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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) 2019 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) 2011-2019 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
- <https://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_RISCV
- #undef MAGIC2
- /* Used for error messages */
- #define ELF_TARGET "RISC-V"
- struct elf_resolve;
- unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry);
- #define ELF_MACHINE_JMP_SLOT R_RISCV_JUMP_SLOT
- #define elf_machine_type_class(type) \
- ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \
- || (__WORDSIZE == 32 && (type) == R_RISCV_TLS_DTPREL32) \
- || (__WORDSIZE == 32 && (type) == R_RISCV_TLS_DTPMOD32) \
- || (__WORDSIZE == 32 && (type) == R_RISCV_TLS_TPREL32) \
- || (__WORDSIZE == 64 && (type) == R_RISCV_TLS_DTPREL64) \
- || (__WORDSIZE == 64 && (type) == R_RISCV_TLS_DTPMOD64) \
- || (__WORDSIZE == 64 && (type) == R_RISCV_TLS_TPREL64))) \
- | (ELF_RTYPE_CLASS_COPY * ((type) == R_RISCV_COPY)))
- /* Return the run-time load address of the shared object. */
- static inline ElfW(Addr)
- elf_machine_load_address (void)
- {
- extern const ElfW(Ehdr) __ehdr_start attribute_hidden;
- return (ElfW(Addr)) &__ehdr_start;
- }
- /* Return the link-time address of _DYNAMIC. */
- static inline ElfW(Addr)
- elf_machine_dynamic (void)
- {
- extern ElfW(Dyn) _DYNAMIC[] attribute_hidden;
- return (ElfW(Addr)) _DYNAMIC - elf_machine_load_address ();
- }
- 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);
- }
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