diff options
Diffstat (limited to 'roms/u-boot/arch/x86/lib/reloc_x86_64_efi.c')
| -rw-r--r-- | roms/u-boot/arch/x86/lib/reloc_x86_64_efi.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/roms/u-boot/arch/x86/lib/reloc_x86_64_efi.c b/roms/u-boot/arch/x86/lib/reloc_x86_64_efi.c new file mode 100644 index 000000000..2694de711 --- /dev/null +++ b/roms/u-boot/arch/x86/lib/reloc_x86_64_efi.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: BSD-3-Clause +/* + * reloc_x86_64.c - position independent x86_64 ELF shared object relocator + * Copyright (C) 1999 Hewlett-Packard Co. + * Contributed by David Mosberger <davidm@hpl.hp.com>. + * Copyright (C) 2005 Intel Co. + * Contributed by Fenghua Yu <fenghua.yu@intel.com>. + * + * All rights reserved. + */ + +#include <common.h> +#include <efi.h> +#include <elf.h> + +efi_status_t EFIAPI _relocate(long ldbase, Elf64_Dyn *dyn) +{ + long relsz = 0, relent = 0; + Elf64_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_RELA: + rel = (Elf64_Rel *) + ((unsigned long)dyn[i].d_un.d_ptr + ldbase); + break; + case DT_RELASZ: + relsz = dyn[i].d_un.d_val; + break; + case DT_RELAENT: + relent = dyn[i].d_un.d_val; + 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 (ELF64_R_TYPE(rel->r_info)) { + case R_X86_64_NONE: + break; + case R_X86_64_RELATIVE: + addr = (unsigned long *)(ldbase + rel->r_offset); + *addr += ldbase; + break; + default: + break; + } + rel = (Elf64_Rel *)((char *)rel + relent); + relsz -= relent; + } + + return EFI_SUCCESS; +} |