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/* * Various assembly language/system dependent hacks that are required * so that we can minimize the amount of platform specific code. * Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org> * Copyright (C) 2017-2018 by Waldemar Brodkorb <wbx@uclibc-ng.org> * Ported from GNU C Library * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ /* Copyright (C) 1995-2017 Free Software Foundation, Inc. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ /* Define this if the system uses RELOCA. */ #define ELF_USES_RELOCA #include <elf.h> #include <link.h> /* Initialization sequence for the GOT. */ #define INIT_GOT(GOT_BASE,MODULE) \ { \ GOT_BASE[2] = (unsigned long) _dl_linux_resolve; \ GOT_BASE[1] = (unsigned long) MODULE; \ } /* Here we define the magic numbers that this dynamic loader should accept */ #define MAGIC1 EM_AARCH64 #undef MAGIC2 /* Used for error messages */ #define ELF_TARGET "aarch64" struct elf_resolve; unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry); #define elf_machine_type_class(type) \ ((((type) == R_AARCH64_JUMP_SLOT \ || (type) == R_AARCH64_TLS_DTPMOD \ || (type) == R_AARCH64_TLS_DTPREL \ || (type) == R_AARCH64_TLS_TPREL \ || (type) == R_AARCH64_TLSDESC) * ELF_RTYPE_CLASS_PLT) \ | (((type) == R_AARCH64_COPY) * ELF_RTYPE_CLASS_COPY)) /* Return the link-time address of _DYNAMIC. Conveniently, this is the first element of the GOT. */ extern const ElfW(Addr) _GLOBAL_OFFSET_TABLE_[] attribute_hidden; static __always_inline ElfW(Addr) __attribute__ ((unused)) elf_machine_dynamic (void) { return _GLOBAL_OFFSET_TABLE_[0]; } /* Return the run-time load address of the shared object. */ static __always_inline ElfW(Addr) __attribute__ ((unused)) elf_machine_load_address (void) { /* To figure out the load address we use the definition that for any symbol: dynamic_addr(symbol) = static_addr(symbol) + load_addr _DYNAMIC sysmbol is used here as its link-time address stored in the special unrelocated first GOT entry. */ extern ElfW(Dyn) _DYNAMIC[] attribute_hidden; return (ElfW(Addr)) &_DYNAMIC - elf_machine_dynamic (); } static __always_inline void elf_machine_relative(Elf64_Addr load_off, const Elf64_Addr rel_addr, Elf64_Word relative_count) { Elf64_Rela *rpnt = (Elf64_Rela*)rel_addr; --rpnt; do { Elf64_Addr *const reloc_addr = (Elf64_Addr*)(load_off + (++rpnt)->r_offset); *reloc_addr = load_off + rpnt->r_addend; } while (--relative_count); } |