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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 link-time address of _DYNAMIC. */
static inline ElfW(Addr)
elf_machine_dynamic (void)
{
extern ElfW(Addr) _GLOBAL_OFFSET_TABLE_ __attribute__ ((visibility ("hidden")));
return _GLOBAL_OFFSET_TABLE_;
}
/* Return the run-time load address of the shared object. */
static __always_inline ElfW(Addr) __attribute__ ((unused))
elf_machine_load_address (void)
{
ElfW(Addr) load_addr;
__asm__ ("lla %0, _DYNAMIC" : "=r" (load_addr));
return load_addr - 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);
}
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