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/* 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;
}
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