[OpenOCD-devel] [openocd:tickets] Re: #232 semihosting_fileio read return wrong number of read bytes

[hogthrob <hog...@us...>]

BTW, how to test semihosting via GDB is simple:

Assuming you have a STM32 semihosted application (in .elf) and openocd is running:

arm-none-eabi-gdb <elf> 
...
target remote :3333
monitor arm semihosting enable
monitor arm semihosting_fileio enable
load
continue
...

Now your file IO is done through gdb.  It really only makes sense if you forward the local OpenOCD tcp port via SSH (or some other means) to another machine on which the GDB runs (and where you want/must have the files), otherwise the GDB fileio and the OpenOCD fileio make not much of a difference.







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** [tickets:#232] semihosting_fileio read return wrong number of read bytes**

**Status:** new
**Milestone:** 0.9.0
**Created:** Sun Apr 21, 2019 04:18 PM UTC by hogthrob
**Last Updated:** Sun Apr 21, 2019 10:01 PM UTC
**Owner:** nobody


The current implementation of read for semihosting_fileio read  works only for reads returning exactly the requested amount OR in case of EOF/ERROR.

In the case of "not full" read with respect to requested bytes, the number of requested bytes - returned bytes was returned (i.e. how many bytes have not been read), which should have been the number of read bytes.

Please integrate the following fix:

https://github.com/db4ple/openocd/commit/0a87bac689a271c8e6fb97a48ee23e4d019a4438



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