99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/* reloc_x86_64.c - position independent x86_64 ELF shared object relocator
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Copyright (C) 1999 Hewlett-Packard Co.
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Contributed by David Mosberger <davidm@hpl.hp.com>.
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Copyright (C) 2005 Intel Co.
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Contributed by Fenghua Yu <fenghua.yu@intel.com>.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials
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provided with the distribution.
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* Neither the name of Hewlett-Packard Co. nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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#include <efi.h>
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#include <efilib.h>
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#include "subst/elf.h"
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EFI_STATUS _relocate (long ldbase, Elf64_Dyn *dyn,
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EFI_HANDLE image EFI_UNUSED,
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EFI_SYSTEM_TABLE *systab EFI_UNUSED)
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{
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long relsz = 0, relent = 0;
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Elf64_Rela *rel = 0;
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unsigned long *addr;
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int i;
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for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
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switch (dyn[i].d_tag) {
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case DT_RELA:
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rel = (Elf64_Rela*)
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((unsigned long)dyn[i].d_un.d_ptr
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+ ldbase);
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break;
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case DT_RELASZ:
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relsz = dyn[i].d_un.d_val;
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break;
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case DT_RELAENT:
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relent = dyn[i].d_un.d_val;
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break;
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default:
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break;
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}
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}
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if (!rel && relent == 0)
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return EFI_SUCCESS;
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if (!rel || relent == 0)
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return EFI_LOAD_ERROR;
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while (relsz > 0) {
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/* apply the relocs */
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switch (ELF64_R_TYPE (rel->r_info)) {
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case R_X86_64_NONE:
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break;
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case R_X86_64_RELATIVE:
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addr = (unsigned long *)
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(ldbase + rel->r_offset);
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*addr = ldbase + rel->r_addend;
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break;
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default:
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break;
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}
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rel = (Elf64_Rela*) ((char *) rel + relent);
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relsz -= relent;
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}
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return EFI_SUCCESS;
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}
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