kobj_machdep.c revision 1.1.16.1 1 1.1.16.1 mjf /* $NetBSD: kobj_machdep.c,v 1.1.16.1 2008/06/02 13:21:53 mjf Exp $ */
2 1.1 ad
3 1.1 ad /*-
4 1.1 ad * Copyright (c) 2008 The NetBSD Foundation, Inc.
5 1.1 ad * All rights reserved.
6 1.1 ad *
7 1.1 ad * Redistribution and use in source and binary forms, with or without
8 1.1 ad * modification, are permitted provided that the following conditions
9 1.1 ad * are met:
10 1.1 ad * 1. Redistributions of source code must retain the above copyright
11 1.1 ad * notice, this list of conditions and the following disclaimer.
12 1.1 ad * 2. Redistributions in binary form must reproduce the above copyright
13 1.1 ad * notice, this list of conditions and the following disclaimer in the
14 1.1 ad * documentation and/or other materials provided with the distribution.
15 1.1 ad *
16 1.1 ad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 1.1 ad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 1.1 ad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 1.1 ad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 1.1 ad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 1.1 ad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 1.1 ad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 1.1 ad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 1.1 ad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 1.1 ad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 1.1 ad * POSSIBILITY OF SUCH DAMAGE.
27 1.1 ad */
28 1.1 ad
29 1.1 ad /*-
30 1.1 ad * Copyright 1996-1998 John D. Polstra.
31 1.1 ad * All rights reserved.
32 1.1 ad *
33 1.1 ad * Redistribution and use in source and binary forms, with or without
34 1.1 ad * modification, are permitted provided that the following conditions
35 1.1 ad * are met:
36 1.1 ad * 1. Redistributions of source code must retain the above copyright
37 1.1 ad * notice, this list of conditions and the following disclaimer.
38 1.1 ad * 2. Redistributions in binary form must reproduce the above copyright
39 1.1 ad * notice, this list of conditions and the following disclaimer in the
40 1.1 ad * documentation and/or other materials provided with the distribution.
41 1.1 ad *
42 1.1 ad * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
43 1.1 ad * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
44 1.1 ad * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
45 1.1 ad * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
46 1.1 ad * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
47 1.1 ad * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
48 1.1 ad * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
49 1.1 ad * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
50 1.1 ad * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
51 1.1 ad * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
52 1.1 ad */
53 1.1 ad
54 1.1 ad #include <sys/cdefs.h>
55 1.1.16.1 mjf __KERNEL_RCSID(0, "$NetBSD: kobj_machdep.c,v 1.1.16.1 2008/06/02 13:21:53 mjf Exp $");
56 1.1 ad
57 1.1 ad #define ELFSIZE ARCH_ELFSIZE
58 1.1 ad
59 1.1 ad #include <sys/param.h>
60 1.1 ad #include <sys/systm.h>
61 1.1 ad #include <sys/kobj.h>
62 1.1 ad #include <sys/exec.h>
63 1.1 ad #include <sys/exec_elf.h>
64 1.1 ad
65 1.1 ad #include <arm/cpufunc.h>
66 1.1 ad
67 1.1 ad int
68 1.1 ad kobj_reloc(kobj_t ko, uintptr_t relocbase, const void *data,
69 1.1 ad bool isrela, bool local)
70 1.1 ad {
71 1.1 ad Elf_Addr *where;
72 1.1 ad Elf_Addr addr;
73 1.1 ad Elf_Addr addend;
74 1.1 ad Elf_Word rtype, symidx;
75 1.1 ad const Elf_Rel *rel;
76 1.1 ad const Elf_Rela *rela;
77 1.1 ad
78 1.1 ad if (isrela) {
79 1.1 ad rela = (const Elf_Rela *)data;
80 1.1 ad where = (Elf_Addr *) (relocbase + rela->r_offset);
81 1.1 ad addend = rela->r_addend;
82 1.1 ad rtype = ELF_R_TYPE(rela->r_info);
83 1.1 ad symidx = ELF_R_SYM(rela->r_info);
84 1.1 ad } else {
85 1.1 ad rel = (const Elf_Rel *)data;
86 1.1 ad where = (Elf_Addr *) (relocbase + rel->r_offset);
87 1.1 ad addend = *where;
88 1.1 ad rtype = ELF_R_TYPE(rel->r_info);
89 1.1 ad symidx = ELF_R_SYM(rel->r_info);
90 1.1 ad }
91 1.1 ad
92 1.1 ad switch (rtype) {
93 1.1 ad case R_ARM_NONE: /* none */
94 1.1 ad break;
95 1.1 ad
96 1.1 ad case R_ARM_ABS32:
97 1.1 ad addr = kobj_sym_lookup(ko, symidx);
98 1.1 ad if (addr == 0)
99 1.1 ad return -1;
100 1.1 ad if (*where != addr)
101 1.1 ad *where = addr;
102 1.1 ad
103 1.1 ad break;
104 1.1 ad
105 1.1 ad case R_ARM_COPY: /* none */
106 1.1 ad /*
107 1.1 ad * There shouldn't be copy relocations in kernel
108 1.1 ad * objects.
109 1.1 ad */
110 1.1 ad printf("kobj_reloc: unexpected R_COPY relocation\n");
111 1.1 ad return -1;
112 1.1 ad
113 1.1 ad case R_ARM_JUMP_SLOT:
114 1.1 ad addr = kobj_sym_lookup(ko, symidx);
115 1.1 ad if (addr) {
116 1.1 ad *where = addr;
117 1.1 ad return 0;
118 1.1 ad }
119 1.1 ad return -1;
120 1.1 ad
121 1.1 ad case R_ARM_RELATIVE: /* A + B */
122 1.1 ad addr = relocbase + addend;
123 1.1 ad if (*where != addr)
124 1.1 ad *where = addr;
125 1.1 ad break;
126 1.1 ad
127 1.1 ad default:
128 1.1 ad printf("kobj_reloc: unexpected relocation type %d\n", rtype);
129 1.1 ad return -1;
130 1.1 ad }
131 1.1 ad return 0;
132 1.1 ad }
133 1.1 ad
134 1.1 ad int
135 1.1 ad kobj_machdep(kobj_t ko, void *base, size_t size, bool load)
136 1.1 ad {
137 1.1 ad
138 1.1 ad if (load) {
139 1.1 ad cpu_idcache_wbinv_all();
140 1.1 ad cpu_tlb_flushID();
141 1.1 ad }
142 1.1 ad
143 1.1 ad return 0;
144 1.1 ad }
145