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// SPDX-License-Identifier: BSD-3-Clause
/*
* reloc_ia32.c - position independent x86 ELF shared object relocator
* Copyright (C) 1999 Hewlett-Packard Co.
* Contributed by David Mosberger <davidm@hpl.hp.com>.
*
* All rights reserved.
*/
#include <common.h>
#include <efi.h>
#include <elf.h>
efi_status_t EFIAPI _relocate(long ldbase, Elf32_Dyn *dyn)
{
long relsz = 0, relent = 0;
Elf32_Rel *rel = 0;
unsigned long *addr;
int i;
for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
switch (dyn[i].d_tag) {
case DT_REL:
rel = (Elf32_Rel *)((unsigned 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;
}
}
if (!rel && relent == 0)
return EFI_SUCCESS;
if (!rel || relent == 0)
return EFI_LOAD_ERROR;
while (relsz > 0) {
/* apply the relocs */
switch (ELF32_R_TYPE(rel->r_info)) {
case R_386_NONE:
break;
case R_386_RELATIVE:
addr = (unsigned long *)(ldbase + rel->r_offset);
*addr += ldbase;
break;
default:
break;
}
rel = (Elf32_Rel *)((char *)rel + relent);
relsz -= relent;
}
return EFI_SUCCESS;
}
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