Debugging with GDB: File-I/O Examples

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#### 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