97 98 return 0; 99 } 100