Memory allocated function

// Header files
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>

typedef unsigned char byte;

bool ProtectMemory(void * addr, int flags)
{
    // Constant holding the page size value
    const size_t pageSize = sysconf(_SC_PAGE_SIZE);

    // Calculate relative page offset
    size_t temp = (size_t) addr;
    temp -= temp % pageSize;

    // Update address
    addr = (void*) temp;

    // Update memory area protection
    return !mprotect(addr, pageSize, flags);
}

typedef int (*testFunc)(int, int);

int main(void)
{
    char func[] = {0x55, 0x48, 0x89, 0xe5, 0x89, 0x7d, 0xfc,
    0x89, 0x75, 0xf8, 0x8b, 0x45, 0xf8,
    0x8b, 0x55, 0xfc, 0x8d, 0x04, 0x02,
    0xc9, 0xc3};

    testFunc func_copy = (testFunc) malloc(sizeof(func));
    memcpy(func_copy, func, sizeof(func));

    ProtectMemory(func_copy, PROT_WRITE | PROT_READ | PROT_EXEC);

    printf("1 + 2 = %d\n", func_copy(1,2)); // segfaults here

    free(func_copy);
    return 0;
}