[HaBo]

; hello.asm
    mov ecx,msg
    mov edx,msglen
    mov ebx,1 ; STDOUT
    mov eax,4 ; Funktionsnummer: Ausgabe
    int 80h
    mov ebx,0 ; EXITCODE
    mov eax,1 ; Funknr: Exit
    int 80h


msg: db "Hello ya encrypted world!"
msglen: equ $ - msg

// loader.c
#include <stdlib.h>
#include <stdio.h>
#include <sys/mman.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>


int main(){
// der als hex codierte Inhalt der eben erstellten .bin Datei
        const char *hello = "\x66\xb9\x28\x00\x00\x00\x66\xba\x19\x00\x00\x00\x66\xbb\x01\x00"
                "\x00\x00\x66\xb8\x04\x00\x00\x00\xcd\x80\x66\xbb\x00\x00\x00\x00"
                "\x66\xb8\x01\x00\x00\x00\xcd\x80\x48\x65\x6c\x6c\x6f\x20\x79\x61"
                "\x20\x65\x6e\x63\x72\x79\x70\x74\x65\x64\x20\x77\x6f\x72\x6c\x64"
                "\x21";
        const int len = 65;

        size_t size = sizeof(char) * len;

        printf("pos-hello: %08x\n", (long) hello);

        void* mem = memalign(sysconf(_SC_PAGESIZE), size);
        if(mem == NULL) {
                perror(0);
                return 1;
        }

        printf("pos-mem: %08x\n", (long) mem);

        memcpy(mem, hello, size);
        
        if(mprotect(mem, size, PROT_READ|PROT_WRITE|PROT_EXEC) == -1){
                perror(0); 
                return 1;
        }

        int (*F)() = mem;
        printf("pos-F: %08x\n", (long) F);
        F();
}

call over_txt
msg db "Hello SC-World!",0
over_txt:
pop ecx

Syscallnummern SYSCALL

 ; FILE syscall_64_syscall.inc

%define _syscall syscall
%define _nr rax
%define _arg1 rdi
%define _arg2 rsi
%define _arg3 rdx
%define _arg4 rcx
%define _arg5 r8
%define _arg6 r9

%define _sys_read 0
%define _sys_write 1
...
%define _sys_exit 60

jmp my_code
msg: db "Hello ya encrypted world!"
msglen equ $ - msg
my_code:
    mov rax,1 
    mov rdi,1 ;stdout
    lea rsi,[rel msg]
    mov rdx, msglen
    syscall

    mov rdi,0
    mov rax,60h ; Funknr: Exit
    syscall
    ret

lea rsi,[rel msg]