| 1 | /* $NetBSD: kobj_machdep.c,v 1.5 2008/12/08 08:41:36 njoly Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2008 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software developed for The NetBSD Foundation |
| 8 | * by Andrew Doran. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /*- |
| 33 | * Copyright 1996-1998 John D. Polstra. |
| 34 | * All rights reserved. |
| 35 | * |
| 36 | * Redistribution and use in source and binary forms, with or without |
| 37 | * modification, are permitted provided that the following conditions |
| 38 | * are met: |
| 39 | * 1. Redistributions of source code must retain the above copyright |
| 40 | * notice, this list of conditions and the following disclaimer. |
| 41 | * 2. Redistributions in binary form must reproduce the above copyright |
| 42 | * notice, this list of conditions and the following disclaimer in the |
| 43 | * documentation and/or other materials provided with the distribution. |
| 44 | * |
| 45 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 46 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 47 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 48 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 49 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 50 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 51 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 52 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 53 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 54 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 55 | */ |
| 56 | |
| 57 | #include <sys/cdefs.h> |
| 58 | __KERNEL_RCSID(0, "$NetBSD: kobj_machdep.c,v 1.5 2008/12/08 08:41:36 njoly Exp $" ); |
| 59 | |
| 60 | #define ELFSIZE ARCH_ELFSIZE |
| 61 | |
| 62 | #include <sys/param.h> |
| 63 | #include <sys/systm.h> |
| 64 | #include <sys/kernel.h> |
| 65 | #include <sys/kobj.h> |
| 66 | #include <sys/exec.h> |
| 67 | #include <sys/exec_elf.h> |
| 68 | #include <sys/xcall.h> |
| 69 | |
| 70 | #include <machine/cpufunc.h> |
| 71 | |
| 72 | int |
| 73 | kobj_reloc(kobj_t ko, uintptr_t relocbase, const void *data, |
| 74 | bool isrela, bool local) |
| 75 | { |
| 76 | Elf64_Addr *where, val; |
| 77 | Elf32_Addr *where32, val32; |
| 78 | Elf64_Addr addr; |
| 79 | Elf64_Addr addend; |
| 80 | uintptr_t rtype, symidx; |
| 81 | const Elf_Rel *rel; |
| 82 | const Elf_Rela *rela; |
| 83 | |
| 84 | if (isrela) { |
| 85 | rela = (const Elf_Rela *)data; |
| 86 | where = (Elf64_Addr *)(relocbase + rela->r_offset); |
| 87 | addend = rela->r_addend; |
| 88 | rtype = ELF_R_TYPE(rela->r_info); |
| 89 | symidx = ELF_R_SYM(rela->r_info); |
| 90 | } else { |
| 91 | rel = (const Elf_Rel *)data; |
| 92 | where = (Elf64_Addr *)(relocbase + rel->r_offset); |
| 93 | rtype = ELF_R_TYPE(rel->r_info); |
| 94 | symidx = ELF_R_SYM(rel->r_info); |
| 95 | /* Addend is 32 bit on 32 bit relocs */ |
| 96 | switch (rtype) { |
| 97 | case R_X86_64_PC32: |
| 98 | case R_X86_64_32: |
| 99 | case R_X86_64_32S: |
| 100 | addend = *(Elf32_Addr *)where; |
| 101 | break; |
| 102 | default: |
| 103 | addend = *where; |
| 104 | break; |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | switch (rtype) { |
| 109 | case R_X86_64_NONE: /* none */ |
| 110 | break; |
| 111 | |
| 112 | case R_X86_64_64: /* S + A */ |
| 113 | addr = kobj_sym_lookup(ko, symidx); |
| 114 | if (addr == 0) |
| 115 | return -1; |
| 116 | val = addr + addend; |
| 117 | *where = val; |
| 118 | break; |
| 119 | |
| 120 | case R_X86_64_PC32: /* S + A - P */ |
| 121 | addr = kobj_sym_lookup(ko, symidx); |
| 122 | if (addr == 0) |
| 123 | return -1; |
| 124 | where32 = (Elf32_Addr *)where; |
| 125 | val32 = (Elf32_Addr)(addr + addend - (Elf64_Addr)where); |
| 126 | *where32 = val32; |
| 127 | break; |
| 128 | |
| 129 | case R_X86_64_32: /* S + A */ |
| 130 | case R_X86_64_32S: /* S + A sign extend */ |
| 131 | addr = kobj_sym_lookup(ko, symidx); |
| 132 | if (addr == 0) |
| 133 | return -1; |
| 134 | val32 = (Elf32_Addr)(addr + addend); |
| 135 | where32 = (Elf32_Addr *)where; |
| 136 | *where32 = val32; |
| 137 | break; |
| 138 | |
| 139 | case R_X86_64_GLOB_DAT: /* S */ |
| 140 | case R_X86_64_JUMP_SLOT:/* XXX need addend + offset */ |
| 141 | addr = kobj_sym_lookup(ko, symidx); |
| 142 | if (addr == 0) |
| 143 | return -1; |
| 144 | *where = addr; |
| 145 | break; |
| 146 | |
| 147 | case R_X86_64_RELATIVE: /* B + A */ |
| 148 | addr = relocbase + addend; |
| 149 | val = addr; |
| 150 | *where = val; |
| 151 | break; |
| 152 | |
| 153 | default: |
| 154 | printf("kobj_reloc: unexpected relocation type %ld\n" , rtype); |
| 155 | return -1; |
| 156 | } |
| 157 | |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | int |
| 162 | kobj_machdep(kobj_t ko, void *base, size_t size, bool load) |
| 163 | { |
| 164 | uint64_t where; |
| 165 | |
| 166 | if (load) { |
| 167 | if (cold) { |
| 168 | wbinvd(); |
| 169 | } else { |
| 170 | where = xc_broadcast(0, (xcfunc_t)wbinvd, NULL, NULL); |
| 171 | xc_wait(where); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |