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.mayd...@linaro.org>
Reviewed-by: Luc Michel <l...@lmichel.fr>
Message-id: 20220526190053.521505-3-peter.mayd...@linaro.org
---
semihosting/config.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/semihosting/config.c b/semihosting/config.c
index 50d82108e6e..3afacf54ab2 100644
--- a/semihosting/config.c
+++ b/semihosting/config.c
@@ -27,6 +27,7 @@
QemuOptsList qemu_semihosting_config_opts = {
.name = "semihosting-config",
+ .merge_lists = true,
.implied_opt_name = "enable",
.head = QTAILQ_HEAD_INITIALIZER(qemu_semihosting_config_opts.head),
.desc = {
--
2.25.1
