Merge pull request #2244 from RT-Thread/fix_libc_posix

Fix libc posix

Author: BernardXiong

components/libc/aio/posix_aio.c

@@ -170,7 +170,7 @@ static void aio_read_work(struct rt_work* work, void* work_data)
     if (len <= 0)
         cb->aio_result = errno;
     else 
-        cb->aio_result = 0;
+        cb->aio_result = len;
     rt_hw_interrupt_enable(level);
 
     return ;
@@ -321,6 +321,7 @@ static void aio_write_work(struct rt_work* work, void* work_data)
 
     return;
 }
+
 /**
  * The aio_write() function shall write aiocbp->aio_nbytes to the file associated 
  * with aiocbp->aio_fildes from the buffer pointed to by aiocbp->aio_buf. The 

components/libc/mmap/posix_mmap.c

@@ -35,7 +35,7 @@ void *mmap(void *addr, size_t length, int prot, int flags,
         cur = lseek(fd, 0, SEEK_SET);
 
         lseek(fd, offset, SEEK_SET);
-        read_bytes = read(fd, addr, length);
+        read_bytes = read(fd, mem, length);
         if (read_bytes != length)
         {
             if (addr == RT_NULL)