diff options
author | Stefano Babic <sbabic@denx.de> | 2016-11-29 16:28:28 +0100 |
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committer | Stefano Babic <sbabic@denx.de> | 2016-11-29 16:28:28 +0100 |
commit | 2d221489df021393654805536be7effcb9d39702 (patch) | |
tree | 1b636f10b4ccde42624ec665df13288408b59b7f /arch/x86/lib/reloc_ia32_efi.c | |
parent | 45a3ad81fafe3090f7f89b458f6bd9f547a453df (diff) | |
parent | e94793c844a40606252f2e3f6428063e057b3fd2 (diff) |
Merge branch 'master' of git://git.denx.de/u-boot
Signed-off-by: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'arch/x86/lib/reloc_ia32_efi.c')
-rw-r--r-- | arch/x86/lib/reloc_ia32_efi.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/x86/lib/reloc_ia32_efi.c b/arch/x86/lib/reloc_ia32_efi.c new file mode 100644 index 0000000000..4d6825515d --- /dev/null +++ b/arch/x86/lib/reloc_ia32_efi.c @@ -0,0 +1,72 @@ +/* + * 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; +} |