Add riscv64 elf header.

riscv64/ELF-riscv64.hex2

@@ -0,0 +1,68 @@
+### Copyright (C) 2016 Jeremiah Orians
+### Copyright (C) 2017 Jan Nieuwenhuizen <janneke@gnu.org>
+### This file is part of M2-Planet.
+###
+### M2-Planet 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.
+###
+### M2-Planet 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 M2-Planet.  If not, see <http://www.gnu.org/licenses/>.
+
+### 64 bit elf header in hex2
+### if you wish to use this header, you need to add :ELF_end to the end of your
+### M1 or hex2 files.
+
+## ELF Header
+
+:ELF_base
+7F 45 4C 46        ## e_ident[EI_MAG0-3] ELF's magic number
+
+02                 ## e_ident[EI_CLASS] Indicating 64 bit
+01                 ## e_ident[EI_DATA] Indicating little endianness
+01                 ## e_ident[EI_VERSION] Indicating original elf
+
+03                 ## e_ident[EI_OSABI] Set at 3 because FreeBSD is strict
+00                 ## e_ident[EI_ABIVERSION] Set at 0 because none cares
+
+00 00 00 00 00 00 00 ## e_ident[EI_PAD]
+02 00              ## e_type Indicating Executable
+F3 00              ## e_machine Indicating RISC-V
+01 00 00 00        ## e_version Indicating original elf
+
+&_start 00 00 00 00 ## e_entry Address of the entry point (Number of bytes this header is + Base Address)
+%ELF_program_headers>ELF_base 00 00 00 00 ## e_phoff Address of program header table
+00 00 00 00 00 00 00 00 ## e_shoff Address of section header table
+
+00 00 00 00        ## e_flags
+40 00              ## e_ehsize Indicating our 64 Byte header
+
+38 00              ## e_phentsize size of a program header table
+01 00              ## e_phnum number of entries in program table
+
+00 00              ## e_shentsize size of a section header table
+00 00              ## e_shnum number of entries in section table
+
+00 00              ## e_shstrndx index of the section names
+
+## Program Header
+:ELF_program_headers
+01 00 00 00             ## p_type
+07 00 00 00             ## ph_flags: PF-X|PF-W|PF-R = 7
+00 00 00 00 00 00 00 00 ## p_offset
+
+&ELF_base 00 00 00 00 ## p_vaddr
+&ELF_base 00 00 00 00 ## p_physaddr
+
+%ELF_end>ELF_base 00 00 00 00 ## p_filesz
+%ELF_end>ELF_base 00 00 00 00 ## p_memsz
+
+01 00 00 00 00 00 00 00 ## Required alignment
+
+:ELF_text

riscv64/riscv64_defs.M1

@@ -182,3 +182,36 @@ DEFINE RS2_T3  .0000C001
 DEFINE RS2_T4  .0000D001
 DEFINE RS2_T5  .0000E001
 DEFINE RS2_T6  .0000F001
+
+DEFINE RS2_X0  .00000000
+DEFINE RS2_X1  .00001000
+DEFINE RS2_X2  .00002000
+DEFINE RS2_X3  .00003000
+DEFINE RS2_X4  .00004000
+DEFINE RS2_X5  .00005000
+DEFINE RS2_X6  .00006000
+DEFINE RS2_X7  .00007000
+DEFINE RS2_X8  .00008000
+DEFINE RS2_X9  .00009000
+DEFINE RS2_X10 .0000A000
+DEFINE RS2_X11 .0000B000
+DEFINE RS2_X12 .0000C000
+DEFINE RS2_X13 .0000D000
+DEFINE RS2_X14 .0000E000
+DEFINE RS2_X15 .0000F000
+DEFINE RS2_X16 .00000001
+DEFINE RS2_X17 .00001001
+DEFINE RS2_X18 .00002001
+DEFINE RS2_X19 .00003001
+DEFINE RS2_X20 .00004001
+DEFINE RS2_X21 .00005001
+DEFINE RS2_X22 .00006001
+DEFINE RS2_X23 .00007001
+DEFINE RS2_X24 .00008001
+DEFINE RS2_X25 .00009001
+DEFINE RS2_X26 .0000A001
+DEFINE RS2_X27 .0000B001
+DEFINE RS2_X28 .0000C001
+DEFINE RS2_X29 .0000D001
+DEFINE RS2_X30 .0000E001
+DEFINE RS2_X31 .0000F001