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- ### Copyright (C) 2016 Jeremiah Orians
- ### Copyright (C) 2017,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
- ###
- ### This file is part of GNU Mes.
- ###
- ### GNU Mes 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.
- ###
- ### GNU Mes 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
- ### Commentary:
- # elf32-header.hex2: 32 bit elf header in hex2, with text segment, data
- # segment and symbol tables.
- # stage0's hex2 format for x86
- # !<label> 1 byte relative
- # $<label> 2 byte address
- # @<label> 2 byte relative
- # &<label> 4 byte address
- # %<label> 4 byte relative
- # local_<label> function-local
- # string_<index> string #<index>
- ### Code:
- :ELF_base
- 7F 45 4C 46 # e_ident[EI_MAG0-3] ELF's magic number
- 01 # e_ident[EI_CLASS] Indicating 32 bit
- 01 # e_ident[EI_DATA] Indicating little endianness
- 01 # e_ident[EI_VERSION] Indicating original elf
- 00 # e_ident[EI_OSABI] Set at 0 because none cares
- 00 # e_ident[EI_ABIVERSION] See above
- 00 00 00 00 00 00 00 # e_ident[EI_PAD]
- 02 00 # e_type Indicating Executable
- 03 00 # e_machine Indicating 32bit x86
- 01 00 00 00 # e_version Indicating original elf
- &ELF_text # e_entry Address of the entry point
- %ELF_program_headers>ELF_base # e_phoff Address of program header table
- %ELF_section_headers>ELF_base # e_shoff Address of section header table
- 00 00 00 00 # e_flags
- 34 00 # e_ehsize Indicating our 52 Byte header
- 20 00 # e_phentsize size of a program header table
- 01 00 # e_phnum number of entries in program table
- 28 00 # e_shentsize size of a section header table
- 07 00 # e_shnum number of entries in section table
- 04 00 # e_shstrndx index of the section names
- # @34
- 00 00 00 00
- 00 00 00 00
- 00 00 00 00
- # @40
- :ELF_program_headers
- :ELF_program_header__text
- 01 00 00 00 # ph_type: PT-LOAD = 1
- 00 00 00 00 # ph_offset
- &ELF_base # ph_vaddr
- &ELF_base # ph_physaddr
- %ELF_end>ELF_base # ph_filesz
- %ELF_end>ELF_base # ph_memsz
- 07 00 00 00 # ph_flags: PF-X|PF-W|PF-R = 7
- 01 00 00 00 # ph_align
- # @60
- #:ELF_program_header__data # NOT USED
- # FIXME: linux 4.17 does not allow this overlap
- # Uhuuh, elf segment at 0000000001000000
- # requested but the memory is mapped already
- 01 00 00 00 # ph_type: PT-LOAD = 1
- 00 00 00 00 # ph_offset
- &ELF_base # ph_vaddr
- &ELF_base # ph_physaddr
- %ELF_end>ELF_base # ph_filesz
- %ELF_end>ELF_base # ph_memsz
- 07 00 00 00 # ph_flags: PF-X|PF-W|PF-R = 7
- 01 00 00 00 # ph_align
- # @80
- :ELF_comment
- 4d 45 53 00 # MES
- 00 00 00 00 # align
- 00 00 00 00
- 00 00 00 00
- 4d 45 53 00 # MES
- 00 00 00 00 # align
- 00 00 00 00
- 00 00 00 00
- # @a0
- :ELF_shstr
- 00
- :ELF_shstr__text
- 2e 74 65 78 74 00 # .text
- :ELF_shstr__data
- 2e 64 61 74 61 00 # .data
- :ELF_shstr__comment
- 2e 63 6f 6d 6d 65 6e 74 00 # .comment
- :ELF_shstr__shstr
- 2e 73 68 73 74 72 74 61 62 00 # .shstrtab
- :ELF_shstr__sym
- 2e 73 79 6d 74 61 62 00 # .symtab
- :ELF_shstr__str
- 2e 73 74 72 74 61 62 00 # .strtab
- # @d0
- :ELF_section_headers
- 00 00 00 00 # sh_name
- 00 00 00 00 # sh_type
- 00 00 00 00 # sh_flags
- 00 00 00 00 # sh_addr
- 00 00 00 00 # sh_offset
- 00 00 00 00 # sh_length
- 00 00 00 00 # sh_link
- 00 00 00 00 # sh_info
- 01 00 00 00 # sh_1?
- 00 00 00 00 # sh_entsize
- ## FIXME: M0 for calculations?
- :ELF_section_header_text
- %ELF_shstr__text>ELF_shstr # sh_name
- 01 00 00 00 # sh_type = SHT_PROGBITS = 1
- 06 00 00 00 # sh_flags = SHF-ALLOC|SHF-EXEC =2 | 4 = 6
- &ELF_text # sh_addr
- %ELF_text>ELF_base # sh_offset
- %ELF_data>ELF_text # sh_length
- 00 00 00 00 # sh_link
- 00 00 00 00 # sh_info
- 01 00 00 00 # sh_1?
- 00 00 00 00 # sh_entsize
- :ELF_section_header_data
- %ELF_shstr__data>ELF_shstr # sh_name
- 01 00 00 00 # sh_type = SHT_PROGBITS = 1
- 03 00 00 00 # sh_flags = SHF-WRITE|SHF-ALLOC = 1 | 2 = 3
- &ELF_data # sh_addr
- %ELF_data>ELF_base # sh_offset
- %ELF_sym>ELF_data # sh_length
- 00 00 00 00 # sh_link
- 00 00 00 00 # sh_info
- 01 00 00 00 # sh_1?
- 00 00 00 00 # sh_entsize
- :ELF_section_header_comment
- %ELF_shstr__comment>ELF_shstr # sh_name
- 01 00 00 00 # sh_type = SHT_PROGBITS = 1
- 00 00 00 00 # sh_flags
- &ELF_comment # sh_addr
- %ELF_comment>ELF_base # sh_offset
- %ELF_shstr>ELF_comment # sh_length
- 00 00 00 00 # sh_link
- 00 00 00 00 # sh_info
- 01 00 00 00 # sh_1?
- 00 00 00 00 # sh_entsize
- :ELF_section_header_shstr
- %ELF_shstr__shstr>ELF_shstr # sh_name
- 03 00 00 00 # sh_type: str-sht-strtab
- 00 00 00 00 # sh_flags
- &ELF_shstr # sh_addr
- %ELF_shstr>ELF_base # sh_offset
- %ELF_section_headers>ELF_shstr # sh_length
- 00 00 00 00 # sh_link
- 00 00 00 00 # sh_info
- 01 00 00 00 # sh_1?
- 00 00 00 00 # sh_entsize
- :ELF_section_header_sym
- %ELF_shstr__sym>ELF_shstr # sh_name
- 02 00 00 00 # sh_type: str-sht-symtab
- 00 00 00 00 # sh_flags
- &ELF_sym # sh_addr
- %ELF_sym>ELF_base # sh_offset
- %ELF_end>ELF_sym # sh_length
- 06 00 00 00 # sh_link:6
- 00 00 00 00 # sh_info
- 01 00 00 00 # sh_1?
- 10 00 00 00 # sh_entsize
- :ELF_section_header_str
- %ELF_shstr__str>ELF_shstr # sh_name
- 03 00 00 00 # sh_type: str-sht-strtab
- 00 00 00 00 # sh_flags
- &ELF_str # sh_addr
- %ELF_str>ELF_base # sh_offset
- %ELF_sym>ELF_str # sh_length
- 00 00 00 00 # sh_link
- 00 00 00 00 # sh_info
- 01 00 00 00 # sh_1?
- 00 00 00 00 # sh_entsize
- # @1e8
- 00 00 00 00 # align
- 00 00 00 00
- # @1f0
- 00 00 00 00 # align
- 00 00 00 00
- 00 00 00 00
- 00 00 00 00
- # @200
- :ELF_text
|
