mreamap() режет указатель до 32-битного

		void* fileMem, *pos;
		int fd, res;
		long int flen, fpos;
		size_t i,o,p;
	fd = open( "myfile.txt", O_RDONLY );
	if( fd < 0 )
		exit(1);
	flen = lseek64( fd, 0, SEEK_END );
	if( -1 == flen ){
		perror("llseek(): ");
		exit(1);
	}
	lseek64( fd, 0, SEEK_SET );

	fileMem = mmap( 0, pageLimit, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0 );
	if( fileMem == MAP_FAILED ){
		perror("llseek(): ");
		exit(1);
	}
	memset( fileMem, 'a', pageLimit );
	//fileMem = mremap(fileMem, pageLimit, pageLimit*2, 1 );  //Incorrect pointer
	fileMem = syscall(SYS_mremap, fileMem, pageLimit, pageLimit*2, 1 );  //Correct pointer
	if( fileMem == MAP_FAILED ){
		switch(errno){
			case ENOMEM:
				printf("NO memory\n");
				break;
			case EINVAL:
				printf("Invalid args\n");
				break;
		}
		perror("mremap(): ");
		exit(1);
	}

	memset( fileMem + pageLimit, 'b', pageLimit );
	write( 1, fileMem, pageLimit*2 );

#define _LARGEFILE64_SOURCE
#include <stdio.h> //printf
	#include <linux/sched.h>
#include <string.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/time.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
	#include <limits.h>
#include <errno.h>
#include <error.h>
#include <signal.h>
	#include <sys/mman.h>
#include <resolv.h>
#include <netdb.h>
#include <openssl/bio.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#include <openssl/x509_vfy.h>