4.10.2. Target-dependent input/output support functions

rt_sys.h defines the type FILEHANDLE. The value of FILEHANDLE is returned by _sys_open() and identifies an open file on the host system.

The target-dependent input and output functions and their library members are listed in Table 4.15.

Table 4.15. I/O support functions


The default implementation of these functions is semihosted. That is, each function uses the semihosting SWI. If any function is redefined, all stream-support functions must be redefined.

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