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NIOS2: Fix outermost interrupt check

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This fix is critical.  The previous implementation leads to system
corruption.
This commit is contained in:
Sebastian Huber
2012-03-30 14:55:17 +02:00
parent 9fc284cfde
commit 64d2c8adf9
1 changed files with 4 additions and 1 deletions
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5
cpukit/score/cpu/nios2/nios2-eic-il-low-level.S
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@@ -70,6 +70,9 @@ _Nios2_ISR_Dispatch_with_shadow_non_preemptive:
/* Load Nios II specific thread dispatch disabled */ /* Load Nios II specific thread dispatch disabled */
ldw r13, %gprel(_Nios2_Thread_dispatch_disabled)(gp) ldw r13, %gprel(_Nios2_Thread_dispatch_disabled)(gp)
/* Read status */
rdctl r14, status
/* Fix return address */ /* Fix return address */
subi ea, ea, 4 subi ea, ea, 4
@@ -88,7 +91,7 @@ _Nios2_ISR_Dispatch_with_shadow_non_preemptive:
beq r12, zero, no_thread_dispatch beq r12, zero, no_thread_dispatch
/* Is outermost interrupt? */ /* Is outermost interrupt? */
andhi r14, sstatus, 0x3f andhi r14, r14, 0x3f
bne r14, zero, no_thread_dispatch bne r14, zero, no_thread_dispatch
/* Is Nios II specific thread dispatch allowed? */ /* Is Nios II specific thread dispatch allowed? */