exec-hello-world.py

import os


def main() -> None:
    contents = bytearray(0x2220)

    # >>>>>>>> ELF HEADER <<<<<<<<

    # e_ident[EI_MAG0..=EI_MAG3]
    contents[0x0000] = 0x7f
    contents[0x0001] = 0x45
    contents[0x0002] = 0x4c
    contents[0x0003] = 0x46

    # e_ident[EI_CLASS]
    contents[0x0004] = 0x02

    # e_ident[EI_DATA]
    contents[0x0005] = 0x01

    # e_ident[EI_VERSION]
    contents[0x0006] = 0x01

    # e_ident[EI_OSABI]
    contents[0x0007] = 0x00

    # e_ident[EI_ABIVERSION]
    contents[0x0008] = 0x00

    # e_ident[EI_PAD..EI_NIDENT]
    contents[0x0009] = 0x00
    contents[0x000a] = 0x00
    contents[0x000b] = 0x00
    contents[0x000c] = 0x00
    contents[0x000d] = 0x00
    contents[0x000e] = 0x00
    contents[0x000f] = 0x00

    # e_type
    contents[0x0010] = 0x02
    contents[0x0011] = 0x00

    # e_machine
    contents[0x0012] = 0x3e
    contents[0x0013] = 0x00

    # e_version
    contents[0x0014] = 0x01
    contents[0x0015] = 0x00
    contents[0x0016] = 0x00
    contents[0x0017] = 0x00

    # e_entry
    contents[0x0018] = 0x00
    contents[0x0019] = 0x10
    contents[0x001a] = 0x40
    contents[0x001b] = 0x00
    contents[0x001c] = 0x00
    contents[0x001d] = 0x00
    contents[0x001e] = 0x00
    contents[0x001f] = 0x00

    # e_phoff
    contents[0x0020] = 0x40
    contents[0x0021] = 0x00
    contents[0x0022] = 0x00
    contents[0x0023] = 0x00
    contents[0x0024] = 0x00
    contents[0x0025] = 0x00
    contents[0x0026] = 0x00
    contents[0x0027] = 0x00

    # e_shoff
    contents[0x0028] = 0xa0
    contents[0x0029] = 0x20
    contents[0x002a] = 0x00
    contents[0x002b] = 0x00
    contents[0x002c] = 0x00
    contents[0x002d] = 0x00
    contents[0x002e] = 0x00
    contents[0x002f] = 0x00

    # e_flags
    contents[0x0030] = 0x00
    contents[0x0031] = 0x00
    contents[0x0032] = 0x00
    contents[0x0033] = 0x00

    # e_ehsize
    contents[0x0034] = 0x40
    contents[0x0035] = 0x00

    # e_phentsize
    contents[0x0036] = 0x38
    contents[0x0037] = 0x00

    # e_phnum
    contents[0x0038] = 0x03
    contents[0x0039] = 0x00

    # e_shentsize
    contents[0x003a] = 0x40
    contents[0x003b] = 0x00

    # e_shnum
    contents[0x003c] = 0x06
    contents[0x003d] = 0x00

    # e_shstrndx
    contents[0x003e] = 0x05
    contents[0x003f] = 0x00

    # >>>>>>>> PROGRAM HEADER TABLE <<<<<<<<

    # ELF and program headers

    # p_type
    contents[0x0040] = 0x01
    contents[0x0041] = 0x00
    contents[0x0042] = 0x00
    contents[0x0043] = 0x00

    # p_flags
    contents[0x0044] = 0x04
    contents[0x0045] = 0x00
    contents[0x0046] = 0x00
    contents[0x0047] = 0x00

    # p_offset
    contents[0x0048] = 0x00
    contents[0x0049] = 0x00
    contents[0x004a] = 0x00
    contents[0x004b] = 0x00
    contents[0x004c] = 0x00
    contents[0x004d] = 0x00
    contents[0x004e] = 0x00
    contents[0x004f] = 0x00

    # p_vaddr
    contents[0x0050] = 0x00
    contents[0x0051] = 0x00
    contents[0x0052] = 0x40
    contents[0x0053] = 0x00
    contents[0x0054] = 0x00
    contents[0x0055] = 0x00
    contents[0x0056] = 0x00
    contents[0x0057] = 0x00

    # p_paddr
    contents[0x0058] = 0x00
    contents[0x0059] = 0x00
    contents[0x005a] = 0x00
    contents[0x005b] = 0x00
    contents[0x005c] = 0x00
    contents[0x005d] = 0x00
    contents[0x005e] = 0x00
    contents[0x005f] = 0x00

    # p_filesz
    contents[0x0060] = 0xe8
    contents[0x0061] = 0x00
    contents[0x0062] = 0x00
    contents[0x0063] = 0x00
    contents[0x0064] = 0x00
    contents[0x0065] = 0x00
    contents[0x0066] = 0x00
    contents[0x0067] = 0x00

    # p_memsz
    contents[0x0068] = 0xe8
    contents[0x0069] = 0x00
    contents[0x006a] = 0x00
    contents[0x006b] = 0x00
    contents[0x006c] = 0x00
    contents[0x006d] = 0x00
    contents[0x006e] = 0x00
    contents[0x006f] = 0x00

    # p_align
    contents[0x0070] = 0x00
    contents[0x0071] = 0x10
    contents[0x0072] = 0x00
    contents[0x0073] = 0x00
    contents[0x0074] = 0x00
    contents[0x0075] = 0x00
    contents[0x0076] = 0x00
    contents[0x0077] = 0x00

    # ========================

    # Code

    # p_type
    contents[0x0078] = 0x01
    contents[0x0079] = 0x00
    contents[0x007a] = 0x00
    contents[0x007b] = 0x00

    # p_flags
    contents[0x007c] = 0x05
    contents[0x007d] = 0x00
    contents[0x007e] = 0x00
    contents[0x007f] = 0x00

    # p_offset
    contents[0x0080] = 0x00
    contents[0x0081] = 0x10
    contents[0x0082] = 0x00
    contents[0x0083] = 0x00
    contents[0x0084] = 0x00
    contents[0x0085] = 0x00
    contents[0x0086] = 0x00
    contents[0x0087] = 0x00

    # p_vaddr
    contents[0x0088] = 0x00
    contents[0x0089] = 0x10
    contents[0x008a] = 0x40
    contents[0x008b] = 0x00
    contents[0x008c] = 0x00
    contents[0x008d] = 0x00
    contents[0x008e] = 0x00
    contents[0x008f] = 0x00

    # p_paddr
    contents[0x0090] = 0x00
    contents[0x0091] = 0x00
    contents[0x0092] = 0x00
    contents[0x0093] = 0x00
    contents[0x0094] = 0x00
    contents[0x0095] = 0x00
    contents[0x0096] = 0x00
    contents[0x0097] = 0x00

    # p_filesz
    contents[0x0098] = 0x26
    contents[0x0099] = 0x00
    contents[0x009a] = 0x00
    contents[0x009b] = 0x00
    contents[0x009c] = 0x00
    contents[0x009d] = 0x00
    contents[0x009e] = 0x00
    contents[0x009f] = 0x00

    # p_memsz
    contents[0x00a0] = 0x26
    contents[0x00a1] = 0x00
    contents[0x00a2] = 0x00
    contents[0x00a3] = 0x00
    contents[0x00a4] = 0x00
    contents[0x00a5] = 0x00
    contents[0x00a6] = 0x00
    contents[0x00a7] = 0x00

    # p_align
    contents[0x00a8] = 0x00
    contents[0x00a9] = 0x10
    contents[0x00aa] = 0x00
    contents[0x00ab] = 0x00
    contents[0x00ac] = 0x00
    contents[0x00ad] = 0x00
    contents[0x00ae] = 0x00
    contents[0x00af] = 0x00

    # ========================

    # Read-only data

    # p_type
    contents[0x00b0] = 0x01
    contents[0x00b1] = 0x00
    contents[0x00b2] = 0x00
    contents[0x00b3] = 0x00

    # p_flags
    contents[0x00b4] = 0x04
    contents[0x00b5] = 0x00
    contents[0x00b6] = 0x00
    contents[0x00b7] = 0x00

    # p_offset
    contents[0x00b8] = 0x00
    contents[0x00b9] = 0x20
    contents[0x00ba] = 0x00
    contents[0x00bb] = 0x00
    contents[0x00bc] = 0x00
    contents[0x00bd] = 0x00
    contents[0x00be] = 0x00
    contents[0x00bf] = 0x00

    # p_vaddr
    contents[0x00c0] = 0x00
    contents[0x00c1] = 0x20
    contents[0x00c2] = 0x40
    contents[0x00c3] = 0x00
    contents[0x00c4] = 0x00
    contents[0x00c5] = 0x00
    contents[0x00c6] = 0x00
    contents[0x00c7] = 0x00

    # p_paddr
    contents[0x00c8] = 0x00
    contents[0x00c9] = 0x00
    contents[0x00ca] = 0x00
    contents[0x00cb] = 0x00
    contents[0x00cc] = 0x00
    contents[0x00cd] = 0x00
    contents[0x00ce] = 0x00
    contents[0x00cf] = 0x00

    # p_filesz
    contents[0x00d0] = 0x0c
    contents[0x00d1] = 0x00
    contents[0x00d2] = 0x00
    contents[0x00d3] = 0x00
    contents[0x00d4] = 0x00
    contents[0x00d5] = 0x00
    contents[0x00d6] = 0x00
    contents[0x00d7] = 0x00

    # p_memsz
    contents[0x00d8] = 0x0c
    contents[0x00d9] = 0x00
    contents[0x00da] = 0x00
    contents[0x00db] = 0x00
    contents[0x00dc] = 0x00
    contents[0x00dd] = 0x00
    contents[0x00de] = 0x00
    contents[0x00df] = 0x00

    # p_align
    contents[0x00e0] = 0x00
    contents[0x00e1] = 0x10
    contents[0x00e2] = 0x00
    contents[0x00e3] = 0x00
    contents[0x00e4] = 0x00
    contents[0x00e5] = 0x00
    contents[0x00e6] = 0x00
    contents[0x00e7] = 0x00

    # >>>>>>>> CODE <<<<<<<<

    # _start:

    # mov eax, 0x01
    contents[0x1000] = 0xb8
    contents[0x1001] = 0x01
    contents[0x1002] = 0x00
    contents[0x1003] = 0x00
    contents[0x1004] = 0x00

    # mov edi, 0x01
    contents[0x1005] = 0xbf
    contents[0x1006] = 0x01
    contents[0x1007] = 0x00
    contents[0x1008] = 0x00
    contents[0x1009] = 0x00

    # lea rsi, [rip + string]
    contents[0x100a] = 0x48
    contents[0x100b] = 0x8d
    contents[0x100c] = 0x35
    contents[0x100d] = 0xef
    contents[0x100e] = 0x0f
    contents[0x100f] = 0x00
    contents[0x1010] = 0x00

    # mov rdx, 0x0c
    contents[0x1011] = 0x48
    contents[0x1012] = 0xc7
    contents[0x1013] = 0xc2
    contents[0x1014] = 0x0c
    contents[0x1015] = 0x00
    contents[0x1016] = 0x00
    contents[0x1017] = 0x00

    # syscall
    contents[0x1018] = 0x0f
    contents[0x1019] = 0x05

    # mov eax, 0x3c
    contents[0x101a] = 0xb8
    contents[0x101b] = 0x3c
    contents[0x101c] = 0x00
    contents[0x101d] = 0x00
    contents[0x101e] = 0x00

    # mov edi, 0x00
    contents[0x101f] = 0xbf
    contents[0x1020] = 0x00
    contents[0x1021] = 0x00
    contents[0x1022] = 0x00
    contents[0x1023] = 0x00

    # syscall
    contents[0x1024] = 0x0f
    contents[0x1025] = 0x05

    # >>>>>>>> DATA <<<<<<<<

    # string

    # "hello world\n"
    contents[0x2000] = 0x68
    contents[0x2001] = 0x65
    contents[0x2002] = 0x6c
    contents[0x2003] = 0x6c
    contents[0x2004] = 0x6f
    contents[0x2005] = 0x20
    contents[0x2006] = 0x77
    contents[0x2007] = 0x6f
    contents[0x2008] = 0x72
    contents[0x2009] = 0x6c
    contents[0x200a] = 0x64
    contents[0x200b] = 0x0a

    # >>>>>>>> SYMBOL TABLE <<<<<<<<

    # Null

    # st_name
    contents[0x2018] = 0x00
    contents[0x2019] = 0x00
    contents[0x201a] = 0x00
    contents[0x201b] = 0x00

    # st_info
    contents[0x201c] = 0x00

    # st_other
    contents[0x201d] = 0x00

    # st_shndx
    contents[0x201e] = 0x00
    contents[0x201f] = 0x00

    # st_value
    contents[0x2020] = 0x00
    contents[0x2021] = 0x00
    contents[0x2022] = 0x00
    contents[0x2023] = 0x00
    contents[0x2024] = 0x00
    contents[0x2025] = 0x00
    contents[0x2026] = 0x00
    contents[0x2027] = 0x00

    # st_size
    contents[0x2028] = 0x00
    contents[0x2029] = 0x00
    contents[0x202a] = 0x00
    contents[0x202b] = 0x00
    contents[0x202c] = 0x00
    contents[0x202d] = 0x00
    contents[0x202e] = 0x00
    contents[0x202f] = 0x00

    # ========================

    # string

    # st_name
    contents[0x2030] = 0x01
    contents[0x2031] = 0x00
    contents[0x2032] = 0x00
    contents[0x2033] = 0x00

    # st_info
    contents[0x2034] = 0x01

    # st_other
    contents[0x2035] = 0x00

    # st_shndx
    contents[0x2036] = 0x02
    contents[0x2037] = 0x00

    # st_value
    contents[0x2038] = 0x00
    contents[0x2039] = 0x20
    contents[0x203a] = 0x40
    contents[0x203b] = 0x00
    contents[0x203c] = 0x00
    contents[0x203d] = 0x00
    contents[0x203e] = 0x00
    contents[0x203f] = 0x00

    # st_size
    contents[0x2040] = 0x0c
    contents[0x2041] = 0x00
    contents[0x2042] = 0x00
    contents[0x2043] = 0x00
    contents[0x2044] = 0x00
    contents[0x2045] = 0x00
    contents[0x2046] = 0x00
    contents[0x2047] = 0x00

    # ========================

    # _start

    # st_name
    contents[0x2048] = 0x08
    contents[0x2049] = 0x00
    contents[0x204a] = 0x00
    contents[0x204b] = 0x00

    # st_info
    contents[0x204c] = 0x12

    # st_other
    contents[0x204d] = 0x00

    # st_shndx
    contents[0x204e] = 0x01
    contents[0x204f] = 0x00

    # st_value
    contents[0x2050] = 0x00
    contents[0x2051] = 0x10
    contents[0x2052] = 0x40
    contents[0x2053] = 0x00
    contents[0x2054] = 0x00
    contents[0x2055] = 0x00
    contents[0x2056] = 0x00
    contents[0x2057] = 0x00

    # st_size
    contents[0x2058] = 0x26
    contents[0x2059] = 0x00
    contents[0x205a] = 0x00
    contents[0x205b] = 0x00
    contents[0x205c] = 0x00
    contents[0x205d] = 0x00
    contents[0x205e] = 0x00
    contents[0x205f] = 0x00

    # >>>>>>>> STRING TABLE <<<<<<<<

    # "\0"
    contents[0x2060] = 0x00

    # "string\0"
    contents[0x2061] = 0x73
    contents[0x2062] = 0x74
    contents[0x2063] = 0x72
    contents[0x2064] = 0x69
    contents[0x2065] = 0x6e
    contents[0x2066] = 0x67
    contents[0x2067] = 0x00

    # "_start\0"
    contents[0x2068] = 0x5f
    contents[0x2069] = 0x73
    contents[0x206a] = 0x74
    contents[0x206b] = 0x61
    contents[0x206c] = 0x72
    contents[0x206d] = 0x74
    contents[0x206e] = 0x00

    # >>>>>>>> SECTION HEADER STRING TABLE <<<<<<<<

    # "\0"
    contents[0x2070] = 0x00

    # ".text\0"
    contents[0x2071] = 0x2e
    contents[0x2072] = 0x74
    contents[0x2073] = 0x65
    contents[0x2074] = 0x78
    contents[0x2075] = 0x74
    contents[0x2076] = 0x00

    # ".rodata\0"
    contents[0x2077] = 0x2e
    contents[0x2078] = 0x72
    contents[0x2079] = 0x6f
    contents[0x207a] = 0x64
    contents[0x207b] = 0x61
    contents[0x207c] = 0x74
    contents[0x207d] = 0x61
    contents[0x207e] = 0x00

    # ".symtab\0"
    contents[0x207f] = 0x2e
    contents[0x2080] = 0x73
    contents[0x2081] = 0x79
    contents[0x2082] = 0x6d
    contents[0x2083] = 0x74
    contents[0x2084] = 0x61
    contents[0x2085] = 0x62
    contents[0x2086] = 0x00

    # ".strtab\0"
    contents[0x2087] = 0x2e
    contents[0x2088] = 0x73
    contents[0x2089] = 0x74
    contents[0x208a] = 0x72
    contents[0x208b] = 0x74
    contents[0x208c] = 0x61
    contents[0x208d] = 0x62
    contents[0x208e] = 0x00

    # ".shstrtab\0"
    contents[0x208f] = 0x2e
    contents[0x2090] = 0x73
    contents[0x2091] = 0x68
    contents[0x2092] = 0x73
    contents[0x2093] = 0x74
    contents[0x2094] = 0x72
    contents[0x2095] = 0x74
    contents[0x2096] = 0x61
    contents[0x2097] = 0x62
    contents[0x2098] = 0x00

    # >>>>>>>>>> SECTION HEADER TABLE <<<<<<<<<<

    # Null

    # sh_name
    contents[0x20a0] = 0x00
    contents[0x20a1] = 0x00
    contents[0x20a2] = 0x00
    contents[0x20a3] = 0x00

    # sh_type
    contents[0x20a4] = 0x00
    contents[0x20a5] = 0x00
    contents[0x20a6] = 0x00
    contents[0x20a7] = 0x00

    # sh_flags
    contents[0x20a8] = 0x00
    contents[0x20a9] = 0x00
    contents[0x20aa] = 0x00
    contents[0x20ab] = 0x00
    contents[0x20ac] = 0x00
    contents[0x20ad] = 0x00
    contents[0x20ae] = 0x00
    contents[0x20af] = 0x00

    # sh_addr
    contents[0x20b0] = 0x00
    contents[0x20b1] = 0x00
    contents[0x20b2] = 0x00
    contents[0x20b3] = 0x00
    contents[0x20b4] = 0x00
    contents[0x20b5] = 0x00
    contents[0x20b6] = 0x00
    contents[0x20b7] = 0x00

    # sh_offset
    contents[0x20b8] = 0x00
    contents[0x20b9] = 0x00
    contents[0x20ba] = 0x00
    contents[0x20bb] = 0x00
    contents[0x20bc] = 0x00
    contents[0x20bd] = 0x00
    contents[0x20be] = 0x00
    contents[0x20bf] = 0x00

    # sh_size
    contents[0x20c0] = 0x00
    contents[0x20c1] = 0x00
    contents[0x20c2] = 0x00
    contents[0x20c3] = 0x00
    contents[0x20c4] = 0x00
    contents[0x20c5] = 0x00
    contents[0x20c6] = 0x00
    contents[0x20c7] = 0x00

    # sh_link
    contents[0x20c8] = 0x00
    contents[0x20c9] = 0x00
    contents[0x20ca] = 0x00
    contents[0x20cb] = 0x00

    # sh_info
    contents[0x20cc] = 0x00
    contents[0x20cd] = 0x00
    contents[0x20ce] = 0x00
    contents[0x20cf] = 0x00

    # sh_addralign
    contents[0x20d0] = 0x00
    contents[0x20d1] = 0x00
    contents[0x20d2] = 0x00
    contents[0x20d3] = 0x00
    contents[0x20d4] = 0x00
    contents[0x20d5] = 0x00
    contents[0x20d6] = 0x00
    contents[0x20d7] = 0x00

    # sh_entsize
    contents[0x20d8] = 0x00
    contents[0x20d9] = 0x00
    contents[0x20da] = 0x00
    contents[0x20db] = 0x00
    contents[0x20dc] = 0x00
    contents[0x20dd] = 0x00
    contents[0x20de] = 0x00
    contents[0x20df] = 0x00

    # ========================

    # .text

    # sh_name
    contents[0x20e0] = 0x01
    contents[0x20e1] = 0x00
    contents[0x20e2] = 0x00
    contents[0x20e3] = 0x00

    # sh_type
    contents[0x20e4] = 0x01
    contents[0x20e5] = 0x00
    contents[0x20e6] = 0x00
    contents[0x20e7] = 0x00

    # sh_flags
    contents[0x20e8] = 0x06
    contents[0x20e9] = 0x00
    contents[0x20ea] = 0x00
    contents[0x20eb] = 0x00
    contents[0x20ec] = 0x00
    contents[0x20ed] = 0x00
    contents[0x20ee] = 0x00
    contents[0x20ef] = 0x00

    # sh_addr
    contents[0x20f0] = 0x00
    contents[0x20f1] = 0x10
    contents[0x20f2] = 0x40
    contents[0x20f3] = 0x00
    contents[0x20f4] = 0x00
    contents[0x20f5] = 0x00
    contents[0x20f6] = 0x00
    contents[0x20f7] = 0x00

    # sh_offset
    contents[0x20f8] = 0x00
    contents[0x20f9] = 0x10
    contents[0x20fa] = 0x00
    contents[0x20fb] = 0x00
    contents[0x20fc] = 0x00
    contents[0x20fd] = 0x00
    contents[0x20fe] = 0x00
    contents[0x20ff] = 0x00

    # sh_size
    contents[0x2100] = 0x26
    contents[0x2101] = 0x00
    contents[0x2102] = 0x00
    contents[0x2103] = 0x00
    contents[0x2104] = 0x00
    contents[0x2105] = 0x00
    contents[0x2106] = 0x00
    contents[0x2107] = 0x00

    # sh_link
    contents[0x2108] = 0x00
    contents[0x2109] = 0x00
    contents[0x210a] = 0x00
    contents[0x210b] = 0x00

    # sh_info
    contents[0x210c] = 0x00
    contents[0x210d] = 0x00
    contents[0x210e] = 0x00
    contents[0x210f] = 0x00

    # sh_addralign
    contents[0x2110] = 0x10
    contents[0x2111] = 0x00
    contents[0x2112] = 0x00
    contents[0x2113] = 0x00
    contents[0x2114] = 0x00
    contents[0x2115] = 0x00
    contents[0x2116] = 0x00
    contents[0x2117] = 0x00

    # sh_entsize
    contents[0x2118] = 0x00
    contents[0x2119] = 0x00
    contents[0x211a] = 0x00
    contents[0x211b] = 0x00
    contents[0x211c] = 0x00
    contents[0x211d] = 0x00
    contents[0x211e] = 0x00
    contents[0x211f] = 0x00

    # ========================

    # .rodata

    # sh_name
    contents[0x2120] = 0x07
    contents[0x2121] = 0x00
    contents[0x2122] = 0x00
    contents[0x2123] = 0x00

    # sh_type
    contents[0x2124] = 0x01
    contents[0x2125] = 0x00
    contents[0x2126] = 0x00
    contents[0x2127] = 0x00

    # sh_flags
    contents[0x2128] = 0x02
    contents[0x2129] = 0x00
    contents[0x212a] = 0x00
    contents[0x212b] = 0x00
    contents[0x212c] = 0x00
    contents[0x212d] = 0x00
    contents[0x212e] = 0x00
    contents[0x212f] = 0x00

    # sh_addr
    contents[0x2130] = 0x00
    contents[0x2131] = 0x20
    contents[0x2132] = 0x40
    contents[0x2133] = 0x00
    contents[0x2134] = 0x00
    contents[0x2135] = 0x00
    contents[0x2136] = 0x00
    contents[0x2137] = 0x00

    # sh_offset
    contents[0x2138] = 0x00
    contents[0x2139] = 0x20
    contents[0x213a] = 0x00
    contents[0x213b] = 0x00
    contents[0x213c] = 0x00
    contents[0x213d] = 0x00
    contents[0x213e] = 0x00
    contents[0x213f] = 0x00

    # sh_size
    contents[0x2140] = 0x0c
    contents[0x2141] = 0x00
    contents[0x2142] = 0x00
    contents[0x2143] = 0x00
    contents[0x2144] = 0x00
    contents[0x2145] = 0x00
    contents[0x2146] = 0x00
    contents[0x2147] = 0x00

    # sh_link
    contents[0x2148] = 0x00
    contents[0x2149] = 0x00
    contents[0x214a] = 0x00
    contents[0x214b] = 0x00

    # sh_info
    contents[0x214c] = 0x00
    contents[0x214d] = 0x00
    contents[0x214e] = 0x00
    contents[0x214f] = 0x00

    # sh_addralign
    contents[0x2150] = 0x08
    contents[0x2151] = 0x00
    contents[0x2152] = 0x00
    contents[0x2153] = 0x00
    contents[0x2154] = 0x00
    contents[0x2155] = 0x00
    contents[0x2156] = 0x00
    contents[0x2157] = 0x00

    # sh_entsize
    contents[0x2158] = 0x00
    contents[0x2159] = 0x00
    contents[0x215a] = 0x00
    contents[0x215b] = 0x00
    contents[0x215c] = 0x00
    contents[0x215d] = 0x00
    contents[0x215e] = 0x00
    contents[0x215f] = 0x00

    # ========================

    # .symtab

    # sh_name
    contents[0x2160] = 0x0f
    contents[0x2161] = 0x00
    contents[0x2162] = 0x00
    contents[0x2163] = 0x00

    # sh_type
    contents[0x2164] = 0x02
    contents[0x2165] = 0x00
    contents[0x2166] = 0x00
    contents[0x2167] = 0x00

    # sh_flags
    contents[0x2168] = 0x00
    contents[0x2169] = 0x00
    contents[0x216a] = 0x00
    contents[0x216b] = 0x00
    contents[0x216c] = 0x00
    contents[0x216d] = 0x00
    contents[0x216e] = 0x00
    contents[0x216f] = 0x00

    # sh_addr
    contents[0x2170] = 0x00
    contents[0x2171] = 0x00
    contents[0x2172] = 0x00
    contents[0x2173] = 0x00
    contents[0x2174] = 0x00
    contents[0x2175] = 0x00
    contents[0x2176] = 0x00
    contents[0x2177] = 0x00

    # sh_offset
    contents[0x2178] = 0x18
    contents[0x2179] = 0x20
    contents[0x217a] = 0x00
    contents[0x217b] = 0x00
    contents[0x217c] = 0x00
    contents[0x217d] = 0x00
    contents[0x217e] = 0x00
    contents[0x217f] = 0x00

    # sh_size
    contents[0x2180] = 0x48
    contents[0x2181] = 0x00
    contents[0x2182] = 0x00
    contents[0x2183] = 0x00
    contents[0x2184] = 0x00
    contents[0x2185] = 0x00
    contents[0x2186] = 0x00
    contents[0x2187] = 0x00

    # sh_link
    contents[0x2188] = 0x04
    contents[0x2189] = 0x00
    contents[0x218a] = 0x00
    contents[0x218b] = 0x00

    # sh_info
    contents[0x218c] = 0x02
    contents[0x218d] = 0x00
    contents[0x218e] = 0x00
    contents[0x218f] = 0x00

    # sh_addralign
    contents[0x2190] = 0x08
    contents[0x2191] = 0x00
    contents[0x2192] = 0x00
    contents[0x2193] = 0x00
    contents[0x2194] = 0x00
    contents[0x2195] = 0x00
    contents[0x2196] = 0x00
    contents[0x2197] = 0x00

    # sh_entsize
    contents[0x2198] = 0x18
    contents[0x2199] = 0x00
    contents[0x219a] = 0x00
    contents[0x219b] = 0x00
    contents[0x219c] = 0x00
    contents[0x219d] = 0x00
    contents[0x219e] = 0x00
    contents[0x219f] = 0x00

    # ========================

    # .strtab

    # sh_name
    contents[0x21a0] = 0x17
    contents[0x21a1] = 0x00
    contents[0x21a2] = 0x00
    contents[0x21a3] = 0x00

    # sh_type
    contents[0x21a4] = 0x03
    contents[0x21a5] = 0x00
    contents[0x21a6] = 0x00
    contents[0x21a7] = 0x00

    # sh_flags
    contents[0x21a8] = 0x00
    contents[0x21a9] = 0x00
    contents[0x21aa] = 0x00
    contents[0x21ab] = 0x00
    contents[0x21ac] = 0x00
    contents[0x21ad] = 0x00
    contents[0x21ae] = 0x00
    contents[0x21af] = 0x00

    # sh_addr
    contents[0x21b0] = 0x00
    contents[0x21b1] = 0x00
    contents[0x21b2] = 0x00
    contents[0x21b3] = 0x00
    contents[0x21b4] = 0x00
    contents[0x21b5] = 0x00
    contents[0x21b6] = 0x00
    contents[0x21b7] = 0x00

    # sh_offset
    contents[0x21b8] = 0x60
    contents[0x21b9] = 0x20
    contents[0x21ba] = 0x00
    contents[0x21bb] = 0x00
    contents[0x21bc] = 0x00
    contents[0x21bd] = 0x00
    contents[0x21be] = 0x00
    contents[0x21bf] = 0x00

    # sh_size
    contents[0x21c0] = 0x0f
    contents[0x21c1] = 0x00
    contents[0x21c2] = 0x00
    contents[0x21c3] = 0x00
    contents[0x21c4] = 0x00
    contents[0x21c5] = 0x00
    contents[0x21c6] = 0x00
    contents[0x21c7] = 0x00

    # sh_link
    contents[0x21c8] = 0x00
    contents[0x21c9] = 0x00
    contents[0x21ca] = 0x00
    contents[0x21cb] = 0x00

    # sh_info
    contents[0x21cc] = 0x00
    contents[0x21cd] = 0x00
    contents[0x21ce] = 0x00
    contents[0x21cf] = 0x00

    # sh_addralign
    contents[0x21d0] = 0x01
    contents[0x21d1] = 0x00
    contents[0x21d2] = 0x00
    contents[0x21d3] = 0x00
    contents[0x21d4] = 0x00
    contents[0x21d5] = 0x00
    contents[0x21d6] = 0x00
    contents[0x21d7] = 0x00

    # sh_entsize
    contents[0x21d8] = 0x00
    contents[0x21d9] = 0x00
    contents[0x21da] = 0x00
    contents[0x21db] = 0x00
    contents[0x21dc] = 0x00
    contents[0x21dd] = 0x00
    contents[0x21de] = 0x00
    contents[0x21df] = 0x00

    # ========================

    # .shstrtab

    # sh_name
    contents[0x21e0] = 0x1f
    contents[0x21e1] = 0x00
    contents[0x21e2] = 0x00
    contents[0x21e3] = 0x00

    # sh_type
    contents[0x21e4] = 0x03
    contents[0x21e5] = 0x00
    contents[0x21e6] = 0x00
    contents[0x21e7] = 0x00

    # sh_flags
    contents[0x21e8] = 0x00
    contents[0x21e9] = 0x00
    contents[0x21ea] = 0x00
    contents[0x21eb] = 0x00
    contents[0x21ec] = 0x00
    contents[0x21ed] = 0x00
    contents[0x21ee] = 0x00
    contents[0x21ef] = 0x00

    # sh_addr
    contents[0x21f0] = 0x00
    contents[0x21f1] = 0x00
    contents[0x21f2] = 0x00
    contents[0x21f3] = 0x00
    contents[0x21f4] = 0x00
    contents[0x21f5] = 0x00
    contents[0x21f6] = 0x00
    contents[0x21f7] = 0x00

    # sh_offset
    contents[0x21f8] = 0x70
    contents[0x21f9] = 0x20
    contents[0x21fa] = 0x00
    contents[0x21fb] = 0x00
    contents[0x21fc] = 0x00
    contents[0x21fd] = 0x00
    contents[0x21fe] = 0x00
    contents[0x21ff] = 0x00

    # sh_size
    contents[0x2200] = 0x29
    contents[0x2201] = 0x00
    contents[0x2202] = 0x00
    contents[0x2203] = 0x00
    contents[0x2204] = 0x00
    contents[0x2205] = 0x00
    contents[0x2206] = 0x00
    contents[0x2207] = 0x00

    # sh_link
    contents[0x2208] = 0x00
    contents[0x2209] = 0x00
    contents[0x220a] = 0x00
    contents[0x220b] = 0x00

    # sh_info
    contents[0x220c] = 0x00
    contents[0x220d] = 0x00
    contents[0x220e] = 0x00
    contents[0x220f] = 0x00

    # sh_addralign
    contents[0x2210] = 0x01
    contents[0x2211] = 0x00
    contents[0x2212] = 0x00
    contents[0x2213] = 0x00
    contents[0x2214] = 0x00
    contents[0x2215] = 0x00
    contents[0x2216] = 0x00
    contents[0x2217] = 0x00

    # sh_entsize
    contents[0x2218] = 0x00
    contents[0x2219] = 0x00
    contents[0x221a] = 0x00
    contents[0x221b] = 0x00
    contents[0x221c] = 0x00
    contents[0x221d] = 0x00
    contents[0x221e] = 0x00
    contents[0x221f] = 0x00

    os.makedirs("bin", exist_ok=True)
    with open("bin/exec-hello-world", "wb") as file:
        file.write(contents)

    os.chmod("bin/exec-hello-world", 0o755)


if __name__ == "__main__":
    main()