E.13.10 File-I/O Examples

Example sequence of a write call, file descriptor 3, buffer is at target address 0x1234, 6 bytes should be written:

     <- Fwrite,3,1234,6
     request memory read from target
     -> m1234,6
     <- XXXXXX
     return "6 bytes written"
     -> F6

Example sequence of a read call, file descriptor 3, buffer is at target address 0x1234, 6 bytes should be read:

     <- Fread,3,1234,6
     request memory write to target
     -> X1234,6:XXXXXX
     return "6 bytes read"
     -> F6

Example sequence of a read call, call fails on the host due to invalid file descriptor (EBADF):

     <- Fread,3,1234,6
     -> F-1,9

Example sequence of a read call, user presses Ctrl-c before syscall on host is called:

     <- Fread,3,1234,6
     -> F-1,4,C
     <- T02

Example sequence of a read call, user presses Ctrl-c after syscall on host is called:

     <- Fread,3,1234,6
     -> X1234,6:XXXXXX
     <- T02