Date: Tue, 11 Feb 2020 15:09:13 +0100 From: Andrea Venturoli <ml@netfence.it> To: freebsd-questions@freebsd.org Subject: Cannot get remote GDB to work Message-ID: <50a10abf-4873-2acc-4f8b-efb9bddb1194@netfence.it>
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Hello. I'm trying to debug through a serial cable, as described in: > https://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-online-gdb.html I followed the instruction (I believe correctly), but when I issue "target remote /dev/cuau0", I get: > Remote debugging using /dev/cuau0 > Ignoring packet error, continuing... > warning: unrecognized item "timeout" in "qSupported" response > Ignoring packet error, continuing... > Remote replied unexpectedly to 'vMustReplyEmpty': timeout I tried launching "cu -l /dev/cuau0" on both sides: I can correctly see what I type in the debugging terminal appear on the host's screen, but not vice versa. This starts working again, when I remove flags 0x80 from hint.uart.0.flags and change it back to 0x10 (default). Any hint? bye & Thanks av. P.S. Both machines are physical (no virtualization here), both are 12.1/amd64 and both serial ports are dumb old style serial ports.
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