mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-15 17:28:15 +00:00
73 lines
1.3 KiB
C
73 lines
1.3 KiB
C
|
/*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <common.h>
|
||
|
|
#include <efi.h>
|
||
|
|
#include <elf.h>
|
||
|
|
#include <asm/elf.h>
|
||
|
|
|
||
|
|
efi_status_t _relocate(long ldbase, Elf32_Dyn *dyn, efi_handle_t image,
|
||
|
|
struct efi_system_table *systab)
|
||
|
|
{
|
||
|
|
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;
|
||
|
|
}
|