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ARC: SMP: fix livelock in thread abort due to exception

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We are missing setting of switch_handle for the thread which
is aborting due to exception (i.e. in case of k_panic or
__ASSERT triggered). This may cause livelock in SMP code
after a08e23f68e commit ("kernel/sched: Fix SMP
must-wait-for-switch conditions in abort/join").

Fix that.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Evgeniy Paltsev <PaltsevEvgeniy@gmail.com>
This commit is contained in:
Evgeniy Paltsev 2023-06-06 13:11:06 +01:00 • committed by Anas Nashif
commit 9d6ced3822
1 changed files with 5 additions and 0 deletions
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5
arch/arc/core/fault_s.S
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@ -118,6 +118,11 @@ _exc_return:
BREQR r0, 0, _exc_return_from_exc
/* Save old thread into switch handle which is required by z_sched_switch_spin which
* will be called during old thread abort.
*/
STR r2, r2, ___thread_t_switch_handle_OFFSET
MOVR r2, r0
#ifdef CONFIG_ARC_SECURE_FIRMWARE