hakmem/check_addr_mmap.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>

int main() {
    void* p = malloc(10);
    printf("Malloc ptr: %p\n", p);
    
    void* m = mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
    printf("Mmap ptr:   %p\n", m);

    unsigned long long addr = (unsigned long long)m;
    if (addr > 0x00007fffffffffffULL) {
        printf("Mmap Address > 48-bit detected!\n");
    } else {
        printf("Mmap Address within 48-bit range.\n");
    }
    
    free(p);
    munmap(m, 4096);
    return 0;
}