stlink/src/mmap.c

#include <string.h>
#include <sys/types.h>
#include <stdlib.h>
#include <unistd.h>

#include "stlink/mmap.h"

void *mmap (void *addr, size_t len, int prot, int flags, int fd, long long  offset) {

    void *buf;
    ssize_t count;

    if ( addr || fd == -1 || (prot & PROT_WRITE)) return MAP_FAILED;

    buf = malloc(len);
    if ( NULL == buf ) return MAP_FAILED;

    if (lseek(fd,offset,SEEK_SET) != offset) return MAP_FAILED;

    count = read(fd, buf, len);

    if (count != len) {
        free (buf);
        return MAP_FAILED;
    }

    return buf;
}

int munmap (void *addr, size_t len) {
    free (addr);
    return 0;
}