1 /* reloc_x86_64.c - position independent x86_64 ELF shared object relocator
2 Copyright (C) 1999 Hewlett-Packard Co.
3 Contributed by David Mosberger <davidm@hpl.hp.com>.
4 Copyright (C) 2005 Intel Co.
5 Contributed by Fenghua Yu <fenghua.yu@intel.com>.
9 Redistribution and use in source and binary forms, with or without
10 modification, are permitted provided that the following conditions
13 * Redistributions of source code must retain the above copyright
14 notice, this list of conditions and the following disclaimer.
15 * Redistributions in binary form must reproduce the above
16 copyright notice, this list of conditions and the following
17 disclaimer in the documentation and/or other materials
18 provided with the distribution.
19 * Neither the name of Hewlett-Packard Co. nor the names of its
20 contributors may be used to endorse or promote products derived
21 from this software without specific prior written permission.
23 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
24 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
25 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
27 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
28 BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
29 OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
31 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
33 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
34 THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 #include <link.h> /* get _DYNAMIC decl and ElfW and ELFW macros */
43 #define uint64_t efi_uint64_t
44 #define int64_t efi_int64_t
45 #define uint32_t efi_uint32_t
46 #define int32_t efi_int32_t
47 #define uint16_t efi_uint16_t
48 #define int16_t efi_int16_t
49 #define uint8_t efi_uint8_t
50 #define int8_t efi_int8_t
53 #define uint64_t efi_uint64_t
54 #define int64_t efi_int64_t
55 #define uint32_t efi_uint32_t
56 #define int32_t efi_int32_t
57 #define uint16_t efi_uint16_t
58 #define int16_t efi_int16_t
59 #define uint8_t efi_uint8_t
60 #define int8_t efi_int8_t
65 EFI_STATUS _relocate (long ldbase, ElfW(Dyn) *dyn, EFI_HANDLE image, EFI_SYSTEM_TABLE *systab)
67 long relsz = 0, relent = 0;
72 for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
73 switch (dyn[i].d_tag) {
76 ((unsigned long)dyn[i].d_un.d_ptr
81 relsz = dyn[i].d_un.d_val;
85 relent = dyn[i].d_un.d_val;
93 if (!rel && relent == 0)
96 if (!rel || relent == 0)
97 return EFI_LOAD_ERROR;
100 /* apply the relocs */
101 switch (ELF64_R_TYPE (rel->r_info)) {
105 case R_X86_64_RELATIVE:
106 addr = (unsigned long *)
107 (ldbase + rel->r_offset);
114 rel = (ElfW(Rel)*) ((char *) rel + relent);