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Strip the trace bit from the SR register when dispatching a thread when

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exiting from an ISR. This allows the trace bit to be set on a per task
basis and tracing to be limited to that task.
This commit is contained in:
Joel Sherrill
1997-07-10 19:09:16 +00:00
parent 900a3ab184
commit 487c4f62d3
1 changed files with 5 additions and 3 deletions
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8
c/src/exec/score/cpu/m68k/cpu_asm.s
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@@ -202,9 +202,11 @@ bframe: clrl SYM (_ISR_Signals_to_thread_executing)
movec a0,msp | set master stack pointer
#else
movew a7@(16+SR_OFFSET),sr
jsr SYM (_Thread_Dispatch)
| filter out the trace bit to stop single step debugging breaking
movew a7@(16+SR_OFFSET),d0
andw #0x7FFF,d0
movew d0,sr
jsr SYM (_Thread_Dispatch)
#endif
exit: moveml a7@+,d0-d1/a0-a1 | restore d0-d1,a0-a1