From 7d45c12ce45d15aab93214ea214d6b5b4bbb8689 Mon Sep 17 00:00:00 2001
From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Sat, 7 Mar 2015 17:07:46 +0100
Subject: add revert-spl-thing.patch

---
 debian/patches/revert-spl-thing.patch | 108 ++++++++++++++++++++++++++++++++++
 debian/patches/series                 |   1 +
 2 files changed, 109 insertions(+)
 create mode 100644 debian/patches/revert-spl-thing.patch

diff --git a/debian/patches/revert-spl-thing.patch b/debian/patches/revert-spl-thing.patch
new file mode 100644
index 0000000..de4fbb8
--- /dev/null
+++ b/debian/patches/revert-spl-thing.patch
@@ -0,0 +1,108 @@
+commit f36b303045935bfd5ff830023e2dcf6e3124432a
+Author: Justus Winter <4winter@informatik.uni-hamburg.de>
+Date:   Sat Mar 7 10:28:19 2015 +0100
+
+    Revert "Make spl7 just clear IF instead of setting the PIC mask"
+    
+    This reverts commit 6f8e390eea2ac9aaa754e1ab2ecd73af5857f798.
+
+diff --git a/i386/i386/locore.S b/i386/i386/locore.S
+index cfda86f..fe39b67 100644
+--- a/i386/i386/locore.S
++++ b/i386/i386/locore.S
+@@ -119,7 +119,6 @@ LEXT(retry_table_end)			;\
+  * Uses %eax, %ebx, %ecx.
+  */
+ #define	TIME_TRAP_UENTRY \
+-	pushf					/* Save flags */	;\
+ 	cli					/* block interrupts */	;\
+ 	movl	VA_ETC,%ebx			/* get timer value */	;\
+ 	movl	CX(EXT(current_tstamp),%edx),%ecx	/* get old time stamp */;\
+@@ -132,7 +131,7 @@ LEXT(retry_table_end)			;\
+ 0:	addl	$(TH_SYSTEM_TIMER-TH_USER_TIMER),%ecx			;\
+ 						/* switch to sys timer */;\
+ 	movl	%ecx,CX(EXT(current_timer),%edx)	/* make it current */	;\
+-	popf					/* allow interrupts */
++	sti					/* allow interrupts */
+ 
+ /*
+  * Update time on system call entry.
+@@ -142,7 +141,6 @@ LEXT(retry_table_end)			;\
+  * Same as TIME_TRAP_UENTRY, but preserves %eax.
+  */
+ #define	TIME_TRAP_SENTRY \
+-	pushf					/* Save flags */	;\
+ 	cli					/* block interrupts */	;\
+ 	movl	VA_ETC,%ebx			/* get timer value */	;\
+ 	movl	CX(EXT(current_tstamp),%edx),%ecx	/* get old time stamp */;\
+@@ -157,7 +155,7 @@ LEXT(retry_table_end)			;\
+ 0:	addl	$(TH_SYSTEM_TIMER-TH_USER_TIMER),%ecx			;\
+ 						/* switch to sys timer */;\
+ 	movl	%ecx,CX(EXT(current_timer),%edx)	/* make it current */	;\
+-	popf					/* allow interrupts */
++	sti					/* allow interrupts */
+ 
+ /*
+  * update time on user trap exit.
+diff --git a/i386/i386/spl.S b/i386/i386/spl.S
+index 41458ac..3c07509 100644
+--- a/i386/i386/spl.S
++++ b/i386/i386/spl.S
+@@ -140,35 +140,15 @@ Entry(splsched)
+ Entry(splhigh)
+ Entry(splhi)
+ ENTRY(spl7)
+-	/* ipl7 just clears IF */
+-	movl	$SPL7,%eax
+-	xchgl	EXT(curr_ipl),%eax
+-	cli
+-	ret
++	SETIPL(SPL7)
+ 
+ ENTRY(splx)
+ 	movl	S_ARG0,%edx		/* get ipl */
+-
+-#if MACH_KDB || MACH_TTD
+-	/* First make sure that if we're exitting from ipl7, IF is still cleared */
+-	cmpl	$SPL7,EXT(curr_ipl)	/* from ipl7? */
+-	jne	0f
+-	pushfl
+-	popl	%eax
+-	testl	$0x200,%eax		/* IF? */
+-	jz	0f
+-	int3				/* Oops, interrupts got enabled?! */
+-
+-0:
+-#endif	/* MACH_KDB || MACH_TTD */
+ 	testl	%edx,%edx		/* spl0? */
+ 	jz	EXT(spl0)		/* yes, handle specially */
+ 	cmpl	EXT(curr_ipl),%edx	/* same ipl as current? */
+ 	jne	spl			/* no */
+-	cmpl	$SPL7,%edx		/* spl7? */
+-	je	1f			/* to ipl7, don't enable interrupts */
+ 	sti				/* ensure interrupts are enabled */
+-1:
+ 	movl	%edx,%eax		/* return previous ipl */
+ 	ret
+ 
+@@ -227,20 +207,6 @@ splx_cli:
+ 	.align	TEXT_ALIGN
+ 	.globl	spl
+ spl:
+-#if MACH_KDB || MACH_TTD
+-	/* First make sure that if we're exitting from ipl7, IF is still cleared */
+-	cmpl	$SPL7,EXT(curr_ipl)	/* from ipl7? */
+-	jne	0f
+-	pushfl
+-	popl	%eax
+-	testl	$0x200,%eax		/* IF? */
+-	jz	0f
+-	int3				/* Oops, interrupts got enabled?! */
+-
+-0:
+-#endif	/* MACH_KDB || MACH_TTD */
+-	cmpl	$SPL7,%edx		/* spl7? */
+-	je	EXT(spl7)		/* yes, handle specially */
+ 	movl	EXT(pic_mask)(,%edx,4),%eax
+ 					/* get PIC mask */
+ 	cli				/* disable interrupts */
diff --git a/debian/patches/series b/debian/patches/series
index f8f5c70..d0f85d2 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -9,3 +9,4 @@ vm_cache_policy.patch
 vm_page_cleanq.patch
 task-load.patch
 0001-kern-inherit-the-name-of-the-parent-task.patch
+revert-spl-thing.patch
-- 
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