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>.
16 efi_status_t EFIAPI _relocate(long ldbase, Elf64_Dyn *dyn)
18 long relsz = 0, relent = 0;
23 for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
24 switch (dyn[i].d_tag) {
27 ((unsigned long)dyn[i].d_un.d_ptr + ldbase);
30 relsz = dyn[i].d_un.d_val;
33 relent = dyn[i].d_un.d_val;
40 if (!rel && relent == 0)
43 if (!rel || relent == 0)
44 return EFI_LOAD_ERROR;
47 /* apply the relocs */
48 switch (ELF64_R_TYPE(rel->r_info)) {
51 case R_X86_64_RELATIVE:
52 addr = (unsigned long *)(ldbase + rel->r_offset);
58 rel = (Elf64_Rel *)((char *)rel + relent);