.pt_gnu_stack rw // elf-specific instruction //.interp none // request minimal elf, no section/dynamic/interpreter #define __i386__ #include // can use the C preprocessor stdout equ 1 // 'equ' constant definition syscall macro nr // asm-style macros mov eax, nr ; the syscall number goes in eax int 80h endm #define syscall1(nr, arg) mov ebx, arg syscall(__NR_##nr) // c++-style macros #define syscall3(nr, arg1, arg2, arg3) mov edx, arg3 mov ecx, arg2 syscall1(nr, arg1) .entrypoint // the elf entrypoint nop nop call 1f // 1f is the first label named '1' found forward toto_str db "toto\n" toto_str_len equ $ - toto_str // $ is the address of the start of the current instruction/data 1: pop ebp syscall3(write, stdout, ebp, toto_str_len) /* ; hang forever jmp $ */ syscall1(exit, 0) hlt