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Replace critical_enter() and critical_exit() in kdb_trap() with

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intr_disable() and intr_restore() resp. Previously, critical
regions would have interrupts disabled, but that was changed.
Consequently, the debugger could run with interrupts enabled.
This could cause problems for the low-level console code where
received characters would trigger an interrupt that causes
the interrupt handler to read the character instead of the
cngetc() function.
This commit is contained in:
marcel 2006-04-03 17:48:09 +00:00
parent 5980319eac
commit 64ac08d05f
1 changed files with 3 additions and 3 deletions
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6
sys/kern/subr_kdb.c
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@ -456,7 +456,7 @@ kdb_trap(int type, int code, struct trapframe *tf)
#ifdef SMP
int did_stop_cpus;
#endif
int handled;
int handled, intr;
if (kdb_dbbe == NULL || kdb_dbbe->dbbe_trap == NULL)
return (0);
@ -465,7 +465,7 @@ kdb_trap(int type, int code, struct trapframe *tf)
if (kdb_active)
return (0);
critical_enter();
intr = intr_disable();
kdb_active++;
@ -491,7 +491,7 @@ kdb_trap(int type, int code, struct trapframe *tf)
kdb_active--;
critical_exit();
intr_restore(intr);
return (handled);
}