Run Your Shellcode with mman on Linux

shellcode_with_mman.c

//  ( segmentation fault – core dumped problem solver )

#include <stdio.h>
#include <sys/mman.h>
#include <string.h>
#include <stdlib.h>
 
int (*shellcode)();
 
char code[] = "\xeb\x19\x31\xc0\x31\xdb\x31\xd2\x31\xc9\xb0\x04\xb3\x01\x59\xb2\x05\xcd"\
              "\x80\x31\xc0\xb0\x01\x31\xdb\xcd\x80\xe8\xe2\xff\xff\xff\x68\x65\x6c\x6c\x6f";
 
int main(int argc, char **argv) {
    void *p = mmap(0, sizeof(code), PROT_EXEC | PROT_WRITE | PROT_READ, MAP_ANON | MAP_PRIVATE, -1, 0);
    if (p == MAP_FAILED) { perror("mmap"); exit(-1); }
    memcpy(p, code, sizeof(code));
    shellcode = p;
    shellcode();
    return 0;
}