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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Mon, 3 Jun 2013 17:40:06 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r251324 - in head/sys: amd64/amd64 i386/i386
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Author: kib
Date: Mon Jun  3 17:40:05 2013
New Revision: 251324
URL: http://svnweb.freebsd.org/changeset/base/251324

Log:
  Assert that interrupts are enabled in the trap handlers on x86 before
  calling generic code to deliver signals.
  
  Discussed with:	bde
  Tested by:	pho
  MFC after:	1 week

Modified:
  head/sys/amd64/amd64/trap.c
  head/sys/i386/i386/trap.c

Modified: head/sys/amd64/amd64/trap.c
==============================================================================
--- head/sys/amd64/amd64/trap.c	Mon Jun  3 17:38:57 2013	(r251323)
+++ head/sys/amd64/amd64/trap.c	Mon Jun  3 17:40:05 2013	(r251324)
@@ -630,6 +630,7 @@ trap(struct trapframe *frame)
 		    fubyte((void *)(frame->tf_rip + 6)),
 		    fubyte((void *)(frame->tf_rip + 7)));
 	}
+	KASSERT((read_rflags() & PSL_I) != 0, ("interrupts disabled"));
 	trapsignal(td, &ksi);
 
 user:

Modified: head/sys/i386/i386/trap.c
==============================================================================
--- head/sys/i386/i386/trap.c	Mon Jun  3 17:38:57 2013	(r251323)
+++ head/sys/i386/i386/trap.c	Mon Jun  3 17:40:05 2013	(r251324)
@@ -780,6 +780,7 @@ trap(struct trapframe *frame)
 		    fubyte((void *)(frame->tf_eip + 6)),
 		    fubyte((void *)(frame->tf_eip + 7)));
 	}
+	KASSERT((read_eflags() & PSL_I) != 0, ("interrupts disabled"));
 	trapsignal(td, &ksi);
 
 #ifdef DEBUG