reloc_ia32.c revision 1.1.1.1.4.2 1 1.1.1.1.4.2 rmind /* $NetBSD: reloc_ia32.c,v 1.1.1.1.4.2 2014/05/18 17:46:02 rmind Exp $ */
2 1.1.1.1.4.2 rmind
3 1.1.1.1.4.2 rmind /* reloc_ia32.c - position independent x86 ELF shared object relocator
4 1.1.1.1.4.2 rmind Copyright (C) 1999 Hewlett-Packard Co.
5 1.1.1.1.4.2 rmind Contributed by David Mosberger <davidm (at) hpl.hp.com>.
6 1.1.1.1.4.2 rmind
7 1.1.1.1.4.2 rmind All rights reserved.
8 1.1.1.1.4.2 rmind
9 1.1.1.1.4.2 rmind Redistribution and use in source and binary forms, with or without
10 1.1.1.1.4.2 rmind modification, are permitted provided that the following conditions
11 1.1.1.1.4.2 rmind are met:
12 1.1.1.1.4.2 rmind
13 1.1.1.1.4.2 rmind * Redistributions of source code must retain the above copyright
14 1.1.1.1.4.2 rmind notice, this list of conditions and the following disclaimer.
15 1.1.1.1.4.2 rmind * Redistributions in binary form must reproduce the above
16 1.1.1.1.4.2 rmind copyright notice, this list of conditions and the following
17 1.1.1.1.4.2 rmind disclaimer in the documentation and/or other materials
18 1.1.1.1.4.2 rmind provided with the distribution.
19 1.1.1.1.4.2 rmind * Neither the name of Hewlett-Packard Co. nor the names of its
20 1.1.1.1.4.2 rmind contributors may be used to endorse or promote products derived
21 1.1.1.1.4.2 rmind from this software without specific prior written permission.
22 1.1.1.1.4.2 rmind
23 1.1.1.1.4.2 rmind THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
24 1.1.1.1.4.2 rmind CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
25 1.1.1.1.4.2 rmind INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 1.1.1.1.4.2 rmind MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
27 1.1.1.1.4.2 rmind DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
28 1.1.1.1.4.2 rmind BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
29 1.1.1.1.4.2 rmind OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 1.1.1.1.4.2 rmind PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
31 1.1.1.1.4.2 rmind PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 1.1.1.1.4.2 rmind THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
33 1.1.1.1.4.2 rmind TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
34 1.1.1.1.4.2 rmind THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 1.1.1.1.4.2 rmind SUCH DAMAGE.
36 1.1.1.1.4.2 rmind */
37 1.1.1.1.4.2 rmind
38 1.1.1.1.4.2 rmind #include <efi.h>
39 1.1.1.1.4.2 rmind #include <efilib.h>
40 1.1.1.1.4.2 rmind
41 1.1.1.1.4.2 rmind #include <elf.h>
42 1.1.1.1.4.2 rmind
43 1.1.1.1.4.2 rmind EFI_STATUS _relocate (long ldbase, Elf32_Dyn *dyn, EFI_HANDLE image, EFI_SYSTEM_TABLE *systab)
44 1.1.1.1.4.2 rmind {
45 1.1.1.1.4.2 rmind long relsz = 0, relent = 0;
46 1.1.1.1.4.2 rmind Elf32_Rel *rel = 0;
47 1.1.1.1.4.2 rmind unsigned long *addr;
48 1.1.1.1.4.2 rmind int i;
49 1.1.1.1.4.2 rmind
50 1.1.1.1.4.2 rmind for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
51 1.1.1.1.4.2 rmind switch (dyn[i].d_tag) {
52 1.1.1.1.4.2 rmind case DT_REL:
53 1.1.1.1.4.2 rmind rel = (Elf32_Rel*)
54 1.1.1.1.4.2 rmind ((unsigned long)dyn[i].d_un.d_ptr
55 1.1.1.1.4.2 rmind + ldbase);
56 1.1.1.1.4.2 rmind break;
57 1.1.1.1.4.2 rmind
58 1.1.1.1.4.2 rmind case DT_RELSZ:
59 1.1.1.1.4.2 rmind relsz = dyn[i].d_un.d_val;
60 1.1.1.1.4.2 rmind break;
61 1.1.1.1.4.2 rmind
62 1.1.1.1.4.2 rmind case DT_RELENT:
63 1.1.1.1.4.2 rmind relent = dyn[i].d_un.d_val;
64 1.1.1.1.4.2 rmind break;
65 1.1.1.1.4.2 rmind
66 1.1.1.1.4.2 rmind case DT_RELA:
67 1.1.1.1.4.2 rmind break;
68 1.1.1.1.4.2 rmind
69 1.1.1.1.4.2 rmind default:
70 1.1.1.1.4.2 rmind break;
71 1.1.1.1.4.2 rmind }
72 1.1.1.1.4.2 rmind }
73 1.1.1.1.4.2 rmind
74 1.1.1.1.4.2 rmind if (!rel && relent == 0)
75 1.1.1.1.4.2 rmind return EFI_SUCCESS;
76 1.1.1.1.4.2 rmind
77 1.1.1.1.4.2 rmind if (!rel || relent == 0)
78 1.1.1.1.4.2 rmind return EFI_LOAD_ERROR;
79 1.1.1.1.4.2 rmind
80 1.1.1.1.4.2 rmind while (relsz > 0) {
81 1.1.1.1.4.2 rmind /* apply the relocs */
82 1.1.1.1.4.2 rmind switch (ELF32_R_TYPE (rel->r_info)) {
83 1.1.1.1.4.2 rmind case R_386_NONE:
84 1.1.1.1.4.2 rmind break;
85 1.1.1.1.4.2 rmind
86 1.1.1.1.4.2 rmind case R_386_RELATIVE:
87 1.1.1.1.4.2 rmind addr = (unsigned long *)
88 1.1.1.1.4.2 rmind (ldbase + rel->r_offset);
89 1.1.1.1.4.2 rmind *addr += ldbase;
90 1.1.1.1.4.2 rmind break;
91 1.1.1.1.4.2 rmind
92 1.1.1.1.4.2 rmind default:
93 1.1.1.1.4.2 rmind break;
94 1.1.1.1.4.2 rmind }
95 1.1.1.1.4.2 rmind rel = (Elf32_Rel*) ((char *) rel + relent);
96 1.1.1.1.4.2 rmind relsz -= relent;
97 1.1.1.1.4.2 rmind }
98 1.1.1.1.4.2 rmind return EFI_SUCCESS;
99 1.1.1.1.4.2 rmind }
100