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 | |