#include <stdio.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <string.h>
#include <stdint.h>
#include <pthread.h>

#ifndef SYS_mmap
#define SYS_mmap 9
#endif
#ifndef SYS_bpf
#define SYS_bpf 321
#endif

long r[6];

int main(int argc, char **argv)
{
    printf("--beginning of program\n");

    while(1) {

        pid_t pid = fork();

        if (pid == 0)
        {
            // child process
            memset(r, -1, sizeof(r));
            r[0] = syscall(SYS_mmap, 0x20000000ul, 0xf000ul, 0x3ul, 0x32ul,
0xfffffffffffffffful, 0x0ul);
            *(uint32_t*)0x20006eea = (uint32_t)0x6;
            *(uint32_t*)0x20006eee = (uint32_t)0x4;
            *(uint32_t*)0x20006ef2 = (uint32_t)0x54d1;
            *(uint32_t*)0x20006ef6 = (uint32_t)0xc93;
            r[5] = syscall(SYS_bpf, 0x0ul, 0x20006eeaul, 0x10ul, 0, 0, 0);
            return 0;
        }
        else if (pid > 0)
        {
            // parent process
            memset(r, -1, sizeof(r));
            r[0] = syscall(SYS_mmap, 0x20000000ul, 0xf000ul, 0x3ul, 0x32ul,
0xfffffffffffffffful, 0x0ul);
            *(uint32_t*)0x20006eea = (uint32_t)0x6;
            *(uint32_t*)0x20006eee = (uint32_t)0x4;
            *(uint32_t*)0x20006ef2 = (uint32_t)0x54d1;
            *(uint32_t*)0x20006ef6 = (uint32_t)0xc93;
            r[5] = syscall(SYS_bpf, 0x0ul, 0x20006eeaul, 0x10ul, 0, 0, 0);
            int returnStatus;
            waitpid(pid, &returnStatus, 0);
            printf("collected child\n");

        }
        else
        {
            // fork failed
            printf("fork() failed!\n");
            return 1;
        }
    }

    printf("--end of program--\n");

    return 0;
}