Currently we mishandle the --semihosting-config option if the
user specifies it on the command line more than once. For
example with:
--semihosting-config target=gdb --semihosting-config arg=foo,arg=bar
the function qemu_semihosting_config_options() is called twice, once
for each argument. But that function expects to be called only once,
and it always unconditionally sets the semihosting.enabled,
semihost_chardev and semihosting.target variables. This means that
if any of those options were set anywhere except the last
--semihosting-config option on the command line, those settings are
ignored. In the example above, 'target=gdb' in the first option is
overridden by an implied default 'target=auto' in the second.
The QemuOptsList machinery has a flag for handling this kind of
"option group is setting global state": by setting
.merge_lists = true;
we make the machinery merge all the --semihosting-config arguments
the user passes into a single set of options and call our
qemu_semihosting_config_options() just once.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Luc Michel <luc@lmichel.fr>
Message-id: 20220526190053.521505-3-peter.maydell@linaro.org
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