[RTEMS Project] #3060: ARMv7-M interrupt processing is broken

RTEMS trac trac at rtems.org
Tue Jul 4 13:16:02 UTC 2017

#3060: ARMv7-M interrupt processing is broken
 Reporter:  Sebastian Huber  |       Owner:  Sebastian Huber
     Type:  defect           |      Status:  assigned
 Priority:  normal           |   Milestone:  4.11.2
Component:  cpukit           |     Version:  4.11
 Severity:  normal           |  Resolution:
 Keywords:                   |

Comment (by Sebastian Huber <sebastian.huber@…>):

 In [changeset:"3e7827434d3dd0b59a7d49798facd7bba0a73e23/rtems"
 #!CommitTicketReference repository="rtems"
 arm: Fix ARMv7-M interrupt processing

 Right after a "msr basepri_max, %[basepri]" instruction an interrupt
 service may still take place (observed at least on Cortex-M7).  However,
 pendable service calls that are activated during this interrupt service
 may be delayed until interrupts are enable again.  The
 _ARMV7M_Pendable_service_call() did not check that a thread dispatch is
 allowed.  Move this test from _ARMV7M_Interrupt_service_leave() to

 Update #3060.

Ticket URL: <http://devel.rtems.org/ticket/3060#comment:2>
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