/* $NetBSD: reloc_x86_64.c,v 1.1.1.2 2018/08/16 18:17:47 jmcneill Exp $ */ /* reloc_x86_64.c - position independent x86_64 ELF shared object relocator Copyright (C) 1999 Hewlett-Packard Co. Contributed by David Mosberger . Copyright (C) 2005 Intel Co. Contributed by Fenghua Yu . All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of Hewlett-Packard Co. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include EFI_STATUS _relocate (long ldbase, Elf64_Dyn *dyn, EFI_HANDLE image EFI_UNUSED, EFI_SYSTEM_TABLE *systab EFI_UNUSED) { 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; }