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Tiny ELF 32 (put code into _start)
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| ; From: http://blog.stalkr.net/2014/10/tiny-elf-3264-with-nasm.html | |
| ; nasm -f bin -o tiny32 tiny32.asm | |
| BITS 32 | |
| org 0x08048000 | |
| ehdr: ; Elf32_Ehdr | |
| db 0x7F, "ELF", 1, 1, 1, 0 ; e_ident | |
| times 8 db 0 | |
| dw 2 ; e_type | |
| dw 3 ; e_machine | |
| dd 1 ; e_version | |
| dd _start ; e_entry | |
| dd phdr - $$ ; e_phoff | |
| dd 0 ; e_shoff | |
| dd 0 ; e_flags | |
| dw ehdrsize ; e_ehsize | |
| dw phdrsize ; e_phentsize | |
| dw 1 ; e_phnum | |
| dw 0 ; e_shentsize | |
| dw 0 ; e_shnum | |
| dw 0 ; e_shstrndx | |
| ehdrsize equ $ - ehdr | |
| phdr: ; Elf32_Phdr | |
| dd 1 ; p_type | |
| dd 0 ; p_offset | |
| dd $$ ; p_vaddr | |
| dd $$ ; p_paddr | |
| dd filesize ; p_filesz | |
| dd filesize ; p_memsz | |
| dd 5 ; p_flags | |
| dd 0x1000 ; p_align | |
| phdrsize equ $ - phdr | |
| _start: | |
| mov al, 1 ; sys_exit | |
| mov bl, 42 ; int status | |
| int 0x80 | |
| filesize equ $ - $$ |
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