Add support for RISC-V architecture.

bfd	* Makefile.am: Add entries for riscv32-elf and riscv64-elf.
	* config.bdf: Likewise.
	* configure.ac: Likewise.
	* Makefile.in: Regenerate.
	* configure: Regenerate.
	* archures.c: Add bfd_riscv_arch.
	* reloc.c: Add riscv relocs.
	* targets.c: Add riscv_elf32_vec and riscv_elf64_vec.
	* bfd-in2.h: Regenerate.
	* libbfd.h: Regenerate.
	* elf-bfd.h: Add RISCV_ELF_DATA to enum elf_target_id.
	* elfnn-riscv.c: New file.
	* elfxx-riscv.c: New file.
	* elfxx-riscv.h: New file.

binutils* readelf.c (guess_is_rela): Add EM_RISCV.
	(get_machine_name): Likewise.
	(dump_relocations): Add support for riscv relocations.
	(get_machine_flags): Add support for riscv flags.
	(is_32bit_abs_reloc): Add R_RISCV_32.
	(is_64bit_abs_reloc): Add R_RISCV_64.
	(is_none_reloc): Add R_RISCV_NONE.
	* testsuite/binutils-all/objdump.exp (cpus_expected): Add riscv.
	Expect the debug_ranges test to fail.

gas	* Makefile.am: Add riscv files.
	* Makefile.in: Regenerate.
	* NEWS: Mention the support for this architecture.
	* configure.in: Define a default architecture.
	* configure: Regenerate.
	* configure.tgt: Add entries for riscv.
	* doc/as.texinfo: Likewise.
	* testsuite/gas/all/gas.exp: Expect the redef tests to fail.
	* testsuite/gas/elf/elf.exp: Expect the groupauto tests to fail.
	* config/tc-riscv.c: New file.
	* config/tc-riscv.h: New file.
	* doc/c-riscv.texi: New file.
	* testsuite/gas/riscv: New directory.
	* testsuite/gas/riscv/riscv.exp: New file.
	* testsuite/gas/riscv/t_insns.d: New file.
	* testsuite/gas/riscv/t_insns.s: New file.

ld	* Makefile.am: Add riscv files.
	* Makefile.in: Regenerate.
	* NEWS: Mention the support for this target.
	* configure.tgt: Add riscv entries.
	* emulparams/elf32lriscv-defs.sh: New file.
	* emulparams/elf32lriscv.sh: New file.
	* emulparams/elf64lriscv-defs.sh: New file.
	* emulparams/elf64lriscv.sh: New file.
	* emultempl/riscvelf.em: New file.

opcodes	* configure.ac: Add entry for bfd_riscv_arch.
	* configure: Regenerate.
	* disassemble.c (disassembler): Add support for riscv.
	(disassembler_usage): Likewise.
	* riscv-dis.c: New file.
	* riscv-opc.c: New file.

include	* dis-asm.h: Add prototypes for print_insn_riscv and
	print_riscv_disassembler_options.
	* elf/riscv.h: New file.
	* opcode/riscv-opc.h: New file.
	* opcode/riscv.h: New file.

1 files changed, 92 insertions, 0 deletions

diff --git a/include/elf/riscv.h b/include/elf/riscv.h
new file mode 100644
index 0000000..8415659
--- /dev/null
+++ b/include/elf/riscv.h
@@ -0,0 +1,92 @@
+/* RISC-V ELF support for BFD.
+   Copyright 2011-2016 Free Software Foundation, Inc.
+
+   Contributed by Andrew Waterman (andrew@sifive.com).
+   Based on MIPS ELF support for BFD, by Ian Lance Taylor.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; see the file COPYING3. If not,
+   see <http://www.gnu.org/licenses/>.  */
+
+/* This file holds definitions specific to the RISCV ELF ABI.  Note
+   that most of this is not actually implemented by BFD.  */
+
+#ifndef _ELF_RISCV_H
+#define _ELF_RISCV_H
+
+#include "elf/reloc-macros.h"
+#include "libiberty.h"
+
+/* Relocation types.  */
+START_RELOC_NUMBERS (elf_riscv_reloc_type)
+  /* Relocation types used by the dynamic linker.  */
+  RELOC_NUMBER (R_RISCV_NONE, 0)
+  RELOC_NUMBER (R_RISCV_32, 1)
+  RELOC_NUMBER (R_RISCV_64, 2)
+  RELOC_NUMBER (R_RISCV_RELATIVE, 3)
+  RELOC_NUMBER (R_RISCV_COPY, 4)
+  RELOC_NUMBER (R_RISCV_JUMP_SLOT, 5)
+  RELOC_NUMBER (R_RISCV_TLS_DTPMOD32, 6)
+  RELOC_NUMBER (R_RISCV_TLS_DTPMOD64, 7)
+  RELOC_NUMBER (R_RISCV_TLS_DTPREL32, 8)
+  RELOC_NUMBER (R_RISCV_TLS_DTPREL64, 9)
+  RELOC_NUMBER (R_RISCV_TLS_TPREL32, 10)
+  RELOC_NUMBER (R_RISCV_TLS_TPREL64, 11)
+
+  /* Relocation types not used by the dynamic linker.  */
+  RELOC_NUMBER (R_RISCV_BRANCH, 16)
+  RELOC_NUMBER (R_RISCV_JAL, 17)
+  RELOC_NUMBER (R_RISCV_CALL, 18)
+  RELOC_NUMBER (R_RISCV_CALL_PLT, 19)
+  RELOC_NUMBER (R_RISCV_GOT_HI20, 20)
+  RELOC_NUMBER (R_RISCV_TLS_GOT_HI20, 21)
+  RELOC_NUMBER (R_RISCV_TLS_GD_HI20, 22)
+  RELOC_NUMBER (R_RISCV_PCREL_HI20, 23)
+  RELOC_NUMBER (R_RISCV_PCREL_LO12_I, 24)
+  RELOC_NUMBER (R_RISCV_PCREL_LO12_S, 25)
+  RELOC_NUMBER (R_RISCV_HI20, 26)
+  RELOC_NUMBER (R_RISCV_LO12_I, 27)
+  RELOC_NUMBER (R_RISCV_LO12_S, 28)
+  RELOC_NUMBER (R_RISCV_TPREL_HI20, 29)
+  RELOC_NUMBER (R_RISCV_TPREL_LO12_I, 30)
+  RELOC_NUMBER (R_RISCV_TPREL_LO12_S, 31)
+  RELOC_NUMBER (R_RISCV_TPREL_ADD, 32)
+  RELOC_NUMBER (R_RISCV_ADD8, 33)
+  RELOC_NUMBER (R_RISCV_ADD16, 34)
+  RELOC_NUMBER (R_RISCV_ADD32, 35)
+  RELOC_NUMBER (R_RISCV_ADD64, 36)
+  RELOC_NUMBER (R_RISCV_SUB8, 37)
+  RELOC_NUMBER (R_RISCV_SUB16, 38)
+  RELOC_NUMBER (R_RISCV_SUB32, 39)
+  RELOC_NUMBER (R_RISCV_SUB64, 40)
+  RELOC_NUMBER (R_RISCV_GNU_VTINHERIT, 41)
+  RELOC_NUMBER (R_RISCV_GNU_VTENTRY, 42)
+  RELOC_NUMBER (R_RISCV_ALIGN, 43)
+  RELOC_NUMBER (R_RISCV_RVC_BRANCH, 44)
+  RELOC_NUMBER (R_RISCV_RVC_JUMP, 45)
+  RELOC_NUMBER (R_RISCV_RVC_LUI, 46)
+  RELOC_NUMBER (R_RISCV_GPREL_I, 47)
+  RELOC_NUMBER (R_RISCV_GPREL_S, 48)
+END_RELOC_NUMBERS (R_RISCV_max)
+
+/* Processor specific flags for the ELF header e_flags field.  */
+
+/* File may contain compressed instructions.  */
+#define EF_RISCV_RVC 0x0001
+
+/* File uses the soft-float calling convention.  */
+#define EF_RISCV_SOFT_FLOAT 0x0002
+
+#endif /* _ELF_RISCV_H */