1 // SPDX-License-Identifier: BSD-3-Clause
3 * reloc_x86_64.c - position independent x86_64 ELF shared object relocator
4 * Copyright (C) 1999 Hewlett-Packard Co.
5 * Contributed by David Mosberger <davidm@hpl.hp.com>.
6 * Copyright (C) 2005 Intel Co.
7 * Contributed by Fenghua Yu <fenghua.yu@intel.com>.
17 efi_status_t _relocate(long ldbase, Elf64_Dyn *dyn, efi_handle_t image,
18 struct efi_system_table *systab)
20 long relsz = 0, relent = 0;
25 for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
26 switch (dyn[i].d_tag) {
29 ((unsigned long)dyn[i].d_un.d_ptr + ldbase);
32 relsz = dyn[i].d_un.d_val;
35 relent = dyn[i].d_un.d_val;
42 if (!rel && relent == 0)
45 if (!rel || relent == 0)
46 return EFI_LOAD_ERROR;
49 /* apply the relocs */
50 switch (ELF64_R_TYPE(rel->r_info)) {
53 case R_X86_64_RELATIVE:
54 addr = (unsigned long *)(ldbase + rel->r_offset);
60 rel = (Elf64_Rel *)((char *)rel + relent);