## This file is part of stage0. ## ## stage0 is free software: you an 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. ## ## stage0 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 stage0. If not, see . ## ELF Header 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 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 3E 00 ## e_machine Indicating AMD64 01 00 00 00 ## e_version Indicating original elf 78 00 60 00 00 00 00 00 40 00 00 00 00 00 00 00 ## e_phoff Address of program header table 30 01 00 00 00 00 00 00 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 table 01 00 00 00 ## p_type 06 00 00 00 ## Flags 00 00 00 00 00 00 00 00 ## p_offset 00 00 60 00 00 00 00 00 ## p_vaddr 00 00 00 00 00 00 00 00 ## Undefined 18 01 00 00 00 00 00 00 ## p_filesz 18 01 00 00 00 00 00 00 ## p_memsz 00 00 20 00 00 00 00 00 ## Required alignment ## Start 48 c7 c2 01 00 00 00 # mov $0x1,%rdx 48 c7 c6 17 01 60 00 # mov $0x600117,%rsi 48 c7 c7 00 00 00 00 # mov $0x0,%rdi 48 c7 c0 00 00 00 00 # mov $0x0,%rax 0f 05 # syscall 48 85 c0 # test %rax,%rax 74 5b # je 6000f6 8a 04 25 17 01 60 00 # mov 0x600117,%al 4c 0f b6 e0 # movzbq %al,%r12 4c 0f b6 e8 # movzbq %al,%r13 49 c1 ec 04 # shr $0x4,%r12 49 83 e5 0f # and $0xf,%r13 49 81 c4 06 01 60 00 # add $0x600106,%r12 49 81 c5 06 01 60 00 # add $0x600106,%r13 48 c7 c2 01 00 00 00 # mov $0x1,%rdx 4c 89 e6 # mov %r12,%rsi 48 c7 c7 01 00 00 00 # mov $0x1,%rdi 48 c7 c0 01 00 00 00 # mov $0x1,%rax 0f 05 # syscall 48 c7 c2 01 00 00 00 # mov $0x1,%rdx 4c 89 ee # mov %r13,%rsi 48 c7 c7 01 00 00 00 # mov $0x1,%rdi 48 c7 c0 01 00 00 00 # mov $0x1,%rax 0f 05 # syscall eb 82 # jmp 600078 <_start> ## Done 48 c7 c7 00 00 00 00 # mov $0x0,%rdi 48 c7 c0 3c 00 00 00 # mov $0x3c,%rax 0f 05 # syscall ## Hex output chars 30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 46 0A ## Where the byte we are reading is shoved 00