projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | // SPDX-License-Identifier: BSD-3-Clause |
| 465a67cf SG |
2 | /* |
| 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>. | |
| 8 | * | |
| 9 | * All rights reserved. | |
| 465a67cf SG |
10 | */ |
| 11 | ||
| d678a59d | 12 | #include <common.h> |
| 465a67cf SG |
13 | #include <efi.h> |
| 14 | #include <elf.h> | |
| 465a67cf | 15 | |
| 62500986 | 16 | efi_status_t EFIAPI _relocate(long ldbase, Elf64_Dyn *dyn) |
| 465a67cf SG |
17 | { |
| 18 | long relsz = 0, relent = 0; | |
| 19 | Elf64_Rel *rel = 0; | |
| 20 | unsigned long *addr; | |
| 21 | int i; | |
| 22 | ||
| 23 | for (i = 0; dyn[i].d_tag != DT_NULL; ++i) { | |
| 24 | switch (dyn[i].d_tag) { | |
| 25 | case DT_RELA: | |
| 26 | rel = (Elf64_Rel *) | |
| 27 | ((unsigned long)dyn[i].d_un.d_ptr + ldbase); | |
| 28 | break; | |
| 29 | case DT_RELASZ: | |
| 30 | relsz = dyn[i].d_un.d_val; | |
| 31 | break; | |
| 32 | case DT_RELAENT: | |
| 33 | relent = dyn[i].d_un.d_val; | |
| 34 | break; | |
| 35 | default: | |
| 36 | break; | |
| 37 | } | |
| 38 | } | |
| 39 | ||
| 40 | if (!rel && relent == 0) | |
| 41 | return EFI_SUCCESS; | |
| 42 | ||
| 43 | if (!rel || relent == 0) | |
| 44 | return EFI_LOAD_ERROR; | |
| 45 | ||
| 46 | while (relsz > 0) { | |
| 47 | /* apply the relocs */ | |
| 48 | switch (ELF64_R_TYPE(rel->r_info)) { | |
| 49 | case R_X86_64_NONE: | |
| 50 | break; | |
| 51 | case R_X86_64_RELATIVE: | |
| 52 | addr = (unsigned long *)(ldbase + rel->r_offset); | |
| 53 | *addr += ldbase; | |
| 54 | break; | |
| 55 | default: | |
| 56 | break; | |
| 57 | } | |
| 58 | rel = (Elf64_Rel *)((char *)rel + relent); | |
| 59 | relsz -= relent; | |
| 60 | } | |
| 61 | ||
| 62 | return EFI_SUCCESS; | |
| 63 | } |