| 0,0 → 1,103 |
|---|
| /* reloc_ia32.c - position independent x86 ELF shared object relocator |
| Copyright (C) 1999 Hewlett-Packard Co. |
| Contributed by David Mosberger <davidm@hpl.hp.com>. |
| |
| This file is part of GNU-EFI, the GNU EFI development environment. |
| |
| GNU EFI is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU EFI is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU EFI; see the file COPYING. If not, write to the Free |
| Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 02111-1307, USA. */ |
| |
| #include <elf.h> |
| #include <link.h> /* get _DYNAMIC decl and ElfW and ELFW macros */ |
| |
| #undef NULL |
| #define uint64_t efi_uint64_t |
| #define int64_t efi_int64_t |
| #define uint32_t efi_uint32_t |
| #define int32_t efi_int32_t |
| #define uint16_t efi_uint16_t |
| #define int16_t efi_int16_t |
| #define uint8_t efi_uint8_t |
| #define int8_t efi_int8_t |
| |
| #undef NULL |
| #define uint64_t efi_uint64_t |
| #define int64_t efi_int64_t |
| #define uint32_t efi_uint32_t |
| #define int32_t efi_int32_t |
| #define uint16_t efi_uint16_t |
| #define int16_t efi_int16_t |
| #define uint8_t efi_uint8_t |
| #define int8_t efi_int8_t |
| |
| #include <efi.h> |
| #include <efilib.h> |
| |
| int |
| _relocate (long ldbase, ElfW(Dyn) *dyn, EFI_HANDLE image, EFI_SYSTEM_TABLE *systab) |
| { |
| extern EFI_STATUS efi_main (EFI_HANDLE, EFI_SYSTEM_TABLE *); |
| long relsz = 0, relent = 0; |
| ElfW(Rel) *rel = 0; |
| int i; |
| |
| for (i = 0; dyn[i].d_tag != DT_NULL; ++i) { |
| switch (dyn[i].d_tag) { |
| case DT_REL: |
| rel = (ElfW(Rel)*) ((long) dyn[i].d_un.d_ptr + ldbase); |
| break; |
| |
| case DT_RELSZ: |
| relsz = dyn[i].d_un.d_val; |
| break; |
| |
| case DT_RELENT: |
| relent = dyn[i].d_un.d_val; |
| break; |
| |
| case DT_RELA: |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| while (relsz > 0) { |
| if (!rel || relent == 0) |
| return EFI_LOAD_ERROR; |
| |
| /* apply the relocs */ |
| switch (ELF32_R_TYPE (rel->r_info)) { |
| case R_386_NONE: |
| break; |
| |
| case R_386_RELATIVE: |
| { |
| long *addr; |
| |
| addr = (long *) (ldbase + rel->r_offset); |
| *addr += ldbase; |
| break; |
| } |
| |
| default: |
| return EFI_LOAD_ERROR; |
| } |
| rel = (ElfW(Rel)*) ((char *) rel + relent); |
| relsz -= relent; |
| } |
| return EFI_SUCCESS; |
| } |