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For the resume/recurse case, make sure that the interrupt mask level 

of the handler is set before acquiring the kernel lock, to avoid a
recursive chain of interrupt processing out of splx().
This commit is contained in:
fvdl 2002-12-04 23:13:09 +00:00
parent 66efc8657b
commit 93f2be9ef0
1 changed files with 5 additions and 5 deletions
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10
sys/arch/i386/i386/vector.S
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@ -1,4 +1,4 @@
/* $NetBSD: vector.S,v 1.3 2002/12/01 00:15:36 fvdl Exp $ */
/* $NetBSD: vector.S,v 1.4 2002/12/04 23:13:09 fvdl Exp $ */
/*
* Copyright 2002 (c) Wasabi Systems, Inc.
@ -258,9 +258,9 @@ IDTVEC(recurse_/**/name/**/num) ;\
pushl $T_ASTFLT /* trap # for doing ASTs */ ;\
INTRENTRY ;\
IDTVEC(resume_/**/name/**/num) \
movl CPUVAR(ISOURCES) + (num) * 4, %ebp ;\
pushl %ebx ;\
movl %ebx,%esi ;\
movl CPUVAR(ISOURCES) + (num) * 4, %ebp ;\
movl IS_MAXLEVEL(%ebp),%ebx ;\
jmp 1f ;\
IDTVEC(intr_/**/name/**/num) ;\
pushl $0 /* dummy error code */ ;\
@ -275,12 +275,12 @@ IDTVEC(intr_/**/name/**/num) ;\
movl CPUVAR(ILEVEL),%esi ;\
cmpl %ebx,%esi ;\
jae 10f /* currently masked; hold it */ ;\
pushl %esi ;\
movl %ebx,CPUVAR(ILEVEL) ;\
incl MY_COUNT+V_INTR /* statistical info */ ;\
addl $1,IS_EVCNTLO(%ebp) /* inc event counter */ ;\
adcl $0,IS_EVCNTHI(%ebp) ;\
1: \
pushl %esi ;\
movl %ebx,CPUVAR(ILEVEL) ;\
sti ;\
incl CPUVAR(IDEPTH) ;\
movl IS_HANDLERS(%ebp),%ebx ;\