## 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 ## e_entry Address of the entry point 40 00 00 00 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 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 F1 00 00 00 00 00 00 00 ## p_filesz F1 00 00 00 00 00 00 00 ## p_memsz 00 00 20 00 00 00 00 00 ## Required alignment # Start 58 # pop %rax 5f # pop %rdi 5f # pop %rdi 48 83 f8 02 # cmp $0x2,%rax 75 5f # jne 6000e0 48 c7 c6 00 00 00 00 # mov $0x0,%rsi 48 c7 c0 02 00 00 00 # mov $0x2,%rax 0f 05 # syscall 48 85 c0 # test %rax,%rax 78 4a # js 6000e0 48 89 c7 # mov %rax,%rdi # Circle 48 c7 c2 00 00 00 40 # mov $0x40000000,%rdx 48 c7 c6 f0 00 60 00 # mov $0x6000f0,%rsi 48 c7 c0 00 00 00 00 # mov $0x0,%rax 0f 05 # syscall 48 85 c0 # test %rax,%rax 74 1b # je 6000d0 48 89 c2 # mov %rax,%rdx 48 89 fc # mov %rdi,%rsp 48 c7 c7 01 00 00 00 # mov $0x1,%rdi 48 c7 c0 01 00 00 00 # mov $0x1,%rax 0f 05 # syscall 48 89 e7 # mov %rsp,%rdi eb c9 # jmp 600099 # Done 48 c7 c7 00 00 00 00 # mov $0x0,%rdi 48 c7 c0 3c 00 00 00 # mov $0x3c,%rax 0f 05 # syscall # Bail 48 c7 c7 01 00 00 00 # mov $0x0,%rdi 48 c7 c0 3c 00 00 00 # mov $0x3c,%rax 0f 05 # syscall