ELF-arm.hex2
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Jan (janneke) Nieuwenhuizen
Jan Nieuwenhuizen
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### Copyright (C) 2016 Jeremiah Orians
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### Copyright (C) 2017 Jan Nieuwenhuizen <janneke@gnu.org>
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### This file is part of M2-Planet.
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###
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### M2-Planet is free software: you can redistribute it and/or modify
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### it under the terms of the GNU General Public License as published by
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### the Free Software Foundation, either version 3 of the License, or
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### (at your option) any later version.
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###
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### M2-Planet is distributed in the hope that it will be useful,
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### but WITHOUT ANY WARRANTY; without even the implied warranty of
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### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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### GNU General Public License for more details.
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###
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### You should have received a copy of the GNU General Public License
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### along with M2-Planet. If not, see <http://www.gnu.org/licenses/>.
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### stage0's hex2 format
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### !<label> 1 byte relative
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### $<label> 2 byte address
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### @<label> 2 byte relative
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### &<label> 4 byte address
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### %<label> 4 byte relative
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### if you wish to use this header, you need to add :ELF_end to the end of your
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### M1 or hex2 files.
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## ELF Header
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:ELF_base
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7F 45 4C 46 # e_ident[EI_MAG0-3] ELF's magic number
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01 # e_ident[EI_CLASS] Indicating 32 bit
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01 # e_ident[EI_DATA] Indicating little endianness
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01 # e_ident[EI_VERSION] Indicating original elf
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03 # e_ident[EI_OSABI] Set at 3 because FreeBSD is strict
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00 # e_ident[EI_ABIVERSION] See above
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00 00 00 00 00 00 00 # e_ident[EI_PAD]
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02 00 # e_type Indicating Executable
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28 00 # e_machine Indicating 32bit ARM
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01 00 00 00 # e_version Indicating original elf
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&_start # e_entry Address of the entry point
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%ELF_program_headers>ELF_base # e_phoff Address of program header table
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%ELF_section_headers>ELF_base # e_shoff Address of section header table
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00 02 00 05 # e_flags
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34 00 # e_ehsize Indicating our 52 Byte header
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20 00 # e_phentsize size of a program header table
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01 00 # e_phnum number of entries in program table
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28 00 # e_shentsize size of a section header table
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05 00 # e_shnum number of entries in section table
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02 00 # e_shstrndx index of the section names
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:ELF_program_headers
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:ELF_program_header__text
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01 00 00 00 # ph_type: PT-LOAD = 1
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00 00 00 00 # ph_offset
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&ELF_base # ph_vaddr
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&ELF_base # ph_physaddr
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%ELF_end>ELF_base # ph_filesz
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%ELF_end>ELF_base # ph_memsz
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07 00 00 00 # ph_flags: PF-X|PF-W|PF-R = 7
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00 00 01 00 # ph_alignment
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:ELF_text
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## Copyright (C) 2016 Jeremiah Orians
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## This file is part of stage0.
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##
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## stage0 is free software: you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## stage0 is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with stage0. If not, see <http://www.gnu.org/licenses/>.
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# M2-Planet standards
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DEFINE NULL 00000000
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# Registers
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DEFINE R0 0
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DEFINE R1 1
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DEFINE R2 2
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DEFINE R3 3
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DEFINE R4 4
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DEFINE R5 5
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DEFINE R6 6
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DEFINE R7 7
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DEFINE R8 8
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DEFINE R9 9
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DEFINE R10 A
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DEFINE R11 B
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DEFINE R12 C
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DEFINE BP C
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DEFINE R13 D
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DEFINE SP D
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DEFINE R14 E
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DEFINE LR E
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DEFINE R15 F
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DEFINE PC F
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# Register masks for push/pop16
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DEFINE {R0} 0100
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DEFINE {R1} 0200
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DEFINE {R2} 0400
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DEFINE {R3} 0800
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DEFINE {R4} 1000
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DEFINE {R11} 0008
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DEFINE {BP} 0010
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DEFINE {LR} 0040
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# Bitshift constants
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DEFINE NO_SHIFT 0
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DEFINE LEFT 1
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DEFINE RIGHT 3
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DEFINE ARITH_RIGHT 5
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# LOAD/STORE
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DEFINE MEMORY E5
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DEFINE STORE32 08
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DEFINE STORE8 0C
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DEFINE LOAD32 09
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DEFINE LOAD8 0D
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DEFINE LOADI8_ALWAYS 0A0E3
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DEFINE LOADI8_G 0A0C3
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DEFINE LOADI8_GE 0A0A3
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DEFINE LOADI8_EQUAL 0A003
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DEFINE LOADI8_NE 0A013
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DEFINE LOADI8_LE 0A0D3
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DEFINE LOADI8_L 0A0B3
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DEFINE LOADI8_HI 0A083
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DEFINE LOADI8_HS 0A023
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DEFINE LOADI8_LS 0A093
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DEFINE LOADI8_LO 0A033
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# JUMP/BRANCH
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DEFINE JUMP_ALWAYS EA
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DEFINE JUMP_EQUAL 0A
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DEFINE JUMP_NE 1A
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DEFINE CALL_ALWAYS EB
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DEFINE CALL_REG_ALWAYS FF2FE1
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DEFINE RETURN FF2FE1
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# Data movement
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DEFINE MOVE_ALWAYS A0E1
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DEFINE MVN_ALWAYS 0E0E1
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DEFINE MVN_LT 0E0B1
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DEFINE MVNI8_EQUAL 0E003
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DEFINE PUSH_ALWAYS 2DE9
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DEFINE POP_ALWAYS BDE8
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# Arithmetic/logic
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DEFINE AUX_ALWAYS E1
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DEFINE IMM_ALWAYS E3
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DEFINE ARITH_ALWAYS E2
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DEFINE ARITH_GE A2
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DEFINE ARITH_LT B2
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DEFINE ARITH_NE 12
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DEFINE ARITH2_ALWAYS E0
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DEFINE ARITH2_GE A0
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DEFINE ADC 0A
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DEFINE ADCS 0B
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DEFINE ADD 08
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DEFINE ADDS 09
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DEFINE AND 00
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DEFINE CMP 005
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DEFINE CMPI8 005
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DEFINE MUL 0
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DEFINE MULS 1
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DEFINE OR 08
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DEFINE SHIFT A0
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DEFINE SUB 04
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DEFINE RSUB 06
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DEFINE XOR 02
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# SYSCALL
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DEFINE SYSCALL_ALWAYS 000000EF
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