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semihosting: permit redirection of semihosting I/O to TCP

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This command permits the usage of a TCP port to perform debug and stdio
operations:
 - debug : READC, WRITEC and WRITE0
 - stdio : READ, WRITE

This will permit the separation of semihosting message from OpenOCD log,
and separate semihosting messages per core.

syntax: arm semihosting_redirect (disable | tcp <port> [debug|stdio|all])

this allows to select which operations to be performed via TCP (debug,
stdio or all (default)).

Note: for stdio operations, only I/O from/to ':tt' file descriptors are
redirected.

tested using netcat on ubuntu

Change-Id: I37053463667ba109d52429d4f98bc98d0ede298d
Signed-off-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/5562
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This commit is contained in:
Tarek BOCHKATI
2020-04-06 13:30:26 +01:00
committed by Antonio Borneo
parent 4e5dbecd9b
commit b9526f1401
3 changed files with 343 additions and 17 deletions
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11
doc/openocd.texi
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@@ -9370,6 +9370,17 @@ requests by using a special SVC instruction that is trapped at the
Supervisor Call vector by OpenOCD.
@end deffn
@deffn {Command} {arm semihosting_redirect} (@option{disable} | @option{tcp} <port>
[@option{debug}|@option{stdio}|@option{all})
@cindex ARM semihosting
Redirect semihosting messages to a specified TCP port.
This command redirects debug (READC, WRITEC and WRITE0) and stdio (READ, WRITE)
semihosting operations to the specified TCP port.
The command allows to select which type of operations to redirect (debug, stdio, all (default)).
Note: for stdio operations, only I/O from/to ':tt' file descriptors are redirected.
@end deffn
@deffn {Command} {arm semihosting_cmdline} [@option{enable}|@option{disable}]
@cindex ARM semihosting
Set the command line to be passed to the debugger.